[go: up one dir, main page]

WO2025065649A1 - Communication de dispositif à dispositif - Google Patents

Communication de dispositif à dispositif Download PDF

Info

Publication number
WO2025065649A1
WO2025065649A1 PCT/CN2023/122955 CN2023122955W WO2025065649A1 WO 2025065649 A1 WO2025065649 A1 WO 2025065649A1 CN 2023122955 W CN2023122955 W CN 2023122955W WO 2025065649 A1 WO2025065649 A1 WO 2025065649A1
Authority
WO
WIPO (PCT)
Prior art keywords
resource
transmission
wireless device
mac pdu
transmission resource
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/CN2023/122955
Other languages
English (en)
Inventor
Weiqiang DU
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.)
ZTE Corp
Original Assignee
ZTE 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 ZTE Corp filed Critical ZTE Corp
Priority to PCT/CN2023/122955 priority Critical patent/WO2025065649A1/fr
Publication of WO2025065649A1 publication Critical patent/WO2025065649A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup

Definitions

  • This patent document is directed generally to wireless communications.
  • LTE Long-Term Evolution
  • 3GPP 3rd Generation Partnership Project
  • LTE-A LTE Advanced
  • 5G The 5th generation of wireless system, known as 5G, advances the LTE and LTE-A wireless standards and is committed to supporting higher data rates, large number of connections, ultra-low latency, high reliability, and other emerging business needs.
  • Techniques are disclosed for performing device-to-device communications. Techniques are based on selecting transmission resources from multiple consecutive slot transmission (MCST) resources, enabling hybrid automatic repeat request (HARQ) feedbacks, and managing consistent listen-before-talk (C-LBT) failures.
  • MCST consecutive slot transmission
  • HARQ hybrid automatic repeat request
  • C-LBT listen-before-talk
  • a first example wireless communication method includes selecting, by a wireless device, a transmission resource to transmit data associated with a device-to-device communication. The method further includes performing, by the wireless device, the device-to-device communication according to the transmission resource.
  • a second example wireless communication method includes receiving, by a network node, a request for a transmission resource for a device-to-device communication. The method further includes transmitting, by the network node and in response to the request, the transmission resource for a wireless device to transmit data to a peer wireless device.
  • a device that is configured or operable to perform the above-described methods.
  • the device may include a processor configured to implement the above-described methods.
  • the above-described methods are embodied in the form of processor-executable code and stored in a non-transitory computer-readable storage medium.
  • the code included in the computer readable storage medium when executed by a processor, causes the processor to implement the methods described in this patent document.
  • FIG. 1 is a table of channel access priority class (CAPC) values.
  • CAC channel access priority class
  • FIG. 2 is a table of CAPC values for the uplink (UL) .
  • FIG. 3 is a table of time spans that user equipment (UE) requires to process a received channel.
  • UE user equipment
  • FIG. 4 is another table of time spans that UE requires to process a received channel.
  • FIG. 5 is an exemplary multiple consecutive slot transmission (MCST) resource.
  • FIG. 6 is another exemplary MCST resource.
  • FIG. 7 is yet another exemplary MCST resource.
  • FIG. 8 is an exemplary user plane protocol stack.
  • FIG. 9 is an exemplary control plane protocol stack.
  • FIG. 10 is an exemplary sidelink synchronization signal block (S-SSB) .
  • FIG. 11 is an exemplary flowchart for performing a device-to-device communication.
  • FIG. 12 is an exemplary flowchart for transmitting a transmission resource.
  • FIG. 13 illustrates an exemplary block diagram of a hardware platform that may be a part of a network node or a wireless device.
  • FIG. 14 illustrates exemplary wireless communication including a Base Station (BS) and User Equipment (UE) based on some implementations of the disclosed technology.
  • BS Base Station
  • UE User Equipment
  • the present patent document describes how wireless device selects the resource when wireless communication is performed on the unlicensed carrier (e.g., shared spectrum) .
  • the unlicensed carrier e.g., shared spectrum
  • D2D device-to-device
  • the application of D2D technology can reduce the burden of cellular networks, reduce battery power consumption of user equipment (UE) , increase data rate, and improve the robustness of network infrastructure, thus meeting the above-mentioned requirements of high data rate services and proximity services.
  • D2D technology is also referred to as Proximity Services (ProSe) , unilateral/sidechain/SL communication, and so on.
  • Devices using sidelink communication support two resource modes, mode1 and mode2.
  • mode1 user equipment (UE) uses the resource scheduled by network to transmit sidelink data.
  • UE uses the resource scheduled by network to transmit sidelink data.
  • mode2 UE selects the transmission resource by itself to transmit sidelink data.
  • the wireless communications are performed on carriers or frequency bands.
  • Some carriers are licensed carriers, which are carriers licensed by a governmental or other authority to a service provider for an exclusive use.
  • other carriers are unlicensed carriers, which are carriers not licensed by such governmental or other authorities.
  • the user terminal devices may be able to communicate directly with each other (i.e., without use of a base station) on the licensed carriers.
  • ways for the user terminal devices to communicate directly with each other on unlicensed carriers may be desirable.
  • a licensed carrier is a carrier, frequency band or spectrum that is licensed by a government or other authority (e.g., the Federal Communications Commission (FCC) in the United States or the European Telecommunications Standards Institute (ETSI) in Europe) to a service provider for exclusive use.
  • An unlicensed carrier also called a shared spectrum, is a carrier, frequency band or spectrum that is not licensed by a government or other authority.
