WO2023001240A1 - 由用户设备ue执行的方法及用户设备 - Google Patents

由用户设备ue执行的方法及用户设备 Download PDF

Info

Publication number
WO2023001240A1
WO2023001240A1 PCT/CN2022/107055 CN2022107055W WO2023001240A1 WO 2023001240 A1 WO2023001240 A1 WO 2023001240A1 CN 2022107055 W CN2022107055 W CN 2022107055W WO 2023001240 A1 WO2023001240 A1 WO 2023001240A1
Authority
WO
WIPO (PCT)
Prior art keywords
ptm transmission
user equipment
rlc entity
pdcp
rlc
Prior art date
Application number
PCT/CN2022/107055
Other languages
English (en)
French (fr)
Inventor
肖芳英
刘仁茂
Original Assignee
夏普株式会社
肖芳英
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 夏普株式会社, 肖芳英 filed Critical 夏普株式会社
Publication of WO2023001240A1 publication Critical patent/WO2023001240A1/zh

Links

Images

Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/32—Release of transport tunnels

Definitions

  • the present disclosure relates to the field of wireless communication technologies, and more specifically, the present disclosure relates to a method performed by a user equipment UE and the user equipment.
  • Goal A 5G Multicast Broadcast Service Architecture Improvement
  • 3rd Generation Partnership Project 3rd Generation Partnership Project: 3GPP
  • RAN#86 plenary meeting Huawei proposed the work item of NR Multicast and Broadcast Service (NR MBS) (see non-patent literature: RP-193248 : New WID: NR Multicast and Broadcast Service) was approved. This work item is intended to provide support for Objective A in the RAN.
  • This disclosure discusses related issues involved in the RAN achieving the above work objectives.
  • the purpose of the present invention is to provide a method executed by user equipment and the user equipment for improving the 5G multicast broadcast service architecture.
  • the present invention provides a method executed by user equipment and the user equipment.
  • the RLC entity for the PTM transmission of the MRB is re-established;
  • the RLC entity used for the PTM transmission of the MRB is reestablished.
  • the RLC entity of the UE or the RLC entity used for the PTM transmission receives a request from the lower layer to reestablish the RLC entity, perform the following At least one of the actions:
  • Operation I Discard all RLC SDUs, RLC SDU segments and RLC PDUs,
  • Operation III Reset all state variables to their initial values
  • the initial value of the corresponding state variable is set when PTM transmission is activated.
  • the RLC entity for the PTM transmission when the RLC entity for the PTM transmission is deactivated, the RLC entity for the PTM transmission performs the above operation I and/or the above Operation II.
  • the RLC entity for the PTM transmission when the RLC entity for the PTM transmission is activated, the RLC entity for the PTM transmission performs the above operation III.
  • the UE receives from the base station a PDCP control PDU for triggering a PDCP entity of the UE to send a PDCP status report, and the UE sends a PDCP status report to the base station.
  • the user equipment includes: a processor; and a memory storing instructions; wherein the instructions execute the method of the first aspect when executed by the processor.
  • FIG. 1 is a block diagram representing a transmission method performed by a user equipment.
  • FIG. 2 is a block diagram representing a user equipment according to an embodiment of the present invention.
  • Figure 3 is a diagram representing an example of a PDCP Control PDU used to trigger a PDCP status report.
  • UE User Equipment, user equipment.
  • RRC Radio Resource Control, radio resource control.
  • RRC_CONNECTED RRC connected state.
  • RRC_INACTIVE RRC is inactive.
  • RRC_IDLE RRC idle state.
  • RAN Radio Access Network, wireless access network.
  • New RAT new radio access technology.
  • MBMS Multimedia Broadcast/Multicast Service, multimedia broadcast multicast service.
  • MBS Multicast Broadcast Services, multicast broadcast service.
  • PDCP Packet Data Convergence Protocol, packet data convergence protocol.
  • RLC Radio Link Control, wireless link control.
  • DCI Downlink Control Information, downlink control information.
  • MAC Media Access Control, media access control.
  • SDU Service Data Unit, service data unit.
  • SDU Service Data Unit
  • PDU Protocol Data Unit, protocol data unit.
  • the data packets received or delivered by this layer from the lower layer are called PDUs.
  • RB Radio Bearer, radio bearer.
  • MRB Multicast Broadcast Services Radio Bearer, multicast broadcast service radio bearer, which is the bearer defined for MBS transmission.
  • BWP Bandwidth Part, bandwidth fragment or part of bandwidth.
  • the MBS-MCCH Multicast Control Channel, multicast control channel.
  • the MBS-MCCH is used to transmit control information related to receiving MBS services.
  • SC-MCCH Single Cell Multicast Control Channel, single cell multicast control channel.
  • TMGI Temporary Mobile Group Identity, temporary mobile group identity.
  • PLMN Public Land Mobile Network, public land mobile network.
  • RNTI Radio Network Temporary Identifier, wireless network temporary identifier.
  • PTM Point to Multipoint, point to multipoint, a delivery method of MBS business.
  • the RAN node delivers a single copy of MBS data packets over radio to a set of UEs via radio (a RAN node delivers a single copy of MBS data packets over radio to a set of UEs).
  • PTP Point to Point, point to point, a delivery method of MBS business.
  • the RAN node delivers copies of multiple MBS data packets to each UE via radio (a RAN node delivers separate copies of MBS data packet over radio to individual UE).
  • SC-PTM Single Cell Point to Multipoint, single cell point to multipoint.
  • LTE SC-PTM LTE Single Cell Point to Multipoint, long term evolution single cell point to multipoint.
  • DL-SCH DownLink Shared Channel, downlink shared channel.
  • MRB Multicast Radio Bearer, a DRB (or bearer) configured to receive MBS multicast (A DRB (or radio bearer) that is configured for MBS multicast reception).
  • MBS multicast (or multicast communication service) means that the same service and the same specific content are simultaneously provided to a group of specific UEs.
