WO2022057857A1 - 用户设备及其方法、基站及其方法 - Google Patents

用户设备及其方法、基站及其方法 Download PDF

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Publication number
WO2022057857A1
WO2022057857A1 PCT/CN2021/118751 CN2021118751W WO2022057857A1 WO 2022057857 A1 WO2022057857 A1 WO 2022057857A1 CN 2021118751 W CN2021118751 W CN 2021118751W WO 2022057857 A1 WO2022057857 A1 WO 2022057857A1
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Prior art keywords
mbs
base station
type
service
system information
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PCT/CN2021/118751
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English (en)
French (fr)
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肖芳英
刘仁茂
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夏普株式会社
肖芳英
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Publication of WO2022057857A1 publication Critical patent/WO2022057857A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0007—Control or signalling for completing the hand-off for multicast or broadcast services, e.g. MBMS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • 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
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • 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
    • 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
    • H04W88/08—Access point devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present disclosure relates to the technical field of wireless communication, and more particularly, to a user equipment and a method thereof, a base station and a method thereof.
  • NR MBS NR Multicast and Broadcast Service
  • RP -193248 New WID: NR Multicast and Broadcast Service
  • One of the work objectives of the corresponding research project is to support MBS services in 5G systems (5GS) including public safety, V2X applications, IPTV, groups Communication, IoT applications, etc.
  • the scope of the work items specified in RP-193248 is the support or capability that needs to be provided in the Radio Access Network (RAN) to achieve the above objectives of SA2.
  • RAN Radio Access Network
  • one of the work objectives defined in RP-193248 is to define a group scheduling mechanism for UEs in RRC_CONNECTED state, so that these UEs can receive broadcast/multicast services.
  • This disclosure discusses related issues involved in achieving the above-mentioned work objectives.
  • the present disclosure provides a user equipment and a method thereof, a base station and a method thereof.
  • a user equipment and a method thereof By indicating the MBS supported by the base station in the system information and/or the MBSConfiguration message, it can reduce the need for the UE to obtain information about the base station.
  • the supported MBS delay saves UE energy consumption.
  • a method performed by a user equipment UE comprising: receiving system information and/or an MBSConfiguration message transmitted on a multicast broadcast service-multicast control channel MBS-MCCH from a base station, and at The MBS type supported by the base station is indicated in the system information and/or the MBSConfiguration message; and according to the MBS type supported by the base station, an operation corresponding to receiving the MBS is performed.
  • the MBS type may include a first type of MBS service and a second type of MBS service, and the relevant information of the first type of MBS service is broadcast in system information or a message transmitted on the MBS-MCCH, so The relevant information of the second type of MBS service is configured for the UE through dedicated radio resource control RRC signaling.
  • the first type of MBS service may be indicated in an MBSConfiguration message, and the second type of MBS service may be indicated in system information; or both the first type of MBS service and the second type of MBS service may be It is indicated in the MBSConfiguration message; or both the first type of MBS service and the second type of MBS service are indicated in system information.
  • the MBS type supported by the base station may be indicated by at least any one of the following manners: by whether the MBS identifier is included in the system information to indicate; by whether to configure certain or several MBS service-related parameters to indicate implicitly; to indicate explicitly through a flag; to indicate through the value of the bit in the bitmap.
  • the UE may establish an RRC connection with the base station when the system information and/or the MBSConfiguration message includes the MBS service that the UE is interested in and the MBS service is the second type of MBS service.
  • the UE may report the MBS service of interest to the base station in any of the following situations: the UE has successfully established an RRC connection; the UE has not yet reported the MBS service of interest after establishing the RRC connection; The MBS service that UE is interested in has changed.
  • an RRC reconfiguration message from the base station may be received, where the reconfiguration message includes configuration information of a radio bearer corresponding to the MBS service that the UE is interested in.
  • a user equipment comprising: a processor; and a memory storing instructions; wherein the instructions, when executed by the processor, perform the above method.
  • a method performed by a base station comprising: generating system information and/or an MBSConfiguration message transmitted on a multicast broadcast service-multicast control channel MBS-MCCH, where the system information and and/or the MBSConfiguration message indicates the MBS type supported by the base station; and sends the system information and/or the MBSConfiguration message, so that the user equipment UE performs operations corresponding to receiving MBS according to the MBS type supported by the base station.
