WO2023010257A1 - 侧行通信方法、装置、设备及存储介质 - Google Patents
侧行通信方法、装置、设备及存储介质 Download PDFInfo
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- WO2023010257A1 WO2023010257A1 PCT/CN2021/110149 CN2021110149W WO2023010257A1 WO 2023010257 A1 WO2023010257 A1 WO 2023010257A1 CN 2021110149 W CN2021110149 W CN 2021110149W WO 2023010257 A1 WO2023010257 A1 WO 2023010257A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
- H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/18—Interfaces between hierarchically similar devices between terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
Definitions
- the present application relates to the field of mobile communication, and in particular to a lateral communication method, device, equipment and storage medium.
- Embodiments of the present application provide a sidelink communication method, device, device, and storage medium, and provide a technical solution for performing sidelink transmission by performing LBT on authorization-free scheduling resources. Described technical scheme is as follows:
- a sidelink communication method which is applied to a first terminal for sidelink transmission, and the method includes:
- a sidelink communication method is provided, which is applied to a second terminal for sidelink transmission, and the method includes:
- a sidelink communication method device which is used to implement a first terminal for sidelink transmission, and the device includes:
- the LBT module is used to perform LBT on authorization-free scheduling resources
- An execution module configured to execute a target operation in the case that LBT continues to fail triggered on the authorization-free scheduling resource.
- a sidelink communication method device which is used to implement a second terminal for sidelink transmission, and the device includes:
- the second receiving module is configured to receive the LBT continuous failure message sent by the first terminal, the LBT continuous failure message is sent by the first terminal after triggering the LBT continuous failure on the authorization-free scheduling resource;
- the triggering module is used for triggering the radio link failure RLF.
- a terminal includes: a processor and a transceiver connected to the processor; wherein,
- the processor is configured to execute LBT on an authorization-free scheduling resource
- the processor is configured to execute a target operation in the case that LBT continues to fail triggered on the authorization-free scheduling resource.
- a terminal includes: a processor and a transceiver connected to the processor; wherein,
- the transceiver is configured to receive a listen-before-talk LBT continuous failure message sent by the first terminal, where the LBT continuous failure message is sent by the first terminal after triggering LBT continuous failure on an authorization-free scheduling resource;
- the processor is configured to trigger a radio link failure RLF.
- a computer-readable storage medium wherein executable instructions are stored in the readable storage medium, and the executable instructions are loaded and executed by a processor to implement the side communication method.
- a chip includes a programmable logic circuit and/or program instructions, and when the chip is run on a computer device, it is used to realize the sidewalk described in the above aspect communication method.
- a computer program product is provided.
- the computer program product runs on a processor of a computer device, the computer device executes the lateral communication method described in the above aspect.
- LBT Listen Before Talk, Listen Before Talk
- the first terminal performs LBT recovery or frequency domain reselection by performing targeted operations to select available resources for sidelink transmission.
- FIG. 1 is a schematic diagram of a transmission mode provided by an exemplary embodiment of the present application
- Fig. 2 is a schematic diagram of a system architecture provided by an exemplary embodiment of the present application.
- FIG. 3 is a method flowchart of a lateral communication method provided by an exemplary embodiment of the present application.
- Fig. 4 is a method flowchart of a lateral communication method provided by an exemplary embodiment of the present application.
- FIG. 5 is a method flowchart of a lateral communication method provided by an exemplary embodiment of the present application.
- Fig. 6 is a method flowchart of a lateral communication method provided by an exemplary embodiment of the present application.
- Fig. 7 is a method flowchart of a lateral communication method provided by an exemplary embodiment of the present application.
- Fig. 8 is a method flowchart of a lateral communication method provided in an exemplary embodiment of the present application.
- Fig. 9 is a structural block diagram of a lateral communication method device provided by an exemplary embodiment of the present application.
- Fig. 10 is a structural block diagram of a lateral communication method device provided by an exemplary embodiment of the present application.
- Fig. 11 is a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application.
- first, second, third, etc. may be used in the present disclosure to describe various information, the information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of the present disclosure, first information may also be called second information, and similarly, second information may also be called first information. Depending on the context, the word “if” as used herein may be interpreted as “at” or “when” or “in response to a determination.”
- LTE Long Term Evolution, long-term evolution
- D2D Device-to-Device, device-to-device communication
- V2X Vehicle-to-device communication
- V2X Vehicle to everything
- V2X communication includes Vehicle to Vehicle (V2V) communication, Vehicle to Infrastructure (V2I) communication and Vehicle to People (V2P) communication.
- V2X applications will improve driving safety, reduce congestion and vehicle energy consumption, and improve traffic efficiency.
- S Side Link
- Device-to-device communication is a sidelink transmission technology. Different from the way communication data is received or sent through network devices in traditional cellular systems, the Internet of Vehicles system uses terminal-to-device direct communication, so it has a higher frequency spectrum. efficiency and lower transmission delay.
- Two transmission modes of sidelink transmission are defined in 3GPP: Mode 1 and Mode 2.
- Mode 1 as shown in (1) in FIG. 1 the network device 110 configures transmission resources for the terminal 120, and the terminal 120 performs sidelink data transmission on the configured transmission resources.
- Mode 2 as shown in (2) in FIG. 1 the network device 110 allocates a resource pool for the terminal 120, and the terminal 120 selects one or more transmission resources from the resource pool for sidelink data transmission.
- the terminal 120 may select a transmission resource from the resource pool through sensing (sensing, or translated as "listening", “monitoring"), or select a transmission resource from the resource pool through random selection.
- the terminal relies on resource awareness or random selection to select time-frequency resources from the resource pool (candidate resources) configured or pre-configured by the network device for sending predictive information. Therefore, a more accurate description of mode 2 resource allocation should be resource selection.
- mode 2a In the SI phase of NR (New Radio, new air interface) V2X, four resource allocation schemes of mode 2 have been proposed, namely mode 2a, mode 2b, mode 2c and mode 2d.
- Mode 2a means that the terminal selects resources in the resource pool that are not reserved by other terminals or are reserved by other terminals but have low receiving power by decoding the sidelink control information and measuring the received power of the sidelink. Reduce the probability of resource collision and improve communication reliability.
- Mode 2a generally inherits the main design of the resource selection mechanism in LTE V2X Mode 4, and selects resources based on operations such as resource reservation, resource awareness, and resource exclusion.
- Mode 2b is a mode in which terminals perform resource selection through cooperation, that is, a terminal sends auxiliary information to help other terminals complete resource selection.
- the foregoing auxiliary information may be a resource sensing result obtained by the terminal performing resource sensing, or a resource suggested to be used by other terminals.
- terminal C sends auxiliary information to terminal A and terminal B, and terminal A and terminal B use the auxiliary information and the perception results of their own resource perception to select resources in the resource pool.
- Mode 2c means that the network device configures or pre-configures a resource pattern (pattern) for the terminal, and the terminal uses the resources in the resource pattern to send the initial transmission and retransmission, so as to achieve the effect of reducing the transmission delay.
- a resource pattern pattern
- the terminal selects one of the resource patterns by using resource perception or geographic location information.
- the terminal directly schedules time-frequency resources for other terminals.
- the second terminal (scheduled terminal) works in mode 2d
- the first terminal (scheduling terminal) can work in mode 1 or in mode 2.
- D2D is divided into different stages for research.
- ProSe Proximity based Service, proximity-based service
- Device-to-device communication in Rel-12/13 is researched on the ProSe scenario, which is mainly aimed at public security services.
- ProSe by configuring the position of the resource pool in the time domain, for example, the resource pool is discontinuous in the time domain, so that the UE (User Equipment, terminal) can discontinuously send/receive data on the sidelink, thereby saving power Effect.
- V2X Vehicle-to-vehicle
- Rel-14/15 the vehicle-to-vehicle communication system has been studied, which is mainly oriented to relatively high-speed mobile vehicle-to-vehicle and vehicle-to-human communication services; in V2X, due to the vehicle-to-vehicle system With continuous power supply, power efficiency is not the main problem, but the delay of data transmission is the main problem, so the system design requires the terminal equipment to perform continuous sending and receiving.
- FeD2D Wearable Devices
- this scenario studies the scenario where wearable devices access the network through mobile phones, and it is mainly for scenarios with low mobile speed and low power access.
- the 3GPP conclusion in the pre-research stage is that the network equipment can configure the DRX (Discontinuous Reception, discontinuous reception) parameters of the remote (remote) terminal through a relay (forwarding) terminal, but since this subject has not entered the standardization stage further, The exact details of how the DRX configuration is done are inconclusive.
- Multi-carrier In Rel-15LTE V2X, a multi-carrier mechanism is introduced. Specifically, the multi-carrier mechanism is reflected in that the UE can support data packet segmentation and use multiple carriers to transmit data packets to improve the data transmission rate; data packet duplication, will The same data packet is copied twice and sent with two carriers to improve transmission reliability; and multi-carrier reception enhancement at the receiving end.
- V2X side chain communication supports side chain packet replication, and is executed at the PDCP (Packet Data Convergence Protocol) layer of the UE.