  • a multicast traffic is delivered to the UE using the multicast session.
  • a UE in RRC_CONNECTED can use PTP and/or PTM to receive a multicast communication service.
  • G-RNTI Group RNTI, group RNTI, used to scramble the scheduling and transmission of MTCH (used to scramble the scheduling and transmission of MTCH).
  • NR MBS supports 1-1 mapping between G-RNTI and MBS session (One-to-one mapping between G-RNTI and MBS session is supported in NR MBS).
  • network can be used interchangeably, and the network can be a long-term evolution LTE network, an NR network, an enhanced long-term evolution eLTE network, or other networks defined in subsequent evolution versions of 3GPP.
  • the base station broadcasts the MBMS service and its scheduling information supported by the system information and the message transmitted on the SC-MCCH channel.
  • the radio bearer configuration information used to transmit the MBMS service is predefined .
  • the UE can know the MBMS service that the current cell or base station supports or is in progress by receiving the corresponding system information and the message transmitted on the SC-MCCH.
  • the UE needs to receive a certain MBMS service, it establishes a radio bearer according to predefined parameters and receives data. In this case, UE can receive MBMS service without establishing RRC connection.
  • MBS MBS services
  • some MBS services can also be scheduled in a manner similar to SC-PTM, so that UEs in the RRC idle state and RRC inactive state can also receive the MBS services.
  • MBS services there are another part of MBS services that require the UE to establish an RRC connection with the base station, and then the base station configures for the UE through dedicated RRC signaling (also called a dedicated RRC message), and the radio bearer for receiving these MBS services can also be configured by the base station through dedicated RRC signaling.
  • the order is UE configuration.
  • FIG. 1 is a block diagram representing such a transmission method performed by a user equipment.
  • the step 101 is to establish an RRC connection between the UE and the base station, and the step 102 is to configure the base station for the UE through an RRC message, and the radio bearer for receiving these MBS services can also be configured by the base station for the UE through an RRC message.
  • the radio bearer may be an MRB configured with only PTM transmission (as shown in Figure 2a), or a split MRB (split MRB) configured with both PTM and PTP (as shown in Figure 2b) or a DRB configured with only PTP transmission (as shown in Figure 2c).
  • the bearer configured by the base station for the UE to transmit the MBS session only uses PTP transmission or the bearer is only configured with PTP transmission, the bearer is considered to be a DRB.
  • the bearers configured by the base station for the UE to transmit MBS sessions can also be considered as MRBs. At this time, only PTP transmission is used or the bearers are only configured with PTP transmission. They are also considered as MRBs. .
  • Figures 2a-2c only show the PDCP entity and RLC entity corresponding to the bearer and the relationship between them. In the downlink direction, the PDCP PDU encapsulated by the PDCP entity is delivered to the RLC entity.
  • the base station can dynamically decide whether to use PTM or PTP to transmit the MBS session.
  • PTM transmission is activated again after being deactivated, the state variables related to the RLC entity used for PTM transmission maintained by the UE side may be inconsistent with the values of the state variables related to the RLC entity used for PTM transmission maintained by the base station side, which will As a result, the RLC entity used for PTM transmission cannot receive and/or send data correctly.
  • PTM transmission when PTM transmission is deactivated, there may be data in the RLC entity buffer for PTM transmission and the related timer is running, and maintaining the state variables and timers related to the RLC entity corresponding to the deactivated PTM will lead to incorrect Necessary UE energy consumption. Examples based on two embodiments (embodiment A and embodiment B) are given below.
  • the base station explicitly sends indication information to the UE to instruct the UE to activate or deactivate the PTM transmission of an MBS session.
  • the indication information may be a medium access control element (MAC CE) or physical layer signaling (for example, the indication information is carried in DCI).
  • MAC CE medium access control element
  • DCI physical layer signaling
  • the UE when the UE receives the indication information for activating PTM transmission for an MRB, it re-establishes the RLC entity for PTM transmission of the MRB; and/or, when the UE receives the indication information for an MRB When the indication information of deactivating the PTM transmission of the MRB is used, the RLC entity used for the PTM transmission of the MRB is reestablished.
  • the MAC entity or the physical layer of the UE when the MAC entity or the physical layer of the UE receives the indication information for the activation and/or deactivation of PTM transmission for an MRB, it instructs the RLC entity used for PTM transmission of the corresponding MRB to perform re-establishment, or indicates to the upper layer to activate or deactivate the PTM transmission. Deactivate the PTM transmission of the corresponding MRB, or indicate to the RLC entity used for the PTM transmission of the MRB to activate or deactivate the PTM transmission.
  • Operation I Discard all RLC SDUs, RLC SDU segments and RLC PDUs (if there are corresponding RLC SDUs, RLC SDU segments or RLC PDUs, the corresponding operation is performed).
  • Operation II Stop and reset all timers.
  • Operation III Reset all state variables to their initial values.
  • the initial value of the corresponding state variable is set when PTM transmission is activated.
  • the RLC entity for PTM transmission When the RLC entity for PTM transmission is deactivated, the RLC entity for PTM transmission performs the above operations I and/or II. When the RLC entity for PTM transmission is activated, the RLC entity for PTM transmission performs operation III above.