  • a base station comprising: a processor; and a memory storing instructions; wherein the instructions, when executed by the processor, perform the above method.
  • the delay for the UE to obtain the MBS supported by the base station is reduced, and the energy consumption of the UE is saved.
  • FIG. 1 shows a flowchart of a method 100 in a user equipment UE based on an embodiment of the present disclosure.
  • FIG. 2 shows a block diagram of a user equipment 20 based on an embodiment of the present disclosure.
  • FIG. 3 shows a flowchart of a method 300 in a base station according to an embodiment of the present disclosure.
  • FIG. 4 shows a block diagram of a base station 40 based on an embodiment of the present disclosure.
  • FIG. 5 shows a schematic diagram of an embodiment of the present disclosure.
  • NAS Non-access stratum, non-access stratum.
  • AS access stratum, access layer.
  • RRC Radio Resource Control, radio resource control.
  • RRC_CONNECTED RRC connected state.
  • RRC_INACTIVE RRC inactive state.
  • RRC_IDLE RRC idle state.
  • Radio Access Network radio access network
  • New RAT New Radio Access Technology.
  • MBMS Multimedia Broadcast/Multicast Service, multimedia broadcast and multicast service.
  • MBS Multicast and Broadcast Services, multicast broadcasting service.
  • RB Radio Bearer, wireless bearer.
  • the MBS-MCCH Multicast Control Channel, Multicast Control Channel.
  • the MBS-MCCH is used to transmit control information related to receiving MBS services.
  • 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.
  • network base station, and RAN are used interchangeably, and the network may be a long-term evolution LTE network, an NR network, an enhanced long-term evolution eLTE network, or other networks defined in subsequent 3GPP evolution releases.
  • the base station broadcasts its supported MBMS service and its scheduling information through system information and messages 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 supported or ongoing by the current cell or base station 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 and receives data according to predefined parameters. In this case, the UE can receive the MBMS service without establishing an RRC connection.
  • MBS MBS services
  • some MBS services can also be scheduled in a manner similar to SC-PTM, so that UEs in RRC idle state and RRC inactive state can also receive the MBS services.
  • MBS services there is another part of MBS services that requires the UE to establish an RRC connection with the base station, and then the base station configures the UE for the UE through dedicated RRC signaling, and the radio bearer for receiving these MBS services can also be configured for the UE by the base station through dedicated RRC signaling.
  • the UE differentiates the two types of MBS services so that the UE decides whether to enter the RRC connected state and whether to establish and configure a radio bearer with predefined parameters to receive the interested MBS services is a problem that needs to be solved.
  • two types of MBS services are defined, that is, the first type of MBS service and the second type of MBS service.
  • the relevant information of the first type of MBS service is broadcast in the message transmitted on the system information SIB or MBS-MCCH.
  • the relevant information of the second type of MBS service is configured for the UE through dedicated RRC signaling. In other words, if the UE is interested in the second type of MBS service, the UE needs to establish an RRC connection with the base station first.
  • the relevant information of the first type of MBS service and the second type of MBS service may include one or more of the following: the public RNTI (denoted as g-RNTI) corresponding to each MBS session or service, the Time domain and/or frequency domain scheduling information, session identification or service identification, logical channel identification for transmitting the session or service user data, and the like.
  • the configuration information for example, RLC configuration, sequence number length configuration, etc.
  • the radio bearer can be configured by the base station for the UE through dedicated RRC signaling.
  • an MBS service or session can be identified by an MBS identifier, and the MBS identifier can be TMGI and/or session identifier sessionId, wherein TMGI can include PLMN identifier and/or service identifier, and the service identifier is in a Uniquely identifies an MBS service within the PLMN.
  • the total number of the MBS services of the first type and the MBS services of the second type indicated by the base station does not exceed the maximum number of MBSs that the system can support, and this value can be predefined.
  • FIG. 1 shows a flowchart of a method 100 in a user equipment UE based on an embodiment of the present disclosure.
  • step S101 the system information and/or the MBSConfiguration message transmitted on the MBS-MCCH is received from the base station, and the MBS type supported by the base station is indicated in the system information and/or the MBSConfiguration message.
  • step S102 according to the MBS type supported by the base station, an operation corresponding to receiving the MBS is performed.