  • the user device when a user device performs data transmission on an unlicensed carrier, the user device performs a channel access scheme called LBT (listen before talk) first. During the LBT procedure, the user device monitors the channel for an amount of time. In an event that the result of the LBT procedure is a success, the user device can occupy the channel for an amount of time called COT (channel occupy time) .
  • LBT listen before talk
  • the user device can share the COT to another user device.
  • the user device can also use the COT shared by another UE to perform channel access.
  • T ulm cot, p 6ms, it may be increased to 8ms by inserting one or more gaps.
  • the minimum duration of a gap shall be 100us.
  • the maximum duration before including any such gap shall be 6ms.
  • a user device uses sidelink resource allocation mode2 to transmit data.
  • the mode2 includes multiple mechanisms: full sensing only, partial sensing only, random resource selection only, or any combination (s) .
  • the user device can:
  • Step1 select the data transmission parameter including at least one of: Hybrid Automatic Repeat Request (HARQ) retransmission number, resource reselection counter value, transmission period, the resource reservation interval, an amount of frequency resources, packet delay budget, the number of sub-channels to be used for the Physical Sidelink Shared Channel (PSSCH) /Physical Sidelink Control Channel (PSCCH) transmission, resource pool.
  • HARQ Hybrid Automatic Repeat Request
  • PSSCH Physical Sidelink Shared Channel
  • PSCCH Physical Sidelink Control Channel
  • Step2 use the selected data transmission parameter to determine the candidate resource set.
  • Step3 select the initial transmission from the determined candidate resource set.
  • Step4 if needed, select multiple re-transmission resource from the determined candidate resource set for the selected initial transmission resource in step3, the number of re-transmission resource depends on the selected HARQ re-transmission number.
  • Step5 if needed, select period transmission resource from the determined candidate resource set. The period depends on the resource reservation interval.
  • the first embodiment describes consistent listen-before-talk (C-LBT) failure recovery.
  • the second embodiment describes HARQ feedback due to multiple consecutive slot transmission (MCST) .
  • the third embodiment describes selecting resources for MAC packet data units (PDUs) in a HARQ buffer.
  • the fourth embodiment describes MCST transmission.
  • the fifth embodiment describes a new carrier list used for UE reporting more than one carrier.
  • the sixth embodiment describes protocol stacks for the user plane and control plane.
  • the seventh embodiment describes Sidelink Synchronisation Signal Block (S-SSB) .
  • S-SSB Sidelink Synchronisation Signal Block
  • a first wireless device performs a device-to-device communication with a second wireless device.
  • the second wireless device performs a device-to-device communication with the first wireless device.
  • the C-LBT failure is detected or triggered by the first wireless device.
  • the first wireless device considers the C-LBT failure is recovered, or the first wireless device cancels the triggered C-LBT failure.
  • the UE performing device-to-device communication on unlicensed carriers needs to perform LBT before data transmission. Only if the LBT is successful, the UE can perform data transmission. It is possible that the UE detects consistent LBT (C-LBT) failure (e.g., the number of consecutive LBT failures reaches a maximum value) , in which case, the UE considers the C-LBT failure is detected. If the C-LBT failure is detected (e.g., the C-LBT failure is triggered) , and the associated bandwidth part (BWP) is deactivated, the UE cancels the triggered C-LBT failure.
  • C-LBT consistent LBT
  • BWP bandwidth part
  • the possible C-LBT detection procedure can be as follows:
  • the media access control (MAC) entity shall:
  • PSSCH physical sidelink shared channel
  • the higher layer can request the UE to determine a subset of resources from which the higher layer will select resources for PSSCH/PSCCH transmission. To trigger this procedure, in slot n, the higher layer provides the following parameters for this PSSCH/PSCCH transmission:
  • the resource reservation interval, P rsvp_TX in units of msec.
  • the higher layer if the higher layer requests the UE to determine a subset of resources from which the higher layer will select resources for PSSCH/PSCCH transmission as part of re-evaluation or pre-emption procedure, the higher layer provides a set of resources (r 0 , r 1 , r 2 , ...) which may be subject to re-evaluation and a set of resources (r′ 0 , r′ 1 , r′ 2 , ...) which may be subject to pre-emption.
  • r" i is the slot with the smallest slot index among (r 0 , r 1 , r 2 , ...) and (r′ 0 , r′ 1 , r′ 2 , ...)
  • T 3 is equal to where is defined in slots in FIG. 4 where ⁇ SL is the SCS configuration of the SL BWP.
  • FIG. 4 shows depending on sub-carrier spacing.
  • the indication of resource selection mechanism (s) as sl-AllowedResourceSelectionConfig, which may include full sensing only, partial sensing only, random resource selection only, or any combination (s) thereof.
  • sl-SelectionWindowList internal parameter T 2min is set to the corresponding value from higher layer parameter sl-SelectionWindowList for the given value of prio TX .
  • sl-RS-ForSensing selects if the UE uses the PSSCH-RSRP or PSCCH-RSRP measurement, as defined in clause 8.4.2.1.
  • sl-SensingWindow internal parameter T 0 is defined as the number of slots corresponding to sl-SensingWindow msec.
  • sl-TxPercentageList internal parameter X for a given prio TX is defined as sl-TxPercentageList (prio TX ) converted from percentage to ratio.
  • sl-PreemptionEnable if sl-PreemptionEnable is provided, and if it is not equal to “enabled, ” internal parameter prio pre is set to the higher layer provided parameter sl-PreemptionEnable.
  • minimum number of Y slots as Y min (sl-MinNumCandidateSlotsPeriodic) , which indicates the minimum number of Y slots that are included in the candidate resources corresponding to periodic-based partial sensing and contiguous partial sensing for resource (re) selection triggered by periodic transmission (P rsvp_TX ⁇ 0) .
  • sensing occasion as sl-PBPS-OccasionReservePeriodList, which indicates the subset of periodicity values from sl-ResourceReservePeriodList used to determine periodic sensing occasions in periodic-based partial sensing. If not configured, all periodicity values from sl-ResourceReservePeriodList are used to determine periodic sensing occasions in periodic-based partial sensing.