  • the initial value of the RLC entity-related state variables is set according to the sequence number SN of the first received UMD PDU containing the sequence number SN.
  • the initial value of the unacknowledged mode UM reception state variables RX_Next_Reassembly and RX_Next_Highest is set to the sequence number SN of the first received UMD PDU containing the sequence number SN.
  • RX_Next_Reassembly holds the value of the earliest SN that still considers reassembly (RX_Next_Reassembly holds the value of the earliest SN that is still considered for reassembly); RX_Next_Highest saves the next SN value of the UMD PDU serial number with the largest SN among the received UMD PDUs, It serves as the upper bound of the reassembly window (holds the value of the SN following the SN of the UMD PDU with the highest SN among received UMD PDUs. It serves as the higher edge of the reassembly window).
  • the base station does not send indication information to the UE when activating or deactivating PTM transmission.
  • the PDCP entity of the UE needs to send a PDCP status report to the base station.
  • the UE cannot receive the indication information for activating or deactivating the PTM transmission, the UE cannot determine when to send the PDCP status report to the base station.
  • a field is added in the PDCP header of the PDCP data PDU to trigger the UE to send a PDCP status report.
  • the base station sets the field in the PDCP header of a PDCP data PDU to a value corresponding to triggering the UE to send a PDCP status report, for example, setting is 1.
  • the UE After receiving the PDCP data PDU in which the field triggering the PDCP status report is set, the UE sends the PDCP status report to the base station.
  • the base station may send a PDCP control PDU for triggering the UE's PDCP entity to send a PDCP status report to the UE.
  • the PDCP entity of the UE sends a PDCP status report to the base station.
  • a new PDCP control PDU type can be set to trigger a PDCP status report.
  • the receiving PDCP entity For an MRB configured with PTM transmission, if the receiving PDCP entity (the receiving PDCP entity) receives a PDCP control PDU type of 011 (or receives a PDCP status report trigger), a PDCP status report is triggered.
  • Figure 3 shows an example of a PDCP control PDU for triggering a PDCP status report.
  • the D/C field is used to indicate whether the corresponding PDCP PDU is a PDCP data PDU or a PDCP control PDU.
  • the PDU type field is used to indicate the type of control information contained in the corresponding PDCP control PDU (PDU TYPE indicates the type of control information included in the corresponding PDCP Control PDU), and the PDU type field 011 can be used to indicate that the PDU is used to trigger the UE
  • the PDCP entity sends the PDCP Status Report PDCP Control PDU.
  • the R field is a reserved bit. All R fields in the current version must be set to 0, and the receiver will ignore it when receiving the current bit. Oct means byte.
  • the base station needs to include this field in each PDCP data PDU, and set the value of this field to trigger the PDCP status when the PDCP status report needs to be obtained from the UE Report the corresponding value.
  • the base station sends the PDCP control PDU only when it needs to trigger the UE to send the PDCP status report. Therefore, compared with including a field in the PDCP data PDU to trigger the PDCP status report, it is less overhead to trigger the PDCP status report by defining a dedicated PDCP control PDU.
  • the base station activates PTM means that the PDCP entity submits the PDCP PDU to the RLC entity for PTM transmission, and the base station deactivates PTM means that the PDCP entity does not submit the PDCP PDU to the RLC entity for PTM transmission (or It means that the PDCP entity only submits the PDCP PDU to the RLC entity for PTP transmission).
  • the RLC entity used for PTM transmission in the embodiment of the present disclosure is also referred to as a PTM-associated RLC entity or a G-RNTI-configured RLC entity or a G-RNTI-associated RLC entity.
  • an MBS service (or MBS session) can be identified by an MBS identifier, and the MBS identifier can be a TMGI and/or a session identifier sessionId, where the TMGI can include a PLMN identifier and/or a service identifier, so The above service identifier uniquely identifies an MBS service within a PLMN.
  • computer-executable instructions or programs running on the device according to the present disclosure may be programs that cause a computer to realize the functions of the embodiments of the present disclosure by controlling a central processing unit (CPU).
  • the program or information processed by the program may be temporarily stored in volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory systems.
  • Computer-executable instructions or programs for implementing the functions of the various embodiments of the present disclosure can be recorded on computer-readable storage media.
  • 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” here may be a computer system embedded in the device, which may include an operating system or hardware (such as peripheral devices).
  • the "computer-readable storage 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 for example, single-chip 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 can be a microprocessor, or it can be any existing processor, controller, microcontroller, or state machine.
  • the above-mentioned circuits may be digital circuits or analog circuits. Where new integrated circuit technologies have emerged to replace existing integrated circuits due to advances in semiconductor technology, one or more embodiments of the present disclosure may also be implemented using these new integrated circuit technologies.
  • present disclosure is not limited to the above-described embodiments. Although various examples of the embodiments have been described, the present disclosure 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.

