channel backup signal with new radio pdcch waveform

专利摘要:
Techniques are provided for a channel backup signal design with a new radio downlink control (nr) physical channel waveform. a method for wireless communication includes determining one or more orthogonal frequency division multiplexing (ofdm) symbols to transmit channel reserve signals, and determining a plurality of resources available for transmitting channel reserve signals during the symbol ( or symbols) of ofdm. The method further includes selecting a resource pool within a plurality of resources for transmitting a channel reserve signal, and transmitting the channel reserve signal in the selected resource pool for reserving a spectrum portion for communication. another method for wireless communication includes determining ofdm symbol (or symbols) to monitor channel reserve signals, determining a plurality of resources available for monitoring the channel reserve signals during ofdm symbol, and monitor one or more channel reserve signals transmitted in a resource pool within the plurality of resources.
公开号:BR112019011369A2
申请号:R112019011369
申请日:2017-11-22
公开日:2019-10-15
发明作者:Sun Jing；Adel Kadous Tamer
申请人:Qualcomm Inc；
IPC主号:

专利说明:

NEW RADIO CHANNEL SHAPE CHANNEL RESERVE SIGN
CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of provisional patent application η ^Ω of series US 62 / 435,570, filed on December 16, 2016, and patent application No. US 15/708, 949, filed on September 19, 2017, both of which are expressly incorporated into this document as a reference, in their entirety.
BACKGROUND
I. Field of Revelation [0002] Aspects of the present disclosure generally refer to wireless communications systems and, more particularly, to a channel reservation signal design based on a physical downlink control channel ( PDCCH) of new radio (NR).
II. Description of the Related Art [0003] Wireless communication systems are widely deployed to provide various telecommunication services, such as telephony, video, data, message and broadcasts. Typical wireless communication systems can employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (for example, bandwidth, transmission power). Examples of such multiple access technologies include Long Term Evolution (LTE) systems,
access multiple per division in code (CDMA), systems in access multiple per division in time (TDMA), systems in access multiple per division in frequency (FDMA), systems
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2/61 orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access systems (SC-FDMA) and time division synchronized code division multiple access systems (TD-SCDMA) .
[0004] In some examples, a wireless multiple access communication system may include multiple base stations, each of which supports communication simultaneously to multiple communication devices, otherwise known as user equipment (UEs). In an LTE or LTE-A network, a set of one or more base stations can define an eNodeB (eNB). In other examples (for example, on a 5G or next generation network), a wireless multiple access communication system may include multiple distributed units (DUs) (for example, edge units (EUs), edge nodes (ENs) , radio heads (RHs), intelligent radio heads (SRHs), receiving and transmitting points (TRPs), etc.) in communication with various central units (CUs) (for example, central nodes (CNs), node controllers (ANCs), etc.), where a set of one or more distributed units, in communication with a central unit, can define an access node (for example, a new radio base station (NR BS), a new radio B node (NR NB), a network node, 5G NB, gNB, etc.). A base station or DU can communicate with a set of UEs on downlink channels (for example, for transmissions from a base station to a UE) and uplink channels (for example, for transmissions from UE for a base station or distributed unit).
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3/61 [0005] These multiple access technologies have been adopted in several telecommunication standards to provide a common protocol that allows different wireless devices to communicate at a municipal, national, regional and even global level. An example of an emerging telecommunication standard is the new radio (NR New Radio), for example, 5G radio access. NR is a set of improvements to the mobile LTE standard promulgated by the Third Generation Partner Project (3GPP). It is designed to better support mobile broadband Internet access by improving spectral efficiency, reducing costs, improving services, using a new spectrum and better integration with other open standards using OFDMA with a cyclic prefix (CP) on the downlink (DL) and on the uplink (UL), as well as support beam formation, multiple input and multiple output antenna technology (MIMO) and carrier aggregation.
[0006] However, as the demand for access to mobile broadband continues to increase, there is a need for further improvements in NR technology. Preferably, these enhancements should apply to other multiple access technologies and to the telecommunication standards that employ these technologies.
[0007] As demand for mobile broadband access continues to increase, the use of shared radio frequency spectrum (SRFS), which may include unlicensed radio spectrum (URFS), has been considered to help solve the problem of spectrum congestion for wireless needs
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4/61 future, not only to meet the growing demand for access to mobile broadband, but also to advance and intensify the user experience with mobile communications. However, SRFS can load other broadcasts, so techniques such as listen before speaking (LBT) and free channel assessment (CCA) can be used in an effort to prevent excessive interference. In certain scenarios, wireless devices that operate on a shared spectrum can be asynchronous. It may be desired to mitigate interference caused by wireless devices operating in the shared spectrum.
SUMMARY [0008] The systems, methods and devices of the revelation each have several aspects, none of which is exclusively responsible for their desirable attributes. Without limiting the scope of this disclosure as expressed by the following claims, some features will now be discussed briefly. After considering this discussion and, in particular, after reading the section entitled Detailed Description, it will be understood how the characteristics of this disclosure provide advantages that include improved communications between access points and stations on a wireless network.
[0009] Techniques for transmitting a channel reservation signal based on a new radio downlink control (PDCCH) physical channel waveform (NR) are described in this document.
[0010] Certain aspects of the present disclosure provide a method that can be carried out, for example, through an apparatus (e.g., base station,
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5/61 user equipment, etc.). The method generally includes determining one or more orthogonal frequency division (OFDM) multiplexing symbols for transmitting channel reserve signals. The method also includes determining a plurality of resources available for transmitting the channel reserve signals during the one or more OFDM symbols. The method further includes selecting a set of resources within the plurality of resources for transmitting a channel reservation signal. The method further includes transmitting the channel reservation signal in the selected set of resources to reserve a portion of spectrum for communication.
[0011] Certain aspects of the present disclosure provide a device for wireless communication. The apparatus generally includes means for determining one or more orthogonal frequency division (OFDM) multiplexing symbols for transmitting channel reserve signals. The apparatus also includes means for determining a plurality of resources available for transmitting the channel reserve signals during the one or more OFDM symbols. The apparatus further includes means for selecting a set of resources within the plurality of resources for transmitting a channel reserve signal. The device also includes means for transmitting the channel reserve signal in the selected set of resources to reserve a portion of spectrum for communication.
[0012] Certain aspects of the present disclosure provide a device for wireless communication. The device generally includes at least one processor and a memory attached to at least one processor. The at least one
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The processor is generally configured to determine one or more orthogonal frequency division (OFDM) multiplexing symbols to transmit channel reserve signals. The at least one processor is also configured to determine a plurality of resources available for transmitting the channel reserve signals during the one or more OFDM symbols. At least one processor is additionally configured to select a set of resources within the plurality of resources for transmitting a channel reserve signal. At least one processor is further configured to transmit the channel reserve signal in the selected set of resources to reserve a portion of spectrum for communication.
[0013] Certain aspects of the present disclosure provide a computer-readable medium that has computer executable code stored therein. Computer executable code generally includes code for determining one or more orthogonal frequency division (OFDM) multiplexing symbols to transmit channel reserve signals. The computer executable code also includes code to determine a plurality of resources available for transmitting the channel reserve signals during one or more OFDM symbols. The computer executable code additionally includes code for selecting a set of resources within the plurality of resources for transmitting a channel reservation signal. The computer executable code additionally includes code for transmitting the channel reserve signal in the selected set of resources to reserve a portion of spectrum for communication.
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7/61 [0014] Certain aspects of the present disclosure provide a method that can be performed, for example, through an apparatus (for example, base station, user equipment, etc.). The method generally includes determining one or more OFDM symbols to monitor channel reserve signals. The method also includes determining a plurality of resources available for monitoring channel reserve signals during one or more OFDM symbols. The method further includes monitoring one or more channel reservation signals transmitted over a set of resources within the plurality of resources.
[0015] Certain aspects of the present disclosure provide a device for wireless communication. The apparatus generally includes a means for determining one or more OFDM symbols to monitor channel reserve signals. The apparatus also includes a means for determining a plurality of resources available for monitoring the channel reserve signals during one or more OFDM symbols. The apparatus additionally includes means for monitoring one or more channel reservation signals transmitted in a set of resources within the plurality of resources.
[0016] Certain aspects of the present disclosure provide a device for wireless communication. The device generally includes at least one processor and a memory attached to at least one processor. The at least one processor is, in general, configured to determine one or more OFDM symbols to monitor channel reserve signals. At least one processor is also configured to determine a plurality of available resources
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8/61 for monitoring the channel reserve signals during the one or more OFDM symbols. At least one processor is additionally configured to monitor one or more channel reservation signals transmitted on a set of resources within the plurality of resources.
[0017] Certain aspects of the present disclosure provide a computer-readable medium that has computer executable code stored therein. Computer executable code generally includes code to determine one or more OFDM symbols to monitor channel reserve signals. The computer executable code also includes code to determine a plurality of resources available for monitoring channel reserve signals during one or more OFDM symbols. The computer executable code additionally includes code to monitor one or more channel reservation signals transmitted in a set of resources within the plurality of resources.
[0018] For the realization of the foregoing and related purposes, the one or more aspects comprise the characteristics now fully described and particularly indicated in the claims. The following description and the accompanying drawings present in detail certain illustrative characteristics of the one or more aspects. However, these characteristics are indicative of just a few of the many ways in which the principles of different aspects can be employed, and this description is intended to include all such aspects and their equivalents.
BRIEF DESCRIPTION OF THE DRAWINGS [0019] So that the characteristics mentioned above
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9/61 of the present disclosure can be understood in detail, there may be a more particular description, briefly summarized above, by reference to the aspects, some of which are illustrated in the attached drawings. It should be noted, however, that the attached drawings illustrate only certain typical aspects of this disclosure and, therefore, should not be considered as limiting its scope, so that the description can admit other equally effective aspects.
