WO2021168765A1 - Transmission de liaison montante d'autorisation configurée pour un canal physique partagé montant avec de multiples canaux à accès multiple avec écoute de porteuse - Google Patents

Transmission de liaison montante d'autorisation configurée pour un canal physique partagé montant avec de multiples canaux à accès multiple avec écoute de porteuse Download PDF

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Publication number
WO2021168765A1
WO2021168765A1 PCT/CN2020/077071 CN2020077071W WO2021168765A1 WO 2021168765 A1 WO2021168765 A1 WO 2021168765A1 CN 2020077071 W CN2020077071 W CN 2020077071W WO 2021168765 A1 WO2021168765 A1 WO 2021168765A1
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Prior art keywords
lbt
channel
indicator
channels
communication
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PCT/CN2020/077071
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English (en)
Inventor
Changlong Xu
Xiaoxia Zhang
Jing Sun
Tao Luo
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Qualcomm Incorporated
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Priority to PCT/CN2020/077071 priority Critical patent/WO2021168765A1/fr
Publication of WO2021168765A1 publication Critical patent/WO2021168765A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

Definitions

  • aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for configured grant uplink transmission for a physical uplink shared channel (PUSCH) with multiple listen-before-talk (LBT) channels.
  • PUSCH physical uplink shared channel
  • LBT listen-before-talk
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, and/or the like) .
  • multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) .
  • LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • UMTS Universal Mobile Telecommunications System
  • a wireless communication network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs) .
  • a user equipment (UE) may communicate with a base station (BS) via the downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the BS to the UE
  • the uplink (or reverse link) refers to the communication link from the UE to the BS.
  • a BS may be referred to as a Node B, a gNB, an access point (AP) , a radio head, a transmit receive point (TRP) , a New Radio (NR) BS, a 5G Node B, and/or the like.
  • New Radio which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • 3GPP Third Generation Partnership Project
  • NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL) , using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink (UL) , as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • OFDM orthogonal frequency division multiplexing
  • SC-FDM e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)
  • DFT-s-OFDM discrete Fourier transform spread OFDM
  • MIMO multiple-input multiple-output
  • a method of wireless communication may include receiving an indicator from a base station, wherein the indicator is based, at least in part on, a channel occupancy time (COT) identified by the base station via a listen-before-talk (LBT) channel of a plurality of LBT channels; and selectively transmitting a physical uplink shared channel (PUSCH) communication on at least one LBT channel of the plurality of LBT channels based at least in part on the indicator and one or more configured grants.
  • COT channel occupancy time
  • LBT listen-before-talk
  • a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory.
  • the memory and the one or more processors may be configured to receive an indicator from a base station, wherein the indicator is based, at least in part on, a COT identified by the base station via an LBT channel of a plurality of LBT channels; and selectively transmit a PUSCH communication on at least one LBT channel of the plurality of LBT channels based at least in part on the indicator and one or more configured grants.
  • a non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a UE, may cause the one or more processors to receive an indicator from a base station, wherein the indicator is based, at least in part on, a COT identified by the base station via an LBT channel of a plurality of LBT channels; and selectively transmit a PUSCH communication on at least one LBT channel of the plurality of LBT channels based at least in part on the indicator and one or more configured grants.
  • an apparatus for wireless communication may include means for receiving an indicator from a base station, wherein the indicator is based, at least in part on, a COT identified by the base station via an LBT channel of a plurality of LBT channels; and means for selectively transmitting a PUSCH communication on at least one LBT channel of the plurality of LBT channels based at least in part on the indicator and one or more configured grants.
  • aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.
  • Fig. 1 is a block diagram conceptually illustrating an example of a wireless communication network, in accordance with various aspects of the present disclosure.
  • Fig. 2 is a block diagram conceptually illustrating an example of a base station in communication with a UE in a wireless communication network, in accordance with various aspects of the present disclosure.
  • Figs. 3A-3D are diagrams illustrating examples associated with configured grant uplink transmission for a PUSCH with multiple LBT channels, in accordance with various aspects of the present disclosure.
  • Fig. 4 is a diagram illustrating an example process performed, for example, by a user equipment, in accordance with various aspects of the present disclosure.
  • Fig. 1 is a diagram illustrating a wireless network 100 in which aspects of the present disclosure may be practiced.
  • the wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network.
  • the wireless network 100 may include a number of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities.
  • a BS is an entity that communicates with user equipment (UEs) and may also be referred to as a base station, a NR BS, a Node B, a gNB, a 5G node B (NB) , an access point, a transmit receive point (TRP) , and/or the like.
