SIGNALING FOR LOW LATENCY COMMUNICATION MULTIPLEXING AND SIDELINK COMMUNICATIONS

专利摘要:
methods, systems and devices for wireless communication are described. in a fdd system, a eu can identify an indicator associated with ultra-reliable low-latency communications (urllc) during communication over a sidelink channel. the eu can also identify dedicated uplink resources on the sidelink channel, and reserve dedicated uplink resources. Dedicated uplink resources can be booked through a negative acknowledgment / acknowledgment return (ack / nack) or for a scheduling request (sr). urllc data can be communicated, and reserved uplink resources can be used to transmit an ack / nack return or a mr. in a tdd system, a base station can transmit information by identifying dedicated resources for urllc data. in some cases, a base station can transmit an indicator channel, which a sidelink eu can monitor to determine the presence of urlc data, and respond accordingly.
公开号:BR112019018035A2
申请号:R112019018035-4
申请日:2018-02-17
公开日:2020-03-31
发明作者:Li Chong；Gupta Piyush；Li Junyi
申请人:Qualcomm Incorporated；
IPC主号:

专利说明:

SIGNALING FOR LOW LATENCY COMMUNICATION MULTIPLEXING AND SIDELINK COMMUNICATIONS CROSS REFERENCES [0001] The present patent application claims priority to US Patent Application No. 15 / 711,751 by Li et al., Entitled Signaling For Multiplexing Of Low Latency Communication And Sidelink Communications, filed on September 21, 2017; U.S. Provisional Patent Application No. 62 / 469,416 by Gupta et al, titled. Techniques and Apparatus For Reducing Sidelink Interference With Loww-Latency Traffic In New Radio deposited on March 9, 2017; and U.S. Provisional Patent Application No. 62 / 466,839 by Li et al., entitled Signaling For Multiplexing Of Low Latency Communication And Sidelink Communications In Frequency Division Duplexing Systems, filed March 3, 2017; each of which is assigned to the assignee.
FUNDAMENTALS [0002] The following generally refers to wireless communication, and more specifically to signaling for low latency multiplexing (LLC) and sidelink communications.
[0003] Wireless communications systems are widely used to provide various types of communication content, such as voice, video, packet data, message exchange, broadcast, and so on. These systems may be able to support communication with multiple users by sharing available system resources (for example, time, frequency, and power). Examples of such multiple access systems include
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2/104 Code Division Multiple Access Systems (CDMA), Time Division Multiple Access Systems (TDMA), Frequency Division Multiple Access Systems (FDMA), Orthogonal Frequency Division Multiple Access Systems (OFDMA ), (for example, a Long Term Evolution (LTE) system, or a Novo Radio (NR) system). A wireless multiple access communications system can include multiple base stations or access network nodes, each communication simultaneously supporting multiple communication devices, which may otherwise be known as user equipment (UE).
[0004] In some cases, a UE LLC or a base station may communicate in a geographical area where another UE (for example, a sidelink UE) associated with the base station is performing sidelink or other communications. Different transmissions involving devices, such as the sidelink UE, can cause interference that prevents or decreases the effectiveness of low latency-based communications between the base station and the UE LLC.
SUMMARY [0005] The techniques described refer to improved methods, systems, devices or devices that support signaling for LLC multiplexing and sidelink communications. Different transmissions involving a UE LLC, a base station, and a sidelink UE in a geographic area can cause interference that prevents or decreases the effectiveness of low latency-based communications between the base station and the UE LLC.
[0006] For example, in a frequency division duplex (FDD) system, the UE LLC (for example, a UE
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3/104 capable of low-latency-based communications, such as ultra-reliable low-latency communications (URLLC)) can send an LLC broadcast in a less concessional manner, puncturing assigned uplink resources for sidelink data. In some instances, in a time division duplex (TDD) system, LLC transmissions may use transmission time intervals (TTI) allocated for sidelink transmissions. In both cases, the sidelink UE may also be transmitting sidelink data during the same time or an overlap time using the same resources allocated for sidelink data resulting in signal interference. In some cases, LLC data cannot be successfully received or decrypted, and UE LLC may need to relay LLC data, and it can do so using resources that could be allocated for sidelink data. As another example, a base station can transmit data from LLC to a UE LLC, and UE LLC can quickly attempt to transmit acknowledgment feedback (ACK) / negative acknowledgment (NACK) by punching resources allocated to sidelink data. But the ACK / NACK return cannot be received by the base station due to interference or other problems. In both cases, it may be beneficial for a sidelink UE and an UE LLC to identify scenarios in which LLC information or data is present, and to initiate certain actions to minimize interference and waste of resources.
[0007] Generally speaking, in a set of examples of an FDD system, the techniques described prove to identify an indicator associated with LLC (for example, URLLC) during communication on a sidelink channel,
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4/104 identify dedicated uplink resources on the sidelink channel based on the indicator ID, and reserve the dedicated uplink resources on the sidelink channel for an ACK / NACK return transmission. In some instances, LLC may include a first duration TTI, and the sidelink channel may include a second duration TTI that is longer than the first duration TTI. In some cases, reserved dedicated uplink resources may include resources in multiple first successive TTIs. In some cases, reserved dedicated uplink resources may include resources in a first TTI of individual duration. The described techniques also allow the receipt of LLC data with the first duration TTI, identifying dedicated uplink resources on a sidelink channel and transmitting the ACK / NACK feedback using the dedicated uplink resources.
[0008] The techniques described may include performing an LLC broadcast having a first duration TTI on a sidelink channel, identifying dedicated uplink resources for scheduling requests (SRs) on the sidelink channel, and transmitting an SR to a base station , using the dedicated uplink resources on the sidelink channel. In some cases, the sidelink channel may include a second duration TTI, and the first duration TTI may be shorter than the second duration TTI. In some cases, the LLC broadcast may be broadcast before receiving a programming grant. If a programming grant is then received, the LLC can be relayed. In addition, the techniques described prove to identify an indicator associated with LLC,
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5/104 identify dedicated uplink resources for SRs on the sidelink channel, and reserve dedicated uplink resources for a transmission of SRs on the sidelink channel. If a programming lease is detected, communications on the sidelink channel may be temporarily suspended to facilitate the LLC with the base station.
[0009] In another set of examples, in a TDD system, the techniques described can include receiving a wireless downlink communication, identifying dedicated resources for transmissions having a first duration TTI (for example, LLC transmissions) on a channel of sidelink based at least in part on receiving wireless downlink communication. In some cases, the sidelink channel may be for performing device-to-device (D2D) wireless communications using a second duration TTI, and the first duration TTI may be shorter than the second duration TTI. The system may also include reserving dedicated resources for LLC broadcasts. In addition, in some instances, a base station may transmit and a UE may receive an indicator associated with wireless communications having the first duration TTI on a sidelink channel while conducting D2D wireless communications. In some cases, the first duration TTI may be shorter than the second duration TTI. The UE can identify dedicated resources on the sidelink channel for LLC traffic based at least in part on the indicator identification, and can suspend sidelink communications on the sidelink channel during the identified resources.
[0010] A wireless communication method is described. The method may include the identification of a
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6/104 indicator associated with wireless communications having a first duration TTI on a sidelink channel while conducting D2D wireless communications on the sidelink channel using a second duration TTI, where the first duration TTI is shorter than that the second duration TTI, receive a wireless downlink communication having the first duration TTI, in which the wireless downlink communication is received according to an FDD configuration, identify dedicated uplink resources for ACK / return NACK based at least in part on the indicator identification, receiving wireless downlink communication, or both, and reserving the dedicated uplink resources for the forward transmission of ACK / NACK to a base station.
[0011] A device for wireless communication is described. The apparatus may include means for identifying an indicator associated with wireless communications having a first TTI of duration on a sidelink channel while conducting wireless D2D communications on the sidelink channel using a second TTI of duration, wherein the first TTI of duration is shorter than the second duration TTI, means for receiving a wireless downlink communication having the first duration TTI, in which the wireless downlink communication is received according to an FDD configuration, means for identifying resources dedicated uplink calls for ACK / NACK feedback based at least in part on indicator identification, receiving wireless downlink communication, or both, and means to reserve dedicated uplink resources for ACK / NACK feedback transmission to a base station.
[0012] Another device for communication without
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7/104 wire is described. The device can include a processor, electronic memory in communication with the processor, and instructions stored in memory. The instructions can be operable to make the processor identify an indicator associated with wireless communications having a first TTI of duration on a sidelink channel while conducting D2D wireless communications on the sidelink channel using a second TTI of duration, on that the first duration TTI is shorter than the second duration TTI, receiving a wireless downlink communication having the first duration TTI, in which the wireless downlink communication is received according to an FDD configuration, identify the dedicated uplink resources for ACK / NACK feedback based at least in part on the indicator ID, receive wireless downlink communication, or both, and reserve the dedicated uplink resources for ACK / NACK feedback transmission to a base station.
[0013] A non-transitory, computer-readable medium for wireless communication is described. The non-transitory computer-readable medium may include operable instructions to have a processor identify an indicator associated with wireless communications having a first duration TTI on a sidelink channel while conducting D2D wireless communications on the sidelink channel using a second duration TTI, in which the first duration TTI is shorter than the second duration TTI, receiving a wireless downlink communication having the first duration TTI, in which the wireless downlink communication is received according to an FDD configuration, identify the dedicated uplink resources for the
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8/104 ACK / NACK feedback based at least in part on identifying the indicator, receiving wireless downlink communication, or both, and reserving dedicated uplink resources for an ACK / NACK feedback transmission to a base station .
[0014] In some examples of the non-transitory computer-readable method, apparatus and medium described above, the dedicated uplink resources comprise a resource in each first TTI of duration in a plurality of successive first TTIs.
[0015] In some examples of the non-transitory computer-readable method, apparatus and medium described above, the dedicated uplink resources comprise a resource in a subset of the first duration TTIs in a plurality of successive first TTIs.
[0016] Some examples of the non-transitory computer-readable method, apparatus and medium described above may also include processes, resources, means, or instructions for monitoring an indication channel in the plurality of successive first TTIs to identify a low traffic presence latency. Some examples of the non-transitory computer-readable method, apparatus and medium described above may also include processes, resources, means, or instructions for determining the subset based at least in part on monitoring the referral channel.
[0017] Some examples of the non-transitory computer-readable method, device and medium described above may also include processes, resources, means, or instructions for reserving the dedicated uplink resources
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9/104 comprising emptying at least one resource of scheduled sidelink data transmissions.
[0018] In some examples of the non-transitory computer-readable method, apparatus and medium described above, the subset of the first TTIs of duration can be a first TTI of individual duration in the plurality of successive first TTIs.
[0019] Some examples of the non-transitory computer-readable method, device and medium described above may also include processes, resources, means, or instructions for monitoring, during a first period, a downlink indication channel in each first duration TTI in a plurality of successive first TTIs for low latency communication information. Some examples of the non-transitory computer-readable method, apparatus and medium described above may also include processes, resources, means, or instructions for determining whether a low-latency communication traffic profile during the first period may be above a threshold based on at least in part in monitoring, where reserving the dedicated uplink resources to transmit ACK / NACK feedback comprises reserving the dedicated uplink resources using a first mode or a second mode based at least in part on the determination.
[0020] In some examples of the non-transitory computer-readable method, apparatus and medium described above, a low-latency communication traffic profile comprises at least one of the group that includes a traffic rate, a traffic level of reliability requirement , and a quantity of URLLC traffic during
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10/104 a period of time.
[0021] In some examples of the non-transitory computer-readable method, apparatus and medium described above, the first mode comprises reserving a resource in each first TTI of duration in the plurality of successive first TTIs. In some examples of the non-transitory computer-readable method, apparatus and medium described above, the second mode comprises reserving a resource in a next first TTI of duration in the plurality of successive first TTIs.
[0022] In some examples of the non-transitory computer-readable method, apparatus and medium described above, the indicator comprises a presence of low-latency communication traffic, a location of a low-latency communication UE, other information associated with communication of low latency, or a combination of them.
[0023] In some examples of the non-transitory computer-readable method, device and medium described above, wireless downlink communication having the first duration TTI comprises low latency communication data.
[0024] A wireless communication method described. The method may include conducting wireless uplink communications having a first duration TTI on a sidelink channel, the sidelink channel also configured for wireless communications having a second duration TTI, where the first duration TTI is longer shorter than the second duration TTI, identify an indicator associated with wireless uplink communications,
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11/104 identify dedicated uplink resources for programming requests (SRs) for wireless uplink communication having the first lifetime TTI on the sidelink channel, reserve dedicated uplink resources for a transmission of SRs for wireless uplink communications having the first duration TTI, and transmit an SR to a base station, using the dedicated uplink resources on the sidelink channel.
[0025] A device for wireless communication is described. The apparatus may include means for conducting wireless uplink communications having a first duration TTI on a sidelink channel, the sidelink channel also configured for wireless communications having a second duration TTI, wherein the first duration TTI is shorter than the second duration TTI, means to identify an indicator associated with wireless uplink communications, means to identify dedicated uplink resources for SRs by wireless uplink communications having the first duration TTI on the sidelink channel , means for reserving the dedicated uplink resources for a transmission of SRs for wireless uplink communications having the first duration TTI, and means for transmitting an SR to a base station, using the dedicated uplink resources on the sidelink channel.
[0026] Another device for wireless communication is described. The device can include a processor, electronic memory in communication with the processor, and instructions stored in memory. Instructions can be operable to make the processor perform wireless uplink communications by having a first TTI of
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12/104 duration on a sidelink channel, the sidelink channel also configured for wireless communications having a second duration TTI, where the first duration TTI is shorter than the second duration TTI, identifying an indicator associated with wireless uplink communications, identify dedicated uplink resources for SRs by wireless uplink communications having the first lifetime TTI on the sidelink channel, reserve dedicated uplink resources for an SR transmission for wireless uplink communications having the first duration TTI and transmit an SR to a base station, using the dedicated uplink resources on the sidelink channel.
[0027] A non-transitory, computer-readable medium for wireless communication is described. The non-transitory computer-readable medium may include operable instructions to have a processor perform wireless uplink communications having a first TTI of duration on a sidelink channel, the sidelink channel also configured for wireless communications having a second TTI of duration, where the first duration TTI is shorter than the second duration TTI, identify an indicator associated with wireless uplink communications, identify dedicated uplink resources for SRs by wireless uplink communications having the first duration on the sidelink channel, reserve the dedicated uplink resources for a transmission of SRs for wireless uplink communications having the first duration TTI, and transmit an SR to a base station using the dedicated uplink resources on the channel
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13/104 sidelink.
[0028] In some examples of the non-transitory computer-readable method, apparatus and medium described above, the dedicated uplink resources comprise a resource in each first TTI of duration in a plurality of successive first TTIs.
[0029] In some examples of the non-transitory computer-readable method, apparatus and medium described above, the dedicated uplink resources comprise a resource in a subset of the first duration TTIs in a plurality of successive first TTIs.
[0030] In some examples of the non-transitory computer-readable method, apparatus and medium described above, performing wireless uplink communications on the sidelink channel comprises: transmitting a low latency communication having the first duration TTI to the base station before receiving a programming grant.
[0031] Some examples of the non-transitory computer-readable method, apparatus and medium described above may also include processes, resources, means, or instructions for receiving a transmission failure indicator in response to the transmission of low latency communication. Some examples of the non-transitory computer-readable method, apparatus and medium described above may also include processes, resources, means, or instructions for receiving a programming grant in response to the transmission of the SR to the base station.
[0032] Some examples of the non-transitory computer-readable method, apparatus and medium described above may also include processes, resources, means, or
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14/104 instructions for relaying the low latency communication having the first duration TTI to the base station on the base sidelink channel at least in part in the programming grant.
[0033] In some examples of the non-transitory computer-readable method, device and medium described above, the transmission failure indicator and the programming grant can be received during the same transmission.
