WO2021004136A1 - 组播反馈资源确定方法及装置、存储介质、用户设备 - Google Patents

组播反馈资源确定方法及装置、存储介质、用户设备 Download PDF

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Publication number
WO2021004136A1
WO2021004136A1 PCT/CN2020/087111 CN2020087111W WO2021004136A1 WO 2021004136 A1 WO2021004136 A1 WO 2021004136A1 CN 2020087111 W CN2020087111 W CN 2020087111W WO 2021004136 A1 WO2021004136 A1 WO 2021004136A1
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Prior art keywords
resource
user equipment
location
available feedback
available
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PCT/CN2020/087111
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English (en)
French (fr)
Inventor
邓云
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展讯通信（上海）有限公司
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Application filed by 展讯通信（上海）有限公司 filed Critical 展讯通信（上海）有限公司
Priority to US17/624,711 priority Critical patent/US20220248414A1/en
Priority to EP20836234.3A priority patent/EP3998798A4/en
Priority to KR1020227003672A priority patent/KR102621426B1/ko
Priority to JP2022500692A priority patent/JP7524297B2/ja
Publication of WO2021004136A1 publication Critical patent/WO2021004136A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/121—Wireless traffic scheduling for groups of terminals or users
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0226—Traffic management, e.g. flow control or congestion control based on location or mobility
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/08—User group management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]

Definitions

  • the present invention relates to the field of communication technology, in particular to a method and device for determining multicast feedback resources, a storage medium, and user equipment.
  • the Long Term Evolution (LTE) system introduced direct communication (ProSe Direct Communication).
  • UE User Equipment
  • direct communication there are two modes of resource allocation, one is scheduled resource allocation, which is configured by the base station through dedicated signaling; the other is automatic resource selection,
  • the base station can provide the UE with a resource pool for direct communication through system messages or radio resource control (Radio Resource Control, RRC) signaling, and the UE selects resources for direct communication from the resource pool. If the transmitting UE (Transmitter UE) is not within the network coverage, the UE adopts an automatic resource selection method to select resources for direct communication from a pre-configured resource pool.
  • RRC Radio Resource Control
  • the 3rd Generation Partnership Project 3rd Generation Partnership Project, 3GPP also supports the Internet of Vehicles (Vehicle-to-Everything, V2X).
  • V2X Vehicle-to-Everything
  • a certain UE sends V2X messages to multiple UEs. It should be noted that both the receiving UE and the sending UE may not be within the network coverage, or some UEs may be within the network coverage.
  • NR V2X can use unicast, groupcast, or broadcast to transmit V2X services.
  • the UE uses unicast or groupcast to transmit, feedback can be introduced.
  • There is no exact solution for how to receive UE feedback that is, which feedback resource is used to send feedback information to the transmitting UE.
  • 3GPP agrees to adopt Hybrid Automatic Repeat reQuest (HARQ) feedback for Groupcast, or HARQ feedback is not used.
  • HARQ feedback is applied, one way is to allow group members to use independent feedback resources, that is, independent Physical Sidelink Feedback Channel (PSFCH) resources.
  • PSFCH Physical Sidelink Feedback Channel
  • the Transmit UE can determine whether to perform Groupcast with feedback according to the quality of service parameters of the multicast service and the parameters of the network configuration. For example, the base station can associate the feedback resources at the same time when configuring the transmission resource pool, because Rx is considered.
  • the processing delay of the UE For example, when receiving user equipment (Receive UE, Rx UE) receives V2X data sent by Tx UE in time slot n, it needs a certain processing time to decode the received signal to determine whether the data is received accurately.
  • time slot n For accurate reception, at some time after time slot n, such as time slot n+k, use PSFCH for feedback, and feedback acknowledgement (Acknowledgement, ACK); if it is not received accurately, use PSFCH to feedback negative acknowledgement ( Negative-Acknowledgment, NACK).
  • ACK feedback acknowledgement
  • NACK Negative-Acknowledgment
  • the technical problem solved by the present invention is how to determine the feedback resource used when the receiving user equipment feeds back the multicast data receiving state.
  • the method for determining multicast feedback resources includes: receiving side link control information and transmission data from a transmission user equipment, and the transmission user equipment uses The multicast mode sends the side link control information and the transmission data to other user equipment in the same group as the transmitting user equipment; at least according to the side link control information, each user equipment used by each receiving user equipment is determined
  • the location of available feedback resources, the side link control information can directly or indirectly indicate the location of each available feedback resource, the receiving user equipment and the transmitting user equipment are in the same group; according to their own group ID and group ID
  • the first preset mapping relationship with the available feedback resources determines the currently available feedback resources.
  • the side link control information can indicate the location of the first available feedback resource and the resource interval, and the determination of the amount of each available feedback resource used by each receiving user equipment according to the side link control information
  • the location includes: determining the location of each available feedback resource according to the location of the first available feedback resource and the resource interval.
  • the side link control information can indicate a resource interval
  • the determining the location of each available feedback resource for each receiving user equipment at least according to the side link control information includes: determining to carry the transmission The location of the first physical resource block of the data transmission resource; the location of the first available feedback resource is determined according to the location of the first physical resource block and a second preset mapping relationship, and the second preset mapping relationship represents The mapping relationship between the location of the first physical resource block and the location of the first available feedback resource; the location of each available feedback resource is determined according to the location of the first available feedback resource and the resource interval.
  • the side link control information can indicate a resource interval
  • the determining, at least according to the side link control information, the location of each available feedback resource for use by each receiving user equipment includes: determining to carry the side link The location of the physical resource block of the side link control information; the location of the first available feedback resource is determined according to the location of the physical resource block and the third preset mapping relationship, and the third preset mapping relationship indicates that the side The mapping relationship between the location of the physical resource block of the side link control information and the location of the first available feedback resource; the location of each available feedback resource is determined according to the location of the first available feedback resource and the resource interval.
  • the side link control information can indicate the location of the first available feedback resource
  • the determining at least the location of each available feedback resource for use by each receiving user equipment according to the side link control information includes : Determine the number of available feedback resources through cell system messages; determine the resource interval according to the number of received user equipment in the group and the number of available feedback resources; determine each according to the location of the first available feedback resource and the resource interval Location of available feedback resources.
  • the determining the number of available feedback resources through the cell system message includes: if the current receiving user equipment and the transmitting user equipment belong to different cells, obtaining the neighboring cell's V2X resource configuration information from the neighboring cell in the cell system message. The number of available feedback resources in the cell.
  • the side link control information can indicate the location of the first available feedback resource and the number of available feedback resources.
  • the side link control information determines the available feedback resources for each receiving user equipment.
  • the location of the feedback resource includes: determining the resource interval according to the number of receiving user equipment in the group and the number of the available feedback resources; and determining the location of each available feedback resource according to the location of the first available feedback resource and the resource interval.
  • the number of available feedback resources is equal to the number of receiving user equipments
  • the first preset mapping relationship indicates that there is a corresponding relationship between the group identifiers with the same order and the available feedback resources
  • the group identifier and the The first preset mapping relationship between group identifiers and available feedback resources to determine the currently available feedback resources includes: sorting all the group identifiers in the same group, and determining the sequence numbers in all the group identifiers of the own group identifier; Each available feedback resource is sorted according to the position of the available feedback resource, and the available feedback resource with the serial number is determined; the available feedback resource with the serial number is determined to be the same as the currently available feedback resource.
  • the side link control information can indicate whether the available feedback resources are continuous, and after receiving the side link control information from the transmitting user equipment and the transmission data, the method further includes: according to the side link control information It is determined whether the available feedback resources are continuous, and the mapping relationship of the available feedback resources includes continuous mapping and interleaving mapping.
  • the transmitting user equipment determines whether the available feedback resources are continuous through a system message or RRC signaling of the serving base station.
  • the available feedback resource is a PSFCH resource.
  • the embodiment of the present invention also discloses a multicast feedback resource determination device.