  • the delay for the UE to obtain the MBS supported by the base station is reduced, and the energy consumption of the UE is saved.
  • FIG. 2 shows a block diagram of a user equipment 20 according to an embodiment of the present disclosure.
  • the user equipment 20 includes a processor 201 and a memory 202 .
  • the processor 201 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like.
  • the memory 202 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 systems, or the like.
  • Program instructions are stored on the memory 202 . When the instructions are executed by the processor 201, the above-mentioned method in the user equipment described in detail in the present disclosure can be executed.
  • FIG. 3 shows a flowchart of a method 300 in a base station based on an embodiment of the present disclosure.
  • step S301 system information and/or an MBSConfiguration message transmitted on the MBS-MCCH is generated, and the system information and/or the MBSConfiguration message indicates the MBS type supported by the base station.
  • step S302 the system information and/or the MBSConfiguration message is sent, so that the user equipment UE performs an operation corresponding to receiving the MBS according to the MBS type supported by the base station.
  • the delay for the UE to obtain the MBS supported by the base station is reduced, and the energy consumption of the UE is saved.
  • FIG. 4 shows a block diagram of a base station 40 according to an embodiment of the present disclosure.
  • the base station 40 includes a processor 401 and a memory 402 .
  • the base station 40 in the present disclosure can be any type of base station, including but not limited to: Node B, enhanced base station eNB, or 5G communication system base station gNB, or micro base station, pico base station, macro base station, home base station Wait.
  • the processor 401 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like.
  • the memory 402 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 systems, or the like.
  • Program instructions are stored on the memory 402 . When the instructions are executed by the processor 401, the above-mentioned method in the base station described in detail in the present disclosure can be executed.
  • FIG. 5 shows a schematic diagram of an embodiment of the present disclosure.
  • step 001 the user equipment UE receives system information from the base station and/or an RRC message transmitted on the MBS-MCCH, where the RRC message is recorded as an MBSConfiguration message.
  • the following specifically describes the method for the base station to indicate the first type of MBS service and/or the second type of MBS service supported by the base station through the system information and/or the MBSConfiguration message transmitted on the MBS-MCCH.
  • the MBSConfiguration message contains control information applied to the MBS service transmitted over the radio bearer MRB.
  • the first type of MBS service supported by the base station is indicated in the MBS-MCCH
  • the second type of MBS service is indicated in the system information SIB.
  • the system information includes a field (denoted as mbsForRRCConnected), the field indicates the second type of MBS service or session list supported by the base station, and each element in the list is an MBS identifier.
  • the system information may also include information required to obtain MBS control information corresponding to the first type of MBS service, and the MBS control information or the message MBSConfiguration including the MBS control information is transmitted on the logical channel MBS-MCCH.
  • the MBSConfiguration message may include the MBS identifier corresponding to the first type of MBS service supported by the base station, the time domain and/or frequency domain scheduling information of the first type of MBS service and/or the public RNTI and/or the user for transmitting the session or service The logical channel identification of the data, etc.
  • the MBS service of the first type or the MBS service of the second type supported by the base station may also be described as the MBS service of the first type or the MBS service of the second type that is being started or is about to start.
  • the first type of MBS service and the second type of MBS service supported by the base station are indicated in the RRC message transmitted on the MBS-MCCH, the RRC message is recorded as the MBSConfiguration message, and the MBS-MCCH or the scheduling information of the MBSConfiguration message transmitted on it Indicated in system information (similar to LTE SC-PTM).
  • the MBSConfiguration message includes a field (referred to as mbsForRRCConnected), the field indicates a second type MBS session (session) list supported by the base station, and each element in the list is an MBS identifier.
  • the corresponding MBS session is the first type of MBS service or the second type of MBS service by whether to configure the relevant parameters of one or several MBS services. For example, if the configuration information corresponding to a certain MBS session does not include the common RNTI field g-RNTI, it is considered that this MBS session is the second type of MBS.
  • the public RNTI is used to scramble data corresponding to the corresponding MBS session, and the UE receives the corresponding MBS session by detecting the public RNTI.
  • the configuration information corresponding to the MBS session may also include an explicit identifier indicating whether the corresponding MBS session is the first type of MBS service or the second type of MBS service, or an identifier displayed to indicate that the corresponding MBS session is the second type of MBS service. , in this case, if the configuration of an MBS session does not contain the identifier, it is the first type of MBS service.