- the PDCP PDU Packet Data Convergence Protocol
- the PDCP PDU Protocol Data Unit, Protocol Data Unit
- the duplicate PDP (Packet Data Protocol, packet data protocol) PDU of the same PDCP entity is submitted to two different RLC (Radio Link Control, radio link layer control protocol) entities and are respectively associated to two different side chain logical channels. Duplicate PDP PDUs of the same PDCP entity are only allowed to be transmitted on different sidechain carriers.
- the UE can activate or deactivate sidechain packet replication based on (pre)configuration. Sidechain packet replication does not apply to transmissions with Rel (Release)-14 transmission profile (3GPP (3rd Generation Partnership Project, Third Generation Partnership Project) TS (Technical Specification, Technical Specification) 23.285 [72]).
- the PPPR value that supports sidechain packet replication can be (pre)configured via PPPR threshold.
- the UE shall perform side-chain packet replication for data with configured PPPR values until the packet replication configuration is canceled for these PPPR values.
- the UE reports the amount of data associated with one or more PPPR values and the destination to which the data belongs through a sidechain BSR (Buffer Status Report).
- the mapping of the PPPR value to the logical channel group can be configured by the eNB, and the PPPR value is reflected by the associated logical channel group ID (Identity Document, identity identification number) included in the side chain BSR.
- a list of one or more PPPR values may be reported by an RRC (Radio Resource Control, radio resource control) connected UE in sidechain UE information.
- RRC Radio Resource Control, radio resource control
- NR V2X is not limited to broadcast scenarios, but has been further expanded to unicast and multicast scenarios, and the application of V2X is studied in these scenarios.
- NR V2X will also define the two resource authorization modes of mode 1 and mode 2 above; further, the terminal may be in a mixed mode, that is, it can use mode 1 for resource acquisition and at the same time can use Mode 2 acquires resources.
- the resource acquisition is indicated through the sidelink authorization, that is, the sidelink authorization indicates the corresponding PSCCH (Physical Sidelink Control Channel, physical sidelink control channel) and PSSCH (Physical Sidelink Shared Channel, physical sidelink shared channel) resource time-frequency location.
- PSCCH Physical Sidelink Control Channel
- PSSCH Physical Sidelink Shared Channel, physical sidelink shared channel
- NR V2X in addition to the HARQ (Hybrid Automatic Repeat reQuest, hybrid automatic repeat request) retransmission initiated by the UE without feedback, NR V2X introduces feedback-based HARQ retransmission, which is not limited to unicast communication, but also includes group broadcast communication.
- HARQ Hybrid Automatic Repeat reQuest, hybrid automatic repeat request
- LBT Listen Before Talk
- a transmitter transmitting terminal listens/senses a channel to determine whether the channel is free or busy, and performs transmission only when the channel is sensed to be free.
- a UE When a UE detects a consistent uplink LBT failure, it takes the actions specified in 3GPP TS 38.321 [6]. The detection is based on each bandwidth part (Bandwidth Part, BWP) and based on all uplink transmissions within the BWP.
- BWP Bandwidth Part
- the UE When a consistent uplink LBT failure is detected on the SCell (Secondary Cell, the secondary cell), the UE passes the MACCE (Medium Access Control Control Element, Media Access Control Unit) on a serving cell different from the SCell that detected the failure Report this to the corresponding gNB (MN (Master Node, primary node) for MCG (Master Cell group, primary cell group), SN (Secondary Node, secondary node) for SCG (Secondary Cell group, secondary cell group)) . If no resources are available for transmitting the MAC CE, the UE may transmit a Scheduling Request (SR).
- SR Scheduling Request
- the UE When a consistent uplink LBT failure is detected on the SpCell (special Cell, SpCell includes PCell and PSCell), the UE switches to another UL configured with RACH (Random Access Channel) resources on the cell BWP (Bandwidth Part, bandwidth part), initiates RACH, and reports failure through MACCE. When multiple UL BWPs are available for exchange, it is up to the UE implementation to choose which one.
- PSCell Primary Secondary Cell, primary secondary cell
- SCG RLF Radio Link Failure radio link failure
- SCGFailureInformation SCG Failure Information
- Fig. 2 shows a block diagram of a communication system supporting sidelink transmission provided by an exemplary embodiment of the present application.
- the communication system may be a schematic diagram of a non-roaming 5G system architecture (Non-roaming 5G system architecture), and the system architecture may be applied to a vehicle networking (Vehicle to everything, V2X) service using D2D (Device to Device, device to device) technology.
- V2X Vehicle to everything
- the system architecture includes a data network (Data Network, DN), in which a V2X application server (Application Server) required by the V2X service is set.
- the system architecture also includes the 5G core network.
- the network functions of the 5G core network include: unified data management (Unified Data Management, UDM), policy control function (Policy Control Function, PCF), network exposure function (Network Exposure Function, NEF), Application function (Application Function, AF), unified data storage (Unified Data Repository, UDR), access and mobility management function (Access and Mobility Management Function, AMF), session management function (Session Management Function, SMF) and user plane Function (User Plane Function, UPF).
- the system architecture also includes: a radio access network (New Generation-Radio Access Network, NG-RAN) and 4 terminals (namely, terminal 1 to terminal 4) shown as examples.
- NG-RAN New Generation-Radio Access Network
- each terminal is configured with a V2X application (Application) or an application supporting SL transmission.
- V2X application Application
- gNBs base stations
- the data network and the user plane function in the 5G core network are connected through the N6 reference point (Reference Point), and the V2X application server and the V2X application in the terminal are connected through the V1 reference point; the wireless access network and the 5G core network
- the AMF function and UPF function connection the wireless access network is connected to Terminal 1 and Terminal 5 respectively through the Uu reference point; the sidelink transmission is performed between multiple terminals through the PC5 reference point, and the V5 reference point is used between multiple V2X applications Click to connect.
- the aforementioned reference points may also be referred to as "interfaces".
- the "5G NR system" in the embodiments of the present disclosure may also be called a 5G system or an NR system, but those skilled in the art can understand its meaning.
- the technical solution described in the embodiments of the present disclosure can be applied to the 5G NR system, and can also be applied to the subsequent evolution system of the 5G NR system.
- the technical solutions described in the embodiments of the present disclosure can be applied to V2x applications, and can also be applied to other applications that use sidelink transmission, such as public safety (public safety) and commercial applications.
- FIG. 3 shows a flowchart of a lateral communication method provided by an embodiment of the present application.
- the method can be applied to any terminal (first terminal) in the system architecture shown in FIG. 2 .
- the method includes the following steps.
- Step 210 in a multi-carrier-based sidelink transmission scenario, the first terminal performs LBT on unlicensed scheduling resources.
- the first terminal is the sending terminal in the sidelink transmission.
- the first terminal is a terminal supporting a multi-carrier scenario, and the method in this embodiment of the present application is applied to sidelink transmission in a multi-carrier scenario.
- Grant-free scheduling resources are resources in the candidate resource set. That is, the candidate resource set of the first terminal includes grant-free scheduling resources.
- the candidate resource set is a resource set determined by the first terminal for the layer-2 target address or logical channel or HARQ process.
- the candidate resource set includes resources on the carrier set determined by the first terminal for the layer 2 target address or logical channel or HARQ process.
- Layer 2 includes at least one of an SDAP (Service Data Adaptation Protocol, Service Data Adaptation Protocol) layer, an RRC layer, a PDCP layer, an RLC layer, and a MAC (Medium Access Control, Media Access Control) layer.
- SDAP Service Data Adaptation Protocol, Service Data Adaptation Protocol
- RRC Radio Resource Control
- PDCP Packet Control Protocol
- RLC Radio Link Control
- MAC Medium Access Control, Media Access Control
- the set of candidate resources includes at least unlicensed scheduling resources (resources on unlicensed carriers), and based on this, the set of candidate resources may also include authorized resources (resources on authorized carriers).
- LBT is performed at the BWP granularity.
- “performing LBT on the license-free scheduling resource” may be referred to as performing LBT on the BWP on the carrier, and at this time, the license-free scheduling resource is a resource on the carrier.
- “performing LBT on the license-free scheduling resource” may refer to performing LBT on one BWP on the carrier, and at this time, the license-free scheduling resource is a resource on the BWP.
- Step 220 in the case that triggering LBT continues to fail on the authorization-free scheduling resource, execute the target operation.
- the method for triggering LBT continuous failure is as follows:
- the first terminal LBT detection times threshold and the LBT failure detection timer are configured by the network device for the first terminal.
- the MAC layer of the first terminal receives the LBT failure indication of the authorization-free scheduling resource transmitted by the physical layer (Physical Layer, PHY); the MAC layer starts or restarts the LBT failure detection timer, and increases the LBT failure count by 1; when the LBT failure count is greater than or equal to the threshold of LBT detection times, the MAC layer determines that triggering LBT on the authorization-free scheduling resources continues to fail.
- the physical layer Physical Layer, PHY
- the network device configures sl-lbt-FailureInstanceMaxCount (LBT detection times threshold) and sl-lbt-FailureDetectionTimer (LBT failure detection timer) for the terminal, and the MAC layer of the first terminal (sending terminal) will maintain SL_LBT_COUNTER (LBT failure count) and Initialized to 0.