  • additional sensing occasions as sl-Additional-PBPS-Occasion, which indicates that UE additionally monitors periodic sensing occasions that correspond to a set of values.
  • the possible values of the set at least include the most recent sensing occasion before the first slot of the candidate slots for a given reservation periodicity and the last periodic sensing occasion prior to the most recent one for the given reservation periodicity. If not (pre-) configured, the UE monitors the most recent sensing occasion before the first slot of the candidate slots for the given periodicity used to determine periodic sensing occasions in periodic-based partial sensing.
  • indication of the size in logical slots of contiguous partial sensing window for periodic transmissions as defined by the parameter sl-CPS-WindowPeriodic.
  • indication of whether UE is required to perform SL reception of PSCCH and RSRP measurement for partial sensing on slots in SL DRX inactive time as sl-PartialSensingInactiveTime.
  • the resource reservation interval, P rsvp_TX if provided, is converted from units of msec to units of logical slots, resulting in P′ rsvp_TX according to clause 8.1.7.
  • the UE When the resource pool is (pre-) configured with sl-AllowedResourceSelectionConfig including full sensing, and full sensing is configured in the UE by higher layers, the UE performs full sensing.
  • the resource pool is (pre-) configured with sl-AllowedResourceSelectionConfig including partial sensing, and partial sensing is configured by higher layer, the UE performs periodic-based partial sensing, unless other conditions state otherwise in the specification.
  • the resource pool is (pre-) configured with sl-AllowedResourceSelectionConfig including partial sensing, and partial sensing is configured by higher layer, the UE performs contiguous partial sensing, unless stated otherwise in the specification.
  • the UE shall assume that any set of L subCH contiguous sub-channels included in the corresponding resource pool within the time interval [n+T 1 , n+T 2 ] correspond to one candidate single-slot resource for UE performing full sensing, in a set of Y candidate slots within the time interval [n+T 1 , n+T 2 ] correspond to one candidate single-slot resource for UE performing periodic-based partial sensing together with contiguous partial sensing and resource (re) selection triggered by periodic transmission (P rsvp_TX ⁇ 0) , or in a set of Y'candidate slots within the time interval [n+T 1 , n+T 2 ] correspond to one candidate single-slot resource for UE performing at least contiguous
  • T 1 selection of T 1 is up to UE implementation under where is defined in slots in FIG. 4 where ⁇ SL is the SCS configuration of the SL BWP;
  • T 2min is shorter than the remaining packet delay budget (in slots) then T 2 is up to UE implementation subject to T 2min ⁇ T 2 ⁇ remaining packet delay budget (in slots) ; otherwise T 2 is set to the remaining packet delay budget (in slots) .
  • Y is selected by UE where Y ⁇ Y min .
  • Y′ is selected by UE where Y′ ⁇ Y′ min .
  • the total number of candidate single-slot resources is denoted by M total .
  • the sensing window is defined by the range of slots when the UE performs full sensing, where T 0 is defined above and is defined in slots in FIG. 3 where ⁇ SL is the SCS configuration of the SL BWP.
  • FIG. 3 shows depending on sub-carrier spacing.
  • the UE shall monitor slots which belongs to a sidelink resource pool within the sensing window except for those in which its own transmissions occur.
  • the UE shall perform the behavior in the following steps based on PSCCH decoded and RSRP measured in these slots.
  • the UE When the UE performs periodic-based partial sensing, the UE shall monitor slots at where is a slot of the selected candidate slots and P′ reserve is P reserve converted to units of logical slot according to clause 8.1.7. The UE shall perform the behavior in the following steps based on PSCCH decoded and RSRP measured in these slots.
  • P reserve corresponds to sl-PBPS-OccasionReservePeriodList if (pre-) configured, otherwise, the values correspond to all periodicity from sl-ResourceReservePeriodList.
  • the UE monitors k sensing occasions determined by sl-Additional-PBPS-Occasion, as previously described, and not earlier than n–T 0 .
  • the values of k correspond to the most recent sensing occasion earlier than if sl-Additional-PBPS-Occasion is not (pre-) configured, and additionally includes the value of k corresponding to the last periodic sensing occasion prior to the most recent one if sl-Additional-PBPS-Occasion is (pre-) configured. is the first slot of the selected Y candidate slots of PBPS.
  • the contiguous partial sensing window is defined by the range of slots [n+T A , n+T B ] .
  • n+T A is M consecutive logical slots earlier than slot and n+T B is slots earlier than where is the first slot of the selected Y candidate slots of PBPS, and are in units of physical time/slots.
  • the value of M is (pre-) configured with the sl-CPS-WindowPeriodic. If sl-CPS-WindowPeriodic is not (pre-) configured, M equals to 31.
  • the contiguous partial sensing window is defined by the range of slots [n+T A , n+T B ] .
  • T A and T B are both selected such that the UE has sensing results starting at least M consecutive logical slots before and ending at slots earlier than where is the first slot of the selected Y′candidate slots.
  • the value of M is (pre-) configured with the sl-CPS-WindowAperiodic. If sl-CPS-WindowAperiodic is not (pre-) configured, M equals to 31.
  • Whether the UE is required to performs SL reception of PSCCH and RSRP measurement for partial sensing on slots in SL DRX inactive time is enabled/disabled by higher layer parameter sl-PartialSensingInactiveTime.
  • UE performs periodic-based partial sensing on the slots in SL DRX inactive time for a given periodicity corresponding to P reserve , UE monitors only the default periodic sensing occasions (most recent sensing occasion) from the slots; if UE performs contiguous partial sensing on the slots in SL DRX inactive time, UE monitors a minimum of M slots from the slots.
  • the set S A is initialized to the set of all the candidate single-slot resources.
  • the UE shall exclude any candidate single-slot resource R x, y from the set S A if it meets all the following conditions:
  • Step 2 the UE has not monitored slot in Step 2.
  • condition c in step 6 would be met.
  • the UE shall exclude any candidate single-slot resource R x, y from the set S A if it meets all the following conditions:
  • the UE receives an SCI format 1-A in slot and 'Resource reservation period'field, if present, and 'Priority'field in the received SCI format 1-A indicate the values P rsvp_RX and prio RX , respectively according to Clause 16.4 in [6, TS 38.213] ;
  • slot is the last slot of the Y or Y′ candidate slots.
  • the slot is the first slot of the selected/remaining set of Y or Y′ candidate slots.
  • Th (p i , p j ) is increased by 3 dB for each priority value Th (p i , p j ) and the procedure continues with step 4.
  • the UE based on its implementation additionally selects and includes at least one candidate single-slot resources within the sidelink DRX active time in the set S A .
  • the UE shall report set S A to higher layers.
  • the UE shall report re-evaluation of the resource r i to higher layers.
  • a resource r′ i from the set (r′ 0 , r′ 1 , r′ 2 , ...) meets the conditions below then the UE shall report pre-emption of the resource r′ i to higher layers.
  • r′ i is not a member of S A .
  • r′ i meets the conditions for exclusion in step 6, with Tp (prio RX , prio TX ) set to the final threshold after executing steps 1) -7) , i.e., including all necessary increments for reaching X ⁇ M total , and
  • the associated priority prio RX satisfies one of the following conditions:
  • sl-PreemptionEnable is provided and is equal to 'enabled'a nd prio TX >prio RX ;
  • sl-PreemptionEnable is provided and is not equal to 'enabled', and prio RX ⁇ prio pre and prio TX >prio RX .
  • candidate resource set (S A ) is initialized to the remaining Y candidate slots starting from slot and ending at the last slot of the Y candidate slots, where the slot indices of the remaining Y candidate slots are equal to where is a slot index of Y candidate slots used in the initial resource (re) selection.
  • the UE performs PBPS for the remaining Y candidate slots according to where is a slot belonging to the remaining Y candidate slots, and k and P reserve are the same as resource (re) selection, where the values of k correspond to the most recent sensing occasion earlier than if sl-Additional-PBPS-Occasion is not (pre-) configured, and additionally includes the value of k corresponding to the last periodic sensing occasion prior to the most recent one if sl-Additional-PBPS-Occasion is (pre-) configured.
  • the UE performs CPS starting from M logical slots earlier than to slots earlier than
  • M is 31 unless (pre-) configured with another value by sl-CPS-WindowPeriodic.
  • Candidate resource set (S A ) is initialized to the remaining Y'candidate slots starting from slot and ending at the last slot of the Y'candidate slots, where is the first candidate slot starting from slot n+T 3 .
  • UE may perform PBPS for periodic sensing occasions after the resource (re) selection when higher layer parameter sl-MultiReserveResource is enabled.
  • UE performs CPS starting from at least M consecutive logical slots earlier than to slots earlier than
  • M is 31 unless (pre-) configured with another value, by sl-CPS-WindowAperiodic.
  • UE senses in all available slots starting from the resource (re) selection trigger slot of the same TB to slots earlier than The UE re-evaluation and pre-emption checking is based on all available sensing results after n–T 0 .
  • PSFCH physical sidelink feedback channel
  • UE selects the time and frequency resource for one transmission opportunity from the resources indicated by the physical layer, according to the amount of selected frequency resources and the remaining PDB of SL data available in the logical channel (s) .
  • This resource is considered as the initial transmission resource.
  • the UE randomly selects the time and frequency resources for one or more transmission opportunities from the available resources, according to the amount of selected frequency resources, the selected number of HARQ retransmissions and the remaining PDB of SL data available in the logical channel (s) . These resources are considered as re-transmission resources.
  • UE will generate a MAC PDU.
  • UE will perform preemption or re-evaluation or conflict detection. If the resource for the MAC PDU is not used but indicated for preemption or re-evaluation or conflict, UE should drop the corresponding resource. If the MAC PDU is still available in the HARQ buffer, UE may re-select a resource as the re-transmission of the MAC PDU.
  • UE will select the transmission resource for the MAC PDU in HARQ buffer if at least one of following is detected:
  • the resource used for transmitting the MAC PDU is indicated for re-evaluation.
  • the resource used for transmitting the MAC PDU is indicated for preemption.
  • the resource used for transmitting the MAC PDU is conflicted resource indicated by peer UE.
  • the conflicted resource can be indicated via PSFCH.
  • the UE may select a multiple consecutive slot transmission (MCST) resource having one or more transmission slots.
  • MCST multiple consecutive slot transmission
  • FIG. 5 shows four slots of a MCST resource.
  • the slots can be time/frequency resource elements.
  • each slot within the MCST resource is for initial transmission.
  • each slot within the MCST resource is for re-transmission.
  • transmission resources 1, 2, 3, 4 is for initial transmission
  • transmission resources 5, 6, 7, 8 is for re-transmission.
  • a second MCST resource is selected for re-transmission of a first MCST resource.
  • the first slot in second MCST resource is for re-transmission of first slot within first MCST.
  • the second slot in second MCST resource is for re-transmission of second slot within first MCST, and so on.
  • the association between initial transmission slot and re-transmission slot depends on the initial slot state.
  • the first slot in second MCST resource is for re-transmission of first slot on which the re-transmission is required within first MCST.
  • the second slot on which the re-transmission is required in second MCST resource is for re-transmission of second slot within first MCST.
  • the UE once the UE selects a MCST resource, it will use all the single-slot resources of the MCST resource.
  • the selected MCST resource is for transmission of single MAC PDU or TB.
  • the HARQ attribute of the MAC PDU is HARQ enabled.
  • UE will flush/clear the HARQ buffer and flush the following re-transmission resource if HARQ acknowledgement (ACK) /positive acknowledgement is received from peer UE.
  • ACK HARQ acknowledgement
  • transmission resources 1, 3, 5, 7 is for PSSCH resource