[0020] Figure 1 is a block diagram that illustrates conceptually an example telecommunications system, according to certain aspects of the present disclosure.
[0021] Figure 2 is a block diagram that illustrates an example logical architecture of a distributed RAN, according to certain aspects of the present disclosure.
[0022] Figure 3 is a diagram that illustrates an example physical architecture of a distributed RAN, according to certain aspects of the present disclosure.
[0023] Figure 4 is a block diagram that illustrates conceptually a design of an example BS and user equipment (UE), according to certain aspects of the present disclosure.
[0024] Figure 5 is a diagram showing examples for deploying a communication protocol stack, according to certain aspects of the present disclosure.
[0025] Figure 6 illustrates an example of a DL centric subframe, according to certain aspects of
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10/61 present revelation.
[0026] Figure 7 illustrates an example of a centric UL subframe, according to certain aspects of the present disclosure.
[0027] Figure 8 illustrates an example frame structure that can be used for a channel reservation signal exchange in NR, in accordance with certain aspects of the present disclosure.
[0028] Figure 9 is a flow chart illustrating example operations that can be performed by a transmission node, in accordance with certain aspects of the present disclosure.
[0029] Figure 10 is a flow chart that illustrates example operations that can be performed by a receiving node, according to certain aspects of the present disclosure.
[0030] Figure 11 illustrates an example of a channel reservation signal exchange in NR with the use of resources in a specific UE control subband, in accordance with certain aspects of the present disclosure.
[0031] To facilitate understanding, identical reference numbers have been used, where possible, to designate identical elements that are common to the Figures. It is contemplated that the elements revealed in one aspect can be beneficially used in other aspects without specific quotation.
DETAILED DESCRIPTION [0032] Aspects of the present disclosure provide apparatus, methods, processing systems and computer-readable media for new radio (NR)
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11/61 access to new radio or 5G technology). NR can support several wireless communication services, such as millimeter wave (mmW) that targets high carrier frequency (for example, 60 GHz), multiple inputs and multiple massive outputs (MIMO), sub-6 GHz systems, etc.
[0033] In some cases, one or more nodes in such systems may participate in an exchange of channel reservation signals to reserve channel resources from the spectrum for a desired communication (for example, a transmission or receiving). Such an exchange can allow coexistence through us.
[0034] Aspects of the present disclosure provide techniques and apparatus for a channel reserve signal design based on a PDCCH NR waveform. For example, an apparatus can determine one or more orthogonal frequency division (OFDM) multiplexing symbols to transmit channel reserve signals. The apparatus can also determine a plurality of resources available for transmitting the channel reserve signals. The plurality of resources can use an NR downlink control (PDCCH) physical channel structure. The apparatus can select a set of resources within the plurality of resources to transmit a channel reserve signal, and transmit the channel reserve signal on the selected set of resources to reserve (for example, access) a portion of spectrum (for example , data channel) for communication. Communication, for example, can be for sending a transmission or receiving a transmission during the spectrum portion. The device can also monitor one or more signals
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12/61 channel reservation transmitted in a set of resources within the plurality of resources.
[0035] The following description provides examples and does not limit the scope, applicability or examples presented in the claims. Changes can be made to the function and arrangement of the elements discussed without departing from the scope of the disclosure. Various examples may omit, replace or add various procedures or components, as appropriate. For example, the methods described can be performed in a different order than described, and several steps can be added, omitted or combined. In addition, the characteristics described in relation to some examples can be combined in some other examples. For example, an apparatus can be implanted or a method can be practiced with the use of numerous aspects presented in this document. In addition, the scope of the disclosure is intended to cover such apparatus or method that is practiced with the use of another structure, functionality or structure and functionality in addition to or different from the various aspects of the present disclosure presented in this document. It should be understood that any aspect of the disclosure disclosed in this document may be incorporated by one or more elements of a claim. The word exemplifier is used in this document to mean serving as an example, case or illustration. Any aspect described in this document as an example should not necessarily be interpreted as preferential or advantageous over other aspects.
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13/61 [0036] The techniques described in this document can be used for several wireless communication networks such as LTE, CDMA, TDMA, FDMA, OFDMA, SCFDMA and other networks. The terms network and system are often used interchangeably. A CDMA network can deploy radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Broadband CDMA (WCDMA) and other CDMA variants. cdma2000 covers IS-2000, IS-95 and IS-856 standards. A TDMA network can deploy radio technology like the Global System for Mobile Communications (GSM). An OFDMA network can deploy radio technology such as NR (for example, 5G RA), UTRA Evolved (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. UTRA and E-UTRA are part of the Universal Mobile Telecommunication System (UMTS). NR is an emerging wireless communications technology under development in conjunction with the 5G Technology Forum (5GTF). The Long Term Evolution (LTE) and LTE-Advanced (LTE-A) of 3GPP are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization called the Third Generation Partnership Project (3GPP). cdma2000 and UMB are described in documents from an organization called the Third Generation Partnership Project 2 (3GPP2). The techniques described in this document can be used for the wireless networks and radio technologies mentioned above, as well as other wireless networks and radio technologies. For clarity, although aspects can be described in this document using commonly used terminology
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14/61 associated with 3G and / or 4G technologies, aspects of the present disclosure can be applied in communication systems based on another generation, such as 5G and later, including NR technologies.
[0037] New radio (NR) can refer to radios configured to operate according to a new air interface (for example, different from aerial interfaces based on orthogonal frequency division (OFDMA) multiple access) or fixed transport layer (for example, other than Internet Protocol (IP)). NR can include optimized mobile broadband (eMBB) that targets broadband width (for example, beyond 80 MHz), millimeter wave (mmW) that targets high carrier frequency (for example, 60 GHz), massive MIC (mMTC) which targets MIC techniques that are not backward compatible, sub-6 GHz and critical systems that target ultra reliable low latency communications (URLLC). For these general topics, different techniques are considered, such as conversion to code, low density parity check (LDPC) and polar. The NR cell can refer to a cell that operates according to the new air interface or fixed transport layer. An NR Node B (for example, 5G Node B) can correspond to one or multiple transmit receiving points (TRPs).
EXAMPLE WIRELESS COMMUNICATION SYSTEM [0038] Figure 1 illustrates an example wireless network 100 in which aspects of the present disclosure can be accomplished. For example, the wireless network can be a new radio (NR) or 5G network. As shown in Figure 1, wireless network 100 can include several BSs 110 and other
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15/61 network entities. BSs 110 on the network can be configured in different synchronous modes and / or associated with different operators. A BS can be a station that communicates with UEs. Each BS 110 can provide communication coverage for a particular geographic area. In 3GPP, the term cell can refer to a coverage area of a Node B and / or a subsystem of Node B that serves that coverage area, depending on the context in which the term is used. In NR systems, the term cell and gNB, Node B, 5G NB, AP, NR BS, NR BS or TRP can be interchangeable.
[0039] In some instances, a cell may not necessarily be stationary, and the cell's geographic area may move according to the location of a mobile base station. In some examples, base stations can be interconnected to each other and / or to one or more other base stations or network nodes (not shown) on wireless network 100 through various types of backhaul interfaces as a physical connection a direct network, a virtual network or the like using any suitable transport network.
[0040] In general, any number of wireless networks can be installed in a given geographic area. Each wireless network can support a particular radio access technology (RAT) and can operate on one or more frequencies. A RAT can also be mentioned as a radio technology, an aerial interface, etc. A frequency can also be mentioned as a carrier, a frequency channel, etc. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks from different RATs. In some cases, NR or 5G RAT networks can
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16/61 be installed.
[0041] A BS can provide communication coverage for a macrocell, a picocell, a femtocell and / or other types of cell. A macrocell can cover a relatively large geographical area (for example, several kilometers in radius) and can allow unrestricted access by UEs with a service subscription. A picocell can cover a relatively small geographical area and can allow unrestricted access by UEs with a service subscription. A femtocell can cover a relatively small geographic area (for example, a residence) and can allow restricted access by UEs that are associated with the femtocell (for example, UEs in a closed subscriber group (CSG), UEs for users in the residence, etc.) . A BS for a macrocell can be referred to as a BS macro. A BS for a picocell can be referred to as a BS peak. A BS for a femtocell can be referred to as a domestic BS or BS femto. In the example shown in Figure 1, BSs 110a, 110b and 110c can be macro BSs for macrocells 102a, 102b and 102c, respectively. BS HOx can be a BS peak for a 102x picocell. BSs HOy and IlOz can be femto BS for femtocells 102y and 102z, respectively. A BS can support one or multiple (for example, three) cells.
[0042] Wireless network 100 may also include relay stations. A relay station is a station that receives a transmission of data and / or other information from an upstream station (for example, a BS or UE) and sends a transmission of the data
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17/61 and / or other information for a downstream station (for example, an UE or a BS). A relay station can also be a UE that relays transmissions to other UEs. In the example shown in Figure 1, an HOr relay station can communicate with a BS 110a and UE 120r in order to facilitate communication between BS 110a and UE 120r. A relay station can also be referred to as a relay BS, a relay, etc.
[0043] Wireless network 100 can be a heterogeneous network that includes BSs of different types, for example, macro BS, BS peak, BS femto, retransmissions, etc. These different types of BSs can have different transmit power levels, different coverage areas and different impact on interference on the wireless network 100. For example, a BS macro can have a high transmit power level (for example, 20 Watts ), while peak BS, BS femto and retransmissions may have a lower transmit power level (for example, 1 Watt).