- LBT detection times threshold sl-lbt-FailureInstanceMaxCount
- LBT failure detection timer LBT failure detection timer
- the method provided by this embodiment performs LBT on the authorization-free scheduling resources in a multi-carrier-based sidelink transmission scenario, and selects available resources on the authorization-free scheduling resources based on the LBT result for sidelink transmission.
- LBT fails, the first terminal performs LBT recovery or frequency domain reselection by performing target operations, so as to select available resources for sidelink transmission.
- the target operation performed by the first terminal after the LBT continues to fail includes at least one of frequency point switching, sending a failure message, and LBT recovery.
- Frequency switching refers to:
- the first terminal triggers continuous failure of LBT on a BWP of the candidate resource set.
- a BWP of an unlicensed carrier that does not trigger continuous failure of LBT in the candidate resource set, or there are available resources on the authorized carrier, then the first terminal Reselect resources in the candidate resource set for sidelink transmission.
- Sending failure message refers to:
- the first terminal triggers LBT continuous failure on a BWP, and sends an LBT failure message to the second terminal (the receiving terminal of the sidelink transmission) to inform the second terminal of the LBT failure.
- the first terminal triggers LBT continuous failure on BWPs of all carriers in the candidate resource set, and the first terminal sends an LBT continuous failure indication to the network device, so that the network device reconfigures a new candidate resource set.
- the above three target operations can be combined arbitrarily, for example, the first terminal can perform the above three target operations when triggering LBT continues to fail, or perform any of the above three target operations One or two.
- the first terminal determines a candidate resource set for sidelink transmission with respect to the layer 2 target address/logical channel/HARQ process.
- the set of candidate resources includes resources on unlicensed carriers (license-free scheduling resources).
- the description is made by taking as an example that the candidate resource set of the first terminal includes the grant-free scheduling resources on the first carrier and the resources on the second carrier.
- the first carrier is an unlicensed carrier
- the second carrier is an unlicensed carrier set or an authorized carrier.
- this embodiment of the present application provides two ways (1) and (2).
- step 210 includes step 211
- step 220 includes step 221 .
- Step 211 in the multi-carrier-based sidelink transmission scenario, perform LBT on the BWP of the first carrier.
- Step 221 in the case that triggering LBT continues to fail on the BWP of the first carrier, select resources from the second carrier for sidelink transmission.
- the first terminal traverses the candidate resource set to select an available resource from the candidate resource set for sidelink transmission.
- the first terminal switches to the next carrier.
- the carrier is an unlicensed carrier, continue to perform LBT on the carrier , if the LBT is successful, the available resources on the carrier are used for sidelink transmission; if the carrier is a licensed carrier and there are available resources, the available resources are used for sidelink transmission.
- the strategy for the first terminal to traverse the candidate resource set may be arbitrary, which is not limited in this embodiment of the present application.
- the first terminal performs LBT on the BWP of the second carrier; if the LBT is successfully triggered on the BWP of the second carrier, select available resources on the second carrier for side travel link transmission.
- LBT recovery is performed.
- triggering LBT on the BWP of the second carrier continues to fail, and the first terminal has not finished traversing the carriers in the candidate resource set, reselect available resources from the remaining untraversed carriers for sidelink transmission.
- the first terminal selects available resources on the second carrier to perform sidelink transmission.
- the resource will be triggered for this layer 2 target address/logical channel/HARQ process Reselection, further resource reselection will trigger carrier reselection, and the MAC entity of the first terminal will reselect other license-free carriers to perform LBT and send data.
- step 210 includes step 212
- step 220 includes step 222 .
- Step 212 in the multi-carrier-based sidelink transmission scenario, perform LBT on the first BWP.
- the candidate resource set of the first terminal includes authorization-free scheduling resources on the first BWP and resources on the second BWP.
- the first BWP is the BWP on the first carrier
- the second BWP is the BWP on the first carrier
- the second BWP is the BWP on the second carrier.
- Step 222 in the case that triggering LBT on the first BWP continues to fail, select resources from the second BWP for sidelink transmission.
- the first terminal traverses the candidate resource set to select an available resource from the candidate resource set for sidelink transmission.
- the first terminal switches to the next BWP, and if the carrier to which the BWP belongs is an unlicensed carrier, continue to execute on the BWP LBT, if the LBT is successful, use the available resources on the BWP for sidelink transmission; if the carrier to which the BWP belongs is an authorized carrier and there are available resources on the BWP, use the available resources for sidelink transmission.
- the strategy for the first terminal to traverse the candidate resource set may be arbitrary, which is not limited in this embodiment of the present application.
- LBT is performed on the second BWP; when LBT is successfully triggered on the second BWP, available resources are selected on the second BWP for sidelink transmission.
- LBT recovery is performed. In the case that triggering LBT on the second BWP continues to fail, and the first terminal has not finished traversing the BWPs in the candidate resource set, it reselects available resources from the remaining BWPs that have not been traversed to perform sidelink transmission.
- the carrier to which the second BWP belongs is a licensed carrier, available resources are selected on the second BWP to perform sidelink transmission.
- the method provided by this embodiment switches to another carrier/BWP in the candidate resource set when the candidate resource set has not been completely traversed after LBT continues to fail, and continues to select transmission resources.
- the switched carrier is a licensed carrier, select available resources on the licensed carrier for sidelink transmission; if the switched carrier is an unlicensed carrier, continue to perform LBT to select available resources for sidelink transmission after the LBT is successful link transmission.
- step 220 includes step 223 .
- Step 223 In the case of triggering LBT continuous failure on the BWP of the first carrier, and in the case of triggering LBT continuous failure on the authorization-free scheduling resource, send a LBT continuous failure message to the second terminal, and the LBT continuous failure message includes the first LBT Continuous failure indication and/or LBT persistent failure information.
- the second terminal is the receiving terminal for the sidelink transmission.
- the LBT persistent failure information includes at least one of LBT failure carrier, LBT failure BWP, LBT failure carrier set, LBT failure BWP set, target switching carrier, target switching BWP, target selection carrier, and target selection BWP.
- the first LBT continuous failure indication is used to inform the second terminal that the LBT continues to fail.
- the LBT failure carrier is the carrier that triggers the continuous failure of LBT, for example, the first carrier.
- the LBT failure BWP is the BWP that triggers the continuous failure of the LBT, for example, the first BWP.
- the target switching carrier is the carrier to which the frequency switching is performed, for example, the second carrier.
- the target switching BWP is the BWP to which the frequency switching is performed, for example, the second BWP.
- the target selected carrier is the carrier finally selected by the first terminal for sidelink transmission.
- the target selection BWP is the BWP finally selected by the first terminal for sidelink transmission.
- the LBT continuous failure message is carried on the MAC CE.
- the first LBT continuous failure indication and the LBT continuous failure information in the LBT continuous failure message may be carried on the same MAC CE, or may be carried on different MAC CEs.
- the LBT continuous failure message includes the first LBT continuous failure indication and the LBT continuous failure information; in one case: the first LBT continuous failure indication is carried on the first MAC CE, and the LBT continuous failure information is carried on the second MAC CE In another case: the first LBT continuous failure indication and the LBT continuous failure information are carried on the third MAC CE.
- LBT continuous failure is triggered for a certain carrier/a certain BWPMAC layer, for unicast, multicast or broadcast services:
- the first terminal can send an LBT failure message to the second terminal.
- the LBT failure message may include at least one of the following information: LBT failure indication, LBT failure carrier or carrier set, target switching carrier, and carrier to which the first terminal is to switch to continue sending service data.
- the first terminal sends an LBT persistent failure message to the second terminal on the available resources for sidelink transmission.
- the first terminal may consider sending the LBT continuous failure message in the following manner:
- the first terminal can report an LBT request assistance (SL-BSR or RRC message) to the network device, and the network device assists in performing LBT and sharing the available resources on the carrier through COT (Channel Occupancy Time, channel occupancy time) The first terminal.
- the first terminal sends the sidelink transmission on the license-free scheduling resource where the network device performs LBT scheduling.
- the first terminal when there is no available resource for sidelink transmission, the first terminal sends an LBT request for assistance to the network device; the network device receives the LBT request for assistance, assists in the execution of LBT, and configures the first terminal for authorization-free assistance through COT sharing Scheduling resources.
- the first terminal receives the auxiliary authorization-free scheduling resource configured for the first terminal shared by the network device through the COT.
- the auxiliary authorization-free scheduling resource includes the available resources obtained by the network device assisting in the execution of LBT;
- the terminal sends an LBT continuous failure message.
- the LBT request for assistance is carried in an SL-BSR or RRC message.
- the first terminal may send the LBT failure message through the default sending resource pool configured on the authorized carrier.
- the sending resource pool may be a mode 2 candidate resource pool.
- the LBT persistent failure message is sent to the second terminal through the candidate resource pool configured on the default authorized carrier.
- the candidate resource pool is the candidate resource pool of mode 2.
- default in the default authorized carrier is translated as “default”, and the default authorized carrier is configured by the network device.
- the configuration of the default authorized carrier can be configured in the following ways:
- the first terminal and the second terminal may negotiate through the PC5-RRC message when the unicast connection is established.
- the default authorized carrier is determined through PC5-RRC message negotiation when the first terminal establishes a connection with the second terminal.
