METHODS, BASE STATION, AND USER EQUIPMENT FOR TRANSMITING COMMON PREEMPTION INDICATION TO GROUP

专利摘要:
systems and methods are provided to transmit and receive prevention indications. the prevention indication are all k symbols or partitions transmitted, in a physical downlink control channel of a common group. the prevention indication is about a group of k symbols or partitions prior to a symbol or partition containing the common group prevention indication. the common group prevention indication indicates, for the group of k symbols or partitions, which resources are prevented. the base station schedules resources for first downlink traffic, and transmits the first downlink traffic object programmed for prevention, and transmits second downlink traffic preventing resources for the first downlink traffic. on the eu side, the eu receives the indication of prevention. the eu receives its scheduled traffic taking into account the prevention indication.
公开号:BR112019022810A2
申请号:R112019022810-1
申请日:2018-04-03
公开日:2020-05-26
发明作者:Islam Toufiqul；Maaref Amine；Zhang Jiayin
申请人:Huawei Technologies Co., Ltd.；
IPC主号:

专利说明:

“SYSTEM AND METHOD FOR THE COEXISTENCE OF LOW LATENCY COMMUNICATIONS AND TOLERANT TO LATENCY”
CROSS REFERENCE TO RELATED REQUESTS
[0001] This application claims the benefit of United States Provisional Application No. ² 62 / 500,904, filed on May 3, 2017, entitled “SYSTEM AND METHOD FOR COEXISTENCE OF LOW LATENCY AND LATENCY TOLERANT COMMUNICATIONS”, and Patent Application for United States N ² 15 / 909,399, filed on March 1, 2018, entitled “SYSTEM AND METHOD FOR COEXISTENCE OF LOW LATENCY AND LATENCY TOLERANT COMMUNICATIONS”, the entire contents of which are incorporated in this report as a reference.
FIELD
[0002] The application refers to systems and methods for the coexistence of low latency and latency tolerant communication.
FUNDAMENTALS
[0003] In some wireless communication systems, user equipment (UEs) communicate wirelessly with one or more base stations. Wireless communication from a UE to a base station is referred to as an uplink communication. Wireless communication from a base station to a UE is referred to as a downlink communication. Resources are needed to carry out uplink and downlink communications. For example, a base station can wirelessly transmit data to a UE on a downlink communication at a particular frequency for a particular length of time. Frequency and length of time are examples of resources.
[0004] A base station allocates resources for downlink communication to the UEs served by the base station. Downlink communication can be performed by transmitting orthogonal frequency division (OFDM) multiplexing symbols.
[0005] Some UEs served by a base station may need to receive data from the base station with less latency than other UEs served by the base station. For example, a base station can serve multiple UEs, including a first UE and a second UE. The first UE can be a mobile device carried by a human using
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2/45 the first UE to surf the Internet. The second UE may be the equipment in an autonomous vehicle driven on a highway. Although the base station is serving the two UEs, the second UE may need to receive data with less latency compared to the first UE. The second UE may also need to receive its data more reliably than the first UE. The second UE can be an ultra reliable low-latency communication UE (URLLC), while the first UE can be an enhanced mobile broadband UE (eMBB).
[0006] UEs that are served by a base station and that require lower latency downlink communication will be referred to as "low latency UEs". The other UEs served by the base station will be referred to as "latency tolerant UEs". The data to be transmitted from the base station to a low latency UE will be referred to as “low latency data”, and the data to be transmitted from the base station to a latency tolerant UE will be referred to as “data tolerant to latency ”. A single UE can use both low-latency communication and latency-tolerant communication, in which case the term “low-latency EU” refers to the activities of the single UE for the purpose of low-latency communication, and the term “Latency-tolerant EU” refers to the activities of the single UE for the purpose of latency-tolerant communication.
[0007] It is desired to have a base station and frame structure that can accommodate the use of the same time frequency resources by both low-latency UEs and latency-tolerant UEs.
SUMMARY
[0008] In accordance with an aspect of the present invention, a method is provided comprising: all K symbols or partitions, on a group downlink control channel common to a group, transmitting an indication of preemption common to a group in relation to a group of K symbols or partitions that precede a symbol or partition containing the indication of preemption common to the group; the indication of preemption common to the group indicates, for the group of K symbols or partitions, which resources are preemptible.
[0009] Optionally, transmitting the preemption indication common to the group comprises transmitting using a set of control resources within the physical downlink control channel common to the group.
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[0010] Optionally, the method also comprises transmitting a setting of a value to K.
[0011] Optionally, for each preemption indication common to the transmitted group, the group of K symbols or partitions are the last K symbols or partitions preceding the symbol or partition containing the preemption indication information common to the group.
[0012] Optionally, the method also comprises transmitting signaling by configuring the set of control resources to be used to transmit the preemption indication.
[0013] Optionally, the indication of preemption common to group contains N bits, each bit indicating preemption to a granularity defined in a time and / or frequency.
[0014] Optionally, the method also comprises transmitting the signaling that configures the defined granularity.
[0015] Optionally, the indication of preemption common to group contains multiple fields; the method further comprises the transmission of signaling to a UE indicates which of the multiple fields are relevant to the UE.
[0016] Optionally, the method also comprises the transmission of a respective indication of preemption common to the group for each of a plurality of parts of bandwidth.
[0017] Optionally, when the preemption indication is that of a first set of values, the preemption indication indicates the preemption resources that are contiguous; and when the preemption indication is that of a second set of values, the preemption indication indicates the preemption resources that are not contiguous.
[0018] In accordance with another aspect of the present invention, a method is provided in a user equipment (UE), the method comprises: all K symbols or partitions, in a physical downlink control channel common to the group, receiving a group preemption indication in relation to a group of K symbols or partitions that precede a symbol or partition containing the group preemption indication; the indication of preemption common to the group indicates, for the group of K symbols or partitions, that the resources are preemptible.
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[0019] Optionally, receiving the indication of preemption common to the group comprises receiving using a set of control resources within the physical downlink control channel common to the group.
[0020] Optionally, the method also comprises receiving a setting of a value for K.
[0021] Optionally, for each preemption indication common to the group received, the group of K symbols or partitions are the last K symbols or partitions that precede the symbol or partition containing the preemption indication information common to the group.
[0022] Optionally, the method also comprises receiving the signaling by configuring the set of control resources to be used to transmit the preemption indication.
[0023] Optionally, the preemption indication common to the group contains N bits, each bit indicating preemption to a granularity defined in time and / or frequency.
[0024] Optionally, the method also comprises receiving the signaling that configures the defined granularity.
[0025] Optionally, the indication of preemption common to the group contains multiple fields; the method further comprises receiving the signaling indicating which of the multiple fields are relevant to a UE receiving the signaling.
[0026] Optionally, a respective group preemption indication is transmitted to each of a plurality of bandwidth parts, the method comprising the UE monitoring any group common preemption indication in relation to the bandwidth parts used by the EU.
[0027] Optionally, when the preemption indication is that of a first set of values, the preemption indication indicates the preemption resources that are contiguous; and when the preemption indication is that of a second set of values, the preemption indication indicates the preemption resources that are not contiguous.
[0028] In accordance with another aspect of the present invention, a base station is provided comprising: a transmission chain configured for, all K symbols or partitions, in a control channel of
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5/45 physical downlink common to group, transmit a preemption indication common to group in relation to a group of K symbols or partitions preceding a symbol or partition containing the indication of preemption common to group; the indication of preemption common to the group indicates, for the group of K symbols or partitions, that the resources are preemptible.
[0029] Optionally, the method also comprises a programmer configured to program resources for the first downlink traffic; the transmission chain further configured to transmit the first programmed downlink traffic subject to preemption, and to transmit the second downlink traffic by preemption of resources to the first downlink traffic.
[0030] Optionally, the transmission chain is configured to transmit the preemption indication common to the group using a set of control resources within the physical downlink control channel common to the group.
[0031] Optionally, the base station is additionally configured to transmit a setting of a value for K.
[0032] Optionally, for each preemption indication common to the transmitted group, the group of K symbols or partitions are the last K symbols or partitions that precede the symbol or partition containing the preemption indication information common to the group.
[0033] Optionally, the base station is additionally configured to transmit the signaling by configuring the set of control resources to be used to transmit the preemption indication.
[0034] Optionally, the preemption indication common to the group contains N bits, each bit indicating preemption to a granularity defined in time and / or frequency.
[0035] Optionally, the base station is additionally configured to transmit the signaling that configures the defined granularity.
[0036] Optionally, the indication of preemption common to group contains multiple fields; the base station additionally configured to transmit signaling to a UE indicating which of the multiple fields are relevant to the UE.
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[0037] Optionally, the base station is additionally configured to transmit a respective preemption indication common to the group for each of a plurality of parts of bandwidth.
[0038] Optionally, when the preemption indication is that of a first set of values, the preemption indication indicates the preemption resources that are contiguous; and when the preemption indication is that of a second set of values, the preemption indication indicates the preemption resources that are not contiguous.
[0039] According to another aspect of the present invention, user equipment is provided in a user equipment (UE), the user equipment comprises: a receiving chain configured for, all K symbols or partitions, in a channel of physical downlink control common to group, receiving an indication of preemption common to group in relation to a group of K symbols or partitions preceding a symbol or partition containing the indication of preemption common to group; the indication of preemption common to the group indicates, for the group of K symbols or partitions, that the resources are preemptible.
[0040] Optionally, the receiving chain is configured to receive uplink programming information that schedules the first downlink traffic to the UE; the receiving chain comprising a subcarrier demapper that performs the subcarrier demapping based on the received uplink programming information, also taking into account the preemption indication common to the received group.
[0041] Optionally, the receiving chain is configured to receive the indication of preemption common to the group by receiving using a set of control resources within the physical downlink control channel common to the group.
[0042] Optionally, the user equipment is additionally configured to receive a setting of a value for K.
[0043] Optionally, for each preemption indication common to the group received, the group of K symbols or partitions are the last K symbols or partitions that precede the symbol or partition containing the preemption indication information common to the group.