  • the multicast feedback resource determination device includes: a receiving module for receiving side link control information and transmission data from the transmission user equipment , The transmission user equipment uses a multicast method to send the side link control information and the transmission data to other user equipment in the same group as the transmission user equipment; and feeds back the resource location determination module to at least according to the
  • the side link control information determines the location of each available feedback resource used by each receiving user equipment.
  • the side link control information can directly or indirectly indicate the location of each available feedback resource.
  • the receiving user equipment and the transmitting user The devices are in the same group; the feedback resource determining module is used to determine the currently available feedback resource according to its own in-group identifier and the first preset mapping relationship between the in-group identifier and the available feedback resource.
  • the embodiment of the present invention also discloses a storage medium on which computer instructions are stored, and the steps of the multicast feedback resource determination method are executed when the computer instructions are run.
  • the embodiment of the present invention also discloses a user equipment, which includes a memory and a processor.
  • the memory stores computer instructions that can run on the processor.
  • the processor executes the group when the computer instructions are executed. Broadcast feedback resource determination method.
  • the transmitting user equipment can directly or indirectly indicate the location of each available feedback resource through the side link control information. Therefore, the receiving user equipment can determine the location of each available feedback resource at least according to the side link control information. position.
  • there is a first preset mapping relationship between the group identifiers of the receiving user equipment in the same group and the available feedback resources and each receiving user equipment can determine its current available feedback resources according to its own group identifier and the first mapping relationship. .
  • the technical scheme of the present invention avoids that when the number of group members is unknown, the network configures independent feedback resources for each data transmission resource (such as PSSCH resource), which results in waste of feedback resources or insufficient feedback resources.
  • the technical solution of the present invention can enable the feedback resources used by different receiving user equipments to be scattered and occupy the entire feedback resource pool, thereby achieving load balancing.
  • the side link control information can indicate the location of the first available feedback resource and the resource interval
  • the receiving user equipment can determine the location of each available feedback resource according to the location of the first available feedback resource and the resource interval.
  • FIG. 1 is a flowchart of a method for determining multicast feedback resources according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a specific implementation of step S102 shown in FIG. 1;
  • FIG. 3 is a flowchart of another specific implementation manner of step S102 shown in FIG. 1;
  • step S102 shown in FIG. 1;
  • FIG. 5 is a flowchart of a specific implementation of step S103 shown in FIG. 1;
  • Fig. 6 is a schematic structural diagram of an apparatus for determining multicast feedback resources according to an embodiment of the present invention.
  • the transmitting user equipment can directly or indirectly indicate the location of each available feedback resource through the side link control information. Therefore, the receiving user equipment can determine the location of each available feedback resource at least according to the side link control information. position.
  • there is a first preset mapping relationship between the group identifiers of the receiving user equipment in the same group and the available feedback resources and each receiving user equipment can determine its current available feedback resources according to its own group identifier and the first mapping relationship. .
  • the technical solution of the present invention avoids that the network configures independent feedback resources for each data transmission resource (such as PSSCH resource) when the number of group members is not known, resulting in waste of feedback resources or insufficient feedback resources.
  • the technical solution of the present invention can enable the feedback resources used by different receiving user equipments to occupy the entire feedback resource pool in a distributed manner, thereby achieving load balancing.
  • the user equipment in this embodiment is all user equipment that supports V2X, for example, user equipment that supports 5G V2X.
  • the transmission data in this embodiment may be V2X data.
  • the available feedback resources in this embodiment may be PSFCH resources.
  • Fig. 1 is a flowchart of a method for determining multicast feedback resources according to an embodiment of the present invention.
  • the method for determining multicast feedback resources may include the following steps:
  • Step S101 Receive side link control information and transmission data from a transmission user equipment, and the transmission user equipment uses a multicast method to send the side link control information to other user equipment in the same group as the transmission user equipment And the transmission data;
  • Step S102 Determine the location of each available feedback resource for use by each receiving user equipment at least according to the side link control information.
  • the side link control information can directly or indirectly indicate the location of each available feedback resource, and receive The user equipment and the transmitting user equipment are in the same group;
  • Step S103 Determine the currently available feedback resource according to its own group identifier and the first preset mapping relationship between the group identifier and the available feedback resource.
  • sequence number of each step in this embodiment does not represent a limitation on the execution order of each step.
  • the members of a group are pre-configured, such as the composition of the operator management group, including the number of members and the group identification of each member; it may also be a temporary composition
  • the group also includes the number of group members and the group identification of each member. This patent does not limit the specific group formation method.
  • the method for determining multicast feedback resources in this embodiment may be used on the receiving user equipment (ReceiverUE, Rx UE) side.
  • the transmitting user equipment (TransmitterUE, Tx UE) is a UE that sends V2X data
  • the Rx UE is a UE that receives V2X data.
  • the Rx UE and the Tx UE are in the same group, and UEs in the same group can transmit V2X data to each other in a multicast manner.
  • each UE in the same group it can learn the number of members in the group. For example, there are 6 UEs in group 1 (Group1), UE1 is Tx UE, UE2-UE6 are Rx UEs, UE1-UE6 can know that there are 6 UEs in group 1, and they are divided into one Tx UE and 5 Rx UEs.
  • group 1 Group1
  • UE1 is Tx UE
  • UE2-UE6 are Rx UEs
  • UE1-UE6 can know that there are 6 UEs in group 1, and they are divided into one Tx UE and 5 Rx UEs.
  • the Tx UE transmits side link control information (Sidelink Control Information, SCI) through a physical side link control channel (Physical Sidelink Control Channel, PSCCH).
  • SCI can indicate the position of the side link shared channel (Physical Sidelink Shared Channel, PSSCH) and parameters such as modulation and coding format.
  • the Rx UE receives the SCI, determines the position of the PSSCH through the SCI, and receives V2X data from the PSSCH.
  • each Rx UE can at least determine the location of each Rx according to the SCI. The location of each available feedback resource used by the UE.
  • the Rx UE can directly determine the location of each available feedback resource based on the SCI. If the SCI indirectly indicates the location of each available feedback resource, the Rx UE can determine the location of each available feedback resource by calculation in combination with other known parameters.
  • the UEs in each group have group IDs.
  • group IDs or numbers
  • the group IDs are 1, 2, 3, 4, 5 and 6.
  • Tx UE is a UE with ID 1
  • UEs with IDs 2, 3, 4, 5 and 6 are Rx UEs
  • Tx UE is a UE with ID 2
  • UEs with IDs 1, 3, 4, 5 and 6 It is Rx UE, and the rest of the scenarios are analogized.
  • the Tx UE can be identified from the received SCI and the received V2X data.
  • the Rx UE can be used according to its own The identifier in the group and the first preset mapping relationship between the identifier in the group and the available feedback resource determine the currently available feedback resource.
  • the available feedback resources are the 3rd, 6th, 9th, 12th, and 15th PSFCH resources in the PSFCH resource pool.
  • the Tx UE ID is 1
  • the Rx UE IDs are 2, 3 , 4, 5, and 6, then the identifiers 2, 3, 4, 5, and 6 correspond to the 3rd, 6th, 9th, 12th, and 15th PSFCH resources in the PSFCH resource pool in sequence.
  • the feedback resource used by UE2 is the third PSFCH resource
  • the feedback resource used by UE3 is the sixth PSFCH resource
  • the feedback resource used by UE6 is the 15th PSFCH resource.
  • the currently available feedback resource determined in step S103 is used for the current receiving user equipment to feed back the receiving status of the transmission data. For example, using the currently available feedback resource to feed back ACK, indicating that the transmission data is successfully received; using the currently available feedback resource to feed back NACK, indicating that the transmission data is not Received successfully.
  • the embodiment of the present invention avoids that the network configures independent feedback resources for each data transmission resource (such as PSSCH resource) when the number of group members is unknown, resulting in waste of feedback resources or insufficient feedback resources.
  • the technical solution of the present invention can enable the feedback resources used by different receiving user equipments to occupy the entire feedback resource pool in a distributed manner, thereby achieving load balancing.
  • the side link control information can indicate the location of the first available feedback resource and the resource interval.
