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WO2025211462A1 - Équipements d'utilisateur et procédés de communication - Google Patents

Équipements d'utilisateur et procédés de communication

Info

Publication number
WO2025211462A1
WO2025211462A1 PCT/JP2025/080052 JP2025080052W WO2025211462A1 WO 2025211462 A1 WO2025211462 A1 WO 2025211462A1 JP 2025080052 W JP2025080052 W JP 2025080052W WO 2025211462 A1 WO2025211462 A1 WO 2025211462A1
Authority
WO
WIPO (PCT)
Prior art keywords
sub
channel
psfch
pssch
channels
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2025/080052
Other languages
English (en)
Inventor
Liqing Liu
Daiichiro Nakashima
Shoichi Suzuki
Hiroshi Takahashi
Makoto Kitahara
Kozue YOKOMAKURA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Publication of WO2025211462A1 publication Critical patent/WO2025211462A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/40—Resource management for direct mode communication, e.g. D2D or sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received

Definitions

  • the present disclosure relates to a user equipment, and a communication method.
  • LTE Long Term Evolution
  • LTE-A Pro LTE-Advanced Pro
  • NR New Radio technology
  • eMBB enhanced Mobile BroadBand
  • URLLC UltraReliable and Low Latency Communication
  • mMTC massive Machine Type Communication
  • wireless communication devices may communicate with one or more device.
  • sidelink communication two communication devices can communicate with each other via PC5 interface.
  • the flexibility and/or the efficiency of the whole sidelink communication system would be limited.
  • systems and methods according to the present invention supporting sidelink communication over unlicensed spectrum, which may improve the communication flexibility and/or efficiency, would be beneficial.
  • Figure 1 is a block diagram illustrating one configuration of one or more base stations and one or more user equipments (UEs) in which systems and methods for determination of frequency resources for a PSFCH occasion in a resource pool for SL transmissions may be implemented;
  • UEs user equipments
  • Figure 2 is a diagram illustrating one example 200 of a resource grid
  • Figure 3 is a diagram illustrating one example 300 of common resource block grid, carrier configuration and BWP configuration by a UE 102 and a base station 160;
  • Figure 5 is a diagram illustrating one example 500 of interlaced transmission and reception in a BWP
  • Figure 7 is a diagram illustrating one example 700 of a SL carrier with intracell guard band(s);
  • Figure 9 is a diagram illustrating another example 900 of sub-channel determination in a resource pool by a UE 102;
  • Figure 12 illustrates various components that may be utilized in a UE
  • a user equipment includes reception unit configure to receive a PSSCH in a SL resource pool, the SL resource pool consisting of multiple RB sets and one or more intra-cell guard bands in frequency domain, and the PSSCH been allocated with a first number, N, of sub-channels; and control circuitry configured to determine Physical Sidelink Feedback Channel (PSFCH) resources for the PSSCH based on a second number, M, of sub-channels, wherein the M sub-channels are selected from the N sub-channels, and wherein all Physical Resource Blocks (PRBs) of each of the M sub-channels are contained within a single RB set.
  • PSFCH Physical Sidelink Feedback Channel
  • the method includes receiving a PSSCH in a SL resource pool, the SL resource pool consisting of multiple RB sets and one or more intra-cell guard bands in frequency domain, and the PSSCH been allocated with a first number, N, of sub-channels; and determining Physical Sidelink Feedback Channel (PSFCH) resources for the PSSCH based on a second number, M, of sub-channels, wherein the M sub-channels are selected from the N sub-channels, and wherein all Physical Resource Blocks (PRBs) of each of the M sub-channels are contained within a single RB set.
  • PSFCH Physical Sidelink Feedback Channel
  • LTE has been modified to provide support and specification (TS 38.331, 38.321, 38.300, 37.340, 38.211, 38.212, 38.213, 38.214, etc.) for the New Radio Access (NR) and Next generation - Radio Access Network (NG-RAN).
  • NR New Radio Access
  • NG-RAN Next generation - Radio Access Network
  • a wireless communication device may be an electronic device used to communicate voice and/or data to a base station, which in turn may communicate with a network of devices (e.g., public switched telephone network (PSTN), the Internet, etc.).
  • a wireless communication device may alternatively be referred to as a mobile station, a UE (User Equipment), an access terminal, a subscriber station, a mobile terminal, a remote station, a user terminal, a terminal, a subscriber unit, a mobile device, a relay node, etc.
  • Each of the one or more UEs 102 may include one or more transceivers 118, one or more demodulators 114, one or more decoders 108, one or more encoders 150, one or more modulators 154, one or more data buffers 104 and one or more UE operations modules 124.
  • one or more reception and/or transmission paths may be implemented in the UE 102.
  • only a single transceiver 118, decoder 108, demodulator 114, encoder 150 and modulator 154 are illustrated in the UE 102, though multiple parallel elements (e.g., transceivers 118, decoders 108, demodulators 114, encoders 150 and modulators 154) may be implemented.
  • the one or more transmitters 158 may transmit signals (e.g., uplink channels, uplink signals, sidelink channels, sidelink signals) to the base station 160 or to another UE 102 using one or more antennas 122a-n.
  • the one or more transmitters 158 may upconvert and transmit one or more modulated signals 156.
  • the demodulator 114 may demodulate the one or more received signals 116 to produce one or more demodulated signals 112.
  • the one or more demodulated signals 112 may be provided to the decoder 108.
  • the UE 102 may use the decoder 108 to decode signals.
  • the decoder 108 may produce one or more decoded signals 106, 110.
  • a first UE-decoded signal 106 may comprise received payload data, which may be stored in a data buffer 104.
  • a second UE-decoded signal 110 may comprise overhead data and/or control data.
  • the second UE-decoded signal 110 may provide data that may be used by the UE operations module 124 to perform one or more operations.
  • module may mean that a particular element or component may be implemented in hardware, software or a combination of hardware and software. However, it should be noted that any element denoted as a “module” herein may alternatively be implemented in hardware.
  • the UE operations module 124 may be implemented in hardware, software or a combination of both.
  • the UE operations module 124 may enable the UE 102 to communicate with the one or more base stations 160.
  • the UE operations module 124 may enable the UE 102 to communicate with the one or more other UE.
  • the UE operations module 124 may include a UE RRC information configuration module 126.
  • the UE operations module 124 may include a UE sidelink (SL) control module (unit) 128.
  • the UE operations module 124 may include physical (PHY) entities, Medium Access Control (MAC) entities, Radio Link Control (RLC) entities, packet data convergence protocol (PDCP) entities, and a Radio Resource Control (RRC) entity.
  • the UE RRC information configuration module 126 may process RRC parameter for random access configurations, initial UL BWP configuration, maximum bandwidth the UE can support, and cell specific PUCCH resource configuration(s).
  • the UE operations module 124 may provide information 148 to the one or more receivers 120. For example, the UE operations module 124 may inform the receiver(s) 120 when or when not to receive transmissions based on the Radio Resource Control (RRC) message (e.g., broadcasted system information, RRC reconfiguration message), MAC control element, SCI (Sidelink Control Information) and/or the DCI (Downlink Control Information).
  • RRC Radio Resource Control
  • the UE operations module 124 may provide information 148, including the PDCCH monitoring occasions, DCI format size, PSCCH monitoring occasions and SCI format size, to the one or more receivers 120.
  • the UE operation module 124 may inform the receiver(s) 120 when or where to receive/monitor the PDCCH candidate for DCI formats and/or the PSCCH candidate for SCI formats.