[0044] Wireless network 100 can support synchronous or asynchronous operation. For synchronous operation, BSs can have similar frame timing and transmissions from different BSs can be approximately time aligned. For asynchronous operation, BSs may have different frame timing and transmissions from different BSs may not be time-aligned. The techniques described in this document can be used for both asynchronous and synchronous operation.
[0045] A network controller 130 can couple to
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18/61 a set of BSs and provide coordination and control for those BSs. The network controller 130 can communicate with BSs 110 via a backhaul. BSs 110 can also communicate with each other, for example, directly or indirectly via wired or wireless backhaul.
[0046] UEs 120 (e.g. 120x, 120y, etc.) can be dispersed throughout the wireless network 100, and each UE can be stationary or mobile. A UE can also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, customer premises equipment (CPE), a cell phone, a smart phone, a personal digital assistant ( PDA), a wireless modem, a wireless communication device, a portable device, a laptop computer, a cordless phone, a local wireless circuit station (WLL), a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or medical equipment, a biometric device / sensor, a device usable close to the body like a smart watch, smart clothes, smart glasses, a smart bracelet, smart jewelry (for example, a smart ring, a smart bracelet, etc.), an entertainment device (for example, a music device, a video device, a satellite radio, etc. ), a sensor or vehicle component, a smart meter / sensor, industrially manufactured equipment, a global positioning system device or any other suitable device that is configured to communicate over a wireless or wired media. Some
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19/61
UEs can be considered machine-type or evolved communication devices (MTC) or evolved MTC devices (eMTC). MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which can communicate with a BS, another device (for example, remote device) or some other entity. A wireless node can provide, for example, connectivity to or to a network (for example, a wide area network such as the Internet or a cellular network) over a wireless or wired communication link. Some UEs can be considered Internet of Things (loT) devices.
[0047] In Figure 1, a continuous line with double arrows indicates desired transmissions between a UE and a service BS, which is a BS designated to serve the UE on the downlink and / or uplink. A finely dashed line with double arrows indicates interference transmissions between a UE and a BS.
[0048] Certain wireless networks (for example, LTE) use orthogonal frequency division multiplexing (OFDM) on the downlink and single carrier frequency division multiplexing (SC-FDM) on the uplink. OFDM and SC-FDM divide the system bandwidth into multiple orthogonal subcarriers (K) which are also commonly referred to as tones, compartments, etc. Each subcarrier can be modulated with data. In general, the modulation symbols are sent in the frequency domain with OFDM and in the time domain with SC-FDM. The spacing between adjacent subcarriers can be fixed and the total number of subcarriers (K) can be dependent on the
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20/61 system bandwidth. For example, the spacing of the subcarriers can be 15 kHz and the minimum resource allocation (called a resource block) can be 12 subcarriers (or 180 kHz). Consequently, the nominal FFT size can equal 128, 256, 512, 1024 or 2048 for system bandwidth of 1.25, 2.5, 5, 10 or 20 mega-hertz (MHz), respectively. The system bandwidth can also be divided into sub-bands. For example, a subband can cover 1.08 MHz (that is, 6 resource blocks), and there can be 1, 2, 4, 8, or 16 subbands for the 1.25, 2, 5, 5, 10 or 20 MHz, respectively.
[0049] While the aspects of the examples described in this document may be associated with LTE technologies, aspects of the present disclosure may be applicable to other wireless communications systems, such as NR.
[0050] The NR can use OFDM with a CP on the uplink and downlink and include support for half duplex operation with the use of TDD. A single 100 MHz carrier-component bandwidth can be supported. NR resource blocks can span 12 subcarriers with a 75 kHz subcarrier bandwidth over a duration of 0.1 ms. Each radio frame can consist of 50 subframes with a duration of 10 ms. Consequently, each subframe can have a duration of 0.2 ms. Each subframe can indicate a link direction (ie DL or UL) for data transmission and the link direction for each subframe can be switched dynamically. Each subframe can include DL / UL data, as well as
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21/61 as DL / UL control data. The subframes of UL and DL to NR can be as described in more detail below in relation to Figures 6 and 7. The beam formation can be supported and the beam direction can be dynamically configured. MIMO transmissions with pre-coding can also be supported. The MIMO configurations in the DL can support up to 8 transmission antennas with multi-layered DL transmissions up to 8 streams and up to 2 streams per UE. Multilayer transmissions with up to 2 streams per EU can be supported. Multiple cell aggregation can be supported with up to 8 server cells. Alternatively, the NR can support a different air interface, in addition to one based on OFDM. NR networks can include entities such as central units (CUs) and / or distributed units (DUs).
[0051] In some examples, access to the air interface can be programmed, in which a programming entity (for example, a base station) allocates resources for communication between some or all devices and equipment within its cell or area of service. Within the present disclosure, as further discussed below, the programming entity may be responsible for programming, assigning, reconfiguring and releasing resources to one or more subordinate entities. That is, for scheduled communication, subordinate entities use resources allocated by the programming entity. Base stations are not the only entities that can function as a programming entity. That is, in some examples, a UE can function as a programming entity, which programs
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22/61 resources for one or more subordinate entities (for example, one or more other UEs). In this example, the UE is functioning as a programming entity, and other UEs use resources programmed by the UE for wireless communication. A UE can function as a programming entity in a point-to-point network (P2P) and / or in a mesh network. In an example of a mesh network, UEs can optionally communicate directly with each other in addition to communicating with the programming entity.
[0052] Thus, in a wireless communication network with programmed access to time-frequency resources and which has a cellular configuration, a P2P configuration and a mesh configuration, a programming entity and one or more subordinate entities communicate with the use of the programmed resources.
[0053] As noted above, a RAN can include a CU and DUs. An NR BS (for example, gNB, 5G NB, NB, TRP, AP) can correspond to one or multiple BSs. NR cells can be configured as access cells (ACells) or data-only cells (DCells). For example, the RAN (for example, a central unit or distributed unit) can configure the cells. DCells can be cells used for carrier aggregation or dual connectivity, but not used for initial access, cell selection / reselection or automatic switching. In some cases, DCells may not transmit synchronization signals - in some cases, DCells may transmit SS. NR BSs can transmit downlink signals to UEs that indicate the cell type. Based on
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23/61 cell type indication, the UE can communicate with the
NR BS. For example, the UE can determine NR BSs at
consider for cell selection, access, change automatic and / or measurement based on kind of cell indicated.
[0054] Figure 2 illustrates an example logical architecture of a distributed radio access network (RAN) 200, which can be deployed in the wireless communication system illustrated in Figure 1. A 5G 206 access node can include a controller access node (ANC) 202. The ANC can be a central unit (CU) of the distributed RAN 200. The backhaul interface to the next generation main network (NG-CN) 204 can end at the ANC. The backhaul interface for neighboring next generation access nodes (NG-ANs) can end at ANC. The ANC may include one or more 208 TRPs (which may also be referred to as BSs, NR BSs, Node Bs, 5G NBs, APs, or some other term). As described above, a TRP can be used interchangeably with a cell.
[0055] TRPs 208 can be a DU. TRPs can be connected to an ANC (ANC 202) or more than one ANC (not shown). For example, for RAN sharing, radio as a service (RaaS) and service-specific AND facilities, the TRP can be connected to more than one ANC. A TRP can include one or more antenna ports. TRPs can be configured to serve individually (for example, dynamic selection) or joint (for example, transmission in junction) traffic to a UE.
[0056] Local architecture 200 can be used to illustrate the definition of fronthaul. Architecture can
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24/61 be defined as supporting fronthaul solutions through different types of deployment. For example, the architecture may be based on transmission network capabilities (for example, bandwidth, latency and / or jitter).
[0057] The architecture can share characteristics and / or components with LTE. According to aspects, the next generation AN (NG-AN) 210 can support dual connectivity with NR. NG-AN can share a common fronthaul for LTE and NR.
[0058] The architecture can enable cooperation between TRPs 208. For example, cooperation can be predefined within a TRP and / or through TRPs through ANC 202. According to aspects, no interface between TRP may be necessary / be gift.
[0059] According to aspects, a dynamic configuration of divided logic functions may be present within the 200 architecture. As will be described in greater detail with reference to Figure 5, the Radio Resource Control (RRC) layer, Protocol layer Packet Data Convergence (PDCP), Radio Link Control (RLC) layer, Media Access Control layer (MAC) and a Physical layer (PHY) can be placed adaptively on the DU or CU (for TRP or ANC, respectively). According to certain aspects, a BS can include a central unit (CU) (for example, ANC 202) and / or one or more distributed units (for example, one or more TRPs 208).
[0060] Figure 3 illustrates an example physical architecture of a distributed RAN 300, according to
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25/61 aspects of the present disclosure. A centralized main network unit (C-CU) 302 can host main network functions. The C-CU can be installed centrally. C-CU functionality can be downloaded (for example, for advanced wireless services (AWS)) in an effort to handle peak capacity.
[0061] A centralized RAN unit (C-RU) 304 can host one or more ANC functions. Optionally, the C-RU can host core network functions locally. The C-RU may have a distributed deployment. The C-RU can be closer to the network edge. [0062] A DU 306 can host one or more TRPs (edge node (EN), edge unit (EU), radio head (RH), smart radio head (SRH) or similar). DU can be located at the edges of the network with radio frequency (RF) functionality.
[0063] Figure 4 illustrates example components of BS 110 and UE 120 illustrated in Figure 1, which can be used to implement aspects of the present disclosure. One or more components of BS 110 and UE 120 can be used to practice aspects of the present disclosure. For example, antennas 452, processors 466, 458, 464 and / or controller / processor 480 of UE 120 and / or antennas 434, processors 430, 420, 438 and / or controller / processor 440 of BS 110 can be used to perform the operations described in this document and illustrated with reference to Figures 9 and 10.