  • Step S102 shown in FIG. 1 may include the following steps: according to the first The location of each available feedback resource and the resource interval determine the location of each available feedback resource.
  • the Tx UE can indicate the position of the first available feedback resource and the resource interval in the SCI.
  • the position of an available feedback resource is the third PSFCH resource in the PSFCH resource pool, and the resource interval is 2.
  • the Rx UE can determine the total number of available feedback resources and determine the specific location of each available feedback resource according to the instructions of the SCI. For example, the total number of Rx UEs in the group is 5, the Rx UE can determine that each available feedback resource is the 3rd, 6th, 9th, 12th, and 15th PSFCH resources in the PSFCH resource pool. Then, the PSFCH resource used by each Rx UE is determined according to the group identifier. For example, the PSFCH resource of each Rx UE can be determined in sequence according to the order of the Rx UE group identifier.
  • the embodiments of the present invention not only enable each receiving user equipment to determine its available feedback resources, but also avoid the generation of available feedback resources among receiving user equipment in different groups. conflict.
  • the resource interval is 1, that is, when the feedback resources corresponding to the UEs in the group are received continuously, the resource interval may not be indicated, that is, the default value of the resource interval is 1, and when the default value is adopted, it may not be indicated in the SCI.
  • the side link control information can indicate the resource interval. Please refer to FIG. 2.
  • Step S102 shown in FIG. 1 may include the following steps:
  • Step S201 Determine the position of the first physical resource block of the transmission resource carrying the transmission data
  • Step S202 Determine the location of the first available feedback resource according to the location of the first physical resource block and a second preset mapping relationship, where the second preset mapping relationship represents the location of the first physical resource block and the location State the mapping relationship of the location of the first available feedback resource;
  • Step S203 Determine the location of each available feedback resource according to the location of the first available feedback resource and the resource interval.
  • the Tx UE may only indicate the resource interval in the SCI.
  • the Rx UE also needs to know the location of the first available feedback resource.
  • the mapping relationship between the location of the first available feedback resource and the known parameters, such as the location of the first physical resource block carrying the transmission resource of the transmission data, can be configured in advance.
  • the transmission resource for example, PSSCH is usually consecutive physical resource blocks
  • the second preset mapping relationship may indicate the mapping relationship between the position of the first physical resource block of the PSSCH and the position of the first available PSFCH feedback resource .
  • the location of the first physical resource block may be represented by the index of the first physical resource block.
  • the third preset mapping relationship may indicate the mapping relationship between the location of the physical resource block bearing the SCI and the location of the first available PSFCH feedback resource.
  • the Rx UE can determine the location of the first available PSFCH feedback resource according to the location of the physical resource block carrying the SCI and the third preset mapping relationship.
  • both PSSCH and SCI refer to the PSSCH and SCI when the Rx UE receives V2X data from the Tx UE.
  • the Rx UE can detect the SCI and PSSCH sent by multiple Tx UEs, but only receives the Tx that it is interested in.
  • the SCI and PSSCH sent by the UE such as receiving V2X data sent by the same group of UEs.
  • the Rx UE can calculate and determine the location of the first available feedback resource, and combined with the resource interval in the SCI, can determine the location of each available feedback resource.
  • the side link control information can indicate the location of the first available feedback resource. Please refer to FIG. 3.
  • Step S102 shown in FIG. 1 may include the following steps:
  • Step S301 Determine the number of available feedback resources through the cell system message
  • Step S302 Determine the resource interval according to the number of receiving user equipments in the group and the number of available feedback resources;
  • Step S303 Determine the location of each available feedback resource according to the location of the first available feedback resource and the resource interval.
  • the Tx UE may only indicate the location of the first available feedback resource in the SCI. In order for the Rx UE to determine each available feedback resource, it also needs to know the resource interval. In this case, the UE can be notified in advance of the number of available feedback resources, so that the UE can calculate the resource interval.
  • the calculated resource interval in this embodiment is a positive integer.
  • the base station can notify the UE of the total number of feedback resources in the feedback resource pool through a system message. Since the Rx UE knows the number of Rx UEs in the group, the resource interval can be calculated. Specifically, the resource interval INT(N/M) can be calculated using the following formula, where N represents the total number of feedback resources in the feedback resource pool, M represents the number of Rx UEs in the group, and INT() represents the rounding function. Round up or down.
  • the Tx UE and the Rx UE may be located in the same cell or in different cells.
  • step S301 shown in FIG. 3 may include the following steps: if the current receiving user equipment and the transmitting user equipment belong to different cells, obtaining the V2X resource configuration information of the neighboring cell in the cell system message The number of feedback resources available.
  • the cell system message includes the V2X resource configuration information of the neighboring cell, and the V2X resource configuration information of the neighboring cell includes the number of available feedback resources in the neighboring cell.
  • Tx UEs and some Rx UEs are located in Cell 1, and this portion of Rx UEs can learn the number of PSFCH resources through the system message of the current cell; the remaining Rx UEs in the group are in the neighboring cell Cell 2, and the remaining Rx UEs Some Rx UEs can receive system messages from the cell Cell2.
  • the system messages indicate the V2X resource configuration of the neighboring cell Cell1, which includes the number of PSFCH resources configured by the cell Cell1.
  • the Rx UE located in the cell Cell2 can learn that the Tx UE is located in the cell Cell1 by receiving the SCI and PSSCH sent by the Tx UE.
  • the Rx UE learns the number of PSFCH resources corresponding to the Groupcast transmitted by the Tx UE according to the configuration parameters of the system message. Then the Rx UE determines the PSFCH resource interval according to the number of members of the group. As mentioned earlier, there are 6 members in this group, and the number of Rx UEs is 5. If the total number of PSFCH resources (that is, the number of PSFCH resources corresponding to the Groupcast transmission resource pool configured by Cell1) is N, then Take the resource interval as INT (N/5), and the value is an integer. In this way, the Rx UE can determine all available PSFCH resources in turn, and then, according to the identity in the group, each member obtains the PSFCH resources used by itself.
  • the Tx UE indicates whether to use continuous PSFCH mapping or whether to use interleaved PSFCH mapping in the SCI that sends V2X data to the same group of UEs.
  • the SCI can indicate the first available The location of the feedback resource, or the foregoing may be used to determine the location of the first available feedback resource according to the second preset mapping relationship between the position of the PSSCH scheduled by the SCI. After the Rx UE receives the SCI, it can know whether the PSFCH resources are continuous.
  • the UE in the group will obtain the respective PSFCH resources in the order of identification in the group after determining the location of the first available feedback resource; if it is not continuous PSFCH (that is, interleaved PSFCH mapping) mapping, after obtaining the resource interval, determine the respective PSFCH resources by combining the first available feedback resource location and the group identifier.
  • PSFCH that is, interleaved PSFCH mapping
  • the PSFCH resource mapping relationship can be obtained from the system message or RRC signaling, that is, the serving base station of the Tx UE can indicate to the Tx UE whether the PSFCH resource mapping is continuous through the system message or RRC signaling,
  • the serving base station can configure whether the PSFCH resource is continuous according to the transmission resource pool, that is, when the Tx UE adopts the transmission resource in the transmission resource pool, whether the PSFCH resource is continuous is determined by the mapping relationship of the PSFCH resource associated with the resource pool;
  • the serving base station may indicate through RRC signaling whether the PSFCH resources corresponding to the allocated transmission resources for Groupcast transmission are continuous.
  • the side link control information can indicate the location of the first available feedback resource and the number of available feedback resources. Please refer to FIG. 4.
  • Step S102 shown in FIG. 1 may include The following steps:
  • Step S401 Determine the resource interval according to the number of receiving user equipments in the group and the number of available feedback resources;
  • Step S402 Determine the location of each available feedback resource according to the location of the first available feedback resource and the resource interval.
  • the Rx UE can first calculate the resource interval, and then determine each available feedback resource based on the resource interval and the location of the first available feedback resource. The location of the feedback resource. In this case, the system message of the cell where the Rx UE is located does not need to indicate the PSFCH resource related information of the neighboring cell.