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[0044] Optionally, the user equipment is additionally configured to receive signaling by configuring the set of control resources to be used to transmit the preemption indication.
[0045] Optionally, the preemption indication common to the group contains N bits, each bit indicating preemption to a granularity defined in time and / or frequency.
[0046] Optionally, the user equipment is additionally configured to receive the signal that configures the defined granularity.
[0047] Optionally, the indication of preemption common to group contains multiple fields; the user equipment additionally configured to receive the signal indicating which of the multiple fields are relevant to a UE that receives the signal.
[0048] Optionally, a respective group preemption indication is transmitted to each of a plurality of bandwidth parts, the user equipment additionally configured to monitor any group common preemption indication in relation to the parts of bandwidth. bandwidth used by the UE.
[0049] Optionally, when the preemption indication is that of a first set of values, the preemption indication indicates the preemption resources that are contiguous; and when the preemption indication is that of a second set of values, the preemption indication indicates the preemption resources that are not contiguous.
[0050] In accordance with an aspect of the present invention, a method is provided on user equipment, the method comprises: receiving downlink control information comprising a preemption indicator having at least: a HARQ process identifier; N bits to indicate time frequency regions of a previously programmed transmission that have been impacted by preemption.
[0051] In some modalities, the method also includes receiving a configuration of N.
[0052] In some modalities, the preemption indicator is received only in relation to an impacted transmission for which there is a subsequent transmission in relation to the impacted transmission.
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[0053] In some modalities, in which the downlink control information contains an HARQ process identifier and / or a resource allocation to schedule the subsequent transmission.
[0054] In some modalities, the existence of the preemption indicator also serves to indicate that the subsequent transmission is not a new transmission.
[0055] In some modalities, the downlink control information also includes: a resource allocation and / or an HARQ process identifier for a new transmission.
[0056] In accordance with another aspect of the present invention there is provided a method comprising: receiving downlink control information comprising a redundancy version index that indicates preemption in relation to a previously programmed transmission.
[0057] In some modalities, each redundancy version index refers to a respective redundancy version composed of one or more groups of code blocks.
[0058] In some modalities, the redundancy version index received indicates a redundancy version that best corresponds to the groups of impacted blocks of code.
[0059] In some modalities, the redundancy version index is one of the K options, where M among the K options indicates subsequent transmission at the TB level and the K-M options among the K options indicate subsequent transmission based on CBG.
[0060] In accordance with another aspect of the present invention, a method is provided on user equipment, the method comprises: receiving downlink control information comprising a redundancy version index; where for a new transmission, the redundancy version index indicates the transmission at the transport block level, where a redundancy version corresponds to a set of coded bits that form a transport block; where for a retransmission, the redundancy version index refers to the retransmission at the CBG level, where different redundancy versions are mapped to different combinations of CBGs.
[0061] In some modalities, when received in relation to
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9/45 preemption features, the redundancy version index works as a preemption indication to indicate preemption features; when received in relation to a retransmission received based on feedback from HARQ, the redundancy version works to indicate which CBGs are retransmitted after an initial transmission.
[0062] According to another aspect of the present invention, a method is provided in a UE, the method comprises: receiving downlink control information in relation to a retransmission, the downlink control information comprises: a first field that indicates whether the retransmission is based on preemption or not; when the first field indicates preemption, a second field indicates preemption resources; when the first does not indicate preemption, the second field is used for transmission at the TB level to indicate that the redundancy version is transmitted or to indicate which CBGs are retransmitted.
[0063] In accordance with another aspect of the present invention, a method is provided in a UE, the method comprises: receiving from a single downlink control information which includes programming for one or a combination of: one or multiple retransmissions due preemption; one or more retransmissions based on feedback from HARQ; one or more new streams.
[0064] In some modalities, DCIs include: indication of the HARQ process IDs, both for the HARQ retransmission process and for the new HARQ transmission process; and / or redundancy version information for both the retransmission HARQ process and the new transmission HARQ process.
[0065] In some modalities, DCIs also include: an indication of which CBGs or symbols from the previous transmission are being retransmitted; and / or new data indicator bits (NDI) for CBG-based retransmission.
[0066] According to another aspect of the present invention, a method is provided in a UE comprising: monitoring a physical downlink control channel (PDCCH) common to a group transmitted to all K symbols or partitions or every X ms, o PDDCH common to group containing preemption information for a group of UEs.
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[0067] In some modalities, monitoring by the UE is carried out based on a monitoring period that is one of: specific UEs; specific cells; specific groups.
[0068] In some embodiments, preemption information indicates areas of preemption / impact transmission over a group of symbols that appeared before a symbol containing PDCCH common to the group.
[0069] In some modalities, the PDCCH common to the group contains preemption indication information related to transmissions through K previous symbols.
[0070] In some modalities, the PDCCH common to the group is transmitted to all K symbols to notify the UEs with continuous transmission that part of the resources programmed over the following groups of symbols are preemptible and assigned to another DL transmission.
[0071] In some embodiments, the PDCCH common to the group contains M specific EU fields.
[0072] In accordance with another aspect of the present invention, a method is provided in a UE, the method comprises: receiving downlink control (DCI) information from a transport block having at least a first part and a second part; wherein the first part of the DCI provides programming information for the transport block and is received at the beginning of a transmission interval or duration; where the second part of the DCI notifies the UE of the occurrence of preemption during the scheduled transmission of the transport block; the method further comprising, if the second party notifies that preemption has occurred, monitoring a group-common PDCCH on one or more of the subsequent symbols to obtain more detailed preemption information.
[0073] In some embodiments, the group-common PDCCH falls within a shared packet data channel of an eMBB transmission, and the UE is configured with the following behavior: UE blindly detects the group-common PDCCH in the pre search space -configured that can be used for PDSCH; or the group-common PDCCH is in a reserved location in a pre-configured control feature set area that is avoided for PDSCH programming; or the PDCCH common to group is
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11/45 overlaid with the PDSCH transmission.
[0074] In some embodiments, the MIMO transmission is used in an overlap area between the PDCCH common to the group and the PDSCH transmission.
[0075] According to another aspect of the present invention, a method is provided in a UE, the method comprises: receiving a transmission that may or may not be subject to interference due to a transmission to another UE in another MIMO layer; receive an indication message containing information related to the beam in relation to the transmission that indicates that the transmission is impacted by the transmission in another MIMO layer.
[0076] In some modalities, the preemption indication message also indicates an impacted time and / or frequency resource.
[0077] In some embodiments, the preemption indication message comprises beam formation information and / or interference channel information to facilitate interference cancellation by the UE.
[0078] In some embodiments, the method further comprises performing beam formation based on beam formation information and / or performing interference cancellation based on interference channel information.
[0079] In some embodiments, the interference channel information comprises information related to a demodulation reference signal (DM-RS) used by a base station in relation to transmission to another UE in another MIMO layer.
[0080] In some embodiments, the interference channel information comprises at least one of the time, frequency, code, sequence resources used to send the DM-RS so that the UE can detect the DM-RS.
[0081] According to another aspect of the present invention, a method is provided in a UE, the method comprises: receiving a transmission that may or may not be subject to interference from a transmission in another MIMO layer to a different UE; perform the blind detection of the DM-RS transmission in relation to the transmission on the other MIMO layer for the different UE, and after detecting the DM-RS, perform the beam formation or
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12/45 interference cancellation based on detected DM-RS.
[0082] In some modalities, performing blind detection comprises: based on a set of possible DM-RS ports, the UE trying to blindly perform DM-RS decoding for each possible DM-RS port.
[0083] In accordance with another aspect of the present invention, a method is provided in a UE, the method comprises: receiving downlink control information comprising an indication of an initial position and / or duration in relation to a transmission based on symbol that can impact the time frequency resources of a transmission to the UE.
[0084] In some embodiments, the indication comprises: an initial position field of log2K bits to indicate one of the possible K initial positions of a length field containing log2M bits to indicate the length.
[0085] In some modalities, the method also comprises receiving an indication of granularity in relation to the length field, both as part of the downlink control information and in the upper layer signaling.
[0086] In accordance with another aspect of the present invention, a method is provided in a UE, the method comprises: performing any one or a combination of two or more methods described in this report.
[0087] In accordance with another aspect of the present invention, a UE configured to perform one of the methods summarized above or described in this report is provided.
[0088] In accordance with another aspect of the present invention, a base station configured to transmit latency-tolerant and latency-intolerant UEs according to any one or a combination of two or more of the methods described in this report is provided.
BRIEF DESCRIPTION OF THE DRAWINGS
[0089] The disclosure modalities will now be described with reference to the attached drawings in which:
[0090] Figure 1 is a block diagram of a base station and UEs according to an embodiment of the invention;
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[0091] Figure 2 is a schematic block diagram of a base station according to some modalities of the present disclosure;
[0092] Figure 3 is a schematic block diagram of a wireless device according to some modalities of the present disclosure;
[0093] Figure 4 is a block diagram of a base station with a transmission chain;
[0094] Figure 5 is a block diagram of a UE with a transmission chain generally;
[0095] Figure 6 is an example of a signaling structure common to the group;
[0096] Figure 7 is an example that shows a PDCCH common to the group sent to all partitions at the beginning of the partitions;
[0097] Figure 8 is an example where a PDCCH common to the group is sent to each second partition at the beginning of the partitions;
[0098] Figure 9 is an example where a preemption indication is transmitted in the following eMBB transmission to indicate overlap between different MIMO layers in the previous eMBB transmission;
[0099] Figure 10 is an example of a preemption indication in which 9 symbols are indicated, and the starting position is the 6 ² symbol of the partition;
[0100] Figure 11 is an example of a preemption indication, where 16 symbols are indicated, and the starting position is the 4 ² symbol of the partition;
