WO2022135336A1 - QoS分割和携带方法、对象侧QoS确定方法及UE - Google Patents

QoS分割和携带方法、对象侧QoS确定方法及UE Download PDF

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Publication number
WO2022135336A1
WO2022135336A1 PCT/CN2021/139636 CN2021139636W WO2022135336A1 WO 2022135336 A1 WO2022135336 A1 WO 2022135336A1 CN 2021139636 W CN2021139636 W CN 2021139636W WO 2022135336 A1 WO2022135336 A1 WO 2022135336A1
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Prior art keywords
target
source
side channel
qos
channel
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PCT/CN2021/139636
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English (en)
French (fr)
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刘蕾
刘仁茂
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夏普株式会社
刘蕾
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Priority to US18/268,435 priority Critical patent/US20240040438A1/en
Publication of WO2022135336A1 publication Critical patent/WO2022135336A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
    • 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
    • H04W28/0268—Traffic management, e.g. flow control or congestion control using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • 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
    • H04W28/0215—Traffic management, e.g. flow control or congestion control based on user or device properties, e.g. MTC-capable devices
    • H04W28/0221—Traffic management, e.g. flow control or congestion control based on user or device properties, e.g. MTC-capable devices power availability or consumption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
    • 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

Definitions

  • the present invention relates to the technical field of wireless communication, and more particularly, the present invention relates to a method for segmenting QoS, a method for carrying QoS, a method for determining object-side QoS, and a corresponding user equipment performed by user equipment.
  • end-to-end QoS requirements need to be guaranteed for both UE-to-network and UE-to-UE relay architectures.
  • the end-to-end QoS guarantee parameters can be negotiated through signaling interaction between the UE and the UE and between the UE and the network.
  • the relay UE can segment the end-to-end QoS requirements, and ensure the QoS requirements in segments so as to meet the end-to-end QoS requirements.
  • the present invention discusses the related issues of how the remote UE and the relay UE guarantee QoS requirements.
  • the purpose of the present invention is to provide a method for segmenting QoS, a method for carrying QoS, a method for determining QoS on an object side, and a corresponding user equipment for user equipment to perform sideline communication relay service quality assurance.
  • a method for dividing QoS performed by a relay UE the method is used for dividing the QoS from the remote UE on the source side to the target end node into the QoS on the source side and the QoS on the target side side QoS, the source side QoS is the QoS requirement of the source side service data transmission between the source side remote UE and the relay UE, and the target side QoS is the relay UE and the target side QoS requirements for target side service data transmission between nodes
  • the method includes: based on the source side channel index and the target side channel index, determining the communication state comparison result of the source side channel and the target side channel; When it is indicated that the communication state of the source side channel is better than the communication state of the target side channel, the source side QoS is made higher than the target side QoS; and the comparison result of the communication state indicates that the source side channel has a higher QoS When the communication state is worse than the communication state of the target-side
  • the source-side channel indicator and the target-side channel indicator may be indicators of the same type, and based on the source-side channel indicator and the target-side channel indicator, determining the communication state comparison result of the source-side channel and the target-side channel may include: : determine the comparison result of the communication state of the source side channel and the target side channel based on the direct comparison between the source side channel index and the target side channel index,
  • the source side channel indicator and the target side channel indicator may be indicators of different types, and based on the source side channel indicator and the target side channel indicator, determining the communication state comparison result of the source side channel and the target side channel may include: : Multiply the source side channel index and the target side channel index with the corresponding coefficients, and compare the obtained products to determine the comparison result of the communication state of the source side channel and the target side channel.
  • the target end node may be a base station
  • the source side channel indicator may include source side SL-RSRP or source side SD-RSRP of the source side channel
  • the target side channel indicator may include the target side channel indicator.
  • the target side RSRP of the side channel based on the source side channel index and the target side channel index, determining the communication state comparison result of the source side channel and the target side channel may include: on the source side SL-RSRP or the source side SD-RSRP When it is higher than the target side RSRP, it is determined that the communication status of the source side channel is better than the communication status of the target side channel; and/or, in the source side SL-RSRP or the source side SD-RSRP When the RSRP is lower than the target side RSRP, it is determined that the communication state of the source side channel is inferior to the communication state of the target side channel.
  • the target end node may be a target remote UE
  • the source side channel indicator may include source side SL-RSRP or source side SD-RSRP of the source side channel
  • the target side channel indicator includes The target side SL-RSRP or the target side SD-RSRP of the target side channel, based on the source side channel index and the target side channel index, determining the communication state comparison result of the source side channel and the target side channel may include: on the source side When the channel index is higher than the target side channel index, it is determined that the communication state of the source side channel is better than the communication state of the target side channel; and/or, when the source side channel index is lower than the target side channel When the index is met, it is determined that the communication state of the source side channel is inferior to the communication state of the target side channel.
  • the target end node may be a target remote UE
  • the source side channel indicator may include the source side CBR of the source side channel
  • the target side channel indicator may include the target side channel target.
  • the side CBR based on the source side channel index and the target side channel index, determining the communication state comparison result of the source side channel and the target side channel may include: when the source side CBR is lower than the target side CBR, determining the source side channel The communication status of the channel is better than the communication status of the target side channel; and/or, when the source side CBR is higher than the target side CBR, it is determined that the communication status of the source side channel is worse than that of the target side channel communication status.
  • a method for carrying QoS information performed by a remote UE comprising: acquiring sideline communication DRB configuration information, where the sideline communication DRB configuration information includes indicating whether sideline communication is required
  • the SDAP data PDU carries the QoS flow identification indication information of the QoS flow identification; and when it is determined that the QoS flow identification needs to be carried in the sideline communication data PDU based on the QoS flow identification indication information, constructing the sideline communication with the QoS flow identification SDAP data PDU, the QoS flow identifier indicates the QoS information of the QoS flow carrying service data transmission between the remote UE and the relay UE, and is used by the relay UE to determine between the relay UE and the object side
  • the object-side QoS information corresponding to the QoS flow that bears the service data transmission between the nodes, the QoS between the remote UE and the object-side node is divided by the method described in any one of claims 1-4 is the source side Q
  • the method further includes: when data needs to be sent, judging whether the data to be sent is the data that needs to be relayed; and when the data to be sent is the data that needs to be relayed, constructing a QoS flow identifier.
  • the QoS flow identifier indication information may be the sideline communication SDAP header indication information indicating whether the sideline communication SDAP data PDU needs to include an SDAP header, the SDAP header includes the QoS flow identifier, and the configuration has the QoS flow identifier.
  • the sideline communication SDAP data PDU may include: constructing the sideline communication SDAP data PDU including the SDAP header according to a format including the SDAP header.
  • a method for determining QoS information on a target side performed by a relay UE including: when a source side channel and/or a target side channel are changed, saving the existing source side channel
  • the channel mapping relationship between the channel and the corresponding target side channel, the target side channel is the channel between the relay UE and the target end node, and the source side channel is the source side remote UE and the relay.
  • the channel between UEs, the mapping relationship is determined based on the source side QoS of the source side channel and the corresponding target side QoS of the target side channel; and when data is received from the remote UE, according to the channel mapping relationship and The receiving-side QoS of the receiving-side channel that receives the data, determining the receiving-side channel corresponding to the receiving-side channel for sending the data to the target-side node, and the receiving-side QoS is the remote UE and the target-side channel.
  • the method further includes: when the corresponding object-side channel cannot be determined according to the channel mapping relationship, based on the object-side QoS corresponding to the receiving-side QoS, creating a new channel for the object-side corresponding to the receiving-side channel.
  • the side node sends the object side channel of the data, and passes the newly created object side channel.
  • a user equipment including: a processor; and a memory storing instructions; wherein the instructions execute the methods provided by the above aspects when executed by the processor.