  • the first type of MBS service and the second type of MBS service described in the present disclosure are both for MBS sessions.
  • the system information includes two fields, one field is used to indicate the first type of MBS session list supported by the base station, and the other field is used to indicate the second type of MBS service or session list supported by the base station.
  • Each element in the list is an MBS identifier.
  • the system information includes a list of MBS services or sessions supported by the base station, and for each element in the list, it is respectively indicated whether it is the first type of MBS service or the second type of MBS service.
  • the corresponding MBS service or session contains an explicit identification indicating whether the corresponding MBS service or session is the first type of MBS service or the second type of MBS service, or includes an explicit identification indicating that the corresponding MBS service or session is the second type of MBS service.
  • the configuration of an MBS service or session does not contain the identifier, it is the first type of MBS service.
  • the bits in the bitmap correspond to the elements in the MBS service or session list one-to-one, and different values of the bitmap identify the type of the MBS service or session. For example, if the value in the bitmap is 1, it means that the corresponding MBS service or session is the first type of MBS service, and the value of 0 means that the corresponding MBS service or session is the second type of MBS service, and vice versa.
  • step 002 if the system information and/or the MBSConfiguration message includes the MBS service or session that the UE is interested in, and the MBS service or session is the second type of MBS service, the UE establishes an RRC connection with the base station.
  • the UE For the specific process of establishing an RRC connection between the UE and the base station, see the latest document of 3GPP TS38.331. It should be noted that a new connection establishment reason can be defined for the establishment of the RRC connection establishment process triggered by the need to receive MBS services, or the reason "mt-Access" defined in the current 3GPP protocol can be used, and the establishment of an RRC connection includes being in RRC IDLE.
  • the corresponding EstablishmentCause is set to receive the new reason defined by MBS or the reason "mt-Access" defined in the current 3GPP protocol, or the request message for continuing a suspended RRC connection
  • the corresponding ResumeCause is set as the new reason defined for receiving the MBS or the reason "mt-Access" defined in the current 3GPP protocol.
  • step 003 the UE reports (also referred to as indicating) the MBS services that it is interested in to the base station.
  • the UE when the base station is configured to report the MBS service or session of interest, the UE can indicate the MBS service or session of interest to the base station through the UEAssistanceInformation message used to indicate UE assistance information, and in the MBS service or session of interest to the base station When the service or session changes, it re-reports the MBS service or session that it is interested in.
  • a new RRC message can also be defined for the UE to report the MBS service or session that it is interested in.
  • Triggering the UE to report the MBS service or session of interest may be one of the following situations: the UE successfully establishes an RRC connection, the UE has not reported the MBS service or session of interest since the establishment of the RRC connection, or the interest of the UE changes.
  • the UE receives an RRC reconfiguration message from the base station.
  • the reconfiguration message includes configuration information of the radio bearer corresponding to the MBS session of which it is interested.
  • the UE receives an RRC reconfiguration message from the base station, where the message includes configuration information of the radio bearer corresponding to the MBS service or session, and the configuration information includes the MBS service or session associated with the radio bearer, which may be the The MBS identifier corresponding to the MBS service or session.
  • the MBS service or session is one of the second type of MBS services or sessions obtained by the UE in step 001 .
  • the delay for the UE to obtain the MBS service supported by the base station is reduced, and the energy consumption of the UE is saved.
  • the computer-executable instructions or programs running on the apparatus according to the present disclosure may be programs that cause the computer to implement 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 (eg, random access memory RAM), a hard disk drive (HDD), non-volatile memory (eg, flash memory), or other memory systems.
  • Computer-executable instructions or programs for implementing the functions of various embodiments of the present disclosure may be recorded on a computer-readable storage 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” here may be a computer system embedded in the device, which may include an operating system or hardware (eg, 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 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. In the event that new integrated circuit technologies emerge as a result of advances in semiconductor technology to replace existing integrated circuits, one or more embodiments of the present disclosure may also be implemented using these new integrated circuit technologies.