[0034] Some examples of the non-transitory computer-readable method, apparatus and medium described above may also include processes, resources, means, or instructions for monitoring a downlink indication channel in each first duration TTI in a plurality of successive first TTIss. Some examples of the non-transitory computer-readable method, apparatus and medium described above may also include processes, resources, means, or instructions for detecting a programming concession based at least in part on the control.
[0035] Some examples of the non-transitory computer-readable method, apparatus and medium described above may also include processes, resources, means, or instructions for suspending sidelink communications on the sidelink channel during a first TTI of individual duration in the plurality of successive first TTI based at least in part on the detection of the programming concession.
[0036] In some examples of the non-transitory computer-readable method, apparatus and medium described above, the first individual duration TTI comprises a
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10/154 next first TTI of duration in the plurality of successive first TTIs.
[0037] A wireless communication method is described. The method may include receiving a wireless downlink communication according to a TDD configuration, identifying dedicated resources for transmission having a first duration TTI on a sidelink channel based at least in part on receiving the wireless downlink communication, where the sidelink channel is used to perform D2D wireless communications using a second TTI of duration, and where the first TTI of duration is shorter than the second TTI of duration, and reserve dedicated resources for transmissions having the first TTI.
[0038] A device for wireless communication is described. The apparatus may include means for receiving a wireless downlink communication according to a TDD configuration, means for identifying dedicated resources for transmission having a first duration TTI on a sidelink channel based at least in part on receiving the wireless communication from downlink, where the sidelink channel is for conducting D2D wireless communications using a second duration TTI, and where the first duration TTI is shorter than the second duration TTI, and means to reserve dedicated resources for transmissions having the first TTI.
[0039] Another device for wireless communication is described. The device can include a processor, electronic memory in communication with the processor, and instructions stored in memory. Instructions can be operable to make the processor receive a
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16/104 wireless downlink communication according to a TDD configuration, identify dedicated resources for transmission having a first duration TTI on a sidelink channel based at least in part on receiving the wireless downlink communication, where the downlink channel sidelink is for conducting D2D wireless communications using a second TTI of duration, and where the first TTI of duration is less than the second TTI of duration, and reserve the dedicated resources for transmissions with the first TTI.
[0040] A non-transitory, computer-readable medium for wireless communication is described. The non-transitory computer-readable medium may include operable instructions to make a processor receive a wireless downlink communication according to a TDD configuration, identify dedicated resources for transmission having a first duration TTI on a sidelink channel based at least partly in receiving wireless downlink communication, where the sidelink channel is for conducting D2D wireless communications using a second TTI of duration, and where the first TTI of duration is shorter than the second TTI of duration, and reserve the dedicated resources for transmissions having the first TTI.
[0041] Some examples of the non-transitory computer-readable method, apparatus and medium described above may also include processes, resources, means, or instructions for identifying spaces programmed in the sidelink channel, on which the identification of dedicated resources can be based at least partly in the programmed spaces identified.
[0042] In some examples of the method, apparatus and
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17/104 non-transitory computer readable medium described above, wireless downlink communication can be received on a channel of a downlink control quadrat, a subframe, or a partition corresponding to the dedicated resources.
[0043] In some examples of the non-transitory computer-readable method, apparatus and medium described above, identifying dedicated resources comprises: identifying a TDD pattern. Some examples of the non-transitory, computer-readable method, device and medium described above may also include processes, resources, means, or instructions to determine whether low-latency traffic can be uplink traffic or downlink traffic, based at least in part in the identified TDD standard.
[0044] Some examples of the non-transitory, computer-readable method, apparatus and medium described above may also include processes, resources, means, or instructions for determining that low communications
latency will use two or less first TTI in duration. [0045] One method of communication without thread is described. The method can include the identification in one indicator associated with wireless communications having one
first duration TTI on a sidelink channel while conducting D2D wireless communications on a sidelink channel using second duration TTI transmissions, where the first duration TTI is shorter than the second duration TTI, identify resources dedicated on the sidelink channel for low latency communications based on
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18/104 less in part in identifying the indicator, and suspending sidelink communications on the sidelink channel during the identified resources.
[0046] A device for wireless communication is described. The apparatus may include means for identifying an indicator associated with wireless communications having a first TTI of duration on a sidelink channel while conducting wireless D2D communications on a sidelink channel using transmissions of a second TTI of duration, where the first duration TTI is shorter than the second duration TTI, means to identify dedicated resources on the sidelink channel for low latency communications based at least in part on the indicator identification, and means to suspend sidelink communications on the channel sidelink during the identified resources.
[0047] Another device for wireless communication is described. The device can include a processor, electronic memory in communication with the processor, and instructions stored in memory. The instructions can be operable to make the processor identify an indicator associated with wireless communications having a first TTI of duration on a sidelink channel while conducting D2D wireless communications on a sidelink channel using transmissions from a second TTI of duration, where the first duration TTI is shorter than the second duration TTI, identify dedicated resources on the sidelink channel for low latency communications based at least in part on the indicator identification, and suspend sidelink communications on sidelink channel during the identified resources.
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19/104 [0048] A non-transitory, computer-readable medium for wireless communication is described. The non-transitory computer-readable medium may include operable instructions to have a processor identify an indicator associated with wireless communications having a first TTI of duration on a sidelink channel while conducting D2D wireless communications on a sidelink channel using transmissions of a second duration TTI, where the first duration TTI is shorter than the second duration TTI, identifies dedicated resources on the sidelink channel for low latency communications based at least in part on the identification of the indicator, and suspend sidelink communications on the sidelink channel during identified resources.
[0049] Some examples of the non-transitory computer-readable method, apparatus and medium described above may also include processes, resources, means, or instructions to determine that low-latency communications will use more than the first two TTIs of duration, in which identifying the indicator can be based at least in part on the determination.
[0050] In some examples of the non-transitory computer-readable method, apparatus and medium described above, identifying dedicated resources comprises: identifying a TDD pattern. Some examples of the non-transitory computer-readable method, apparatus and medium described above may also include processes, resources, means, or instructions for determining whether low-latency traffic can be uplink traffic or downlink traffic, based at least in part on the TDD pattern identified.
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20/104 [0051] Some examples of the non-transitory computer-readable method, apparatus and medium described above may also include processes, resources, means, or instructions for performing one or more low-latency transmissions on the resources identified on the channel. sidelink. Some examples of the non-transitory computer-readable method, apparatus and medium described above may also include processes, resources, means, or instructions for resuming sidelink communications on the sidelink channel after making one or more low-latency transmissions.
BRIEF DESCRIPTION OF THE DRAWINGS [0052] Figure 1 illustrates an example of a wireless communication system that supports signaling for LLC multiplexing and sidelink communications in accordance with aspects of the present disclosure.
[0053] Figure 2 illustrates an example of a wireless communication system that supports signaling for LLC multiplexing and sidelink communications in accordance with aspects of the present disclosure.
[0054] Figure 3 illustrates an example of a wireless communication configuration that supports signaling for LLC multiplexing and sidelink communications in accordance with aspects of the present disclosure.
[0055] Figure 4 illustrates an example of a wireless communication configuration that supports signaling for LLC multiplexing and sidelink communications in accordance with aspects of the present disclosure.
[0056] Figure 5 illustrates an example of a wireless communication configuration that supports signaling
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21/104 for LLC multiplexing and sidelink communications in accordance with aspects of this disclosure.
[0057] Figure 6 illustrates an example of a wireless communication configuration that supports signaling for low latency multiplexing and sidelink communications, in accordance with aspects of this disclosure.
[0058] Figure 7 illustrates an example of a wireless communication configuration that supports signaling for low latency multiplexing and sidelink communications, in accordance with aspects of this disclosure.
[0059] Figure 8 illustrates an example of a process flow for signaling for multiplexing low latency communication and sidelink communications according to aspects of the present disclosure.
[0060] Figure 9 illustrates an example of a process flow for signaling for multiplexing low latency communication and sidelink communications according to aspects of the present disclosure.
[0061] Figure 10 illustrates an example of a process flow for signaling for multiplexing LLC and sidelink communications according to aspects of the present disclosure.
[0062] Figure 11 illustrates an example of a process flow for signaling for signaling for multiplexing LLC and sidelink communications according to aspects of the present disclosure.
[0063] Figures 12 to 14 show block diagrams of a device that supports signaling for
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22/104 low latency communication multiplexing and sidelink communications in accordance with aspects of this disclosure.
[0064] Figure 15 illustrates a block diagram of a system that includes an UE that supports signaling for multiplexing low latency communication and sidelink communications according to aspects of the present disclosure.
[0065] Figures 16 to 20 illustrate methods for signaling for multiplexing low latency communication and sidelink communications according to aspects of the present disclosure.
DETAILED DESCRIPTION [0066] Different transmissions using time division duplexing (TDD) or frequency division duplexing (FDD) and involving a user equipment (UE) for low latency communication (LLC), a base station, and a UE sidelink in a geographic area can cause interference that impedes or decreases the effectiveness of low latency-based communications between the base station and UE LLC. For example, in an FDD system, the UE LLC (for example, a UE capable of LLC communications, such as reliable low-latency communication (URLLC) can send an LLC broadcast in a less concession way, puncturing uplink resources allocated for sidelink data. The sidelink UE can also transmit sidelink data over the same time or a time overlap using the same resources allocated for sidelink data - resulting in interference from transmitted signals. LLC data cannot be received with
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23/104 successful or decoded, and UE LLC may need to relay LLC data using resources otherwise allocated to sidelink data. As another example, a base station can transmit data from LLC to an UE LLC, and UE LLC can try to quickly transmit negative acknowledgment / acknowledgment (ACK / NACK) by punching resources allocated to sidelink data, but the ACK / NACK may not be received by the base station due to interference. In both cases, it can be beneficial for a sidelink UE and UE LLC to identify scenarios in which LLC data is present and respond appropriately to minimize interference and wasted resources. A base station can reserve a referral channel in downlink transmissions to transmit the presence of LLC data (for example, URLLC data). The base station can assign the referral channel to a first duration transmission time interval (TTI) (for example, a minipartition) or downlink transmissions and transmit the indication channel on the other first duration TTIs (for example, each first successive duration TTI). The referral channel may include information about the presence of LLC traffic, the location of an LLC broadcast, and other information associated with LLC.
[0067] In some cases, a base station may send an LLC broadcast to an UE LLC. LLC broadcasts, such as URLLC broadcasts, may require reverse hybrid fast acknowledgment (HARQ) request reversal. A UE LLC may need to transmit an ACK / NACK return immediately after transmitting the LLC from a base station. In order to ensure that
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24/104 any ACK / NACK transmission is successfully received by the base station, a sidelink UE can reserve uplink resources for ACK / NACK LLC return signaling. The sidelink UE can monitor the referral channel to determine whether an LLC broadcast (which may include LLC data) is present for the UE LLC in the region. After determining that LLC data is present in a first duration TTI, the sidelink UE can reserve, in one or more first duration TTIs, one or more resources for ACK / NACK return signaling. Upon receiving the LLC transmission, a UE LLC can immediately identify the resources reserved for ACk / NACK signaling, and transmit the ACK / NACK return to the base station via the reserved resources. The sidelink UE can use a dynamic mode to reserve resources. The sidelink UE can monitor the referral channel on each first duration TTI, and can reserve one or more resources for the return of ACK / NACK on one or more first duration TTIs (for example, the next first duration TTI) following the first duration TTI in which the indicator was detected. Alternatively, the sidelink UE can engage in a static mode of reserve resources, and can reserve one or more resources in each of the first duration TTIs in a plurality of successive first TTIs related to a second duration TTI. In some instances, the sidelink UE can identify a traffic profile, and can select dynamic mode or static mode based on the traffic profile.
[0068] In some cases, a UE LLC may transmit LLC data to the base station, puncturing
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10/254 uplink assigned for sidelink data. It may be beneficial for the UE LLC to also transmit an SR to the base station to reserve subsequent resources for a retransmission, if the first LLC data transmission fails. The sidelink UE can reserve dedicated resources on each first sidelink channel life TTI after the detection of the first LLC transmission. UE LLC can transmit an SR on reserved dedicated resources while simultaneously transmitting LLC data. A base station can detect and decode the SR on the dedicated resource. If the first transmission fails (for example, due to interference), the base station can transmit a programming lease to schedule a second transmission over a reserved downlink indication channel in response to SR. The sidelink UE can monitor the downlink indication channel in at least some, if not all, of the first duration TTI. If the retransmission schedule grant is detected, the sidelink UE can suspend ongoing sidelink transmissions on resources allocated for the second transmission to accommodate LLC traffic.
[0069] In other examples, in a TDD system, a base station can transmit control information indicating dedicated resources for LLC transmissions. The sidelink UE can identify dedicated resources, which can be based on spaces in scheduled sidelink transmissions. The sidelink UE can reserve dedicated uplink resources corresponding to identified TTIs (for example, symbols) and a UE LLC can use those reserved resources to transmit (or receive) transmissions from
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LLC. In yet other examples of a TDD system, a base station can transmit LLC broadcasts, and can also broadcast an indicator, which includes a replacement signal for the case in which LLC broadcasts are pending. A sidelink UE can identify the indicator, and can identify dedicated resources corresponding to the indicator for LLC traffic. During identified resources, the sidelink UE may suspend sidelink communications, and may resume sidelink communications after a UE LLC has transmitted or received traffic from LLC. If the sidelink UE does not detect the substitution signal while monitoring the indicator, then the sidelink UE can resume sidelink transmissions immediately.
[0070] In some cases, LLC traffic may correspond to short-term transmissions (for example, two symbols or less). In such examples, a base station can avoid interference on a sidelink channel by reserving signals in certain TTIs (for example, symbols) for LLC traffic. The base station can identify reserved TTIs in a downlink control channel (for example, a PDCCH), and can use spaces in the sidelink signaling programmed for the reserved TTIs.
[0071] In some cases, LLC traffic may correspond to relatively longer durations (for example, more than two symbols). In such cases, a base station can avoid interference on a sidelink channel when transmitting the indicator, in such a way that the sidelink UE can suspend transmission during resources corresponding to the indicator.
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27/104 [0072] Aspects of the invention are initially described in the context of a wireless communications system. Aspects of the invention are further illustrated by and described with reference to wireless communications systems and wireless communications configurations. Aspects of the invention are further illustrated by and described with reference to device diagrams, system diagrams, and flowcharts that relate to signaling for LLC multiplexing and sidelink communications. Although several aspects of this technique refer to improved methods, systems, devices or devices that support signaling for multiplexing in sidelink and FDD and URLLC systems, the present disclosure is not limited to these systems or applications. In addition, this disclosure is not limited to sidelink and URLLC communications, and any discussion of sidelink, URLLC, or LLC is merely exemplary of the broader applications of these techniques for other information or transmissions, including, but not limited to, communications and mission critical or other time sensitive applications.
[0073] Figure 1 illustrates an example of a wireless communication system 100, which supports signaling for multiplexing in accordance with various aspects of the present disclosure. The wireless communications system 100 includes base stations 105, UEs 115, and a core network 130. In some instances, the wireless communications system 100 may be a Long Term Evolution (LTE), LTE-Advanced (LTE- A), or a Novo Rádio (NR) network. In some cases, the wireless communications system 100 can support improved broadband communications,
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28/104 ultra-reliable communications (ie critical), low latency communications, and communication with low cost and low complexity devices.
[0074] In some cases, base stations and UEs may use dynamic resource sharing to transmit critical information in an FDD system. Critical information can include URLLC or mission critical information (MiCr). Alternatively, advanced mobile broadband communications (eMBB) can be used for communications that are generally not considered critical. Dynamic resource sharing can include drilling, where a base station may not wait for successive TTIs to transmit URLLC data. In downlink messages, a base station can use an indication-based multiplexing approach to transmit drilling to the UE. An eMBB UE can detect an indicator transmitted by the base station and discard resources reserved for URLLC, which can improve decoding performance and improve UE power efficiency. Additionally or alternatively, a UE URLLC can detect the indicator transmitted by the base station and then begin decoding the multiplexed information. The indicator can contain information, such as a flag indicating the existence of URLLC data, perforated frequency or time resources, a power ratio, etc., While the base station can transmit the indicator to the UEs, the UEs can transmit other information among themselves.