- the network device configures a default authorized carrier for the first terminal or the second terminal, and the first terminal negotiates and determines to use the default authorized carrier when establishing a connection with the second terminal.
- the configuration granularity can be layer 2 target address/QoS (Quality of Service, quality of service)/logical channel.
- the default authorized carrier is configured by the network device.
- the default authorized carrier is configured by the network device based on the layer 2 target address, QoS or logical channel.
- the first MAC CE can be sent using the methods shown in 2.1) and 2.2), while the second MAC CE The resources of can be scheduled by the second terminal for the first terminal.
- the resource for sending the LBT continuous failure message may be provided by the second terminal.
- the network device may configure a first LBT timer for the second terminal. When the first LBT timer expires and the second terminal runs on the first LBT timer When no data packet sent by the first terminal is received within the time period, the second terminal dispatches a sidelink grant (sidelink authorization resource) to the first terminal. If LBT failure (LBT continuous failure) occurs in the first terminal, then The first terminal can use the sidelink grant to send an LBT continuous failure message to the second terminal.
- sidelink grant sidelink authorization resource
- the first LBT continuous failure indication is carried on the first MAC CE
- the LBT continuous failure information is carried on the second MAC CE.
- the first terminal sends a first MAC CE to the second terminal, and the first MAC CE includes a first LBT continuous failure indication.
- the second terminal receives the first MAC CE sent by the first terminal, and the first MAC CE carries a first LBT continuous failure indication; in response to the first MAC CE, the second terminal starts the first LBT timer, and the first LBT timer is the network
- the device is configured for the second terminal; when the first LBT timer expires and the sidelink transmission data sent by the first terminal is not received, the sidelink grant resource is scheduled to the first terminal; wherein, the sidelink grant Resource used to send LBT persistent failure messages.
- the first terminal receives the sidelink grant resource scheduled by the second terminal for the first terminal, and the sidelink grant resource is the case where the second terminal has not received the sidelink transmission data sent by the first terminal when the first LBT timer expires.
- the following is scheduled for the first terminal, the first LBT timer is started when the second terminal receives the first MAC CE; the second MAC CE is sent to the second terminal on the sideline transmission resource, and the second MAC CE includes LBT Continuous failure message.
- the first terminal after triggering LBT continuous failure, the first terminal sends an LBT continuous failure message to the second terminal to inform the second terminal that LBT continues to fail, and the carrier and BWP of LBT continuous failure or a carrier set or a BWP set, and indicate to the second terminal the target switching carrier or the target switching BWP, so that the second terminal responds to the continuous failure of the LBT, so as to implement sidelink transmission on the unlicensed scheduling resources.
- the second terminal may trigger a radio link failure (RLF) after receiving the LBT continuous failure message.
- RLF radio link failure
- FIG. 7 shows a flow chart of a lateral communication method provided by an embodiment of the present application.
- the method can be applied to any terminal (second terminal) in the system architecture shown in FIG. 2 .
- the method includes the following steps:
- Step 310 the second terminal receives the LBT continuous failure message sent by the first terminal.
- the LBT continuous failure message is sent after the first terminal triggers the LBT continuous failure on the authorization-free scheduling resource.
- the LBT continuous failure message includes the first LBT continuous failure indication and/or LBT continuous failure information; wherein, the LBT continuous failure information includes the LBT failure carrier, or the LBT failure BWP, the LBT failure carrier set, the LBT failure BWP set, the target switching carrier, the target Toggle at least one of the BWPs.
- the first terminal is connected to the second terminal by unicast.
- Step 320 the second terminal triggers RLF.
- the network device may configure the second LBT timer for the second terminal.
- the second terminal receives the LBT continuous failure message sent by the first terminal
- the first terminal configures the target switching carrier/target switching BWP/default authorized carrier in the LBT continuous failure message
- the second terminal will start the second LBT timer, when the second LBT timer expires and the second terminal does not receive new data sent by the first terminal on the indicated target switching carrier/target switching BWP/default authorized carrier, the second terminal will trigger RLF.
- the LBT persistent failure message includes a target switching carrier or a target switching BWP.
- the second terminal receives the second LBT timer configured by the network device for the second terminal.
- the second terminal starts a second LBT timer; when the second LBT timer expires and the second terminal does not receive the sidelink transmission data sent by the first terminal on the target transmission resource , the second terminal triggers RLF; wherein, the target transmission resource includes at least one of a target handover carrier, a target handover BWP, and a default authorized carrier.
- the first terminal When the first terminal triggers LBT continuous failure on the current carrier, and the first terminal is not configured with a target switching carrier/target switching BWP/default authorized carrier that can be used for switching, the first terminal does not The instruction to switch carriers will be carried in the LBT continuous failure message, and the second terminal will immediately trigger the RLF when receiving the LBT continuous failure message.
- the LBT persistent failure message does not include the target switching carrier or the target switching BWP; in response to the LBT persistent failure message, the RLF is triggered.
- the second terminal after the second terminal receives the LBT continuous failure message sent by the first terminal, if the LBT continuous failure message indicates the target switching carrier or the target switching BWP or the default authorized carrier, then The second terminal starts the timer. If the data packet sent by the first terminal is not received before the timer expires, the first terminal triggers RLF; if the LBT continuous failure message does not indicate the target switching carrier or target switching BWP or default authorization carrier, the second terminal triggers the RLF when receiving the LBT persistent failure message.
- FIG. 8 shows a flowchart of a lateral communication method provided by an embodiment of the present application. The method can be applied to any terminal (first terminal) in the system architecture shown in FIG. 2 . Based on the exemplary embodiment shown in FIG. 3 , step 220 includes step 224 .
- Step 210 in the multi-carrier-based sidelink transmission scenario, execute LBT on the unlicensed scheduling resources, which are the resources on all the carriers in the candidate resource set.
- Step 224 In the case that all BWPs in the candidate resource set trigger continuous LBT failure, send a second continuous LBT failure indication to the network device.
- the second LBT persistent failure indication is carried in RRC signaling.
- the second LBT persistent failure indication includes the candidate resource set determined by the MAC layer for the layer-2 target address or logical channel or HARQ process.
- the MAC layer When the SL-BWP on all carriers selected by this layer 2 target address/logical channel/HARQ process triggers LBT continuous failure, the MAC layer will report the LBT continuous failure to the upper layer.
- the RRC layer receives the third LBT continuous failure indication reported by the MAC layer, it will report the second LBT continuous failure indication for this destination ID (target address) to the network device through the uplink resource through RRC signaling.
- the first Two LBT persistent failure indications can be associated with the set of carriers selected by the MAC layer for this destination ID. The network device can reconfigure the carrier set for this destination ID.
- the MAC layer of the first terminal transmits the third LBT continuous failure indication to the RRC layer; the third LBT continuous failure sent by the MAC layer is received at the RRC layer In the case of an indication, the RRC layer sends the second LBT persistent failure indication to the network device through RRC signaling.
- the first terminal may also receive transmission resources configured by the network device for sidelink transmission. Resources are selected from newly configured transmission resources for sidelink transmission.
- the method provided by this embodiment sends an LBT continuous failure indication to the network device after the BWP on all carriers in the candidate resource set triggers the LBT continuous failure, so that the network device reconfigures the carrier for the first terminal , for sidelink transmission, so that after the first terminal fails to perform LBT on the grant-free scheduling resource, it can complete the sidelink transmission according to the resources reconfigured by the network device.
- Fig. 9 shows a structural block diagram of a sidelink communication method device provided by an exemplary embodiment of the present application, the device is used to implement a first terminal for sidelink transmission, or one or more modules in the first terminal , the device includes:
- the LBT module 401 is configured to perform listen-before-talk LBT on authorization-free scheduling resources
- the execution module 402 is configured to execute the target operation in the case that the LBT continues to fail triggered on the authorization-free scheduling resource.
- the device also includes:
- the MAC module 403 is used for the medium access control MAC layer of the first terminal to receive the LBT failure indication of the authorization-free scheduling resource transmitted by the physical layer PHY;
- the MAC module 403 is used for the MAC layer to start or restart the LBT failure detection timer, and increase the LBT failure count by 1;
- the MAC module 403 is configured to, when the LBT failure count is greater than or equal to the LBT detection times threshold, the MAC layer determines to trigger the LBT continuous failure on the authorization-free scheduling resource.
- the device also includes:
- the LBT detection times threshold and the LBT failure detection timer are configured by the network device for the first terminal.
- the target operation includes at least one of frequency switching, sending a failure message, and LBT recovery.
- the target operation includes the frequency switching
- the candidate resource set of the first terminal includes the license-free scheduling resource on the first carrier and resources on the second carrier
- the execution module 402 includes a reselection submodule 405;
- the LBT module 401 is configured to perform LBT on the bandwidth part BWP of the first carrier;
- the reselection submodule 405 is configured to select resources from the second carrier to perform the sidelink transmission when the LBT continues to fail triggered on the BWP of the first carrier.
- the reselection submodule 405 is configured to perform LBT on the BWP of the second carrier when the second carrier is an unlicensed carrier; When the LBT is successfully triggered on the BWP of the second carrier, select available resources on the second carrier to perform the sidelink transmission;
- the reselection submodule 405 is configured to select the available resource on the second carrier to perform the sidelink transmission if the second carrier is a licensed carrier.