  • step S103 shown in FIG. 1 may include the following steps:
  • Step S501 Sort all the in-group identities in the same group, and determine the sequence numbers in all the in-group identities of the own in-group identification;
  • Step S502 Sort each available feedback resource according to the position of the available feedback resource, and determine the available feedback resource with the sequence number;
  • Step S503 Determine the available feedback resource with the sequence number as the currently available feedback resource.
  • the available feedback resources of each Rx UE can be determined according to the corresponding relationship.
  • the members in the group can determine the PSFCH resources used according to their numbers in the group.
  • the numbers in the group are 1, 2, 3, 4, 5, and 6, when the number of Tx UE is 4, the number of Rx UE is 1, 2, 3, 5, and 6, respectively.
  • the available feedback resources are sorted in order: the 3rd, 6th, 9th, 12th, and 15th PSFCH resources.
  • "numbers 1, 2, 3, 5, and 6" correspond to "1st, 3rd, 6th, 9th, 12th, 15th PSFCH resources" respectively.
  • Rx UEs with numbers 1, 2, and 3 use the 3rd, 6th, and 9th PSFCH resources in sequence; for UEs with numbers 5 and 6, the 12th PSFCH resource and 15th PSFCH resource are used in sequence.
  • the PSFCH resources can be determined directly according to the number. If the number of the Tx UE is lower than the number of the Rx UE, the Rx UE subtracts 1 from the number, and then uses the PSFCH resource corresponding to the number minus 1.
  • the numbers in the group are 1, 2, 3, 4, 5, 6, and when the Tx UE is 4, for Rx UE, the UEs with the numbers 1, 2, and 3 use the third, sixth, and ninth in sequence.
  • the embodiment of the present invention also discloses a multicast feedback resource determining device 60.
  • the multicast feedback resource determining device 60 includes a receiving module 601, a feedback resource location determining module 602, and a feedback resource determining module 603.
  • the receiving module 601 is used to receive side link control information and transmission data from the transmission user equipment.
  • the transmission user equipment uses a multicast method to send the side link to other user equipment in the same group as the transmission user equipment.
  • the feedback resource location determination module 602 is configured to determine the location of each available feedback resource for each receiving user equipment at least according to the side link control information, and the side link control
  • the information can directly or indirectly indicate the location of each available feedback resource.
  • the receiving user equipment and the transmitting user equipment are in the same group;
  • the feedback resource determining module 603 is used to determine the position of the available feedback resource according to its own group ID and group ID.
  • a preset mapping relationship determines currently available feedback resources.
  • the embodiment of the present invention avoids that the network configures independent feedback resources for each data transmission resource (such as PSSCH resource) when the number of group members is unknown, resulting in waste of feedback resources or insufficient feedback resources.
  • the technical solution of the present invention can enable the feedback resources used by different receiving user equipments to occupy the entire feedback resource pool in a distributed manner, thereby achieving load balancing.
  • the embodiment of the present invention also discloses a storage medium on which computer instructions are stored, and the computer instructions can execute the steps of the methods shown in FIGS. 1 to 5 when the computer instructions are run.
  • the storage medium may include ROM, RAM, magnetic disk or optical disk, etc.