[0101] Figure 12 is an example of a mini-partition structure where control resources are reserved at each second symbol; and
[0102] Figure 13 is an example of a mini-partition control region, where eMBB traffic can use features that overlap with unused control features.
DETAILED DESCRIPTION
[0103] In general, the modalities of this disclosure provide a method and system for the coexistence of low latency and latency tolerant communications. For simplicity and clarity of the illustration, reference numbers can be repeated between the figures to indicate corresponding or similar elements. Numerous details are presented to provide an understanding of the examples described in this report. Examples can be practiced without these details. In other cases, methods,
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14/45 well-known procedures and components are not described in detail to avoid hiding the described examples. The description should not be considered as limited to the scope of the examples described in this report.
[0104] In the examples detailed below, low-latency traffic is considered as URLLC, and latency-tolerant traffic is considered as eMBB, but it should be understood that these modalities are applicable to low-latency traffic in general, and traffic tolerant to latency.
[0105] The examples mentioned below can be applied to any Duplex System, frequency division duplex, time division duplex, unified duplex, etc.
[0106] FIG. 1 is a block diagram of a base station 100, as well as four UEs 102a, 102b, 104a and 104b served by the base station 100, according to one embodiment. UEs 102a and 102b are low-latency UEs, and UEs 104a and 104b are latency-tolerant UEs. That is, UEs 102a and 102b require lower latency downlink communication compared to UEs 104a and 104b. For example, UEs 102a and 102b can be URLLC UEs, and UEs 104a and 104b can be eMBB UEs. Although base station 100 serves only four UEs in FIG. 1, in real operation, base station 100 can serve many more UEs. It is also considered that a single UE can be served by more than one base station 100. Downlink transmissions to latency-tolerant UEs are typically concession-based, but may be concession-free. In addition, downlink transmissions to low-latency UEs can be either concession-based or concession-free.
[0107] Base station 100 includes queues 108 to store data to be sent to UEs served by base station 100. Queues 108 can be implemented by memory, for example, physical records. The base station 100 additionally includes a programmer 110 to program UEs in the available resources. Base station 100 additionally includes processing blocks to implement the physical downlink layer, such as an error control encoder 114, a rate counterpart 116, a modulator 118 and a resource mapper 120. The physical link layer descendant of base station 100 may include other processing blocks, but these have been omitted for the sake of
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15/45 clarity.
[0108] Programmer 110, error control encoder 114, rate correspondent 116, modulator 118 and resource mapper 120 each, can be implemented by a processor that executes instructions that cause the processor to perform the operations of programmer 110, error control encoder 114, rate counterpart 116, modulator 118 and resource mapper 120. The same or different processor can be used to implement each of programmer 110, error control encoder 114, rate counter 116, modulator 118 and resource mapper 120. Alternatively, programmer 110, error control encoder 114, rate counterpart 116, modulator 118 and / or resource mapper 120 can be implemented using dedicated integrated circuit, such as an application specific integrated circuit ( ASIC), a graphics processing unit (GPU), or an arrangement of programmable field programmable ports (FPGA) that perform the functions of programmer 110, error control encoder 114, rate counterpart 116, modulator 118 and / or resource mapper 120.
[0109] Base station 100 additionally includes one or more antennas 122 for wirelessly transmitting signals that carry data to UEs 102a, 102b, 104a and 104b. Only one antenna 122 is illustrated. The base station 100 may include another circuit and / or modules that perform other functions, for example, for uplink communication, but these have been omitted for the sake of clarity.
[0110] The term “base station” encompasses any device that communicates wirelessly with UEs using downlink and uplink communication. Therefore, in some implementations, base station 100 may be called by other names, such as a transmit and receive point (TRP), a transceiver base station, a radio base station, a network node, a transmit / receive node, a Node B, an eNodeB (eNB), a gNB, a relay station or a remote radio head. In addition, in some embodiments, parts of base station 100 may be distributed. For example, some of the processing modules / blocks of the base station 100 can be located remotely from the equipment that hosts the antennas of the base station 100, and can be
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16/45 coupled to the equipment that hosts the antennas through a communication link (not shown). Therefore, in some embodiments, the term base station 100 can also refer to the processing modules / blocks on the side of the network that perform processing operations, such as programming and downlink control signal generation, and which do not they are necessarily part of the equipment that hosts the antennas of the base station 100. The modules / processing blocks can also be coupled to other base stations. In some embodiments, base station 100 may actually be a plurality of base stations that are operated together, to serve UEs, for example, through coordinated multipoint transmissions.
[0111] UEs 102a, 102b, 104a, 104b should be illustrative of any end user device that can be configured as disclosed in this report for BS 100 uplink / downlink communication. Examples of user devices include wireless transmission / reception (WTRUs), mobile stations, wireless devices, fixed or mobile subscriber units, cell phones, personal digital assistants (PDAs), smartphones, laptops, computers, touchpads, wireless sensors and consumer electronic devices.
[0112] As noted above, UEs 102a, 102b are UEs that may need low latency, and have sporadic traffic requirements, and UEs 104a, 104b are UEs that may not have such a strict latency requirement, and may have requirements more compatible traffic types, at least when active. In a more specific example, UEs 102a, 102b use orthogonal frequency division multiplexing (OFDM) to transmit URLLC traffic. It is considered that OFDM can be used in combination with orthogonal multiple access or a non-orthogonal multiple access scheme such as Sparse Code Multiple Access (SCMA), Interleaved Grid Multiple Access (IGMA), Multiple User Shared Access (MUSA), Low Code Rate Dissemination, Frequency Domain Dissemination, Non-Orthogonal Encoded Multiple Access (NCMA), Standards Division Multiple Access (PDMA), Resource Dissemination Multiple Access (RSMA), Low Density Dissemination Vector Extension Subscription (LDS-SVE), Shared Access with Low Code Rate and Subscription (LSSA), Access
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Coded Non-Orthogonal (NOCA), Multiple Access by Interleaving Division (IDMA), Multiple Access by Repeating Division (RDMA) and Orthogonal Coded Group Access (GOCA). UEs 104a, 104b, for example, transmit enhanced mobile broadband (eMBB) traffic. UEs 104a, 104b can also use OFDM in combination with orthogonal multiple access or a non-orthogonal multiple access scheme.
[0113] When base station 100 has data to transmit to UEs 102a, 102b, 104a, and / or 104b, base station 100 transmits this data in one or more downlink transmissions using allocated resources. A set of time frequency resources 126 is divided into a coexistence bandwidth partition 128, and a latency-tolerant bandwidth partition 130. The resources within coexistence partition 128 are available for the transmission of both traffic low latency downlink traffic and latency tolerant downlink traffic, while the latency tolerant partition is available for the transmission of latency tolerant downlink traffic.
[0114] In operation, the data that must be transmitted from the base station 100 to the UEs is stored in queues 108. For a particular downlink transmission, the programmer 110 allocates available resources to the respective UEs that are served by the station base 100. Low-latency data for low-latency UEs is transmitted on low-latency resources 128, and latency-tolerant data for latency-tolerant UEs, latency-tolerant resources 130 and / or low-latency resources are programmed. 128. Programmer 110 uses an algorithm to decide which resources should be allocated to the UEs. An example of an algorithm that can be used by programmer 110 to allocate resources for low-latency traffic is a delay-based algorithm that takes into account the latency constraints of low-latency traffic. When only latency-tolerant traffic is present, a proportionately fair scheduling algorithm (PF) can be used. When a resource partition is assigned to a UE, an appropriate number of bits are removed from the queue corresponding to that UE and sent to the physical downlink layer. Error control encoder 114 encodes bits using an error control code to result in encoded bits. a
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18/45 example of an error control code that can be applied by error control encoder 114 is a turbo code. The encoded bits emitted from the error control encoder 114 may be subject to rate matching in rate correspondent 116. Rate correspondent 116 may match the number of bits in a transport block to the number of bits that can be transmitted in the given allocation, and rate matching may involve sub-block interleaving, bit collection and / or removal. Modulator 118 then modulates the encoded bits to generate modulated symbols. Resource mapper 120 maps the modulated symbols to the resources assigned to the UE.
[0115] An example of implementation of UE 104a is illustrated in more detail in FIG. 1 and includes one or more antennas 152 for receiving downlink transmissions 124. Only one antenna 152 is illustrated. UE 104a includes a receiver 154 for processing received downlink transmissions 124. For example, receiver 154 can implement downlink physical layer processing, such as decoding and demodulation to extract data, pilot sequences and signaling intended for the EU 104a. A decoder 155 which performs decoding is illustrated. Receiver 154 and decoder 155 can each be implemented by a processor that executes instructions that cause the processor to perform the operations of receiver 154 and decoder 155. The same or different processor can be used to implement each of receiver 154 and decoder 155. Alternatively, receiver 154 and / or decoder 155 can be implemented using dedicated integrated circuit, such as an ASIC, GPU or FPGA that performs the functions of receiver 154 and / or decoder 155. UE 104b has a structure similar to UE 104a.
[0116] Figure 2 is a schematic block diagram of a BS 12 according to some modalities of the present disclosure. As illustrated, BS 12 includes a control system 34 configured to perform the network side functionality described in this report. In some implementations, the control system 34 is in the form of circuits configured to perform the functions on the network side. In still other implementations, the control system or circuit 34 includes one or more processors 36 (for example, CPUs, ASICs, FPGAs, and / or the like) and memory 38 and possibly a network interface
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40. BS 12 also includes one or more radio units 42 which each include one or more transmitters 44 and one or more receivers 46 coupled to one or more antennas 48. In some other implementations, the functionality of BS 12 described in this report it can be completely or partially implemented in software or modules, that is, for example, stored in memory 38 and executed by processor (s) 36.
[0117] In still other implementations, a computer program including instructions that, when executed by at least one processor, cause at least one processor to perform the functionality of BS 12 according to any of the modalities described in this report provided. In still other implementations, a carrier containing the aforementioned computer program product is provided. The carrier is an electronic signal, an optical signal, a radio signal, or a computer-readable storage medium (for example, a non-transitory computer-readable medium such as memory).
[0118] Figure 3 is a schematic block diagram of a wireless device according to some modalities of the present disclosure. As illustrated, the wireless device includes circuit 18 configured to perform the wireless device functions described in this report. In some implementations, circuit 18 includes one or more processors 20 (for example, Central Processing Units (CPUs), Application Specific Integrated Circuits (ASICs), Field Programmable Port Arrays (FPGAs), and / or the like) and memory 22. Wireless device 14 also includes one or more transceivers 24 each including one or more transmitters 26 and one or more receivers 28 coupled to one or more antennas 30. In some other implementations, the functionality of wireless device 14 described this report can be completely or partially implemented in software or modules, that is, for example, stored in memory 22 and executed by processor (s) 20.