[0064] Figure 4 shows a block diagram of a BS 110 and UE 120 project, which can be one of the BSs and one of the UEs in Figure 1. For a restricted association scenario, the base station 110 can be
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26/61 the BS 110c macro in Figure 1, and the UE 120 can be the UE 120y. Base station 110 can also be a base station of some other type. Base station 110 can be equipped with antennas 434a to 434t, and UE 120 can be equipped with antennas 452a to 452r.
[0065] At base station 110, a transmission processor 420 can receive data from a data source 412 and control information from a controller / processor 440. The control information can be for the Physical Broadcast Channel (PBCH), Physical Control Format Indicator Channel (PCFICH), Hybrid HARQ Physical Indicator Channel (PHICH), Physical Downlink Control Channel (PDCCH), etc. Data can be for the Downlink Shared Physical Channel (PDSCH), etc. Processor 420 can process (e.g., encode and map symbols) the data and control information to obtain data symbols and control symbols, respectively. Processor 420 can also generate reference symbols, for example, for PSS, SSS and cell-specific reference signal. A multiple input and multiple output (MIMO) transmission processor (TX) 430 can perform spatial processing (eg, pre-coding) on data symbols, control symbols and / or reference symbols, if applicable. applicable, and can provide output symbol streams for 432a to 432t modulators (MODs). Each 432 modulator can process a respective output symbol stream (for example, for OFDM, etc.) to obtain an output sample stream. Each 432 modulator can further process (for example, convert to analog,
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27/61 amplify, filter and convert upwards) the flow
sample in output for get a signal link downward. The signals downlink from modulators 432a to 432t can be transmitted through the
antennas 434a to 434t, respectively.
[0066] At UE 120, antennas 452a to 452r can receive downlink signals from base station 110 and can provide received signals to demodulators (DEMODs) 454a to 454r, respectively. Each demodulator 454 can condition (for example, filter, amplify, downwardly convert and digitize) a respective received signal to obtain input samples. Each demodulator 454 can further process the input samples (for example, for OFDM, etc.) to obtain received symbols. A MIMO 456 detector can obtain symbols received from all demodulators 454a through 454r, perform MIMO detection on received symbols, if applicable, and provide detected symbols. A receiving processor 458 can process (e.g., demodulate, deinterleave and decode) the detected symbols, provide decoded data to the UE 120 to a collector
data 460 and provide information in control decoded to a controller / processor 480.[0067] No uplink, in the HUH 120, one
464 transmission processor can receive and process data (for example, for the Physical Uplink Shared Channel (PUSCH)) from a 462 data source and control information (for example, for the Physical Uplink Control Channel (PUCCH)) from the 480 controller / processor.
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28/61 transmission 464 can also generate reference symbols for a reference signal. The symbols from the 464 transmission processor can be pre-encoded by a TX MIMO 466 processor, if applicable, further processed by demodulators 454a to 454r (eg for SC-FDM, etc.) and transmitted to the base 110. In BS 110, uplink signals from UE 120 can be received by antennas 434, processed by modulators 432, detected by a MIMO detector 436, if applicable, and further processed by a receiving processor 438 to obtain control information and decoded data sent by UE 120. Receiving processor 438 can provide decoded data to a data collector 439 and decoded control information to controller / processor 440.
[0068] The controllers / processors 440 and 480 can direct the operation on base station 110 and UE 120, respectively. The controller / processor 440 and / or other processors and modules in the base station 110 can perform or direct, for example, the execution of several processes for the techniques described in this document, such as operations 900 in Figure 9, operations 1000 in Figure 10, etc. Controller / processor 480 and / or other processors and modules in UE 120 can also perform or direct, for example, the execution of processes for the techniques described in this document, such as operations 900 in Figure 9, operations 1000 in Figure 10 , etc. Memories 442 and 482 can store data and program codes for BS 110 and UE 120, respectively. a
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Programmer 444 can program UEs for data transmission on the downlink and / or uplink.
[0069] Figure 5 illustrates a diagram 500 showing examples for deploying a communications protocol stack, according to aspects of the present disclosure. The illustrated communications protocol stacks can be deployed by devices that operate on a 5G system (for example, a system that supports uplink based mobility). Diagram 500 illustrates a communications protocol stack that includes a Radio Resource Control (RRC) layer 510, a Packet Data Convergence Protocol (PDCP) layer 515, a Radio Link Control (RLC) layer ) 520, a Media Access Control (MAC) layer 525 and a Physical (PHY) layer 530. In several examples, layers of a protocol stack can be deployed as separate software modules, portions of a processor or ASIC , portions of non-colocalized devices connected by a communications link or various combinations thereof. Co-located and non-co-located deployments can be used, for example, in a protocol stack for a network access device (for example, ANs, CUs and / or DUs) or a UE.
[0070] A first option 505-a shows a split deployment of a protocol stack, where the deployment of the protocol stack is split between a centralized network access device (for example, an ANC 202 in Figure 2) and device distributed network access (for example, DU 208 in Figure 2). In the first option 505-a, a layer of RRC 510 and a layer of PDCP 515
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30/61 can be implanted by the central unit, and a layer of RLC 520, a layer of MAC 525 and a layer PHY 530 can be implanted by DU. In several examples, CU and DU can be colocalized or non-colocalized. The first option 505-a can be useful in a macrocell, microcell or picocell installation.
[0071] A second option 505-b shows a unified deployment of a protocol stack, in which the protocol stack is deployed on a single network access device (for example, access node (AN), new radio base station (NR BS), a new radio Node B (NR NB), a network node (NN) or similar). In the second option, the RRC layer 510, the PDCP layer 515, the layer of RLC 520, the layer of MAC 525 and the layer PHY 530 can each be implanted by the AN. The second option 505-b can be useful in a femtocell implantation.
[0072] Regardless of whether a network access device deploys part or all of a protocol stack, a UE can deploy an entire protocol stack (for example, the RRC 510 layer, the PDCP 515 layer, the RLC 520, the MAC layer 525 and the PHY layer 530).
[0073] Figure 6 is a diagram 600 showing an example of a centric subframe of DL. The centric DL subframe may include a control portion 602. The control portion 602 may exist in the beginning or beginning portion of the DL centric subframe. The control portion 602 can include various programming information and / or control information that correspond to various portions of the DL centric subframe. In some configurations, the
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31/61 control portion 602 can be a physical DL control channel (PDCCH), as shown in Figure 6. The centric DL subframe can also include a DL 604 data portion. The DL 604 data portion can sometimes be referred to as the payload of the DL centric subframe. The DL 604 data portion may include the communication resources used to communicate DL data from the programming entity (for example, UE or BS) to the subordinate entity (for example, UE). In some configurations, the DL 604 data portion may be a DL shared physical channel (PDSCH).
[0074] The DL centric subframe can also include a portion of common UL 60 6. The portion of common UL 606 can sometimes be referred to as a continuous UL burst, a continuous burst of common UL and / or several other suitable terms . The common UL portion 606 may include feedback information that corresponds to several other portions of the DL centric subframe. For example, the common UL portion 606 may include feedback information that corresponds to control portion 602. Non-limiting examples of feedback information may include an ACK signal, a NACK signal, an HARQ indicator and / or several other suitable types of information. The common UL portion 606 may include additional or alternative information, such as information pertaining to random access channel (RACH) procedures, programming requests (SRs) and various other types of suitable information. As shown in Figure 6, the end of the DL 604 data portion can be separated in time from the beginning of the
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32/61 portion of common UL 606. This time separation can sometimes be referred to as an interval, a protection period, a protection interval and / or several other suitable terms. This separation provides time for switching from DL communication (for example, receiving operation through the subordinate entity (for example, UE)) to UL communication (for example, transmission by the subordinate entity (for example, UE)) . One skilled in the art will understand that the aforementioned is merely an example of a centric DL subframe and alternative structures that have similar characteristics can exist without necessarily deviating from the aspects described in this document.
[0075] Figure 7 is a diagram 700 showing an example of a centric UL subframe. The UL centric subframe may include a control portion 702. The control portion 702 may exist in the beginning or beginning portion of the UL centric subframe. The control portion 702 in Figure 7 can be similar to the control portion described above with reference to Figure 6. The centric UL subframe can also include a UL 704 data portion. The UL 704 data portion can sometimes be mentioned as the payload of the UL centric subframe. The UL portion can refer to the communication resources used to communicate UL data from the subordinate entity (for example, UE) to the programming entity (for example, UE or BS). In some configurations, control portion 702 may be a physical DL control channel (PDCCH).
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33/61 [0076] As shown in Figure 7, the end of the control portion 702 can be separated in time from the beginning of the UL 704 data portion. This time separation can sometimes be referred to as an interval, period protection, protection interval and / or several other suitable terms. This separation provides time for switching from DL communication (for example, receiving operation via the programming entity) to UL communication (for example, transmission by the programming entity). The centric UL subframe can also include a portion of common UL 706. The portion of common UL 706 in Figure 7 may be similar to the portion of common UL 606 described above with reference to Figure 6. The portion of common UL 706 may, in addition or alternatively, include information pertaining to the channel quality indicator (CQI), survey reference signals (SRSs) and several other suitable types of information. One skilled in the art will understand that the aforementioned is merely an example of a centric UL subframe and alternative structures that have similar characteristics can exist without necessarily deviating from the aspects described in this document. In one example, a frame may include both UL subcentric and DL centric subframes. In this example, the ratio between centric UL subframes and DL centric subframes in a frame can be dynamically adjusted based on the amount of UL data and the amount of DL data that is transmitted. For example, if there is more UL data, then the ratio between UL centric subframes and
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DL can be increased. Conversely, if there is more DL data, then the ratio between centric subframes of UL and centric subframes of DL can be reduced.