  • the storage medium may also include non-volatile memory (non-volatile) or non-transitory memory, etc.
  • the embodiment of the present invention also discloses a user equipment, the user equipment may include a memory and a processor, and the memory stores computer instructions that can run on the processor. When the processor runs the computer instructions, the steps of the methods shown in FIGS. 1 to 5 can be executed.
  • the user equipment includes but is not limited to terminal equipment such as mobile phones, computers, and tablets.

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Abstract

一种组播反馈资源确定方法及装置、存储介质、用户设备，组播反馈资源确定方法包括：接收来自传输用户设备的侧边链路控制信息以及传输数据，所述传输用户设备采用组播方式向与所述传输用户设备同组的其他用户设备发送所述侧边链路控制信息以及所述传输数据；至少根据所述侧边链路控制信息确定供各个接收用户设备使用的各个可用反馈资源的位置，所述侧边链路控制信息能够直接或间接地指示各个可用反馈资源的位置，接收用户设备与所述传输用户设备位于同一组；根据自身的组内标识以及组内标识与可用反馈资源的第一预设映射关系确定当前可用反馈资源。本发明技术方案能够确定接收用户设备反馈组播数据接收状态时所采用的反馈资源。

Description

组播反馈资源确定方法及装置、存储介质、用户设备
本申请要求于2019年7月8日提交中国专利局、申请号为201910609888.1、发明名称为“组播反馈资源确定方法及装置、存储介质、用户设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，尤其涉及一种组播反馈资源确定方法及装置、存储介质、用户设备。
背景技术
在协议版本12(Release 12)中，长期演进(Long Term Evolution，LTE)***引入了直接通信(ProSe Direct Communication)。至少两个用户设备(UserEquipment,UE)之间可以通过PC5接口进行直接通信。在直接通信中，有两种模式的资源分配方式，一种是调度资源分配方式(scheduled resource allocation)，这是由基站通过专用信令配置；一种是自动资源选择方式(autonomous resource selection)，基站可以通过***消息或无线资源控制(Radio Resource Control,RRC)信令为UE提供用于直接通信的资源池，UE从资源池中选择用于直接通信的资源。如果传输的UE(Transmitter UE)不在网络覆盖范围内，UE采用自动资源选择方式从预先配置的资源池中选择用于直接通信的资源。基于直接通信，第三代合作伙伴计划(3rd Generation Partnership Project,3GPP)也支持车联网(Vehicle-to-Everything，V2X)。在网络覆盖范围内，某个UE向多个UE发送V2X消息。需要说明的是，接收UE和发送UE均可能不在网络覆盖范围内，或者部分UE在网络覆盖范围之内。
当前，3GPP正在研究在新无线(New Radio，NR)***中引入V2X。因为5G***能够提供更大的带宽、更低的时延，可以更好的满足V2X的业务需求。并且3GPP已经同意NR V2X可以采用单播(unicast)、组播(groupcast)或者广播方式传输V2X业务，当传输UE采用unicast或groupcast时，可以引入反馈。对于接收UE如何反馈，即采用哪个反馈资源向传输UE发送反馈信息还没有确切的解决方案，特别是针对Groupcast，3GPP同意针对Groupcast可以采用混合自动重传请求(HybridAutomatic Repeat reQuest，HARQ)反馈、或者不采用HARQ反馈，当应用HARQ反馈时，一种方式是允许组成员采用独立的反馈资源，即独立的物理侧边链路反馈信道(Physical Sidelink Feedback Channel,PSFCH)资源。
传输用户设备(Transmit UE,Tx UE)可以依据组播业务的服务质量参数以及网络配置的参数确定是否执行有反馈的Groupcast，如基站可以在配置传输资源池时同时关联反馈资源，因为考虑到Rx UE的处理时延，如接收用户设备(Receive UE,Rx UE)在时隙n接收Tx UE发送的V2X数据，需要一定的处理时间对接收的信号进行解码，从而判断是否准确接收了数据，如果准确接收，则在时隙n之后的某个时刻如时隙n+k利用PSFCH进行反馈，反馈确认(Acknowledgement,ACK)；如果没有准确接收，则在时隙n+k利用PSFCH反馈否定应答(Negative-Acknowledgment,NACK)。K的取值协议还没有定，这需要考虑所有支持V2X业务的UE的最小处理时延。
但是，对于groupcast，当Tx UE确定组内的所有成员采用独立的反馈资源进行反馈时，如何确定每个Rx UE的反馈资源，是一个亟待解决的技术问题。
发明内容
本发明解决的技术问题是如何确定接收用户设备反馈组播数据接收状态时所采用的反馈资源。
为解决上述技术问题，本发明实施例提供一种组播反馈资源确定方法，组播反馈资源确定方法包括：接收来自传输用户设备的侧边链路控制信息以及传输数据，所述传输用户设备采用组播方式向与所述传输用户设备同组的其他用户设备发送所述侧边链路控制信息以及所述传输数据；至少根据所述侧边链路控制信息确定供各个接收用户设备使用的各个可用反馈资源的位置，所述侧边链路控制信息能够直接或间接地指示各个可用反馈资源的位置，接收用户设备与所述传输用户设备位于同一组；根据自身的组内标识以及组内标识与可用反馈资源的第一预设映射关系确定当前可用反馈资源。
可选的，所述侧边链路控制信息能够指示第一个可用反馈资源的位置以及资源间隔，所述根据所述侧边链路控制信息确定供各个接收用户设备使用的各个可用反馈资源的位置包括：根据所述第一个可用反馈资源的位置以及资源间隔确定各个可用反馈资源的位置。
可选的，所述侧边链路控制信息能够指示资源间隔，所述至少根据所述侧边链路控制信息确定供各个接收用户设备使用的各个可用反馈资源的位置包括：确定承载所述传输数据的传输资源的首个物理资源块的位置；根据所述首个物理资源块的位置与第二预设映射关系确定第一个可用反馈资源的位置，所述第二预设映射关系表示所述首个物理资源块的位置与所述第一个可用反馈资源的位置的映射关系；根据所述第一个可用反馈资源的位置以及所述资源间隔确定各个可用反馈资源的位置。
可选的，所述侧边链路控制信息能够指示资源间隔，所述至少根据所述侧边链路控制信息确定供各个接收用户设备使用的各个可用反馈资源的位置包括：确定承载所述侧边链路控制信息的物理资源块的位置；根据所述物理资源块的位置与第三预设映射关系确定第一个可用反馈资源的位置，所述第三预设映射关系表示承载所述侧边链路控制信息的物理资源块的位置与所述第一个可用反馈资源的位置的映射关系；根据所述第一个可用反馈资源的位置以及所述资源间隔确定各个可用反馈资源的位置。
可选的，所述侧边链路控制信息能够指示第一个可用反馈资源的位置，所述至少根据所述侧边链路控制信息确定供各个接收用户设备使用的各个可用反馈资源的位置包括：通过小区***消息确定可用反馈资源的数量；根据组内接收用户设备的数量以及所述可用反馈资源的数量确定资源间隔；根据所述第一个可用反馈资源的位置以及所述资源间隔确定各个可用反馈资源的位置。
可选的，所述通过小区***消息确定可用反馈资源的数量包括：如果当前接收用户设备与所述传输用户设备属于不同小区，则通过所述小区***消息中邻小区的V2X资源配置信息获取邻小区中所述可用反馈资源的数量。
可选的，所述侧边链路控制信息能够指示第一个可用反馈资源的位置以及可用反馈资源的数量，所述根据所述侧边链路控制信息确定供各个接收用户设备使用的各个可用反馈资源的位置包括：根据组内接收用户设备的数量以及所述可用反馈资源的数量确定资源间隔；根据所述第一个可用反馈资源的位置以及所述资源间隔确定各个可用反馈资源的位置。