  • DCI formats can be used at least for scheduling of SL transmission(s) (PSCCH and/or PSSCH transmission(s)) in one cell and/or for scheduling of PUSCH and/or PDSCH in one cell.
  • the UE operations module 124 may provide information 136 to the decoder 108. For example, the UE operations module 124 may inform the decoder 108 of an anticipated encoding for transmissions from the base station 160. For example, the UE operations module 124 may inform the decoder 108 of an anticipated PDCCH candidate encoding with which DCI size for transmissions from the base station 160. The UE operations module 124 may inform the decoder 108 of an anticipated PSCCH candidate encoding with which SCI size for transmissions from another UE 102.
  • the encoder 150 may encode transmission data 146 and/or other information 142 provided by the UE operations module 124. For example, encoding the data 146 and/or other information 142 may involve error detection and/or correction coding, mapping data to space, time and/or frequency resources for transmission, multiplexing, etc.
  • the encoder 150 may provide encoded data 152 to the modulator 154.
  • the UE operations module 124 may provide information 144 to the modulator 154. For example, the UE operations module 124 may inform the modulator 154 of a modulation type (e.g., constellation mapping) to be used for transmissions to the base station 160.
  • the modulator 154 may modulate the encoded data 152 to provide one or more modulated signals 156 to the one or more transmitters 158.
  • the UE operations module 124 may provide information 140 to the one or more transmitters 158.
  • This information 140 may include instructions for the one or more transmitters 158.
  • the UE operations module 124 may instruct the one or more transmitters 158 when to transmit a signal to the base station 160 or another UE 102.
  • the one or more transmitters 158 may upconvert and transmit the modulated signal(s) 156 to one or more base stations 160 or another one or more UEs 102.
  • the base station 160 may include one or more transceivers 176, one or more demodulators 172, one or more decoders 166, one or more encoders 109, one or more modulators 113, one or more data buffers 162 and one or more base station operations modules 182.
  • one or more reception and/or transmission paths may be implemented in a base station 160.
  • only a single transceiver 176, decoder 166, demodulator 172, encoder 109 and modulator 113 are illustrated in the base station 160, though multiple parallel elements (e.g., transceivers 176, decoders 166, demodulators 172, encoders 109 and modulators 113) may be implemented.
  • the transceiver 176 may include one or more receivers (reception units) 178 and one or more transmitters (transmission units) 117.
  • the one or more receivers 178 may receive signals (e.g., uplink channels, uplink signals) from the UE 102 using one or more antennas 180a-n.
  • the receiver 178 may receive and downconvert signals to produce one or more received signals 174.
  • the one or more received signals 174 may be provided to a demodulator 172.
  • the one or more transmitters 117 may transmit signals (e.g., downlink channels, downlink signals) to the UE 102 using one or more antennas 180a-n.
  • the one or more transmitters 117 may upconvert and transmit one or more modulated signals 115.
  • the demodulator 172 may demodulate the one or more received signals 174 to produce one or more demodulated signals 170.
  • the one or more demodulated signals 170 maybe provided to the decoder 166.
  • the base station 160 may use the decoder 166 to decode signals.
  • the decoder 166 may produce one or more decoded signals 164, 168.
  • a first base station-decoded signal 164 may comprise received payload data, which may be stored in a data buffer 162.
  • a second base station-decoded signal 168 may comprise overhead data and/or control data.
  • the second base station-decoded signal 168 may provide data (e.g., PUSCH transmission data) that may be used by the base station operations module 182 to perform one or more operations.
  • the base station operations module 182 may enable the base station 160 to communicate with the one or more UEs 102.
  • the UE operations module 124 may enable the base station 160 to communicate with the one or more UEs 102 capable of sidelink communication.
  • the base station operations module 182 may include a base station RRC information configuration module 194.
  • the base station operations module 182 may include a base station sidelink (SL) control module 196 (or a base station SL processing module 196).
  • the base station operations module 182 may include PHY entities, MAC entities, RLC entities, PDCP entities, and an RRC entity.
  • the base station SL control module 196 may determine, for respective UE, the time and frequency resources for scheduling PSCCH and PSSCH and input the information to the base station RRC information configuration module 194.
  • the base station operations module 182 may provide information 188 to the demodulator 172.
  • the base station operations module 182 may inform the demodulator 172 of a modulation pattern anticipated for transmissions from the UE(s) 102.
  • the base station operations module 182 may provide information 186 to the decoder 166. For example, the base station operations module 182 may inform the decoder 166 of an anticipated encoding for transmissions from the UE(s) 102.
  • the base station operations module 182 may provide information 101 to the encoder 109.
  • the information 101 may include data to be encoded and/or instructions for encoding.
  • the base station operations module 182 may instruct the encoder 109 to encode transmission data 105 and/or other information 101.
  • the base station operations module 182 may enable the base station 160 to communicate with one or more network nodes (e.g., a NG mobility management function, a NG core UP functions, a mobility management entity (MME), serving gateway (S-GW), gNBs).
  • the base station operations module 182 may also generate a RRC reconfiguration message to be signaled to the UE 102.
  • the base station operations module 182 may provide information 103 to the modulator 113.
  • This information 103 may include instructions for the modulator 113.
  • the base station operations module 182 may inform the modulator 113 of a modulation type (e.g., constellation mapping) to be used for transmissions to the UE(s) 102.
  • the modulator 113 may modulate the encoded data 111 to provide one or more modulated signals 115 to the one or more transmitters 117.
  • the base station operations module 182 may provide information 192 to the one or more transmiters 117. This information 192 may include instructions for the one or more transmitters 117.
  • one or more of the elements or parts thereof included in the base station(s) 160 and LTE(s) 102 may be implemented in hardware. F or example, one or more of these elements or parts thereof may be implemented as a chip, circuitry or hardware components, etc. It should also be noted that one or more of the functions or methods described herein may be implemented in and/or performed using hardware. For example, one or more of the methods described herein may be implemented in and/or realized using a chipset, an application-specific integrated circuit (ASIC), a large-scale integrated circuit (LSI) or integrated circuit, etc.
  • ASIC application-specific integrated circuit
  • LSI large-scale integrated circuit
  • a RRC parameter may further include one or more RRC parameter(s).
  • a RRC message may include system information, a RRC message may include one or more RRC parameters.
  • a RRC message may be sent on a broadcast control channel (BCCH) logical channel, a common control channel (CCCH) logical channel or a dedicated control channel (DCCH) logical channel.
  • BCCH broadcast control channel
  • CCCH common control channel
  • DCCH dedicated control channel
  • a description “a UE is configured with or is provided a parameter” also implies the description “the UE may receive, from the base station, an RRC message (or information) which includes the parameter”.
  • the description “a base station configures the UE with or provides the UE the parameter” also implies the description “the base station may transmit, to the UE, an RRC message (or information) which includes the parameter”.
  • Common resource blocks are numbered from 0 and upwards in the frequency domain for subcarrier spacing configuration ⁇ .
  • the center of subcarrier 0 of common resource block with index 0 (i.e. CRB0) for subcarrier spacing configuration ⁇ coincides with point A.
  • the function floor(A) hereinafter is floor operation to output a maximum integer not larger than the A.
  • the RRC parameter offsetToPointA is used for a PCell downlink and represents the frequency offset between point A and the lowest subcarrier of the lowest resource block, which has the subcarrier spacing provided by a higher-layer parameter subCarrierSpacingCommon and overlaps with the SS/PBCH block used by the UE for initial cell selection, expressed in units of resource blocks assuming 15 kHz subcarrier spacing for frequency range (FR) 1 and 60 kHz subcarrier spacing for frequency range (FR2).