Example shared spectrum deployments [0077] Example deployment scenarios for a shared spectrum, which may include the use of an unlicensed radio frequency spectrum, may include operator-based deployments, a stand-alone mode of operation and / or a dual connectivity operation mode. In an operator-based deployment, multiple operators can share the same frequency range. An autonomous mode of operation may include automatic switching between the public land mobile network (PLMN) from a licensed carrier. A dual connectivity mode can include connectivity to a shared spectrum component carrier and a licensed spectrum anchor carrier.
Access on unlicensed spectrum [0078] Average access on an unlicensed spectrum may involve a listen before speaking (LBT) dynamic procedure. Dynamic LBT procedures can allow sharing of network resources (for example, frequency resources) on a millisecond time scale. However, access to the media may not be guaranteed, for example, in an asynchronous system. For asynchronous operation, B-nodes (BSs) may have different frame timings, and transmissions from different B-nodes may not be time-aligned (for example, one or more different B-frame and / or frame boundaries) may not be aligned simultaneously).
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35/61 [0079] A Wi-Fi asynchronous system design can be optimized for dynamic LBT procedures. In a Wi-Fi system, warning transmissions (overload signals, reference signals) can be subjected to LBT. The periodic warning signs may be of an asynchronous nature. Warning transmissions may not be transmitted frequently and receiving stations (STAs) can trigger asynchronous transmission of warnings on a Wi-Fi system.
[0080] STA-based mobility may be necessary in an effort to compensate for poor radio resource management (RRM) due, for example, to the asynchronous nature of warning transmissions. The data transmissions can each contain a preamble that can be used for synchronization and detection of data intermittency. Licensed spectrum access [0081] In 4G / LTE, access to the media can be optimized for the licensed spectrum. Consequently, detection (for example, monitoring or listening) to determine whether another network node is occupying the same RF band before communicating (speaking) in the RF band, in an effort to avoid interference, may not be necessary. 4G / LTE systems use periodic transmission of overload signals instead. RRM procedures explore the periodic transmission of these overload signals. The measurement report can be used for network-controlled mobility that can take radio conditions and system loading into account.
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36/61 [0082] The battery life of UEs can be extended with the use of a batch receiving procedure (XRD), so that a UE receives batch information. During a period of XRD, an UE can power most of its circuitry, thereby saving power.
[0083] NR can be optimized for licensed spectrum. Although 4G / LTE may not support a quick on / off procedure, in which a transmitter BS can communicate with a wireless device, stop quickly using portions of the spectrum, and quickly reestablish communication, system designs NR can support this characteristic.
Access to shared spectrum media [0084] A shared spectrum may attempt to minimize changes from the operation of the licensed spectrum of NR spectrum in an effort to accelerate the deployment of shared spectrum. The shared spectrum can accommodate periodic transmissions of overload channels and / or common channels. The shared spectrum may not make many changes to RRM and can explore a quick on / off procedure. According to an example, a BS can communicate with a wireless device using a portion of the shared spectrum and can stop using the shared spectrum, for example, to defer to a licensed transmitter. BS may restart with the use of the spectrum when the licensed transmitter stops using spectrum resources.
[0085] Operation on a shared spectrum
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37/61 can include a network listen function on a Node B (BS). Deployments can protect the overload and / or common channels from other deployments. Otherwise, a node associated with a first spectrum and first operator can protect overload and / or common channels transmitted by a node associated with a second spectrum and a second operator.
[0086] In a shared spectrum, the configuration used by other wireless devices can be learned by detecting and measuring discovery reference signals from a neighboring Node B (DRS) and / or diffusion channel (BCH). A DRS can include, for example, PSS, SSS, CRS, and / or CSI-RS. The shared spectrum may not use an LBT procedure for signals of overload and / or common channels.
[0087] An UE, which operates on a shared spectrum, can perform an LBT procedure in an effort to access unprotected resources.
[0088] A spectrum access system (SAS) can allocate channels within and across strata. These strata may include, in order of priority, operators of (1) incumbent licenses; (2) priority access licenses (PALs); and (3) general authorized access (GAA). A shared spectrum can complement the SAS server functionality with overhead mechanisms for channel selection.
EXAMPLE CHANNEL RESERVE SIGN WITH WAVE SHAPE
PDCCH DE NR [0089] Channel reserve (CR) signals, in general, can be used to reserve portions of spectrum
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38/61 for communication. For example, certain wireless local area networks (for example, WiFi) use request to send (RTS) and ready to send (CTS) signals for reservation
of channel. Certain systems, such as NR, can also support a switch reserve sign in channel between us for will allow coexistence through From we. For example, in
use of unlicensed and / or shared NR spectrum, channel reservation signals can be used to reduce collisions by transmissions through different nodes that access the unlicensed / shared spectrum. In some respects, the channel reservation signal exchange between NR nodes may include an exchange of pre-grant messages (PG), channel reservation signals for transmission (CR-T) and channel reservation signals for reception (CR-R).
[0090] The PG message can be transmitted by a BS and can include information that indicates which nodes are programmed for communication and include a lease (UL or DL) for communication. CR-T signals can announce the intention to transmit and include transmission power information (for example, power control) for the next data transmission. A node that receives a CR-T signal can determine (or estimate), based on the transmission power information in the CR-T signal, an interference level that it will receive from the transmission node when the node transmit sends the data transmission. CR-R signals can announce the intention to receive a data transmission, and include information indicating at least one of the acceptable interference level (for the node transmitting the CR-R signal) or transmission power information signal
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CR-R. A node that receives a CR-R signal can determine, based on the CR-R signal, a level of interference that it will generate upon transmission, and determine whether the level of interference is acceptable to the node that transmits the CR-R signal.
[0091] Figure 8 illustrates an example frame structure 800 that can be used for a channel reservation signal exchange in NR, in accordance with certain aspects of the present disclosure. As shown, frame structure 800 may include PG message blinking in 802, CR-T signal blinking in 804, CR-R signal blinking in 806 and data transmission in 808.
[0092] One or more nodes (for example, BSs) can transmit PG messages over 802 in order to program one or more other nodes (for example, UEs) for communication over a portion of spectrum (for example, data channel) at 808. As described in greater detail below, PG messages can be transmitted in parallel by one or more BSs (that is, each PG message can be orthogonal in frequency in relation to other PG messages). The transmission of PG messages can be followed by parallel transmission (for example, by BSs and / or UEs) of CR-T signals (in 804), followed by parallel transmission (for example, by BSs and / or UEs) of CR-R signals (in 806). In some cases, nodes can be configured to
monitor signals CR-R / CR-T When the we no are scheduled for streaming. Or be, the we what are scheduled for transmission of signals in CR-R in 806
can monitor CR-T signals in 804. Similarly,
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40/61 nodes that are programmed to transmit CRT signals at 804 can monitor CR-R signals at 806.
[0093] In general, approaches in some systems, for example, like WiFi, for the transmission of channel reservation signals may not be suitable in other systems, such as NR. For example, in WiFi, channel reservation signals (for example, RTS / CTS) are, in general, transmitted in small packets, each about the size of a preamble. The transmission of such frames, however, in systems like NR with large numbers of nodes can cause a significant amount of collisions, which, in turn, degrade the detection of channel reserve signals at receivers. Consequently, a new design waveform for NR channel reserve signals is desired.
[0094] Aspects of the present disclosure provide techniques and apparatus for a channel reservation signal design based on NR PDCCH.
[0095] Figure 9 is a flow chart illustrating example 900 operations that can be performed, for example, by a channel reserve transmission node (CR) (for example, BS 110, UE 120, etc.), from according to certain aspects of the present disclosure. Operations 900 can begin at 902, wherein the CR transmitting node determines one or more OFDM symbols to transmit channel reserve signals.
[0096] In 904, the CR transmission node determines a plurality of resources available for the transmission of the channel reserve signals during the one or more OFDM symbols. The plurality of resources can use the same structure as an NR PDCCH. In 906, the
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41/61 CR transmission selects a set of resources within the plurality of resources to transmit a channel reserve signal. In 908, the CR transmission node transmits the channel reserve signal (for example, CR-T or CR-R) in the selected set of resources to reserve a portion of spectrum for communications. The spectrum portion, for example, can correspond to a channel (for example, data channel) that is used for communications. Such communications may include sending a broadcast or receiving a broadcast. In one aspect, the CR transmitting node can send a CR signal (for example, CR-T or CRR) at a time. That is, the CR transmission node can
transmit a signal in CR-T followed by a signal of CR-R, or vice versa.[0097] A Figure 10 is a flow chart that illustrates operations example 1000 that can be carried out, per example, for a knot in receipt of CR (for example, BS 110, EU 120, etc. ), according certain aspects gives present revelation. 1000 operations can begin in
1002, wherein the CR receiving node determines one or more OFDM symbols to monitor channel reserve signals (for example, CR-T, CR-R, etc.). In 1004, the CR receiving node determines a plurality of resources available for monitoring channel reservation signals during one or more OFDM symbols. In one aspect, the plurality of resources available for monitoring channel reserve signals uses a downlink control channel structure (for example, NRPDCCH). In 1006, the CR receiving node monitors one or more channel reserve signals transmitted in a set
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42/61 of resources within the plurality of resources.