- the target operation includes the frequency switching
- the candidate resource set of the first terminal includes the authorization-free scheduling resource on the first BWP and the resource on the second BWP
- the execution module 402 includes a reselection submodule 405;
- the LBT module 401 is configured to execute LBT on the first BWP;
- the reselection submodule 405 is configured to select resources from the second BWP to perform the sidelink transmission when the LBT continues to fail triggered on the first BWP;
- the first BWP is the BWP on the first carrier
- the second BWP is the BWP on the first carrier or the second carrier.
- the reselection submodule 405 is configured to perform LBT on the second BWP when the carrier to which the second BWP belongs is an unlicensed carrier; When triggering LBT on the second BWP is successful, select available resources on the second BWP to perform the sidelink transmission;
- the reselection submodule 405 is configured to select available resources on the second BWP to perform the sidelink transmission when the carrier to which the second BWP belongs is a licensed carrier.
- the target operation includes the sending failure message, and the sidelink transmission further includes the second terminal;
- the execution module 402 includes a sending submodule 406;
- the sending submodule 406 is configured to send an LBT persistent failure message to the second terminal in the case that the LBT persistent failure is triggered on the authorization-free scheduling resource, and the LBT persistent failure message includes a first LBT persistent failure indication and/or LBT persistent failure messages;
- the LBT persistent failure information includes at least one of LBT failure carrier, LBT failure BWP, LBT failure carrier set, LBT failure BWP set, target switching carrier, target switching BWP, target selection carrier, and target selection BWP.
- the LBT persistent failure message is carried on a media access control element MAC CE.
- the LBT continuous failure message includes the first LBT continuous failure indication and the LBT continuous failure information
- the first LBT continuous failure indication is carried on the first MAC CE, and the LBT continuous failure information is carried on the second MAC CE;
- the first LBT continuous failure indication and the LBT continuous failure information are carried on the third MAC CE.
- the sending submodule 406 is configured to, if there are available resources for the sidelink transmission, send the The second terminal sends the LBT continuous failure message.
- the device also includes:
- the sending submodule 406 is configured to send an LBT request assistance to the network device when there is no available resource for the sidelink transmission;
- the first receiving module 404 is configured to receive the auxiliary authorization-free scheduling resource configured for the first terminal by the network device sharing the channel occupancy time length COT, and the auxiliary authorization-free scheduling resource includes the auxiliary authorization-free scheduling resource obtained by the network device assisting in performing LBT available resources;
- the sending submodule 406 is configured to send the LBT persistent failure message to the second terminal on the auxiliary authorization-free scheduling resource.
- the LBT request assistance is carried in a sidelink-buffer status report SL-BSR or a radio resource control RRC message.
- the sending submodule 406 is configured to, in the case that there are no available resources for the sidelink transmission, send a message to the second The second terminal sends the LBT continuous failure message.
- the candidate resource pool is a mode 2 candidate resource pool.
- the default authorized carrier is determined through PC5-RRC message negotiation when the first terminal establishes a connection with the second terminal.
- the default authorized carrier is configured by a network device.
- the default authorized carrier is configured by the network device based on layer 2 target address, quality of service QoS or logical channel .
- the first LBT persistent failure indication is carried on the first MAC CE, and the LBT persistent failure information is carried on the second MAC CE; the device further includes:
- the first receiving module 404 is configured to receive the side grant resource scheduled by the second terminal for the first terminal, where the side grant resource is not received by the second terminal when the first LBT timer expires When the sidelink transmission data sent by the first terminal is scheduled for the first terminal, the first LBT timer is started when the second terminal receives the first MAC CE ;
- the sending submodule 406 is configured to send the first MAC CE to the second terminal, where the first MAC CE includes the first LBT persistent failure indication;
- the sending submodule 406 is configured to send the second MAC CE to the second terminal on the sidelink transmission resource, where the second MAC CE includes the LBT persistent failure information.
- the target operation includes the LBT recovery, and the authorization-free scheduling resources are resources on all carriers in the candidate resource set;
- the execution module 402 includes: a sending submodule 406;
- the sending submodule 406 is configured to send a second LBT persistent failure indication to the network device when the LBT persistent failure is triggered on all BWPs of the candidate resource set.
- the second LBT persistent failure indication is carried in radio resource control RRC signaling.
- the second LBT persistent failure indication includes the candidate resource set determined by the medium access control MAC layer for a layer 2 target address or a logical channel or a hybrid automatic repeat process (HARQ) process.
- HARQ hybrid automatic repeat process
- the device also includes:
- the first receiving module 404 is configured to receive the transmission resource configured by the network device for the sidelink transmission.
- the device also includes:
- the MAC module 403 configured to trigger the LBT persistent failure on all BWPs of the candidate resource set, the MAC layer of the first terminal transmits a third LBT persistent failure indication to the RRC layer;
- the sending submodule 406 is configured to, when the RRC layer receives the third LBT persistent failure indication sent by the MAC layer, send the RRC layer to the network device through RRC signaling. Second LBT persistent failure indication.
- the candidate resource set of the first terminal includes the authorization-free scheduling resource, and the candidate resource set includes the resource determined by the first terminal for the Layer 2 target address or logical channel or HARQ process. collection of resources.
- Fig. 10 shows a structural block diagram of a sidelink communication method device provided by an exemplary embodiment of the present application, the device is used to implement a second terminal for sidelink transmission, or one or more modules in the second terminal , the device includes:
- the second receiving module 501 is configured to receive the LBT continuous failure message sent by the first terminal, the LBT continuous failure message is sent by the first terminal after triggering the LBT continuous failure on the authorization-free scheduling resource;
- a triggering module 502 configured to trigger a radio link failure RLF.
- the LBT continuous failure message includes a first LBT continuous failure indication and/or LBT continuous failure information
- the LBT persistent failure information includes at least one of LBT failure carrier, or LBT failure BWP, LBT failure carrier set, LBT failure BWP set, target switching carrier, target switching BWP, target selection carrier, and target selection BWP.
- the LBT persistent failure message includes the target switching carrier or the target switching BWP; the device further includes:
- a timing module 503, configured to start a second LBT timer in response to the LBT continuous failure message
- the triggering module 502 is configured to trigger the RLF when the second LBT timer expires and the sidelink transmission data sent by the first terminal on the target transmission resource is not received;
- the target transmission resource includes at least one of the target handover carrier, the target handover BWP, and a default authorized carrier.
- the second receiving module 501 is configured to receive the second LBT timer configured by a network device for the second terminal.
- the LBT persistent failure message does not include the target switching carrier or the target switching BWP;
- the triggering module 502 is configured to trigger the RLF in response to the LBT persistent failure message.
- the LBT continuous failure message includes the first LBT continuous failure indication and the LBT continuous failure information; the device further includes:
- the second receiving module 501 is configured to receive the first MAC CE sent by the first terminal, the first MAC CE carrying the first LBT continuous failure indication;
- a timing module 503, configured to start a first LBT timer in response to the first MAC CE, where the first LBT timer is configured by the network device for the second terminal;
- a scheduling module 504, configured to schedule sidelink grant resources to the first terminal when the first LBT timer expires and the sidelink transmission data sent by the first terminal is not received;
- the side grant resource is used to send the LBT continuous failure information.
- FIG. 11 shows a schematic structural diagram of a communication device (terminal or network device) provided by an exemplary embodiment of the present application.
- the communication device includes: a processor 101 , a receiver 102 , a transmitter 103 , a memory 104 and a bus 105 .
- the processor 101 includes one or more processing cores, and the processor 101 executes various functional applications and information processing by running software programs and modules.
- the receiver 102 and the transmitter 103 can be implemented as a communication component, which can be a communication chip.
- the memory 104 is connected to the processor 101 through the bus 105 .
- the memory 104 may be used to store at least one instruction, and the processor 101 is used to execute the at least one instruction, so as to implement various steps in the foregoing method embodiments.
- the memory 104 can be implemented by any type of volatile or non-volatile storage device or their combination.
- the volatile or non-volatile storage device includes but not limited to: magnetic disk or optical disk, electrically erasable and programmable Electrically-Erasable Programmable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Static Random Access Memory (SRAM), Read-Only Memory (Read-Only Memory, ROM), magnetic memory, flash memory, programmable read-only memory (Programmable Read-Only Memory, PROM).
- the processor and the transceiver in the communication device involved in the embodiment of the present application may perform the steps performed by the terminal in any of the methods shown above, which will not be repeated here.
- the processor is used for the processor, configured to execute LBT on the authorization-free scheduling resource; and execute the target operation when triggering LBT continuous failure on the authorization-free scheduling resource.
- the receiver is configured to receive a listen-before-talk LBT continuous failure message sent by the first terminal, where the LBT continuous failure message is sent by the first terminal after the LBT continuous failure is triggered on an authorization-free scheduling resource;
- the processor is configured to trigger a radio link failure RLF.
- a computer-readable storage medium stores at least one instruction, at least one program, a code set or an instruction set, the at least one instruction, the At least one section of program, the code set or instruction set is loaded and executed by the processor to implement the sidewalk communication method performed by the communication device provided in the above method embodiments.