  • FR1 corresponds to a frequency range between 410MHz and 7125MHz.
  • FR2 corresponds to a frequency range between 24250MHz and 52600MHz.
  • the information element (IE) SCS-SpecificCarrier provides parameters determining the location and width of the carrier bandwidth or the actual carrier. That is, a carrier (or a carrier bandwidth, or an actual carrier) is determined (identified, or defined) at least by a RRC parameter offsetToCarrier, a RRC parameter subcarrierSpacing, and a RRC parameter carrierBandwidth in the SCS- SpecificCarrier IE.
  • a BWP is a subset of contiguous common resource block for a given subcarrier spacing configuration ⁇ on a given carrier.
  • a BWP can be identified (or defined) at least by a subcarrier spacing ⁇ indicated by the RRC parameter subcarrierSpacing, a cyclic prefix determined by the RRC parameter cyclicPrefix, a frequency domain location, a bandwidth, an BWP index indicated by bwp-Id and so on.
  • the locationAndBandwidth can be used to indicate the frequency domain location and bandwidth of a BWP.
  • AUE 102 configured to operate in BWPs of a serving cell is configured by higher layers for the serving cell a set of at most four BWPs in the downlink for reception. At a given time, a single downlink BWP is active. The bases station 160 may not transmit, to the UE 102, PDSCH and/or PDCCH outside the active downlink BWP.
  • a UE 102 configured to operate in BWPs of a serving cell is configured by higher layers for the serving cell a set of at most four BWPs for transmission. At a given time, a single uplink BWP is active. The UE 102 may not transmit to the base station 160, PUSCH or PUCCH outside the active BWP. The specific signaling (higher layers signaling) for BWP configurations are described later.
  • Figure 3 is a diagram illustrating one example 300 of common resource block grid, carrier configuration and BWP configuration by a UE 102 and a base station 160.
  • a BWP is for a given subcarrier spacing configuration ⁇ .
  • One or more BWPs can be configured for a same subcarrier spacing configuration ⁇ .
  • the first PRB (i.e. PRBO) of a BWP is determined at least by the subcarrier spacing of the BWP, an offset derived by the locationAndBandwidth and an offset indicated by the offsetToCarrier corresponding to the subcarrier spacing of the BWP.
  • a carrier with the defined subcarrier spacing locate in a corresponding CRB grid with the same subcarrier spacing.
  • a BWP with the defined subcarrier spacing locate in a corresponding CRB grid with the same subcarrier spacing as well.
  • a base station may transmit a RRC message including one or more RRC parameters related to BWP configuration to a UE.
  • AUE may receive the RRC message including one or more RRC parameters related to BWP configuration from a base station.
  • the base station may configure at least an initial DL BWP, one initial uplink bandwidth parts (initial UL BWP) and one sidelink BWP to the UE.
  • the base station may configure additional UL and DL BWPs to the UE for a cell.
  • SIB1 which is a cell-specific system information block (SystemlnformationBlock, SIB)
  • SIB1 which is a cell-specific system information block (SystemlnformationBlock, SIB)
  • SIB may contain information relevant when evaluating if a UE is allowed to access a cell and define the scheduling of other system information.
  • SIB 1 may also contain radio resource configuration information that is common for all UEs, and barring information applied to the unified access control.
  • the RRC parameter ServingCellConfigCommon is used to configure cell specific parameters of a UE's serving cell.
  • the RRC parameter ServingCellConfig is used to configure (add or modify) the UE with a serving cell, which may be the SpCell or an SCell of an MCG or SCG.
  • the RRC parameter ServingCellConfig herein are mostly UE specific but partly also cell specific.
  • the base station may configure the UE with a RRC parameter BWP- Downlink and a RRC parameter BWP-Uplink.
  • the RRC parameter BWP-Downlink can be used to configure an additional DL BWP.
  • the RRC parameter BWP-Uplink can be used to configure an additional UL BWP.
  • the base station may transmit the BWP- Downlink and the BWP-Uplink which may be included in RRC parameter ServingCellConfig to the UE.
  • the UE may be configured by the based station, at least one initial BWP and up to 4 additional BWP(s).
  • One of the initial BWP and the configured additional BWP(s) may be activated as an active BWP.
  • the UE may monitor DCI format, and/or receive PDSCH in the active DL BWP.
  • the UE may not monitor DCI format, and/or receive PDSCH in a DL BWP other than the active DL BWP.
  • the UE may transmit PUSCH and/or PUCCH in the active UL BWP.
  • the UE may not transmit PUSCH and/or PUCCH in a BWP other than the active UL BWP.
  • Figure 4 is a diagram illustrating one 400 example of CORESET configuration in a BWP by a UE 102 and a base station 160.
  • Figure 4 illustrates that a UE 102 is configured with three CORESETs for receiving PDCCH transmission in two BWPs.
  • 401 represent point A.
  • 402 is an offset in frequency domain between point A 401 and a lowest usable subcarrier on the carrier 403 in number of CRBs, and the offset 402 is given by the offsetToCarrier in the SCS-SpeciflcCarrier IE.
  • the BWP 405 with index A and the carrier 403 are for a same subcarrier spacing configuration ⁇ .
  • the offset 404 between the lowest CRB of the carrier and the lowest CRB of the BWP in number of RBs is given by the locationAndBandwidth included in the BWP configuration for BWP A.
  • the BWP 407 with index B and the carrier 403 are for a same subcarrier spacing configuration ⁇ .
  • the offset 406 between the lowest CRB of the carrier and the lowest CRB of the BWP in number of RBs is given by the locationAndBandwidth included in the BWP configuration for BWP B.
  • a RRC parameter frequencyDomainResource in respective CORESET configuration indicates the frequency domain resource for respective CORESET.
  • a CORESET is defined in multiples of RB groups and each RB group consists of 6 RBs.
  • the RRC parameter frequencyDomainResource provides a bit string with a fixed size (e.g., 45 bits) as like ‘11010000...000000’ for CORESET#1. That is, the first RB group, the second RB group, and the fourth RB group belong to the frequency domain resource of the CORESET#1.
  • a RRC parameter frequencyDomainResource in the CORESET configuration indicates the frequency domain resource for the CORESET #3.
  • a CORESET is defined in multiples of RB groups and each RB group consists of 6 RBs.
  • the RRC parameter frequencyDomainResource provides a bit string with a fixed size (e.g., 45 bits) as like ‘ 11010000.. .000000’ for CORESET#3. That is, the first RB group, the second RB group, and the fourth RB group belong to the frequency domain resource of the CORESET#3.
  • the bit string configured for CORESET#3 is same as that for CORESET#1, the first RB group of the BWP B is different from that of the BWP A in the carrier. Therefore, the frequency domain resource of the CORESET#3 in the carrier is different from that of the CORESET#1 as well.
  • OCB occupied channel bandwidth
  • NCB nominal channel bandwidth
  • the unlicensed band may be or may be not configured with operation with shared spectrum channel access.
  • the licensed band (licensed spectrum) may be or may be not configured with operation with shared spectrum channel access.
  • the unlicensed band (the unlicensed spectrum) configured with operation with shared spectrum channel access can be termed the unlicensed band A (the unlicensed spectrum A).
  • the unlicensed band (unlicensed spectrum) not configured with operation with shared spectrum channel access can be termed the unlicensed band B (the unlicensed spectrum B).