[0119] In yet other implementations, a computer program including instructions that, when executed by at least one processor, cause at least one processor to perform the functionality of the wireless device 14 according to any of the modalities described in this report provided . In still others
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20/45 implementations, a carrier containing the aforementioned computer program producer is provided. The carrier is an electronic signal, an optical signal, a radio signal, or a computer-readable storage medium (for example, a non-transitory computer-readable medium such as memory).
[0120] Figure 4 is another example of a base station with a transmission chain generally indicated at 900, and a receiving chain from a base station generally indicated at 903.
[0121] Transmission chain 900 includes a constellation mapper 910, mapping block and grouping of subcarriers 911, IFFT 912, pilot symbol and cyclic prefix insertion 914, and frequency location operator 916 (for example, filtering, filtering subband, windows, subband windows). Also shown is a downlink programmer 950 that performs downlink programming.
[0122] In operation, constellation mapper 910 receives UE data (more generally, UE content containing data and / or signaling) for downlink transmission to Ki UEs, where Ki> = 1.0 constellation mapper 910 maps the UE data for each of the Ki UEs to a respective chain of constellation symbols and generates this in 920. The number of bits per UE symbol depends on the particular constellation used by the constellation mapper 910. In the example of amplitude modulation quadrature (QAM), 2 bits for each UE are mapped to a respective QAM symbol.
[0123] For each OFDM symbol period, the subcarrier 911 mapping and grouping block groups and maps the constellation symbols produced by the constellation mapper 910 to P IFFT 912 entries in 922. Grouping and mapping are performed based on uplink scheduling information received from downlink scheduler 950, according to a defined resource block definition and allocation for the content of Ki UEs being processed in 900 transmission chain. As noted above, link transmissions descendant are generally programmed for all UEs. P is the size of IFFT 912. Not all of the P inputs are necessarily used for each OFDM symbol period. The IFFT 912 receives up to P symbols, and generates
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21/45 time domain samples P at 924. After that, in some implementations, time domain pilot symbols are inserted and a cyclic prefix is added in block 914. The frequency location operator 916 can, for example, apply a filter that limits the spectrum at the output of the 900 transmission chain.
[0124] Receiving chain 903 includes frequency locating operator 930, cyclic prefix deletion and pilot symbol processing 932, fast Fourier transformation (FFT) 934, demapping of subcarrier 936 and equalizer 938. Each element in the chain receipt performs reverse operations corresponding to those performed in the transmission chain. Receiving chain 903 receives uplink signals generated according to the scheduling information and / or resource allocation information generated by the programmer and / or resource allocator 960. The subcarrier demapper 936 also makes use of the programmer's information and / or resource allocation information from the 960 scheduler and / or resource allocator.
[0125] When multiple numerologies are supported, according to the modalities described in detail below, there may be multiple corresponding instances of the transmission chain 900 and the receiving chain 903 at the base station.
[0126] Figure 5 is an example of a UE with a transmission chain generally indicated at 500, and a receiving chain usually indicated at 503. The transmitter and receiver of a UE may be similar to those at a base station although there is no programmer in the UE. Instead, the UE will receive programming information and / or resource allocation information, and will receive downlink transmissions according to the programming information received.
[0127] For efficient resource sharing, the transmission of latency-tolerant communication and sensitive latency communication can be programmed using the same resources or resources or time frequency overlays.
[0128] To allow improved latency to be provided for sensitive latency traffic compared to latency-tolerant traffic, latency-tolerant traffic has a longer scheduling interval than traffic
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22/45 sensitive latency.
[0129] Programming for sensitive latency traffic can be achieved by preempting resources that were originally programmed for latent-tolerant traffic. When this occurs, a preemption indication can be sent dynamically to notify the UE that it receives latency-tolerant traffic that part of its scheduled traffic is preempted or delayed. The base stations in Figures 1,2 and 4 are configured to generate and transmit preemption indications as described in this report. Base stations schedule traffic to UEs, with the option to preempt such scheduled traffic to transmit sensitive latency traffic. When preemption occurs, the base station sends the preemption indication. The UEs in Figures 1, 3 and 5 are configured to receive and process preemption indications as described in this report. The UE receives scheduled traffic. The UE also receives the preemption indications, and when the preemption indication indicates that the scheduled traffic has been preempted, the UE adjusts its reception of the scheduled traffic received to account for the preemption. Detailed examples are from the base station and UE functionality is provided below.
[0130] The preemption indication can be sent when sensitive latency traffic arrives, near the end of the latency-tolerant traffic schedule interval either within the range or near the beginning of the next interval, or at the beginning of another next interval, for example, when a retransmission is programmed after HARQ feedback.
[0131] The indication of preemption can be explicit or implicit, and can be specific to the UE or common to groups. The indications common to the group can be transmitted or multi-transmitted, for example. EMBB UEs can be configured to monitor the preemption indication. EMBB UEs can be configured via RRC signaling or a group-common PDCCH can notify a group of UEs if they need to monitor the preemption indication.
[0132] The preemption indication can indicate preemption at any time and / or frequency granularity.
[0133] In addition, sensitive latency traffic can use a
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23/45 minipartition (ie, number of symbols smaller than partition) to program the transmission.
[0134] A transmission resource for a given UE, for example, a time frequency resource programmed for transmission of a TB, may suffer preemption for the latency sensitive traffic in its entirety. When this is the case, the particular time frequency feature is considered to be preemptible. Alternatively, a portion of the time frequency resource may be preempted for sensitive latency traffic, for example, part of the specific OFDM symbols. In this case, the particular time frequency feature or these specific symbols are considered to be impacted by preemption. In each case, TB transmission is impacted by preemption.
[0135] In the following discussion, reference will be made to preemption, but it should be understood that in alternative modalities, the approaches provided can be applied to preemption impaction, or both for preemption and preemption impaction.
[0136] For the purpose of this description, a subsequent transmission can refer to any transmission after the initial transmission and that subsequent transmission can be programmed either before or after the HARQ feedback. A subsequent transmission is sometimes also called a retransmission. Alternatively, a subsequent transmission is considered only a retransmission if it is programmed after the HARQ feedback. The modalities described below are not limited to any specific definition of subsequent or retransmission, and generally apply in relation to any transmission after the initial transmission of a packet / TB or HARQ process.
UE specific downlink control (DCI) information format design
[0137] A first modality provides a design of downlink control information format to indicate preemption.
[0138] According to this modality, an indication of preemption is transmitted only in relation to an impacted resource of a transmission when a subsequent transmission is programmed after the impacted transmission. A preemption indication will not be sent if a transmission
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Subsequent 24/45 is not programmed.
[0139] One of the UE-specific downlink control (DCI) information formats are provided that include a field to indicate location frequency information of the impact / preemption area of the previous transmission.
[0140] The DCI format indicates the resources that were preempted in a previous transmission of the same HARQ process ID. An HARQ process includes an initial transmission and any subsequent retransmissions or transmissions.
[0141] The DCI format that includes a preemption indicator that includes at least the following fields:
HARQ process ID;
a field of N bits to indicate regions of time frequency of a previous transmission that suffered preemption. The value of N can be configurable.
[0142] In some modalities, the preemption indicator is sent only in relation to an impacted transmission for which there is a subsequent transmission. The DCI also program the subsequent transmission, and in some modalities, the existence of the preemption indicator also serves to indicate that the subsequent transmission is not a new transmission. Thus, optionally, an NDI field (new data indicator) can be omitted from the DCI format.
[0143] Fields in the DCI format can also be extended to schedule a subsequent transmission along with a new transmission. In this case, the DCI format allocates resources for both subsequent and new transmission. Consequently, according to one embodiment of the invention, the DCI format indicates, explicitly or implicitly, one or more of the following characteristics:
resources of time and / or frequency of preemptible / impacted areas of a previous transmission; for example, symbol indexes (s) of the impacted transmission. As mentioned above, an N bit field can be used to provide preemption information.
resource allocation of time frequency and / or HARQ ID of a partial / subsequent transmission / retransmission of the transport block (TB)
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25/45 preemptible / impacted; for example, resource allocation in a group of RBs and symbols / partitions.
time frequency resource assignment and / or HARQ ID for a new transmission - for example, resource allocation in a group of RBs and symbols / partitions.
[0144] A transmission (either an initial transmission or a retransmission) to a given UE is made up of one or more transport blocks. A transmission block is transmitted using resource blocks (RBs), each resource block being a defined time frequency resource. Optionally, resource blocks are organized into groups of resource blocks (RBGs). In addition, in some modalities, a TB is divided into blocks of code (CBs). Optionally, code blocks are organized into groups of code blocks (CBGs).
Example 1:
[0145] In a first example, there is a dedicated preemption indication field. This can, for example, be a field of N bits (N is configurable) that indicates preemption for a defined indication granularity. The indication granularity can, for example, be one of the following:
code block (CB);
code block group (CBG) symbol (s) symbol (s) and resource block group / part of bandwidth
[0146] For example, where the granularity is the code block group, the N bits indicate that the groups of N code blocks are preemptible. Note that a CBG can also be a CB, depending on the size of TB.
[0147] Any of the granularities mentioned above can be used to carry preemption information related to an impacted transmission from a UE. This information can be provided through UE-specific DCIs or in a UE-specific field or portion of a group-common signal / channel. Examples of channels and / or structures common to the group are provided later.
Example 2:
[0148] In a second example, instead of having a dedicated field, the preemption indication is based on one or more fields that have
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26/45 other purposes, such as modulation and coding scheme (MCS), redundancy version (RV) and others. For example, an initial transmission may use a first MCS that is one of the 28 MCS levels signaled with a five-bit MCS field. Note that in this report, 28 MCS are mentioned as an example only. For retransmission, a reduced set of MCS levels is possible, and can be signaled using less than the five bits. In this case, the unused bits can be used for some or all of the preemption indications.