[0075] In some cases, wireless communication system 100 can support signaling for multiplexing
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29/104 (for example, signaling for sidelink / URLLC multiplexing) in an FDD system. A base station can transmit URLLC data to a UE URLLC. The UE URLLC can immediately transmit acknowledgment ACK / NACK feedback. A sidelink UE can monitor an referral channel to determine when URLLC data is present, and can reserve otherwise allocated resources for sidelink data for ACK / NACK return URLLC. The UE URLLC can transmit ACK / NACK feedback via the reserved resources. A UE URLLC can transmit URLLC data via resources allocated for sidelink data. The sidelink UE can reserve resources for an SR. The UE URLLC can use the reserved resources to transmit an SR during the transmission of the URLLC data. The sidelink UE can monitor the referral channel and determine when a base station has transmitted a broadcast relay grant to the URLLC data in response to an SR. The sidelink UE may suspend transmission on resources granted for a scheduled transmission of URLLC data.
[0076] In some cases, base stations and UEs may use dynamic resource sharing to transmit critical information in a TDD system. Critical information can include URLLC or mission critical information (MiCr). Alternatively, enhanced mobile broadband communications (eMBB) can be used for general communications that are not considered critical. Dynamic resource sharing in the time domain can allow the transmission of URLLC data without interference from sidelink transmissions. In
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30/104 some examples, a base station can transmit control information, indicating dedicated resources for LLC transmissions. The sidelink UE can identify dedicated resources, which can be based on spaces in scheduled sidelink transmissions. A sidelink UE can reserve dedicated uplink resources corresponding to identified TTIs (for example, symbols) and a UE LLC can use those reserved resources to transmit (or receive) LLC transmissions. In yet other examples of a TDD system, a base station can transmit LLC transmissions, and it can also transmit an indicator, which includes a replacement signal for the case in which LLC transmissions are pending. A sidelink UE can identify the indicator, and can identify dedicated resources corresponding to the indicator for LLC traffic. During identified resources, the sidelink UE may suspend sidelink communications, and may resume sidelink communications after a UE LLC has transmitted or received traffic from LLC. If the sidelink UE does not detect the substitution signal while monitoring the indicator, then the sidelink UE can resume sidelink transmissions immediately.
[0077] Base stations 105 can communicate wirelessly with UEs 115 through one or more antennas of the base station. Each base station 105 can provide communication coverage for a respective geographic coverage area 110. Communication links 125 shown on wireless communication system 100 may include uplink transmission from UE 115 to base station 105, or transmissions downlink, from
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31/104 a base station 105 for a UE 115. Control information and data can be multiplexed on an uplink or downlink channel according to different techniques. Control information and data can be multiplexed on a downlink channel, for example, using time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. In some instances, the control information transmitted during a downlink channel TTI transmission can be cascaded between different control regions (for example, between a common control region and one or more specific control regions EU).
[0078] UEs 115 can be dispersed throughout the wireless communication system 100, and each UE 115 can be fixed or mobile. UE 115 can also be referred to as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device , a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, an apparatus, a user agent, a mobile client, a client, or some other suitable terminology. An UE 115 can also be a cell phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a portable device, a tablet computer, a portable computer, a cordless phone, an electronic device personal computer, a portable device, a personal computer, a local wireless loop station
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32/104 (WLL), an Internet of Things device (ΙοΤ), an Internet of Everything device (loE), a machine-type communication device (MTC), a device, an automobile, or the like.
[0079] In some cases, a UE 115 may also be able to communicate directly with other UEs (for example, using a point-to-point (P2P) or D2D protocol). One or more of a group of UEs 115 using D2D communications can be within the coverage area 110 of a cell. Other UEs 115 in such a group may be outside coverage area 110 of a cell, or otherwise unable to receive transmissions from a base station 105. In some cases, groups of UEs 115 communicating via communications D2D can use a one-to-many (1: H) system in which each UE 115 transmits to all other UE 115 in the group. In some cases, a base station 105 makes it easy to program resources for D2D communications. In other cases, D2D communications are performed independently of a base station 105.
[0080] Some UEs 115, such as MTC or IcT devices, can be low cost or low complexity devices, and can provide communication between automated machines, that is, machine-to-machine (M2M) communication. M2M or MTC can refer to data communication technologies that allow devices to communicate with each other or a base station without human intervention. For example, M2M or MTC can refer to communications from devices that integrate sensors or meters to measure or capture information and transmit that information to a
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33/104 central server or application that can make use of the information or present the information to humans to interact with the program or application. Some UEs 115 can be designed to collect information or allow automated machine behavior. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, monitoring equipment, health monitoring, wildlife monitoring, geological time and event monitoring, fleet management and tracking, remote security sensing , physical access control, and transaction collection.
[0081] In some cases, an MTC device may operate using half-duplex (unidirectional) communications, at a reduced peak rate. MTC devices can also be configured to enter a deep sleep-saving mode when they are not engaged in active communication. In some cases, MTC or ToT devices can be designed to support mission critical functions and the wireless communications system can be configured to provide highly reliable communication for these functions.
[0082] Base stations 105 can communicate with core network 130 and each other. For example, base stations 105 can interact with core network 130 via return transport channel links 132 (e.g., Sl, etc.). Base stations 105 can communicate with each other over return transport channel links 134 (for example, X2, etc.), either directly or indirectly (for example, through core network 130).
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Base stations 105 can perform radio configuration and programming for communication with UEs 115, or they can operate under the control of a base station controller (not shown). In some instances, base stations 105 may be macro cells, small cells, hot spots, or the like. Base stations 105 can also be referred to as evolved NodesB (eNBs) 105 or next generation Nodes B (gNBs).
[0083] A base station 105 can be connected by an SI interface to the core network 130. The core network can be an evolved packet core (EPC), which can include at least one mobility management entity (MME), at least a service gateway (SGW), and at least one packet data gateway (PDN) (P-GW). The MME can be the control node that processes the signaling between the UE 115 and the EPC. All user Internet Protocol (IP) packages can be transferred via S-GW, which in turn can be connected to P-GW. P-GW can provide allocation of IP addresses, as well as other functions. The P-GW can be connected to the operator's IP service network. Operator IP services may include the Internet, Intranet, an IP Multimedia Subsystem (IMS), and a Packet Switched Streaming Service (PS).
[0084] The core network 130 can provide user authentication, access authorization, monitoring, Internet Protocol (IP) connectivity and other access, routing, or mobility functions. At least some of the network devices, such as base station 105-a, may include subcomponents such as an access network entity 105-b, which may be an example of a network access node.
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35/104 controller (ANC). Each access network entity 105-b can communicate with a number of UEs 115 through a series of other access network transmission entities 105-c, each of which can be an example of an intelligent radio head, or a transmit / receive point (TRP). In some configurations, different functions of each access network entity or base station 105 can be distributed across multiple network devices (for example, radio heads and access network controllers) or consolidated into a single network device (for example, a base station 105).
[0085] The wireless communications system 100 can operate in an ultra-high frequency (UHF) region using frequency bands from 700 MHz to 2600 MHz (2.6 GHz), although some networks (for example, a network of wireless local area (WLAN) can use frequencies as high as 4 GHz. This region can also be known as the decimeter band, since wavelengths vary from about one decimeter to one meter in length. UHF waves can mainly propagate through the line of sight, and can be blocked by buildings and environmental features. However, waves can sufficiently penetrate walls to provide service to 115 internally located UEs. UHF wave transmission is characterized by smaller antennas and shorter range (for example, less than 100 km) compared to transmission frequencies using smaller (and longer waves) or portions of the high frequency (HE) spectrum or very high frequency (VHF). In some cases, the wireless communications system 100 may also use portions of the
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36/104 extremely high frequency spectrum (EHF) (for example, between 30 GHz and 300 GHz). This region can also be known as the millimeter band, since wavelengths vary from approximately one millimeter to one centimeter in length. Thus, EHF antennas can be even smaller and more closely spaced than UHF antennas. In some cases, this may facilitate the use of antenna arrays within an UE 115 (for example, for directional beam formation). However, EHF transmissions may be subject to greater atmospheric attenuation and a shorter range than UHF transmissions.
[0086] Thus, the wireless communication system 100 can support millimeter wave (mmW) communications between UEs 115 and base stations 105. Devices operating in mmW or EHF bands can have multiple antennas to allow the formation of beams. That is, a base station 105 can use multiple antennas or antenna arrays to conduct directional beam forming operations to communicate with an UE 115. Beam formation (which can also be referred to as spatial filtering or directional transmission) is a technique signal processing that can be used on a transmitter (for example, a base station 105) to shape and / or direct an antenna beam in general towards a target receiver (for example, a UE 115). This can be achieved by combining elements in an antenna array so that signals transmitted at specific angles suffer constructive interference while others suffer destructive interference.
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37/104 [0087] Wireless multiple input and multiple output (MIMO) systems use a transmission scheme between a transmitter (for example, a base station 105) and a receiver (for example, a UE 115), where the transmitter and the receiver are equipped with multiple antennas. Some portions of the wireless communication system 100 may use beam formation. For example, base station 105 can have an antenna array with a number of rows and columns of antenna ports that base station 105 can use for beaming in its communication with UE 115. Signals can be transmitted multiple times in different directions (for example, each transmission can be beamed differently). An mmW receiver (for example, a UE 115) can try multiple beams (for example, antenna subarrays), while receiving the synchronization signals.
[0088] In some cases, the antennas of a base station 105 or a UE 15 may be located within one or more directional antenna networks, which may support beam formation or MIMO operation. One or more base station antennas or antenna arrays can be placed in an antenna mount, such as an antenna tower. In some cases, the antennas or antenna arrays associated with a base station 105 can be located in different geographical locations. A base station 105 can use multiple antennas or antenna arrays to conduct beamforming operations for directional communications with an UE 115.
[0089] In some cases, wireless communication system 100 may be a packet-based network, which operates
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38/104 according to a stack of layered protocols. On the user's piano, communications on the carrier or Packet Data Convergence Protocol (PDCP) layer can be IP based. A Radiolink Control (RLC) layer can, in some cases, perform the segmentation and reassembly of packets to communicate through logic channels. The Media Access Control (MAC) layer can perform the priority and multiplexing treatment of logic channels in the transport channels. The MAC layer can also use hybrid ARQ (HARQ) to provide relay at the MAC layer to improve link efficiency. At the control piano, the radio resource control protocol (RRC) layer can provide for establishing, configuring, and maintaining an RRC connection between an UE 115 and a network device 105-c, the network device 105-b, or core network 130 supporting radio bearers for user plan data. In the physical layer (PHY), transport channels can be mapped to the physical channels.
[0090] Time intervals in LTE, or NR can be expressed in multiples of a basic time unit (which can be a sampling period T _s = 1/30720000 seconds). Time resources can be organized according to radio frames 10 ms long (T _f = 307200 T _s ), which can be identified by a system frame number (SEN) ranging from 0 to 1023. Each frame can include ten Ims subframes, numbered 0 to 9. A subframe can be further divided into two .5ms partitions, each of which contains six or 7 modulation symbol periods (depending on the length of the prefixed cyclic prefix for each symbol) . When deleting the prefix
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39/104 cyclic, each symbol contains 2048 sample periods. In some cases, the subframe may be the smallest programming unit, also known as a TTI. In other cases, a TTI may be shorter than a subframe or may be selected dynamically (for example, in short TTI bursts or in selected component carriers using short TTI).
[0091] A resource element may consist of a symbol period and a subcarrier (for example, a frequency band of 15 KHz). A resource block can contain 12 consecutive subcarriers in the frequency domain and, for a normal cyclic prefix in each orthogonal frequency dimension multiplexing symbol (OFDM), 7 consecutive time domain OFDM symbols (1 partition), or 84 elements of resources. The number of bits carried by each resource element may depend on the modulation scheme (the symbol configuration that can be selected during each symbol period). Thus, the more blocks of resources a UE receives and the larger the modulation scheme, the higher the data rate can be.
[0092] The wireless communication system 100 can support operation in multiple cells or carriers, a feature that can be referred to as carrier aggregation (CA) or multi-port operation. A vehicle can also be referred to as a component carrier (CC), a layer, a channel, etc. The terms carrier, component carrier, cell, and channel can be used here interchangeably. An UE 115 can be configured with several downlink CCs and one or more CCs of downlink
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40/104 uplink for carrier aggregation. Carrier aggregation can be used with both FDD and TDD component carriers.
[0093] In some cases, the wireless communications system 100 may use enhanced component carriers (eCCs). An eCC can be characterized by one or more characteristics, including: higher bandwidth, shorter symbol duration, shorter TTIs, and modified control channel configuration. In some cases, an eCC can be associated with a carrier aggregation configuration or a dual connectivity configuration (for example, when multiple service cells have a sub-optimal or non-ideal return transport channel link). An eCC can also be configured for use on the unlicensed spectrum or shared spectrum (where more than one operator is authorized to use the spectrum). An eCC characterized by broadband bandwidth may include one or more segments that can be used by UEs 115 that are not able to monitor all bandwidth or prefer to use limited bandwidth (for example, to conserve power).
[0094] In some cases, an eCC may use a different symbol duration than other CCs, which may include the use of a reduced symbol duration compared to the symbol duration of the other CCs. The shorter symbol duration may be associated with increased subcarrier spacing. A TTI in an eCC can consist of one or more symbols. In some cases, the duration of the TTI (that is, the number of symbols in a TTI) can be variable. In some cases, an eCC may
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41/104 use a different symbol duration than other CCs, which may include using a reduced symbol duration compared to the symbol duration of the other CCs. The shorter symbol duration is associated with increased subcarrier spacing. A device, such as a UE 115 or base station 105, using eCCs can transmit broadband signals (for example, 20, 40, 60, 80 MHz, etc.) with reduced symbol durations (for example, 16.67 microseconds ). An eCC TTI can consist of one or more symbols. In some cases, the duration of TTI (that is, the number of symbols in a TTI) can be variable.
[0095] A shared radio spectrum band can be used in a shared NR spectrum system. For example, a shared NR spectrum can use any combination of licensed, shared, and unlicensed spectra, among others. The flexibility of the eCC symbol duration and subcarrier spacing can allow the use of eCC across multiple spectra. In some examples, shared spectrum NR can increase spectrum utilization and spectral efficiency, specifically through the sharing of vertical (eg, through frequency) and horizontal (eg, over time) resources.
[0096] In some cases, the wireless communications system 100 may use both licensed and unlicensed radio spectrum bands. For example, the wireless communication system 100 can employ LTE Licensed Assisted Access radio access technology
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42/104 (LTE-LAA) or Unlicensed LTE (LTE U) or NR technology in an unlicensed band, such as the Industrial, Scientific and Medical (ISM) 5GHz band. When operating in bands on the unlicensed radio frequency spectrum, wireless devices such as base stations 105 and UEs 115 can employ listen-to-speak (LBT) procedures to ensure that the channel is clean before transmitting data. In some cases, operations on unlicensed bands may be based on a CA configuration in conjunction with CCs that operate on a licensed band. Operations on the unlicensed spectrum may include downlink transmissions, uplink transmissions, or both. Duplexing in unlicensed spectrum can be based on FDD, TDD or a combination of both.
[0097] Figure 2 illustrates an example of a wireless communications system 200 that supports signaling for LLC multiplexing and sidelink communications in accordance with various aspects of the present disclosure. The wireless communications system 200 can include a base station 105-a, a sidelink UE 115-a, a sidelink UE 115-b, and a URLLCLC 115-c, which can be examples of UE 115 and the station base 105 described with reference to figure 1. The base station 105-a and UEs 115 can operate using mmW spectrum.