  • the QoS of the channel between the source-side remote UE and the target end node can be divided reasonably.
  • the corresponding source-side QoS and target-side QoS can be accurately determined in the channel in which the QoS is divided.
  • FIG. 1 is a schematic diagram for explaining a remote UE and a relay UE involved in the present invention.
  • FIG. 2 is a schematic diagram for explaining various scenarios of UE-to-Network relay according to the present invention.
  • FIG. 3 is a schematic diagram for explaining the architecture of the UE-to-Network relay according to the present invention.
  • FIG. 4 is a schematic diagram for explaining the architecture of the UE-to-UE relay according to the present invention.
  • FIG. 5 is a schematic diagram for explaining an example of the format of the SDAP header according to the present invention.
  • FIG. 6 is a schematic diagram for explaining another example of the format of the SDAP header according to the present invention.
  • FIG. 7 is a schematic structural block diagram of the user equipment UE involved in the present invention.
  • UE User Equipment user equipment
  • RRC Radio Resource Control Radio Resource Control
  • RRC_IDLE RRC idle state
  • Radio Access Network Radio Access Layer
  • SDAP Service Data Adaptation Protocol, Service Data Adaptation Protocol
  • SCI Sidelink Control Information, side communication control information
  • RSRP Reference Signal Receiving Power, reference signal receiving power
  • PSCCH Physical Sidelink Control Channel, Physical Sidelink Communication Control Channel
  • PSSCH Physical Sidelink Shared Channel, physical side communication shared channel
  • MIB Master Information Block, the main information block
  • SIB System Information Block, system information block
  • DMRS Dedicated demodulation reference signal, dedicated demodulation reference signal
  • SD-RSRP Sidelink Discovery Reference Signal Received Power, Sidelink Discovery Reference Signal Received Power
  • SL-RSRP Sidelink RSRP, Sidelink Communication Reference Signal Received Power
  • QoS Quality of Service, quality of service
  • NG-RAN NG Radio Access Network, a new generation of radio access network
  • 5GC 5G Core Network, 5G Core Network
  • PDU Protocol Data Unit, protocol data unit
  • SDU Service Data Unit, service data unit
  • QFI QoS Flow ID, QoS Flow ID
  • 5QI 5G QoS Identifier; 5G QoS identifier
  • NAS Non-Access Stratum; non-access layer
  • DRB Data Radio Bearer
  • RLC Radio Link Control
  • network, base station and RAN can be used interchangeably, and the network can be a long-term evolution LET network, a new radio access technology (New RAT, NR) network, an enhanced long-term evolution eLTE network, or a 3GPP subsequent evolution version other networks as defined in .
  • New RAT new radio access technology
  • eLTE enhanced long-term evolution eLTE network
  • 3GPP subsequent evolution version other networks as defined in .
  • the user equipment UE may refer to the NR device supporting the NR Sidelink relay function described in the background art, or may refer to other types of NR devices or LTE devices.
  • the PC5 interface is an interface for sidelink communication between the UE and the control plane and the user plane.
  • the PC5-RRC connection is an AS layer logical connection between a pair of source layer two IDs and target layer two IDs.
  • the UE-to-UE relay is shown in Figure 1, the left and right sides are the remote UEs, and the middle is the relay UE.
  • the remote UE and the relay UE are respectively connected through the PC5 interface. Since the two remote UEs are far apart or the communication environment is poor, the relay UE needs to relay and forward the signaling and data between the two.
  • UE-to-UE relay scenarios include:
  • both remote UEs ie, source-side UE and target-side UE
  • relay UEs are within coverage
  • Partial coverage among the two remote UEs and the relay UE, at least one UE is in coverage, and at least one UE is out of coverage.
  • the coverage area refers to the coverage area of the base station.
  • the UE-to-Network relay is shown in Figure 2.
  • the left side is the remote UE
  • the middle is the relay UE
  • the right side is the relay UE.
  • the side is the network (also referred to as base station, network, and NW in this specification);
  • scenario 3 ((C) of FIG. 2 )
  • the two sides are the network
  • the middle is the remote UE and the relay UE respectively from left to right.
  • the remote UE and the relay UE are connected through the PC5 interface, and the relay UE and the network are connected through the Uu interface. Since the remote UE is far from the network or the communication environment is poor, the relay UE needs to relay and forward the signaling and data between the two.
  • the scenarios of UE-to-Network relay include:
  • Both the Remote UE and the Relay UE are within the coverage and in the same cell;
  • Both the Remote UE and the Relay UE are within the coverage, but in different cells.
  • the QoS of the PC5 interface and the QoS of the Uu interface are respectively guaranteed to ensure the end-to-end QoS.
  • the target end node in this specification includes the target side Remote UE and NG-RAN (corresponding to the base station).
  • QoS parameters can be negotiated and modified between remote UE and UE-to-NW relay through PC5-S signaling, and QoS parameters can be negotiated and modified between UE-to-NW relay and NG-RAN through NAS signaling .
  • the Relay UE when the Relay UE receives the data sent by the Remote UE, it can find the appropriate Uu port resources for data transmission according to the QoS requirements, so as to meet the end-to-end QoS requirements; also when the Relay UE receives the data sent by the NG-RAN , it is also necessary to find suitable PC5 port resources for data transmission according to QoS requirements.
  • the QoS of the PC5 interface on the source side and the QoS of the PC5 interface on the target side are respectively guaranteed to ensure the end-to-end QoS.
  • Both Source UE and Target UE are remote UE (Target UE can also be called Destination UE).
  • QoS parameters can be negotiated and modified between the source UE and the UE-to-UE relay and between the UE-to-UE relay and the target UE through PC5-S signaling.
  • the Relay UE receives the data sent by the source UE, it can find the appropriate PC5 port resources on the target side for data transmission according to the QoS requirements, so as to meet the end-to-end QoS requirements; also when the Relay UE receives the data sent by the target UE It is also necessary to be able to find suitable source-side PC5 port resources for data transmission according to QoS requirements.
  • the Relay UE can also perform QoS segmentation according to the end-to-end QoS requirements.
  • the QoS requirements are divided into two parts, the PC5 interface and the Uu interface;
  • the QoS requirements are divided into two parts: the source-side PC5 interface and the target-side PC5 interface.
  • the Relay UE notifies the remote UE or the network of the divided QoS requirements through signaling.
  • the PC5 interface establishes different SL QoS flow (QoS flow) bearers
  • the Uu interface establishes different Uu QoS flow bearers.
  • SL QoS flow is identified by PQFI
  • Uu QoS flow is identified by QFI.
  • the QoS flow is carried by the radio bearer (radio bearer), and different radio bearers may correspond to different RLC channels.
  • the data PDU of the SDAP layer has two formats, one with header and the other without header, and the header contains PQFI.
  • SDAP layer data PDU also has two formats, one with header and the other without header, and the header contains QFI.
  • the present invention describes in detail how the remote UE carries QoS information so that the relay UE performs data forwarding, and how the relay UE performs QoS segmentation to ensure several embodiments of the QoS requirements in various scenarios of the NR sidelink relay.
  • the relay UE can divide the end-to-end QoS requirements into the QoS requirements of the PC5 interface (corresponding to the source side channel) (corresponding to the source side QoS) and the Uu interface (corresponding to the target side channel) channel) QoS requirements (corresponding to target side QoS).
  • the relay UE can divide the end-to-end QoS requirements into two parts: source side and target side QoS requirements.
  • the SL-RSRP of the PC5 port is higher than the RSRP of the Uu port, more QoS requirements are divided for the PC5 port than the Uu port, that is, the PC5 port needs to meet higher QoS requirements (for example, a shorter time).
  • the PC5 port will be divided with less QoS requirements than the Uu port, that is, the PC5 port needs to meet lower QoS requirements.