- a chip is also provided, the chip includes a programmable logic circuit and/or program instructions, and when the chip is run on a computer device, it is used to realize the sidewalk communication described in the above aspect method.
- the program can be stored in a computer-readable storage medium.
- the above-mentioned The storage medium mentioned may be a read-only memory, a magnetic disk or an optical disk, and the like.
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Abstract
Description
本申请涉及移动通信领域,特别涉及一种侧行通信方法、装置、设备及存储介质。
本申请实施例提供了一种侧行通信方法、装置、设备及存储介质,提供了一种在免授权调度资源上执行LBT的方式进行侧行链路传输的技术方案。所述技术方案如下:
根据本申请的一个方面,提供了一种侧行通信方法,应用于侧行链路传输的第一终端中,所述方法包括:
根据本申请的一个方面,提供了一种侧行通信方法,应用于侧行链路传输的第二终端中,所述方法包括:
根据本申请的一个方面,提供了一种计算机可读存储介质,所述可读存储介质中存储有可执行指令,所述可执行指令由处理器加载并执行以实现如上述方面所述的侧行通信方法。
根据本申请实施例的一个方面,提供了一种芯片,所述芯片包括可编程逻辑电路和/或程序指令,当所述芯片在计算机设备上运行时,用于实现上述方面所述的侧行通信方法。
根据本申请的一个方面,提供了一种计算机程序产品,该计算机程序产品在计算机设备的处理器上运行时,使得计算机设备执行上述方面所述的侧行通信方法。
图3是本申请一个示例性实施例提供的侧行通信方法的方法流程图;
图4是本申请一个示例性实施例提供的侧行通信方法的方法流程图;
图5是本申请一个示例性实施例提供的侧行通信方法的方法流程图;
图6是本申请一个示例性实施例提供的侧行通信方法的方法流程图;
图7是本申请一个示例性实施例提供的侧行通信方法的方法流程图;
图8是本申请一个示例性实施例提供的侧行通信方法的方法流程图;
请参考图3,其示出了本申请一个实施例提供的侧行通信方法的流程图,该方法可以应用于图2所示的系统架构中的任意一个终端(第一终端)。该方法包括如下步骤。
(1)当一个载波上只有一个BWP时,请参考图4,其示出了本申请一个实施例提供的侧行通信方法的流程图,该方法可以应用于图2所示的系统架构中的任意一个终端(第一终端)。基于图3所示的示例性实施例,步骤210包括步骤211,步骤220包括步骤221。
(2)当一个载波上可以有多个BWP时,请参考图5,其示出了本申请一个实施例提供的侧行通信方法的流程图,该方法可以应用于图2所示的系统架构中的任意一个终端(第一终端)。基于图3所示的示例性实施例,步骤210包括步骤212,步骤220包括步骤222。
请参考图6,其示出了本申请一个实施例提供的侧行通信方法的流程图,该方法可以应用于图2所示的系统架构中的任意一个终端(第一终端)。基于图3所示的示例性实施例,步骤220包括步骤223。
请参考图7,其示出了本申请一个实施例提供的侧行通信方法的流程图,该方法可以应用于图2所示的系统架构中的任意一个终端(第二终端)。该方法包括以下步骤:
请参考图8,其示出了本申请一个实施例提供的侧行通信方法的流程图,该方法可以应用于图2所示的系统架构中的任意一个终端(第一终端)。基于图3所示的示例性实施例,步骤220包括步骤224。
在示例性实施例中,还提供了一种计算机可读存储介质,所述计算机可读存储介质中存储有至少一条指令、至少一段程序、代码集或指令集,所述至少一条指令、所述至少一段程序、所述代码集或指令集由处理器加载并执行以实现上述各个方法实施例提供的由通信设备执行的侧行通信方法。
在示例性实施例中,还提供了一种芯片,所述芯片包括可编程逻辑电路和/或程序指令,当所述芯片在 计算机设备上运行时,用于实现上述方面所述的侧行通信方法。
在示例性实施例中,还提供了一种计算机程序产品,该计算机程序产品在计算机设备的处理器上运行时,使得计算机设备执行上述方面所述的侧行通信方法。
Claims (68)
- [根据细则91更正 23.08.2021]
一种侧行通信方法,其特征在于,应用于侧行链路传输的第一终端中,所述方法包括:在免授权调度资源上执行先听后说LBT;在所述免授权调度资源上触发LBT持续失败的情况下,执行目标操作。 - 根据权利要求1所述的方法,其特征在于,所述方法还包括:所述第一终端的媒体接入控制MAC层接收物理层PHY传输的所述免授权调度资源的LBT失败指示;所述MAC层启动或重新启动LBT失败检测定时器,将LBT失败计数增加1;在所述LBT失败计数大于或等于LBT检测次数门限的情况下,所述MAC层确定在所述免授权调度资源上触发所述LBT持续失败。
- 根据权利要求2所述的方法,其特征在于,所述LBT检测次数门限和所述LBT失败检测定时器是网络设备为所述第一终端配置的。
- 根据权利要求1至3任一所述的方法,其特征在于,所述目标操作包括频点切换、发送失败消息和LBT恢复中的至少一种。
- 根据权利要求4所述的方法,其特征在于,所述目标操作包括所述频点切换,所述第一终端的候选资源集包括第一载波上的所述免授权调度资源和第二载波上的资源;所述在免授权调度资源上执行先听后说LBT,包括:在所述第一载波的带宽部分BWP上执行LBT;所述在所述免授权调度资源上触发LBT持续失败的情况下,执行目标操作,包括:在所述第一载波的BWP上触发所述LBT持续失败的情况下,从所述第二载波中选择资源进行所述侧行链路传输。
- 根据权利要求5所述的方法,其特征在于,所述从所述第二载波中选择资源进行所述侧行链路传输,包括:在所述第二载波为免授权载波的情况下,在所述第二载波的BWP上执行LBT;在所述第二载波的BWP上触发LBT成功的情况下,在所述第二载波上选择可用资源进行所述侧行链路传输;或,在所述第二载波为授权载波的情况下,在所述第二载波上选择所述可用资源进行所述侧行链路传输。
- 根据权利要求4所述的方法,其特征在于,所述目标操作包括所述频点切换,所述第一终端的候选资源集包括第一BWP上的所述免授权调度资源和第二BWP上的资源;所述在免授权调度资源上执行先听后说LBT,包括:在所述第一BWP上执行LBT;所述在所述免授权调度资源上触发LBT持续失败的情况下,执行目标操作,包括:在所述第一BWP上触发所述LBT持续失败的情况下,从所述第二BWP中选择资源进行所述侧行链路传输;其中,所述第一BWP为第一载波上的BWP,所述第二BWP为所述第一载波或第二载波上的BWP。
- 根据权利要求7所述的方法,其特征在于,所述从所述第二BWP中选择资源进行所述侧行链路传输,包括:在所述第二BWP所属的载波为免授权载波的情况下,在所述第二BWP上执行LBT;在所述第二BWP上触发LBT成功的情况下,在所述第二BWP上选择可用资源进行所述侧行链路传输;或,在所述第二BWP所属的载波为授权载波的情况下,在所述第二BWP上选择可用资源进行所述侧行链路传输。
- 根据权利要求4所述的方法,其特征在于,所述目标操作包括所述发送失败消息,所述侧行链路传输还包括第二终端;所述在所述免授权调度资源上触发LBT持续失败的情况下,执行目标操作,包括:在所述免授权调度资源上触发LBT持续失败的情况下,向所述第二终端发送LBT持续失败消息,所述LBT持续失败消息包括第一LBT持续失败指示和/或LBT持续失败信息;其中,所述LBT持续失败信息包括LBT失败载波、LBT失败BWP、LBT失败载波集合、LBT失败BWP集合、目标切换载波、目标切换BWP、目标选择载波、目标选择BWP中的至少一种。
- 根据权利要求9所述的方法,其特征在于,所述LBT持续失败消息承载在媒体接入控制单元MAC CE上。
- 根据权利要求10所述的方法,其特征在于,所述LBT持续失败消息包括所述第一LBT持续失败指示和所述LBT持续失败信息;所述第一LBT持续失败指示承载在第一MAC CE上,所述LBT持续失败信息承载在第二MAC CE上;或,所述第一LBT持续失败指示和所述LBT持续失败信息承载在第三MAC CE上。
- 根据权利要求9所述的方法,其特征在于,所述向所述第二终端发送LBT持续失败消息,包括:在存在所述侧行链路传输的可用资源的情况下,在所述侧行链路传输的可用资源上向所述第二终端发送所述LBT持续失败消息。
- 根据权利要求9所述的方法,其特征在于,所述方法还包括:在不存在所述侧行链路传输的可用资源的情况下,向网络设备发送LBT请求协助;接收所述网络设备通过信道占用时长COT共享为所述第一终端配置的辅助免授权调度资源,所述辅助免授权调度资源包括所述网络设备辅助执行LBT得到的可用资源;所述向所述第二终端发送LBT持续失败消息,包括:在所述辅助免授权调度资源上向所述第二终端发送所述LBT持续失败消息。