[0098] EU sidelink 115-a and EU sidelink 115b can communicate via sidelink communications. For example, the sidelink UE 115-a can transmit sidelink transmission 205 to the sidelink UE 115-b. In some instances, the UE 115-a may broadcast 205 sidelink transmission. In such cases, the sidelink UE
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115-a can transmit a signal (e.g., a broadcast signal) to several sidelink UEs 115, including sidelink UE 115-b. The sidelink signal can be transmitted in multiple directions, in such a way that the signal can impact communications related to base station 105-a as interference 215. Base station 105-a and UE URLLC 115-c can communicate through transmissions from URLLC. UE URLLC 115-c can send transmission of URLLC 210 to base station 105-a on the uplink. During reception of transmission from URLLC 210, communications related to base station 105-a may be subject to interference 215, due to sidelink transmission 205.
[0099] Base station 105-a can be geographically associated with UE URLLC 115-c. In such cases, base station 105-a may reserve an indication channel in downlink transmissions to transmit the presence of URLLC data or URLLC transmissions. The referral channel can include information about the presence of URLLC traffic, the location of URLLC transmission, and other information associated with URLLC. If the indicator is not detected by the UE URLLC 115-c, UE URLLC 115-c may not track or decode the sidelink channel information. Alternatively, if the indicator is detected, the UE URLLC 115-c can receive and decode the URLLC data. Likewise, if sidelink UE 115-a detects the indication, the sidelink UE 115-a can discard resources associated with URLLC data that pierce sidelink transmissions in the decryption process, instead of expending power in decoding corrupted resources , improving decoding performance and
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44/104 power in the UE 115-a.
[0100] In some examples, UE URLLC 115-c may send URLLC 210 transmission to base station 105-a on an uplink, or receive a URLLC 210 transmission on a downlink. Sidelink UE 115-a can also send sidelink 205 transmission to sidelink UE 115-b. Because the sidelink 205 transmission and the URLLC 210 transmission have different TTIs, UE URLLC 115-c can use perforation to transmit the URLLC data via uplink resources reserved for the sidelink 205 transmission. However, due to the transmission of URLLC 210 may use the resources intended for the transmission of sidelink 205, the transmission of sidelink 205 may cause interference 215 at base station 105-a. Thus, when operating in an FDD system, it may be beneficial for sidelink UE 115 to detect a subsequent URLLC stream or transmission 210, determine that drilling is occurring or may occur, and respond accordingly. Base station 105-a may not successfully receive or successfully decode the transmission of URLLC 210, and may require the UE 115-c to relay transmission of URLLC 210. Therefore, the URLLC UE 115-c may benefit from allocated resources to transmit an SR signal simultaneously with transmission of URLLC 210. In addition, when operating on a TDD system, it may be beneficial for base station 105-to identify and reserve TTIs for downlink or uplink 210 URLLC transmissions, thereby avoiding interference 215. In some cases, base station 105-a can transmit an indicator channel, allowing a TDD 115-a sidelink UE to monitor the channel, and determine
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45/104 that URLLC transmissions occur or may occur during a given TTI, and respond accordingly.
[0101] In some instances, sidelink UE 115-a may reserve uplink resources allocated for transmission of sidelink 205 for scheduling requests (SRs) during uplink puncture. When URLLC traffic is present, UE URLLC 115-c can drill through the sidelink transmission 205 to immediately transmit the URLLC data on a first transmission of URLLC 210 in a less concise manner. Sidelink UE 115-a can reserve dedicated resources on each first TTI of duration of the sidelink transmission 205 when a first transmission of URLLC 210 is detected. UE URLLC 115-c can transmit an SR on the dedicated resources reserved during the simultaneous transmission of the URLLC data. Base station 105-a can detect and decode the SR on the dedicated resource. If the first transmission fails (for example, due to interference between the transmission of perforated URLLC 210 and the transmission of perforated sidelink 205), base station 105-a can transmit a programming lease to schedule a second transmission of URLLC 210. Base station 105-a can send the programming lease over a reserved downlink indication channel in response to SR. Sidelink UE 115-a can monitor the downlink indication channel on each first duration TTI. If the retransmission schedule grant is detected, sidelink UE 115-a may suspend the ongoing sidelink transmission 205 on resources allocated for the second URLLC transmission 210 to accommodate URLLC traffic.
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46/104 [0102] In some examples, base station 105, one may have URLLC data to transmit to UE URLLC 115-c. URLLC streams may require reversing the fast hybrid acknowledgment (HARQ) retry. Upon receiving base station URLLC data 105-a, UE URLLC 115-c may need to transmit an ACK / NACK return immediately after a URLLC transmission from base station 105-a. In such cases, it may be beneficial for the sidelink UE 115-to reserve resources allocated for transmission of sidelink 205 for return ACK / NACK URLLC. UE URLLC 115-c can use these reserved resources for the return transmission of ACK / NACK, such that the response message has a high probability of being successfully received by the base station 105-a. Sidelink UE 115-a can reserve resources for ACK / NACK return transmission in a static mode, in a dynamic mode, or in a hybrid mode where sidelink UE monitors a traffic profile and determines which mode to apply during a certain period of time.
[0103] In some examples of a TDD system, base station 105-a can transmit a downlink control signal, which can identify dedicated resources for URLLC transmissions. Sidelink UE 115-a can identify dedicated resources based on the downlink control signal, and can reserve dedicated resources for URLLC traffic. In some cases, dedicated resources can be identified based on spaces in the sidelink channel. In some examples, base station 1025a can transmit an indicator channel, whose sidelink UE 115-a can monitor. When monitoring the indicator channel, the UE
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115-a can determine when URLLC traffic is occurring or will occur. If an indicator channel indicates that URLLC traffic is pending, 115-a sidelink UE transmission may be suspended during the TTI corresponding to the indicator channel. After the completion of the URLLC transmission, or after determining that no URLLC transmission is pending, the sidelink UE 115-a can resume transmissions.
[0104] Figure 3 illustrates an example of a wireless communications configuration 300 that supports signaling for LLC multiplexing and sidelink communications in accordance with various aspects of the present disclosure. In some cases, wireless communications configuration 300 may represent aspects of techniques performed by an UE 115 or base station 105 as described with reference to figures 1-2.
[0105] In some cases, resources available in a geographic sector can be allocated between downlink 305 and uplink 310. Downlink 305 can include a PDCCH 315 and a PDSCH 320. In some examples, a gNB or UE URLLC may have some data URLLC to transmit. Such transmissions can be transmitted in a less concise manner, and may require rapid HARQ inversion. URLLC transmissions may require a short transmission time in order to transmit, receive ACK / NACK feedback, and, if necessary, retransmit within a minimum period of time. For example, URLLC transmissions may correspond to a first TTI of duration 325. In some cases the first TTI of duration 325 may be a mini-partition. In such cases, the first TTI of duration 325
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48/104 can include two OFDM symbols.
[0106] If a UE URLLC is located within the same geographic sector as a base station 105 (for example, a gNB), base station 105 can assign an indication channel 330 to downlink 305. Indication channel 330 can be assigned to each first downlink 305 TTI of duration 305. For example, indication channel 330-a can be assigned to a first TTI of duration 325, indication channel 330-b can be assigned to another first TTI of duration 325, and so on. Indication channel 330 can include an indicator, which can transmit information about the presence of URLLC traffic. For example, base station 105 can transmit URLLC 335 data. URLLC 335 data can drill through resources destined for the PDSCH 320. Indication channel 330 can carry an indicator that conveys the information that URLLC 335 data is or will be transmitted. In some examples, indication channel 330-a can transmit URLLC data 335 which will be transmitted in a first TTI of subsequent duration 325 corresponding to indication channel 330-b. In other examples, indication channel 330-b can transmit that URLLC data 335 is currently being transmitted in the same first TTI of duration 325.
[0107] A UE 115 can engage in D2D communication with another 115 sidelink UE via 310 uplink. In some cases, sidelink communication may include broadcast transmissions, from a 115 sidelink UE to several 115 sidelink UEs. Sidelink UE 115 can receive a grant for sidelink 365 data via PDCCH 315. A subframe for the transmission of sidelink 365 data over
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49/104 uplink 310 can be related to a second TTI of duration 345. For example, the second TTI of duration 345 can be a partition, or it can be greater than or equal to 500 microseconds. In some examples, an uplink subframe 310 may include (RTS) 350, and a common uplink burst (UCB) 355. RTS 350 may include a group destination identifier, a transmission duration, a reference signal (RS), to allow estimation of channel and receiver throughput, and a modulation and coding scheme (MCS) indicator. UCB 355 can enable all UEs to perform an uplink report.
[0108] In some examples, a UE URLLC 115 can receive data from URLLC 335. Since URLLC data requires fast HARQ inversion, ACK / NACK feedback can be transmitted immediately after receiving URLLC 335 data. ACK feedback / NACK can be bursty and unpredictable. Thus, sidelink UE 115 can monitor indication channel 330 for the indicator. If sidelink UE 115 identifies the indicator, sidelink UE 115 can identify dedicated ACK / NACK URLLC resources 360 over uplink 310 for ACK / NACK feedback. Sidelink UE 115 can then empty the corresponding resources and reserve the resources for identified ACK / NACK URLLC for ACK / NACK return. UE URLLC 115 can receive data from URLLC 335 and transmit the ACK / NACK URLLC return via ACK / NACK URLLC 360 resources.
[0109] For example, sidelink UE 115 can monitor indication channel 330 over a period of time. Sidelink UE 115 may not identify an indicator in the 330-a indication channel. However, EU sidelink
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115 can identify an indicator on indication channel 330-b corresponding to the transmission of data from URLLC 335. Having identified the indicator, sidelink UE 115 can identify and reserve ACK / NACK URLLC resources 360-A, 360-b, 360- ce 360-d corresponding to each first TTI of duration 325 over the second TTI of duration 345. UE URLLC 115 can receive data from URLLC 335 and transmit ACK / NACK feedback using one or more ACK / NACK resources URLLC360 b. If necessary, UE URLLC 115 can transmit additional ACK / NACK feedback via reserved ACK / NACK URLLC resources 360-c or 360-d.
[0110] The static method described above of identifying, emptying, and reserving ACK / NACK URLLC 360 resources can provide a highly reliable ACK / NACK return in response to URLLC data. Multiple opportunities in multiple first TTIs of duration 325 are provided for the return transmission of ACK / NACK. However, in some cases, the sidelink UE may use a more dynamic way of reserving resources for the return of ACK / NACK.
[0111] Figure 4 illustrates an example of a wireless communications configuration 400 that supports signaling for LLC multiplexing and sidelink communications in accordance with various aspects of the present disclosure. In some cases, wireless communications configuration 400 may represent aspects of techniques performed by an UE 115 or base station 105 as described with reference to figures 1-3. While figure 3 illustrates a static method for reserving resources, wireless communications setup 400 can illustrate a
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51/104 example of a more dynamic method for reserving transmission resources for sidelink data for URLLC data.
[0112] Similar to the wireless communication configuration in figure 3, the resources available in a geographic sector can be allocated between a 405 downlink and a 410 uplink. Downlink 405 can include a PDCCH 415 and a PDSCH 420. In some examples, a gNB or a UE URLLC may have some URLLC data to transmit. In such examples, URLLC transmissions may correspond to a first TTI of duration 425, where the first TTI of duration 425 may be a minipartition consisting of two OFDM symbols similar to those in Figure 3.
[0113] If a UE URLLC is located within the same geographic sector as a base station 105 (for example, a gNB), base station 105 can assign an indication channel 430 to downlink 405 in each first TTI of duration 425 similar to indication channel described in figure 3. In some cases, base station 105 can transmit data from URLLC 435. Data from URLLC 435 can drill through resources destined for the PDSCH 420. Indication channel 430 can carry an indicator that transmits the information that data of URLLC 435 are or will be transmitted similar to the process described in figure 3.
[0114] A UE 115 can engage in communication with another sidelink UE D2D 115 via uplink 410, as described in figure 3. Sidelink UE 115 can receive a lease for sidelink data 465 via PDCCH 415. One subframe for the transmission of data from sidelink 465 to uplink 410 may correspond to a second TTI of duration 445. In some examples, a subframe for uplink
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410 may include (RTS) 450 and common uplink burst (UCB) 455, as described in figure 3.
[0115] In some examples, a UE URLLC 115 can receive data from URLLC 435. Since the URLLC data requires HARQ inversion, ACK / NACK feedback can be transmitted immediately after receiving URLLC 435 data. ACK feedback / NACK can be bursty and unpredictable. Thus, sidelink UE 115 can monitor indication channel 430 in each First TTI of duration 425 of the second TTI of duration 445 for the indicator. If sidelink UE 115 identifies the indicator, sidelink UE 115 can identify dedicated ACK / NACK URLLC resources 460 over uplink 410 for ACK / NACK feedback. ACK / NACK URLLC 460 resources may include one or more resources used for ACK / NACK feedback. Sidelink UE 115 can then empty the corresponding resources and reserve the identified ACK / NACK URLLC resources 460 for the return of ACK / NACK. UE URLLC 115 can receive data from URLLC 435 and transmit the ACK / NACK URLLC return via ACK / NACK URLLC Resources 460. In some instances, sidelink UE 115 may empty ACK / NACK URLLC 460 resources for the return of ACK / NACK in a first duration of subsequent TTI 425 which is not immediately after the first TTI of duration 425 in which the indication was detected. By using a static mode for returning ACK / NACK URLLC, UE 115 can conserve resources for the transmission of 465 sidelink data. UE 115 can also save power. UE sidelink 115 can use the static mode illustrated in figure 3 to maximize the consistency of ACK / NACK return transmissions and the opportunities for transmission
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53/104 ACK / NACK return. Or, sidelink UE 115 can use the dynamic mode illustrated in figure 4 to maximize the efficiency of the allocation of resources and power.
[0116] In some examples, sidelink UE 115 may use a hybrid mode to reserve ACK / NACK resources. Sidelink UE 115 can determine whether to reserve resources at each first TTI of duration 425 in static mode or empty resources in a first TTI of duration 425 in dynamic mode based on the amount of URLLC traffic present. Base station 105 can transmit URLLC data unpredictably. In some cases, URLLC traffic may be more constant. By reserving a resource on each first TTI of duration 425, UE sidelink 115 and UE URLLC 115 can guarantee that the ACK / NACK return is transmitted. In other cases, URLLC traffic may be in bursts, and sidelink UE 115 may not need to reserve a resource for each first TTI of duration 425, thus using more resources for efficient sidelink transmissions. In such cases, sidelink UE 115 can dynamically deplete resources from ACK / NACK URLLC 460 for return of ACK / NACK. Base station 105 can choose one mode or the other. Alternatively, the base station 105 can monitor the amount of traffic, traffic rate, traffic constancy, signal quality, etc., and can switch between the two methods based on at least the monitored data.
[0117] UE sidelink can engage in signaling for multiplexing (e.g. signaling for sidelink / URLLC multiplexing) as discussed above with reference to figures 3-4, when a base station 105 transmits data
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URLLC for a UE URLLC 115. Additional schemes are used, however, when a UE URLLC 115 pierces continuous sidelink data transmissions with URLLC data to a base station.
[0118] Figure 5 illustrates an example of a wireless communications configuration 500 that supports signaling for LLC multiplexing and sidelink communications during uplink drilling in accordance with various aspects of the present disclosure. Wireless communications configuration 500 can support signaling for Sidelink / URLLC when drilling occurs on resources allocated for uplink communication. In some cases, wireless communications of configuration 500 may represent aspects of techniques performed by an UE 115 or base station 105, as described with reference to figures 1-4.