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Abstract

本公开提供一种用户设备及其方法、基站及其方法。由用户设备执行的方法，包括：从基站接收系统信息和/或在多播广播业务-多播控制信道MBS-MCCH上传输的MBSConfiguration消息，在该系统信息和/或MBSConfiguration消息中指示了基站支持的MBS类型；以及根据基站支持的MBS类型，进行与接收MBS相应的操作。由此，通过在系统信息和/或MBSConfiguration消息中指示基站所支持的MBS，能够减少UE获取基站所支持的MBS的时延，节省UE能耗。

Description

用户设备及其方法、基站及其方法 技术领域
本公开涉及无线通信技术领域，更具体地，本公开涉及用户设备及其方法、基站及其方法。
背景技术
2019年12月，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)，并获批准。在SA2中对应的研究项目(见SP-190726)的工作目标之一(在SA2中称为Objective A)是在5G系统(5GS)中支持MBS服务，包括公共安全、V2X应用、IPTV、群组通信、物联网应用等。RP-193248中规定的工作项目的范围是为达成SA2上述目标在无线接入网(RAN)需要提供的支持或能力。具体的，RP-193248中定义的工作目标之一是对处于无线资源控制连接态RRC_CONNECTED的UE，定义群组调度机制使得这些UE可以接收广播/多播业务。
本公开讨论达成上述工作目标所涉及的相关问题。
发明内容
为了解决现有技术中的上述问题，本公开提供了一种用户设备及其方法、基站及其方法，通过在系统信息和/或MBSConfiguration消息中指示基站所支持的MBS，能够减少UE获取基站所支持的MBS的时延，节省UE能耗。
根据本公开的第一方面，提供了一种由用户设备UE执行的方法，包括：从基站接收系统信息和/或在多播广播业务-多播控制信道MBS-MCCH上传输的MBSConfiguration消息，在该系统信息和/或MBSConfiguration消息中指示了基站支持的MBS类型；以及根据基站支持的MBS类型，进行与 接收MBS相应的操作。
在上述方法中，可以是，所述MBS类型包括第一类MBS业务和第二类MBS业务，所述第一类MBS业务的相关信息在系统信息或MBS-MCCH上传输的消息中广播，所述第二类MBS业务的相关信息通过专用无线资源控制RRC信令为UE配置。
在上述方法中，可以是，所述第一类MBS业务在MBSConfiguration消息中指示，所述第二类MBS在系统信息中指示；或者所述第一类MBS业务和所述第二类MBS业务均在MBSConfiguration消息中指示；或者所述第一类MBS业务和所述第二类MBS业务均在系统信息中指示。
在上述方法中，可以是，利用如下方式中的至少任一种来指示基站支持的MBS类型：通过MBS标识是否包含在系统信息中来指示；通过是否配置某个或某几个MBS业务相关参数来隐式指示；通过一个标识来显式指示；通过位图中的位的取值来指示。
在上述方法中，可以是，在所述系统信息和/或MBSConfiguration消息中包含UE感兴趣的MBS业务且该MBS业务是第二类MBS业务的情况下，UE与基站建立RRC连接。
在上述方法中，可以是，在下述情况中的任一种情况下，UE向基站上报感兴趣的MBS业务：UE成功建立了RRC连接；UE在建立RRC连接之后尚未上报感兴趣的MBS业务；UE感兴趣的MBS业务发生了变化。
在上述方法中，可以是，接收来自基站的RRC重配置消息，该重配置消息中包含UE感兴趣的MBS业务对应的无线承载的配置信息。
根据本公开的第二方面，提供了一种用户设备，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方法。
根据本公开的第三方面，提供了一种由基站执行的方法，包括：生成系统信息和/或在多播广播业务-多播控制信道MBS-MCCH上传输的MBSConfiguration消息，在该系统信息和/或MBSConfiguration消息中指示了基站支持的MBS类型；以及发送所述系统信息和/或MBSConfiguration消息，使用户设备UE根据基站支持的MBS类型来进行与接收MBS相应的操作。
根据本公开的第四方面，提供了一种基站，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方法。
发明效果
根据本公开，通过在系统信息和/或MBSConfiguration消息中指示基站所支持的MBS，减少了UE获取基站所支持的MBS的时延，节省了UE能耗。
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表示基于本公开的实施例的用户设备UE中的方法100的流程图。