- 根据权利要求13所述的方法,其特征在于,所述LBT请求协助承载在侧行链路-缓存状态报告SL-BSR或无线资源控制RRC消息中。
- 根据权利要求9所述的方法,其特征在于,所述向所述第二终端发送LBT持续失败消息,包括:在不存在所述侧行链路传输的可用资源的情况下,通过默认授权载波上配置的候选资源池向所述第二终端发送所述LBT持续失败消息。
- 根据权利要求15所述的方法,其特征在于,所述候选资源池为模式2的候选资源池。
- 根据权利要求15所述的方法,其特征在于,对于所述第一终端的单播业务,所述默认授权载波是所述第一终端与第二终端建立连接时通过PC5-RRC消息协商确定的。
- 根据权利要求15所述的方法,其特征在于,对于所述第一终端的单播、组播或广播业务,所述默认授权载波是网络设备配置的。
- 根据权利要求15所述的方法,其特征在于,在所述第一终端处于单播、组播或广播的状态下,所述默认授权载波是网络设备基于层二目标地址、服务质量QoS或逻辑信道配置的。
- 根据权利要求11所述的方法,其特征在于,所述第一LBT持续失败指示承载在所述第一MAC CE上,所述LBT持续失败信息承载在所述第二MAC CE上;所述方法还包括:接收所述第二终端为所述第一终端调度的侧行授权资源,所述侧行授权资源是所述第二终端在第一LBT定时器超时且未接收到所述第一终端发送的侧行链路传输数据的情况下为所述第一终端调度的,所述第一LBT定时器是在所述第二终端接收到所述第一MAC CE时启动的;所述向所述第二终端发送LBT持续失败消息,包括:向所述第二终端发送所述第一MAC CE,所述第一MAC CE包括所述第一LBT持续失败指示;在所述侧行传输资源上向所述第二终端发送所述第二MAC CE,所述第二MAC CE包括所述LBT持续失败信息。
- 根据权利要求4所述的方法,其特征在于,所述目标操作包括所述LBT恢复,所述免授权调度资源为候选资源集中的全部载波上的资源;所述在所述免授权调度资源上触发LBT持续失败的情况下,执行目标操作,包括:在所述候选资源集的全部BWP上都触发所述LBT持续失败的情况下,向网络设备发送第二LBT持续失败指示。
- 根据权利要求21所述的方法,其特征在于,所述第二LBT持续失败指示承载在无线资源控制RRC信令上。
- 根据权利要求21所述的方法,其特征在于,所述第二LBT持续失败指示包括媒体介入控制MAC层针对层二目标地址或逻辑信道或混合自动重传进程HARQ进程所确定的所述候选资源集。
- 根据权利要求21所述的方法,其特征在于,所述在所述候选资源集的全部BWP上都触发所述LBT持续失败的情况下,向网络设备发送第二LBT持续失败指示之后,还包括:接收所述网络设备为所述侧行链路传输配置的传输资源。
- 根据权利要求21所述的方法,其特征在于,所述方法还包括:在所述候选资源集的全部BWP上都触发所述LBT持续失败的情况下,所述第一终端的MAC层向RRC层传输第三LBT持续失败指示;所述在所述候选资源集的全部BWP上都触发所述LBT持续失败的情况下,向网络设备发送第二LBT持续失败指示,包括:在所述RRC层接收到所述MAC层发送的所述第三LBT持续失败指示的情况下,所述RRC层通过RRC信令向所述网络设备发送所述第二LBT持续失败指示。
- 根据权利要1至3任一所述的方法,其特征在于,所述第一终端的候选资源集包括所述免授权调度资源,所述候选资源集包括所述第一终端针对层二目标地址或逻辑信道或HARQ进程确定的资源集合。
- [根据细则91更正 23.08.2021]
一种侧行通信方法,其特征在于,应用于侧行链路传输的第二终端中,所述方法包括:接收第一终端发送的先听后说LBT持续失败消息,所述LBT持续失败消息是所述第一终端在免授权调度资源上触发LBT持续失败后发送的;触发无线链路失败RLF。 - 根据权利要求27所述的方法,其特征在于,所述LBT持续失败消息包括第一LBT持续失败指示和/或LBT持续失败信息;其中,所述LBT持续失败信息包括LBT失败载波、或LBT失败BWP、LBT失败载波集合、LBT失败BWP集合、目标切换载波、目标切换BWP、目标选择载波、目标选择BWP中的至少一种。
- 根据权利要求28所述的方法,其特征在于,所述LBT持续失败消息包括所述目标切换载波或所述目标切换BWP;所述方法还包括:响应所述LBT持续失败消息,启动第二LBT定时器;所述触发无线链路失败RLF,包括:在所述第二LBT定时器超时,且未接收到所述第一终端在目标传输资源上发送的侧行链路传输数据的情况下,触发所述RLF;其中,所述目标传输资源包括所述目标切换载波、所述目标切换BWP、默认授权载波中的至少一种。
- 根据权利要求29所述的方法,其特征在于,所述方法还包括:接收网络设备为所述第二终端配置的所述第二LBT定时器。
- 根据权利要求28所述的方法,其特征在于,所述LBT持续失败消息不包括所述目标切换载波或所述目标切换BWP;所述触发无线链路失败RLF,包括:响应所述LBT持续失败消息,触发所述RLF。
- 根据权利要求28所述的方法,其特征在于,所述LBT持续失败消息包括所述第一LBT持续失败指示和所述LBT持续失败信息;所述接收第一终端发送的先听后说LBT持续失败消息,包括:接收所述第一终端发送的第一MAC CE,所述第一MAC CE承载有所述第一LBT持续失败指示;所述方法还包括:响应所述第一MAC CE,启动第一LBT定时器,所述第一LBT定时器是网络设备为所述第二终端配置的;在所述第一LBT定时器超时,且未接收到所述第一终端发送的侧行链路传输数据的情况下,向所述第一终端调度侧行授权资源;其中,所述侧行授权资源用于发送所述LBT持续失败信息。
- 一种侧行通信方法装置,其特征在于,用于实现侧行链路传输的第一终端,所述装置包括:LBT模块,用于在免授权调度资源上执行先听后说LBT;执行模块,用于在所述免授权调度资源上触发LBT持续失败的情况下,执行目标操作。
- 根据权利要求33所述的装置,其特征在于,所述装置还包括:MAC模块,用于所述第一终端的媒体接入控制MAC层接收物理层PHY传输的所述免授权调度资源的LBT失败指示;所述MAC模块,用于所述MAC层启动或重新启动LBT失败检测定时器,将LBT失败计数增加1;所述MAC模块,用于在所述LBT失败计数大于或等于LBT检测次数门限的情况下,所述MAC层确定在所述免授权调度资源上触发所述LBT持续失败。
- 根据权利要求34所述的装置,其特征在于,所述LBT检测次数门限和所述LBT失败检测定时器是网络设备为所述第一终端配置的。
- 根据权利要求33至35任一所述的装置,其特征在于,所述目标操作包括频点切换、发送失败消息和LBT恢复中的至少一种。
- 根据权利要求36所述的装置,其特征在于,所述目标操作包括所述频点切换,所述第一终端的候选资源集包括第一载波上的所述免授权调度资源和第二载波上的资源;所述执行模块包括重选子模块;所述LBT模块,用于在所述第一载波的带宽部分BWP上执行LBT;所述重选子模块,用于在所述第一载波的BWP上触发所述LBT持续失败的情况下,从所述第二载波中选择资源进行所述侧行链路传输。
- 根据权利要求37所述的装置,其特征在于,所述重选子模块,用于在所述第二载波为免授权载波的情况下,在所述第二载波的BWP上执行LBT;在所述第二载波的BWP上触发LBT成功的情况下,在所述第二载波上选择可用资源进行所述侧行链路传输;或,所述重选子模块,用于在所述第二载波为授权载波的情况下,在所述第二载波上选择所述可用资源进行所述侧行链路传输。
- 根据权利要求36所述的装置,其特征在于,所述目标操作包括所述频点切换,所述第一终端的候选资源集包括第一BWP上的所述免授权调度资源和第二BWP上的资源;所述执行模块包括重选子模块;所述LBT模块,用于在所述第一BWP上执行LBT;所述重选子模块,用于在所述第一BWP上触发所述LBT持续失败的情况下,从所述第二BWP中选择资源进行所述侧行链路传输;其中,所述第一BWP为第一载波上的BWP,所述第二BWP为所述第一载波或第二载波上的BWP。
- 根据权利要求39所述的装置,其特征在于,所述重选子模块,用于在所述第二BWP所属的载波为免授权载波的情况下,在所述第二BWP上执行LBT;在所述第二BWP上触发LBT成功的情况下,在所述第二BWP上选择可用资源进行所述侧行链路 传输;或,所述重选子模块,用于在所述第二BWP所属的载波为授权载波的情况下,在所述第二BWP上选择可用资源进行所述侧行链路传输。
- 根据权利要求36所述的装置,其特征在于,所述目标操作包括所述发送失败消息,所述侧行链路传输还包括第二终端;所述执行模块包括发送子模块;所述发送子模块,用于在所述免授权调度资源上触发LBT持续失败的情况下,向所述第二终端发送LBT持续失败消息,所述LBT持续失败消息包括第一LBT持续失败指示和/或LBT持续失败信息;其中,所述LBT持续失败信息包括LBT失败载波、LBT失败BWP、LBT失败载波集合、LBT失败BWP集合、目标切换载波、目标切换BWP、目标选择载波、目标选择BWP中的至少一种。