  • the licensed band (the licensed spectrum) configured with operation with shared spectrum channel access can be termed the licensed band C (the licensed spectrum C).
  • the licensed band (licensed spectrum) not configured with operation with shared spectrum channel access can be termed the licensed band D (the licensed spectrum D).
  • Interlaced transmission i.e., interlace RB-based transmission
  • interlaced transmission was introduced to ensure the compliance with the regulations on OCB and NCB requirements.
  • the interlaced transmission is designed such that each interlace can occupy the channel bandwidth where the occupied channel bandwidth can fulfill the requirement of the OCB.
  • An interlace includes a set of resource blocks that are spread out across the bandwidth of a carrier in the frequency domain.
  • a number of interlaces M is subject to the value of a SCS. That is, the number of interlaces M may be predefined according to a specific SCS. For example, if the SCS is equal to 15kHz, the number of resource block interlaces M is correspondingly equal to 10. If the SCS is equal to 30kHz, the number of resource block interlaces M is correspondingly equal to 5.
  • Figure 5 is adiagram illustrating one example 500 of interlaced transmission and reception in a BWP.
  • each block in the frequency domain refers to a common resource block.
  • the subcarrier spacing is configured as 30kHz and the number of resource block interlaces M are 5.
  • a BWP 501 is determined as illustrated in Figure 3.
  • An interlaced resource block in the BWP is denoted as where the is indexed from 0, 1, ..., in the BWP.
  • the relation between the interlace resource block and interlace m and the common resource block is given by .
  • The is the common resource block where the BWP starts relative to common resource block 0 (i.e., a common resource block with index 0).
  • the BWP 501 starts in a CRB with index 4 relative to the CRB with index 0.
  • a BWP may have a bandwidth of multiple of 20MHz.
  • a sub-band may comprise 20MHz or a multiple of 20MHz bandwidth.
  • a sub-band may also be referred to as a sub-channel, or a channel access bandwidth (e.g., a channel of 20MHz).
  • a BWP may include one or more sub-bands in the frequency domain.
  • a sub-band consists of multiple nonoverlapping RBs.
  • the gNB and/or the UE may first perform channel sensing in each RB set to check whether a channel (or one or more RB sets within the BWP allocated for transmission) is available or not for transmission. If the channel or the allocated RB set(s) is sensed to be considered to be idle (i.e., the channel is available for transmission or the gNB and/or the UE gets a channel access successfully), the gNB and/or the UE may transmit on the channel or on the allocated RB set(s).
  • the gNB and/or the UE may not transmit on the channel or on the allocated RB set(s).
  • Sidelink communication consists of unicast, groupcast and broadcast.
  • the unicast may refer to a communication between two UEs, i.e., one transmitting UE and one receiving UE.
  • the groupcast and/or the broadcast may refer to a communication between one transmitting UE and multiple receiving UEs.
  • NR Sidelink communication supports two sidelink resource allocation modes, mode 1 and mode 2.
  • the difference between the sidelink resource allocation mode 1 and the sidelink resource allocation mode 2 lies in which determine the resource to be used for the sidelink communication.
  • the sidelink resource allocation is provided or determined by the base station and/or the network. That is, for mode 1, the base station may manage the resource allocation for the UEs. For example, a base station may allocate the resources for sidelink communication to an in-coverage UE.
  • dynamic grant configured grant type 1 and configured grant type 2 are supported for PSSCH and PSCCH transmission.
  • the PSSCH transmission is scheduled by a DCI format 3_0.
  • the configured grant is provided (activated) or released (deactivated) by RRC signaling.
  • the configured grant is provided or released by PDCCH with the DCI format 3_0.
  • the sidelink resource allocation is determined by a TX UE itself.
  • the UE may decide the sidelink transmission resources in a resource pool.
  • the UE may carry out the resource allocation without involvement of the base station.
  • These UEs may autonomously determine to select resources for sidelink communication based on a sensing-based procedure.
  • the DCI format 3_0 is used by the base station for scheduling of NR PSCCH and NR PSSCH in one cell.
  • the base station may determine the scheduling information of NR PSCCH and NR PSSCH and provide the scheduling information to an in-coverage UE.
  • the scheduling information may at least include a Resource pool index field, a time gap field, a HARQ process number field, a new data indicator field, a Lowest index of the subchannel allocation to the initial transmission field, SCI format 1-A fields, and so on.
  • the Resource pool index field is used to indicate an index of a resource pool for which the sidelink transmission is scheduled and the SCI format 1-A fields here refer to the frequency resource assignment field and the time resource assignment field.
  • a TX UE may autonomously determine to select resources for sidelink communication and generate the fields in SCI format 1-A to notify an RX UE of the time and frequency resource assignment.
  • the RX UE that received the PSCCH with the SCI format 1 -A can receive the PSSCH in the resource assigned by the TX UE.
  • Sidelink communication supports physical channels such as Physical Sidelink Control Channel (PSCCH), Physical Sidelink Shared Channel (PSSCH), Physical Sidelink Feedback Channel (PSFCH), and Physical Sidelink Broadcast Channel (PSBCH).
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • PSFCH Physical Sidelink Feedback Channel
  • PSBCH Physical Sidelink Broadcast Channel
  • the PSCCH is used for transmitting/receiving sidelink control information (e.g., the 1 st -stage SCI).
  • sidelink control information e.g., the 1 st -stage SCI.
  • the PSCCH indicates resource and other transmission parameters used by a UE for PSSCH reception.
  • PSCCH transmission is associated with a DM-RS.
  • QPSK is supported.
  • Each PSSCH transmission is associated with an PSCCH transmission.
  • a PSCCH transmission carries the 1 st stage of the SCI where the 1 st stage of the SCI may schedule one or more resources for one or more PSSCH transmissions. That is, the one or more PSSCH transmissions are associated with the PSCCH transmission. In other words, the PSCCH transmission (or the 1 st stage of the SCI) may be associated with one or more PSSCH transmissions.
  • the DMRS(s) are associated with PSCCH, PSSCH and/or PSBCH.
  • a transmitting UE may transmit the DMRS within the associated sidelink physical channel.
  • a receiving UE may use the DMRS to estimate and/or decode the associated sidelink physical channel.
  • (pre-)configuration(s) may include configuration(s) of one or more sidelink BWPs for sidelink communication. That is, a UE may receive the configuration(s) of the one or more BWPs included in system information, in dedicated RRC signaling, and/or in a pre-configuration. In the present disclosure, a UE may be provided by the (pre-)configuration(s) a BWP for sidelink transmissions.
  • a SL BWP configuration may include configuration(s) of one or more resource pools for sidelink communication. That is, the configuration(s) of the one or more resource pools (the configuration(s) related to the one or more resource pools) may be received in system information, received in dedicated RRC signaling, and/or preconfigured in a preconfiguration. According to the configuration(s), a resource pool may be indicated to be used either for sidelink communication reception or for sidelink communication transmission. Additionally or alternatively, a resource pool may be indicated to be used for both sidelink communication reception and sidelink communication transmission. Each resource pool is associated with either the sidelink resource allocation Mode 1 or the sidelink resource allocation Mode 2.
  • a UE 102 is provided by a parameter SL-BWP-Config a BWP (a SL BWP) for sidelink transmission with numerology and resource grid.
  • the determination of a SL BWP 601 is similar as how to determine a BWP specified in the Figure 3.
  • Not all the slots within the SL BWP may be assigned to a resource pool within the SL BWP. That is, not all the slots may belong to a resource pool.