图2表示基于本公开的实施例的用户设备20的框图。
图3表示基于本公开的实施例的基站中的方法300的流程图。
图4表示基于本公开的实施例的基站40的框图。
图5示出了本公开实施例的示意图。
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，术语的具体含义见3GPP最新相关文档，例如TS38.300、TS38.331、TS36.300、TS36.331等。
NAS：Non-access stratum，非接入层。
AS：access stratum，接入层。
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 and Broadcast Services，多播广播业务。
RB：Radio Bearer，无线承载。
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。
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。
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。UE如何区分这两类MBS业务，以便UE决定是否进入RRC连接态以及是否采用预定义的参数建立和配置无线承载以接收感兴趣的MBS业务是需要解决的问题。
在本公开实施例中，定义了两类MBS业务，即第一类MBS业务和第二类MBS业务。第一类MBS业务的相关信息在系统信息SIB或MBS-MCCH上传输的消息中广播。第二类MBS业务的相关信息通过专用RRC信令为UE配置。换言之，如果UE对第二类MBS业务感兴趣，那么 UE需要先与基站建立RRC连接。所述第一类MBS业务和第二类MBS业务的相关信息可以包括以下一项或多项：每个MBS会话或业务对应的公共RNTI(记为g-RNTI)，每个MBS会话或业务的时域和/或频域调度信息、会话标识或业务标识、用于传输该会话或业务用户数据的逻辑信道标识等。此外，用于递送(delivery)第一类MBS业务的无线承载的配置信息(例如，RLC配置，序列号长度配置等)可以预定义(specified)；用于递送(delivery)第二类MBS业务的无线承载可由基站通过专用RRC信令为UE配置。
需要说明的是，一个MBS业务或会话可通过一个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。
此外，需要说明的是，基站指示的所支持的第一类MBS业务和第二类MBS业务的总数不超过系统可支持的MBS数的最大值，这个值可以预定义。
图1示出了基于本公开的实施例的用户设备UE中的方法100的流程图。在步骤S101中，从基站接收系统信息和/或在MBS-MCCH上传输的MBSConfiguration消息，在该系统信息和/或MBSConfiguration消息中指示了基站支持的MBS类型。在步骤S102中，根据基站支持的MBS类型，进行与接收MBS相应的操作。
根据上述方法100，通过在系统信息和/或MBSConfiguration消息中指示基站所支持的MBS，减少了UE获取基站所支持的MBS的时延，节省了UE能耗。
图2示出了根据本公开的实施例的用户设备20的框图。如图2所示，该用户设备20包括处理器201和存储器202。处理器201例如可以包括微处理器、微控制器、嵌入式处理器等。存储器202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)、或其他存储器系统等。存储器202上存储有程序指令。该指令在由处理器201运行时，可以执行本公开详细描述的用户设备中的上述方法。
图3示出了基于本公开的实施例的基站中的方法300的流程图。在步骤S301中，生成系统信息和/或在MBS-MCCH上传输的MBSConfiguration消息，在该系统信息和/或MBSConfiguration消息中指示了基站支持的MBS类型。在步骤S302中，发送所述系统信息和/或MBSConfiguration消息，使用户设备UE根据基站支持的MBS类型来进行与接收MBS相应的操作。
根据上述方法300，通过在系统信息和/或MBSConfiguration消息中指示基站所支持的MBS，减少了UE获取基站所支持的MBS的时延，节省了UE能耗。
图4示出了根据本公开实施例的基站40的框图。如图4所示，该基站40包括处理器401和存储器402。如上述所述，本公开中的基站40可以是任何类型基站，包含但不限于：Node B、增强基站eNB，也可以是5G通信系统基站gNB、或者微基站、微微基站、宏基站、家庭基站等。处理器401例如可以包括微处理器、微控制器、嵌入式处理器等。存储器402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)、或其他存储器系统等。存储器402上存储有程序指令。该指令在由处理器401运行时，可以执行本公开详细描述的基站中的上述方法。