[0098] In certain respects, the plurality of resources used for channel reservation signal transmission may use a downlink control channel structure (e.g. PDCCH) and include one or more control channel elements ( CCEs). For example, in one aspect, the plurality of resources may include the specific EU control subband in NR. A basic resource unit for a specific EU PDCCH structure in NR is, in general, the physical resource block (PRB). For example, each NR PDCCH can occupy one or more NR-CCEs, and each R-CCE can include one or more PRBs. The set of PRBs used for an NR PDCCH can be distributed over the control sub-band. A demodulation reference signal can be incorporated into each PRB, and use the same beamform as the control data in the PRB. The demodulation reference signal can be used by the UE for demodulation of the NR-PDCCH.
[0099] In general, for NR-PDCCH, different numbers of NR-CCEs can form the resource for downlink control (DCI) information. The number of NR-CCEs in an NR-PDCCH refers, in general, to the aggregation level of the NR-PDCCH. The level of aggregation generally sets the coverage of the DCI and the amount of resources used for the DCI. Additionally, similar to legacy LTE, for NR PDCCH, one or more research spaces can be defined, in which each research space includes a set of decoding candidates with one or more levels of aggregation.
[0100] According to certain aspects, the sub-band
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43/61 UE-specific control in NR can be reused for channel reserve signal transmissions. That is, the transmission of channel reservation signals in NR can apply concepts of PRE (with DRMS) / NR-CCE / decoding candidate similar to those used for transmission of PDCCH based on EU-specific DMRS in NR. In one aspect, channel reservation signal transmissions may use the same rate coding and / or matching mechanism as NR-PDCCH. In comparison to NR-PDCCH, however, the payload size of channel reserve signal transmissions may be smaller (for example, less information can be included in channel reserve signals compared to typical PDCCH DCIs). This can result in a lower aggregation level for the transmission of CR to the same coverage as NR-PDCCH.
[0101] In one aspect, the channel reserve signal (for example, CR-T and / or CR-R) can occupy a set of resources used for one of the NR-PDCCHs. That is, one of the NR-PDCCHs can be replaced by a channel reservation signal. For channel reservation signals, a search space that includes a set of decoding candidates can be defined. The channel reservation search space can be a common search space that is known to all nodes (for example, BSs, UEs) in the communication system. For example, in one aspect, the search space can be configured in a semi-static way through diffusion signaling. The aggregation level used for each decoding candidate can be controlled based on the desired control capacity and coverage of the channel reservation signal.
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44/61 [0102] According to certain aspects, the CR transmission node can determine a plurality of decoding candidates for sending the channel reservation signals, where each decoding candidate includes one or more CCEs. The CR transmitting node can select one of the decoding candidates to use for sending the channel reservation signal. In some cases, the selected decoding candidate may be different from a decoding candidate used for transmitting the channel reserve signal from another CR transmission node. In some cases, the CR transmission node may select the decoding candidate by randomly selecting a decoding candidate from the plurality of decoding candidates. The selected set of resources within the plurality of resources can include the CCEs of the selected decoding candidate. Each CCE can include one or more PRBs and each PRB can include a DMRS. Once selected, the CR transmission node can generate a channel reservation packet, encode the packet with CRC insertion and fill the CR signal in the decoding candidate. The CR transmission node can also multiplex DMRS in each decoding candidate's PRB, and transmit the beam. As noted, the channel reserve signal can be a CR-T that indicates that the communication (for example, over a portion of the spectrum) is for sending a transmission or a CR-R that indicates that the communication (for example , over a portion of the spectrum) is for receiving a transmission.
[0103] In one aspect, when the CR receiving node monitors channel reserve signals, it can
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45/61 perform a blind decoding of all decoding candidates in the channel reservation signal search space. For example, the CR receiving node may determine (for example, based on a received configuration and / or upper layer signaling) a plurality of decoding candidates in the set of resources available for sending channel reservation signals, wherein each channel reservation signal uses one of the plurality of decoding candidates. The CR receiving node can perform a blind decoding procedure through the plurality of decoding candidates for the one or more channel reservation signals. As noted, each decoding candidate can include one or more CCEs, each CCE can include one or more PRBs, and each PRB can include a DMRS.
[0104] The CR receiving node can process one of the decoding candidates used for one of the channel reservation signals based on DMRSs. For example, the CR receiving node can use DMRS within each PRB for channel estimation, and perform a likelihood ratio (LLR) logarithm computation for each PRB using the estimated channel. The receiving node can sew the LLRs for each decoding candidate and perform the decoding. If the CRC passes, the receiving node can register the content.
[0105] Figure 11 illustrates an example of an exchange of channel reserve signal 1100 in NR using resources in an EU-specific control subband, in accordance with certain aspects of the present disclosure. In this example, four links (for example, θΝΒ _ξ a υΕ _Ξ for i =
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Ο, 1, 2, 3) between ο eNB and ο UE are defined. The channel backup signal exchange 1100 includes a flash of PG in 1102, a flash of CR-R in 1104, a flash of CR-T in 1106 and a flash of CR-R in 1108. Note, however, that the change represented 1100 is merely a reference example of a channel reference signal exchange that can be used. Those of ordinary skill in the art will recognize that other channel reference signal switch configurations can be used.
[0106] In some respects, CR transmission nodes may transmit a grant message (for example, as a PG) to one or more devices (for example, UEs, eNBs, etc.) before transmitting the reserve signal of channel. The lease message may include a lease for at least one of the uplink or downlink communications, and may indicate at least one of the times for each of the devices to transmit a channel reservation signal or a time for each of the devices to monitor a channel reservation signal. Similarly, each device can monitor a grant message on resources (for example, UE-specific control subband resources), and determine, based on a schedule in the grant message, a time for monitoring a grant. or more channel reservation signals.
[0107] As shown in Figure 11, for example, at the PG stage in 1102, each θΝΒ _ξ sends a PG to a UEi. Note that each θΝΒ _ξ is a different transmission node. PG can schedule (for example, include a lease) ο υΕ _Ξ for communication (for example, during a
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47/61 data channel) and can indicate whether the communication is a downlink transmission (for example, from eNBi) or an uplink communication (for example, from υΕ _Ξ ). For example, PG for UE ₀ is for uplink communication for eNB ₀ , PG for UE ₂ is for downlink communication from eNB ₂ , PG for UE ₂ is for uplink communication for eNB ₂ and PG for UE ₃ is for downlink communication from eNB ₃ .
[0108] From the perspective of each EU, PGs can be in a PG research space. In some cases, if the PG burst is shared with a normal grant burst, the PG search space can be a subset of (or equal to) a common or specific UE-specific search space that the UE is monitoring ( for example, to save attempts at decoding by the UE).
[0109] For CR-R / CR-T intermittency, a CR search space can be defined which is common for all nodes. Each CR transmission node can use a decoding candidate in the research space for the transmission of CR-T and / or CR-R. In some cases, each CR transmission node may select separate decoding candidates for CR-T and / or CRR transmission. When CR-R flashes in 1104, eNB ₀ sends a CR-R to prepare for receiving data from UE ₀ , UE ₂ sends a CR-R to prepare for receiving data from eNB ₂ , eNB ₂ sends a CR-R to prepare for receiving data from UE ₂ , and UE ₃ sends a CR-R to prepare for receiving data from UE ₃ .
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48/61 [0110] In one aspect, one or more transmitters of a channel reserve signal can select the same set of OFDM symbols to align the CR transmission. That is, a first CR transmission node can select the same set of OFDM symbols chosen by at least one second CR transmission node for a channel reserve signal transmission, in order to align the reserve signal transmissions. channel (for example, by the first and at least the second CR transmission node). For example, as shown in Figure 11, each CR-R transmission in 1104 can use the same set of OFDM symbols, each CR-T transmission in 1106 can use the same set of OFDM symbols, and so on. In one aspect, each decoding candidate used by a particular node for a CR-R / CRT transmission may not overlap (for example, in frequency) another decoding candidate used by another node for a CR-R / CR transmission. CR-T. For example, as shown in Figure 11, the decoding candidates are not overlapping (for example, they are orthogonal). In some respects, however, the techniques presented in this document may allow one or more decoding candidates to overlap. In such cases, diversity and / or beam formation techniques can be used to reduce collisions between nodes that transmit CR signals.
[0111] As mentioned above, one or more nodes can monitor CR-R / CR-T signals when the nodes are transmitting. With reference to the example in Figure 11, UE ₀ , eNB ₂ , UE ₂ and eNB ₃ can monitor the CR-R signals transmitted from eNB ₀ , UE ₂ , eNB ₂ and UE ₃ ,
Petition 870190051664, of 6/3/2019, p. 53/88
49/61 respectively, in 1104. In one aspect, one or more CR receiving nodes can select the same set of ODFM symbols (for example, that one or more other CR receiving nodes) to monitor reserve signals for channel (for example, to align monitoring between CR receiving nodes). Once received, each node can determine based on the information (for example, CR-R transmission power information and / or acceptable interference level from the node transmitting the CR-R) incorporated into the CR-R whether it accepts its respective PG and proceeds with transmission over the spectrum portion (eg, data channel). For example, each CR receiving node can determine, based on the transmission power information, a measurement of path loss between itself and the CR transmitting node. Based on the path loss measurement, the CR receiving node can determine the level of interference that will be received by the CR transmitting node due to a data transmission from the CR receiving node. If the level of interference determined exceeds the acceptable level of interference from the CR transmitting node, the CR receiving node may decide to abandon its PG.