  • a slot assigned to a resource pool (or a slot belongs to a resource pool) can be also referred to a slot available for the resource pool.
  • a slot not assigned to a resource pool (or a slot does not belong to a resource pool) can be also referred to a slot unavailable for the resource pool. Therefore, a resource pool may consist of a plurality (set) of non-contiguous slots in the time domain. In a SL BWP, different resource pools may be assigned with different sets of slots.
  • the UE may determine the set of slots assigned to a resource pool according to the (pre-)configurations.
  • a transmitting UE may transmit one or more physical SL channels or one or more SL signals in one or more resource pools within a SL BWP, while a receiving UE may receive one or more physical SL channels or one or more SL signals in one or more resource pools within a SL BWP.
  • slot#0 refers to a first slot of a radio frame corresponding to SFN 0 of the serving cell or DFN 0.
  • a set of slots with indexes #4, #5, #7 and #10 belong to the resource pool.
  • the slots in the set for a resource pool are re-indexed such that the logical slot indexes are successive from 0 to T’ max -1 where the T' max is the number of the slot in the set.
  • the four slots in the set can be re-indexed as slots with logical slot indexes 0, 1, 2, and 3.
  • the slots available for a resource pool may be provided or indicated by a parameter sl- TimeResource and may occur with a periodicity of 10240 ms.
  • SCI carries onPSCCHis the 1 st -stage SCI, which transports sidelink scheduling information. That is, the 1 st - stage SCI is sent on PSCCH.
  • the SCI carries on PSSCH is the 2 nd -stage SCI, which transports sidelink scheduling information, and/or inter-UE coordination related information. That is, the 2 nd - stage SCI is send on PSSCH.
  • NR Releases 16/17 sidelink communication was developed to operate in licensed spectrum.
  • NR Release 18 to further support commercial use cases with increased sidelink data rate, sidelink communication over unlicensed spectrum is under discussion.
  • operation over unlicensed spectrum should fulfill different regulatory limitations and restrictions, e.g., OCB/NCB requirements.
  • Interlaced RB-based transmission should be introduced for sidelink communication over unlicensed spectrum such that the regulatory requirement can be fulfilled.
  • unlicensed spectrum refers to the above-mentioned unlicensed spectrum A, i.e., the shared spectrum.
  • the parameter A may be a common parameter to a plurality of SL resource pools which are configured within a SL BWP. That is, a SL BWP configuration may include the parameter A such that the parameter A is a common indication of which scheme is applied to all the resource pools which are configured in the SL BWP provided by the SL BWP configuration.
  • the number of intra-cell guard can be denoted as N RB-set -1.
  • Each intra-cell guard band is defined by a start common resource block and a size in number of common resource blocks.
  • the start common resource block and the size in number of common resource blocks are provided by parameters, for example, parameters startCRB and nrofCRBs, respectively.
  • the size of a guard band can be configured as 0 RB or non-zero RBs.
  • the intra-cell guard bands may be predefined or predetermined for the carrier with a SCS u.
  • the N RB-set - 1 intra-cell guard bands separate N RB-set RB sets in the carrier with the SCS u. That is, N RB-set is the number of RB sets contained in the SL carrier.
  • the UE may determine, based on the configuration information of the intra-cell guard bands, the frequency location (i.e., a start common resource block index and an end common resource block index) of each RB set.
  • each RB set is defined by a start common resource block and an end common resource block in the frequency domain.
  • An RB set consists of a plurality of contiguous common resource blocks in the frequency domain.
  • the N RB-set RB sets are indexed from 0 to (N RB-set -1) in an ascending order of frequency location, i.e., from lowest frequency location to highest frequency location. That is, if an RB set A has an RB set index lower than RB set B, it implies the RB set A starts with a CRB that has a lower CRB index compared to the starting CRB of the RB set B in the frequency domain. Likewise, it implies the RB set A occupies a bandwidth that has a lower frequency compared to the bandwidth occupied by the RB set B.
  • an RB set may include different numbers of common resource blocks. For example, in a case that subcarrier spacing equals to 15KHz, the number of resource blocks within an RB set may be configured to be between 100 and 110. In a case that subcarrier spacing equals to 30kHz, the number of resource blocks within an RB set may be configured to be between 50 and 55 except for at most one RB set which may contain 56 RBs.
  • the starting position N grid start, ⁇ of the carrier is also the starting position of an RB set with a lowest index among the N RB-set RB sets.
  • the ending position of the carrier is also the ending position of an RB set with a highest index among the N RB-set RB sets.
  • the UE may determine, based on the configuration information of intra-cell guard band for the SL carrier, frequency locations (i.e., starting CRBs and ending CRBs) for the N RB-set RB sets.
  • the intra-cell guard band 703 can be defined by a start CRB and a size in number of CRBs provided by a parameter startCRB and a parameter nrofCRBs, respectively.
  • the parameter startCRB indicates an RB offset relative to the starting CRB of the carrier 701.
  • a CRB index of a starting CRB of an intra-cell guard band is given by its corresponding parameter startCRB and the N grid start, ⁇ of the carrier 701.
  • the parameter startCRB indicates an RB offset as 50.
  • the starting CRB of the intra-cell guard band 703 is determined by the summation of the RB offset and the N grid start, ⁇ , i.e., the starting CRB of the intra-cell guard band 703 is the CRB with index 52.
  • the intra-cell guard band 703 includes 6 CRBs that is provided by the parameter nrofCRBs.
  • the RB sets are indexed in increasing order from 0 to N RB-set -1 from lowest frequency location to highest frequency location.
  • the RB set 704 is indexed with 0, i.e., the RB set 704 refers to the RB set 0 within the carrier 701.
  • the RB set 705 can be indexed with 1, i.e., the RB set 705 refers to the RB set 1 within the carrier 701.
  • the starting position (the starting CRB) of the RB set 704 is the starting position N grid start, ⁇ of the carrier 701.
  • the ending CRB of the RB set 704 is determined based on the starting position N grid start, ⁇ of the carrier 701 and the starting CRB of the guard band 703.
  • the starting CRB of the RB set 705 is determined based on the starting position N grid start, ⁇ of the carrier 701, the starting CRB of the guard band 703, and the size of the the guard band 703 by the parameter nrofCRBs.
  • the ending CRB of the RB set 705 is determined based on the starting position N grid start, ⁇ of the carrier 701 and the size N grid size, ⁇ of the carrier 701.
  • Each CRB on the carrier is mapped to an interlace m where the mapping between CRBs and interlaces are performed cyclically from 0 to M-1 in an order of increasing frequencies of CRBs.
  • CRBs on the carrier are mapped to an interlace cyclically from 0 to 4 in the order of increasing frequencies of the CRBs and starting from the lowest frequency of a CRB.
  • N RB-set BWP is equal to that of N RB-set .
  • the N RB-set BWP RB sets are indexed in increasing order from 0 to N RB-set BWP -1 from lowest frequency location to highest frequency location.
  • SL BWP may also include guard band(s) between any two adjacent RB sets among the RB sets included in the SL BWP.
  • SL resource pool may also include guard band(s) between any two adjacent RB sets among the RB sets included in the SL resource pool.
  • two SL resource pools i.e., a SL resource pool 707 and a SL resource pool 708 are configured in the SL BWP 706.
  • the SL resource pool 707 is configured to include the RB set 704, the RB set 705, and the guard band 703 in the frequency domain.
  • the SL resource pool 708 is configured to include the RB set 705 in the frequency domain. That is, different SL resource pools can be configured with different number of RB sets within a SL BWP, which are depending on configured bandwidths of the resource pools.