Landscapes

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

Abstract

本发明提供了一种由用户设备执行的方法以及用户设备，当UE实体接收到针对一个MRB的激活PTM传输的指示信息时，重建所述MRB的用于所述PTM传输的RLC实体；和/或，当UE接收到针对一个所述MRB的去激活所述PTM传输的指示信息时，重建所述MRB的用于所述PTM传输的RLC实体。

Description

由用户设备UE执行的方法及用户设备 技术领域
本公开涉及无线通信技术领域，更具体地，本公开涉及由用户设备UE执行的方法及用户设备。
背景技术
一项关于5G组播广播服务架构改进的研究项目SI(具体见SP-190625)已获得批准，并正在进行中。此SI的目标之一(称为目标A)是在5GS中支持通用MBS服务，已经确定的可以受益于此特性的用例包括(但不限于)公共安全、V2X应用，透明IPv4/IPv6组播传输，IPTV，无线软件传输，群组通信和物联网应用。相应的，在第三代合作伙伴计划(3rd Generation Partnership Project：3GPP)RAN#86次全会上，华为提出了NR多播和广播服务(NR MBS)的工作项目(参见非专利文献：RP-193248：New WID：NR Multicast and Broadcast Service)获得批准。该工作项目旨在RAN中提供对目标A的支持。
本公开讨论RAN达成上述工作目标所涉及的相关问题。
发明内容
本发明的目的在于提供一种对5G组播广播服务架构进行改进的由用户设备执行的方法以及用户设备。
为了解决上述问题，本发明提供了一种由用户设备执行的方法以及用户设备。
根据本发明的第一方面，当UE实体接收到针对一个MRB的激活PTM传输的指示信息时，重建所述MRB的用于所述PTM传输的RLC实体；和/或，当UE接收到针对一个所述MRB的去激活所述PTM传输的指示信息时，重建所述MRB的用于所述PTM传输的RLC实体。
根据本发明的第一方面的由用户设备执行的方法，当UE的所述RLC实体或用于所述PTM传输的所述RLC实体接收到来自下层的重建所述RLC实体的请求时，执行以下操作的至少一项：
操作I：丢弃所有的RLC SDU、RLC SDU分段和RLC PDU，
操作II：停止和重置所有定时器，
操作III：重置所有状态变量为其初始值，
对于操作III，在所述PTM传输被去激活时，对应状态变量的初始值在PTM传输激活时设置。
根据本发明的第一方面的由用户设备执行的方法，当去激活用于所述PTM传输的所述RLC实体时，用于所述PTM传输的所述RLC实体执行上述操作I和/或上述操作II。
根据本发明的第一方面的由用户设备执行的方法，当激活用于所述PTM传输的所述RLC实体时，用于所述PTM传输的所述RLC实体执行上述操作III。
根据本发明的第二方面的由用户设备执行的方法，UE从基站接收用于触发UE的PDCP实体发送PDCP状态报告的PDCP控制PDU，UE向基站发送PDCP状态报告。
根据本发明的第三方面的用户设备，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第一方面的所述方法。
发明效果
根据本发明的方案，能够提供一种对5G组播广播服务架构进行改进的由用户设备执行的方法以及用户设备。
附图说明
通过下文结合附图的详细描述，本公开的上述和其它特征将会变得更加明显，其中：
图1是表示由用户设备执行的传输方法的框图。
图2是表示根据本发明的实施例的用户设备的框图。
图3是表示用于触发PDCP状态报告的PDCP控制PDU的示例。
具体实施方式
下面结合附图和具体实施方式对本公开进行详细阐述。应当注意，本公开不应局限于下文所述的具体实施方式。另外，为了简便起见，省略了对与本公开没有直接关联的公知技术的详细描述，以防止对本公开的理解造成混淆。
下面描述本公开涉及的部分术语，术语的具体含义可参见3GPP最新相关文档，例如TS38.300、TS38.321、TS38.323、TS38.331等。此外，本公开实施例不限于广播/组播业务，也可以应用于其他应用场景。
UE：User Equipment，用户设备。
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，无线接入网。
NR：New RAT，新无线访问技术。
MBMS：Multimedia Broadcast/Multicast Service，多媒体广播多播业务。
MBS：Multicast Broadcast Services，多播广播业务。
PDCP：Packet Data Convergence Protocol，分组数据汇聚协议。
RLC：Radio Link Control，无线链路控制。
DCI：Downlink Control Information，下行控制信息。
MAC：Media Access Control，媒体访问控制。
SDU：Service Data Unit，服务数据单元。本层从上层接收或递交上层的数据包称为SDU。
PDU：Protocol Data Unit，协议数据单元。本层从下层接收或递交下层的数据包称为PDU。
RB：Radio Bearer，无线承载。
MRB：Multicast Broadcast Services Radio Bearer，多播广播业务无线承载，即为MBS传输定义的承载。
BWP：Bandwidth Part，带宽片段或部分带宽。
MCCH：Multicast Control Channel，多播控制信道。MBS-MCCH用于传输与接收MBS服务相关的控制信息。
SC-MCCH：Single Cell Multicast Control Channel，单小区多播控制信道。
TMGI：Temporary Mobile Group Identity，临时移动组标识。
PLMN：Public Land Mobile Network，公众陆地移动网。
RNTI：Radio Network Temporary Identifier，无线网络临时标识。