图5示出了本公开实施例的示意图。
在步骤001，用户设备UE接收来自基站的系统信息和/或在MBS-MCCH上传输的RRC消息，所述RRC消息记为MBSConfiguration消息。
以下具体描述基站通过系统信息和/或MBS-MCCH上传输的MBSConfiguration消息指示其支持的第一类MBS业务和/或第二类MBS业务的方法。所述MBSConfiguration消息包含应用于通过无线承载MRB传输的MBS业务的控制信息。
实施例1
基站支持的第一类MBS业务在MBS-MCCH中指示，第二类MBS业务在系统信息SIB中指示。具体的，系统信息中包含一个字段(记为mbsForRRCConnected)，所述字段指示基站支持的第二类MBS业务或会话 (session)列表，列表中的每个元素为MBS标识。系统信息中还可以包含获取第一类MBS业务对应的MBS控制信息所需要的信息，所述MBS控制信息或包含MBS控制信息的消息MBSConfiguration在逻辑信道MBS-MCCH上传输。MBSConfiguration消息中可包含基站支持的第一类MBS业务对应的MBS标识及所述第一类MBS业务时域和/或频域调度信息和/或公共RNTI和/或用于传输该会话或业务用户数据的逻辑信道标识等。
在本公开中，基站支持的第一类MBS业务或第二类MBS业务也可以描述为正在进行或即将开始的第一类MBS业务或第二类MBS业务。
实施例2
基站支持的第一类MBS业务和第二类MBS业务都在MBS-MCCH上传输的RRC消息中指示，所述RRC消息记为MBSConfiguration消息，而MBS-MCCH或其上传输的MBSConfiguration消息的调度信息在系统信息中指示(可以采用LTE SC-PTM类似的方式)。具体的，MBSConfiguration消息中包含一个字段(记为mbsForRRCConnected)，所述字段指示基站支持的第二类MBS会话(session)列表，列表中的每个元素为MBS标识。也可以通过是否配置某个或某几个MBS业务的相关参数来隐式指示对应的MBS会话是第一类MBS业务还是第二类MBS业务。例如，如果某个MBS会话对应的配置信息中不包括公共RNTI字段g-RNTI，则认为这个MBS会话是第二类MBS。所述公共RNTI用来加扰对应的MBS会话对应的数据，UE通过检测公共RNTI来接收对应的MBS会话。还可以在MBS会话对应的配置信息中包含一个标识显式的指示对应MBS会话是第一类MBS业务还是第二类MBS业务，或者包含一个标识显示的指示对应的MBS会话是第二类MBS业务，在这种情况下如果一个MBS会话的配置中不包含所述标识，则为第一类MBS业务。
本公开中所述第一类MBS业务和第二类MBS业务都是针对MBS会话来说的。
实施例3
基站支持的第一类MBS业务和第二类MBS业务都在系统信息中指示。具体的，系统信息中包含两个字段，一个字段用于指示基站支持的第一类MBS会话列表，另一个字段用于指示基站支持的第二类MBS业务或会话 列表。所述列表中的每个元素为MBS标识。或者，系统信息中包含一个基站支持的MBS业务或会话列表，对列表中的每个元素，分别指示其是第一类MBS业务还是第二类MBS业务。例如，包含一个标识显式的指示对应MBS业务或会话是第一类MBS业务还是第二类MBS业务，或者包含一个标识显示的指示对应的MBS业务或会话是第二类MBS业务，在这种情况下如果一个MBS业务或会话的配置中不包含所述标识，则为第一类MBS业务。也可以用位图来指示，位图中的位与MBS业务或会话列表中的元素一一对应，位图的不同取值标识MBS业务或会话的类型。例如，如果位图中取值为1，表示对应的MBS业务或会话是第一类MBS业务，取值为0表示对应的MBS业务或会话是第二类MBS业务，反之亦然。
在步骤002，如果所述系统信息和/或MBSConfiguration消息中包含UE感兴趣的MBS业务或会话，且所述MBS业务或会话是第二类MBS业务，则UE与基站建立RRC连接。UE与基站建立RRC连接的具体过程见3GPP TS38.331最新文档。需要说明的是，可以为因需要接收MBS业务而触发的RRC连接建立过程建立定义新的连接建立理由或采用目前3GPP协议中定义的理由“mt-Access”，所述建立RRC连接包括处于RRC IDLE态的UE发起的RRC连接建立过程和处于RRC_INACTIVE态的UE发起的RRC继续(resume)过程。具体的，在建立RRC连接的请求消息RRCConnectionResuest中将对应的EstablishmentCause设置为接收MBS定义的新理由或目前3GPP协议中定义的理由“mt-Access”，或者在继续一个挂起的RRC连接的请求消息RRCConnectionResumeRequest消息中将对应的ResumeCause设置为为接收MBS定义的新理由或目前3GPP协议中定义的理由“mt-Access”。