[0149] In another example, an RV field is used to indicate preemption in relation to a previously programmed transmission. A VR of a TB contains a portion of encoded bits. When the data is encoded, the encoded bits can be partitioned into different sets that possibly overlap. Each set is a different RV. For example, some RVs may have more parity bits than other RVs. Each RV is identified by an RV index (for example, RV 0, RV 1, RV 2, ... etc.). One of the RV indices is indicated in the RV field. If a configured RV includes the preemption area, then this RV can be indicated and no other explicit indication is required.
[0150] Meanwhile, sending an RV of a TB based on the preemptive area! it can be inefficient if the amount of preemption is small and / or configured RVs do not correspond well to the pattern or amount of preemption. In this case, the number of bits in the RV field can be increased and more definitions or configurations of RVs can be sustained to better match the preemption area. In some embodiments, the configuration of an RV is based on a code block group. In one example, an RV can be composed of one or more groups of code blocks. If the CBG-based preemption indication is sustained, then an RV that best matches the area of impacted CBGs can be transmitted.
[0151] In one example, even if the UE decodes the impacted CBGs in the previous transmission, if a subsequent transmission is programmed where the impacted CBGs are transmitted, then the UE can update the decoding status of the impacted CBGs based on the transmission decoding and send HARQ feedback with the updated CBG decoding status.
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[0152] In an example, an RV field can indicate one of the options K, K being an integer K => 1. The M of K options can be used for TB level relay or subsequent transmission and the KM options can be used for CBG-based retransmission or subsequent transmission. If some RVs are built / configured as a function of CBGs, the upper layer signaling (for example, RRC) can notify the UE about the mapping between CBGs and RVs, that is, a given indicated RV relates to the CBG (s) (s). this can allow for a unified RV field construction that can be used for both CBG level relay and TB level relay. In another example, all K options can be used to indicate RV configurations based on CBG.
[0153] In one example, there are four bits in the RV field. A combination of four bits can refer to a different set of RVs for new and retransmissions. For example, if it is a new transmission, four bits can refer to a given set of RVs. If relaying, four bits can refer to a different set of RVs. These configurations are notified to the UE possibly before the RRC signaling.
[0154] In another example, a DCI format has a 4-bit RV field. The 4-bit RV field of a new transmission may indicate transmission at the TB level, even as in LTE, where an RV corresponds to a set of coded bits that form a TB. For retransmission, the 4-bit RV field can refer to retransmission at the CBG level where different RVs are mapped to different combinations of CBGs. For example, RV2 = {CBG2, CBG3}. If a UE supports transmission at the CBG level and / or HARQ feedback at the CBG level, it can be configured to read the RV field in this way. The number of bits in the RV field can be the maximum number of CBGs sustained or less. Based on a resource allocation field and MCS, the UE can determine the size of the transmission; however, there may be ambiguity about which CBGs are retransmitted after an initial transmission. The indication through the RV field can be useful to resolve this ambiguity.
[0155] In another example, the N bit explicit indication field notifies which CBGs have been preempted. The RV field can correspond to each CBG or to the entire transmission.
[0156] In another example, one or more bits in the RV field and one or more
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28/45 bits in the MCS field together can provide the preemption indication information of a configured granularity, for example, CBGs or symbol (s). Alternatively, such bits can also indicate which CBGs are being retransmitted. As mentioned above, a high dynamic range of MCS may not be necessary and some bits can be used for indication of preemption or purpose of CBG indication.
Example 3:
[0157] In a third example, the preemption indication is transmitted in a combination of a dedicated field, and one or more fields that have other purposes. For example, an explicit N-bit field and an RV field together can provide information on preemptible / impacted time and / or frequency resources. The impacted / preemptible portion can be programmed as a subsequent transmission.
[0158] In a specific example, there is a dedicated bit field that indicates whether the retransmission is based on preemption or not. Then, in the case of preemption, one or more other new or existing fields are used to indicate the preemption information. For example, if retransmission is taking place after a preemptive transmission !, then the field providing the preemption information may be based on the granularity of symbols or symbols and RBGs or other granularities mentioned above. If the retransmission is following feedback from HARQ, then the field can provide information about which CBGs are transmitted or which RV is transmitted. In a specific example, the RV field can indicate a group of symbols that have suffered preemption if the retransmission is based on preemption or programmed before HARQ feedback, whereas in other cases, the RV field can be used in a conventional way for TB-level transmission or CBG-level transmission or to indicate which CBGs are being transmitted. This can be useful if the subsequent transmission can be based on a different granularity than CBGs.
Example 4
[0159] In an additional example, there is only one bit that indicates whether a preemption has occurred or not.
UE-Specific Unified DCI Format
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[0160] In some embodiments, the UE-specific preemption indication described above is used both to indicate preemption and to indicate or facilitate retransmissions based on the received HARQ feedback. In a specific example, this can be used as a unified referral if CBGs are chosen as referral granularity. This can serve to indicate which CBGs are being retransmitted. It is unified in the sense that, at different times, the same DCI format is used to indicate a set of preemptible CBGs (and therefore will be retransmitted), and to indicate a set of CBGs being retransmitted, for example, based on in the HARQ feedback received previously. The HARQ feedback can be the feedback of several bits where each bit corresponds to the decoding state of a CBG. Therefore, these DCIs can be used before / in the absence of ACK / NACK based on preemption, or after receiving ACK / NACK. Note that in the event of an error in the ACK / NACK received, this indication in the DCIs can be used by the UE to identify which CBGs are being retransmitted and the CBGs retransmitted may be different from failed CBGs.
[0161] The indication of which CBGs are transmitted in a retransmission can be used in both uplink and downlink leases.
[0162] In another example, separate DCI formats are provided for retransmission and retransmission. DCIs that are used for retransmission may include fields for CBGs and / or preemption indication, which may not be needed in a DCI that schedules a new transmission. Similarly, the RV field in the DCIs that are used for retransmission can be used in a different way than the RV field in the DCIs used for retransmission. This is because the configuration of the RV field may be different for new and retransmission; the RV configuration for retransmission can be based on the CBG configuration. The RV field can have the same or different number of bits in the two DCIs that are used for new and retransmissions. In these cases, NDI bits may not be needed as separate DCIs are used for retransmission and retransmission.
DCI project if two processes programmed by the same concession [0163] As detailed above, in some modalities, a single
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DCI is used to program multiple UE HARQ processes. This can be based on CBG, or based on symbol or RB, for example. These may include programming for one or a combination of:
one or multiple retransmissions due to preemption;
one or more retransmissions based on feedback from HARQ;
one or more new streams.
[0164] This method can be more efficient than separate programming. For example, a single concession can schedule the subsequent retransmission / transmission of the HARQ process i and a new TB of a HARQ process j, where j + i.
[0165] For this mode, the DCI format supports at least the following:
indication of the ID of the HARQs processes, both for the HARQ retransmission process and for the new HARQ transmission process;
redundancy version information, both for the HARQ retransmission process and for the new HARQ transmission process;
indication, for example, that CBGs or previous transmission symbols are being retransmitted (optional) NDI bits for CBG-based retransmission (optional)
[0166] DCIs can include MCS and resource allocation fields that can be common across multiple HARQ process schedules. Note that multiple HARQ processes can be retransmitted along with multiple new HARQ processes, for example, via MIMO transmission. In such cases, the configuration details related to the MIMO transmission need to be transmitted, as well as for each HARQ process.
[0167] For example, DCIs can indicate the number of RBs allocated. The UE will know which CBGs have failed for the specified HARQ ID, and based on this, a mapping rule is applied to determine where the CBGs for the relay are located. For example, CBGs from a previous transmission can be transmitted on a first part of a partition. In this case, some padding can be applied so that the CBGs for retransmission complete an integer number of REs, and so that an RE does not contain bits from two HARQ process IDs. Based on the RV field with / without optional indication field and the
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31/45 mapping, the UE knows where the CBG resource allocation ends within the partition and can determine the REs allocated for retransmission. Resources for the new TB start immediately after those for retransmission.
[0168] In another example, if the explicit indication is given that CBGs or symbols from a previous transmission are retransmitted, the RV field for the retransmission may be omitted.
[0169] In another example, separate and / or explicit MCS and / or RV and / or time frequency allocation and / or NDI are provided for retransmission and retransmission on DCIs.
Common Signaling of Multiple Groups for Indication of Preemption
[0170] In another modality, a common group downlink control channel (PDDCH) is sent to all K symbols / partitions, or every X ms to notify preemption indication information. K is a positive integer. A group PDCCH is for multiple UEs. The monitoring period can be cell specific or group specific or UE specific and can be configured. In some embodiments, the location is not linked to any specific symbol or group of symbols on a partition, it can be any symbol and is configurable. The group-common PDCCH can have specific UE fields or common information that is read by all UEs that monitor the group-common PDCCH. X and / or K can be configured by upper layer signaling. Although group-common PDCCH is discussed in this report, it is understood that examples of group-common PDCCH content or how features in a group-common signal are configured / partitioned can be applicable to any group-common signal / channel regardless of structure. Examples of group-common signage are disclosed in US Patent Application No. ² . 62 / 475,762 filed on March 23, 2017 copending entitled “System and Method for Multiplexing Traffic”, which is incorporated by reference in this report.
[0171] There may be a common group PDCCH sent to an entire cell to notify the preemption indication. In one example, if the PDCCH common to the group is sent to all K symbols, which may contain the indication related to the preemptible / impacted areas of transmissions to the
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32/45 along a group of symbols that appeared before the symbol that contains the PDCCH common to the group. In one example, the group PDCCH may contain preemption indication information related to transmissions over the last K symbols.
[0172] In another example, if the PDCCH common to the group is sent for all K symbols, it can notify the UEs having continuous transmission that some parts of the resources programmed over a group of symbols to follow (this group of symbols can include the symbol containing the PDCCH common to the group) are preemptible and assigned to another DL transmission.
[0173] Depending on the length or duration of transmission, a UE can monitor several PDCCHs common to the groups where each PDCCH common to the group provides preemption information for a part of the programmed transmission duration.
[0174] In some embodiments, there are multiple PDCCHs common to groups within a cell, and some UEs are configured to observe one or multiple PDCCHs common to groups to collect preemption indication information for the UE. Multiple group PDCCHs to collect preemption information can be monitored by a UE in the same or different symbols. In some modes, eMBB UEs are configured in this way to monitor signaling.