PTM：Point to Multipoint，点到多点，一种MBS业务的递送(deliver)方式。在PTM递送方式中，RAN节点将一份MBS数据包通过无线电递送给一组UE(a RAN node delivers a single copy of MBS data packets over radio to a set of UEs)。
PTP：Point to Point，点到点，一种MBS业务的递送方式。在PTP递送方式中，RAN节点将多个MBS数据包的副本通过无线电分别递送给每个UE(a RAN node delivers separate copies of MBS data packet over radio to individual UE)。
SC-PTM：Single Cell Point to Multipoint，单小区点到多点。
LTE SC-PTM：LTE Single Cell Point to Multipoint，长期演进单小区点到多点。
DL-SCH：DownLink Shared Channel，下行共享信道。
MRB：Multicast Radio Bearer，一个配置用于接收MBS组播的DRB(或承载)(A DRB(or radio bearer)that is configured for MBS multicast reception)。
MTCH：Multicast Traffic Channel，多播业务信道。MBS组播(或组播通信业务)是指相同的服务和相同的特定内容被同时提供给一组特定的UE。使用组播会话将一个组播通信业务递送给UE。一个处于RRC_CONNECTED的UE可以采用PTP和/或PTM来接收一个组播通信业务。
G-RNTI：Group RNTI，群组RNTI，用于加扰MTCH的调度和传输(used to scramble the scheduling and transmission of MTCH)。NR MBS支持G-RNTI和MBS会话之间1-1映射关系(One-to-one mapping between G-RNTI and MBS session is supported in NR MBS)。
本公开中，网络、基站和RAN可互换使用，所述网络可以是长期演进LTE网络、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。
在LTE SC-PTM中，基站通过系统信息及SC-MCCH信道上传输的消息广播其支持的多媒体广播多播服务MBMS业务及其调度信息，用于传输MBMS业务的无线承载配置信息是预定义的。UE通过接收对应的系统信息和SC-MCCH上传输的消息就可以知道当前小区或基站支持或正在进行的MBMS业务。当UE需要接收某个MBMS业务时，按照预定义的参数建立无线承载并接收数据。在这种情况下，UE不需要建立RRC连接就可以接收MBMS业务。
在NR MBS中，一部分MBS业务(service)也可采用与SC-PTM类似的方式调度，使得处于RRC空闲态和RRC非激活态的UE也可以接收所述MBS业务。但是，还存在另一部分MBS业务需要UE与基站建立RRC连接，然后基站通过专用RRC信令(也称为专用RRC消息)为UE配置，并且接收这些MBS业务的无线承载也可由基站通过专用RRC信令为UE配置。图1为表示这种用户设备执行的传输方法的框图。其中步骤101为UE与基站建立RRC连接，步骤102为基站通过RRC消息为UE配置，并且接收这些MBS业务的无线承载也可由基站通过RRC消息为UE配置。所述无线承载可以是仅配置了PTM传输的MRB(如图2a所示)，或同时配置了PTM和PTP的分离MRB(split MRB)(如图2b所示)或者仅配置了PTP传输的DRB(如图2c所示)。此处，如果基站为UE配置的用于传输MBS会话的承载仅采用PTP传输或所述承载仅配置了PTP传输，则认为所述承载为DRB。作为替换的实施例，在本发明中也可以将基站为UE配置的用于传输MBS会话的承载都认为是MRB，此时，仅采用PTP传输或所述承载仅配置了PTP传输也认为是MRB。此外，需要说明的是，图2a-2c仅示出了承载对应的PDCP实体和RLC实体以及两者间的关系。在下行方向上，经PDCP实体封装后的PDCP PDU递交给RLC实体。对于分离MRB，基站可以动态的决定采用PTM还是PTP传输MBS会话。当PTM传输被去激活 后再次被激活时，UE侧维护的用于PTM传输的RLC实体相关的状态变量与基站侧维护的用于PTM传输的RLC实体相关的状态变量的值可能不一致，这将导致用于PTM传输的RLC实体不能正确的进行数据的接收和/或发送。此外，当PTM传输被去激活时，用于PTM传输的RLC实体缓存区中可能存在数据并且相关的定时器正在运行，维护去激活的PTM对应的RLC实体相关的状态变量和定时器将导致不必要的UE能耗。以下给出基于两种实施方式(实施方式A和实施方式B)的实施例。
在实施方式A中，基站向UE显式的发送指示信息，以指示UE激活或去激活一个MBS会话的PTM传输。所述指示信息可以是媒体访问控制控制元素(MAC CE)或物理层信令(例如所述指示信息携带在DCI中)。
基于实施方式A，在一个实施例中，当UE接收到针对一个MRB的激活PTM传输的指示信息时，重建所述MRB的用于PTM传输的RLC实体；和/或，当UE接收到针对一个MRB的去激活PTM传输的指示信息时，重建所述MRB的用于PTM传输的RLC实体。具体地，当UE的MAC实体或物理层接收到针对一个MRB的激活和/或去激活PTM传输的指示信息时，指示对应MRB的用于PTM传输的RLC实体执行重建，或者向上层指示激活或去激活对应MRB的PTM传输，或向所述MRB的用于PTM传输的RLC实体指示激活或去激活PTM传输。当UE的RLC实体或用于PTM传输的RLC实体接收到来自下层的重建RLC实体的请求或当UE的RLC实体或用于PTM传输的RLC实体接收到去激活PTM传输的指示时，执行以下操作至少一项：
操作I：丢弃所有的RLC SDU、RLC SDU分段和RLC PDU(如果存在对应的RLC SDU、RLC SDU分段或RLC PDU才执行相应的操作)。
操作II：停止和重置所有定时器。
操作III：重置所有状态变量为其初始值。
对于操作III，在PTM传输被去激活时，对应状态变量的初始值在PTM传输激活时设置。
【上述实施例的变形实施例】
当去激活用于PTM传输的RLC实体时，用于PTM传输的RLC实体执行上述操作I和/或II。当激活用于PTM传输的RLC实体时，用于PTM传输的RLC实体执行上述操作III。