- 根据权利要求41所述的装置,其特征在于,所述LBT持续失败消息承载在媒体接入控制单元MAC CE上。
- 根据权利要求42所述的装置,其特征在于,所述LBT持续失败消息包括所述第一LBT持续失败指示和所述LBT持续失败信息;所述第一LBT持续失败指示承载在第一MAC CE上,所述LBT持续失败信息承载在第二MAC CE上;或,所述第一LBT持续失败指示和所述LBT持续失败信息承载在第三MAC CE上。
- 根据权利要求41所述的装置,其特征在于,所述发送子模块,用于在存在所述侧行链路传输的可用资源的情况下,在所述侧行链路传输的可用资源上向所述第二终端发送所述LBT持续失败消息。
- 根据权利要求41所述的装置,其特征在于,所述装置还包括:所述发送子模块,用于在不存在所述侧行链路传输的可用资源的情况下,向网络设备发送LBT请求协助;第一接收模块,用于接收所述网络设备通过信道占用时长COT共享为所述第一终端配置的辅助免授权调度资源,所述辅助免授权调度资源包括所述网络设备辅助执行LBT得到的可用资源;所述发送子模块,用于在所述辅助免授权调度资源上向所述第二终端发送所述LBT持续失败消息。
- 根据权利要求45所述的装置,其特征在于,所述LBT请求协助承载在侧行链路-缓存状态报告SL-BSR或无线资源控制RRC消息中。
- 根据权利要求41所述的装置,其特征在于,所述发送子模块,用于在不存在所述侧行链路传输的可用资源的情况下,通过默认授权载波上配置的候选资源池向所述第二终端发送所述LBT持续失败消息。
- 根据权利要求47所述的装置,其特征在于,所述候选资源池为模式2的候选资源池。
- 根据权利要求47所述的装置,其特征在于,对于所述第一终端的单播业务,所述默认授权载波是所述第一终端与第二终端建立连接时通过PC5-RRC消息协商确定的。
- 根据权利要求47所述的装置,其特征在于,对于所述第一终端的单播、组播或广播业务,所述默认授权载波是网络设备配置的。
- 根据权利要求47所述的装置,其特征在于,在所述第一终端处于单播、组播或广播的状态下,所述默认授权载波是网络设备基于层二目标地址、服务质量QoS或逻辑信道配置的。
- 根据权利要求43所述的装置,其特征在于,所述第一LBT持续失败指示承载在所述第一MAC CE上,所述LBT持续失败信息承载在所述第二MAC CE上;所述装置还包括:第一接收模块,用于接收所述第二终端为所述第一终端调度的侧行授权资源,所述侧行授权资源是所述第二终端在第一LBT定时器超时且未接收到所述第一终端发送的侧行链路传输数据的情况下为所述第一终端调度的,所述第一LBT定时器是在所述第二终端接收到所述第一MAC CE时启动的;所述发送子模块,用于向所述第二终端发送所述第一MAC CE,所述第一MAC CE包括所述第一LBT持续失败指示;所述发送子模块,用于在所述侧行传输资源上向所述第二终端发送所述第二MAC CE,所述第二MAC CE包括所述LBT持续失败信息。
- 根据权利要求36所述的装置,其特征在于,所述目标操作包括所述LBT恢复,所述免授权调度资源为候选资源集中的全部载波上的资源;所述执行模块包括:发送子模块;所述发送子模块,用于在所述候选资源集的全部BWP上都触发所述LBT持续失败的情况下,向网络设备发送第二LBT持续失败指示。
- 根据权利要求53所述的装置,其特征在于,所述第二LBT持续失败指示承载在无线资源控制RRC信令上。
- 根据权利要求53所述的装置,其特征在于,所述第二LBT持续失败指示包括媒体介入控制MAC层针对层二目标地址或逻辑信道或混合自动重传进程HARQ进程所确定的所述候选资源集。
- 根据权利要求53所述的装置,其特征在于,所述装置还包括:第一接收模块,用于接收所述网络设备为所述侧行链路传输配置的传输资源。
- 根据权利要求53所述的装置,其特征在于,所述装置还包括:MAC模块,用于在所述候选资源集的全部BWP上都触发所述LBT持续失败的情况下,所述第一终端的MAC层向RRC层传输第三LBT持续失败指示;所述发送子模块,用于在所述RRC层接收到所述MAC层发送的所述第三LBT持续失败指示的情况下,所述RRC层通过RRC信令向所述网络设备发送所述第二LBT持续失败指示。
- 根据权利要33至35任一所述的装置,其特征在于,所述第一终端的候选资源集包括所述免授权调度资源,所述候选资源集包括所述第一终端针对层二目标地址或逻辑信道或HARQ进程确定的资源集合。
- 一种侧行通信方法装置,其特征在于,用于实现侧行链路传输的第二终端,所述装置包括:第二接收模块,用于接收第一终端发送的先听后说LBT持续失败消息,所述LBT持续失败消息是所述第一终端在免授权调度资源上触发LBT持续失败后发送的;触发模块,用于触发无线链路失败RLF。
- 根据权利要求59所述的装置,其特征在于,所述LBT持续失败消息包括第一LBT持续失败指示和/或LBT持续失败信息;其中,所述LBT持续失败信息包括LBT失败载波、或LBT失败BWP、LBT失败载波集合、LBT失败BWP集合、目标切换载波、目标切换BWP、目标选择载波、目标选择BWP中的至少一种。
- 根据权利要求60所述的装置,其特征在于,所述LBT持续失败消息包括所述目标切换载波或所述目标切换BWP;所述装置还包括:定时模块,用于响应所述LBT持续失败消息,启动第二LBT定时器;所述触发模块,用于在所述第二LBT定时器超时,且未接收到所述第一终端在目标传输资源上发送的侧行链路传输数据的情况下,触发所述RLF;其中,所述目标传输资源包括所述目标切换载波、所述目标切换BWP、默认授权载波中的至少一种。
- 根据权利要求61所述的装置,其特征在于,所述第二接收模块,用于接收网络设备为所述第二终端配置的所述第二LBT定时器。
- 根据权利要求60所述的装置,其特征在于,所述LBT持续失败消息不包括所述目标切换载波或所述目标切换BWP;所述触发模块,用于响应所述LBT持续失败消息,触发所述RLF。
- 根据权利要求60所述的装置,其特征在于,所述LBT持续失败消息包括所述第一LBT持续失败指示和所述LBT持续失败信息;所述装置还包括:所述第二接收模块,用于接收所述第一终端发送的第一MAC CE,所述第一MAC CE承载有所述第一LBT持续失败指示;定时模块,用于响应所述第一MAC CE,启动第一LBT定时器,所述第一LBT定时器是网络设备为所述第二终端配置的;调度模块,用于在所述第一LBT定时器超时,且未接收到所述第一终端发送的侧行链路传输数据的情况下,向所述第一终端调度侧行授权资源;其中,所述侧行授权资源用于发送所述LBT持续失败信息。
- 一种终端,其特征在于,所述终端包括:处理器和与所述处理器相连的收发器;其中,所述处理器,用于在免授权调度资源上执行先听后说LBT;所述处理器,用于在所述免授权调度资源上触发LBT持续失败的情况下,执行目标操作。
- 一种终端,其特征在于,所述终端包括:处理器和与所述处理器相连的收发器;其中,所述收发器,用于接收第一终端发送的先听后说LBT持续失败消息,所述LBT持续失败消息是所述第一终端在免授权调度资源上触发LBT持续失败后发送的;所述处理器,用于触发无线链路失败RLF。
- [根据细则91更正 23.08.2021]
一种计算机可读存储介质,其特征在于,所述可读存储介质中存储有可执行指令,所述可执行指令由处理器加载并执行以实现如权利要求1至32任一所述的侧行通信方法。 - [根据细则91更正 23.08.2021]
一种芯片,其特征在于,所述芯片包括可编程逻辑电路或程序,所述芯片用于实现如权利要求1至32中任一所述的侧行通信方法。
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| EP21952167.1A EP4355010A4 (en) | 2021-08-02 | 2021-08-02 | METHOD AND DEVICE FOR SIDELINK COMMUNICATION AS WELL AS DEVICE AND STORAGE MEDIUM |
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| WO2024160061A1 (zh) * | 2023-02-01 | 2024-08-08 | 华为技术有限公司 | 一种通信方法及装置 |
| WO2024229769A1 (zh) * | 2023-05-10 | 2024-11-14 | 北京小米移动软件有限公司 | 一种侧行链路连续先听后说失败的处理方法及其装置 |
| WO2025001604A1 (zh) * | 2023-06-30 | 2025-01-02 | 大唐移动通信设备有限公司 | 一致性先听后说失败处理方法、装置及终端 |
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| US20240147533A1 (en) | 2024-05-02 |
| CN117652199A (zh) | 2024-03-05 |
| EP4355010A1 (en) | 2024-04-17 |
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