[0112] As shown in Figure 11, for example, in 1104, UE ₀ (for example, CR receiving node) receives a CR-R from eNB ₀ (for example, CR transmitting node) for a transmission uplink link pending for eNB ₀ . Similarly, in 1104, eNB ₃ (eg, CR receiving node) receives a CR-R from UE ₃ (eg, CR transmitting node) for a downlink transmission pending from eNB ₃ . However,
Petition 870190051664, of 6/3/2019, p. 54/88
50/61 in 1106, UE ₀ refrains from transmitting a CR-T to eNB ₀ and eNB ₃ refrains from transmitting a CR-T to UE ₃ . In this situation, the UE ₀ may have determined that the magnitude of interference for its transmission of pending uplink data would have exceeded the acceptable interference level for eNB ₀ (for example, indicated in the CR-R received from eNB ₀ ). Similarly, eNB ₃ may have determined that the magnitude of interference for its downlink communication would have exceeded the interference level acceptable for UE ₃ (for example, indicated in the CR-R received from UE ₃ ). Thus, in 1106, CR-T intermittency can only include CR-T transmissions from eNB ₂ and UE ₂ , respectively. In 1108, another CR-R burst occurs and includes CR-R transmissions from UE ₂ and eNB ₂ .
[0113] In aspects, a difference in CR transmission from PDCCH transmission is that channel reservation transmissions can be transmitted from different nodes. As such, in some cases, decoding candidate collisions may exist when each node selects a decoding candidate and transmits a channel reservation signal using the selected decoding candidate. For example, nodes may not be able to dynamically use different decoding candidates to avoid collisions as in the case of PDCCH.
[0114] Consequently, the aspects presented in this document provide techniques to prevent (or reduce) collisions between channel reservation transmissions.
Petition 870190051664, of 6/3/2019, p. 55/88
51/61 [0115] In one aspect, the CR transmission node may use a random decoding candidate for channel reservation signal transmissions. That is, the CR transmission node can randomly select a decoding candidate from the plurality of decoding candidates in the channel reservation signal search space. The use of a random decoding candidate selection procedure may be desirable for mmW systems in NR. For example, in such systems, the collision problem may be less serious, as different transmitters are beamed differently. Thus, even if there is a collision in the use of NR-CCE, interference can be suppressed by the formation of beams.
[0116] In some ways, a CR transmission node can identify at least one other decoding candidate used by another device (for example,
one another knot in transmission of CR) for shipping in one signal in reservation in channel. 0 knot in streaming in CR can to determine if the candidate in decoding selected
collides with the decoding candidate used by the other device, and selecting another decoding candidate if there is a collision. For example, in one aspect, the CR transmission node can use a semi-static collision avoidance algorithm to reduce collisions. In some cases, for example, a given node may use the same decoding candidate for both CR-R and CR-T transmissions. CR transmission nodes, therefore, can monitor which decoding candidates are used by other CR transmission nodes, and whether a
Petition 870190051664, of 6/3/2019, p. 56/88
52/61 collision is detected (for example, the node determines that a neighboring node is using the same decoding candidate), the CR transmission nodes can switch to a different decoding candidate. This approach may be desirable for CR transmission nodes that have a number of active nodes in their neighborhood (for example, within a threshold proximity).
[0117] As such, the techniques presented in this document enable nodes to reuse the NR PDCCH waveform for the transmission of channel reserve signals. Through this action, the PDCCH that processes in hardware / firmware / software is allowed to be reused for channel reservation signals in NR, and the need for a new channel design in NR can be avoided.
[0118] As used herein, a phrase that refers to at least one of a list of items refers to any combination of such items, including unique members. As an example, at least one of: a, b or c is intended to cover a, b, c, ab, ac, bc and abc, as well as any combination with multiples of the same element (for example, aa, aaa, aab , a-ac, abb, acc, bb, bbb, bbc, cc and ccc or any other order of a, b and c). In addition, the term is either meant to mean one or inclusive instead of one or exclusive. That is, unless otherwise specified, or is evident from the context, the phrase X employs A or B is intended to mean any of the natural inclusive permutations. That is, the phrase X uses A or B is satisfied by any of the following cases: X uses A; X employs B; or X employs
Petition 870190051664, of 6/3/2019, p. 57/88
53/61 both A and B. In addition, articles one and one, as used in this application and the appended claims, should, in general, be interpreted to mean one or more, except where otherwise specified or evident from the context to be directed to a singular form.
[0119] The methods disclosed in this document comprise one or more steps or actions to achieve the described method. The steps and / or actions of the method can be interchanged with each other without departing from the scope of the claims. In other words, unless a specific order of steps and actions is specified, the order and / or use of specific steps and / or actions can be modified without departing from the scope of the claims.
[0120] As used in this document, the term determine covers a wide variety of actions. For example, determining may include calculating, computing, processing, deriving, investigating, identifying, querying (for example, querying in a table, database or other data structure), ascertaining and the like. In addition, determining may include receiving (for example, receiving information), accessing (for example, accessing data in a memory) and the like. Additionally, determining may include resolving, selecting, choosing, establishing and the like.
[0121] The previous description is provided to enable anyone skilled in the art to practice the various aspects described in this document. Several changes to these aspects will be readily apparent to those skilled in the art,
Petition 870190051664, of 6/3/2019, p. 58/88
54/61 and the generic principles defined in this document can be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown in this document, but should be attributed to the total scope consistent with the language of the claims, where the reference to an element in the singular is not intended to mean one and only one except when specifically stated, but one or more instead. Except where specifically stated otherwise, the term does not refer to one or more. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later will be known to the elements of common knowledge in the art are expressly incorporated into this reference document and are intended to be covered by the claims. In addition, nothing disclosed in this document is intended to be dedicated to the public, regardless of whether such disclosure may be explicitly recited in the claims. No claim element shall be interpreted under the provisions of Title 35 of the United States Code §112, sixth paragraph, except where the element is expressly quoted using the phrase middle to or, in the case of a method claim, the element is quoted using the phrase step for.
[0122] The various method operations described above can be performed by any suitable means capable of carrying out the corresponding functions. The media may include various hardware and / or software components and / or modules, including, but not limited to, a
Petition 870190051664, of 6/3/2019, p. 59/88
55/61 circuit, an application specific integrated circuit (ASIC) or a processor. In general, where there are operations illustrated in the Figures, these operations may have components of means plus corresponding counterpart function with similar numbering.
[0123] For example, the means to determine, the means to select, the means to perform, the means to use, the means to send, the means to transmit, the means to configure, the means to identify, the means to obtain, the means to align , means to choose, means to indicate, means to communicate, means to control, means to monitor, means to process and / or means to decode may include one or more processors or other elements, such as the transmission processor 420, controller / processor 440, receiving processor 438, MOD / DEMOD 432 and / or base station antenna (or antennas) 434 shown in Figure 4 and / or transmitting processor 464, controller / processor 480, receiving processor 458, DEMOD / MOD 454 and / or antenna (or antennas) 452 of user equipment 120 illustrated in Figure 4.
[0124] The various logic blocks, modules and illustrative circuits described in connection with the present disclosure can be implemented or carried out with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device (PLD), transistor or discrete gate logic, discrete hardware components or any combination thereof
Petition 870190051664, of 6/3/2019, p. 60/88
56/61 designed to perform the functions described in this document. A general purpose processor can be a microprocessor, however, alternatively, the processor can be any commercially available processor, controller, microcontroller or state machine. A processor can also be deployed as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core or any other such configuration.
[0125] If deployed on hardware, an exemplary hardware configuration can comprise a processing system on a wireless node. The processing system can be deployed with a bus architecture. The bus can include numerous interlaced buses and bridges that depend on the specific application of the processing system and the general design constraints. The bus can connect multiple circuits that include a processor, machine-readable media and a bus interface. The bus interface can be used to connect a network adapter, among other things, to the processing system via the bus. The network adapter can be used to implement the PHY layer signal processing functions. In the case of a 120 user terminal (see Figure 1), a user interface (for example, keyboard, display, mouse, joystick, etc.) can also be connected to the bus. The bus can also connect other circuits such as timing sources, peripherals, voltage regulators,
Petition 870190051664, of 6/3/2019, p. 61/88
57/61 power management circuits and the like, which are well known in the art and therefore will not be described further. The processor can be implemented with one or more general purpose and / or special purpose processors. Examples include microprocessors, microcontrollers, DSP processors and other circuitry that can run the software. Those skilled in the art will recognize how best to best implement the distinct functionality for the processing system depending on the particular application and the general design restrictions imposed on the general system.
[0126] If implemented in software, the functions can be stored or transmitted as one or more instructions or codes in a computer-readable medium. The Software must be interpreted widely, to mean instructions, data or any combination thereof, regardless of whether they are called software, firmware, middleware, microcode, hardware, language of description, or otherwise. Computer-readable media includes both computer storage media and communication media that include any media that facilitates the transfer of a computer program from one location to another. The processor may be responsible for managing the bus and general processing, including running software modules stored on machine-readable storage media. A computer-readable storage medium can be coupled to a processor, so that the processor can read information from, and write information to, the storage medium.
Petition 870190051664, of 6/3/2019, p. 62/88
58/61
Alternatively, the storage media can be an integral part of the processor. For example, machine-readable media may include a transmission line, a data wave modulated carrier and / or a computer-readable storage media with instructions stored on it separate from the wireless node, where all can be accessed by the processor through the bus interface. Alternatively or in addition, machine-readable media, or any portion thereof, can be integrated into the processor, as may be the case with cache and / or general log files. Examples of machine-readable storage media may include RAM (random access memory), flash memory, ROM (read-only memory), PROM (programmable read-only memory), EPROM (memory only). programmable and erasable read), EEPROM (electronically erasable and programmable read only memory), records, magnetic disks, optical disks, hard disks or any other suitable storage media or any combination thereof. Machine-readable media can be incorporated into a computer program product.