  • the resource pool 707 starts in a RPB with index 0 relative to the starting PRB of the SL BWP (i.e., PRB with index 0), while the resource pool 708 starts in a RPB with index 56 relative to the starting PRB of the SL BWP (i.e., PRB with index 0).
  • a SL BWP and/or a resource pool is configured not to include parts of an RB set.
  • a SL BWP and/or a resource pool may be configured to start on an RB with a lowest CRB index within a first RB set and to end an RB with a largest CRB index within a second RB set.
  • the first RB set and the second RB set can refer to a same RB set or different RB sets within the carrier.
  • a starting RB of a SL BWP and/or a SL resource pool is a starting RB of an RB set.
  • an ending (last) RB of a SL BWP and/or a SL resource pool is an ending RB of an RB set.
  • a sub-channel is a minimum resource allocation granularity in frequency domain for PSCCH/PSSCH transmission.
  • different sub-channel structures are designed depending on whether contiguous RB-based PSCCH/PSSCH transmission or interlace RB-based PSCCH/PSSCH transmission is (pre-)configured for the SL BWP.
  • the UE 102 may determine that a sub-channel consists of multiple contiguous PRBs in the frequency domain, while in the above-mentioned second case, the UE 102 may determine that a sub-channel in an RB set includes PRBs of one or more interlaces contained within the RB set.
  • a sub-channel may be associated with one or more interlaces in an RB set. That is, a sub-channel may include PRBs of one or more interlaces contained in an RB set in the frequency domain where the PRBs of one or more interlaces are not contiguous in the frequency domain.
  • An RB set of a resource pool consists of one or more sub-channels in the frequency domain.
  • a resource pool consists of one or more sub-channels in the frequency domain.
  • Figure 8 is a diagram illustrating one example 800 of sub-channel determination in a resource pool.
  • the above-mentioned parameter A which is included in the SL BWP configuration, is set to “a second value”. That is, the contiguous RB-based PSCCH/PSSCH transmission is applied in the resource pool.
  • a PSSCH transmission/reception may be performed in one or more contiguously allocated sub-channels in the frequency domain where each sub-channel consists of multiple contiguous RBs in the frequency domain.
  • the UE may determine frequency location for a resource pool according to parameters included in the SL resource pool configuration. For example, a parameter sl-RB-Number indicates the number of PRBs, APRB, in the resource pool and a parameter sl-StartRB-Subchannel indicates the lowest RB index of the sub-channel with the lowest index in the resource pool with respect to the lowest RB index of the SL BWP. The lowest RB of the sub-channel with the lowest index in the resource pool is also the lowest RB of the resource pool.
  • a parameter sl-RB-Number indicates the number of PRBs, APRB, in the resource pool
  • a parameter sl-StartRB-Subchannel indicates the lowest RB index of the sub-channel with the lowest index in the resource pool with respect to the lowest RB index of the SL BWP.
  • the lowest RB of the sub-channel with the lowest index in the resource pool is also the lowest RB of the resource pool.
  • the parameters sl-RB-Number and sl-StartRB-Subchannel should provide appreciate values such that the lowest RB of the resource pool is aligned with the lowest RB of lowest RB set in the resource pool and the highest RB of the resource pool is aligned with the highest RB of highest RB set in the resource pool.
  • the SL resource pool configuration also includes parameters to indicate, e.g., the number of sub-channels contained in the resource pool and a number of contiguous resource blocks contained in a sub-channel in the resource pool.
  • the parameter sl-NumSubchannel included in the configuration of the resource pool is used to indicate the number of sub-channels, N subchannel SL , that are contained in the resource pool. That is, the resource pool consists of N subchannel SL sub-channels.
  • the parameter sl- SubchannelSize included in the configuration of the resource pool is used to indicate the number of contiguous RBs, K sub , that are contained in a sub-channel. That is, a subchannel consist of K sub contiguous PRBs in the frequency domain.
  • the first RB (i.e., the lowest RB, the start RB) of the first sub-channel (i.e., the sub-channel with the lowest subchannel index, the sub-channel #0) of the resource pool 801 in the SL BWP may be given based on the parameter sl-StartRB-Subchannel.
  • the first RB of the sub-channel with index 0 in the resource pool 801 is aligned with the first RB of the RB set 802.
  • K sub is indicated as 20 resource blocks.
  • the N PRB is not the integer multiple of the K sub
  • the remaining PRBs 805 i.e., the last N PRB mod K sub PRBs in the resource pool
  • each RB of the resource pool is mapped to an RB of an interlace m. Furthermore, each RB within a resource pool is mapped to an interlace.
  • a resource pool may consist of a plurality of interlaces. In the frequency domain, a resource pool is divided into a number of interlaces M where each interlace consists of non-contiguous (common) resource blocks. As above-mentioned, the value of M is determined per SCS.
  • a sub-channel is defined and indexed within 1 RB set within a resource pool. That is, the mapping between sub-channel and interlace(s) is performed in each RB set within a resource pool.
  • a parameter included in the resource pool configuration can be used to indicate the number of K interlaces per sub-channel in the resource pool to UE. That is, a sub-channel consists of K contiguous interlaces within 1 RB set.
  • FIG. 9 is a diagram illustrating one example 900 of sub-channel determination in a resource pool by a UE 102.
  • the SCS of the resource pool is 30kHz and K is indicated as 1, that is, one sub-channel includes 1 interlace within 1 RB set.
  • the above-mentioned parameter A which is included in the SL BWP configuration, is set to “a first value”. That is, the interlace RB-based PSCCH/PSSCH transmission is applied in the resource pool.
  • a PSSCH transmission/reception may be performed in one or more contiguously allocated subchannels where each sub-channel consists of K interlace(s) in the frequency domain.
  • the contiguously allocated sub-channels imply that the sub-channel indexes of the allocated sub-channels are contiguous.
  • the UE may determine, based on a parameter included in the resource pool configuration, that a resource pool includes which RB set(s) contained by the SL BWP.
  • the parameter indicates which RB index(s) of the RB sets contained in the SL BWP to be included in a resource pool.
  • the parameter indicates the RB indexes 0 and 1, which means that the resource pool 901 is configured to include the first RB set 902 of the SL BWP, the second RB set 904, and guard band 903 between these two adjacent RB sets 902 and 904 in the frequency domain.
  • the UE 102 may determine sub-channels for each RB set in the resource pool 901.
  • the sub-channel is indexed per RB set and is periodically indexed across multiple RB sets within the resource pool.
  • the sub-channel with same index is mapped to K interlace(s) with the same index(s) in different RB sets.
  • N subChannel RBset is used to denote the number of subchannels per RB set.
  • the N subChannel RBset sub-channels in an RB set are indexed in increasing order from 0 to N subChannel RBset - 1 wherein the sub-channel #0 is mapped to interlace 0 to (K-1), the sub-channel #1 is mapped to interlaces K to (2*K-1), the subchannel #3 is mapped to interlaces 2*K to (3*K-1), and so on.
  • the number of sub-channels per RB set, N subChannel RBset may be indicated by the above-mentioned parameter sl-NumSub channel.
  • the sub-channels within in the RB set 902 are indexed from 0 to 4.
  • the subchannels within in the RB set 904 are indexed from 0 to 4.
  • a sub-channel is defined within each RB set and does not include resource block in guard band 903.