可选的，可用反馈资源的数量与接收用户设备的数量相等，所述第一预设映射关系表示具备相同排序的组内标识与可用反馈资源具备对应关系，所述根据自身的组内标识以及组内标识与可用反馈资源的第一预设映射关系确定当前可用反馈资源包括：对同一组内所有组内标识进行排序，并确定所述自身的组内标识所有组内标识中的序号；对各个可用反馈资源按照可用反馈资源的位置进行排序，并确定具备所述序号的可用反馈资源；将所述具备所述序号的可用反馈资源确定为与所述当前可用反馈资源。
可选的，所述侧边链路控制信息能够指示可用反馈资源是否连续，所述接收来自传输用户设备的侧边链路控制信息以及传输数据之后还包括：根据所述侧边链路控制信息确定可用反馈资源是否连续，所述可用反馈资源的映射关系包括连续映射和交织映射。
可选的，所述传输用户设备通过服务基站的***消息或RRC信令确定可用反馈资源是否连续。
可选的，所述可用反馈资源为PSFCH资源。
为解决上述技术问题，本发明实施例还公开了一种组播反馈资源确定装置，组播反馈资源确定装置包括：接收模块，用以接收来自传输用户设备的侧边链路控制信息以及传输数据，所述传输用户设备采用组播方式向与所述传输用户设备同组的其他用户设备发送所述侧边链路控制信息以及所述传输数据；反馈资源位置确定模块，用以至少根据所述侧边链路控制信息确定供各个接收用户设备使用的各个可用反馈资源的位置，所述侧边链路控制信息能够直接或间接地指示各个可用反馈资源的位置，接收用户设备与所述传输用户设备位于同一组；反馈资源确定模块，用以根据自身的组内标识以及组内标识与可用反馈资源的第一预设映射关系确定当前可用反馈资源。
本发明实施例还公开了一种存储介质，其上存储有计算机指令，所述计算机指令运行时执行所述组播反馈资源确定方法的步骤。
本发明实施例还公开了一种用户设备，包括存储器和处理器，所述存储器上存储有可在所述处理器上运行的计算机指令，所述处理器运行所述计算机指令时执行所述组播反馈资源确定方法的步骤。
与现有技术相比，本发明实施例的技术方案具有以下有益效果：
本发明技术方案中，传输用户设备可以通过侧边链路控制信息直接或间接地指示各个可用反馈资源的位置，由此，接收用户设备可以至少根据侧边链路控制信息确定各个可用反馈资源的位置。此外，处于同一组的接收用户设备的组内标识与可用反馈资源之间具备第一预设映射关系，每个接收用户设备可以根据自身的组内标识以及第一映射关系确定其当前可用反馈资源。本发明技术方案避免了网络在未知组成员数量的情况下，针对每个数据传输资源(如PSSCH资源)均配置独立的反馈资源，导致的反馈资源浪费或反馈资源不足。并且，本发明技术方案能够使得不同接收用户设备使用的反馈资源能够分 散占据整个反馈资源池，实现负载均衡。
进一步地，所述侧边链路控制信息能够指示第一个可用反馈资源的位置以及资源间隔，接收用户设备可以根据第一个可用反馈资源的位置以及资源间隔确定各个可用反馈资源的位置。本发明技术方案通过指示第一个可用反馈资源的位置以及资源间隔，不仅能够使得各个接收用户设备确定其可用的反馈资源，还能够避免不同的组内的接收用户设备之间的可用反馈资源产生冲突。
附图说明
图1是本发明实施例一种组播反馈资源确定方法的流程图；
图2是图1所示步骤S102的一种具体实施方式的流程图；
图3是图1所示步骤S102的另一种具体实施方式的流程图；
图4是图1所示步骤S102的又一种具体实施方式的流程图；
图5是图1所示步骤S103的一种具体实施方式的流程图；
图6是本发明实施例一种组播反馈资源确定装置的结构示意图。
具体实施方式
如背景技术中所述，对于groupcast，当Tx UE确定组内的所有成员采用独立的反馈资源进行反馈时，如何确定每个Rx UE的反馈资源，是一个亟待解决的技术问题。
本发明技术方案中，传输用户设备可以通过侧边链路控制信息直接或间接地指示各个可用反馈资源的位置，由此，接收用户设备可以至少根据侧边链路控制信息确定各个可用反馈资源的位置。此外，处于同一组的接收用户设备的组内标识与可用反馈资源之间具备第一预设映射关系，每个接收用户设备可以根据自身的组内标识以及第一映射关系确定其当前可用反馈资源。本发明技术方案避免了网络在未 知组成员数量的情况下，针对每个数据传输资源(如PSSCH资源)均配置独立的反馈资源，导致的反馈资源浪费或反馈资源不足。并且，本发明技术方案能够使得不同接收用户设备使用的反馈资源能够分散占据整个反馈资源池，实现负载均衡。
本实施例中的用户设备均为支持V2X的用户设备，例如支持5G V2X的用户设备。
本实施例中的传输数据可以是V2X数据。
本实施例中的可用反馈资源可以为PSFCH资源。
为使本发明的上述目的、特征和优点能够更为明显易懂，下面结合附图对本发明的具体实施例做详细的说明。
图1是本发明实施例一种组播反馈资源确定方法的流程图。
所述组播反馈资源确定方法可以包括以下步骤：
步骤S101：接收来自传输用户设备的侧边链路控制信息以及传输数据，所述传输用户设备采用组播方式向与所述传输用户设备同组的其他用户设备发送所述侧边链路控制信息以及所述传输数据；
步骤S102：至少根据所述侧边链路控制信息确定供各个接收用户设备使用的各个可用反馈资源的位置，所述侧边链路控制信息能够直接或间接地指示各个可用反馈资源的位置，接收用户设备与所述传输用户设备位于同一组；
步骤S103：根据自身的组内标识以及组内标识与可用反馈资源的第一预设映射关系确定当前可用反馈资源。
需要指出的是，本实施例中各个步骤的序号并不代表对各个步骤的执行顺序的限定。
本本领域技术人员能够理解的是，一个组内的组员是预先配置好的，如可以是运营商管理组的构成，包括组员数量以及每个成员的组内标识；还可以是临时构成的组，也包括组员数量以及每个成员的组 内标识，本专利不限定具体的组形成的方式。
本实施例中的组播反馈资源确定方法可以用于接收用户设备(ReceiverUE,Rx UE)侧。其中，传输用户设备(TransmitterUE,Tx UE)为发送V2X数据的UE，Rx UE为接收V2X数据的UE。Rx UE与Tx UE处于同一组(Group)，同一组内的UE可以通过组播的方式互相传输V2X数据。
本实施例中，对于同组内的各个UE，其能够获知组内成员的数量。例如，组1(Group1)中共有6个UE，UE1为Tx UE，UE2-UE6为Rx UE，UE1-UE6可知组1中共有6个UE，并且分为一个Tx UE和5个Rx UE。
具体实施中，Tx UE通过物理侧边链路控制信道(Physical Sidelink Control Channel,PSCCH)传输侧边链路控制信息(Sidelink Control Information,SCI)。SCI能够指示侧边链路共享信道(Physical Sidelink Shared Channel,PSSCH)的位置以及调制编码格式等参数。进而，在步骤S101的具体实施中，Rx UE接收SCI，通过SCI确定PSSCH的位置，并从PSSCH上接收V2X数据。
由于SCI能够直接或间接地指示各个可用反馈资源的位置，且接收用户设备与所述传输用户设备位于同一组，因此在步骤S102的具体实施中，每个Rx UE可以至少根据SCI确定供各个Rx UE使用的各个可用反馈资源的位置。
具体而言，如果SCI能够直接指示各个可用反馈资源的位置，则Rx UE可以直接根据SCI确定各个可用反馈资源的位置。如果SCI间接地指示各个可用反馈资源的位置，则Rx UE可以结合其他已知参数通过计算的方式确定各个可用反馈资源的位置。
本实施例中，每一组内的UE具备组内标识，例如对于组1(Group1)中的6个UE，其组内标识(或者是编号)依次是1、2、3、4、5和6。当Tx UE是标识1的UE时，标识2、3、4、5和6的UE为Rx UE；当Tx UE是标识为2的UE时，标识为1、3、4、5 和6的UE为Rx UE，其余场景类推。对于接收V2X数据的UE，可以从接收的SCI和接收的V2X数据识别出Tx UE。
由于不同的Rx UE需要使用不同的反馈资源来反馈传输数据的接收状态，因此为了保证各个可用反馈资源的有序地分配给各个Rx UE，在步骤S103的具体实施中，Rx UE可用根据自身的组内标识以及组内标识与可用反馈资源的第一预设映射关系确定当前可用反馈资源。
例如，可用反馈资源为PSFCH资源池中的第3个、第6个、第9个、第12个、第15个PSFCH资源，当Tx UE标识是1，各个Rx UE的标识依次是2、3、4、5和6时，那么标识2、3、4、5和6依次对应PSFCH资源池中的第3个、第6个、第9个、第12个、第15个PSFCH资源。由此，UE2使用的反馈资源为第3个PSFCH资源，UE3使用的反馈资源为第6个PSFCH资源，依次类推，UE6使用的反馈资源为第15个PSFCH资源。
步骤S103所确定的当前可用反馈资源用于当前接收用户设备反馈传输数据的接收状态，例如，利用当前可用反馈资源反馈ACK，表示传输数据接收成功；利用当前可用反馈资源反馈NACK，表示传输数据未接收成功。
本发明实施例避免了网络在未知组成员数量的情况下，针对每个数据传输资源(如PSSCH资源)均配置独立的反馈资源，导致的反馈资源浪费或反馈资源不足。并且，本发明技术方案能够使得不同接收用户设备使用的反馈资源能够分散占据整个反馈资源池，实现负载均衡。