[0175] In a specific example, the signaling common to the group has the structure represented in Figure 6 that includes N bits 1000, and a CRC check that is indicated by a temporary radio network identifier (RNTI). The RNTI indicates the purpose of the PDCCH as an indicator of preemption. The N bits contain time / frequency domain preemption for a defined or configured granularity for multiple UEs. Granularity can be just the time domain or frequency time domain. Time domain information can be based on symbols. The frequency domain information can be groups of RBs or part or subband of bandwidth. Note that these granularities can be used on any signal or channel common to the group.
[0176] In some embodiments, the N bits containing preemption information are divided into M fields, one or more of which may be specific to the UE. In this case, a given EU only needs to process
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33/45 the field (s) that is for him. If one or more fields are specific to the UE, different granularity options can be used for indication, for example, code block group, symbol (s), symbol (s) and RB group, symbol (s) and part of bandwidth, etc. Alternatively, as in previous modalities, one or more fields are not specific to the UE, but specific to the resource. A UE with knowledge of its programmed resources can use such fields to identify whether a preemption has occurred in the portion of its programmed resources.
[0177] In some embodiments, the signal transmitted previously (for example, RRC signaling) is used to inform each UE which portions of the N bit fields contain the indication for which the UE or which field (s) in the PDCCH group belong to a HUH. Alternatively, this information can be signaled dynamically. A UE can receive an indication in its DCIs which field (s) in one or more following PDCCHs common to the groups are configured for it. In another embodiment, a predetermined mathematical relationship is used to determine where / which field in the PDCCH common to the group, referral information is sent to each UE. In a specific example, the sign common to the group contains M fields.
[0178] The information for a given UEk is in the position determined by:
mod (ik, M) + displacementk where ik is the position of the first resource block or a reference resource block (RB) among the RBs allocated to the UEk, and displacementk is a specific displacement of the applied UE. The offset is applied so that each UE has a different position, representing the operation of module Μ. The offset can be displayed dynamically in the DCIs. If M or fewer UEs are programmed, then, through the use of offsets, each UE has a unique position within the DCIs. As the PDCCH common to the group has M fields in this mode, a BS can be configured to the UEs M to monitor the PDCCH common to the group. The applied offset, displacementk, can be from 0 to M -1 and log2M bits can be used as a field.
[0179] In one example, the DCIs of a transmission can have multiple parts or stages. In one example, DCIs can have two parts.
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The first part of the DCIs provides programming information for the transport block and comes at the beginning of the transmission interval or duration. A second part of the DCIs, which may come near the end of the interval, notifies the UE of any preemption that occurred during the scheduled transmission. If preemption notification is received, the UE can monitor a group-common PDCCH on one or more of the subsequent symbols, otherwise it does not need to monitor. The second part of the DCIs can also contain the displacement information mentioned above, if there is no dedicated field configured for the UE in a group-common PDCCH that provides information about preemptive time and / or frequency area. BS can notify even the UEs M in the case of a preemption if the PDCCH common to the group has M fields.
[0180] In another example, the indication of preemption of an impacted time and / or frequency area can be provided in the DCIs of a subsequent UE transmission. The first and second parts of the DCIs may include other information or fields required as well as for the appropriate uplink and / or downlink transmission.
[0181] In some modalities, multiples of the PDCCHs common to the group can be sent to all partitions or after each period of a certain duration. In some embodiments, the same content is sent on each of the multiple PDCCHs sent to all partitions. Alternatively, each of the PDCCHs can contain different content, the latter approach being more efficient for an UE that has a limited UE BW.
[0182] In some embodiments, a cell bandwidth is partitioned into bandwidth partitions, and a respective PDCCH common to the group is sent to each of a plurality of bandwidth partitions. The transmission of a UE can occupy frequency resources that are part of one or more of the plurality of bandwidth partitions. A given UE only needs to monitor the PDCCH (s) that are related to the bandwidth partitions that overlap with the given transmission of the UEs. In this case, different contents can be sent in each of the common PDDCHs containing L bits of time frequency information to a granularity defined or configured in the time domain and / or
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35/45 frequency.
[0183] Figure 7 shows an example where a group PDCCH is sent to each partition at the beginning of the partitions. Partitions 1100,1102,1104,1106,1108 are shown containing PDCCH common to group 1120, 1122, 1124, 1126, 1128. UE eMBB 1 (a UE having 1140 resource allocation) will need to monitor the PDCCH common to group 1122, 1124 UE eMBB 2 (a UE having resource allocation 1142) will need to monitor the PDCCH common to group 1122, 1124, 1126, 1128. UE eMBB 3 (a UE having resource allocation 1146) will need to monitor the PDCCH common to group 1126.
[0184] Figure 8 shows an example where a PDCCH common to the group is sent to each second partition at the beginning of the partitions. Partitions 1100,1102,1104,1106,1108 are shown. The first, third and fifth partitions contain the PDCCH common to group 1220, 1222, 1224. UE eMBB 1 (a UE having resource allocation 1140) will need to monitor the PDCCH common to group 1222. UE eMBB 2 (a UE having resource allocation) 1142) will need to monitor the PDCCH common to group 1222,1224. UE eMBB 3 (a UE having resource allocation 1146) will need to monitor the PDCCH common to group 1224.
Location for sending common PDCCH to group
[0185] In some implementations, any symbol can have a PDCCH region configured. In some embodiments, one or multiple PDCCH messages common to the group are transmitted to all K symbols. The location of the group PDCCH message can be within a PDCCH region otherwise defined on a partition or outside, for example, the symbols containing the shared packet data channel (PDSCH) of the partition.
[0186] Multiple sets of PDCCH messages common to groups can be sent at different intervals. For example, a first set can be transmitted for all K symbolsí, while a second set is transmitted for all K symbols2. One group of UEs can monitor all K symbolsí, while another group of UEs monitor all K symbols2.
[0187] More generally, some control feature set (s) can be configured to all K symbols to contain PDCCH common to group to send the preemption indication. The set of control features
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36/45 PDCCH common to group can be located within the PDCCH region of a symbol. This symbol can contain the partition-based transmission control feature sets. This symbol can contain the mini-partition or symbol-based transmission control feature sets. This symbol can contain the two items above.
[0188] In some embodiments, the PDCCH common to the group falls within the PDSCH of an eMBB transmission, and the UE is configured with the following behavior:
the UE blindly detects the indication in the pre-configured search space that can be used for PDSCH transmission; or reserved location, preconfigured control feature set area is avoided for PDSCH programming; or
[0189] PDCCH common to group is overlaid with the PDSCH transmission. The MIMO transmission can be used in the overlapping region, or non-orthogonal multiple power domain (NoMA) access or NoMA code domain.
Another Possible Structure for Common Channel to Group
[0190] In one example, the group-common channel containing preemption information cannot be attached to a CRC, as in a conventional PDCCH message. Instead, a group-common channel can be based on a sequence. Some examples include channel structures from PUCCH or PHICH or PCFICH. The same for the group-common PDCCH channel, a group-common channel having a different structure from PDCCH, can have common information that is sent to a group of UEs or the group-common signal can have specific UE bits or fields . If it is based on a sequence, a code word can be generated that contains preemption information. The code word can contain both common information for a group of UEs and code words can be partitioned into sets of bits, where each set of bits contains preemption information for a UE. As mentioned above, one or multiple signals / channels common to the group can be configured to appear in any symbol and can be transmitted in a configured search space that may or may not overlap with data transmission.
[0191] Note that a signal / channel common to a group can cover a
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37/45 symbol or a group of continuous (that is, contiguous) or non-contiguous symbols.
Transmission of Multiple Inputs and Multiple Outputs of Multi-User (MU-MIMO)
[0192] Existing DL multiplexing approaches are based on energy domain preemption or overlapping methods. In another modality, instead of preemption, MU-MIMO transmission is used such that multiple layers of MIMOs are available to transmit latent-tolerant and intolerant traffic. The network can transmit both latency-tolerant traffic and sensitive latency traffic over different MIMO layers in shared time frequency resources. The mere existence of latency-intolerant traffic in one or more of the layers can affect the performance of latency-tolerant traffic. For example, an eNB can transmit URLLC traffic at different MIMO layers in a time frequency region that overlaps with an eMBB transmission. A UE URLLC may not be impacted, as the BS is aware of the continuous transmission programmed in the overlapping time frequency region, and will configure its beamforming matrices accordingly, based on the known interference scenario. However, an eMBB UE may be impacted, as the beamforming matrices configured for the eMBB transmission duration may not be appropriate for the impacted region.
[0193] In some modalities, an indication message is sent to the UE eMBB with time and / or frequency and / or bundles related to information from the impacted regions. This message can also provide an update on the beam formation and / or interference channel information to facilitate the cancellation of interference by the UE eMBB.
[0194] In some modalities, the information related to the demodulation reference signal (DM-RS) used by the BS to send data to the UE URLLC is indicated to the eMBB user in order to cancel the interference caused by the URLLC transmission in the block impacted eMBB transmission (TB). Such information may comprise, the time, frequency, code, sequence resources used to send the URLLC DM-RS. In some cases, less signaling overhead may be required if the UE eMBB blindly detects the URLLC DM-RS. For example, if the UE eMBB already knows
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38/45 the set of possible DM-RS ports, it can blindly perform decoding assuming all these possibilities without the need to signal the DM-RS port for URLLC transmission, at the cost of more complex decoding operations in UE eMBB.
[0195] In some modalities, information related to the related is signaled to the UE, such as information about which transmission beam (for example, beam index) was used by the transmitter to send the URLLC data. The beam-related information can also be related to the receiving beam in the UE, especially in the cases of high frequency where the beam formation is generally carried out both on the transmitter side and on the receiver side to obtain a better connection quality. In such a case, the beam-related information can actually tell the UE which receiving beam can be used to reduce the impact caused by the URLLC transmission.
[0196] An example is shown in Figure 9. A 1300 resource programmed for eMBB transmission is shown. Later, a 1302 resource is scheduled for URLLC traffic. This is not preemptive !, but uses a different MIMO layer. However, the existence of URLLC traffic will affect the UE eMBB's ability to receive its transmission. An indication 1304 is sent at the beginning of a next eMBB 1305 transmission. The location of the indication shown in this report is just an example.
[0197] In another example, the indication may be located on any symbol, for example the symbol (s) where URLLC traffic arrives, or any other subsequent symbol that may be within or outside the impacted transmission duration. All possible locations of the PDCCH specific to the UE or PDCCH group discussed above may apply in this report. If the referral comes on a specific EU PDCCH, it can arrive when the UE receives its next PDCCH.
DCI Format Project to indicate duration