  • transmission resources 2, 4, 6, 8 is corresponding HARQ feedback resource (Physical Sidelink Feedback Channel (PSFCH) resource) .
  • PSFCH Physical Sidelink Feedback Channel
  • 1, 3, 5, 7 is for transmission of single TB, if UE receives positively acknowledgement on 2 after transmitting MAC PDU on 1, the transmission resource 3, 5, 7 will be flushed.
  • the corresponding resource and HARQ buffer shall not be flushed or cleared. After all transmissions using resources within the MCST resource is done, UE can determine whether the HARQ buffer needs to be flushed according to the HARQ feedback state.
  • UE flush the HARQ buffer if at least one of following is met:
  • the transmission resource is the last resource within a MCST resource and if positive acknowledgement was received by using at least one transmission resource within MCST resource.
  • 1, 2, 3, 4 is one MCST resource
  • the HARQ feedback of 1, 2, 3, 4 is ACK, as long as one transmission within MCST is HARQ ACK, the transmission is successful.
  • UE clears the transmission resource of the MAC PDU from the selected resource (i.e., clear the PSCCH duration (s) and PSSCH duration (s) corresponding to retransmission (s) of the MAC PDU) if at least one of following is received:
  • UE clears the transmission resource (e.g., clear the PSCCH duration (s) and PSSCH duration (s) corresponding to retransmission (s) of the MAC PDU from the selected sidelink grant) if at least one of following is met:
  • the transmission resource is the resource within a MCST resource and if positive acknowledgement to this transmission of the MAC PDU is received by using at least one transmission resource within MCST.
  • 1, 2, 3, 4 is one MCST resource
  • the HARQ feedback of 1, 2, 3, 4 is ACK, NACK, NACK, NACK, as long as one transmission within MCST is HARQ ACK (i.e., HARQ feedback of 1 is ACK) , the transmission is successful.
  • the transmission resource is the resource within a MCST resource and if no negative acknowledgement was received for this transmission of the MAC PDU by using at least one transmission resource within MCST.
  • UE selects the resource pool without PSFCH resource when MCST is determined to be used.
  • the UE can operate in two modes for resource allocation in sidelink:
  • Scheduled resource allocation (mode1) , characterized by:
  • the UE needs to be RRC_CONNECTED in order to transmit data
  • NG-RAN schedules transmission resources.
  • UE autonomous resource selection (mode2) , characterized by:
  • the UE can transmit data when inside NG-RAN coverage, irrespective of which RRC state the UE is in, and when outside NG-RAN coverage;
  • the UE autonomously selects transmission resources from resource pool (s) .
  • the UE For NR sidelink communications, the UE performs sidelink transmissions only on a single carrier.
  • R16/R17 sidelink UE only one carrier can be used.
  • One carrier list for single carrier operation is configured.
  • sidelink CA carrier aggregation
  • WID Wireless Interface Device
  • “sidelink CA only supports mode2” does not mean that UE reporting more than one carrier can only be configured with mode2.
  • DCI can only schedule the carrier included in SIB12.
  • DCI includes a carrier indication, and two non-overlapped carrier list is configured to LTE SL UE for mode3 scheduling.
  • per LCH allowed carrier list is configured.
  • Method 1 UE is configured with an allowed carrier list as LTE V2X for mode1 scheduling.
  • the allowed carrier list can include only one carrier.
  • the carrier included in this allowed carrier list is for mode1 scheduling.
  • Method 2 carrier included in legacy carrier list (i.e., the carrier list for single carrier operation) is for mode1 scheduling.
  • the carrier list used for R16/R17 single carrier operation is used for mode1 scheduling.
  • Method 3 one specific carrier included in new carrier list (i.e., the carrier list for multiple carrier operation) is for mode1 scheduling.
  • the first carrier or last carrier in carrier list is for mode1 scheduling.
  • Method 4 network send which carrier is used for mode1 scheduling to UE explicitly.
  • FIG. 8 shows user plane protocol stack for L2 UE-to-Network Relay.
  • FIG. 9 shows control plane protocol stack for L2 UE-to-Network Relay.
  • SRAP Sidelink Relay Adaptation Protocol
  • the Uu Service Data Adaptation Protocol (SDAP) , Packet Data Convergence Protocol (PDCP) and radio resource control (RRC) are terminated between L2 U2N Remote UE and gNB (e.g., network) , while SRAP, radio link control (RLC) , medium access control (MAC) and physical (PHY) are terminated in each hop (i.e., the link between L2 U2N Remote UE and the L2 U2N Relay UE and the link between L2 U2N Relay UE and the gNB) .
  • SDAP Secure Data Adaptation Protocol
  • PDCP Packet Data Convergence Protocol
  • RRC radio resource control
  • SRAP radio link control
  • RLC radio link control
  • MAC medium access control
  • PHY physical
  • the SRAP sublayer over PC5 hop is only for the purpose of bearer mapping.
  • the SRAP sublayer is not present over PC5 hop for relaying the L2 U2N Remote UE’s message on BCCH and PCCH.
  • the SRAP header is not present over PC5 hop, but the SRAP header is present over Uu hop for both DL and UL.
  • remote UE may select a relay UE in RRC IDLE/INACTIVE state, to trigger relay UE to enter into RRC connected state, and remote UE may send a message including PC5 RLC channel configuration to relay UE.
  • the PC5 RLC channel configuration is used for configuring the PC5 RLC channel used for remote UE’s data forwarding.
  • the PC5 RLC channel is an RLC channel between Remote UE and Relay UE, which is used to transport packets for UE-to-Network relay.
  • the remote UE Upon receiving the message including PC5 RLC channel configuration, the remote UE initiate RRC connection with network.
  • UE can select another UE called SyncRef UE as synchronization reference source, and UE receives the synchronization reference signal (e.g., SLSS-Sidelink Synchronisation Signal or S-SSB, SL Synchronization Signal Block) from the SyncRef UE.
  • the synchronization reference signal e.g., SLSS-Sidelink Synchronisation Signal or S-SSB, SL Synchronization Signal Block
  • S-SSB SL Synchronization Signal Block
  • L1 is the number of occasions containing sidelink synchronization reference signal of the Synchronization Reference (SyncRef) not available at the UE during T evaluate, SLSS_CCA due to the clear channel assessment (CCA) failures.
  • CCA is LBT.
  • FIG. 10 shows an example for R16/R17 S-SSB occasion and its corresponding additional candidate S-SSB occasion (s) .