在本发明一个非限制性的实施例中，所述侧边链路控制信息能够指示第一个可用反馈资源的位置以及资源间隔，图1所示步骤S102可用包括以下步骤：根据所述第一个可用反馈资源的位置以及资源间隔确定各个可用反馈资源的位置。
本实施例中，Tx UE可以在SCI中指示第一个可用反馈资源的位 置以及资源间隔，例如一个可用反馈资源的位置为PSFCH资源池的第3个PSFCH资源，资源间隔为2。
由于Rx UE预先获知组内Rx UE的总数量，因此Rx UE可以确定可用反馈资源的总数量，并根据SCI的指示确定各个可用反馈资源的具***置。例如组内Rx UE的总数量为5个，则Rx UE可以确定各个可用反馈资源分别为PSFCH资源池中的第3个、第6个、第9个、第12个、第15个PSFCH资源。然后依据组内标识确定每个Rx UE各自采用的PSFCH资源，如可以按照Rx UE组内标识顺序依次确定每个Rx UE的PSFCH资源。
本发明实施例通过指示第一个可用反馈资源的位置以及资源间隔，不仅能够使得各个接收用户设备确定其可用的反馈资源，还能够避免不同的组内的接收用户设备之间的可用反馈资源产生冲突。资源间隔为1时，即组内接收UE对应的反馈资源连续时，该资源间隔可以不指示，即资源间隔的默认值为1，当采用默认值时，可以不在SCI中指示。
在本发明一个非限制性的实施例中，所述侧边链路控制信息能够指示资源间隔，请参照图2，图1所示步骤S102可以包括以下步骤：
步骤S201：确定承载所述传输数据的传输资源的首个物理资源块的位置；
步骤S202：根据所述首个物理资源块的位置与第二预设映射关系确定第一个可用反馈资源的位置，所述第二预设映射关系表示所述首个物理资源块的位置与所述第一个可用反馈资源的位置的映射关系；
步骤S203：根据所述第一个可用反馈资源的位置以及所述资源间隔确定各个可用反馈资源的位置。
本实施例中，Tx UE可以在SCI中仅指示资源间隔。而Rx UE为了确定各个可用反馈资源，还需要知道第一个可用反馈资源的位 置。在这种情况下，可以预先配置第一个可用反馈资源的位置与已知参数，例如承载传输数据的传输资源的首个物理资源块的位置的映射关系。
具体地，传输资源，例如可以是PSSCH通常是连续个物理资源块，所述第二预设映射关系可以表示PSSCH的首个物理资源块的位置与第一个可用PSFCH反馈资源的位置的映射关系。更具体地，首个物理资源块的位置可以采用首个物理资源块的索引来表示。
在另一个具体实施例中，第三预设映射关系可以表示承载SCI的物理资源块的位置与第一个可用PSFCH反馈资源的位置的映射关系。Rx UE可用根据承载SCI的物理资源块的位置与第三预设映射关系确定第一个可用PSFCH反馈资源的位置。
可用理解的是，此处PSSCH和SCI均是指Rx UE从Tx UE接收V2X数据时的PSSCH和SCI，Rx UE可以检测到多个Tx UE发送的SCI和PSSCH，但只接收自己感兴趣的Tx UE发送的SCI和PSSCH，如接收同组UE发送的V2X数据。
进而，在步骤S201和步骤S202中，Rx UE可以计算确定第一个可用反馈资源的位置，再结合SCI中的资源间隔，可以确定各个可用反馈资源的位置。
在本发明一个非限制性的实施例中，所述侧边链路控制信息能够指示第一个可用反馈资源的位置，请参照图3，图1所示步骤S102可以包括以下步骤：
步骤S301：通过小区***消息确定可用反馈资源的数量；
步骤S302：根据组内接收用户设备的数量以及所述可用反馈资源的数量确定资源间隔；
步骤S303：根据所述第一个可用反馈资源的位置以及所述资源间隔确定各个可用反馈资源的位置。
本实施例中，Tx UE可以在SCI中仅指示第一个可用反馈资源的 位置。而Rx UE为了确定各个可用反馈资源，还需要知道资源间隔。在这种情况下，可以预先通知UE可用反馈资源的数量，以使得UE可以计算出资源间隔。
本实施例中计算出的资源间隔为正整数。
具体实施中，基站可以通过***消息通知UE反馈资源池中反馈资源的总数量，由于Rx UE知道组内Rx UE的数量，因此可以计算出资源间隔。具体地，可以采用以下公式计算出资源间隔INT(N/M)，其中，N表示反馈资源池中反馈资源的总数量，M表示组内Rx UE的数量，INT()表示取整函数，可以向上取整、或向下取整。
具体实施中，Tx UE与Rx UE可以位于同一个小区，也可以位于不同的小区。
进一步地，图3所示步骤S301可以包括以下步骤：如果当前接收用户设备与所述传输用户设备属于不同小区，则通过所述小区***消息中邻小区的V2X资源配置信息获取邻小区中所述可用反馈资源的数量。
本实施例中，小区***消息中包括邻小区的V2X资源配置信息，邻小区的V2X资源配置信息包括邻小区中所述可用反馈资源的数量。
在一个具体应用场景中，Tx UE以及部分Rx UE位于小区Cell 1，该部分Rx UE可以通过当前小区的***消息获知PSFCH资源的数量；组内剩余部分Rx UE在相邻的小区Cell2，该剩余部分Rx UE可以接收自小区Cell2的***消息，在该***消息中，指示了相邻小区Cell1的V2X资源配置，其中，包含了小区Cell1所配置的PSFCH资源的数量。位于小区Cell2中的Rx UE通过接收Tx UE发送的SCI和PSSCH，可以获知Tx UE位于小区Cell1，因此Rx UE依据***消息的配置参数获知Tx UE所传输的Groupcast所对应的PSFCH资源数量。然后Rx UE依据该组成员的数量确定PSFCH资源间隔。如前所述，该组成员共6个，Rx UE的数量是5个，如果总的PSFCH资 源的数量(即Cell1所配置的该Groupcast传输资源池所对应的PSFCH资源的数量)为N，则取资源间隔为INT(N/5)，该数值为整数。这样Rx UE可以依次确定所有可用的PSFCH资源，然后依据组内的标识，每个成员获得自己所使用的PSFCH资源。
本实施例的另一种实现方式，Tx UE在向同组UE发送V2X数据的SCI中指示是否采用连续PSFCH映射的方式、或者是否采用交织PSFCH映射的方式，此时SCI可以指示第一个可用反馈资源的位置，或者可以采用上述根据SCI所调度的PSSCH的位置与第二预设映射关系确定第一个可用反馈资源的位置。当Rx UE收到SCI之后，可以获知PSFCH资源是否连续，如果连续，则组内UE在确定第一个可用反馈资源的位置之后，按照组内标识顺序依次获得各自的PSFCH资源；如果是非连续的PSFCH(即交织PSFCH映射)映射，则在获得资源间隔之后，结合第一个可用反馈资源位置以及组内标识确定各自的PSFCH资源。当Tx UE在服务小区中时，可以从***消息或RRC信令中获得PSFCH资源的映射关系，即Tx UE的服务基站可以通过***消息或RRC信令向Tx UE指示PSFCH资源的映射是否连续，此时服务基站可以按照传输资源池配置PSFCH资源是否连续，即Tx UE采用该传输资源池中的传输资源时，其PSFCH资源是否连续是由该资源池所关联的PSFCH资源的映射关系决定的；或者当Tx UE采用基站调度资源模式时，服务基站可以通过RRC信令指示所分配的用于Groupcast传输的传输资源对应的PSFCH资源是否连续。
在本发明一个非限制性的实施例中，所述侧边链路控制信息能够指示第一个可用反馈资源的位置以及可用反馈资源的数量，请参照图4，图1所示步骤S102可以包括以下步骤：
步骤S401：根据组内接收用户设备的数量以及所述可用反馈资源的数量确定资源间隔；
步骤S402：根据所述第一个可用反馈资源的位置以及所述资源 间隔确定各个可用反馈资源的位置。
本实施例中，由于SCI中指示第一个可用反馈资源的位置以及可用反馈资源的数量，因此Rx UE可以先计算出资源间隔，再根据资源间隔和第一个可用反馈资源的位置确定各个可用反馈资源的位置。在这种情况下，Rx UE所在小区的***消息中不必指示邻区的PSFCH资源的相关信息。
在本发明一个非限制性的实施例中，可用反馈资源的数量与接收用户设备的数量相等，所述第一预设映射关系表示具备相同排序的组内标识与可用反馈资源具备对应关系，请参照图5，图1所示步骤S103可以包括以下步骤：
步骤S501：对同一组内所有组内标识进行排序，并确定所述自身的组内标识所有组内标识中的序号；
步骤S502：对各个可用反馈资源按照可用反馈资源的位置进行排序，并确定具备所述序号的可用反馈资源；
步骤S503：将所述具备所述序号的可用反馈资源确定为与所述当前可用反馈资源。
本实施例中，由于可用反馈资源的数量与Rx UE的数量相等，因此按照一定的顺序将可用反馈资源的数量与Rx UE分别进行排序后，可以按照对应关系确定各个Rx UE的可用反馈资源。
在一个具体应用场景中，组内的成员可以依据其在组内的编号确定使用的PSFCH资源。组内编号依次是1、2、3、4、5和6，当Tx UE的编号是4时，Rx UE的编号分别是1、2、3、5和6。对于Rx UE，将Rx UE的编号从小到大进行排序得到1、2、3、5和6。如前所述，各个可用反馈资源按照顺序进行排序后分别是：第3个、第6个、第9个、第12个、第15个PSFCH资源。由此，“编号1、2、3、5和6”分别对应“第1个、第3个、第6个、第9个、第12个、第15个PSFCH资源”，根据上述对应关系，可以确定编号是1、2、3的Rx UE 依次使用第3个、第6个、第9个PSFCH资源；对于编号5、6的UE，依次使用第12个PSFCH资源和第15个PSFCH资源。