[0198] In another embodiment, a DCI format to indicate the initial position and / or duration of a symbol-based and / or partition-based transmission is provided, existing DCI formats for the symbol-based transmission indicate a length, but the starting position is predefined, for example, from the next symbol after the control is located. THE
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39/45 length can also be indicated through an upper layer. [0199] However, in some implementations, data may start at the control symbol or some other later symbols. In another embodiment, a DCI format to indicate the initial position and length is provided. In some modalities, possible K values for starting position are configured for the upper layer signaling, and a specific one is a signaling to the UE in the DCIs. Alternatively, the starting position is notified through the upper layer signaling and is not included in the DCIs. The length indicates the duration from the starting position. The length can be indicated as the number of symbols, number of partitions, or a combination of number of symbols and / or partition (s).
[0200] The following is a specific example of a format to indicate the initial position and length in symbols or partitions (although the same approach can be used for other granularities, for example, contiguous symbol group or contiguous partition group) :
bit field log2K to indicate one of the possible initial K positions, K can be configurable, or be transmitted in another field; (optional, the starting position can also be notified via the upper layer) field to indicate the granularity - for example, flag: 0/1 where 0 granularity is symbol, 1-> granularity is partition; the flag indicates the granularity for the length indication and can be sent in DCIs or notified through the upper layer signaling, for example, RRC signaling;
field containing log2M bits to indicate the length, in the granularity indicated by the flag. M can be configured.
[0201] The field containing the starting position is an optional field. If the start position is pre-configured, it may be necessary to signal the DCIs. The K starting positions can also indicate the position of a symbol or a partition from which the duration of the initial data begins. The UE can be configured through the upper layer to understand whether the notification of a value sent in the home position field indicates a symbol or a partition. In an example, two K = 2 options can be indicated, whether the data can start from the same control symbol or the next symbol, if
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40/45 this where 1 bit is sufficient. In another example, where the transmission is aggregated to a partition, two K = 2 options can be indicated, whether the data starts on the same partition where control is received or from the next partition. K can also include a combination of location in terms of symbols and partitions. In one example, K = 4 options are supported as a starting position. K = {1,2, 3, 4}
K = 1 Data starts from the same symbol as the control K = 2 Data starts from the next symbol after the control K = 3 Data starts from the second next symbol after the control K = 4 Data starts from the next partition
[0202] In another modality, a DCI is provided that indicates lengths in symbols, partitions or combinations thereof. DCIs include the following fields:
bit field log2K to indicate the starting position, K can be configurable (optional field, can also be pre-configured or notified via the upper layer);
field containing log2J bits to indicate length, in the granularity of partitions, J can be configurable;
field containing log2N bits to indicate length, in the granularity of symbols, N can be configurable.
[0203] This example can indicate the length of any combination of symbols and partitions.
Example 1:
[0204] In a first example, a partition length is 7 symbols, the number of symbols is up to 6 (configurable), and the number of partitions that can be aggregated is up to 4 (configurable). An indication of a duration greater than 7 is obtained as an aggregation of symbols from 1 to 6 and partition (s). Figure 10 shows an example where 9 symbols are indicated, and the starting position is the 6 ² symbol for the partition. The indication refers to a mini-partition 1400 containing two symbols and a partition 1402.
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Example 2:
[0205] In a second example, again there is a partition length of 7 symbols, the number of symbols is up to 12, and the number of partitions is up to 4 (configurable). Figure 11 shows an example, where 16 symbols are indicated, and the starting position is the 4 ² symbol for the partition. The indication refers to nine symbols and a partition. In this case, the nine symbols are divided between a first minipartition 1500 and a second minipartition 1504 before and after partition 1502.
[0206] The second format can support the indication of the length of minipartition (s) + partition (s) or minipartition + partition (s) + minipartition. As the UE knows where the control feature set is located where the partition boundary is, the length indication is sufficient and the exact order of symbols or partitions may not need to be indicated.
Unified Programming Format
[0207] In some embodiments, a DCI format for symbol-based transmission and partition-based transmission that is unified. One or more of the following fields can be configurable for programming based on partition and symbol.
Data length / duration indication (K1 options)
DM-RS configuration or antenna port indication (K2 options)
Indication of the starting position for data duration or time indication between the granting of DL grant and when the DL data transmission is started (K3 options)
Time indication between UL grant assignment and when UL data transmission starts (K4 options)
Indication of time between receipt of DL data and corresponding confirmation / negative confirmation (A / N) (K5 options)
[0208] In this report, Ki, i = {1,2, .., 5}, the options for the cases are chosen from a set of values that is configured by the upper layer. In one example, both symbol-based traffic and partition-based traffic can receive the same DCIs where A / N timing is indicated in the K5 options. The actual options may differ for mini-partition and partition-based traffic. UEs are configured through the top layer to map which option to which value. For example, the option
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42/45 can correspond to a two-symbol delay for mini-partition-based traffic which, however, corresponds to a 2-partition delay for partition-based traffic. If a UE supports both minipartite-based traffic and partition-based traffic, then the K5 options are configured such that some options can refer to time based on symbol (s) and some options can refer to the partition-based time. Similar examples can be used for the other four categories mentioned above.
DL Control Signaling to Modify a Previous Concession
[0209] In one embodiment, the network sends a first DL control signal that contains a concession for both a UL and DL transmission of a packet or UE. At least a second DL control signal is sent later to modify the lease that was previously assigned to the same package or to a UE. The second DL control signal can arrive before or after the UL or DL transmission is initially programmed. The first DL control signaling can be UE specific. The second DL control signaling can be UE-specific or group-common, that is, transmission or multi-transmission. The modification of the assigned concession can be discarded from the concession for the entire programmed transmission, modify the time frequency resources originally assigned to all or part of the programmed transmission, suffering preemption or postponing part of the resources assigned to the programmed transmission, adjusting transmission parameters, for example, MCS, power or RV or repetition number. The UE can be configured (for example, by RRC signaling) to monitor at least one subsequent control signal that can be sent to modify the previously allocated concession.
Mini-Partition Programming
[0210] In some existing systems, programming is carried out in a way that avoids reserved resources. For example, eMBB bandwidth can also contain channels containing important system information, for example, PS, SS, PBCH, SIB, Pagination. The expected URLLC UEs that are to be programmed in this BW can be informed of these reserved resources, for example, through the upper layer or another
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43/45 transmission signaling. The UE can receive this information through initial configuration, or through RRC signaling. Consequently, the UE receives data about a region that includes some reserved resources, the UE may not expect the transmission of data about the reserved resources and the data transmission may correspond to the rate around the reserved REs / symbols.
[0211] In some modalities, the DCIs of a minipartition can dynamically avoid programming the minipartite traffic on these REs for reserved resources. This avoids the frequency band assigned to common channels, such as the synchronization channel and transmission channel. In this report, minipartition refers to transmission based on symbol (s).
[0212] Signaling can be transmitted to indicate the location of pre-reserved frequency resources for common channels. This flag can also be used to notify the UELCLC control eMBB and / or DMRS location, and notify the UE that their data cannot be preempted by these resources.
Avoidance of Minipartition Control by Partition Traffic
[0213] In some embodiments, traffic based on a mini-partition (for example, URLLC) can be programmed during a partition-based continuous transmission (for example, eMBB). Each n symbol within the partition can contain sets of UE control resources based on a minipartition (n = 1, 2, 3, etc.). An example is shown in Figure 12 where the control resources 1600 are reserved on each second symbol.
[0214] In some embodiments, when partition-based traffic is programmed, partition-based traffic is programmed including the mini-partition control region. If minipartite traffic is programmed, a preemption indication is transmitted that indicates that the region is preempted by minipartite control and / or minipartite traffic.
[0215] In another modality, mini-partition control regions are avoided when partition-based traffic is programmed. In this case, some locations for mini-partition control monitoring symbols can be pre-configured and transmitted to all UEs in a semi-static manner. They can also be signaled from the signaling
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44/45
RRC.
[0216] A partition-based UE receives the transmission information, and knows the locations of the mini-partition control feature sets. If the partition-based UE is programmed with overlapping resources, the partition-based UE assumes that no data is sent over these areas. The mini-partition control feature set can include both the specific UE and a common group control (for example, A / N for concession-free transmission).
[0217] In another modality, a flexible mini-partition programming method is provided. In this modality, a control region, for example, both in the PDCCH region and in the PDSCH region, can be reused or avoided, based on the fact that the control region is being used or not. The pre-configured areas for control in PDSCH, for example, system information, indication signaling, DMRS etc. are avoided.
[0218] A mini-partition DCI can allocate resources in the physical resource block (PRB) granularity and symbol.
[0219] Example: 1 ² 12 RB symbol is used, 2 ² 10 RB symbol is used. Consequently, a bitmap can be flagged for the allocation of time and frequency resources, where the bitmap granularity in time and frequency can be configurable, for example, symbol or symbol group and RB or RBG, etc.
[0220] This may result in increased overhead, but may be necessary if the UE based on minipartition is not aware of the ignored resources. For example, the preemption indication may be signaled at the end of a partition and the preemption indication REs may need to be dynamically avoided when the minipartite traffic is programmed. In another example, the minipartition programming assumes that the REs containing the preemption indication are reserved and consequently, the UE based on the minipartition would not receive data on these REs even if these areas are included in the resource allocation, that is, dynamic indication to avoid these REs they will not be necessary if these areas are known in advance.
[0221] An example is shown in Figure 13 that shows a 7-symbol partition. There is an area 1700 that is a region of control of
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45/45 unused minipartition and an area 1702 which is a used minipartition control region. In this situation, eMBB traffic can use the resources that overlap the used control area 1700, but it should avoid the resources that overlap the used control area 1702. A preemption indication is sent in 1704 to indicate that eMBB traffic is preemptive! in the 1702 region.
[0222] Several modifications and variations of this disclosure are possible in light of the above teachings. Therefore, it should be understood that within the scope of the appended claims, disclosure may be practiced in a manner that is not specifically described in this report.