  • Each BS may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a BS and/or a BS subsystem serving this coverage area, depending on the context in which the term is used.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell.
  • a macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a closed subscriber group (CSG) ) .
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a pico cell may be referred to as a pico BS.
  • a BS for a femto cell may be referred to as a femto BS or a home BS.
  • a BS 110a may be a macro BS for a macro cell 102a
  • a BS 110b may be a pico BS for a pico cell 102b
  • a BS 110c may be a femto BS for a femto cell 102c.
  • a BS may support one or multiple (e.g., three) cells.
  • eNB base station
  • NR BS NR BS
  • gNB gNode B
  • AP AP
  • node B node B
  • 5G NB 5G NB
  • cell may be used interchangeably herein.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS.
  • the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces such as a direct physical connection, a virtual network, and/or the like using any suitable transport network.
  • Wireless network 100 may also include relay stations.
  • a relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS) .
  • a relay station may also be a UE that can relay transmissions for other UEs.
  • a relay station 110d may communicate with macro BS 110a and a UE 120d in order to facilitate communication between BS 110a and UE 120d.
  • a relay station may also be referred to as a relay BS, a relay base station, a relay, and/or the like.
  • Wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and/or the like. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in wireless network 100.
  • macro BSs may have a high transmit power level (e.g., 5 to 40 Watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 Watts) .
  • a network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs.
  • Network controller 130 may communicate with the BSs via a backhaul.
  • the BSs may also communicate with one another, e.g., directly or indirectly via a wireless or wireline backhaul.
  • UEs 120 may be dispersed throughout wireless network 100, and each UE may be stationary or mobile.
  • a UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, and/or the like.
  • a UE may be a cellular phone (e.g., a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet) ) , an entertainment device (e.g., a music or video device, or a satellite radio) , a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.
  • PDA personal digital assistant
  • WLL wireless local loop
  • Some UEs may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs.
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, and/or the like, that may communicate with a base station, another device (e.g., remote device) , or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • Some UEs may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband internet of things) devices.
  • IoT Internet-of-Things
  • NB-IoT narrowband internet of things
  • UE 120 may be included inside a housing that houses components of UE 120, such as processor components, memory components, and/or the like.
  • the processor components and the memory components may be coupled together.
  • the processor components e.g., one or more processors
  • the memory components e.g., a memory
  • the processor components and the memory components may be operatively coupled, communicatively coupled, electronically coupled, electrically coupled, and/or the like.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular radio access technology (RAT) and may operate on one or more frequencies.
  • a RAT may also be referred to as a radio technology, an air interface, and/or the like.
  • a frequency may also be referred to as a carrier, a frequency channel, and/or the like.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • two or more UEs 120 may communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another) .
  • the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, and/or the like) , a mesh network, and/or the like.
  • V2X vehicle-to-everything
  • the UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.
  • Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.
  • Fig. 2 shows a block diagram of a design 200 of base station 110 and UE 120, which may be one of the base stations and one of the UEs in Fig. 1.
  • Base station 110 may be equipped with T antennas 234a through 234t
  • UE 120 may be equipped with R antennas 252a through 252r, where in general T ⁇ 1 and R ⁇ 1.
  • a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS (s) selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and/or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and/or the like) and provide overhead symbols and control symbols.
  • MCS modulation and coding schemes
  • Transmit processor 220 may also generate reference symbols for reference signals (e.g., the cell-specific reference signal (CRS) ) and synchronization signals (e.g., the primary synchronization signal (PSS) and secondary synchronization signal (SSS) ) .
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream.
  • TX transmit
  • MIMO multiple-input multiple-output
  • Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream.
  • Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.
  • the synchronization signals can be generated with location encoding to convey additional information.
  • antennas 252a through 252r may receive the downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively.
  • Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (e.g., for OFDM and/or the like) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280.
  • a channel processor may determine reference signal received power (RSRP) , received signal strength indicator (RSSI) , reference signal received quality (RSRQ) , channel quality indicator (CQI) , and/or the like.
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • RSRQ reference signal received quality
  • CQI channel quality indicator
  • one or more components of UE 120 may be included in a housing.
  • a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports comprising RSRP, RSSI, RSRQ, CQI, and/or the like) from controller/processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and/or the like) , and transmitted to base station 110.
  • modulators 254a through 254r e.g., for DFT-s-OFDM, CP-OFDM, and/or the like
  • the uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120.
  • Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller/processor 240.
  • Base station 110 may include communication unit 244 and communicate to network controller 130 via communication unit 244.
  • Network controller 130 may include communication unit 294, controller/processor 290, and memory 292.
  • Controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform one or more techniques associated with configured grant uplink transmission for a PUSCH with multiple LBT channels, as described in more detail elsewhere herein.
  • controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform or direct operations of, for example, process 400 of Fig. 4 and/or other processes as described herein.
  • Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively.
  • memory 242 and/or memory 282 may comprise a non-transitory computer-readable medium storing one or more instructions for wireless communication.
  • the one or more instructions when executed (e.g., directly, or after compiling, converting, interpreting, and/or the like) by one or more processors of the base station 110 and/or the UE 120, may perform or direct operations of, for example, process 400 of Fig. 4 and/or other processes as described herein.
  • executing instructions may include running the instructions, converting the instructions, compiling the instructions, interpreting the instructions, and/or the like.
  • a scheduler 246 may schedule UEs for data transmission on the downlink and/or uplink.
  • UE 120 may include means for receiving an indicator from a base station, wherein the indicator is based, at least in part on, a COT identified by the base station via an LBT channel of a plurality of LBT channels; means for selectively transmitting a PUSCH communication on at least one LBT channel of the plurality of LBT channels based at least in part on the indicator and one or more configured grants; and/or the like.
  • such means may include one or more components of UE 120 described in connection with Fig. 2, such as controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and/or the like.
  • Fig. 2 is provided as an example. Other examples may differ from what is described with regard to Fig. 2.
  • a wireless node such as a base station or a UE, may be permitted to use a channel on which the wireless node is to perform a clear channel assessment (CCA) prior to using the channel for wireless communication.
  • the wireless node may be configured to perform a listen-before-talk (LBT) procedure on the channel in association with gaining access to the channel.
  • LBT listen-before-talk
  • Such a channel is herein referred to as an LBT channel.
  • a frequency range reserved for unlicensed spectrum may be composed of a number of LBT channels.
  • the wireless node When a wireless node successfully performs an LBT procedure for an LBT channel, the wireless node gains access to the LBT channel for a length of time referred to as a channel occupancy time (COT) .
  • the duration of the COT may be dependent on the type of LBT procedure (e.g., category type 2, category type 4, or the like) and/or one or more LBT parameters used for the LBT procedure.
  • the wireless node experiences an LBT failure when the wireless node fails to transmit a transmission during a transmission instance. For example, when an interfering node, such as another wireless node, attempts to access the same communication resources as the wireless node, the interfering node may transmit transmissions that interfere with transmissions of the wireless node.
  • a wireless node may perform multiple iterations of the LBT procedure.
  • a wireless node can perform wireless communications operations without performing additional LBT procedures. For example, if a base station performs an LBT procedure and successfully acquires an LBT channel, then the base station may transmit one or more downlink communications during the COT without a need to perform additional LBT procedures.
  • the base station may additionally or alternatively allocate one or more sets of resources to one or more UEs during the COT such that the one or more UEs can attempt respective transmissions of uplink communications during the base station acquired COT.
  • a UE that has been allocated resources during a base station acquired COT may perform an LBT procedure during the COT in association with attempting to transmit an uplink communication in the allocated resources.
  • the UE may transmit one or more uplink communications during the COT without a need to perform additional LBT procedures.
  • multi-channel LBT may be deployed, meaning that a UE is permitted to use multiple LBT channels.
  • the UE performs an LBT procedure for multiple LBT channels, and can use any of the multiple LBT channels that are available.
  • a UE randomly selects one of the multiple LBT channels on which to perform category type 4 LBT and performs category type 2 on other LBT channels if the following conditions are satisfied: (1) the UE is scheduled or configured to transmit on the multiple LBT channels, (2) one or more associated uplink grants indicate category type 4 LBT and the same PUSCH starting position across the LBT channels or the uplink transmissions are to start at the same time for all LBT channels, and (3) the multiple LBT channels are as grouped in conformance to WiFi channel bonding rules.
  • the term LBT channel as used herein can denote either an LBT subband or an LBT carrier.
  • resources indicated by in an uplink grant can span multiple LBT channels on which a UE is permitted to communicate.
  • resources identified in an uplink grant may span multiple LBT channels in wideband operation when a system bandwidth includes multiple LBT subbands.
  • resources indicated by an uplink grant may span multiple LBT channels in an uplink carrier aggregation scenario when the UE is scheduled or configured to transmit on multiple uplink carriers.
  • resources associated with an uplink communication e.g., resources indicated to be used for a physical uplink shared channel (PUSCH) communication
  • PUSCH physical uplink shared channel
  • a base station may acquire a subset of the multiple LBT channels. For example, when resources associated with a PUSCH communication span four LBT channels (e.g., channels 0, 1, 2, and 3) , it is possible that a base station may have access on channels 0 and 1, but not on channels 2 and 3.
  • a configuration of the configured grant may span the multiple LBT channels.
  • the base station acquires a COT on one of the multiple LBTs channel and indicates that the COT is not to be used for uplink transmissions.
  • a UE may not be permitted to transmit an uplink communication associated with a configured grant when a slot format indicator (SFI) in a COT structure indicator (COT-SI) indicates a slot as a downlink slot or as a flexible slot.
  • SFI slot format indicator
  • COT-SI COT structure indicator
  • a UE behavior for transmitting the uplink communication associated with a configured grant across multiple LBT channels should be defined.
  • Some aspects described herein provide techniques and apparatuses for transmitting an uplink communication (e.g., a PUSCH communication) associated with a configured grant that spans multiple LBT channels.
  • an uplink communication e.g., a PUSCH communication
  • Figs. 3A-3D are diagrams illustrating examples associated with configured grant transmission for a PUSCH with multiple LBT channels, in accordance with various aspects of the present disclosure.
  • a UE e.g., UE 120
  • the UE has received (e.g., from the base station) one or more configured grants that indicate resources spanning the multiple LBT channels, and the UE is to transmit a PUSCH communication based at least in part on one or more configured grants.
  • a base station may identify a COT via one of the multiple LBT channels. For example, the base station may perform an LBT procedure (e.g., category type 2, category type 4) on each of the multiple LBT channels and, in this example, one of the multiple LBT channels passes the LBT procedure. Thus, the base station obtains the right to use the LBT channel during a COT associated with the LBT channel.
  • an LBT procedure e.g., category type 2, category type 4
  • the base station may provide an indicator, the indicator being based at least in part on the COT identified by the base station.
  • the UE may receive the indicator provided by the base station.
  • the indicator includes a COT structure indicator including one or more slot format indicators (SFIs) associated with the COT.
  • SFIs slot format indicators
  • a given SFI may indicate a format of a slot corresponding to the SFI (e.g., the given SFI may be an indication of whether the corresponding slot is a downlink slot, a flexible slot, or an uplink slot) . Additional details regarding the indicator are provided below.
  • the UE may selectively transmit the PUSCH communication on at least the LBT channel based at least in part on the indicator and the one or more configured grants.
  • the indicator indicates that a set of resources associated with a configured grant, of the one or more configured grants, is within a slot of the COT that is to be used for downlink communications. That is, the indicator may indicate that resources of a configured grant are in a downlink slot of the COT associated with the LBT channel (e.g., a slot of the COT on the LBT channel that is to be used for downlink communications) . In such a case, when selectively transmitting the PUSCH communication, the UE may refrain from transmitting the PUSCH communication on the multiple LBT channels.
  • a configured grant resource may not be within an uplink slot of the COT (e.g., when the slot is indicated in an SFI as a downlink slot) .
  • the PUSCH transmission associated with one or more configured grants may be cancelled when configured grant resources, associated with one of the configured grants, are within a downlink slot in the COT.
  • Fig. 3B is a diagram illustrating an example associated with a UE refraining from transmitting a PUSCH communication on multiple LBT channels when an indicator, associated with a COT acquired on one of multiple LBT channels, indicates that resources of a configured grant are in a downlink slot of the COT.
  • LBT channel C1 has passed LBT at the base station, while LBT channels C0, C2, C3 have not.
  • the base station has acquired a COT on LBT channel C1.
  • the base station provides, and the UE receives, an indicator that indicates that a slot of the COT is a downlink slot.
  • the UE may determine that resources of a configured grant are within the downlink slot of the COT, and may refrain from transmitting (e.g., cancels) the configured grant PUSCH transmission on all of the multiple channels C0 through C3 (e.g., since the resources associated with the configured grant fall into the downlink slot of the COT on LBT channel C1) .
  • the indicator indicates that a set of resources associated with a configured grant, of the one or more configured grants, is within a slot of the COT for uplink communications, and that COT sharing is not permitted in the slot. That is, the indicator may indicate that resources of a configured grant are in an uplink slot of the COT associated with the LBT channel (e.g., a slot of the COT on the LBT channel that is to be used for uplink communications) , and may also indicate that COT sharing is not permitted in the slot. In such a case, when selectively transmitting the PUSCH communication, the UE may refrain from transmit the PUSCH communication on one or more of the multiple LBT channels.
  • a configured grant resource may be within an uplink slot of the COT, but COT sharing may not be permitted in the slot.
  • the PUSCH transmission associated with the configured grant may be cancelled on one or more of the multiple LBT channels (e.g., a set of LBT channels associated with the configured grant, or the LBT channel associated with the indicator) when configured grant resources are within an uplink slot in the COT in which COT sharing is not permitted.
  • Fig. 3C is a diagram illustrating an example associated with a UE refraining from transmitting a PUSCH communication on a set of LBT channels associated with a configured grant when an indicator, associated with a COT acquired on one of multiple LBT channels, indicates that resources of the configured grant are in an uplink slot of the COT in which COT sharing is not permitted.
  • LBT channel C1 has passed LBT at the base station, while LBT channels C0, C2, C3 have not.
  • the base station has acquired a COT on LBT channel C1.
  • the base station provides, and the UE receives, an indicator that indicates that a slot of the COT is a uplink slot, and that COT sharing is not permitted in the uplink slot.
  • the UE determines that resources of a configured grant are within the uplink slot of the COT, and refrains from transmitting (e.g., cancels) the configured grant PUSCH transmission on the set of channels associated with the configured grant.
  • each of the multiple channels e.g., LBT channels C0 through C3
  • the UE cancels the PUSCH transmission on all of the multiple LBT channels.
  • a first set of the multiple LBT channels e.g., LBT channels C0 and C1
  • a second set of the multiple LBT channels e.g., LBT channels C2 and C3 may be associated with another configured grant.
  • the UE may cancel the PUSCH transmission on the first set of LBT channels (e.g., since the first set of LBT channels is associated with the configured grant) and may transmit the PUSCH communication on one or more of the second set of LBT channels (e.g., since the second set of LBT channels is associated with a different configured grant) .
  • the UE may transmit the PUSCH communication on one or more of the second set of LBT channels based at least in part on performing multi-channel access on each of the second set of LBT channels (e.g., using appropriate LBT types) .
  • Fig. 3D is a diagram illustrating an example associated with a UE refraining from transmitting a PUSCH communication on one LBT channel when an indicator, associated with a COT acquired on the LBT channel, indicates that resources of the configured grant are in an uplink slot of the COT in which COT sharing is not permitted.
  • LBT channel C1 has passed LBT at the base station, while LBT channels C0, C2, C3 have not.
  • the base station has acquired a COT on LBT channel C1.
  • the base station provides, and the UE receives, an indicator that indicates that a slot of the COT is a uplink slot, and that COT sharing is not permitted in the uplink slot.
  • the UE refrains from transmitting (e.g., cancels) the configured grant PUSCH transmission on the LBT channel.
  • the UE may transmit the configured grant PUSCH communication on at least one other LBT channels of the multiple LBT channels.
  • the UE may transmit the PUSCH communication on the at least one other LBT channel based at least in part on performing multi-channel access on each of the other LBT channels (e.g., using appropriate LBT types) .
  • the PUSCH communication when transmitting the PUSCH communication on the at least one other LBT channel, the PUSCH communication is punctured on the LBT channel. In some aspects, when transmitting the PUSCH communication on the at least one other LBT channel, the PUSCH communication is rate-matched around the LBT channel. In the case of rate-matching around the LBT channel, a transport block size, associated with the PUSCH communication, may be based at least in part on the configured grant, in some aspects, or may be adjusted by excluding the LBT channel.
  • Figs. 3A-3D are provided as examples. Other examples may differ from what is described with respect to Figs. 3A-3D.
  • Fig. 4 is a diagram illustrating an example process 400 performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Example process 400 is an example where the UE (e.g., UE 120 and/or the like) performs operations associated with a configured grant uplink transmission for a PUSCH with multiple LBT channels.
  • the UE e.g., UE 120 and/or the like
  • process 400 may include receiving an indicator from a base station, wherein the indicator is based, at least in part on, a COT identified by the base station via an LBT channel of a plurality of LBT channels (block 410) .
  • the UE e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller/processor 280, memory 282, and/or the like
  • the indicator is based, at least in part on, a COT identified by the base station via an LBT channel of a plurality of LBT channels.
  • process 400 may include selectively transmitting a PUSCH communication on at least one LBT channel of the plurality of LBT channels based at least in part on the indicator and one or more configured grants (block 420) .
  • the UE e.g., using controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, and/or the like
  • Process 400 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • the indicator includes a slot format indicator and a COT structure indicator.
  • the indicator indicates that a set of resources associated with a configured grant, of the one or more configured grants, is within a slot of the COT for downlink communications.
  • selectively transmitting the PUSCH communication includes refraining from transmitting the PUSCH communication on the plurality of LBT channels based at least in part on the indicator indicating that the set of resources associated with the configured grant is within the slot of the COT for downlink communications.
  • the indicator indicates that a set of resources associated with a configured grant, of the one or more configured grants, is within a slot of the COT for uplink communications, and that COT sharing is not permitted in the slot.
  • selectively transmitting the PUSCH communication includes refraining from transmitting the PUSCH communication on a subset of LBT channels, of the plurality of LBT channels, the subset of LBT channels being associated with the configured grant.
  • selectively transmitting the PUSCH communication further includes identifying another subset of LBT channels of the plurality of LBT channels, the another subset of LBT channels being associated with another configured grant of the one or more configured grants, and transmitting the PUSCH communication on one or more LBT channels of the another subset of LBT channels.
  • selectively transmitting the PUSCH communication includes refraining from transmitting the PUSCH communication on the LBT channel.
  • selectively transmitting the PUSCH communication further includes identifying other LBT channels of the plurality of LBT channels, and transmitting the PUSCH communication on at least one LBT channel of the other LBT channels.
  • the PUSCH communication is punctured on the LBT channel when transmitted on the at least one LBT channel.
  • the PUSCH communication is rate-matched around the LBT channel when transmitted on the at least one LBT channel.
  • a transport block size, associated with the PUSCH communication is based at least in part on the configured grant.
  • process 400 includes excluding the LBT channel to adjust a transport block size associated with the PUSCH communication.
  • process 400 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 4. Additionally, or alternatively, two or more of the blocks of process 400 may be performed in parallel.
  • ком ⁇ онент is intended to be broadly construed as hardware, firmware, and/or a combination of hardware and software.
  • a processor is implemented in hardware, firmware, and/or a combination of hardware and software.
  • satisfying a threshold may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and/or the like.
  • “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .
  • the terms “has, ” “have, ” “having, ” and/or the like are intended to be open-ended terms. Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Divers aspects de la présente divulgation concernent de manière générale la communication sans fil. Selon certains aspects, un équipement utilisateur (UE) peut recevoir un indicateur en provenance d'une station de base, l'indicateur étant basé, au moins en partie, sur un temps d'occupation de canal (COT) identifié par la station de base par l'intermédiaire d'un canal à accès multiple avec écoute de porteuse (LBT) d'une pluralité de canaux LBT ; et pour transmettre de manière sélective une communication de canal physique partagé montant (PUSCH) sur au moins un canal LBT de la pluralité de canaux LBT sur la base, au moins en partie, de l'indicateur et d'une ou plusieurs autorisations configurées. De nombreux autres aspects sont fournis.
PCT/CN2020/077071 2020-02-28 2020-02-28 Transmission de liaison montante d'autorisation configurée pour un canal physique partagé montant avec de multiples canaux à accès multiple avec écoute de porteuse WO2021168765A1 (fr)

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CN109496457A (zh) * 2018-10-25 2019-03-19 北京小米移动软件有限公司 Dci的接收方法、发送方法、装置及存储介质
US20190289614A1 (en) * 2016-08-12 2019-09-19 Zte Corporation Data transmission method and apparatus
CN110291835A (zh) * 2019-05-17 2019-09-27 北京小米移动软件有限公司 随机接入配置信息获取方法、系统及设备
WO2019192285A1 (fr) * 2018-04-04 2019-10-10 中兴通讯股份有限公司 Procédé et dispositif de transmission et de communication en liaison montante, station de base, terminal et support de stockage

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US20190289614A1 (en) * 2016-08-12 2019-09-19 Zte Corporation Data transmission method and apparatus
WO2019192285A1 (fr) * 2018-04-04 2019-10-10 中兴通讯股份有限公司 Procédé et dispositif de transmission et de communication en liaison montante, station de base, terminal et support de stockage
CN109496457A (zh) * 2018-10-25 2019-03-19 北京小米移动软件有限公司 Dci的接收方法、发送方法、装置及存储介质
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