  • L1 is increased by 1 if and only if the SyncRef UE is not available on a R16/R17 S-SSB occasion. For example, if SyncRef UE is not available on 1, then L1 is increased by 1 directly irrespective of whether SyncRef UE is available on 1a or 1b.
  • L1 is increased by 1 if the SyncRef UE is not available on any S-SSB occasion, i.e., taking both R16/R17 S-SSB occasions and R18 additional candidate S-SSB occasions into account. For example, if SyncRef UE is not available on 1 and 1a, but available on 1b, then L1 is increased by 2.
  • L1 is increased by 1 if the SyncRef UE is not available on a R16/R17 S-SSB occasion and its K corresponding additional candidate S-SSB occasion (s) . For example, if SyncRef UE is not available on 1 and 1a, but available on 1b, then L1 is not increased. If SyncRef UE is not available on both 1 , 1a, and 1b, then L1 is increased by 1.
  • the UE upon L1 reach or exceed the maximum value, performs at least one of following:
  • Method 1 cease SLSS transmissions.
  • Method 2 initiate SLSS transmissions. E. g., perform synchronization reference source procedure and sends the SLSS according to the selected synchronization reference source.
  • UE considers the SyncRef UE is available if UE can detect at least K S-SSB occasion during the last y millisecond.
  • UE considers the SyncRef UE is available if UE can detect at least K SLSS signal during the last y millisecond.
  • the UE upon L1 not reaching or exceeding the maximum value, the UE keeps sending SLSS transmission.
  • SyncRef UE if SyncRef UE is not available on any one S-SSB occasion, the UE initiate a new SLSS transmission.
  • FIG. 11 is an exemplary flowchart for performing a device-to-device communication.
  • Operation 1102 includes selecting, by a wireless device, a transmission resource to transmit data associated with a device-to-device communication.
  • Operation 1104 includes performing, by the wireless device, the device-to-device communication according to the transmission resource.
  • the method can be implemented according to Embodiments 1-7. In some embodiments, performing further steps of the method can be based on a better system performance than a legacy protocol.
  • the method further includes detecting, by the wireless device, in a duration of the device-to-device communication, a consistent listen-before-talk (C-LBT) failure.
  • the method further includes determining, by the wireless device, that a bandwidth part (BWP) associated with the device-to-device communication is deactivated.
  • the method further includes canceling, by the wireless device, the C-LBT failure.
  • C-LBT listen-before-talk
  • the method further includes receiving, by the wireless device, sidelink control information (SCI) enabling a hybrid automatic repeat request (HARQ) feedback, where the SCI indicates a negative-only acknowledgement, and where the wireless device is within a licensed carrier or is not within an unlicensed carrier.
  • SCI sidelink control information
  • HARQ hybrid automatic repeat request
  • the method further includes instructing, by the wireless device, a physical layer to generate a negative acknowledgement for data in a transport block (TB) associated with the device-to-device communication, where the data in the TB was not decoded successfully by an attempt of a media access control (MAC) entity, and where the data in the TB was not decoded successfully before the attempt.
  • a transport block associated with the device-to-device communication
  • MAC media access control
  • the method further includes determining, by the wireless device, that a media access control (MAC) packet data unit (PDU) is available in a hybrid automatic repeat request (HARQ) buffer and selecting, by the wireless device, a transmission resource for the MAC PDU available in the HARQ buffer if at least one of the following is detected: the transmission resource for the MAC PDU is indicated for pre-emption; the transmission resource for the MAC PDU is indicated for re-evaluation; the transmission resource for the MAC PDU is a conflicted resource indicated by a peer wireless device; or the transmission resource for the MAC PDU is where the C-LBT failure is detected.
  • MAC media access control
  • PDU packet data unit
  • HARQ hybrid automatic repeat request
  • the method further includes flushing, by the wireless device, a hybrid automatic repeat request (HARQ) buffer if at least one of the following is met: if a positive acknowledgement for a transmission of a media access control (MAC) packet data unit (PDU) is received and if a transmission resource associated with the transmission of the MAC PDU is not within a multiple consecutive slot transmission (MCST) resource; if a positive acknowledgement for a transmission of a MAC PDU is received and if a transmission resource associated with the transmission of the MAC PDU is a last resource within a MCST resource; if a positive acknowledgement for at least one transmission resource within a MCST resource is received; if a negative-only acknowledgement is enabled in sidelink control information (SCI) and no negative acknowledgement is received for a transmission of a MAC PDU, and if a transmission resource associated with the transmission of the MAC PDU is not within a MCST resource; if a negative-only acknowledgement is enabled in SCI and no
  • the method further includes clearing, by the wireless device and from a selected resource, a transmission resource for a media access control (MAC) packet data unit (PDU) if a selected sidelink grant is available for a retransmission of the MAC PDU that has been positively acknowledged.
  • the method further includes clearing, by the wireless device and from the selected sidelink grant, a physical sidelink control channel (PSCCH) duration and a physical sidelink shared channel (PSSCH) duration corresponding to the retransmission of the MAC PDU.
  • PSCCH physical sidelink control channel
  • PSSCH physical sidelink shared channel
  • FIG. 12 is an exemplary flowchart for transmitting a transmission resource.
  • Operation 1202 includes receiving, by a network node, a request for a transmission resource for a device-to-device communication.
  • Operation 1204 includes transmitting, by the network node and in response to the request, the transmission resource for a wireless device to transmit data to a peer wireless device.
  • the method can be implemented according to Embodiments 1-7. In some embodiments, performing further steps of the method can be based on a better system performance than a legacy protocol.