[0119] In some cases, resources available in a geographic sector can be allocated between downlink 505 and uplink 510. Downlink 505 may include a PDCCH 515 and a PDSCH 520. In some cases, base station 105 and UE URLLC 115 may have some URLLC data to be transmitted. URLLC streams may correspond to a first TTI of duration 525. In some cases the first TTI of duration 525 may be a mini-partition. In such cases, the first TTI of duration 525 may include two OFDM symbols.
[0120] If a UE URLLC is located within the same geographic sector as a base station 105 (for example, a gNB) the base station 105 can assign a 505 downlink indication channel 530. For example, indication channel 530-a can be assigned to a first TTI of
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55/104 duration 525, indication channel 530-b can be assigned to a first TTI of duration 525, and so on. Indication channel 530 Indication channel 530 can include an indicator, which can transmit information about the presence of URLLC traffic. The indication channel 530 can also carry a programming concession.
[0121] A UE 115 can engage in D2D communication with another 115 sidelink UE via 510 uplink. In some cases, sidelink communication may include broadcast transmissions, from a 115 sidelink UE to several UEs of sidelink 115. UE of sidelink 115 can receive or identify a concession for a data transmission via URLLC PDCCH 315. A subframe for the transmission of data from URLLC 540 over uplink 510 can correspond to a second TTI of duration 545. For example , the second TTI of duration 545 can be a partition, or it can be greater than or equal to 500 microseconds. In some examples, an uplink subframe 510 may include (RTS) 550, and a common uplink burst (UCB) 555. RTS 550 may include a group destination identifier, a transmission duration, an RS in order to allow estimation channel and receiver yield, and an MCS indicator. UCB 555 can allow all UEs to run an uplink report.
[0122] In some examples, a UE URLLC 115 may have URLLC 535 data to transmit to a base station. The UE URLLC can drill through the resources allocated for 565 sidelink data to immediately transmit the 535 URLLC data in a first uplink transmission in a less concession way. In some cases,
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56/104 sidelink 565 may cause some interference at base station 105, and may be beneficial in relaying URLLC 535 data in a second uplink transmission. Sidelink UE 115 can reserve dedicated SR resources 560 for transmission of an SR. In some instances, sidelink UE 115 may reserve one or more SR 560 resources in each first TTI of duration 525 after the transmission of URLLC 535 data in a first transmission. UE URLLC 115 can transmit an SR on the reserved SR resources 560-a, at the same time (in some cases) transmitting the URLLC 535 data. Base station 105 can detect and decode the RS on the SR resources dedicated 560. If the first transmission fails (for example, due to interference between perforated URLLC data 535 and perforated sidelink data 565), base station 105 can transmit an indicator over indication channel 530 including a programming concession to schedule a second transmission in response to SR. UE URLLC 115 can receive the programming lease and retransmit data from URLLC 540 in a second later transmission. In some examples, URLLC 540 data may be the same as URLLC 535 data. In other examples, URLLC 540 data may be different from URLLC 535 data. Sidelink UE 115 can monitor referral channel 530 on each first TTI of duration 525. If the retransmission schedule grant is detected on indication channel 530, sidelink UE 115 may suspend sidelink transmissions in progress on resources allocated for the second transmission to accommodate URLLC traffic.
[0123] For example, the sidelink UE 115 can
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57/104 monitor indication channel 530-a and not detect a retransmission schedule concession or an indicator. However, the sidelink UE 115 can identify an indicator on referral channel 530-b, indicating the presence of URLLC data, and can reserve SR 560 resources. In some instances, when transmitting URLLC 535 data on a first transmission, UE URLLC 115 can transmit an SR via reserved SR resources 560-a. In other examples, after or before transmitting data from URLLC 535 in a first transmission, UE URLLC 115 may transmit an SR via reserved SR resources 560-a. URLLC 535 data cannot be successfully received or decoded by base station 105, and base station 105-a can transmit an indicator including a retransmission schedule request on indication channel 530-c. The grant of relay scheduling may indicate resources for relaying URLLC data (for example, URLLC 540 data). Sidelink UE 115 can detect the granting of relay scheduling and temporarily suspend the transmission of sidelink data 565 in the resources allocated for relaying URLLC data.
[0124] Figure 6 illustrates an example of a subframe 600 for signaling to communicate LLC and sidelink communications in TDD systems in accordance with various aspects of the present disclosure. Subframe 600 can include communications between a base station 105, a sidelink UE 115, and a UE LCC (for example, URLLC) 115, which may be examples of or that may represent aspects of techniques performed by a UE 115 or base station 105 how
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58/104 described with reference to figures 1-5. Subframe 600 may include the reservation of TTIs LLC.
[0125] In some cases, a wireless communications system may allocate resources according to a TDD scheme. For example, a subframe 600 can use individual TTIs (for example, symbols) to transmit or receive different signals. In one example, a subframe can include symbols reserved for a PDCCH 605, DSS 610, STS 620, DRS 625, PSHICH 630 and Explosion UL 635. Other available resources may be intended for sidelink traffic on PSSCH 640.
[0126] In some cases, a base station 105 can transmit URLLC data to a UE URLLC. Alternatively, a UE URLLC may have URLLC data to transmit to the base station. In such examples, base station 105 may identify resources for LLC broadcasts, such as resources from LLC 615. Base station 105 may include an indication of resources reserved on a downlink control channel, such as PDCCH 605. An UE of sidelink can identify reserved LLC resources 615 based on received PDCCH 605. During reserved LLC resources 615, sidelink UE 115 can suspend sidelink communication on PSSCH 640. A UE URLLC 115 can transmit uplink URLLC traffic or receive downlink URLLC traffic on LLC 615 resources.
[0127] In some cases, a base station 105 or a UE 115 may determine the identify and capabilities of LLC 615 based on the duration of URLLC traffic requirements. For example, where URLLC access corresponds to a short duration (for example, one or two symbols), the base station
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105 or an EU 15 can proceed to reserve LLC 615 resources.
[0128] In some instances, an UE 115 may identify and reserve LLC 615 resources based at least in part on spaces in sidelink signaling. That is, PSSCH 640 can include features scheduled for sidelink communications, and can include spaces allocated between transmissions. For example, a gap may exist between DSS 610 and STS 615. Thus, when base station 105 indicates the resources reserved for LLC traffic on the PDCCH 605, a sidelink UE 115 can identify and reserve resources of LLC 615-a in space between DSS 610 and STS 615. When programming reserved LLC resources 615, a base station 105 and UE 115 can avoid a scenario in which URLLC transmissions are not successfully received or decoded due to interference from sidelink transmissions over the same features. In addition, through the use of openings in sidelink traffic, a sidelink UE 115 can reduce the impact of LLC traffic on PSSCH 640. Such spaces can be identified at various locations within the subframe, and can be used to identify and reserve LLC 615-b features, LLC 615-c features, and LLC 615-d features.
[0129] In some instances, the LLC resource reservation scheme can be used on systems where LLC traffic is common, occurs regularly, or occurs in transmissions with a duration of no more than two symbols. Alternatively, in scenarios where LLC traffic is more in bursts, or has a longer duration (for example, more than two symbols) a different scheme
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60/104 can be used.
[0130] Figure 7 illustrates an example of a subframe 700 for LLC signaling and sidelink communications in TDD systems in accordance with various aspects of the present disclosure. Subframe 700 can include communications between a base station 105, a sidelink UE 115, and a UE LCC (for example, URLLC) 115, which may be examples of or that may represent aspects of techniques performed by a UE 115 or base station 105 as described with reference to figures 1-6. Subframe 700 can include an indicator channel and corresponding reserved resources.
[0131] In some cases, a wireless communications system may allocate resources according to a TDD scheme, in which a subframe 700 can use individual TTI (for example, symbols) to transmit or receive different signals. Likewise for the subframe structure shown in figure 6, a subframe 799 can include symbols reserved for PDCCH 705, DSS 710, STS 720, PSHICH 730 and bursts of UL 735. Other available resources may be allocated to PSSCH sidelink traffic. 750.
[0132] In some cases, a base station 105 can transmit URLLC data to a UE URLLC. Alternatively, a UE URLLC may have URLLC data to transmit to the base station. In some cases, LLC broadcasts may be long-lived (for example, more than two symbols) or may be bursts naturally. In such cases, the reserve of the regular explicit symbol reserve may have a high overhead. Instead, a channel indicator 740 can be reserved.
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61/104 [0133] Channel indicator 740 can carry a replacement signal in the event that an LLC transmission is imminent. A sidelink UE 115 can defer the resources of a given TTI (e.g., symbol) corresponding to an indicator channel. For example, a sidelink UE 115 may determine not to transmit during sidelink resources 745 that correspond to indicator channel 740-c.
[0134] Sidelink channel transmissions may include sufficient switching time before each indicator channel to allow reception of 740 indicator channel. If an indicator channel indicates LLC transmissions, then corresponding sidelink channel resources are depleted at to avoid interference with LLC broadcasts. Alternatively, if there are no LLC transmissions indicated on indicator channel 740, then a sidelink UE 115 can resume transmissions on the following symbols. For example, if a sidelink UE 115 monitors indicator channel 740-b and determines that LLC 715 data must be transmitted by a base station 105 to a UE URLLC 115, then sidelink UE 115 will cease transmissions during the symbols corresponding to the data of LLC 715. EU sidelink 115 will continue to monitor, and will cease transmissions during resources 745 to monitor indicator channel 740-c. Upon determining that there is no LLC data to be transmitted, sidelink UE 115 will resume communications during the PSHICH 730 symbol, and will transmit a burst of UL 735.
[0135] Figure 8 illustrates an example of a process flow 800 for signaling LLC and sidelink communication in TDD systems according to various aspects of
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62/104 present disclosure. Process flow 800 may include base station 105-b, sidelink UE 115-d, and URLLCLC UE 115-e, which may be examples of or may represent aspects of techniques performed by a UE 115 or base station 105 such as described with reference to figures 1-7. Process flow 800 may include transmitting URLLC data from base station 105-b, identifying dedicated resources for LLC communication, and reserving dedicated resources.
[0136]
At 805-a and 805-b the base station 105-c can transmit a downlink communication. In some examples, UE 105-c can transmit downlink communication so that all UEs 115, including sidelink UE 115-d and UE URLLC 115-p, receive the downlink control signal. Alternatively, the base station 105c can transmit the downlink control signal individually to the UE 15-fd and UE 115-e. In some instances, the downlink communication may be a PDCCH, and may have a first TTI of duration (for example, one or more symbols). Downlink communication can include information identifying dedicated resources on a sidelink channel for low latency communications (for example, URLLC traffic), URLLC traffic can use a TTI that is shorter than the TTI of the control signal downlink (for example, a partition or a mini-partition).
[0137] At 810 a 115-d sidelink UE can receive an 805-a wireless downlink communication. UE 115-d can identify dedicated resources on the sidelink channel for conducting D2D wireless communications using the second duration TTI (for example, transmissions from
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63/104 sidelink data). Wireless downlink communication 805-a can be received on a channel from a downlink control frame, a subframe or a partition that corresponds to the dedicated resources.
[0138] In some examples, UE 115-d may determine that communications having the first TTI (URLLC traffic) will use two or less first TTIs in duration, and may identify resources based on them. In some examples, the dedicated resources identified can be determined based on regular intervals on the sidelink channel. That is, the UE 105-d or UE 115-d can identify spaces programmed in the sidelink channel, and can identify dedicated resources based on the location of the spaces. For example, the dedicated resources on the sidelink channel can be identified as being immediately after the spaces. In some examples, UE 115-d can identify a TDD pattern, and can determine whether the URLLC traffic is uplink traffic or downlink traffic based at least in part on the identified TDD pattern.
[0139] In 815, the 115-d sidelink UE can reserve transmission resources having the first duration TTI. For example, transmissions with the first TTI may be URLLC traffic. At 820, UE URLLC 115-e can transmit URLLC data to base station 105-b, using reserved dedicated uplink resources.
[0140] Figure 9 illustrates an example of a 900 process flow for signaling LLC and sidelink communications in TDD systems in accordance with various aspects of the present disclosure. Process flow 900 can include
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64/104 base station 105-c, sidelink UE 115-f, and UE URLLC 15-g, which can be examples of or which can represent aspects of techniques performed by a UE 115 or base station 105 as described with reference to the figures 1-8. Process flow 900 may include the transmission of LLC data and an indicator channel from base station 105-c, identifying dedicated resources for LLC communication, and reserving dedicated resources.
[0141] EM 905, base station 105-c can transmit data from URLLC to UE URLLC 115-g. In addition, base station 105-c can transmit an indicator associated with wireless communications having a first TTI of duration (e.g., URLLC traffic).
[0142] In 910 UE 115-f you can identify the indicator associated with URLLC traffic during the performance of D2D wireless communications on a sidelink channel used for second duration TTI transmissions (sidelink transmissions). First duration TTI can be shorter than second duration TTIs.
[0143] In 915, UE 115-f can identify dedicated resources on the sidelink channel for low-latency communications (URLLC communications) based at least in part on the identification of the indicator. In some cases, base station 105-c or EU 115-g may determine that LLC traffic will use more than the first two duration TTIs, and may identify the indicator based on the determination. In 920, the UE 115-f may suspend sidelink communications on the sidelink channel during the resources identified in 915.
[0144] In 925, the UE URLLC 115-g can receive
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65/104 URLLC data. Alternatively, the UE 115-g can transmit URLLC data (not shown). In some examples, UE llt-g can identify a TDD pattern, and can determine whether LLC traffic is uplink or downlink traffic based at least in part on the given pattern. In 930, the sidelink UE 115-f can determine that the URLLC transmissions on the identified resources has been carried out, and can resume sidelink communication on the sidelink channel.
[0145] Figure 10 illustrates an example of a process flow 1000 for signaling for LLC multiplexing and sidelink communications in accordance with various aspects of the present disclosure. Process flow 1000 can include base station 105-d, sidelink UE 115-h, and UE URLLC 115-1, which can be examples of or which may represent aspects of techniques performed by a UE 115 or base station 105 as described with reference to figures 1-9. Process flow 1000 can include the transmission of base station URLLC data 105-d, reserving resources on sidelink transmissions by sidelink UE 115-h, and the transmission of an ACK / NACK return by UE URLLC 115-e.
[0146] Base station 105-d can send a first transmission from URLLC 605 to UE URLLC 115-e. The first transmission of URLLC 1005 can drill resources destined for the PDSCH. Base station 105-b can reserve an indication channel in downlink transmissions to carry the presence of URLLC data. The base station 105-d can assign the indication channel to the first duration TTI. The first duration TTI can include two symbols (for example, a minipartition) in downlink transmissions, and in some examples the 105-d base station can
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66/104 assign the indication channel to the first of the two symbols. Base station 105-d can transmit the indication channel on each first successive duration TTI. The referral channel can include an indicator comprising information about the presence of URLLC traffic, the location of URLLC transmission, and other information associated with URLLC. Base station 105-d may require UE URLLC 115-e to transmit an ACK / NACK message immediately after the first transmission of URLLC 1005.
[0147] In block 1010, the sidelink UE 115-d can identify the indicator transmitted by the base station 105-d carrying the presence of URLLC 1005 transmission. The indicator can be associated with a first duration TTI (for example, a minipartition), while the 115-h sidelink UE can perform D2D wireless communications with other 115 sidelink UEs on the sidelink channel using a partition that is greater than or equal to 500 microseconds. The partition can include a second TTI of duration. The first duration may be shorter than the second duration TTI. Sidelink UE 115-d can monitor the referral channel for a plurality of successive first TTIs of duration to identify a presence of URLLC data (e.g., low latency traffic). Additionally, sidelink UE 115-d can monitor the indication channel on each first duration TTI in a plurality of successive first TTIs to determine a traffic profile for the URLLC data. The traffic profile can include at least one of the group that includes a traffic rate, a level of traffic that requires reliability, and a quantity of URLLC traffic over a period of
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67/104 time.