  • the SD-RSRP of the PC5 port is higher than the RSRP of the Uu port, more QoS requirements are divided for the PC5 port than the Uu port, that is, the PC5 port needs to meet higher QoS requirements; on the contrary, if the PC5 port The SD-RSRP is lower than the RSRP of the Uu port, so the PC5 port has less QoS requirements than the Uu port, that is, the PC5 port needs to meet lower QoS requirements.
  • PC5 port SL-RSRP and Uu port RSRP are directly compared;
  • PC5 port SD-RSRP and Uu port RSRP are directly compared;
  • the relay UE performs QoS segmentation (in this scenario, the source-side PC5 interface corresponds to the source-side channel, and the target-side PC5 interface corresponds to the target-side channel):
  • the source side needs to meet higher QoS requirements; otherwise, If the SL-RSRP of the source side is lower than the SL-RSRP of the target side, compared with the target side, less QoS requirements are allocated to the source side, that is, the source side needs to meet lower QoS requirements;
  • the source side SD-RSRP is higher than the target side SD-RSRP, then compared to the target side, the source side is divided into more QoS requirements, that is, the source side needs to meet higher QoS requirements; otherwise, If the SD-RSRP of the source side is lower than the SD-RSRP of the target side, compared with the target side, less QoS requirements are allocated to the source side, that is, the source side needs to meet lower QoS requirements;
  • the source side is divided into fewer QoS requirements than the target side, that is, the source side needs to meet lower QoS requirements;
  • the SD-RSRP on the source side is higher than the SL-RSRP on the target side, more QoS requirements are divided for the source side than on the target side, that is, the source side needs to meet higher QoS requirements; otherwise, If the SD-RSRP of the source side is lower than the SL-RSRP of the target side, compared with the target side, less QoS requirements are allocated to the source side, that is, the source side needs to meet lower QoS requirements;
  • the source side is divided with less QoS requirements, that is, the source side needs to meet the lower QoS requirements; If the CBR is lower than the CBR of the target side, more QoS requirements are divided for the source side than the target side, that is, the source side needs to meet higher QoS requirements.
  • SD-RSRP and SL-RSRP are directly compared;
  • comparing the source-side channel index with the target-side channel index includes directly comparing the source-side channel index and the target-side channel index or multiplying them by the corresponding coefficients. accumulate for comparison.
  • the above-mentioned case where one of the source-side channel index and the target-side channel index is multiplied by one coefficient and then compared with the other can be regarded as a case where the coefficient of the other is 1.
  • the source-side SD-RSRP and the target-side SL-RSRP can be directly compared to determine whether the source-side SD-RSRP is higher than the target-side SL-RSRP,
  • the source-side SD-RSRP and the target-side SL-RSRP may also be multiplied by corresponding coefficients, respectively, and the level of the two may be determined according to the obtained product.
  • the relay UE configures the Sidelink DRB for the remote UE through the RRCReconfigurationSidelink message (side-signal communication RRC reconfiguration message), which includes the IE of sl-SDAP-Header . If the first condition is met, the relay UE sets the sl-SDAP-Header in the RRCReconfigurationSidelink message to present.
  • RRCReconfigurationSidelink message side-signal communication RRC reconfiguration message
  • the remote UE obtains the configuration of the sidelink DRB through the pre-configuration information, which includes the IE of sl-SDAP-Header. If the first condition is met, the IE is set to present.
  • the remote UE obtains the configuration of the sidelink DRB through the base station configuration information, which includes the IE of sl-SDAP-Header. If the first condition is met, the IE is set to present by the base station.
  • the first condition is one of the following:
  • the sidelink DRB is used for sidelink relay
  • the sidelink DRB is used for relay UE to forward the service data of remote UE;
  • the upper layer indicates that the sidelink DRB is used for sidelink relay
  • the upper layer indicates that the sidelink DRB is used for the relay UE to forward the service data of the remote UE.
  • the remote UE When the sl-SDAP-Header is set to present, when the remote UE sends the sidelink SDAP data PDU, it constructs the sidelink SDAP data PDU in the format with the SDAP header according to the configuration.
  • the identification information whether the SDAP header dedicated to the sidelink relay is carried is added in the Sidelink DRB configuration, for example, the IE of slrelay-SDAP-Header is added.
  • the relay UE configures the Sidelink DRB for the remote UE through the RRCReconfigurationSidelink message, which includes the slrelay-SDAP-Header. If the first condition is met, the relay UE sets the slrelay-SDAP-Header in the RRCReconfigurationSidelink message to present.
  • the remote UE obtains the configuration of the sidelink DRB through pre-configuration information, which includes the slrelay-SDAP-Headerr. If the first condition is met, the IE is set to present.
  • the remote UE obtains the configuration of the sidelink DRB through the base station configuration information, which includes the slrelay-SDAP-Header. If the first condition is met, the IE is set to present by the base station.
  • the first condition is the same as that in Example 2.
  • the remote UE When the slrelay-SDAP-Header is set to present, when the remote UE sends the sidelink SDAP data PDU, it constructs the sidelink SDAP data PDU in the format with the SDAP header according to the configuration.
  • a sidelink SDAP header format dedicated to sidelink relay is added, wherein compared with the SDAP header in the prior art, PQI information is added.
  • PQI information is added. For example but not limited to the format shown in Figure 5.
  • An SDAP header format dedicated to the Uu interface of the sidelink relay can also be added, in which 5QI is added compared to the SDAP header in the prior art. For example but not limited to the format shown in FIG. 6 .
  • the value can be set according to the slrelay-SDAP-Header configuration in Embodiment 3.
  • the UE needs to obtain the SL SDAP SDU from the SL SDAP PDU according to the new sidelink SDAP header format.
  • the SDAP layer determines that if the SDAP SDU to be sent needs to be relayed, it constructs a sidelink according to the format with the SDAP header. SDAP data PDU. Further, whether the SDAP SDU needs to be relayed may be indicated to the SDAP layer by the upper layer.
  • the relay UE when the relay UE adds, modifies or deletes the SL RLC channel on the PC5 port and adds, modifies or deletes the Uu RLC channel on the Uu port, the mapping relationship between the SL RLC channel and the Uu RLC channel is saved.
  • changing a channel when referring to changing a channel, it includes situations such as adding a new channel, modifying an existing channel, deleting an existing channel, and the like.
  • the QoS requirements of service data on PC5 and Uu interfaces are first reflected in different QoS processes, and further reflected in AS layer in that different radio bearers bear different QoS flows, and different radio bearers are carried by different RLC channels .
  • RLC channel configurations correspond to different QoS requirements of service data.
  • the relay UE receives data on a certain SL RLC channel, if the corresponding Uu RLC channel cannot be found according to the saved mapping relationship between the RLC channels, a new Uu RLC entity is created to Send the data; if the corresponding Uu RLC channel can be found according to the saved mapping relationship between the RLC channels, then send the data on the corresponding Uu RLC channel.
  • the relay UE when the relay UE adds, modifies or deletes the SL RLC channel on the source side and adds, modifies or deletes the SL RLC channel on the target side, it saves the difference between the SL RLC channel on the source side and the SL RLC channel on the target side. mapping relationship between.
  • the relay UE For data transmission from the source-side UE to the target-side UE, when the relay UE receives data on a source-side SL RLC channel, if the corresponding target-side SL RLC channel cannot be found according to the saved mapping relationship between RLC channels, Then create a new target side RLC entity to send the data; if the corresponding target side SL-RLC channel can be found according to the saved mapping relationship between RLC channels, then send the data on the corresponding target side SL-RLC channel.
  • the processing process is also the same, and it is only necessary to exchange the target side and the source side in the above actions, which is not repeated here.
  • FIG. 7 is a schematic structural block diagram of the user equipment UE involved in the present invention.
  • the user equipment UE700 includes a processor 701 and a memory 702 .
  • the processor 701 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like.
  • the memory 702 may include, for example, volatile memory (eg, random access memory RAM), a hard disk drive (HDD), non-volatile memory (eg, flash memory), or other memory, or the like.
  • Memory 702 has program instructions stored thereon. When the instructions are executed by the processor 701, the above method described in detail in the present invention and executed by the user equipment can be executed.
  • a program running on a device may be a program that causes a computer to implement the functions of the embodiments of the present invention by controlling a central processing unit (CPU).
  • the program or information processed by the program may be temporarily stored in volatile memory (eg, random access memory RAM), a hard disk drive (HDD), non-volatile memory (eg, flash memory), or other memory systems.
  • a program for realizing the functions of the embodiments of the present invention can be recorded on a computer-readable recording medium.
  • the corresponding functions can be realized by causing a computer system to read programs recorded on the recording medium and execute the programs.
  • the so-called "computer system” as used herein may be a computer system embedded in the device, and may include an operating system or hardware (eg, peripheral devices).
  • the "computer-readable recording medium” may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium that dynamically stores a program for a short period of time, or any other recording medium readable by a computer.
  • circuits eg, monolithic or multi-chip integrated circuits.
  • Circuits designed to perform the functions described in this specification may include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of the above.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • a general-purpose processor may be a microprocessor or any existing processor, controller, microcontroller, or state machine.
  • the above circuit may be a digital circuit or an analog circuit. Where new integrated circuit technologies have emerged as a result of advances in semiconductor technology to replace existing integrated circuits, one or more embodiments of the present invention may also be implemented using these new integrated circuit technologies.
  • the present invention is not limited to the above-described embodiments. Although various examples of the described embodiments have been described, the invention is not limited thereto.
  • Fixed or non-mobile electronic equipment installed indoors or outdoors can be used as terminal equipment or communication equipment, such as AV equipment, kitchen equipment, cleaning equipment, air conditioners, office equipment, vending machines, and other household appliances.

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Abstract

本发明提供一种由用户设备执行侧行通信中继服务质量保障的对QoS进行分割的方法、携带QoS的方法和确定对象侧QoS的方法以及相应的用户设备。所述对QoS进行分割的方法用于将从源侧远端UE至目标端节点之间的QoS分割为源侧QoS和目标侧QoS，包括：基于源侧信道指标和目标侧信道指标，确定源侧信道和目标侧信道的通信状态对比结果；在所述通信状态对比结果表明所述源侧信道的通信状态优于所述目标侧信道的通信状态时，使所述源侧QoS高于所述目标侧QoS；以及在所述通信状态对比结果表明所述源侧信道的通信状态劣于所述目标侧信道的通信状态时，使所述源侧QoS低于所述目标侧QoS。

Description

QoS分割和携带方法、对象侧QoS确定方法及UE 技术领域
本发明涉及无线通信技术领域，更具体地，本发明涉及由用户设备执行的对QoS进行分割的方法、携带QoS的方法和确定对象侧QoS的方法以及相应的用户设备。
背景技术
2018年6月，在第三代合作伙伴计划(3rd Generation Partnership Project：3GPP)RAN#80全会上，版本16基于5G NR网络技术的V2X可行性研究课题(参见非专利文献：RP-181480，New SID Proposal:Study on NR V2X)获得批准。版本16的NR V2X包含的主要功能为支持无网络覆盖和有网络覆盖场景下的单播、组播和广播。
2019年12月，RAN#86次全会上，针对版本17的NR sidelink relaying(侧行通信中继)的研究项目被提出(参见非专利文献：RP-193253 New Study Item on NR Sidelink Relaying)，并获批准。该研究项目的最新版本参见非专利文献：RP-201474 reivsed SID NR sidelink relay。该研究项目主要研究UE(用户设备)到网络和UE到UE的中继解决方案，用于扩展基于侧行通信的覆盖。该研究项目的目标之一是支持侧行通信中继服务质量(QoS)要求。
在版本17的NR sidelink relaying研究项目中，对于UE到网络和UE到UE的中继架构都需要保证端到端的QoS要求。端到端的QoS保障参数可以通过UE和UE之间以及UE和网络之间的信令交互进行协商。中继UE可以对端到端的QoS要求进行分割，分段保证QoS要求从而达到端到端的QoS要求。
本发明讨论远端UE和中继UE如何保障QoS要求的相关问题。
发明内容
本发明的目的在于提供用户设备执行侧行通信中继服务质量保障的对 QoS进行分割的方法、携带QoS的方法和确定对象侧QoS的方法以及相应的用户设备。
根据本发明的一个方面，提供一种由中继UE执行的对QoS进行分割的方法，所述方法用于将从源侧远端UE至目标端节点之间的QoS分割为源侧QoS和目标侧QoS，所述源侧QoS是所述源侧远端UE与所述中继UE之间的源侧业务数据传输的QoS要求，所述目标侧QoS是所述中继UE与所述目标端节点之间的目标侧业务数据传输的QoS要求，所述方法包括：基于源侧信道指标和目标侧信道指标，确定源侧信道和目标侧信道的通信状态对比结果；在所述通信状态对比结果表明所述源侧信道的通信状态优于所述目标侧信道的通信状态时，使所述源侧QoS高于所述目标侧QoS；以及在所述通信状态对比结果表明所述源侧信道的通信状态劣于所述目标侧信道的通信状态时，使所述源侧QoS低于所述目标侧QoS。
可选的，所述源侧信道指标和所述目标侧信道指标可以是相同类型的指标，基于源侧信道指标和目标侧信道指标，确定源侧信道和目标侧信道的通信状态对比结果可以包括：基于所述源侧信道指标和所述目标侧信道指标之间的直接对比，来确定源侧信道和目标侧信道的通信状态对比结果，
可选的，所述源侧信道指标和所述目标侧信道指标可以是不同类型的指标，基于源侧信道指标和目标侧信道指标，确定源侧信道和目标侧信道的通信状态对比结果可以包括：将所述源侧信道指标和所述目标侧信道指标与对应于各自的系数相乘后，对所得的积进行对比，以确定源侧信道和目标侧信道的通信状态对比结果。
可选的，所述目标端节点可以是基站，所述源侧信道指标可以包括所述源侧信道的源侧SL-RSRP或源侧SD-RSRP，所述目标侧信道指标可以包括所述目标侧信道的目标侧RSRP，基于源侧信道指标和目标侧信道指标，确定源侧信道和目标侧信道的通信状态对比结果可以包括：在所述源侧SL-RSRP或所述源侧SD-RSRP高于所述目标侧RSRP时，确定所述源侧信道的通信状态优于所述目标侧信道的通信状态；和/或，在所述所述源侧SL-RSRP或所述源侧SD-RSRP低于所述目标侧RSRP时，确定所述源侧信道的通信状态劣于所述目标侧信道的通信状态。
可选的，所述目标端节点可以是目标测远端UE，所述源侧信道指标可以包括所述源侧信道的源侧SL-RSRP或源侧SD-RSRP，所述目标侧信道指 标包括所述目标侧信道的目标侧SL-RSRP或目标侧SD-RSRP，基于源侧信道指标和目标侧信道指标，确定源侧信道和目标侧信道的通信状态对比结果可以包括：在所述源侧信道指标高于所述目标侧信道指标时，确定所述源侧信道的通信状态优于所述目标侧信道的通信状态；和/或，在所述源侧信道指标低于所述目标侧信道指标时，确定所述源侧信道的通信状态劣于所述目标侧信道的通信状态。
可选的，所述目标端节点可以是目标测远端UE，所述源侧信道指标可以包括所述源侧信道的源侧CBR，所述目标侧信道指标可以包括所述目标侧信道的目标侧CBR，基于源侧信道指标和目标侧信道指标，确定源侧信道和目标侧信道的通信状态对比结果可以包括：在所述源侧CBR低于所述目标侧CBR时，确定所述源侧信道的通信状态优于所述目标侧信道的通信状态；和/或，在所述源侧CBR高于所述目标侧CBR时，确定所述源侧信道的通信状态劣于所述目标侧信道的通信状态。
根据据本发明的另一方面，提供一种由远端UE执行的携带QoS信息的方法，包括：获取侧行通信DRB配置信息，所述侧行通信DRB配置信息包括指示是否需要在侧行通信SDAP数据PDU中携带QoS流标识的QoS流标识指示信息；以及在基于所述QoS流标识指示信息，确定需要在侧行通信数据PDU中携带QoS流标识时，构造具有QoS流标识的侧行通信SDAP数据PDU，所述QoS流标识指示在所述远端UE和中继UE之间承载业务数据传输的QoS流的QoS信息，并用于所述中继UE确定在所述中继UE与对象侧节点之间承载业务数据传输的对应于该QoS流的对象侧QoS信息，所述远端UE与所述对象侧节点之间的QoS利用权利要求1-4中任一项所述的方法而分割为源侧QoS和对应的目标侧QoS，所述QoS流标识指示所述源侧QoS和对应的目标侧QoS中的一者，所述对象侧QoS信息为所述所述源侧QoS和对应的目标侧QoS中的另一者。
可选的，所述方法还包括：在需要发送数据时，判断要发送的数据是否是需要被中继的数据；以及在要发送的数据是需要被中继的数据时，构造具有QoS流标识的侧行通信SDAP数据PDU。
可选的，所述QoS流标识指示信息可以是指示侧行通信SDAP数据PDU是否需要包括SDAP头的侧行通信SDAP头指示信息，所述SDAP头包括所述QoS流标识，配置具有QoS流标识的侧行通信SDAP数据PDU 可以包括：按照包括SDAP头的格式来构造包括所述SDAP头的侧行通信SDAP数据PDU。
根据本发明的另一方面，还提供一种由中继UE执行的确定对象侧QoS信息的方法，包括：在对源侧信道和/或目标侧信道进行变更操作时，保存即有的源侧信道和对应的目标侧信道之间的信道映射关系，所述目标侧信道是所述中继UE与目标端节点之间的信道，所述源侧信道是源侧远端UE与所述中继UE之间的信道，所述映射关系基于源侧信道的源侧QoS和对应的所述目标侧信道的目标侧QoS确定；以及在从远端UE接收到数据时，根据所述信道映射关系和接收该数据的接收侧信道的接收侧QoS，确定对应于所述接收侧信道的用于向对象侧节点发送所述数据的对象侧信道，所述接收侧QoS是所述远端UE和所述对象侧节点之间的源侧QoS和目标测QoS中的一者，所述对象侧QoS是另一者，所述源侧QoS信息和对应的所述目标侧QoS信息是利用权利要求1-4中任一项所述的方法分割而得到的。
可选的，所述方法还包括：在根据所述信道映射关系不能确定出对应的对象侧信道时，基于与接收侧QoS对应的对象侧QoS，新建对应于该接收侧信道的用于向对象侧节点发送所述数据的对象侧信道，并通过该新建的对象侧信道。
根据本发明的另一方面，还提供一种用户设备，包括：处理器；以及存储器，存储有指令；其中，所述指令在由所述处理器运行时执行上述各个方面所提供的方法。
根据本发明所提供的方法，能够合理地对源侧远端UE和目标端节点之间的信道的QoS进行分割。此外，能够在QoS被分割了的信道中准确地确定出对应的源侧Qos和目标侧QoS。
附图说明
图1是用于说明本发明涉及的远端UE和中继UE的示意图。
图2是用于说明本发明涉及的UE-to-Network中继的各种场景的示意图。
图3是用于说明本发明涉及的UE-to-Network中继的架构的示意图。
图4是用于说明本发明涉及的UE-to-UE中继的架构的示意图。
图5是用于说明本发明涉及的SDAP头的格式的一个示例的示意图。
图6是用于说明本发明涉及的SDAP头的格式的另一示例的示意图。
图7是本发明涉及的用户设备UE的简要结构框图。
具体实施方式
下面结合附图和具体实施方式对本发明进行详细阐述。应当注意，本发明不应局限于下文所述的具体实施方式。另外，为了简便起见，省略了对与本发明没有直接关联的公知技术的详细描述，以防止对本发明的理解造成混淆。
下面描述本发明涉及的部分术语，术语的具体含义见3GPP最新标准规范，例如TS38.300、TS38.331、TS36.300、TS36.331等。除非另有指出，本发明中涉及的术语都具有下文的含义。
UE：User Equipment用户设备
NR：New Radio新一代无线技术
RRC：Radio Resource Control无线资源控制
RRC_CONNECTED：RRC连接态
RRC_INACTIVE：RRC非激活态
RRC_IDLE：RRC空闲态
RAN：Radio Access Network，无线接入层
Sidelink:侧行通信
SL：Sidelink，侧行通信
SDAP:Service Data Adaptation Protocol，服务数据适配协议
SCI:Sidelink Control Information，侧行通信控制信息
RSRP:Reference Signal Receiving Power，参考信号接收功率
PSCCH:Physical Sidelink Control Channel，物理侧行通信控制信道
PSSCH:Physical Sidelink Shared Channel，物理侧行通信共享信道
AS:Access Stratum，接入层
DL:Downlink，下行
IE:Information Element，信息元素
CE：Control Element，控制元素
MIB:Master Information Block，主信息块
NR:New Radio，新无线电
SIB:System Information Block，系统信息块
DMRS:Dedicated demodulation reference signal，专有解调参考信号
SD-RSRP:Sidelink Discovery Reference Signal Received Power，侧行通信发现参考信号接收功率
SL-RSRP:Sidelink RSRP，侧行通信参考信号接收功率
QoS:Quality of Service，服务质量
CBR:Channel Busy Rate，信道忙率
NG-RAN:NG Radio Access Network,新一代无线接入网络
5GC:5G Core Network,5G核心网
PDU:Protocol Data Unit,协议数据单元
SDU:Service Data Unit,服务数据单元
PQFI:PC5 QoS Flow ID,PC5 QoS流标识
QFI:QoS Flow ID，QoS流标识
5QI:5G QoS Identifier；5G QoS标识
PQI:PC5 QoS Identifier；PC5 QoS标识
NAS：Non-Access Stratum；非接入层
DRB：Data Radio Bearer；数据无线承载
RLC：Radio Link Control；无线链路控制
本发明中，网络、基站和RAN可互换使用，所述网络可以是长期演进LET网络、新无线访问技术(New RAT，NR)网络、增强的长期演进eLTE网络，也可以是3GPP后续演进版本中定义的其他网络。
本发明中，用户设备UE可以指背景技术中所述的支持NR Sidelink中继功能的NR设备，也可以指其他类型的NR设备或者LTE设备。
PC5接口是UE和UE之间进行控制面和用户面Sidelink通信的接口。对于Sidelink单播，PC5-RRC连接是一对源层二ID和目标层二ID之间的AS层逻辑连接。一个PC5单播链路建立就会对应有一个PC5-RRC连接建立。
UE-to-UE中继如图1所所示，左右两侧为远端UE，中间为中继UE。远端UE和中继UE之间分别通过PC5接口连接。由于两个远端UE距离较远或者通信环境不佳，需要中继UE对两者间的信令和数据进行中继转发。
UE-to-UE中继的场景包含：
1)覆盖范围内：两个远端UE(即源侧UE和目标侧UE)和中继UE都在覆盖范围内；
2)覆盖范围外：两个远端UE(即源侧UE和目标侧UE)和中继UE都在覆盖范围外；
3)部分覆盖：两个远端UE和中继UE中，至少有一个UE在覆盖范围内，并且至少有一个UE在覆盖范围外。
其中，覆盖范围指的是基站的覆盖范围。
UE-to-Network中继如图2所述，场景1(图2的(A))和场景2(图2的(B))中，左侧为远端UE，中间为中继UE，右侧为网络(在本说明书中也称为基站、Network、NW)；场景3(图2的(C))中，两侧为网络，中间从左到右分别为远端UE和中继UE。远端UE和中继UE之间通过PC5接口连接，中继UE和网络通过Uu口连接。由于远端UE距离网络较远或者通信环境不佳，需要中继UE对两者间的信令和数据进行中继转发。
UE-to-Network中继的场景包含：
1)Remote UE在覆盖范围外，Relay UE在覆盖范围内；
2)Remote UE和Relay UE都在覆盖范围内，并且在同一个小区；
3)Remote UE和Relay UE都在覆盖范围内，但在不同小区。
对于UE-to-Network的中继架构，如图3所示，分别保障PC5接口的QoS和Uu接口的QoS从而对端到端的QoS进行保障。本说明书中的目标端节点包括目标侧Remote UE、NG-RAN(对应于基站)。
在控制面，remote UE和UE-to-NW relay之间可以通过PC5-S信令协商和修改QoS参数，UE-to-NW relay和NG-RAN之间可以通过NAS信令协商和修改QoS参数。在用户面，当Relay UE收到Remote UE发送的数据时能够根据QoS要求找到合适的Uu口资源进行数据传输，以便满足端到端的QoS要求；同样当Relay UE收到NG-RAN发送的数据时，也需要更够根据QoS要求找到合适的PC5口资源进行数据传输。
对于UE-to-UE的中继架构，如图4所示，分别保障源侧PC5接口的QoS和目标侧PC5接口的QoS从而对端到端的QoS进行保障。Source UE和Target UE都是remote UE(Target UE也可以称为Destination UE)。
source UE和UE-to-UE relay之间以及UE-to-UE relay和target UE之间可以通过PC5-S信令协商和修改QoS参数。在用户面，当Relay UE收到source UE发送的数据时能够根据QoS要求找到合适的目标侧PC5口资源进行数据传输，以便满足端到端的QoS要求；同样当Relay UE收到target UE发送的数据时，也需要能够根据QoS要求找到合适的源侧PC5口资源进行数据传输。
同时，Relay UE还可以根据端到端的QoS要求进行QoS分割。对于UE-to-NW中继架构，就是分割成PC5接口和Uu接口两部分QoS要求；对于UE-to-UE中继架构，就是分割成源侧PC5接口和目标侧PC5接口两部分QoS要求。
Relay UE将分割后的QoS要求通过信令通知给remote UE或者网络。针对不同的QoS要求，PC5接口建立不同的SL QoS flow(QoS流)承载，Uu接口建立不同的Uu QoS flow承载。SL QoS flow用PQFI标识，Uu QoS flow用QFI标识。在AS层，QoS flow由radio bearer(无线承载)承载，不同的radio bearer可能对应于不同的RLC信道。
对于PC5接口用户面传输，SDAP层的数据PDU有两种格式，一种带头(with header)另一种不带头(without header)，头中含有PQFI。对于Uu接口用户面传输，SDAP层的数据PDU也有两种格式，一种带头(with header)另一种不带头(without header)，头中含有QFI。
以下，详细描述本发明对于remote UE如何携带QoS信息以便relay UE进行数据转发，以及relay UE如何进行QoS分割来保障NR sidelink relay各种场景下的QoS要求的若干实施例。
实施例1
对于UE-to-Network relay的中继架构，relay UE可以将端到端的QoS要求分割成PC5接口(对应于源侧信道)的QoS要求(对应于源侧QoS)和Uu口(对应于目标侧信道)的QoS要求(对应于目标侧QoS)。对于UE-to-UE relay的中继架构，relay UE可以将端到端的QoS要求分割成源侧 和目标侧两部分QoS要求。
对于UE-to-Network relay的中继架构，Relay UE在进行QoS分割的时候：
1)可选地，如果PC5口SL-RSRP高于Uu口RSRP，则相比于Uu口给PC5口分割更多的QoS要求，即PC5口需要满足更高的QoS要求(例如更短的时延，更大的传输速度等)；反之，如果PC5口SL-RSRP低于Uu口RSRP，则相比于Uu口给PC5口分割更少的QoS要求，即PC5口需要满足更低的QoS要求；
2)可选地，如果PC5口SD-RSRP高于Uu口RSRP，则相比于Uu口给PC5口分割更多的QoS要求，即PC5口需要满足更高的QoS要求；反之，如果PC5口SD-RSRP低于Uu口RSRP，则相比于Uu口给PC5口分割更少的QoS要求，即PC5口需要满足更低的QoS要求。
其中，PC5口SL-RSRP和Uu口RSRP进行比较时，可能采用如下的一种方式：
1)可选地，PC5口SL-RSRP和Uu口RSRP直接比较；
2)可选地，将PC5口SL-RSRP乘以一个系数的乘积和Uu口RSRP比较；
3)可选地，将PC5口SL-RSRP和Uu口RSRP乘以一个系数的乘积比较。
其中，PC5口SD-RSRP和Uu口RSRP进行比较时，可能采用如下的一种方式：
1)可选地，PC5口SD-RSRP和Uu口RSRP直接比较；
2)可选地，将PC5口SD-RSRP乘以一个系数的乘积和Uu口RSRP比较；
3)可选地，将PC5口SD-RSRP和Uu口RSRP乘以一个系数的乘积比较。
对于UE-to-UE relay的中继架构，relay UE在进行QoS分割的时候(在该场景下，源侧PC5接口对应于源侧信道，目标侧PC5接口对应于目标侧信道)：
1)可选地，如果源侧SL-RSRP高于目标侧SL-RSRP，则相比于目标侧，给源侧分割更多的QoS要求，即源侧需要满足更高的QoS要求；反之，如果源侧SL-RSRP低于目标侧SL-RSRP，则相比于目标侧，给源侧分割更少的QoS要求，即源侧需要满足更低的QoS要求；
2)可选地，如果源侧SD-RSRP高于目标侧SD-RSRP，则相比于目标侧，给源侧分割更多的QoS要求，即源侧需要满足更高的QoS要求；反之，如果源侧SD-RSRP低于目标侧SD-RSRP，则相比于目标侧，给源侧分割更少的QoS要求，即源侧需要满足更低的QoS要求；
3)可选地，如果源侧SL-RSRP高于目标侧SD-RSRP，则相比于目标侧，给源侧分割更多的QoS要求，即源侧需要满足更高的QoS要求；反之，如果源侧SL-RSRP低于目标侧SD-RSRP，则相比于目标侧，给源侧分割更少的QoS要求，即源侧需要满足更低的QoS要求；
4)可选地，如果源侧SD-RSRP高于目标侧SL-RSRP，则相比于目标侧，给源侧分割更多的QoS要求，即源侧需要满足更高的QoS要求；反之，如果源侧SD-RSRP低于目标侧SL-RSRP，则相比于目标侧，给源侧分割更少的QoS要求，即源侧需要满足更低的QoS要求；
5)可选地，如果源侧CBR高于目标侧CBR，则相比于目标侧，给源侧分割更少的QoS要求，即源侧需要满足更低的QoS要求；反之，如果如果源侧CBR低于目标侧CBR，则相比于目标侧，给源侧分割更多的QoS要求，即源侧需要满足更高的QoS要求。
其中，SD-RSRP和SL-RSRP进行比较时，如上面的3)和4)两种情况，可能采用如下的一种方式：
1)可选地，SD-RSRP和SL-RSRP直接比较；
2)可选地，将SD-RSRP乘以一个系数的乘积和SL-RSRP比较；
3)可选地，将SD-RSRP和SL-RSRP乘以一个系数的乘积比较。
需要说明的是，在本说明书中提及将源侧信道指标与目标侧信道指标进行对比时，包括直接对比源侧信道指标和目标侧信道指标或将其分别乘 以对应的系数之后对所得的积进行对比。此外，上述将源侧信道指标与目标侧信道指标中的一者与一个系数相乘后与另一者对比的情况可以视为另一者的系数为1的情况。例如，在提及源侧SD-RSRP高于目标侧SL-RSRP时，可以直接比较源侧SD-RSRP与目标侧SL-RSRP，以确定源侧SD-RSRP是否高于目标侧SL-RSRP，还可以将较源侧SD-RSRP与目标侧SL-RSRP分别与对应的系数相乘后，根据据所得的积来确定二者的高低。
实施例2
可选地，在remote UE和relay UE已经建立了PC5单播链路后，relay UE通过RRCReconfigurationSidelink消息(侧信通信RRC重配消息)为remote UE配置Sidelink DRB，其中包含sl-SDAP-Header这个IE。如果满足第一条件，则relay UE将RRCReconfigurationSidelink消息中的sl-SDAP-Header设置为present。
可选地，remote UE通过预配置信息获取到sidelink DRB的配置，其中包含sl-SDAP-Header这个IE。如果满足第一条件，该IE被置为present。
可选地，remote UE通过基站配置信息获取到sidelink DRB的配置，其中包含sl-SDAP-Header这个IE。如果满足第一条件，该IE被基站置为present。
其中，第一条件为如下的一种：
1)可选地，该sidelink DRB是用于sidelink relay；
2)可选地，该sidelink DRB是用于relay UE转发remote UE的业务数据；
3)可选地，上层指示该sidelink DRB用于sidelink relay；
4)可选地，上层指示该sidelink DRB用于relay UE转发remote UE的业务数据。
当sl-SDAP-Header被设置为present，remote UE在发送sidelink SDAP数据PDU时，根据该配置按照带有SDAP头的格式构造sidelink SDAP数据PDU。
实施例3
基于实施例2，在Sidelink DRB配置中增加专用于sidelink relay的SDAP 头是否携带的标识信息，例如增加slrelay-SDAP-Header这个IE。
可选地，在remote UE和relay UE已经建立了PC5单播链路后，relay UE通过RRCReconfigurationSidelink消息为remote UE配置Sidelink DRB，其中包含slrelay-SDAP-Header。如果满足第一条件，则relay UE将RRCReconfigurationSidelink消息中的slrelay-SDAP-Header设置为present。
可选地，remote UE通过预配置信息获取到sidelink DRB的配置，其中包含slrelay-SDAP-Headerr。如果满足第一条件，该IE被置为present。
可选地，remote UE通过基站配置信息获取到sidelink DRB的配置，其中包含slrelay-SDAP-Header。如果满足第一条件，该IE被基站置为present。
其中，第一条件和实施例2中的相同。
当slrelay-SDAP-Header被设置为present，remote UE在发送sidelink SDAP数据PDU时，根据该配置按照带有SDAP头的格式构造sidelink SDAP数据PDU。
实施例4
基于实施例3，增加一种专用于sidelink relay的sidelink SDAP头格式，其中相比于现有技术中的SDAP头，增加PQI信息。例如但不限于如图5所示的格式。
还可以增加一种专用于sidelink relay的Uu接口的SDAP头格式，其中相比于现有技术中的SDAP头，增加5QI。例如但不限于如图6所示的格式。
是否携带新的sidelink SDAP头或者新的Uu口的SDAP头，可以根据实施例3中的slrelay-SDAP-Header配置取值。
同时，当作为数据的接收方，对于PC5接口，如果sidelink DRB配置中的slrelay-SDAP-Header被配置为present，则UE需要按照新的sidelink SDAP头格式从SL SDAP PDU中获取到SL SDAP SDU。
实施例5
在remote UE和relay UE已经建立了PC5单播链路后，当remote UE需要发送数据时，SDAP层判断如果需要发送的SDAP SDU是需要被中继的，则按照带有SDAP头的格式构造sidelink SDAP数据PDU。进一步地，SDAP SDU是否需要被中继，可能由上层指示给SDAP层。
实施例6
对于UE-to-Network中继架构，relay UE在PC5口增加、修改或者删除SL RLC信道以及在Uu口增加、修改或者删除Uu RLC信道时，保存SL RLC信道和Uu RLC信道之间的映射关系。在本说明书中，提及对信道进行变更时，包括增加新的信道、对即有信道进行修改、删除即有信道等情形。PC5和Uu接口上的业务数据的QoS要求首先体现在由不同的QoS流程承载，进一步在AS层体现在不同的radio bearer承载不同的QoS流，而不同的radio bearer又由不同的RLC信道来承载。因此，不同的RLC信道配置对应于不同的业务数据的QoS要求。对于从remote UE到网络的数据发送，当relay UE在某个SL RLC信道上收到数据，如果根据保存的RLC信道间的映射关系找不到对应的Uu RLC信道，则新建一个Uu RLC实体来发送该数据；如果根据保存的RLC信道间的映射关系能够找到对应的Uu RLC信道，则在对应的Uu RLC信道上发送该数据。反之，对于从网络到remote UE的数据发送，当relay UE在某个Uu RLC信道上收到数据，如果根据保存的RLC信道间的映射关系找不到对应的SL RLC信道，则新建一个SL RLC实体来发送该数据；如果根据保存的RLC信道间的映射关系能够找到对应的SL RLC信道，则在对应的SL RLC信道上发送该数据。
对于UE-to-UE中继架构，relay UE在源侧增加、修改或者删除SL RLC信道以及在目标侧增加、修改或者删除SL RLC信道时，保存源侧SL RLC信道和目标侧SL RLC信道之间的映射关系。对于从源侧UE到目标侧UE的数据发送，当relay UE在某个源侧SL RLC信道上收到数据，如果根据保存的RLC信道间的映射关系找不到对应的目标侧SL RLC信道，则新建一个目标侧RLC实体来发送该数据；如果根据保存的RLC信道间的映射关系能够找到对应的目标侧SL-RLC信道，则在对应的目标侧SL-RLC信道上发送该数据。对于从目标侧UE到源侧UE的数据发送，处理过程也是一样的，只需要将上述动作中的目标侧和源侧互换即可，不再赘述。
图7是本发明涉及的用户设备UE的简要结构框图。如图7所示，该用户设备UE700包括处理器701和存储器702。处理器701例如可以包括微 处理器、微控制器、嵌入式处理器等。存储器702例如可以包括易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器等。存储器702上存储有程序指令。该指令在由处理器701运行时，可以执行本发明详细描述的由用户设备执行的上述方法。
运行在根据本发明的设备上的程序可以是通过控制中央处理单元(CPU)来使计算机实现本发明的实施例功能的程序。该程序或由该程序处理的信息可以临时存储在易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器系统中。
用于实现本发明各实施例功能的程序可以记录在计算机可读记录介质上。可以通过使计算机系统读取记录在所述记录介质上的程序并执行这些程序来实现相应的功能。此处的所谓“计算机系统”可以是嵌入在该设备中的计算机系统，可以包括操作系统或硬件(如外围设备)。“计算机可读记录介质”可以是半导体记录介质、光学记录介质、磁性记录介质、短时动态存储程序的记录介质、或计算机可读的任何其他记录介质。
用在上述实施例中的设备的各种特征或功能模块可以通过电路(例如，单片或多片集成电路)来实现或执行。设计用于执行本说明书所描述的功能的电路可以包括通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)、或其他可编程逻辑器件、分立的门或晶体管逻辑、分立的硬件组件、或上述器件的任意组合。通用处理器可以是微处理器，也可以是任何现有的处理器、控制器、微控制器、或状态机。上述电路可以是数字电路，也可以是模拟电路。因半导体技术的进步而出现了替代现有集成电路的新的集成电路技术的情况下，本发明的一个或多个实施例也可以使用这些新的集成电路技术来实现。
此外，本发明并不局限于上述实施例。尽管已经描述了所述实施例的各种示例，但本发明并不局限于此。安装在室内或室外的固定或非移动电子设备可以用作终端设备或通信设备，如AV设备、厨房设备、清洁设备、空调、办公设备、自动贩售机、以及其他家用电器等。
如上，已经参考附图对本发明的实施例进行了详细描述。但是，具体 的结构并不局限于上述实施例，本发明也包括不偏离本发明主旨的任何设计改动。另外，可以在权利要求的范围内对本发明进行多种改动，通过适当地组合不同实施例所公开的技术手段所得到的实施例也包含在本发明的技术范围内。此外，上述实施例中所描述的具有相同效果的组件可以相互替代。

Claims (10)

  1. 一种由中继UE执行的对QoS进行分割的方法，所述方法用于将从源侧远端UE至目标端节点之间的QoS分割为源侧QoS和目标侧QoS，所述源侧QoS是所述源侧远端UE与所述中继UE之间的源侧业务数据传输的QoS要求，所述目标侧QoS是所述中继UE与所述目标端节点之间的目标侧业务数据传输的QoS要求，所述方法包括：
    基于源侧信道指标和目标侧信道指标，确定源侧信道和目标侧信道的通信状态对比结果；
    在所述通信状态对比结果表明所述源侧信道的通信状态优于所述目标侧信道的通信状态时，使所述源侧QoS高于所述目标侧QoS；以及
    在所述通信状态对比结果表明所述源侧信道的通信状态劣于所述目标侧信道的通信状态时，使所述源侧QoS低于所述目标侧QoS。
  2. 根据权利要求1所述的方法，其中，所述源侧信道指标和所述目标侧信道指标是相同类型的指标，基于源侧信道指标和目标侧信道指标，确定源侧信道和目标侧信道的通信状态对比结果包括：
    基于所述源侧信道指标和所述目标侧信道指标之间的直接对比，来确定源侧信道和目标侧信道的通信状态对比结果，
    或，
    所述源侧信道指标和所述目标侧信道指标是不同类型的指标，基于源侧信道指标和目标侧信道指标，确定源侧信道和目标侧信道的通信状态对比结果包括：
    将所述源侧信道指标和所述目标侧信道指标与对应于各自的系数相乘后，对所得的积进行对比，以确定源侧信道和目标侧信道的通信状态对比结果。
  3. 根据权利要求1或2所述的方法，其中，所述目标端节点是基站，所述源侧信道指标包括所述源侧信道的源侧SL-RSRP或源侧SD-RSRP，所述目标侧信道指标包括所述目标侧信道的目标侧RSRP，基于源侧信道指标和目标侧信道指标，确定源侧信道和目标侧信道的通信状态对比结果包括：
    在所述源侧SL-RSRP或所述源侧SD-RSRP高于所述目标侧RSRP时，确定所述源侧信道的通信状态优于所述目标侧信道的通信状态；和/或，
    在所述所述源侧SL-RSRP或所述源侧SD-RSRP低于所述目标侧RSRP时，确定所述源侧信道的通信状态劣于所述目标侧信道的通信状态。
  4. 根据权利要求1或2所述的方法，其中，所述目标端节点是目标测远端UE，其中，
    所述源侧信道指标包括所述源侧信道的源侧SL-RSRP或源侧SD-RSRP，所述目标侧信道指标包括所述目标侧信道的目标侧SL-RSRP或目标侧SD-RSRP，基于源侧信道指标和目标侧信道指标，确定源侧信道和目标侧信道的通信状态对比结果包括：
    在所述源侧信道指标高于所述目标侧信道指标时，确定所述源侧信道的通信状态优于所述目标侧信道的通信状态；和/或，
    在所述源侧信道指标低于所述目标侧信道指标时，确定所述源侧信道的通信状态劣于所述目标侧信道的通信状态，
    或，
    所述源侧信道指标包括所述源侧信道的源侧CBR，所述目标侧信道指标包括所述目标侧信道的目标侧CBR，基于源侧信道指标和目标侧信道指标，确定源侧信道和目标侧信道的通信状态对比结果包括：
    在所述源侧CBR低于所述目标侧CBR时，确定所述源侧信道的通信状态优于所述目标侧信道的通信状态；和/或，
    在所述源侧CBR高于所述目标侧CBR时，确定所述源侧信道的通信状态劣于所述目标侧信道的通信状态。
  5. 一种由远端UE执行的携带QoS信息的方法，包括：
    获取侧行通信DRB配置信息，所述侧行通信DRB配置信息包括指示是否需要在侧行通信SDAP数据PDU中携带QoS流标识的QoS流标识指示信息；以及
    在基于所述QoS流标识指示信息，确定需要在侧行通信数据PDU中携带QoS流标识时，构造具有QoS流标识的侧行通信SDAP数据PDU，
    所述QoS流标识指示在所述远端UE和中继UE之间承载业务数据传 输的QoS流的QoS信息，并用于所述中继UE确定在所述中继UE与对象侧节点之间承载业务数据传输的对应于该QoS流的对象侧QoS信息，
    所述远端UE与所述对象侧节点之间的QoS利用权利要求1-4中任一项所述的方法而分割为源侧QoS和对应的目标侧QoS，所述QoS流标识指示所述源侧QoS和对应的目标侧QoS中的一者，所述对象侧QoS信息为所述所述源侧QoS和对应的目标侧QoS中的另一者。
  6. 根据权利要求5所述的方法，还包括：
    在需要发送数据时，判断要发送的数据是否是需要被中继的数据；以及
    在要发送的数据是需要被中继的数据时，构造具有QoS流标识的侧行通信SDAP数据PDU。
  7. 根据权利要求5或6所述的方法，其中，所述QoS流标识指示信息是指示侧行通信SDAP数据PDU是否需要包括SDAP头的侧行通信SDAP头指示信息，所述SDAP头包括所述QoS流标识，配置具有QoS流标识的侧行通信SDAP数据PDU包括：
    按照包括SDAP头的格式来构造包括所述SDAP头的侧行通信SDAP数据PDU。
  8. 一种由中继UE执行的确定对象侧QoS信息的方法，包括：
    在对源侧信道和/或目标侧信道进行变更操作时，保存即有的源侧信道和对应的目标侧信道之间的信道映射关系，所述目标侧信道是所述中继UE与目标端节点之间的信道，所述源侧信道是源侧远端UE与所述中继UE之间的信道，所述映射关系基于源侧信道的源侧QoS和对应的所述目标侧信道的目标侧QoS确定；以及
    在从远端UE接收到数据时，根据所述信道映射关系和接收该数据的接收侧信道的接收侧QoS，确定对应于所述接收侧信道的用于向对象侧节点发送所述数据的对象侧信道，所述接收侧QoS是所述远端UE和所述对象侧节点之间的源侧QoS和目标测QoS中的一者，所述对象侧QoS是另一者，
    所述源侧QoS信息和对应的所述目标侧QoS信息是利用权利要求1-4中任一项所述的方法分割而得到的。
  9. 根据权利要求8所述的方法，其中，
    在根据所述信道映射关系不能确定出对应的对象侧信道时，基于与接收侧QoS对应的对象侧QoS，新建对应于该接收侧信道的用于向对象侧节点发送所述数据的对象侧信道，并通过该新建的对象侧信道。
  10. 一种用户设备，包括：
    处理器；以及
    存储器，存储有指令；
    其中，所述指令在由所述处理器运行时执行：根据权利要求1至4中任一项所述的方法；根据权利要求5-7中任一项所述的方法；或根据权利要求8或9所述的方法。
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