  • the method further includes transmitting, by the network node, sidelink control information (SCI) enabling a hybrid automatic repeat request (HARQ) feedback, where the SCI indicates a negative-only acknowledgement, and where the wireless device is within a licensed carrier or is not within an unlicensed carrier.
  • SCI sidelink control information
  • HARQ hybrid automatic repeat request
  • the method further includes transmitting, by the network node, a negative acknowledgement for data in a transport block (TB) associated with the device-to-device communication, where the data in the TB was not decoded successfully by an attempt of a media access control (MAC) entity, and where the data in the TB was not decoded successfully before the attempt.
  • a transport block associated with the device-to-device communication
  • MAC media access control
  • the method further includes transmitting, by the network node, a transmission resource for a media access control (MAC) packet data unit (PDU) in a hybrid automatic repeat request (HARQ) buffer if at least one of the following is met: the transmission resource for the MAC PDU is indicated for preemption; the transmission resource for the MAC PDU is indicated for re-evaluation; the transmission resource for the MAC PDU is a conflicted resource indicated by the peer wireless device; or the transmission resource for the MAC PDU is where a consistent listen-before-talk (C-LBT) failure is detected by the wireless device.
  • MAC media access control
  • HARQ hybrid automatic repeat request
  • FIG. 13 shows an exemplary block diagram of a hardware platform 1300 that may be a part of a network node (e.g., base station, transmission parameter, or TRP) or a wireless device (e.g., a user equipment (UE) ) .
  • the hardware platform 1300 includes at least one processor 1310 and a memory 1305 having instructions stored thereupon. The instructions upon execution by the processor 1310 configure the hardware platform 1300 to perform the operations described in FIGS. 1 to 12 and in the various embodiments described in this patent document.
  • the transmitter 1315 transmits or sends information or data to another device.
  • a network node transmitter can send a message to a user equipment.
  • the receiver 1320 receives information or data transmitted or sent by another device.
  • a user equipment can receive a message from a network note.
  • a UE, a wireless device, or a network node, as described in the present document may be implemented using the hardware platform 1300.
  • FIG. 14 shows an example of a wireless communication system (e.g., a 5G or NR cellular network) that includes a base station 1420 and one or more user equipment (UE) 1411, 1412, 1413, and 1414.
  • the UEs access the BS (e.g., the network, the TRP) using a communication link to the network (sometimes called uplink direction, as depicted by dashed arrows 1431, 1432, 1433) , which then enables subsequent communication (e.g., shown in the direction from the network to the UEs, sometimes called downlink direction, shown by arrows 1441, 1442, 1443) from the BS to the UEs.
  • BS e.g., the network, the TRP
  • subsequent communication e.g., shown in the direction from the network to the UEs, sometimes called downlink direction, shown by arrows 1441, 1442, 1443
  • the BS send information to the UEs (sometimes called downlink direction, as depicted by arrows 1441, 1442, 1443) , which then enables subsequent communication (e.g., shown in the direction from the UEs to the BS, sometimes called uplink direction, shown by dashed arrows 1431, 1432, 1433) from the UEs to the BS.
  • the UE may be, for example, a smartphone, a tablet, a mobile computer, a machine to machine (M2M) device, an Internet of Things (IoT) device, and so on.
  • the UEs described in the present document may be communicatively coupled to the base station 1420 depicted in FIG. 14.
  • the UEs can also communicate with other UEs for sidelink communications.
  • An example of such a sidelink communication using which two UEs can perform device-to-device communications is shown as a two-way arrow between UEs 1413 and 1414.
  • the present patent document discloses methods of performing device-to-device communications. More specifically, the patent document discloses methods where wireless devices select transmission resources from multiple consecutive slot transmission (MCST) resource and select transmission resources for media access control (MAC) packet data units (PDUs) .
  • the wireless devices can receive hybrid automatic repeat request (HARQ) feedbacks and determine consistent listen-before-talk (C-LBT) failures. If a bandwidth part (BWP) associated with the device-to-device communication is deactivated, the wireless devices can also cancel the C-LBT failures.
  • HARQ hybrid automatic repeat request
  • C-LBT listen-before-talk
  • a computer-readable medium may include removable and non-removable storage devices including, but not limited to, Read Only Memory (ROM) , Random Access Memory (RAM) , compact discs (CDs) , digital versatile discs (DVD) , etc. Therefore, the computer-readable media can include a non-transitory storage media.
  • program modules may include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types.
  • Computer-or processor-executable instructions, associated data structures, and program modules represent examples of program code for executing steps of the methods disclosed herein. The particular sequence of such executable instructions or associated data structures represents examples of corresponding acts for implementing the functions described in such steps or processes.
  • a hardware circuit implementation can include discrete analog and/or digital components that are, for example, integrated as part of a printed circuit board.
  • the disclosed components or modules can be implemented as an Application Specific Integrated Circuit (ASIC) and/or as a Field Programmable Gate Array (FPGA) device.
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • DSP digital signal processor
  • the various components or sub-components within each module may be implemented in software, hardware, or firmware.
  • the connectivity between the modules and/or components within the modules may be provided using any one of the connectivity methods and media that is known in the art, including, but not limited to, communications over the Internet, wired, or wireless networks using the appropriate protocols.