[0127] A software module can comprise a single instruction or many instructions, and can be distributed across several different code segments, between different programs and across multiple storage media. Computer-readable media can comprise numerous software modules. The software modules include instructions that, when executed by a device such as a processor, cause
Petition 870190051664, of 6/3/2019, p. 63/88
59/61 that the processing system performs various functions. Software modules can include a transmit module and a receive module. Each software module can be located on a single storage device or distributed across multiple storage devices. For example, a software module can be loaded into RAM from a hard disk when a triggering event occurs. During the execution of the software module, the processor can load some of the cached instructions to increase the access speed. One or more lines of cache can then be loaded into a general log file for execution via the processor. Referring to the functionality of a software module below, it will be understood that such functionality is implemented by the processor when executing instructions from that software module.
[0128] In addition, any connection is properly referred to as computer-readable media. For example, if the software is transmitted from a website, server or other remote source using a coaxial cable, a fiber optic cable, a twisted pair, a digital subscriber line (DSL) or wireless technologies like infrared, radio and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL or wireless technologies like infrared (IR), radio and microwave are included in the definition from media. Magnetic disk and optical disk, as used in this document, include compact disk (CD), laser disk, optical disk, digital versatile disk (DVD), floppy disk and Blu-ray® disk, in which the magnetic disks
Petition 870190051664, of 6/3/2019, p. 64/88
60/61 generally reproduce the data in a magnetic way, while optical discs reproduce the data in an optical way with lasers. Thus, in some respects, computer-readable media may comprise non-transitory computer-readable media (for example, tangible media). In addition, for other aspects, computer-readable media may comprise transitory computer-readable media (for example, a sign). The aforementioned combinations should also fall within the scope of computer-readable media.
[0129] Thus, certain aspects may comprise a computer program product to perform the operations presented in this document. For example, such a computer program product may comprise a computer-readable medium that has instructions stored (and / or encoded) in them, where the instructions are executable by one or more processors to perform the operations described in this document.
[0130] Additionally, it should be noted that the modules and / or other suitable means to carry out the methods and techniques described in this document can be downloaded and / or, otherwise, obtained by a user terminal and / or base station, as applicable. For example, such a device can be coupled to a server to facilitate the transfer of means to carry out the methods described in this document. Alternatively, several methods described in this document can be provided through storage media (for example, RAM, ROM, physical storage media such as a compact disc (CD) or a
Petition 870190051664, of 6/3/2019, p. 65/88
61/61 diskette, etc.), so that a user terminal and / or base station can obtain the various methods by coupling or supplying the storage media to the device. In addition, any other suitable technique for providing the methods and techniques described in this document for a device can be used.
[0131] It should be understood that the claims are not limited to the precise configuration and components illustrated above. Various modifications, alterations and variations can be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

权利要求:
Claims (29)
[1]
1. Method for wireless communication through an apparatus comprising:
determining one or more orthogonal frequency division (OFDM) multiplexing symbols to transmit channel reserve signals;
determining a plurality of resources available for transmitting the channel reserve signals during the one or more OFDM symbols;
selecting a set of resources within the plurality of resources to transmit a channel reservation signal; and transmitting the channel reservation signal on the selected set of resources to reserve a portion of spectrum for communication.
[2]
2. Method according to claim 1, wherein:
the plurality of resources for channel reservation signal transmission uses a downlink control channel structure; and the plurality of resources comprises one or more control channel elements (CCEs).
[3]
A method according to claim 1, which further comprises:
determining a plurality of decoding candidates available for sending channel reservation signals, wherein each decoding candidate comprises one or more control channel elements (CCEs); and
Petition 870190051664, of 6/3/2019, p. 67/88
2/8 select one of the decoding candidates to use for sending the channel reservation signal, where the selected set of resources comprises the CCEs of the selected decoding candidate.
[4]
4. Method according to claim 3, in which the selection of the one among the decoding candidates comprises randomly selecting a decoding candidate from the plurality of decoding candidates.
[5]
A method according to claim 3, which further comprises:
identify at least one other decoding candidate used by another device to send a channel reservation signal; determine whether the selected decoding candidate collides with the decoding candidate used by the other device; and select another decoding candidate if there is a collision.
[6]
6. Method according to claim 3, in which each CCE comprises one or more physical resource blocks (PRBs) and in which each PRB comprises a demodulation reference signal (DMRS).
[7]
Method according to claim 3, in which the determination of one or more OFDM symbols comprises selecting the same set of OFDM symbols chosen by at least one other device for transmitting a channel reserve signal in order to align transmissions from
Petition 870190051664, of 6/3/2019, p. 68/88
3/8 channel reserve signal.
[8]
A method according to claim 7, wherein the selected decoding candidate is different from a decoding candidate used for transmitting the channel reserve signal from the other device.
[9]
A method according to claim 1, wherein the channel reservation signal comprises a first channel reservation signal which indicates that the communication is for sending a transmission, or a second channel reservation signal which indicates that communication is for receiving a transmission.
[10]
10. The method of claim 9, wherein the first channel reservation signal comprises power control information relating to the communication.
[11]
A method according to claim 9, wherein the second channel reserve signal comprises power control information from the second channel reserve signal.
[12]
12. The method of claim 9, wherein:
the first channel reservation signal is transmitted at the same time as at least one other channel reservation signal from another device; and the other channel reservation signal indicates that a communication from the other device is for sending a transmission.
[13]
13. Method according to claim 12, wherein the set of resources used for the first
Petition 870190051664, of 6/3/2019, p. 69/88
4/8 channel reservation does not overlap a set of resources, within the plurality of resources, used for the other channel reservation signal.
[14]
14. The method of claim 9, wherein:
the second channel reservation signal is transmitted at the same time as at least one other channel reservation signal from another device; and the other channel reservation signal indicates that a communication from the other device is for receiving a transmission.
[15]
15. The method of claim 14, wherein the set of resources used for the second channel reservation signal does not overlap a set of resources, within the plurality of resources, used for the other channel reservation signal.
[16]
16. The method of claim 1, which further comprises:
transmitting a lease message to one or more user equipment (UEs) prior to transmission of the channel reservation signal, wherein the lease message comprises a lease for at least one of the uplink or downlink communications and indicates at least one of a time for each of the one or more UEs to transmit a channel reservation signal or a time for each of the one or more UEs to monitor a channel reservation signal.
Petition 870190051664, of 6/3/2019, p. 70/88
5/8
[17]
17. The method of claim 1, wherein the apparatus is a base station (BS) or user equipment (UE).
[18]
18. Method for wireless communication through a device comprising:
determining one or more orthogonal frequency division (OFDM) multiplexing symbols to monitor channel reserve signals;
determining a plurality of resources available for monitoring channel reservation signals during the one or more OFDM symbols; and monitoring one or more channel reservation signals transmitted over a set of resources within the plurality of resources.
[19]
19. The method of claim 18, wherein at least one of the channel reserve signals indicates that a communication over a portion of a spectrum is for sending a transmission.
[20]
20. The method of claim 18, wherein at least one of the channel reserve signals indicates that a communication over a portion of a spectrum is for receiving a transmission.
[21]
21. The method of claim 18, wherein monitoring the one or more channel reservation signals comprises:
determine a plurality of decoding candidates in the set of resources available for the
Petition 870190051664, of 6/3/2019, p. 71/88
6/8 sending one or more channel reservation signals, each channel reservation signal using one of the plurality of decoding candidates; and performing a blind decoding procedure through the plurality of decoding candidates for the one or more channel reservation signals.
[22]
22. The method of claim 21, wherein determining one or more OFDM symbols comprises selecting the same set of OFDM symbols chosen by at least one other device for monitoring a channel reserve signal in order to to align the monitoring of channel reservation signals.
[23]
23. Method according to claim 21, in which each decoding candidate comprises one or more control channel elements (CCEs), in which each CCE comprises one or more physical resource blocks (PRBs), and in which each PRB comprises a demodulation reference signal (DMRS).
[24]
24. The method of claim 23, which further comprises:
process one of the decoding candidates used for one of the channel reservation signals based on DMRSs.
[25]
25. The method of claim 18, wherein the plurality of resources available for monitoring the channel reserve signal uses a downlink control channel structure.
Petition 870190051664, of 6/3/2019, p. 72/88
7/8
[26]
26. The method of claim 18, which further comprises:
monitor a grant message on the plurality of resources; and determining, based on a schedule in the grant message, a time for monitoring one or more of the plurality of channel reservation signals.
[27]
27. The method of claim 18, wherein the apparatus comprises a base station (BS) or user equipment (UE).
[28]
28. Wireless communication device comprising:
means for determining one or more orthogonal frequency division (OFDM) multiplexing symbols for transmitting channel reserve signals;
means for determining a plurality of resources available for transmitting the channel reserve signals during the one or more OFDM symbols;
means for selecting a set of resources within the plurality of resources for transmitting a channel reservation signal; and means for transmitting the channel reservation signal on the selected set of resources to reserve a portion of spectrum for communication.
[29]
29. Wireless communication device comprising:
means to determine one or more symbols of
Petition 870190051664, of 6/3/2019, p. 73/88
8/8 orthogonal frequency division multiplexing (OFDM) to monitor channel reserve signals;
means for determining a plurality of resources available for monitoring channel reserve signals during the one or more OFDM symbols; and means for monitoring one or more channel reservation signals transmitted on a set of resources within the plurality of resources.

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

优先权:

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申请号 | 申请日 | 专利标题

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US201662435570P| true| 2016-12-16|2016-12-16|

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US15/708,949|US10779320B2|2016-12-16|2017-09-19|Channel reservation signal with new radio PDCCH waveform|

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PCT/US2017/062933|WO2018111516A1|2016-12-16|2017-11-22|Channel reservation signal with new radio pdcch waveform|

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