[0148] In block 1015, the 115-h sidelink UE can identify the dedicated uplink resources for the ACK / NACK return based at least in part on the indicator identification in block 610. 115-d sidelink UE can monitor the base station indication channel 105-b.
[0149] In block 1020, the 115-h sidelink UE can reserve the dedicated uplink resources identified from block 1015 for an ACK / NACK return transmission to the 105-d base station. UE of sidelink 115-e can determine the use of a first mode or a second mode in reserving the dedicated uplink resources based on the traffic profile determined in block 1010. The first mode can include the reservation of resources in each first TTI of duration in a plurality of successive first TTIs as described in figure 3. The second mode may include reserving resources from a first individual duration TTI, as described in figure 4. The first individual duration TTI may include a subset of the first TTIs duration in a plurality of successive first duration TTIs. Sidelink UE 115-e can determine the subset based on monitoring the referral channel by identifying the presence of URLLC data. Sidelink UE 115-e can empty certain reserved dedicated uplink resources. Sidelink UE 115-e can empty at least one of the first duration TTI into the plurality of successive first TTIs. Sidelink UE 115-e can decide which first duration TTI to empty based at least in part on the presence of URLLC data identified from the monitoring of the channel
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68/104 indication.
[0150] In block 1025, UE URLLC 115-e can receive URLLC data from URLLC1005 transmission. URLLC data can include a wireless downlink communication having a first TTI of duration. In block 1030, UE URLLC 115-e can identify uplink resources
dedicated in a channel sidelink to the return in ACK / NACK. The resources dedicated uplink can to be based fur less in party on receipt the data in
URLLC in block 1025. In addition, the dedicated uplink resources may be similar to the dedicated uplink resources identified in block 1015 and reserved in block 1020 by 115 sidelink UE. The sidelink channel can use a second duration TTI, where the first duration TTI is shorter than the second duration TTI.
[0151] UE URLLC 115-i can transmit the ACK / NACK 1035 return to the base station 105-b. UE URLLC 115-i can transmit the ACK / NACK 1035 return using the reserved dedicated uplink resources determined from block 1020. Dedicated uplink resources can include resources emptied from block 1020.
[0152] Figure 11 illustrates an example of a process flow 100 for signaling for LLC multiplexing and sidelink communications in accordance with various aspects of the present disclosure. Process flow 1100 can include base station 105-e, sidelink UE 115-j, and URLLCLC UE 115-k, which can be examples of or which may represent aspects of techniques performed by a UE 115 or base station 105 as described with reference to figures 1-10. Process flow 1100 may include the reservation of
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69/104 features in sidelink transmissions by the 115-j sidelink UE, a URLLC and SR data transmission from the UE URLLC 115-j, and a failure indicator transmission and programming concession by the base station 105e.
[0153] In block 1105, sidelink UE 115-j can identify an indicator transmitted by base station 105 and carry the presence of URLLC traffic. The indicator can be associated with a first duration TTI (for example, a minipartition), while the sidelink UE 115-j can perform D2D wireless communications with other sidelink UEs 115 on the sidelink channel using a partition that is larger than than or equal to 500 microseconds. The partition can include a second TTI of duration. The first duration may be shorter than the second duration TTI.
[0154] In block 1110, sidelink UE 115-f can identify the dedicated uplink resources for scheduling requests (SRs). In block 715, the sidelink UE 115-j can reserve the dedicated uplink resources identified from a block 110 for a transmission of SRs. Dedicated uplink features can include a first lifetime TTI on the sidelink channel. In some instances, dedicated uplink resources may include a resource in each first TTI of duration (for example, a mini-partition) in a plurality of successive first TTIs. In some examples, the dedicated uplink resources may include a resource in a first, individual duration TTI. The first individual duration TTI may include a subset of the first duration TTIs in a plurality of successive first duration TTIs.
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70/104 [0155] UE URLLC 115-k can send transmission from URLLC 1120 to base station 105-c. Transmission of URLLC 1120 may include low latency communication. UE URLLC 115-g can send transmission of URLLC 1120, before receiving a programming lease. Transmission of URLLC 1120 can have a first TTI of duration on a sidelink channel. The sidelink channel can be configured to have a second duration TTI, where the first duration TTI is shorter than the second duration TTI. Transmission of URLLC 1120 can pierce sidelink channel communications.
[0156] In block 1125, UE URLLC 115-k can identify dedicated uplink resources reserved for SRs from blocks 710 and 715. UE URLLC 115-k can send an SR 1130 transmission to base station 105-e. UE URLLC 115-g can send SR 1130 transmission using the dedicated uplink resources identified in block 125. In block 11135, base station 105-e can receive and detect URLLC 1120 transmission and SR 1130 transmission. The base station 105-e may not receive the URLLC 1120 transmission correctly due to interference between the data and the URLLC data drilled in the sidelink channel.
[0157] If the 105-e base station fails to decode or receive the URLLC data correctly, the 105-e base station can send a 740-a transmit fault schedule and transmission schedule to the UE URLLC 115-g via of an indicator channel. Base station 105-e can also transmit fault indicator and 1140-b programming grant transmission to UE from
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71/104 sidelink 115-j through an indicator channel. In some examples, the 105-e base station may broadcast a broadcast grant indicator and schedule (a grant schedule broadcast and indicator combining the 1140-a schedule grant indicator and broadcast and schedule grant broadcast 1140-b) in the indication channel in such a way that both sidelink UE 115-je UE URLLC 115-k can receive the indicator and programming grant by monitoring the indication channel. In block 1145, UE URLLC 115-k can receive the 1140 programming grant failure and transmission indicator. UE URLLC 115-k can receive the failure and programming grant indicator during the same transmission.
[0158] In block 1150, the sidelink UE 115-j can monitor a base station indication channel 105-e in each first TTI of duration in a plurality of successive first TTIs. In block 1155, the sidelink UE 115-j can suspend the ongoing sidelink traffic if a programming concession is detected during the monitoring of the indication channel in block 150. Sidelink UE 115-j can suspend the continuous sidelink traffic during a first TTI of individual duration in the plurality of successive first TTIs. The first individual duration TTI can include a next first duration TTI in the plurality of successive first TTIs. Sidelink UE 115-j can suspend sidelink traffic based on detecting schedule concession.
[0159] UE URLLC 115-k can send a URLLC 1160 retransmission to base station 105-e.
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Retransmission of URLLC 1160 can have a first TTI of duration. UE URLLC 115-k can send the URLLC 1160 retransmission based at least in part on the programming grant received in block 1145.
[0160] Figure 12 shows a block diagram 1200 of a wireless device 1205 that supports signaling for multiplexing sidelink communication and low latency communications according to aspects of the present disclosure. Wireless device 1205 can be an example of aspects of user equipment (UE) 115 as described herein. The wireless device 1205 can include receiver 1210, communications manager 1215, and transmitter 1220. The wireless device 1205 can also include a processor. Each of these components can be in communication with each other (for example, through one or more buses).
[0161] 1210 receivers can receive information, such as packets, user data, or control information associated with various information channels (for example, control channels, data channels, and information related to signaling for multiplexing data communication. low latency and sidelink communications, etc.). The information can be transmitted to the other components of the device. The receiver 1210 can be an example of aspects of the transceiver 1535 described with reference to figure 15. The receiver 1210 can use a single antenna or a set of antennas.
[0162] Communications manager 1215 can be an example of aspects of communications manager 1515 described with reference to figure 15.
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73/104 [0163] Communications manager 1215 and / or at least some of its various subcomponents can be implemented in hardware, software run by a processor, firmware, or any combination of these. If implemented in software run by a processor, the functions of the communications manager 1215 and / or at least some of its various subcomponents can be performed by a general purpose processor, a digital signal processor (DSP), an application integrated circuit (ASIC), a field programmable gate arrangement (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in this description. The communications manager 1215 and / or at least some of its various subcomponents can be physically located in various positions, including being distributed so that portions of functions are implemented in different physical locations by one or more physical devices. In some instances, communications manager 1215 and / or at least some of its various subcomponents may be a separate and distinct component according to various aspects of the present disclosure. In other examples, the communications manager 1215 and / or at least some of its various subcomponents can be combined with one or more other hardware components, including, but not limited to, an I / O component, a transceiver, a network, another computing device, one or more other components described in this disclosure, or a combination thereof in accordance with
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74/104 various aspects of this disclosure.
[0164] Communications manager 1215 can identify an indicator associated with wireless communications having a first duration TTI on a sidelink channel while conducting D2D wireless communications on the sidelink channel using a second duration TTI, where the first duration TTI is shorter than the second duration TTI, receiving a wireless downlink communication having the first duration TTI, in which the wireless downlink communication is received according to an FDD configuration, identifying resources dedicated uplink to return confirmation / negative confirmation (confirmation (ACK) / negative confirmation (NACK)) based on indicator identification, receive wireless downlink communication, or both, and reserve dedicated uplink resources for transmission of return of ACK / NACK to a base station. The communications manager 1215 can also perform wireless uplink communications having a first duration TTI on a sidelink channel, the sidelink channel also configured for wireless communications having a second duration TTI, where the first duration TTI is shorter than the second duration TTI, identify an indicator associated with wireless uplink communications, identify dedicated uplink resources for programming requests (SRs) for wireless uplink communication having the first duration TTI on the sidelink channel , reserve the dedicated uplink resources for an SR transmission for wireless uplink communications having the first duration TTI, and transmit an SR to a base station using the dedicated uplink resources
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75/104 on the sidelink channel. The communications manager 1215 can also receive a wireless downlink communication according to a TDD configuration, identify dedicated resources for transmission having a first duration TTI on a sidelink channel based on receiving the wireless downlink communication, where the channel sidelink is for conducting D2D wireless communications using a second TTI of duration, and where the first TTI of duration is less than the second TTI of duration, and reserve the dedicated resources for transmissions having the first TTI. Communications manager 1215 can also identify an indicator associated with wireless communications having a first duration TTI on a sidelink channel while running D2D wireless communications on a sidelink channel using second duration TTI transmissions, where the first TTI duration is less than the second duration TTI, identify dedicated resources on the sidelink channel for low latency communications based on the indicator identification, and suspend sidelink communications on the sidelink channel during the identified resources.
[0165] The 1220 transmitter can transmit signals generated by other components of the device. In some examples, transmitter 1220 can be placed with a receiver 1210 in a transceiver module. For example, transmitter 1220 can be an example of aspects of transceiver 1535 described with reference to figure 15. Transmitter 1220 can use a single antenna or a set of antennas.
[0166] Figure 13 shows a block diagram
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1300 from a wireless device 1305 that supports signaling for multiplexing sidelink communications and low latency communication in accordance with aspects of the present disclosure. The wireless device 1305 can be an example of aspects of a wireless device 1205 or a UE 115 as described with reference to figure 12. The wireless device 1305 can include receiver 1310, communications manager 1315, and transmitter 1320. The device wireless 1305 may also include a processor. Each of these components can be in communication with each other (for example, through one or more buses).
[0167] 1310 receivers can receive information, such as packets, user data, or control information associated with various information channels (for example, control channels, data channels, and information related to signaling for multiplexing data communication. low latency and sidelink communications, etc.). The information can be transmitted to the other components of the device. The receiver 1310 can be an example of aspects of the transceiver 1535 described with reference to figure 15. The receiver 1310 can use a single antenna or a set of antennas.
[0168] Communications manager 1315 can be an example of aspects of communications manager 1515 described with reference to figure 15. Communications manager 1315 may also include indicator component 1325, reserve component 1330, return component 1335, component of SR 1340, TDD 1345 configuration component, identification component 1350, and suppression component 1355.
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77/104 [0169] Indicator component 1325 can identify an indicator associated with wireless communications having a first TTI of duration on a sidelink channel while conducting D2D wireless communications on the sidelink channel using a second TTI of duration, where the first duration TTI is shorter than the second duration TTI, monitoring, during a first period, a downlink indication channel in each first duration TTI in a set of successive first TTIs for low latency communication information, identify an indicator associated with wireless uplink communications, and receive a transmission failure indicator in response to transmitting low latency communication. In some cases, the indicator includes a presence of low-latency communication traffic, a location of a low-latency communication UE, other information associated with low-latency communication, or a combination thereof. In some cases, wireless downlink communication having the first TTI of duration includes low latency communication data.
[0170] The reserve component 1330 can receive a wireless downlink communication having the first duration TTI, where the wireless downlink communication is received according to an FDD configuration, reserve the dedicated uplink resources for a return transmission of ACK / NACK to a base station, reserve dedicated uplink resources for transmitting SRs for wireless uplink communications with first duration TTI, reserve dedicated uplink resources including emptying at least one sidelink data transmission resource
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78/104 scheduled, determine if a low latency communication traffic profile during the first period is above a monitoring based threshold, where reserving dedicated uplink resources for ACK / NACK return transmission includes reserving uplink resources dedicated using a first or second mode based on determination and reserving dedicated resources for transmissions having the first TTI. In some cases, dedicated uplink resources include a resource in a subset of the first duration TTIs in a set of successive first TTIs. In some cases, the subset of the first duration TTIs is a first individual duration TTI in the set of first successive TTIs. In some cases, the first mode includes reserving a resource in each first TTI of duration in the set of first successive TTIs. In some cases, the second mode includes reserving a resource in a next first duration TTI in the set of first successive TTIs. In some cases, dedicated uplink resources include a resource on each first duration TTI in a set of successive first TTIs. In some cases, dedicated uplink resources include a resource on each first duration TTI in a set of successive first TTIs. In some cases, the dedicated uplink resources include a resource in a subset of the first duration TTIs in a set of successive first TTIs. In some cases, the transmission failure indicator and the programming grant are received during the same transmission. In some cases, a low-latency communication traffic profile includes at least one of the group including a fee
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79/104 traffic, a level of reliability requirement traffic and a quantity of URLL traffic over a period of time.
[0171] The 1335 feedback component can identify the dedicated uplink resources for negative acknowledgment / confirmation (ACK / NACK) based on the indicator identification, receive wireless downlink communication, or both, perform uplink communications without wire having a first duration TTI on a sidelink channel, the sidelink channel also configured for wireless communications having a second duration TTI, where the first duration TTI is shorter than the second duration TTI, and identifying the dedicated uplink features for programming requests (SRs) for wireless uplink communication having the first lifetime TTI on the sidelink channel.
[0172] The SR 1340 component can transmit an SR to a base station, using the dedicated uplink resources on the sidelink channel.
[0173] The TDD 1345 configuration component can receive a wireless downlink communication according to a TDD configuration, determine which low latency communications will use two or less first TTIs of duration, determine which low latency communication will use more of the first two duration TTIs, where the indicator identification is based on the determination, determine whether the low latency traffic is uplink traffic or downlink traffic, based on the identified TDD standard, and resume sidelink communications over the communication channel. sidelink after performing one or more
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80/104 low latency transmissions. In some cases, wireless downlink communication is received on a downlink control channel of a frame, a subframe, or a partition corresponding to the dedicated resources.
[0174] The identification component 1350 can identify spaces programmed in the sidelink channel, where the identification of dedicated resources is based on the programmed spaces identified, identify dedicated resources for transmission with a first duration TTI on a sidelink channel based on the receipt of the wireless downlink communication, where the sidelink channel is for performing D2D wireless communications using a second TTI of duration and where the first TTI is less than the second TTI, determine whether low latency traffic is uplink traffic or traffic downlink, based on the identified TDD standard, identify an indicator associated with wireless communications having a first TTI of duration on a sidelink channel while performing wireless D2D communications on a sidelink channel using transmissions of a second TTI of duration, where the first duration TTI is shorter than the second duration TTI, and identify dedicated resources on the sidelink channel for low latency communications based on indicator identification. In some cases, the identification of dedicated resources includes: identification of a TDD standard. In some cases, identifying dedicated resources includes: identifying a TDD standard.
[0175] Suppression component 1355 can suspend sidelink communications on the sidelink channel during identified resources.