对于用于PTM传输的RLC实体，RLC实体相关的状态变量的初始值根据第一个接收到的包含序列号SN的UMD PDU的序列号SN设置。例如，非确认模式UM接收状态变量RX_Next_Reassembly和RX_Next_Highest的初始值设置为第一个接收到的包含序列号SN的UMD PDU的序列号SN。RX_Next_Reassembly保存的是仍然考虑重组的最早SN的值(RX_Next_Reassembly holds the value of the earliest SN that is still considered for reassembly)；RX_Next_Highest保存收到的UMD PDU中SN最大的UMD PDU序列号的下一个SN值，它作为重组窗口的上界(holds the value of the SN following the SN of the UMD PDU with the highest SN among received UMD PDUs.It serves as the higher edge of the reassembly window)。
在实施方式B中，基站在激活或去激活PTM传输时，不向UE发送指示信息。在所述实施方式中，为了保证MBS会话的可靠性，当激活或去激活PTM传输时，UE的PDCP实体需要向基站发送PDCP状态报告。但是，因为UE不能收到激活或去激活PTM传输的指示信息，所以UE无法确定何时向基站发送PDCP状态报告。
在一个实施例中，在PDCP数据PDU的PDCP报头中增加一个字段，用于触发UE发送PDCP状态报告。当激活或去激活PTM传输时或基站认为需要触发UE发送PDCP状态报告时，基站将一个PDCP数据PDU的PDCP报头中的所述字段设置为用于触发UE发送PDCP状态报告对应的值，例如设置为1。UE在接收到所述设置了触发PDCP状态报告的字段的PDCP数据PDU后，向基站发送PDCP状态报告。
在一个实施例中，当激活或去激活PTM传输时或基站认为需要触发UE发送PDCP状态报告时，基站可以向UE发送用于触发UE的PDCP实体发送PDCP状态报告的PDCP控制PDU。UE的PDCP实体在接收到所述PDCP控制PDU时，向基站发送PDCP状态报告。例如，可以通过设置一个新的PDCP控制PDU类型用于触发PDCP状态报告。对于配置了PTM 传输的MRB，如果接收PDCP实体(the receiving PDCP entity)接收到PDCP控制PDU的类型为011(或接收到PDCP状态报告触发)，则触发PDCP状态报告。
图3给出了用于触发PDCP状态报告PDCP控制PDU的示例。D/C字段用于指示对应的PDCP PDU是PDCP数据PDU还是PDCP控制PDU。PDU类型字段用于指示包含在对应PDCP控制PDU中的控制信息的类型(PDU TYPE indicates the type of control information included in the corresponding PDCP Control PDU)，可以将PDU类型字段011表示该PDU为用于触发UE的PDCP实体发送PDCP状态报告的PDCP控制PDU。R字段是保留比特，当前版本中所有的R字段必须设置为0，接收方在接收到当前比特时将忽略。Oct表示字节。
如果采用在PDCP数据PDU中包含一个字段用来触发PDCP状态报告，那么基站需要在每个PDCP数据PDU中都包含这个字段，在需要从UE获取PDCP状态报告时设置这个字段的值为触发PDCP状态报告对应的值。而采用新的PDCP控制PDU类型来触发PDCP状态报告时，基站仅在需要触发UE发送PDCP状态报告时才发送这个PDCP控制PDU。因此与在PDCP数据PDU中包含一个字段用来触发PDCP状态报告相比，通过定义一个专用PDCP控制PDU来来触发PDCP状态报告开销更小。
在本公开实施例中，基站激活PTM是指PDCP实体将PDCP PDU递交给用于PTM传输的RLC实体，基站去激活PTM是指PDCP实体不将PDCP PDU递交给用于PTM传输的RLC实体(或者是指PDCP实体仅将PDCP PDU递交给用于PTP传输的RLC实体)。本公开实施例中用于PTM传输的RLC实体也称为PTM关联的RLC实体或配置了G-RNTI的RLC实体或关联了G-RNTI的RLC实体。
需要说明的是，一个MBS业务(或称为MBS会话)可通过一个MBS标识来标识，所述MBS标识可以是TMGI和/或会话标识sessionId，其中TMGI可以包括PLMN标识和/或服务标识，所述服务标识在一个PLMN内唯一标识一个MBS业务。
另外，运行在根据本公开的设备上的计算机可执行指令或者程序可以是通过控制中央处理单元(CPU)来使计算机实现本公开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。
用于实现本公开各实施例功能的计算机可执行指令或程序可以记录在计算机可读存储介质上。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)。“计算机可读存储介质”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，本公开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，本公开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，但本公开并不局限于此。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，已经参考附图对本公开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，本公开也包括不偏离本公开主旨的任何设计改动。另外，可以在权利要求的范围内对本公开进行多种改动，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公开的技术范围内。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 (6)