在步骤003，UE向基站上报(也称指示)其感兴趣(interested)的MBS业务。
具体的，在基站配置其上报感兴趣的MBS业务或会话的情况下，UE可以通过用于指示UE辅助信息的UEAssistanceInformation消息向基站指示 其感兴趣的MBS业务或会话，并在其感兴趣的MBS业务或会话发生变化时重新上报其感兴趣的MBS业务或会话。
也可以定义新的RRC消息用于UE上报其感兴趣的MBS业务或会话。
触发UE上报其感兴趣的MBS业务或会话可以是以下情况之一：UE成功建立RRC连接、UE建立RRC连接以来还未上报过感兴趣的MBS业务或会话、UE兴趣发生变化。
在步骤004，UE接收来自基站的RRC重配置消息。所述重配置消息中包含其感兴趣的MBS会话对应的无线承载的配置信息。
具体的，UE接收来自基站的RRC重配置消息，所述消息中包含MBS业务或会话对应的无线承载的配置信息，所述配置信息中包含该无线承载关联的MBS业务或会话，具体可以为该MBS业务或会话对应的MBS标识。可选的，所述MBS业务或会话是UE在步骤001中获得的第二类MBS业务或会话中的一个。
如本公开所述，通过在系统信息和/或MBSConfiguration消息中指示基站所支持的MBS业务，减少了UE获取基站所支持的MBS业务的时延，节省了UE能耗。
需要说明的是，上述步骤001-004并不是都是必须的，通过适当地组合不同步骤所得到的实施例也包含在本公开的技术范围内。
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 (10)

  1. 一种由用户设备UE执行的方法，包括：
    从基站接收系统信息和/或在多播广播业务-多播控制信道MBS-MCCH上传输的MBSConfiguration消息，在该系统信息和/或MBSConfiguration消息中指示了基站支持的MBS类型；以及
    根据基站支持的MBS类型，进行与接收MBS相应的操作。
  2. 根据权利要求1所述的方法，其中，
    所述MBS类型包括第一类MBS业务和第二类MBS业务，
    所述第一类MBS业务的相关信息在系统信息或MBS-MCCH上传输的消息中广播，
    所述第二类MBS业务的相关信息通过专用无线资源控制RRC信令为UE配置。
  3. 根据权利要求2所述的方法，其中，
    所述第一类MBS业务在MBSConfiguration消息中指示，所述第二类MBS在系统信息中指示；或者
    所述第一类MBS业务和所述第二类MBS业务均在MBSConfiguration消息中指示；或者
    所述第一类MBS业务和所述第二类MBS业务均在系统信息中指示。
  4. 根据权利要求3所述的方法，其中，
    利用如下方式中的至少任一种来指示基站支持的MBS类型：
    通过MBS标识是否包含在系统信息中来指示；
    通过是否配置某个或某几个MBS业务相关参数来隐式指示；
    通过一个标识来显式指示；
    通过位图中的位的取值来指示。
  5. 根据权利要求2所述的方法，其中，
    在所述系统信息和/或MBSConfiguration消息中包含UE感兴趣的MBS业务且该MBS业务是第二类MBS业务的情况下，UE与基站建立RRC连接。
  6. 根据权利要求1至5的任一项所述的方法，其中，
    在下述情况中的任一种情况下，UE向基站上报感兴趣的MBS业务：
    UE成功建立了RRC连接；
    UE在建立RRC连接之后尚未上报感兴趣的MBS业务；
    UE感兴趣的MBS业务发生了变化。
  7. 根据权利要求1至5的任一项所述的方法，其中，
    接收来自基站的RRC重配置消息，该重配置消息中包含UE感兴趣的MBS业务对应的无线承载的配置信息。
  8. 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7中任一项所述的方法。
  9. 一种由基站执行的方法，包括：
    生成系统信息和/或在多播广播业务-多播控制信道MBS-MCCH上传输的MBSConfiguration消息，在该系统信息和/或MBSConfiguration消息中指示了基站支持的MBS类型；以及
    发送所述系统信息和/或MBSConfiguration消息，使用户设备UE根据基站支持的MBS类型来进行与接收MBS相应的操作。
  10. 一种基站，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9所述的方法。
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