  • interlace RB-based PSFCH transmission For operation with shared spectrum channel access, whether to use interlace RB-based PSFCH transmission depends on whether OCB requirement is required in a SL BWP. In a case where OCB requirement is required, the interlace RB-based PSFCH transmission can be applied to PSFCH transmission such that the PSFCH transmission can comply with the OCB requirement. On the other hand, in a case where the OCB requirement is not required or the OCB requirement can be exempted, the PSFCH transmission can be performed in one PRB in the frequency domain.
  • the UE may determine, based on whether a parameter (e.g., sl- TransmissionStructureForPSFCH) is included in the resource pool configuration, whether one PSFCH transmission is performed based on interlace transmission or one PSFCH transmission is performed on one PRB. Moreover, for a resource pool which includes multiple RB sets and one or more guard bands, one PSFCH transmission/reception is performed by the UE 102 within an RB set of a resource pool. The UE 102 does not use resource blocks in guard band(s) for the PSFCH transmission/reception.
  • a parameter e.g., sl- TransmissionStructureForPSFCH
  • the UE 102 may determine interlace RB-based transmission is used for the PSFCH transmission in the resource pool. In a case that a resource pool configuration does not include the parameter sl- TransmissionStructureFor PSFCH, the UE 102 may determine that one RB is used for one PSFCH transmission.
  • the configuration of the parameter sl- Tr ansmissionStructureFor PSFCH in a SL resource pool configuration accords with the configuration of the above-mentioned parameter A in a SL BWP configuration.
  • the SL BWP configuration includes information to indicate resource pool configurations on the SL BWP. Specifically, in a case that the above-mentioned parameter A in the SL BWP configuration is set to “the first value” for a SL BWP, a resource pool configuration is (pre-)configured to include the parameter sl- TransmissionStructureForPSFCH. In a case that the above-mentioned parameter A is set to “the second value” for a SL BWP, a resource pool configuration is (pre-)configured not to include the parameter sl-TransmissionStructureForPSFCH.
  • the UE 102 may apply LBT procedure before performing a SL transmission.
  • LBT procedure When LBT procedure is applied, the UE 102 senses the channel to determine whether the channel is free or busy. Specifically, Physical layer may perform an LBT procedure before a SL transmission. In a case that the channel is sensed free, the UE 102 (i.e., the Layer 1 of the UE 102) may perform the SL transmission. On the other hand, in a case that the channel is sensed busy, the UE 102 (i.e., the Layer 1 ofthe UE 102) may not perform the SL transmission.
  • PSFCH occasion hereinafter may refer to either “PSFCH transmission occasion” or “PSFCH reception occasion”.
  • PSFCH occasion hereinafter may refer to “PSFCH transmission occasion”
  • PSFCH occasion hereinafter may refer to “PSFCH reception occasion”.
  • the resource pool can be configured with one or multiple PSFCH occasions provided by the indication (e.g., parameter E). That is, the resource pool configuration may include the indication (e.g., the parameter E) to indicate a number of PSFCH occasions for PSFCH transmission and PSFCH reception.
  • the number of PSFCH occasions can be denoted as
  • the parameter E is used to indicate that one PSCCH/PSSCH transmission has associated candidate PSFCH occasions.
  • the value of can be (pre-) configured as 1, 2, 3, or 4.
  • the UE may determine that there is 1 PSFCH occasions associated with one PSCCH/PSSCH transmission, i.e.,
  • PSFCH occasions may be 1 or more than 1.
  • its associated PSFCH occasions can be indexed from 1 to in ascending order in time.
  • the RX UE may attempt to transmit the PSFCH over a number of first slots that include PSFCH resources.
  • a RX UE may transmit PSFCH with HARQ-ACK information in a first PSFCH occasion among the associated PSFCH occasions in the resource pool. If the RX UE fails to transmit PSFCH in the first PSFCH occasion, the RX UE may attempt to transmit PSFCH in the second PSFCH occasion, and so on. The RX UE attempts to transmit PSFCH in a PSFCH occasion if the RX UE fails to transmit PSFCH in previous PSFCH occasion(s).
  • Figure 10 is a diagram illustrating one example 1000 of determining PSFCH occasions in time domain in a resource pool.
  • the resource pool includes one RB set 1001 in the frequency domain, the value of is configured to 2 in the resource pool, and the number of slots
  • PSFCH resources may be (pre-)configured periodically with a period in the unit of slots within the resource pool wherein the value of is indicated by a parameter (e.g., a parameter sl-PSFCH-Period ) which is included in the resource pool configuration.
  • a parameter e.g., a parameter sl-PSFCH-Period
  • the value of may be indicated as 0, 1, 2 or 4.
  • the UE 102 may determine there is no resource for PSFCH and the PSFCH transmissions (i.e., the HARQ feedbacks for PSSCH transmissions) in the resource pool are disabled.
  • the UE 102 may determine that resources for PSFCH are periodically configured every slot(s) within the resource pool.
  • mapping between PSFCH slot and its associated PSSCH slots are in a PSFCH occasion specific way.
  • its associated ⁇ SSCH slots refer to those slots in which the PSSCHs may be transmitted or received and ra-th PSFCH occasion of the PSSCHs are in the PSFCH slot.
  • its associated PSSCH slots are slot#2, slot #1, slot# 0, and a slot prior to the slot#0 in the resource pool.
  • one PSSCH reception may be associated with 2 PSFCH transmission occasions.
  • the UE may determine time resource of one or multiple PSFCH occasions associated with a PSSCH reception in a slot in the resource pool at least based on one, more or all of the (i) the time location of the PSSCH reception, (ii) the number of slots (i.e., the minimum time gap configured by the SL parameter), (iii) the value of and (iv) the value of
  • Each indication provides a bitmap where leftmost bit of the bitmap refers to the lowest RB index in the resource pool, and so on.
  • the size of bitmap is same as the number of PRBs included in the resource pool.
  • Each bit in the bitmap corresponding to a PRB in the resource pool.
  • Each bit in the bitmap has a one-to-one mapping to each PRB in the resource pool.
  • Value 0 in the bitmap indicates that the corresponding PRB is not used for PSFCH transmission and reception while value 1 indicates that the corresponding PRB is used for PSFCH transmission and reception.
  • the UE may determine, based on the first indication, a set of PRBs 1009 in slot #4 in the resource pool for the first PSFCH occasion of the PSCCH/PSSCH reception 1005, and determine, based on the second indication, a set of PRBs 1008 in slot #8 in the resource pool for the second PSFCH occasion of the PSCCH/PSSCH reception 1005.
  • the UE may determine, based on the first indication, a set of PRBs 1007 in slot #8 in the resource pool for the first PSFCH occasion of the PSCCH/PSSCH reception 1006.
  • sub-channels #0, #1, #2, #3 and #4 includes 20 contiguous resource blocks in the frequency domain.
  • the sub-channel #2 includes 20 contiguous CRBs with indexes from 42 to 61 in the frequency domain. Therefore, in the example 800, the sub-channel #2 overlaps with 2 RB set and the guard band in the frequency domain, while other sub-channels such as sub-channel #0, sub-channel #1, sub-channel #3 and sub-channel #4 overlap with 1 RB set in the frequency domain.
  • the contiguous RB-based PSCCH/PSSCH transmission is applied in the resource pool.
  • One RB-based PSFCH transmission/reception is applied in the resource pool wherein the UE may perform a PSFCH transmission/reception with HARQ-ACK information in a PRB of the resource pool.
  • the resource pool includes N subchannel SL subchannels in the frequency domain wherein each sub-channel consists of K sub contiguous RBs in the frequency domain.