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81/104 [0176] The 1320 transmitter can transmit signals generated by other components of the device. In some examples, the 1320 transmitter can be colocalized with a 1310 receiver on a transceiver module. For example, transmitter 1320 can be an example of aspects of transceiver 1535 described with reference to figure 15. Transmitter 1320 can use a single antenna or a set of antennas.
[0177] Figure 14 shows a block diagram 1400 of a communications manager 1415, which supports signaling for multiplexing low latency communication and sidelink communications, in accordance with aspects of the present disclosure. Communications manager 1415 can be an example of aspects of a communications manager 1215, a communications manager 1315, or a communications manager 1515 described with reference to figures 12, 13, and 15. Communications manager 1415 may include a component indicator 1420, reserve component 1425, return component 1430, component SR 1435, configuration component TDD 1440, identification component 1445, suppression component 1450, monitoring component 1455, and component LLC 1460. Each of these modules can communicate directly or indirectly with each other (for example, through one or more buses).
[0178] Indicator component 1420 can identify an indicator associated with wireless communications having a first duration TTI on a sidelink channel while performing D2D wireless communications on the sidelink channel using a second duration TTI, where the
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82/104 first duration TTI is shorter than the second duration TTI, monitoring, during a first period, a downlink indication channel in each first duration TTI in a set of successive first TTIs for low communication information latency, identify an indicator associated with wireless uplink communications, and receive a transmission failure indicator in response to transmitting low latency communication. In some cases, the indicator includes a presence of low-latency communication traffic, a location of a low-latency communication UE, other information associated with low-latency communication, or a combination thereof. In some cases, wireless downlink communication having the first TTI of duration includes low latency communication data.
[0179] The reserve component 1425 can receive a wireless downlink communication having the first TTI of duration, where the wireless downlink communication is received according to an FDD configuration, reserve the dedicated uplink resources for a return transmission of ACK / NACK to a base station, reserving dedicated uplink resources for a transmission of SRs for wireless uplink communications having the first duration TTI, reserving dedicated uplink resources includes emptying at least one resource of data transmissions from programmed sidelink, determine if a low latency communication traffic profile during the first period is above a threshold based on monitoring, where reserving the dedicated uplink resources for ACK / NACK return transmission includes reserving the
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83/104 dedicated uplink using a first or second determination-based mode, and reserve dedicated resources for transmissions having the first TTI. In some cases, dedicated uplink resources include a resource in a subset of the first TTIs of duration in a set of successive first TTIs. In some cases, the subset of the first duration TTIs is a first individual duration TTI in the set of successive first TTIs. In some cases, the first mode includes reserving a resource in each first TTI of duration in the set of successive first TTIs. In some cases, the second mode includes reserving a resource in a next first TTI of duration in the set of successive first TTIs. In some cases, dedicated uplink resources include a resource in each first TTI of duration in a set of successive first TTIs. In some cases, dedicated uplink resources include a resource in each first TTI of duration in a set of successive first TTIs. In some cases, dedicated uplink resources include a resource in a subset of the first TTIs of duration in a set of successive first TTIs. In some cases, the transmission failure and programming grant indicator are received during the same transmission. In some cases, a low-latency communication traffic profile includes at least one of the group that includes a traffic rate, a level of reliability requirement traffic, and a quantity of URLLC traffic over a period of time.
[0180] The 1430 feedback component can identify the dedicated uplink resources for feedback
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84/104 confirmation / negative confirmation (ACK / NACK) based on the indicator identification, receive wireless downlink communication, or both, perform wireless uplink communications having a first duration TTI on a sidelink channel, the channel sidelink also configured for wireless communications having a second duration TTI, where the first duration TTI is shorter than the second duration TTI, and identify the dedicated uplink resources for programming requests (SRs) for communication of wireless uplink having the first lifetime TTI on the sidelink channel.
[0181] The SR 1435 component can transmit an SR to a base station, using the dedicated uplink resources on the sidelink channel.
[0182] The TDD component configuration 1440 can receive a wireless downlink communication according to a TDD configuration, determine that low latency communications will use two or less first TTIs of duration, determine that low latency communication will use more of the first two duration TTIs, where the indicator identification is based on the determination, determine whether the low latency traffic is uplink traffic or downlink traffic, based on the TDD standard identification, and resume sidelink communications over the communication channel. sidelink after performing one or more low latency transmissions. In some cases, wireless downlink communication is received on a downlink control channel of a frame, a subframe, or a partition corresponding to the dedicated resources.
[0183] The identification component 1445 can
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85/104 identify programmed spaces on the sidelink channel, where the identification of dedicated resources is based on the identified programmed spaces, identify dedicated resources for transmission having a first duration TTI on a sidelink channel based on receiving wireless downlink communication , where the sidelink channel is for performing D2D wireless communications using a second TTI of duration, and where the first TTI is less than the second TTI, determine whether low-latency traffic is uplink or downlink traffic, based on the standard TDD identified, identify an indicator associated with wireless communications with a first-time TTI on a sidelink channel while performing D2D wireless communications on a sidelink channel using transmissions from a second duration TTI, where the first TTI of duration is shorter than the second duration TTI, and identify dedicated resources on the sidelink channel for low latency communications based on the identifi indication of the indicator. In some cases, identifying dedicated resources includes: identifying a TDD standard. In some cases, identifying dedicated resources includes: identifying a TDD standard.
[0184] The suppression component 1450 may suspend sidelink communications on the sidelink channel during the identified resources.
[0185] Monitoring component 1455 can monitor an indication channel in the set of successive first TTIs to identify a presence of low latency traffic, determine the subset based on monitoring the indication channel, monitor a downlink indication channel in each first duration TTI in a
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86/104 set of successive first TTIs, and detect the granting of programming based on monitoring.
[0186] The LLC 1460 component can receive a schedule grant in response to transmit the SR to the base station, retransmit the low latency communication having the first duration TTI to the base station on the sidelink channel based on the schedule grant , suspend sidelink communications on the sidelink channel during a first TTI of individual duration in the set of successive first TTIs based on the detection of the programming concession, and perform one or more low latency transmissions on the resources identified on the sidelink channel. In some cases, conducting wireless uplink communications on the sidelink channel includes: transmitting a low latency communication having the first duration TTI to the base station before receiving a programming lease. In some cases, the first individual duration TTI includes
one next first TTI in duration in the set in successive first TTIs.[0187] The figure 15 shows a diagram of one
system 1500 which includes a device 1505 that supports signaling for multiplexing sidelink communications and low latency communication in accordance with aspects of the present disclosure. Device 1505 can be an example of or include components of wireless device 1205, wireless device 1305, or an UE 115 as described above, for example, with reference to figures 12 and 13. Device 1505 can include components for bidirectional speech and data communications including components to transmit
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87/104 and receive communications, including communications manager 1515, processor 1520, memory 1525, software 1530, transceiver 1535, antenna 1540 and I / O controller 1545. These components can be in electronic communication through one or more buses (for example, example, buses 1510). Device 1505 can communicate wirelessly with one or more base stations 105.
[( 0188] 0 processor 1520 can include one device in intelligent hardware, (per example, one processor in use general one DSP, an unity in
central processing (CPU), a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete port or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the 1520 processor can be configured to operate a memory array using a memory controller. In other cases, a memory controller can be integrated into the 1520 processor. The 1520 processor can be configured to execute computer-readable instructions stored in memory to perform various functions (for example, functions or tasks supporting signaling for low communication multiplexing) latency and sidelink communications).
[0189] The 1525 memory can include random access memory (RAM) and read-only memory (ROM). Memory 1525 can store computer-readable, computer-executable software 1530 including instructions that, when executed, cause the processor to perform various functions described here. In some cases, memory 1525 may contain, among others
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88/104 things, a basic input / output system (BIOS), which can control basic hardware or software operation, such as interaction with peripheral components or devices.
[0190] Software 1530 may include code to implement aspects of this disclosure, including code to support signaling for low latency multiplexing and sidelink communications. Software 1530 can be stored in a non-transitory, computer-readable medium, such as system memory or other memory. In some cases, the 1530 software may not be directly executable by the processor, but it can cause a computer (for example, when compiled and run) to perform the functions described here.
[0191] The 1535 transceiver can communicate bidirectionally, through one or more antennas, wired or wireless link, as described above. For example, the 1535 transceiver can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 1535 may also include a modem to modulate the packets and provide the modulated packets to the transmitting antennas, and to demodulate the packets received from the antennas.
[0192] In some cases, the wireless device may include a single 1540 antenna. However, in some cases, the device may have more than one 1540 antenna, which may be capable of simultaneously transmitting or receiving multiple wireless transmissions.
[0193] I / O controller 1545 can manage the input and output signals for the 1505 device.
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89/104 I / O controller 1545 can also manage peripherals not integrated in the 1505 device. In some cases, I / O controller 1545 can represent a physical connection or port for an external peripheral. In some cases, I / O controller 1545 may use an operating system such as iOS®, Android®, MS-DOS, MS-Windows®, OS / 2®, UNIX®, Linux®, or another known operating system. In other cases, I / O controller 1545 can represent or interact with a modem, keyboard, mouse, touchscreen, or similar device. In some cases, I / O controller 1545 can be implemented as part of a processor. In some cases, a user can interact with the 1505 device through the
I / O controller 1545 or through in components in hardware controlled per controller I / O 1545. [0194] A figure 16 show one flowchart what illustrates a 1600 process for signaling for
multiplexing of sidelink communications and low latency communications in accordance with aspects of this disclosure. Method 1600 operations can be implemented by a UE 115 or its components, as described herein. For example, method 1600 operations can be performed by a communications manager, as described with reference to figures 12 to 15. In some examples, a UE 115 may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 can perform aspects of the functions described below, using special purpose hardware.
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90/104 [0195] In block 1605 the UE 115 can identify an indicator associated with wireless communications having a first duration TTI on a sidelink channel while performing D2D wireless communications on the sidelink channel using a second duration TTI , in which the first duration TTI is shorter than the second duration TTI. Block 1605 operations can be carried out according to the methods described here. In certain examples, aspects of the operations of block 1605 can be performed by an indicator component, as described with reference to figures 12 to 15.
[0196] In block 1610 the UE 115 can receive a wireless downlink communication having the first duration TTI, in which the wireless downlink communication is received according to an FDD configuration. Block 1610 operations can be performed according to the methods described here. In certain examples, aspects of operations in block 1610 can be performed by a reserve component, as described with reference to figures 12 to 15.
[0197] In block 1615, UE 115 can identify dedicated uplink resources for negative acknowledgment / acknowledgment (ACK / NACK) based at least in part on the indicator identification, receiving wireless downlink communication, or both. The operations of block 1615 can be carried out according to the methods described here. In certain examples, aspects of operations in block 1615 can be performed by a return component, as described with reference to figures 12 to 15.
[0198] In block 1620 the UE 115 can reserve the
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91/104 dedicated uplink features for an ACK / NACK return transmission to a base station. Block 1620 operations can be performed according to the methods described here. In certain examples, aspects of operations in block 1620 may be performed by a reserve component, as described with reference to figures 12 to 15.
[0199] Figure 17 shows a flowchart that illustrates a 1700 signaling process for multiplexing sidelink and low latency communications according to aspects of the present disclosure. Method 1700 operations can be implemented by a UE 115 or its components, as described herein. For example, method 1700 operations can be performed by a communications manager, as described with reference to figures 12 to 15. In some examples, a UE 115 can execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 can perform aspects of the functions described below, using special purpose hardware.
[0200] In block 1705 the UE 115 can perform wireless uplink communications having a first TTI of duration on a sidelink channel, the sidelink channel also configured for wireless communications having a second TTI of duration, in which the first TTI duration is shorter than the second duration TTI. Block 1705 operations can be performed according to the methods described here. In certain examples, aspects of the 1705 block operations can be performed by a
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92/104 return component, as described with reference to figures 12 to 15.
[0201] In block 1710 the UE 115 can identify an indicator associated with wireless uplink communications. Block 1710 operations can be carried out according to the methods described here. In certain examples, aspects of the operations of the 1710 block can be performed by an indicator component, as described with reference to figures 12 to 15.
[0202] In block 1715 the UE 115 can identify the dedicated uplink resources for programming requests (SRs) for wireless uplink communication having the first duration TTI on the sidelink channel. Block 1715 operations can be performed according to the methods described here. In certain examples, aspects of the operations of block 1715 can be performed by a return component, as described with reference to figures 12 to 15.
[0203] In block 1720 the UE 115 can reserve the dedicated uplink resources for a transmission of SRs for wireless uplink communications having the first duration TTI. The operations of the 1720 block can be carried out according to the methods described here. In certain examples, aspects of the operations of the 1720 block can be performed by a reserve component, as described with reference to figures 12 to 15.
[0204] In block 1725 the UE 115 can transmit an SR to a base station, using the dedicated uplink resources on the sidelink channel. Block 1725 operations can be performed according to the methods here
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described. In certain examples, the aspects of operations of block 1725 can be performed by one component in SR as described with reference at figures 12 to 15 • [0205 ] Figure 18 shows a flow chart what illustrates one 1800 process for signage j iara
multiplexing of sidelink communications and low latency communications in accordance with aspects of this disclosure. Method 1800 operations can be implemented by a UE 115 or its components, as described herein. For example, method 1800 operations can be performed by a communications manager, as described with reference to figures 12 to 15. In some examples, a UE 115 may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 can perform aspects of the functions described below, using special purpose hardware.
[0206] In block 1805, the UE 115 can receive a wireless downlink communication according to a TDD configuration. Block 1805 operations can be performed according to the methods described here. In certain examples, aspects of the block 1805 operations can be performed by a TDD configuration component as described with reference to figures 12 to 15.
[0207] In block 1810 the UE 115 can identify dedicated resources for transmission having a first TTI of duration on a sidelink channel based at least in part on receiving the wireless downlink communication, in
Petition 870190084695, of 08/29/2019, p. 98/141
94/104 that the sidelink channel is for conducting D2D wireless communications using a second TTI of duration, and where the first TTI of duration is shorter than the second TTI of duration. Block 1810 operations can be performed according to the methods described here. In certain examples, aspects of the operations of block 1810 can be performed by an identification component, as described with reference to figures 12 to 15.
[0208] In block 1815, UE 115 can reserve dedicated resources for transmissions having the first TTI. The operations of block 1815 can be carried out according to the methods described here. In certain examples, aspects of operations in block 1815 may be performed by a reserve component, as described with reference to figures 12 to 15.
[0209] Figure 19 shows a flow chart illustrating a 1900 process for signaling for multiplexing low latency communication and sidelink communications according to aspects of the present disclosure. Method 1900 operations can be implemented by a UE 115 or its components, as described herein. For example, method 1900 operations can be performed by a communications manager, as described with reference to figures 12 to 15. In some examples, a UE 115 may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 can perform aspects of the functions described below, using special purpose hardware.
Petition 870190084695, of 08/29/2019, p. 99/141
95/104 [0210] In block 1905, the UE 115 can receive a wireless downlink communication according to a TDD configuration. The operations of the 1905 block can be carried out according to the methods described here. In certain examples, aspects of the 1905 block operations can be performed by a TDD configuration component as described with reference to figures 12 to 15.
[0211] In block 1910, UE 115 can identify programmed spaces on the sidelink channel, in which the identification of dedicated resources is based at least in part on the identified programmed spaces. Block 1910 operations can be carried out according to the methods described here. In certain examples, aspects of the operations of block 1910 may be performed by an identification component, as described with reference to figures 12 to 15.
[0212] In block 1915, the UE 115 can identify dedicated resources for transmission having a first TTI of duration on a sidelink channel based at least in part on receiving the wireless downlink communication, where the sidelink channel is for conducting D2D wireless communications using a second duration TTI, and where the first duration TTI is shorter than the second duration TTI. Block 1915 operations can be carried out according to the methods described here. In certain examples, aspects of the operations of block 1915 can be performed by an identification component, as described with reference to figures 12 to 15.