在另一个具体应用场景中，如果不将Rx UE和可用反馈资源进行排序的话，可以直接按照编号确定PSFCH资源。如果Tx UE的编号低于Rx UE的编号，Rx UE将编号减去1，然后使用编号减1所对应的PSFCH资源。如组内编号依次是1，2，3，4，5，6，当Tx UE是4时，对于Rx UE，编号是1、2、3的UE依次使用第3个、第6个、第9个PSFCH资源；对于编号5、6的UE，因为Tx UE是4，所以编号为5的UE使用(5-1＝4)所对应的PSFCH资源，即第12个PSFCH资源，同样编号6的UE使用第15个PSFCH资源。
请参照图6，本发明实施例还公开了一种组播反馈资源确定装置60，组播反馈资源确定装置60包括接收模块601、反馈资源位置确定模块602和反馈资源确定模块603。
其中，接收模块601用以接收来自传输用户设备的侧边链路控制信息以及传输数据，所述传输用户设备采用组播方式向与所述传输用户设备同组的其他用户设备发送所述侧边链路控制信息以及所述传输数据；反馈资源位置确定模块602用以至少根据所述侧边链路控制信息确定供各个接收用户设备使用的各个可用反馈资源的位置，所述侧边链路控制信息能够直接或间接地指示各个可用反馈资源的位置，接收用户设备与所述传输用户设备位于同一组；反馈资源确定模块603用以根据自身的组内标识以及组内标识与可用反馈资源的第一预设映射关系确定当前可用反馈资源。
本发明实施例避免了网络在未知组成员数量的情况下，针对每个数据传输资源(如PSSCH资源)均配置独立的反馈资源，导致的反馈资源浪费或反馈资源不足。并且，本发明技术方案能够使得不同接收用户设备使用的反馈资源能够分散占据整个反馈资源池，实现负载均衡。
关于所述组播反馈资源确定装置60的工作原理、工作方式的更 多内容，可以参照图1至图5中的相关描述，这里不再赘述。
本发明实施例还公开了一种存储介质，其上存储有计算机指令，所述计算机指令运行时可以执行图1至图5中所示方法的步骤。所述存储介质可以包括ROM、RAM、磁盘或光盘等。所述存储介质还可以包括非挥发性存储器(non-volatile)或者非瞬态(non-transitory)存储器等。
本发明实施例还公开了一种用户设备，所述用户设备可以包括存储器和处理器，所述存储器上存储有可在所述处理器上运行的计算机指令。所述处理器运行所述计算机指令时可以执行图1至图5中所示方法的步骤。所述用户设备包括但不限于手机、计算机、平板电脑等终端设备。
虽然本发明披露如上，但本发明并非限定于此。任何本领域技术人员，在不脱离本发明的精神和范围内，均可作各种更动与修改，因此本发明的保护范围应当以权利要求所限定的范围为准。

Claims (14)

  1. 一种组播反馈资源确定方法，其特征在于，包括：
    接收来自传输用户设备的侧边链路控制信息以及传输数据，所述传输用户设备采用组播方式向与所述传输用户设备同组的其他用户设备发送所述侧边链路控制信息以及所述传输数据；
    至少根据所述侧边链路控制信息确定供各个接收用户设备使用的各个可用反馈资源的位置，所述侧边链路控制信息能够直接或间接地指示各个可用反馈资源的位置，接收用户设备与所述传输用户设备位于同一组；
    根据自身的组内标识以及组内标识与可用反馈资源的第一预设映射关系确定当前可用反馈资源。
  2. 根据权利要求1所述的组播反馈资源确定方法，其特征在于，所述侧边链路控制信息能够指示第一个可用反馈资源的位置以及资源间隔，所述根据所述侧边链路控制信息确定供各个接收用户设备使用的各个可用反馈资源的位置包括：
    根据所述第一个可用反馈资源的位置以及资源间隔确定各个可用反馈资源的位置。
  3. 根据权利要求1所述的组播反馈资源确定方法，其特征在于，所述侧边链路控制信息能够指示资源间隔，所述至少根据所述侧边链路控制信息确定供各个接收用户设备使用的各个可用反馈资源的位置包括：
    确定承载所述传输数据的传输资源的首个物理资源块的位置；
    根据所述首个物理资源块的位置与第二预设映射关系确定第一个可用反馈资源的位置，所述第二预设映射关系表示所述首个物理资源块的位置与所述第一个可用反馈资源的位置的映射关系；
    根据所述第一个可用反馈资源的位置以及所述资源间隔确定各个 可用反馈资源的位置。
  4. 根据权利要求1所述的组播反馈资源确定方法，其特征在于，所述侧边链路控制信息能够指示资源间隔，所述至少根据所述侧边链路控制信息确定供各个接收用户设备使用的各个可用反馈资源的位置包括：
    确定承载所述侧边链路控制信息的物理资源块的位置；
    根据所述物理资源块的位置与第三预设映射关系确定第一个可用反馈资源的位置，所述第三预设映射关系表示承载所述侧边链路控制信息的物理资源块的位置与所述第一个可用反馈资源的位置的映射关系；
    根据所述第一个可用反馈资源的位置以及所述资源间隔确定各个可用反馈资源的位置。
  5. 根据权利要求1所述的组播反馈资源确定方法，其特征在于，所述侧边链路控制信息能够指示第一个可用反馈资源的位置，所述至少根据所述侧边链路控制信息确定供各个接收用户设备使用的各个可用反馈资源的位置包括：
    通过小区***消息确定可用反馈资源的数量；
    根据组内接收用户设备的数量以及所述可用反馈资源的数量确定资源间隔；
    根据所述第一个可用反馈资源的位置以及所述资源间隔确定各个可用反馈资源的位置。
  6. 根据权利要求5所述的组播反馈资源确定方法，其特征在于，所述通过小区***消息确定可用反馈资源的数量包括：
    如果当前接收用户设备与所述传输用户设备属于不同小区，则通过所述小区***消息中邻小区的V2X资源配置信息获取邻小区中所述可用反馈资源的数量。
  7. 根据权利要求1所述的组播反馈资源确定方法，其特征在于，所述侧边链路控制信息能够指示第一个可用反馈资源的位置以及可用反馈资源的数量，所述根据所述侧边链路控制信息确定供各个接收用户设备使用的各个可用反馈资源的位置包括：
    根据组内接收用户设备的数量以及所述可用反馈资源的数量确定资源间隔；
    根据所述第一个可用反馈资源的位置以及所述资源间隔确定各个可用反馈资源的位置。
  8. 根据权利要求1所述的组播反馈资源确定方法，其特征在于，可用反馈资源的数量与接收用户设备的数量相等，所述第一预设映射关系表示具备相同排序的组内标识与可用反馈资源具备对应关系，所述根据自身的组内标识以及组内标识与可用反馈资源的第一预设映射关系确定当前可用反馈资源包括：
    对同一组内所有组内标识进行排序，并确定所述自身的组内标识在所有组内标识中的序号；
    对各个可用反馈资源按照可用反馈资源的位置进行排序，并确定具备所述序号的可用反馈资源；
    将所述具备所述序号的可用反馈资源确定为与所述当前可用反馈资源。
  9. 根据权利要求1所述的组播反馈资源确定方法，其特征在于，所述侧边链路控制信息能够指示可用反馈资源是否连续，所述接收来自传输用户设备的侧边链路控制信息以及传输数据之后还包括：
    根据所述侧边链路控制信息确定可用反馈资源是否连续，所述可用反馈资源的映射关系包括连续映射和交织映射。
  10. 根据权利要求9所述的组播反馈资源确定方法，其特征在于，所述传输用户设备通过服务基站的***消息或RRC信令确定可用反馈资源是否连续。
  11. 根据权利要求1至10任一项所述的组播反馈资源确定方法，其特征在于，所述可用反馈资源为PSFCH资源。
  12. 一种组播反馈资源确定装置，其特征在于，包括：
    接收模块，用以接收来自传输用户设备的侧边链路控制信息以及传输数据，所述传输用户设备采用组播方式向与所述传输用户设备同组的其他用户设备发送所述侧边链路控制信息以及所述传输数据；
    反馈资源位置确定模块，用以至少根据所述侧边链路控制信息确定供各个接收用户设备使用的各个可用反馈资源的位置，所述侧边链路控制信息能够直接或间接地指示各个可用反馈资源的位置，接收用户设备与所述传输用户设备位于同一组；
    反馈资源确定模块，用以根据自身的组内标识以及组内标识与可用反馈资源的第一预设映射关系确定当前可用反馈资源。
  13. 一种存储介质，其上存储有计算机指令，其特征在于，所述计算机指令运行时执行权利要求1至11中任一项所述组播反馈资源确定方法的步骤。
  14. 一种用户设备，包括存储器和处理器，所述存储器上存储有可在所述处理器上运行的计算机指令，其特征在于，所述处理器运行所述计算机指令时执行权利要求1至11中任一项所述组播反馈资源确定方法的步骤。
PCT/CN2020/087111 2019-07-08 2020-04-27 组播反馈资源确定方法及装置、存储介质、用户设备 WO2021004136A1 (zh)

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