  • the UE may perform frequency resource determination for PSFCH transmission or reception per RB set.
  • the UE may determine a corresponding set of
  • the UE may determine the set of PRBs within the RB set
  • PRBs includes PRBs with indexes 64, 70, 80, 92.
  • the UE may determine, based on the n-th indication, a set of PRBs within the RB set k in the resource pool.
  • the UE may determine the number of sub-channels corresponding to the RB set k.
  • the UE may determine to allocate the PRBs to each sub-channel in each PSSCH slot among the PSSCH slots. That is, the UE may determine specific PRB(s), from the PRBs to each sub-channel in each PSSCH slot among the
  • the UE may determine
  • a determination of whether to assign a sub-channel to an RB set is performed based on whether the sub-channel overlaps with an intra-cell guard band or not. For a sub-channel overlapping with one or multiple RB sets and an intra-cell guard band in the frequency domain, the UE may determine to not assign the sub-channel to an RB set of the one or multiple overlapping RB sets.
  • the UE may determine the sub-channels #0 and #1 as the sub-channels in the RB set 1102 and may not determine the sub-channel #2 to be one of sub-channels in the RB set 1102. Likewise, the UE may determine the subchannels #3 and #4 as the sub-channels in the RB set 1104 and may not determine the sub-channel #2 to be one of sub-channels in the RB set 1104. Consequently, the UE may determine that the number of sub-channels in the RB set 1102 is 2 and the number of A sub-channels in the RB set 1104 is 2.
  • slot C is an PSFCH slots and PSSCH slots (i.e., slot A and slot B) are associated with the PSFCH slot (slot C).
  • the UE may determine that Moreover, the UE may allocate, from the set of PRBs, first 3 PRBs with indexes 0, 1 and 2 to the sub-channel #0 in the slot A, second 3 PRBs with indexes 12, 18 and 19 to the sub-channel #0 in the slot B, third 3 PRBs with indexes 20, 28 and 30 to the sub-channel #1 in the slot A, fourth 3 PRBs with indexes 39, 40 and 41 to the sub-channel #1 in the slot B.
  • the UE may determine a number of sub-channels of the PSSCH transmission in the RB set k.
  • a sub-channel of the PSSCH transmission in the RB set k implies that all PRBs of a allocated sub-channel are included in the RB set k.
  • the sub-channel #2 is not included in the sub-channel in the RB set 1102.
  • the sub-channel #2 is not included in the sub-channel in the RB set 1104. That is, the sub-channel #2 is not included in the second number of the sub-channels.
  • the UE may determine a second number of sub-channels for the PSSCH transmission.
  • the second number of sub-channels includes one or more sub-channels among the first number of sub-channels wherein each of the one or more sub-channels in the second number of sub-channels is within a single RB set. That is, a sub-channel in the second number of sub-channels is within a single RB set. For a sub-channel among the first number of sub-channels, if the sub-channel partially overlaps with a RB set, the sub-channel is determined to be not included in the second number of subchannels.
  • the UE may first determine, for each RB set in the resource pool, a number of PRB(s) (i.e., the S PRB(s)) per RB set where each PRB(s) (i.e., each S PRB(s)) in an RB set k are associated with each sub-channel in a slot for the RB set k.
  • Each PRB(s) (i.e., each S PRB(s)) in an RB set k are available for HARQ- ACK feedback of a PSSCH in each sub-channel in each slot among the PSSCH slots.
  • the UE may determine a number of PRBs for each RB set that includes the resources for the PSSCH transmission.
  • the number of PRBs for an RB set that includes the resources for the PSSCH transmission are the candidate PRB(s) available for the HARQ-ACK feedback of the PSSCH transmission within the RB set.
  • the number of PRBs for the RB set including the resources for the PSSCH transmission is determined by the UE as the number of sub-channels of the PSSCH transmission in the RB set multiplied by the number of PRBs associated with a sub-channel in a slot for the RB set.
  • the number of PRBs in the RB set k is calculated as where the is the number of sub-channels of the PSSCH transmission that is contained in the RB set k and is the number of PRBs associated with a sub-channel in a slot for the RB set k.
  • the PRBs in the RB set k that includes the resources for the PSSCH transmission are associated with the sub-channels of the PSSCH transmission within the RB set k and could be determined based on the above-mentioned PRB allocation rules.
  • Figure 12 illustrates various components that may be utilized in a UE 1202.
  • the UE 1202 (UE 102) described in connection with Figure 12 may be implemented in accordance with the UE 102 described in connection with Figure 1.
  • the UE 1202 includes a processor 1281 that controls operation of the UE 1202.
  • the processor 1281 may also be referred to as a central processing unit (CPU).
  • Memory 1287 which may include read-only memory (ROM), random access memory (RAM), a combination of the two or any type of device that may store information, provides instructions 1283a and data 1285a to the processor 1281.
  • a portion of the memory 1287 may also include non-volatile random access memory (NVRAM).
  • Instructions 1283b and data 1285b may also reside in the processor 1281.
  • the base station 1360 may also include a housing that contains one or more transmitters 1317 and one or more receivers 1378 to allow transmission and reception of data.
  • the transmitter(s) 1317 and receiver(s) 1378 may be combined into one or more transceivers 1376.
  • One or more antennas 1380a- n are attached to the housing and electrically coupled to the transceiver 1376.
  • the various components of the base station 1360 are coupled together by a bus system 1389, which may include a power bus, a control signal bus and a status signal bus, in addition to a data bus. However, for the sake of clarity, the various buses are illustrated in Figure 13 as the bus system 1389.
  • the base station 1360 may also include a digital signal processor (DSP) 1391 for use in processing signals.
  • the base station 1360 may also include a communications interface 1393 that provides user access to the functions of the base station 1360.
  • the base station 1360 illustrated in Figure 13 is a functional block diagram rather than a listing of specific components.
  • the term “computer-readable medium” refers to any available medium that can be accessed by a computer or a processor.
  • one or more of the methods described herein may be implemented in and/or performed using hardware.
  • one or more of the methods described herein may be implemented in and/or realized using circuitry, a chipset, an application-specific integrated circuit (ASIC), a large-scale integrated circuit (LSI) or integrated circuit, etc.
  • ASIC application-specific integrated circuit
  • LSI large-scale integrated circuit

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

Abstract

La présente invention concerne un procédé mis en œuvre par un équipement d'utilisateur (UE). Le procédé consiste à recevoir un PSSCH dans un groupe de ressources de SL, le groupe de ressources de SL étant constitué de multiples ensembles de RB et d'une ou de plusieurs bandes de garde intra-cellule dans le domaine fréquentiel, et le PSSCH se voyant attribuer un premier nombre, N, de sous-canaux; et déterminer des ressources de canal de rétroaction de liaison latérale physique (PSFCH) pour le PSSCH sur la base d'un second nombre, M, de sous-canaux, les M sous-canaux étant sélectionnés parmi les N sous-canaux, et tous les blocs de ressources physiques (PRB) de chacun des M sous-canaux étant contenus dans un seul ensemble de RB.
PCT/JP2025/080052 2024-04-03 2025-04-02 Équipements d'utilisateur et procédés de communication Pending WO2025211462A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2024060042 2024-04-03
JP2024-060042 2024-04-03

Publications (1)

Publication Number Publication Date
WO2025211462A1 true WO2025211462A1 (fr) 2025-10-09

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Country Status (1)

Country Link
WO (1) WO2025211462A1 (fr)

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