权利要求:
Claims (54)
[1]
1. Method, comprising:
all K symbols, in a physical downlink control channel (PDCCH) common to a group, transmitting an indication of preemption common to a group in relation to a group of K symbols preceding a symbol containing the indication of preemption common to a group;
the indication of preemption common to a group indicating, in the group of K symbols, which resources are preemptible.
[2]
2. Method according to claim 1, in which transmitting the preemption indication common to the group comprises transmitting using a set of control resources within the physical downlink control channel common to the group.
[3]
A method according to claim 1 or 2, further comprising:
transmit a setting of a value to K via upper layer signaling.
[4]
Method according to any one of claims 1 to 3, wherein for each indication of preemption common to the transmitted group, the group of K symbols is the last K symbols preceding the symbol containing the information of preemption indication common to group.
[5]
A method according to claim 2, further comprising:
transmit upper layer signaling by configuring the set of control features to be used to transmit the preemption indication.
[6]
6. Method according to claim 1, in which the group preemption indication contains N bits, each bit indicating preemption to a granularity defined in time and / or frequency.
[7]
A method according to claim 6, further comprising:
transmit signaling that configures the defined granularity.
[8]
8. Method according to claim 1, wherein:
the group preemption indication contains multiple fields;
the method further comprises transmitting signaling to a UE indicating which of the multiple fields are relevant to the UE.
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2/8
[9]
A method according to any one of claims 1 to 8, further comprising:
transmit a respective preemption indication common to the group for each one among a plurality of parts of bandwidth.
[10]
A method according to any one of claims 1 to 9, wherein:
when the preemption indication is one of a first set of values, the preemption indication indicates preemptible resources that are contiguous; and when the preemption indication is one of a second set of values, the preemption indication indicates non-contiguous preemptible resources.
[11]
11. Method in a user equipment (UE), the method comprising:
all K symbols, in a group downlink control channel (PDCCH) common to a group, receiving an indication of preemption common to a group in relation to a group of K symbols preceding a symbol containing the indication of preemption common to a group;
the indication of preemption common to a group indicating, in the group of K symbols, which resources are preemptible.
[12]
12. The method of claim 11, wherein receiving the group preemption indication comprises receiving using a set of control resources within the group downlink control channel common to the group.
[13]
13. The method of claim 11 or 12, further comprising:
receive a setting of a value for K through upper layer signaling.
[14]
14. Method according to any one of claims 11 to 13, wherein for each group preemption indication received, the group of K symbols is the last K symbols preceding the symbol containing the preemption indication information common to group.
[15]
A method according to any one of claims 11 to claim 14, further comprising:
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3/8 receive upper layer signaling configuring the set of control features to be used to transmit the preemption indication.
[16]
16. The method of claim 11, wherein the preemption indication common to a group contains N bits, each bit indicating preemption to a granularity defined in time and / or frequency.
[17]
17. The method of claim 16, further comprising:
receive signaling that configures the defined granularity.
[18]
18. The method of any one of claims 11 to 17, wherein:
the group preemption indication contains multiple fields;
the method further comprises receiving signaling indicating which of the multiple fields are relevant to a UE receiving the signaling.
[19]
19. Method according to any one of claims 11 to 18, in which a respective group preemption indication is transmitted to each of a plurality of bandwidth parts, the method comprising the UE that monitors any indication of bandwidth. common group preemption for the parts of bandwidth used by the UE.
[20]
A method according to any one of claims 11 to claim 19, wherein:
when the preemption indication is one of a first set of values, the preemption indication indicates preemptible resources that are contiguous; and when the preemption indication is one of a second set of values, the preemption indication indicates preemptible resources that are non-contiguous.
[21]
21. Base station, comprising:
a transmission chain configured to, all K symbols, in a group downlink control (PDCCH) channel common to group, transmit a group preemption indication in relation to a group of K symbols preceding a symbol containing the indication from common preemption to group;
the indication of preemption common to the group indicating, in the group of K
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4/8 symbols, which features are preemptible.
[22]
22. Base station according to claim 21, further comprising:
a programmer configured to program resources for first downlink traffic;
the transmission chain further configured to transmit the first programmed downlink traffic subject to preemption, and to transmit second downlink traffic by preemption of resources to the first downlink traffic.
[23]
23. Base station according to claim 21 or 22, wherein the transmission chain is configured to transmit the preemption indication common to the group using a set of control resources within the common downlink control channel common to group.
[24]
24. Base station according to any one of claims 21 to 23, additionally configured to transmit a configuration of a value for K via upper layer signaling.
[25]
25. Base station according to any one of claims 21 to 24, wherein for each preemption indication common to the transmitted group, the group of K symbols is the last K symbols preceding the symbol containing the preemption indication information common to group.
[26]
26. Base station, according to claim 23, additionally configured to transmit upper layer signaling by configuring the set of control resources to be used to transmit the preemption indication.
[27]
27. Base station according to any one of claims 21 to 26, in which the preemption indication common to the group contains N bits, each bit indicating preemption to a defined granularity in time and / or frequency.
[28]
28. Base station according to claim 27, additionally configured to transmit signaling that configures the defined granularity.
[29]
29. Base station according to claim 21, in which:
the group preemption indication contains multiple fields;
the base station additionally configured to transmit
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5/8 signaling to a UE indicating which of the multiple fields are relevant to the UE.
[30]
Base station according to any one of claims 21 to 29, additionally configured to transmit a respective preemption indication common to the group for each of a plurality of parts of bandwidth.
[31]
31. Base station according to any one of claims 21 to 30, wherein:
when the preemption indication is one of a first set of values, the preemption indication indicates the preemptible resources that are contiguous; and when the preemption indication is one of a second set of values, the preemption indication indicates the preemptible resources that are non-contiguous.
[32]
32. User equipment (UE) means user equipment comprising:
a receiving chain configured for, all K symbols, on a group-common physical downlink control (PDCCH) channel, receives a group preemption indication relative to a group of K symbols preceding a symbol containing the indication from common preemption to group;
the indication of preemption common to a group indicating, in the group of K symbols or partitions, which resources are preemptible.
[33]
33. User equipment according to claim 32, wherein:
the receiving chain is configured to receive uplink scheduling information that schedules first downlink traffic to the UE;
the receiving chain comprising a subcarrier demapper that performs subcarrier demapping based on received uplink programming information, also taking into account the preemption indication common to the received group.
[34]
34. User equipment according to claim 32 or 33, wherein the receiving chain is configured to receive the indication of
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6/8 group preemption per receive using a set of control features within the group downlink control channel common to the group.
[35]
35. User equipment according to any one of claims 32 to 34, additionally configured to receive a setting of a value for K via upper layer signaling.
[36]
36. User equipment according to any one of claims 32 to 35, wherein for each preemption indication common to the group received, the group of K symbols is the last K symbols preceding the symbol containing the preemption indication information common to group.
[37]
37. User equipment according to any of claims 32 to 36, additionally configured to receive upper layer signaling by configuring the set of control features to be used to transmit the preemption indication.
[38]
38. User equipment according to any one of claims 32 to 37, wherein the preemption indication common to a group contains N bits, each bit indicating preemption to a defined granularity in time and / or frequency.
[39]
39. User equipment according to claim 38, additionally configured to receive signaling that configures the defined granularity.
[40]
40. User equipment according to any of claims 32 to 39, in which:
the group preemption indication contains multiple fields;
user equipment additionally configured to receive signaling indicating which of the multiple fields are relevant to a UE that receives signaling.
[41]
41. User equipment according to any one of claims 32 to 40, wherein a respective indication of common group preemption is transmitted to each of a plurality of bandwidth parts, the user equipment additionally configured to monitor any indication of common group preemption for the parts of bandwidth used by the UE.
[42]
42. User equipment, according to any of the
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7/8 claims 32 to 41, wherein:
when the preemption indication is one of a first set of values, the preemption indication indicates the preemptible resources that are contiguous; and when the preemption indication is one of a second set of values, the preemption indication indicates the preemptible resources that are non-contiguous.
[43]
43. The method of claim 1, wherein the group preemption indication contains multiple specific resource fields.
[44]
44. The method of claim 1, wherein the group preemption indication uses a temporary radio network identifier (RNTI) to indicate that the PDCCH is a preemption indication.
[45]
45. The method of claim 11, wherein the group preemption indication contains multiple specific resource fields.
[46]
46. The method of claim 11, wherein the group preemption indication uses a temporary radio network identifier (RNTI) to indicate that the PDCCH is a preemption indication.
[47]
47. Base station according to claim 21, wherein the preemption indication common to group contains multiple specific resource fields.
[48]
48. Base station according to claim 21, in which the group preemption indication uses a temporary radio network identifier (RNTI) to indicate that the PDCCH is a preemption indication.
[49]
49. User equipment according to claim 32, wherein the group preemption indication contains multiple specific resource fields.
[50]
50. User equipment according to claim 32, wherein the group preemption indication uses a temporary radio network identifier (RNTI) to indicate that the PDCCH is a preemption indication.
[51]
51. Base station, comprising:
means to transmit, all K symbols, in a group downlink control channel (PDCCH) common to group, an indication of preemption common to group in relation to a group of K symbols preceding
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8/8 a symbol containing the indication of preemption common to the group;
the indication of preemption common to a group indicating, in the group of K symbols, which resources are preemptible.
[52]
52. User equipment (EU), comprising:
means for receiving, all K symbols, in a group downlink control channel (PDCCH) common to a group, an indication of preemption common to a group in relation to a group of K symbols preceding a symbol containing the indication of preemption common to group;
the indication of preemption common to a group indicating, in the group of K symbols or partitions, which resources are preemptible.
[53]
53. Base station apparatus, configured to carry out the method as defined in any of claims 1 to 10.
[54]
54. User equipment apparatus (UE), configured to carry out the method as defined in any of claims 11 to 20.

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公开号 | 公开日

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EP3616460B1|2021-09-08|

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RU2760212C2|2021-11-22|

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AU2018262843B2|2021-02-25|

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US20210058937A1|2021-02-25|

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RU2019138974A|2021-06-03|

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AU2018262843A1|2020-01-02|

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KR102303055B1|2021-09-16|

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US20180324816A1|2018-11-08|

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CN110603883A|2019-12-20|

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EP3616460A1|2020-03-04|

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KR20190140038A|2019-12-18|

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RU2019138974A3|2021-08-05|

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EP3616460A4|2020-05-20|

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JP2020519139A|2020-06-25|

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WO2018201841A1|2018-11-08|

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