[0213] In block 1920, the UE 115 can reserve dedicated resources for transmissions with the first TTI.
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96/104
The operations of the 1920 block can be performed according to the methods described here. In certain examples, aspects of the 1920 block operations can be performed by a reserve component, as described with reference to figures 12 to 15.
[0214] Figure 20 shows a flowchart illustrating a 2000 process for signaling for multiplexing low latency communication and sidelink communications according to aspects of the present disclosure. Method 2000 operations can be implemented by a UE 115 or its components, as described herein. For example, method 2000 operations can be performed by a communications manager, as described with reference to figures 12 to 15. In some examples, a UE 115 may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 can perform aspects of the functions described below, using special purpose hardware.
[0215] In block 2005, UE 115 can identify an indicator associated with wireless communications having a first TTI of duration on a sidelink channel while conducting D2D wireless communications on a sidelink channel using transmissions from a second TTI of duration, in which the first duration TTI is shorter than the second duration TTI. The 2005 block operations can be carried out according to the methods described here. In certain examples, aspects of the 2005 block's operations can be carried out by a component of
Petition 870190084695, of 08/29/2019, p. 101/141
97/104 identification, as described with reference to figures 12 to 15.
[0216] In block 2010, the UE 115 can identify dedicated resources on the sidelink channel for low latency communications based at least in part on the identification of the indicator. The operations of the 2010 block can be carried out according to the methods described here. In certain examples, aspects of the 2010 block operations can be performed by an identification component, as described with reference to figures 12 to 15.
[0217] In block 2015, the UE 115 may suspend sidelink communications on the sidelink channel during the identified resources. The 2015 block operations can be carried out according to the methods described here. In certain examples, aspects of the 2015 block's operations can be performed by a suppression component, as described with reference to figures 12 to 15.
[0218] It should be noted that the methods described above describe possible implementations, and that operations and steps can be reordered or changed and that other implementations are possible. In addition, aspects of two or more of the methods can be combined.
[0219] The techniques described here can be used for various wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Multiple Access by Orthogonal Frequency Division (OFDMA), Multiple Access by Single Carrier Frequency Division (SC
Petition 870190084695, of 08/29/2019, p. 102/141
98/104
FDMA), and other systems. A CDMA system can implement radio technology, such as CDMA2000, Universal Terrestrial Radio Access (UTRA), etc. CDMA2000 covers IS-2000, IS-95 and IS-856. IS-2000 versions can be commonly referred to as CDMA2000 IX, IX, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 IxEV-DO, High Rate Packet Data (HRPD), etc. UTRA includes Broadband CDMA (WCDMA) and other CDMA variants. A TDMA system can implement radio technology, such as the Global System for Mobile Communications (GSM).
[0220] An OFDMA system can implement radio technology, such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 ( WiMAX), IEEE 802.20, flash-OFDM, etc. UTRA and E-UTRA are part of the Universal system for Mobile Telecommunications (UMTS). LTE and LTE-A are versions of UMTS that use EUTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, NR, and GSM are described in documents from the organization called 3rd Generation Partnership Project (3GPP). CDMA2000 and UMB are described in documents from an organization called 3rd Generation Partnership Project 2 (3GPP2). The techniques described here can be used for the radio systems and technologies mentioned above, as well as other radio systems and technologies. Although aspects of an LTE or RN system can be described for example, and LTE or NR terminology can be used in much of the description, the techniques described here are applicable in addition to LTE or NR applications.
[0221] A macro cell usually covers a
Petition 870190084695, of 08/29/2019, p. 103/141
99/104 relatively large geographic area (for example, several kilometers in radius) and can allow unrestricted access by UEs 115 with service subscriptions with the network provider. A small cell can be associated with a low power base station 105, compared to a macro cell, and a small cell can operate in the same or different frequency bands (for example, licensed, unlicensed, etc.) as the macro cells. Small cells can include pico cells, femto cells, and micro cells according to several examples. A peak cell, for example, can cover a small geographical area and can allow unrestricted access by UEs 115 with service subscriptions with the network provider. A femto cell can also cover a small geographical area (for example, a house) and can provide access restricted by UEs 115 by having an association with the femto cell (for example, UE 115 in a closed subscriber group (CSG), UEs 115 for home users, and so on). An eNB for a macro cell can be referred to as an eNB macro. An eNB for a small cell can be referred to as a small cell eNB, an eNB peak, an eNB femto, or a domestic eNB. An eNB can support one or more cells (for example, two, three, four, and the like), and it can also support communications that use one or more component carriers.
[0222] The wireless communication system 100 or systems described herein can support synchronous or asynchronous operation. For synchronous operation, base stations 105 may have similar frame timing, and transmissions from different base stations 105 may
Petition 870190084695, of 08/29/2019, p. 104/141
100/104 be approximately time aligned. For asynchronous operation, base stations 105 can have different frame timings, and transmissions from different base stations 105 cannot be time aligned. The techniques described here can be used for both synchronous and asynchronous operations.
[0223] The information and signals described here can be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that can be referenced throughout the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination of them.
[0224] The different illustrative blocks and modules described in connection with the description here can be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an arrangement of field programmable port (FPGA) or other programmable logic device (PLD), discrete port or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described here. A general purpose processor can be a microprocessor, but alternatively, the processor can be any conventional processor, controller, microcontroller, or conventional state machine. A processor can also be implemented as a combination of computing devices (for example, a combination of a DSP and a microprocessor, multiple
Petition 870190084695, of 08/29/2019, p. 105/141
101/104 microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).
[0225] The functions described here can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software run by a processor, functions can be stored or transmitted as one or more instructions or code in a computer-readable medium. Other examples and implementations are within the scope of the description and appended claims. For example, due to the nature of the software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions can also be physically located in various positions, including being distributed in such a way that parts of functions are implemented in different physical locations.
[0226] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates the transfer of a computer program from one place to another. A non-transitory storage medium can be any available medium that can be accessed by a general purpose or special purpose computer. As an example, and not as a limitation, non-transitory computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory
Petition 870190084695, of 08/29/2019, p. 106/141
102/104 (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store elements of desired program code in the form of instructions or data structures, and that can be accessed by a general purpose or special purpose computer, or general purpose or special purpose processor. In addition, any connection is correctly termed a computer-readable medium. For example, if the software is transmitted from a website, server or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technologies such as infrared, radio and microwave , then, coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio and microwave are included in the definition of media. Disc and floppy disk, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD), disc and Blu-ray disc where floppy disks generally reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included in the scope of computer-readable media.
[0227] As used herein, including in the claims, or, as used in a list of items (for example, a list of items preceded by a phrase such as at least one of or one or more of) indicates an inclusive list of such so that, for example, a list of at least one of A, B, or C means A or B or C or AB or
Petition 870190084695, of 08/29/2019, p. 107/141
103/104
AC or AC or ABC (that is, A, B and C). Furthermore, as used here, the phrase based on should not be understood as a reference to a closed set of conditions. For example, an exemplary step that is described as based on condition A can be based on both a condition of A and a condition of B without departing from the scope of the present disclosure. In other words, as used herein, the phrase based on must be interpreted in the same way as the expression based at least in part on.
[0228] In the attached figures, components or similar characteristics may have the same reference marker. In addition, several components of the same type can be distinguished by the next reference marker by a dash and a second marker that distinguishes between similar components. If only the first reference marker is used in the specification, the description is applicable to any of the similar components having the same first reference marker, regardless of the second reference marker, or another subsequent reference marker.
[0229] The description presented here, in connection with the attached drawings, describes exemplary configurations and does not represent all examples that can be implemented or that are within the scope of the claims. The term exemplary used herein means to serve as an example, case, or illustration, and not preferred or advantageous over other examples. The detailed description includes specific details for the purpose of providing an understanding of the techniques
Petition 870190084695, of 08/29/2019, p. 108/141
104/104 described. These techniques, however, can be practiced without these specific details. In some cases, well-known structures and devices are shown in the form of a block diagram in order to avoid obscuring the concepts of the examples described.
[0230] The present description is provided to allow a person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the description. Thus, the disclosure is not limited to the examples and drawings described here, but the broadest scope consistent with the innovative principles and characteristics presented here must be given.

权利要求:
Claims (30)
[1]
1. Method for wireless communication, comprising:
identify an indicator associated with wireless communications having a first transmission time interval (TTI) of duration on a sidelink channel while performing device-to-device (D2D) wireless communications on the sidelink channel using a second duration TTI , where the first duration TTI is shorter than the second duration TTI;
receiving a wireless downlink communication having the first duration TTI, in which the wireless downlink communication is received according to a frequency division duplex (FDD) configuration;
identify dedicated uplink resources for negative acknowledgment / confirmation (ACK / NACK) based at least in part on indicator identification, receiving wireless downlink communication, or both; and reserve the dedicated uplink resources for the forward transmission of ACK / NACK to a base station.
[2]
A method according to claim 1, wherein:
the dedicated uplink resources comprise a resource in each first TTI of duration in a plurality of successive first TTIs.
[3]
A method according to claim 1, wherein:
the dedicated uplink resources comprise a resource in a subset of the first duration TTIs in a plurality of successive first TTIs.
Petition 870190084695, of 08/29/2019, p. 110/141
2/8
[4]
A method according to claim 3, further comprising:
monitor an indication channel in the plurality of successive first TTIs to identify a presence of low latency traffic; and determining the subset based at least in part on the referral channel monitoring.
[5]
A method according to claim 4, further comprising:
reserving the dedicated uplink resources comprises emptying at least one resource of scheduled sidelink data transmissions.
[6]
A method according to claim 3, wherein:
the subset of the first duration TTIs is a first individual duration TTI in the plurality of successive first TTIs.
[7]
A method according to claim 1, further comprising:
monitor, during a first period, a downlink indication channel in each first TTI of duration in a plurality of successive first TTIs for the formation of low latency communication; and determine whether a low latency communication traffic profile during the first period is above a threshold based at least in part on monitoring, where reserving the dedicated uplink resources for ACK / NACK return transmission comprises reserving the resources dedicated uplink using a first mode or a second mode based at least in part on the
Petition 870190084695, of 08/29/2019, p. 111/141
3/8 determination.
[8]
8. The method of claim 7, wherein:
a low-latency communication traffic profile comprises at least one of the group that includes a traffic rate, a level of reliable reliability traffic, and an amount of ultra-reliable low-latency communication traffic (URLLC) over a period of time.
[9]
A method according to claim 8, wherein:
the first mode comprises reserving a resource in each first TTI of duration in the plurality of successive first TTIs; and the second mode comprises reserving a resource in a next first TTI of duration in the plurality of successive first TTIs.
[10]
10. The method of claim 1, wherein:
the indicator comprises a presence of low-latency communication traffic, a location of a low-latency communication (UE) user equipment, other information associated with low-latency communication, or a combination thereof.
[11]
11. The method of claim 1, wherein:
wireless downlink communication having the first duration TTI comprises low latency communication data.
[12]
12. Method for wireless communication,
Petition 870190084695, of 08/29/2019, p. 112/141
4/8 comprising:
perform wireless uplink communications having a first duration transmission time interval (TTI) on a sidelink channel, the sidelink channel also configured for wireless communications having a second duration TTI, where the first duration TTI is shorter than the second duration TTI;
identify an indicator associated with wireless uplink communications;
identify dedicated uplink resources for programming requests (SRs) for wireless uplink communications having the first lifetime TTI on the sidelink channel;
reserve dedicated uplink resources for transmitting SRs for wireless uplink communications having the first TTI period; and transmit an SR to a base station, using the dedicated uplink resources on the sidelink channel.
[13]
13. The method of claim 12, wherein:
the dedicated uplink resources comprise a resource in each first TTI of duration in a plurality of successive first TTIs.
[14]
14. The method of claim 12, wherein:
the dedicated uplink resources comprise a resource in a subset of the first duration TTIs in a plurality of successive first TTIs.
[15]
15. Method according to claim 12, in
Petition 870190084695, of 08/29/2019, p. 113/141
5/8 that:
performing wireless uplink communications on the sidelink channel comprises: transmitting a low latency communication having the first duration TTI to the base station before receiving a programming lease.
[16]
16. The method of claim 15, further comprising:
receiving a transmission failure indicator in response to transmitting low latency communication; and receiving a programming lease in response to transmitting the SR to the base station.
[17]
A method according to claim 16, further comprising:
retransmit the low latency communication having the first duration TTI to the base station on the sidelink channel based at least in part on the programming concession.
[18]
18. The method of claim 16, wherein:
[19]
19. The method of claim 12, further comprising:
monitoring a downlink indication channel in each first duration TTI in a plurality of successive first TTIs; and detecting a programming concession based at least in part on monitoring.
[20]
A method according to claim 19, further comprising:
suspend sidelink communications on the sidelink channel during a first individual duration TTI in
Petition 870190084695, of 08/29/2019, p. 114/141
6/8 plurality of successive first TTIs based at least in part on the detection of the programming concession.
[21]
21. The method of claim 20, wherein:
the first individual duration TTI comprises a next first duration TTI in the plurality of successive first TTIs.
[22]
22. Method for wireless communication, comprising:
receiving wireless downlink communication according to a time division duplex (TDD) configuration;
identify dedicated resources for transmission having a first duration TTI on a sidelink channel based at least in part on receiving the wireless downlink communication, where the sidelink channel is for performing device-to-device (D2D) wireless communications using a second duration TTI, and where the first duration TTI is shorter than the second duration TTI; and reserve dedicated resources for transmissions with the first TTI.
[23]
23. The method of claim 22, further comprising:
identify programmed spaces on the sidelink channel, where identifying dedicated resources is based at least in part on the identified programmed spaces.
[24]
24. The method of claim 22, wherein:
Petition 870190084695, of 08/29/2019, p. 115/141
7/8 wireless downlink communication is received on a channel from a downlink control frame, a subframe, or a partition corresponding to the dedicated resources.
[25]
25. The method of claim 22, wherein:
identifying dedicated resources comprises: identifying a duplex time division (TDD) pattern; and the method further comprising determining whether low-latency traffic is uplink traffic or downlink traffic, based at least in part on the identified TDD standard.
[26]
26. The method of claim 22, further comprising:
determine which low-latency communication will use two or less first-time TTIs.
[27]
27. Method for wireless communication, comprising:
identify an indicator associated with wireless communications having a first duration TTI on a sidelink channel while performing wireless device-to-device (D2D) communications on a sidelink channel using transmissions of a second duration TTI, where the first duration TTI is shorter than the second duration TTI;
identify dedicated resources on the sidelink channel for low latency communications based at least in part on the identification of the indicator; and suspend sidelink communications on the
Petition 870190084695, of 08/29/2019, p. 116/141
8/8 sidelink during the identified resources.
[28]
28. The method of claim 27, further comprising:
determine that low-latency communications will use more than two first duration TTIs, where identifying the indicator is based at least in part on the determination.
[29]
29. The method of claim 27, wherein:
identifying dedicated resources comprises: identifying a duplex time division (TDD) pattern; and the method further comprising determining whether low-latency traffic is uplink traffic or downlink traffic, based at least in part on the identified TDD standard.
[30]
30. The method of claim 27, further comprising:
perform one or more low-latency transmissions on the resources identified on the sidelink channel; and resume sidelink communications on the sidelink channel after making one or more low latency transmissions.

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法律状态:
2021-10-13| B350| Update of information on the portal [chapter 15.35 patent gazette]|

优先权:

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申请号 | 申请日 | 专利标题

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US201762466839P| true| 2017-03-03|2017-03-03|

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US62/466,839|2017-03-03|

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US201762469416P| true| 2017-03-09|2017-03-09|

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US62/469,416|2017-03-09|

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US15/711,751|2017-09-21|

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PCT/US2018/018560|WO2018160372A1|2017-03-03|2018-02-17|Signaling for multiplexing of low latency communication and sidelink communications|

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