Landscapes

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

Abstract

La présente invention concerne des systèmes, des procédés et un appareil de communication sans fil. Un procédé de communication sans fil consiste à sélectionner, par un dispositif sans fil, une ressource de transmission pour transmettre des données associées à une communication de dispositif à dispositif et effectuer, par le dispositif sans fil, la communication de dispositif à dispositif selon la ressource de transmission. Le procédé consiste en outre à détecter, par le dispositif sans fil, dans une durée de la communication de dispositif à dispositif, une défaillance d'écoute avant de parler cohérente (C-LBT). Le procédé consiste en outre à déterminer, par le dispositif sans fil, qu'une partie de bande passante (BWP) associée à la communication de dispositif à dispositif est désactivée et à annuler, par le dispositif sans fil, la défaillance de C-LBT.
PCT/CN2023/122955 2023-09-28 2023-09-28 Communication de dispositif à dispositif Pending WO2025065649A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2023/122955 WO2025065649A1 (fr) 2023-09-28 2023-09-28 Communication de dispositif à dispositif

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2023/122955 WO2025065649A1 (fr) 2023-09-28 2023-09-28 Communication de dispositif à dispositif

Publications (1)

Publication Number Publication Date
WO2025065649A1 true WO2025065649A1 (fr) 2025-04-03

Family

ID=95204587

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/122955 Pending WO2025065649A1 (fr) 2023-09-28 2023-09-28 Communication de dispositif à dispositif

Country Status (1)

Country Link
WO (1) WO2025065649A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103581890A (zh) * 2012-08-08 2014-02-12 电信科学技术研究院 一种终端控制方法、设备及系统
CN105357716A (zh) * 2015-12-10 2016-02-24 北京北方烽火科技有限公司 一种资源分配方法及装置
US20170094495A1 (en) * 2014-03-14 2017-03-30 Samsung Electronics Co., Ltd. Method for supporting proximity-based service configuring for ue
CN108432309A (zh) * 2015-11-06 2018-08-21 太阳专利托管公司 在侧行链路控制时段期间的多侧行链路控制传输

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103581890A (zh) * 2012-08-08 2014-02-12 电信科学技术研究院 一种终端控制方法、设备及系统
US20170094495A1 (en) * 2014-03-14 2017-03-30 Samsung Electronics Co., Ltd. Method for supporting proximity-based service configuring for ue
CN108432309A (zh) * 2015-11-06 2018-08-21 太阳专利托管公司 在侧行链路控制时段期间的多侧行链路控制传输
CN105357716A (zh) * 2015-12-10 2016-02-24 北京北方烽火科技有限公司 一种资源分配方法及装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CATT: "Discussion on shorter resource reservation period in PC5-based V2V", 3GPP DRAFT; R1-1702035, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Athens, GREECE; 20170213 - 20170217, 12 February 2017 (2017-02-12), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051209197 *

Similar Documents

Publication Publication Date Title
US11943168B2 (en) Method and apparatus for transmission and reception of sidelink feedback in wireless communication system
US20230189330A1 (en) Method for indicating the allocated resources for a harq message in a random access procedure for a low-complexity, narrowband terminal
CN116527199B (zh) 无线通信系统中的终端和第一基站及其方法
EP3591876B1 (fr) Procédé de transmission de données et dispositif associé
CN113826341B (zh) 用于上行链路传输的方法、终端设备和网络节点
US12477545B2 (en) Uplink control information related to configured grants
US12438647B2 (en) Methods for interpreting downlink control information and user equipment using the same
TW202127949A (zh) 在上行鏈路共享通道傳輸上多工上行鏈路控制資訊
EP3317992A1 (fr) Systèmes et procédés pour des procédures de réduction de charge pour l'accès assisté par présence de licence
US12089260B2 (en) Random access method, terminal device and network device
US20250024505A1 (en) Sidelink unlicensed resource reservation
CN116054976A (zh) 信道检测方法、装置及存储介质
US20240032028A1 (en) Cg resource processing method, terminal device, and network device
JP2020058054A (ja) コンテンションウィンドウ情報を決定するための方法および装置
CN106301444A (zh) 射频处理设备及处理方法
EP2647153B1 (fr) Procédé et dispositif pour contrôler une aggrégation de porteuses composantes
US20250287423A1 (en) Method related to sidelink operation in unlicensed bands, user equipment, and base station
US20250024470A1 (en) Method and device for performing sidelink communications
EP4290794A1 (fr) Procédé de traitement de temps de survie et dispositif terminal
US20240260131A1 (en) Method and Apparatus of Partial Sensing and DRX in Sidelink Communications
WO2025065649A1 (fr) Communication de dispositif à dispositif
JP2023062145A (ja) 通信リソースのプリエンプティブ予約
US20250024495A1 (en) Method for resource allocation on shared spectrum and device thereof
US20250324326A1 (en) Sidelink unlicensed resource reservation
US20250365762A1 (en) Coping with consistent listen-before-talk failure

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23953793

Country of ref document: EP

Kind code of ref document: A1