  1. 一种由用户设备执行的方法，其特征在于，
    当UE实体接收到针对一个MRB的激活PTM传输的指示信息时，重建所述MRB的用于所述PTM传输的RLC实体；和/或，
    当UE接收到针对一个所述MRB的去激活所述PTM传输的指示信息时，重建所述MRB的用于所述PTM传输的RLC实体。
  2. 根据权利要求1所述的由用户设备执行的方法，其特征在于，
    当UE的所述RLC实体或用于所述PTM传输的所述RLC实体接收到来自下层的重建所述RLC实体的请求时，执行以下操作的至少一项：
    操作I：丢弃所有的RLC SDU、RLC SDU分段和RLC PDU，
    操作II：停止和重置所有定时器，
    操作III：重置所有状态变量为其初始值，
    对于操作III，在所述PTM传输被去激活时，对应状态变量的初始值在PTM传输激活时设置。
  3. 根据权利要求2所述的由用户设备执行的方法，其特征在于，
    当去激活用于所述PTM传输的所述RLC实体时，用于所述PTM传输的所述RLC实体执行上述操作I和/或上述操作II。
  4. 根据权利要求2所述的由用户设备执行的方法，其特征在于，
    当激活用于所述PTM传输的所述RLC实体时，用于所述PTM传输的所述RLC实体执行上述操作III。
  5. 一种由用户设备执行的方法，其特征在于，
    UE从基站接收用于触发UE的PDCP实体发送PDCP状态报告的PDCP控制PDU，
    UE向基站发送PDCP状态报告。
  6. 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5中的任一项所述的方法。
PCT/CN2022/107055 2021-07-23 2022-07-21 由用户设备ue执行的方法及用户设备 WO2023001240A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110841909.X 2021-07-23
CN202110841909.XA CN115696642A (zh) 2021-07-23 2021-07-23 由用户设备ue执行的方法及用户设备

Publications (1)

Publication Number Publication Date
WO2023001240A1 true WO2023001240A1 (zh) 2023-01-26

Family

ID=84979723

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/107055 WO2023001240A1 (zh) 2021-07-23 2022-07-21 由用户设备ue执行的方法及用户设备

Country Status (2)

Country Link
CN (1) CN115696642A (zh)
WO (1) WO2023001240A1 (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101116277A (zh) * 2005-02-07 2008-01-30 三星电子株式会社 用于请求/传送移动通信系统的状态报告的方法和设备
CN107950071A (zh) * 2015-08-27 2018-04-20 联发科技股份有限公司 用于lte‑wlan聚合的动态pdcp状态报告轮询的方法
CN108029158A (zh) * 2015-09-25 2018-05-11 捷开通讯(深圳)有限公司 用于报告数据接收状态的系统及方法
CN108401484A (zh) * 2017-08-21 2018-08-14 北京小米移动软件有限公司 数据传输方法及装置
CN109151891A (zh) * 2017-06-15 2019-01-04 华为技术有限公司 一种通信处理方法和通信装置
CN110574487A (zh) * 2017-05-05 2019-12-13 高通股份有限公司 分组数据汇聚协议(pdcp)实体处的分组重复

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101116277A (zh) * 2005-02-07 2008-01-30 三星电子株式会社 用于请求/传送移动通信系统的状态报告的方法和设备
CN107950071A (zh) * 2015-08-27 2018-04-20 联发科技股份有限公司 用于lte‑wlan聚合的动态pdcp状态报告轮询的方法
CN108029158A (zh) * 2015-09-25 2018-05-11 捷开通讯(深圳)有限公司 用于报告数据接收状态的系统及方法
CN110574487A (zh) * 2017-05-05 2019-12-13 高通股份有限公司 分组数据汇聚协议(pdcp)实体处的分组重复
CN109151891A (zh) * 2017-06-15 2019-01-04 华为技术有限公司 一种通信处理方法和通信装置
CN108401484A (zh) * 2017-08-21 2018-08-14 北京小米移动软件有限公司 数据传输方法及装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUAWEI, CBN, HISILICON: "PTP/PTM dynamic switch and MRB initialization", 3GPP DRAFT; R2-2103524, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. electronic; 20210412 - 20210420, 2 April 2021 (2021-04-02), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052175024 *

Also Published As

Publication number Publication date
CN115696642A (zh) 2023-02-03

Similar Documents

Publication Publication Date Title
JP2023518859A (ja) マルチキャスト／ブロードキャストサービス配信の動的変更
WO2022078384A1 (zh) 用户设备执行的传输方法、用户设备、基站以及基站执行的传输方法
WO2022078328A1 (zh) 用户设备执行的传输方法、用户设备、基站以及基站执行的传输方法
JP2023165045A (ja) 端末装置、基地局装置および、方法
WO2023001240A1 (zh) 由用户设备ue执行的方法及用户设备
WO2022138450A1 (ja) 通信制御方法及びユーザ装置
WO2022080300A1 (ja) 端末装置および方法
US20230396367A1 (en) Terminal apparatus, base station apparatus, and method
WO2022085664A1 (ja) 端末装置、基地局装置、および方法
WO2021221009A1 (ja) 端末装置、方法、および、集積回路
WO2021155547A1 (zh) 数据接收方法、装置、设备及存储介质
WO2023036173A1 (zh) 状态报告发送方法、无线承载重传执行方法及用户设备
CN116114373A (zh) 终端装置、基站装置以及方法
WO2023036287A1 (zh) 用户设备执行的方法、基站的传输方法及用户设备
CN116158093A (zh) 终端装置、基站装置以及方法
WO2024032500A1 (zh) 由用户设备执行的方法以及用户设备
JP7481588B2 (ja) 通信方法、ユーザ装置、移動通信システム、チップセット、及びプログラム
WO2023066188A1 (zh) 进行小区切换的方法及用户设备
WO2024032544A1 (zh) 由用户设备执行的处理寻呼消息的方法及用户设备
WO2022138567A1 (ja) 端末装置、基地局装置、および方法
WO2022255293A1 (ja) 端末装置、基地局装置、および方法
WO2023276947A1 (ja) 端末装置、基地局装置、および方法
WO2022255279A1 (ja) 端末装置、基地局装置、および方法
WO2022255303A1 (ja) 端末装置、基地局装置、および方法
WO2022255305A1 (ja) 端末装置、基地局装置、および方法

Legal Events

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

Ref document number: 22845403

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE