WO2022078328A1 - 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 - Google Patents

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 Download PDF

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Publication number
WO2022078328A1
WO2022078328A1 PCT/CN2021/123286 CN2021123286W WO2022078328A1 WO 2022078328 A1 WO2022078328 A1 WO 2022078328A1 CN 2021123286 W CN2021123286 W CN 2021123286W WO 2022078328 A1 WO2022078328 A1 WO 2022078328A1
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mbs
mrb
user equipment
base station
priority
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PCT/CN2021/123286
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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 WO2022078328A1 publication Critical patent/WO2022078328A1/zh

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    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

Definitions

  • the present disclosure relates to the field of wireless communication technologies, and more particularly, to a transmission method performed by a user equipment, a user equipment, a base station, and a transmission method performed by the base station.
  • 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 the RRC_CONNECTED state of RRC_CONNECTED so that these UEs can receive broadcast/multicast services.
  • This disclosure discusses related issues involved in achieving the above-mentioned work objectives.
  • the purpose of the present invention is to provide a transmission method performed by a user equipment, a user equipment, a base station, and a transmission method performed by the base station that solve the following problems: after the base station configures the MRB for a certain MBS service for the UE, the UE Based on which delivery method to receive the MBS service, if the base station is allowed to dynamically switch the delivery method of the MBS service and indicate it to the UE, how the base station instructs and how the UE operates after receiving the corresponding instruction, it is clarified that the MRB or MBS using the PTM delivery method is used. , how to activate the corresponding cell and/or MBS BWP.
  • the transmission method performed by the user equipment of the present invention establishes an RRC connection with the base station through the user equipment, and the base station can change the one or more multicast broadcast MBS services through radio resource control RRC messages or media access control MAC control elements or downlink control information DCI. delivery method.
  • the base station can change the delivery mode of one or more MBS services through the medium access control MAC control element CE, and the MAC control element CE indicates for each MBS service, that is, one MAC
  • the CE only indicates whether the PTM delivery mode of an MRB or MBS service or the MBS service corresponding to the MRB is activated.
  • the user equipment can determine whether the current MRB or the MBS service corresponding to the MRB is using the PTM delivery mode and whether the MAC CE is received. Whether to activate the PTM delivery method.
  • the base station can change the delivery mode of one or more MBS services through the MAC control element, and the medium access control MAC control element CE indicates respectively for each MBS service, that is, one MAC CE only indicates one MRB or Whether the delivery mode of the MBS service or the MBS service corresponding to the MRB is point-to-multipoint PTM, point-to-point PTP, or supports both PTM and PTP.
  • the user equipment receives the medium access control MAC control element CE from the base station, and the MAC CE is used to indicate whether one or more MRBs or MBS services or the PTM delivery mode of the MBS service corresponding to the MRB is used.
  • the MAC CE contains a bitmap, and the MRBs configured with the PTM delivery mode correspond to a bit in the bitmap respectively, and are respectively associated with the bits in the bitmap from right to left or from left to the bitmap in the order of the MRB identifiers. Corresponding to the right.
  • the user equipment when the user equipment receives an RRC message including MRB configuration information corresponding to the MBS service, the cell or carrier configured for the user equipment to transmit the MBS service must be in an active state, or the The RRC message must indicate that the cell or carrier transmitting the MBS service is activated.
  • the identifier of the downlink BWP used by an SCell when it is activated can be configured through the parameter firstActiveDownlinkBWP-Id; if the serving cell is an SpCell, it can be used.
  • the downlink BWP activated when the configuration for the serving cell is performed is indicated by firstActiveDownlinkBWP-Id.
  • the user equipment receives an RRC message from the base station, the RRC message includes a priority indicator, or the MRB configuration information for an MBS service includes a priority indicator, the priority indicator.
  • the function of the level indicator is to define the priority relationship between the MBS service or MRB and the unicast bearer.
  • the priority indicator is used to indicate whether the MBS service or MRB has priority when there is a conflict between receiving the MBS service or the MRB and receiving the unicast bearer.
  • the priority of the MBS or MRB is higher than that of the unicast bearer; if the RRC message or the MRB configuration information for an MBS
  • the MRB configuration information of the MRB includes the priority indicator, and the value of the priority indicator is used to indicate that the priority of the MBS or MRB is higher than that of the unicast bearer.
  • the priority of the MRB is higher than the priority of the unicast bearer; the value of the priority indicator is used to indicate that the priority of the MBS or MRB is lower than the value corresponding to the priority of the unicast bearer, then the UE considers the MBS or MRB The priority is lower than that of the unicast bearer.
  • the user equipment of the present invention includes: a processor; and a memory storing instructions; wherein, when the instructions are executed by the processor, any one of the above-mentioned transmission methods is executed.
  • the base station of the present invention establishes a radio resource control RRC connection with the user equipment, and the base station can change the delivery mode of one or more MBS services through a radio resource control RRC message or a medium access control MAC control element or downlink control information DCI.
  • the transmission method performed by the base station of the present invention establishes a radio resource control RRC connection with the user equipment through the base station, and the base station can change one or more MBS services through a radio resource control RRC message or a medium access control MAC control element or downlink control information DCI. delivery method.
  • the following problem is solved, that is, after the base station configures the MRB for a certain MBS service for the UE, what delivery method is the UE based on? Receiving MBS services, if the base station is allowed to dynamically switch the delivery mode of MBS services and instruct the UE, how the base station will instruct and how the UE will operate after receiving the corresponding instructions, it is clarified how to activate the corresponding MRB or MBS using the PTM delivery mode. Cell and/or MBS BWP.
  • FIG. 1 is a block diagram showing a transmission method performed by a user equipment.
  • FIG. 2 is a block diagram showing a transmission method performed by the user equipment of Embodiment 1.
  • FIG. 2 is a block diagram showing a transmission method performed by the user equipment of Embodiment 1.
  • FIG. 3 is a block diagram showing a transmission method performed by the user equipment of the second embodiment.
  • FIG. 4 is a block diagram showing a transmission method performed by the user equipment of Embodiment 3.
  • FIG. 4 is a block diagram showing a transmission method performed by the user equipment of Embodiment 3.
  • FIG. 5 is a block diagram showing a transmission method performed by the user equipment of Embodiment 4.
  • FIG. 5 is a block diagram showing a transmission method performed by the user equipment of Embodiment 4.
  • FIG. 6 is a block diagram showing switching of MBS transmission modes according to the fifth embodiment.
  • FIG. 7 is a block diagram showing switching of MBS transmission modes according to the sixth embodiment.
  • FIG. 8 is a block diagram showing switching of MBS transmission modes in Embodiment 7.
  • FIG. 8 is a block diagram showing switching of MBS transmission modes in Embodiment 7.
  • FIG. 9 is a block diagram showing a transmission method performed by the user equipment of the tenth embodiment.
  • FIG. 10 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_CONNECTED RRC connected state.
  • RRC_INACTIVE RRC inactive state.
  • RRC_IDLE RRC idle state.
  • RAN Radio Access Network, radio access network.
  • New RAT New Radio Access Technology.
  • MBMS Multimedia Broadcast/Multicast Service, multimedia broadcast and multicast service.
  • MBS Multicast Broadcast Services, multicast broadcast service.
  • MAC Media Access Control, media access control.
  • RB Radio Bearer, wireless bearer.
  • MRB Multicast Broadcast Services Radio Bearer, a wireless bearer of multicast broadcast services, that is, a 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 services.
  • a RAN node delivers an MBS data packet to a set of UEs by 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 for MBS services.
  • the RAN node delivers multiple copies of the MBS data packet to each UE separately by 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.
  • the MBS data packet may include MBS-related control plane information and/or user plane information.
  • the BWP for delivering the MBS service is referred to as the MBS BWP.
  • 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 versions.
  • 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.
  • FIG. 1 is a block diagram showing a transmission method performed by such a user equipment.
  • step 101 is for the UE to establish an RRC connection with the base station
  • step 102 is for the base station to configure the UE for the UE through RRC messages
  • the radio bearers for receiving these MBS services can also be configured for the UE by the base station through the RRC message.
  • the MBS service supports both PTP and PTM delivery methods.
  • the base station configures an MRB for a certain MBS service for the UE, it is a problem to be solved based on which delivery mode the UE receives the MBS service. If the base station is allowed to dynamically switch the delivery mode of the MBS service and instruct the UE, how to instruct the base station and how the UE operates after receiving the corresponding instruction are also issues to be solved. In addition, how to activate the corresponding cell and/or MBS BWP for the MRB or MBS using the PTM delivery method.
  • an MBS service (or called an MBS 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, so The service identifier uniquely identifies an MBS service within a PLMN.
  • FIG. 2 is a block diagram showing a transmission method performed by the user equipment of Embodiment 1.
  • the user equipment UE receives an RRC message from the base station, where the RRC message includes the MRB configuration for a certain MBS (step 201).
  • the RRC message (or the configuration of the MRB for a certain MBS) includes a first indicator, and the first indicator can be used to indicate the MRB or the initial delivery mode of the MBS corresponding to the MRB, or to indicate the
  • the delivery method of the MRB or the corresponding MBS of the MRB or used to indicate the delivery method of the MRB or the corresponding MBS of the MRB during configuration, or used to indicate that the MRB or the corresponding MBS of the MRB is in accordance with this RRC message.
  • the configured delivery method (step 202).
  • the value of the first indication mark may be respectively used to indicate that the delivery mode of the MRB or the MBS corresponding to the MRB is PTM, PTP, and the corresponding value when both PTM and PTP are used at the same time; the value of the first indication mark may also be respectively used for Indicates that the delivery mode of the MRB or the MBS corresponding to the MRB is a value corresponding to PTM and PTP.
  • the first indication mark does not appear, it means that the delivery mode of the MRB or the MBS corresponding to the MRB is simultaneously using PTM and PTP to deliver .
  • the first indication flag indicates that the MRB or the delivery mode of the MBS corresponding to the MRB is PTP.
  • the first indication flag indicates that the MRB or the delivery mode of the MBS corresponding to the MRB is PTM.
  • FIG. 3 is a block diagram showing a transmission method performed by the user equipment of the second embodiment.
  • the user equipment UE receives an RRC message from the base station, where the RRC message includes the MRB configuration for a certain MBS (step 301).
  • the RRC message (or the configuration of the MRB for a certain MBS) includes a second indicator, and the second indicator can be used to indicate whether the MRB or the initial delivery mode of the MBS corresponding to the MRB adopts PTM or is used for Indicates whether the PTM is activated, or is used to indicate whether the PTM delivery method of the MRB or the MBS corresponding to the MRB is activated when the indication flag is received, or used to indicate this MRB or the PTM delivery method of the MBS corresponding to the MRB is configuring this MRB Whether it is activated at the time, or used to indicate whether the PTM delivery mode is activated after the MRB or the MBS corresponding to the MRB is configured according to this RRC message.
  • the value of the second indication flag may be "TRUE” or "FALSE". If the second indicator is configured, it indicates that the PTM delivery mode of the MBS corresponding to the MRB or MRB is activated, and if the second indicator does not appear (that is, not configured), it indicates that the PTM of the MBS corresponding to the MRB or MRB is activated The delivery method is deactivated. Or, if the second indicator is configured, it indicates that the PTM delivery mode of the MRB or the MBS corresponding to the MRB is deactivated, and if the second indicator does not appear, it indicates that the MRB or the PTM delivery mode of the MBS corresponding to the MRB is deactivated is activated (step 302).
  • FIG. 4 is a block diagram showing a transmission method performed by the user equipment of Embodiment 3.
  • the user equipment UE receives an RRC message from the base station, where the RRC message includes the configuration of an MRB for a certain MBS, and the MRB is used for PTM transmission of the MBS (step 401 ).
  • the RRC message (or the configuration of the MRB for a certain MBS) includes a third indicator, and the third indicator can be used to indicate whether the MRB or the MBS corresponding to the MRB is transmitted, or to indicate Whether the initial delivery method of the MRB or the MBS corresponding to the MRB adopts the PTM or is used to indicate whether the PTM delivery method is activated, or whether the PTM delivery method of the MRB or the MBS corresponding to the MRB is activated when the indication flag is received, or It is used to indicate whether the PTM delivery mode of the MRB or the MBS corresponding to the MRB is activated when the MRB is configured, or whether the PTM delivery mode is activated after the MRB or the MBS corresponding to the MRB is configured according to the RRC message, or use It is used to indicate whether the UE uses this MRB to receive the corresponding MBS after receiving the configuration of this MRB.
  • the value of the third indication flag may be "TRUE" or "FALSE". If the third indicator is configured, it indicates that the PTM delivery mode of the MRB or the MBS corresponding to the MRB is activated; if the third indicator does not appear, it indicates that the PTM transmission of the MRB or the MBS corresponding to the MRB is deactivated. Or, if the third indicator is configured, it means that the MRB or the MBS transmission corresponding to the MRB is deactivated, and if the third indicator does not appear, it means that the PTM delivery mode of the MRB or the MBS corresponding to the MRB is activated ( step 402).
  • the third indicator may be included in the configuration information of the MRB that adopts the PTM delivery mode, to indicate whether the UE adopts this MRB to receive the corresponding MBS when receiving the indicator.
  • RRC instructs the lower layer (eg MAC layer) to use the RNTI corresponding to this MBS (or MRB) on the cell (or carrier) and/or bandwidth segment BWP that transmits the corresponding MBS service to receive the DL-SCH or can be used for PTM delivery way to deliver the MBS channel.
  • the lower layer eg MAC layer
  • FIG. 5 is a block diagram showing a transmission method performed by the user equipment of Embodiment 4.
  • the user equipment UE receives an RRC message from the base station, where the RRC message includes MRB configuration information for a certain MBS (step 501).
  • the configuration information of the MRB may include an indicator indicating the cell (or carrier) identifier of the cell (or carrier) that the MBS corresponding to the MRB or the MRB will or is transmitting, or the configuration information of the MRB may include an indicator.
  • the identity indicates a cell (or carrier) identity of a cell (or carrier) used to deliver the MRB or MBS corresponding to the MRB, where the cell or carrier is one of the cells or carriers configured for the UE.
  • the configuration information of the MRB may also include another indicator for indicating the MRB or the BWP identifier of the BWP that the MBS corresponding to the MRB will or is sending, or the configuration information of the MRB may also include another indicator.
  • a BWP identity indicating the BWP used to deliver the MRB or the MBS corresponding to the MRB, the BWP being one of a plurality of BWPs configured for the UE on the cell used to deliver (or will or are delivering) the corresponding MBS (step 502 ) ).
  • the configuration information of the MRB may further include an MBS identifier, which is used to indicate which MBS this MRB is configured to receive.
  • the configuration information of the MRB may further include the RNTI corresponding to the MRB.
  • the following describes an embodiment of switching the MBS transmission mode.
  • An MRB or an MBS service corresponding to an MRB can be delivered by using PTM or PTP or using both PTM and PTP.
  • the base station can change the delivery mode of one (or more) MBS services through RRC signaling or MAC control elements or downlink control information (Downlink Control Information) DCI.
  • the delivery method of the MBS service is the method by which the UE receives the MBS service. In other words, the delivery method of the MBS service determines the RNTI that the UE should use when receiving the MBS service.
  • the transmission method performed by the user equipment of the present invention establishes a radio resource control RRC connection with the base station through the user equipment, and the base station can change one or more multicast broadcasts through a radio resource control RRC message or a medium access control MAC control element or downlink control information DCI.
  • the delivery method of MBS service is not limited to MBS services.
  • FIG. 6 is a block diagram showing switching of MBS transmission modes according to the fifth embodiment.
  • the base station can change the delivery mode of one (or more) MBS services through the MAC control element (step 601).
  • the medium access control MAC control element CE is indicated separately for each MBS. In other words, one MAC CE only indicates whether the PTM delivery mode of one MRB or MBS or the MBS corresponding to the MRB is activated.
  • the MAC CE contains the MRB identifier or the MBS identifier.
  • the MAC CE may explicitly indicate the MRB identifier that the MAC CE functions or the MBS identifier corresponding to the MRB.
  • the MAC CE may also include an indication bit (or a bit) to indicate whether the MRB or the PTM delivery mode of the MBS corresponding to the MRB is activated. It can be determined whether to activate the PTM delivery method.
  • the UE may also determine whether to activate the PTM delivery method according to whether the current MRB or the MBS corresponding to the MRB is using the PTM delivery method and whether the MAC CE is received (step 602). For example, if the PTM delivery mode of the MRB or the MBS corresponding to the MRB is in the active state, the PTM delivery mode is deactivated when the MAC CE is received; To this MAC CE, the PTM delivery method is activated.
  • FIG. 7 is a block diagram showing switching of MBS transmission modes according to the sixth embodiment.
  • the base station may change the delivery mode of one (or more) MBS services through the MAC control element (step 701).
  • the medium access control MAC control element CE indicates separately for each MBS, in other words, one MAC CE only indicates one MRB or MBS or whether the delivery mode of the MBS corresponding to the MRB is PTM, PTP or supports both PTM and PTP (step 702).
  • the MAC CE contains the MRB identifier or the MBS identifier.
  • the MAC CE may explicitly indicate the MRB identifier that the MAC CE functions or the MBS identifier corresponding to the MRB.
  • the MAC CE may also include an indication flag, which is used to indicate the MRB or the delivery mode of the MBS corresponding to the MRB.
  • an indication flag which is used to indicate the MRB or the delivery mode of the MBS corresponding to the MRB.
  • two bits are used to indicate the MRB or the MBS delivery mode corresponding to the MRB, and different values of the two bits correspond to different MAB delivery modes respectively.
  • PTM and PTP can also use a bit to indicate whether they are activated. For example, "01" indicates PTP, "10" indicates PTM, and "11" indicates that both PTM and PTP are supported.
  • FIG. 8 is a block diagram showing switching of MBS transmission modes in Embodiment 7.
  • the UE receives the medium access control MAC control element CE from the base station (step 801), and the MAC CE is used to indicate whether the PTM delivery mode of one or more MRBs or MBSs or the MBS corresponding to the MRBs is activated.
  • the MAC CE contains a bitmap, and the MRBs configured with the PTM delivery mode correspond to a bit in the bitmap respectively. left to right) respectively.
  • a bit in the bitmap takes a value of 1 to indicate that the PTM delivery mode corresponding to the MRB is activated, and a value of 0 indicates that the PTM delivery mode is deactivated, and vice versa (step 802 ). It should be noted that, if the MRBs are only configured for PTM delivery, each MRB corresponds to one bit in the bitmap.
  • the corresponding cell or carrier and/or BWP that is, the cell or carrier and/or BWP that transmits this MBS
  • the corresponding RNTI receives the DL-SCH; if the current MRB or the PTM delivery mode of the MBS corresponding to the MRB is deactivated, on the corresponding cell or carrier and/or BWP (that is, the cell or carrier and/or BWP that transmits this MBS) Stop receiving the DL-SCH with the corresponding RNTI.
  • the RRC layer after receiving the RRC message for activating the MRB or the PTM delivery mode of the MBS corresponding to the MRB, instructs the MAC to
  • the DL-SCH is received on the cell or carrier and/or BWP (that is, the cell or carrier and/or BWP that transmits this MBS) with the corresponding RNTI; the RRC layer receives the PTM transmission of the MBS corresponding to the deactivated MRB or MRB
  • the MAC is instructed to stop receiving the DL-SCH with the corresponding RNTI on the corresponding cell or carrier and/or BWP (ie, the cell or carrier and/or BWP that transmits this MBS).
  • the MAC CE used to deactivate the PTM delivery mode of the MBS can be restricted to use only the PTM delivery mode.
  • this MAC CE is scrambled with the RNTI configured for this MBS on the cell or carrier and/or BWP corresponding to the PTM delivery mode for this MRB or MBS corresponding to the MRB.
  • the following describes an embodiment in which the UE activates the cell/carrier receiving the MBS and the BWP
  • the UE When the UE receives an RRC message containing the MRB configuration information corresponding to the MBS, the cell or carrier configured for the UE to transmit the MBS must be in an active state, or the RRC message must indicate the cell or carrier to transmit the MBS Activated.
  • the UE activates the PSCell before/when it needs to receive the MBS, or the PSCell cannot be deactivated.
  • the secondary cell group SCG is for the UE configured with dual connectivity, it is a subset of serving cells, including PSCell and 0 or more secondary cells; in dual connectivity, when performing a synchronous reconfiguration process (Reconfiguration with Sync procedure), the SCG cell used for the UE to perform random access is the PSCell.
  • the identifier of the downlink BWP used by an SCell when it is activated can be configured through the parameter firstActiveDownlinkBWP-Id; if the serving cell is an SpCell, the firstActiveDownlinkBWP-Id can indicate the execution The downlink BWP activated during the configuration of the serving cell.
  • MBS is always sent or delivered on the BWP indicated by the firstActiveDownlinkBWP-Id of a cell or carrier configured for the UE.
  • the MBS can only be configured on the SCell with PUCCH.
  • the UE when a UE working on a BWP that is not used for sending MBS needs to receive MBS services on the MBS BWP, the UE automatically switches to the MBS BWP. Or, when the timer onDurationTimerMBS configured for one MBS is started, the UEs working on other BWPs switch to this MBS BWP to receive MBS services.
  • the base station or the network can be configured to receive the MBS service in the DRX mode of discontinuous reception.
  • the timer onDurationTimerMBS is the duration configured by the network or the base station for the UE to receive the MBS service. During the running of the timer onDurationTimerMBS, the UE always tries to receive the corresponding MBS service.
  • the RRC message for configuring MBS or MRB sent by the base station to the UE contains an indication, indicating whether the BWP configured with the MBS or MRB is in an active state or is activated when receiving the indication.
  • the indicator does not appear, the corresponding MBS BWP is in an activated state or a deactivated state.
  • bwp-InactivityTimer is used to control the UE to fall back to the default BWP after the time determined by the timer (bwp-InactivityTimer determines the duration after which the UE falls back to the default BWP).
  • the default BWP is configured by the base station for each cell through an RRC message.
  • condition (1) or condition (2) if the BWP in the active state is not an MBS BWP and satisfies condition (1) or condition (2), then further judge whether the conditions A-D are met at least One, if at least one of the conditions A-D is satisfied, start or restart the bwp-InactivityTimer timer associated with this activated downlink BWP.
  • Condition A If the PDCCH for C-RNTI or configuration scheduling RNTI (ie CS-RNTI) is received on the activated BWP and contains downlink assignment or uplink grant (if PDCCH addressed to C-RNTI or CS-RNTI indicating downlink assignment or uplink grant is received on the activate BWP);
  • Condition B If the PDCCH for the C-RNTI or CS-RNTI received for the activated BWP contains a downlink assignment or an uplink grant (if PDCCH addressed to C-RNTI or CS-RNTI indicating downlink assignment or uplink grant is received for the activate BWP);
  • Condition C If a MAC Protocol Data Unit (Protocal Data Unit) PDU is sent on the Configure Uplink Grant and no Listen Before Talk LBT Failure Indication from the lower layer is received (if a MAC PDU is transmitted in a configured uplink grant and LBT failure indication is not received from lower layer);
  • a MAC Protocol Data Unit Protocal Data Unit
  • Condition D If a MAC PDU is received on a configured downlink assignment (if a MAC PDU is received in a configured downlink assignment).
  • FIG. 9 is a block diagram showing a transmission method performed by the user equipment of the tenth embodiment.
  • the UE receives an RRC message from the base station, and the RRC message includes a priority indicator, or the MRB configuration information for one MBS includes a priority indicator (step 901), and the function of the priority indicator It is to define the priority relationship between the MBS or MRB and the unicast bearer.
  • the priority indicator is used to indicate whether the MBS or MRB has a higher priority when a conflict occurs between receiving the MBS or MRB and receiving the unicast bearer.
  • the RRC message or the MRB configuration information for one MBS includes the priority indicator, the priority of the MBS or the MRB is higher than the priority of the unicast bearer.
  • the UE considers that the priority of the MBS or MRB is higher than the priority of the unicast bearer; the value of the priority indicator is used to indicate that the priority of the MBS or MRB is lower than that of the unicast bearer , the UE considers that the priority of the MBS or MRB is lower than the priority of the unicast bearer (step 902).
  • the UE When a non-MBS UE is receiving MBS or MRB and a unicast bearer conflicts, if the corresponding priority indicator indicates that the priority of receiving MBS or MRB is higher than that of unicast bearer, the UE switches to receiving MBS or MRB. MRB's BWP. Optionally, the UE further performs the following operation: using the RNTI corresponding to the MBS (or MRB) on the BWP that transmits the corresponding MBS to receive the DL-SCH or a channel that can be used to transmit the PTM.
  • FIG. 10 is a schematic structural block diagram of the user equipment UE involved in the present invention.
  • the user equipment UE1000 includes a processor 1001 and a memory 1002 .
  • the processor 1001 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like.
  • the memory 1002 may include, for example, volatile memory (such as random access memory RAM), a hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory, and the like.
  • Program instructions are stored on the memory 1002 . When the instruction is executed by the processor 1001, the above method described in detail in the present invention and executed by the user equipment can be executed.
  • the present invention relates to a base station that establishes a radio resource control RRC connection with a user equipment, the base station can change one or more multicasts through a radio resource control RRC message or a medium access control MAC control element or downlink control information DCI The delivery method of broadcast MBS service.
  • the present invention relates to a transmission method performed by a base station, which establishes a radio resource control RRC connection with a user equipment through the base station, and the base station can change one or more through a radio resource control RRC message or a medium access control MAC control element or downlink control information DCI.
  • the delivery method of multiple multicast broadcast MBS services is not limited to a base station, which establishes a radio resource control RRC connection with a user equipment through the base station, and the base station can change one or more through a radio resource control RRC message or a medium access control MAC control element or downlink control information DCI.
  • 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” 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 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

本发明提供一种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，其中用户设备执行的传输方法中，通过用户设备与基站建立RRC连接，基站能通过无线资源控制RRC消息或媒体访问控制MAC控制元素或下行控制信息DCI改变一个或多个MBS业务的递送方式。

Description

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 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执行的传输方法、用户设备、基站以及基站执行的传输方法。
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
本发明的目的在于，提供一种解决了以下问题的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，即在基站为UE配置了用于某个MBS业务的MRB后，UE基于何种递送方式接收MBS业务、如果允许基站动态切换MBS业务的递送方式并指示给UE，基站如何进行指示以及UE在收到对应的指示后如何操作，明确了采用PTM递送方式的MRB或MBS，如何激活对应的小区和/或MBS BWP。
本发明的用户设备执行的传输方法，通过用户设备与基站建立RRC连接，基站能通过无线资源控制RRC消息或媒体访问控制MAC控制元素或 下行控制信息DCI改变一个或多个多播广播MBS业务的递送方式。
上述的用户设备执行的传输方法中，所述基站能通过媒体访问控制MAC控制元素CE改变一个或多个MBS业务的递送方式，所述MAC控制元素CE针对每个MBS业务分别指示，即一个MAC CE仅指示一个MRB或MBS业务或MRB对应的MBS业务的PTM递送方式是否被激活，用户设备能根据当前MRB或者MRB对应的MBS业务是否正在使用PTM递送方式以及是否接收到所述MAC CE来确定是否激活PTM递送方式。
上述用户设备执行的传输方法中，基站能通过MAC控制元素改变一个或多个MBS业务的递送方式，媒体访问控制MAC控制元素CE针对每个MBS业务分别指示，即一个MAC CE仅指示一个MRB或MBS业务或MRB对应的MBS业务的递送方式是点到多点PTM、点到点PTP还是同时支持PTM和PTP。
上述用户设备执行的传输方法中，用户设备接收来自基站的媒体访问控制MAC控制元素CE，所述MAC CE用于指示一个或多个MRB或MBS业务或MRB对应的MBS业务的PTM递送方式是否被激活，所述MAC CE中包含一个位图，配置了PTM递送方式的MRB分别对应位图中的一个比特，按照MRB标识从小到大的顺序分别与位图中的比特从右到左或从左到右分别对应。
上述用户设备执行的传输方法中，在用户设备接收到一个包含MBS业务对应的MRB配置信息的RRC消息时，为用户设备配置的传输所述MBS业务的小区或载波必须处于激活态，或者所述RRC消息中必须指示传输所述MBS业务的小区或载波被激活。
上述用户设备执行的传输方法中，在网络或基站为用户设备配置一个服务小区时，能通过参数firstActiveDownlinkBWP-Id配置一个SCell在被激活时使用的下行BWP的标识；如果这个服务小区是SpCell，能通过firstActiveDownlinkBWP-Id指示执行这个针对所述服务小区的配置时激活的下行BWP。
上述用户设备执行的传输方法中，用户设备接收来自基站的RRC消息，所述RRC消息中包含一个优先级指示标识，或者针对一个MBS业务的MRB配置信息中包含一个优先级指示标识，所述优先级指示标识的作用在 于定义MBS业务或MRB与单播承载的优先级关系，所述优先级指示标识用于指示当接收MBS业务或MRB与接收单播承载发生冲突时，MBS业务或MRB是否优先级更高，如果所述RRC消息或针对一个MBS的MRB配置信息中包含所述优先级指示标识则MBS或MRB的优先级高于单播承载的优先级；如果所述RRC消息或针对一个MBS的MRB配置信息中包含所述优先级指示标识，且所述优先级指示标识的取值为用于指示MBS或MRB的优先级高于单播承载的优先级对应的值，则UE认为MBS或MRB的优先级高于单播承载的优先级；所述优先级指示标识的取值为用于指示MBS或MRB的优先级低于单播承载的优先级对应的值，则UE认为MBS或MRB的优先级低于单播承载的优先级。
本发明的用户设备，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任一项所述的传输方法。
本发明的基站，该基站与用户设备建立无线资源控制RRC连接，所述基站能通过无线资源控制RRC消息或媒体访问控制MAC控制元素或下行控制信息DCI改变一个或多个MBS业务的递送方式。
本发明的基站执行的传输方法，通过基站与用户设备建立无线资源控制RRC连接，所述基站能通过无线资源控制RRC消息或媒体访问控制MAC控制元素或下行控制信息DCI改变一个或多个MBS业务的递送方式。
发明效果
通过本发明的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，解决了以下问题，即在基站为UE配置了用于某个MBS业务的MRB后，UE基于何种递送方式接收MBS业务、如果允许基站动态切换MBS业务的递送方式并指示给UE，基站如何进行指示以及UE在收到对应的指示后如何操作，明确了采用PTM递送方式的MRB或MBS，如何激活对应的小区和/或MBS BWP。
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为表示用户设备执行的传输方法的框图。
图2为表示实施例1的用户设备所执行的传输方法的框图。
图3为表示实施例2的用户设备所执行的传输方法的框图。
图4为表示实施例3的用户设备所执行的传输方法的框图。
图5为表示实施例4的用户设备所执行的传输方法的框图。
图6为表示实施例5的切换MBS传输模式的框图。
图7为表示实施例6的切换MBS传输模式的框图。
图8为表示实施例7的切换MBS传输模式的框图。
图9为表示实施例10的用户设备所执行的传输方法的框图。
图10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。当实施例应用于新无线访问技术(NR-New RAT)或长期演进(LTE-Long Term Evolution)系统时，术语的含义与为该系统制定的相关协议中定义的含义相同。其中具体的术语的含义如下。
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。
MAC：Media Access Control，媒体访问控制。
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。
本公开中，所述MBS数据包可以包括MBS相关的控制面信息和/或用户面信息。
本公开中，将用于递送MBS业务的BWP称为MBS BWP。
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。
在RAN2#110e次会议上达成MBS业务支持PTP和PTM两种递送方式。但是，在基站为UE配置一个用于某个MBS业务的MRB后，UE基于何种递送方式接收该MBS业务是需要解决的问题。如果允许基站动态切换MBS业务的递送方式并指示给UE，基站如何进行指示以及UE在收到对应的指示后如何操作也是需要解决的问题。此外，采用PTM递送方式的MRB或MBS，如何激活对应的小区和/或MBS BWP。
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。
以下，结合附图来详细描述本发明的若干实施例。
以下描述MBS无线承载MRB的配置过程实施例。
实施例1
图2为表示实施例1的用户设备所执行的传输方法的框图。用户设备UE接收来自基站的RRC消息，所述RRC消息中包含针对某个MBS的MRB的配置(步骤201)。所述RRC消息(或所述针对某个MBS的MRB的配置)中包含第一指示标识，所述第一指示标识可以用于指示MRB或MRB对应 的MBS的初始递送方式，或者用于指示在接收到这个指示标识时MRB或MRB对应的MBS的递送方式，或者用于指示这个MRB或MRB对应的MBS在配置时的递送方式，或者用于指示这个MRB或者MRB对应的MBS在根据这个RRC消息配置后的递送方式(步骤202)。第一指示标识的取值可以是分别用于指示MRB或MRB对应的MBS的递送方式为PTM、PTP、同时采用PTM和PTP时对应的值；第一指示标识的取值也可以是分别用于指示MRB或MRB对应的MBS的递送方式为PTM、PTP对应的值，可选的，如果所述第一指示标识不出现，则表示MRB或MRB对应的MBS的递送方式为同时采用PTM和PTP递送。或者，如果所述第一指示标识不出现，则表示MRB或MRB对应的MBS的递送方式为PTP。或者，如果所述第一指示标识不出现，则表示MRB或MRB对应的MBS的递送方式为PTM。
实施例2
图3为表示实施例2的用户设备所执行的传输方法的框图。用户设备UE接收来自基站的RRC消息，所述RRC消息中包含针对某个MBS的MRB的配置(步骤301)。所述RRC消息(或所述针对某个MBS的MRB的配置)中包含第二指示标识，所述第二指示标识可以用于指示MRB或MRB对应的MBS的初始递送方式是否采用PTM或者用于指示PTM是否被激活，或者用于指示在接收到这个指示标识时MRB或MRB对应的MBS的PTM递送方式是否被激活，或者用于指示这个MRB或MRB对应的MBS的PTM递送方式在配置这个MRB时是否被激活，或者用于指示这个MRB或者MRB对应的MBS在根据这个RRC消息配置后PTM递送方式是否被激活。第二指示标识的取值可以是“TRUE”或“FALSE”。如果配置了所述第二指示标识，则表示MRB或MRB对应的MBS的PTM递送方式被激活，如果所述第二指示标识不出现(即没有配置)，则表示MRB或MRB对应的MBS的PTM递送方式被去激活。或者，如果配置了所述第二指示标识，则表示MRB或MRB对应的MBS的PTM递送方式被去激活，如果所述第二指示标识不出现，则表示MRB或MRB对应的MBS的PTM递送方式被激活(步骤302)。
实施例3
图4为表示实施例3的用户设备所执行的传输方法的框图。用户设备UE接收来自基站的RRC消息，所述RRC消息中包含针对某个MBS的MRB的配置，所述MRB用于MBS的PTM传输(步骤401)。所述RRC消息(或所述针对某个MBS的MRB的配置)中包含第三指示标识，所述第三指示标识可以用于指示这个的MRB或MRB对应的MBS传输是否开始，或用于指示MRB或MRB对应的MBS的初始递送方式是否采用PTM或者用于指示PTM递送方式是否被激活，或者用于指示在接收到这个指示标识时MRB或MRB对应的MBS的PTM递送方式是否被激活，或者用于指示这个MRB或MRB对应的MBS的PTM递送方式在配置这个MRB时是否被激活，或者用于指示这个MRB或者MRB对应的MBS在根据这个RRC消息配置后PTM递送方式是否被激活，或者用于指示UE在接收到这个MRB的配置之后是否采用这个MRB接收对应的MBS。第三指示标识的取值可以是“TRUE”或“FALSE”。如果配置了所述第三指示标识，则表示MRB或MRB对应的MBS的PTM递送方式被激活，如果所述第三指示标识不出现，则表示MRB或MRB对应的MBS的PTM传输被去激活。或者，如果配置了所述第三指示标识，则表示MRB或MRB对应的MBS传输被去激活，如果所述第三指示标识不出现，则表示MRB或MRB对应的MBS的PTM递送方式被激活(步骤402)。第三指示标识可以包含在采用PTM递送方式的MRB的配置信息中，以指示UE在接收到这个指示标识时是否采用这个MRB来接收对应的MBS。
根据实施例1-3，如果PTM被激活或MRB被配置为采用PTM递送方式或MRB对应的MBS被配置为采用PTM递送方式或RRC消息中包含所述第一指示标识或第二指示标识或第三指示标识，RRC指示下层(例如MAC层)在传输对应MBS业务的小区(或载波)和/或带宽片段BWP上采用这个MBS(或MRB)对应的RNTI接收DL-SCH或可用于采用PTM递送方式递送MBS的信道。
需要说明的是，本公开中假设采用PTM递送方式的MBS业务在DL-SCH上传输，但是采用PTM递送方式的MBS业务在新定义可用于PTM递送方式的信道上传输也包含本公开的技术范围内。
实施例4
图5为表示实施例4的用户设备所执行的传输方法的框图。用户设备UE接收来自基站的RRC消息，所述RRC消息中包含针对某个MBS的MRB的配置信息(步骤501)。所述MRB的配置信息中可以包含一个指示标识指示所述MRB或MRB对应的MBS将要或正在发送的小区(或载波)的小区(或载波)标识，或者所述MRB的配置信息中包含一个指示标识指示用于递送所述MRB或MRB对应的MBS的小区(或载波)的小区(或载波)标识，所述小区或载波是为UE配置的小区或载波中的一个。所述MRB的配置信息中也可以包含另一个指示标识用于指示所述MRB或MRB对应的MBS将要或正在发送的BWP的BWP标识，或者所述MRB的配置信息中也可以包含另一个指示标识指示用于递送所述MRB或MRB对应的MBS的BWP的BWP标识，所述BWP是用于递送(或将要或正在递送)对应MBS的小区上为UE配置的多个BWP中的一个(步骤502)。所述MRB的配置信息中还可以包含MBS标识，用于指示这个MRB是配置用于接收哪个MBS。此外，所述MRB的配置信息中还可以包含这个MRB对应的RNTI。
以下描述切换MBS传输模式实施例。
一个MRB或MRB对应的MBS业务可以采用PTM或PTP或者同时采用PTM和PTP递送。基站可以通过RRC信令或MAC控制元素或下行控制信息(Downlink Control Information)DCI改变一个(或多个)MBS业务的递送方式。从UE的角度来说，MBS业务的递送方式就是UE接收该MBS业务的方式，换言之，MBS业务的递送方式决定了UE在接收该MBS业务时应该采用的RNTI。本发明的用户设备执行的传输方法，通过用户设备与基站建立无线资源控制RRC连接，基站能通过无线资源控制RRC消息或媒体访问控制MAC控制元素或下行控制信息DCI改变一个或多个多播广播MBS业务的递送方式。
实施例5
图6为表示实施例5的切换MBS传输模式的框图。其中，基站可以通过MAC控制元素改变一个(或多个)MBS业务的递送方式(步骤601)。 媒体访问控制MAC控制元素CE针对每个MBS分别指示。换言之，一个MAC CE仅指示一个MRB或MBS或MRB对应的MBS的PTM递送方式是否被激活。MAC CE中包含MRB标识或MBS标识。所述MAC CE中可以显式指示所述MAC CE作用的MRB标识或者MRB对应的MBS标识。所述MAC CE还可以包含一个指示位(或一个比特)，用于指示MRB或者MRB对应的MBS的PTM递送方式是否被激活，UE在接收到所述MAC CE时，根据指示位的取值就可以确定是否激活PTM递送方式。UE也可以根据当前MRB或者MRB对应的MBS是否正在使用PTM递送方式以及是否接收到所述MAC CE来确定是否激活PTM递送方式(步骤602)。例如，如果MRB或者MRB对应的MBS的PTM递送方式处于激活态，在接收到这个MAC CE时去激活PTM递送方式；反之，如果MRB或者MRB对应的MBS的PTM递送方式处于去激活态，如果接收到这个MAC CE则激活PTM递送方式。
实施例6
图7为表示实施例6的切换MBS传输模式的框图。其中，基站可以通过MAC控制元素改变一个(或多个)MBS业务的递送方式(步骤701)。媒体访问控制MAC控制元素CE针对每个MBS分别指示，换言之一个MAC CE仅指示一个MRB或MBS或MRB对应的MBS的递送方式是PTM、PTP还是同时支持PTM和PTP(步骤702)。此时，MAC CE中包含MRB标识或MBS标识。所述MAC CE中可以显式指示所述MAC CE作用的MRB标识或者MRB对应的MBS标识。所述MAC CE还可以包含一个指示标识，用于指示MRB或者MRB对应的MBS的递送方式。例如，在MAC CE用用两个比特指示MRB或者MRB对应的MBS的递送方式，这两个比特的不同取值分别对应不同的MAB递送方式。PTM和PTP也可以分别用一个比特指示是否被激活，例如“01”表示PTP、“10”表示PTM、“11”表示同时支持PTM和PTP。
实施例7
图8为表示实施例7的切换MBS传输模式的框图。其中，UE接收来自基站的媒体访问控制MAC控制元素CE(步骤801)，所述MAC CE用于指示一个或多个MRB或MBS或MRB对应的MBS的PTM递送方式是否 被激活。所述MAC CE中包含一个位图，配置了PTM递送方式的MRB分别对应位图中的一个比特，例如，按照MRB标识从小到大的顺序分别与位图中的比特从右到左(或从左到右)分别对应。位图中的比特取值为1表示对应MRB的PTM递送方式被激活，取值为0表示PTM递送方式被去激活，反之亦然(步骤802)。需要说明的是，如果MRB仅配置用于PTM递送，那么每个MRB分别对应位图中的一个比特。
上述实施例5-7中，如果当前MRB或者MRB对应的MBS的PTM递送方式被激活，则在对应的小区或载波和/或BWP(即传输这个MBS的小区或载波和/或BWP)上用对应的RNTI接收DL-SCH；如果当前MRB或者MRB对应的MBS的PTM递送方式被去激活，则在对应的小区或载波和/或BWP(即传输这个MBS的小区或载波和/或BWP)上停止用对应的RNTI接收DL-SCH。
此外，如果采用RRC信令激活或去激活MRB或者MRB对应的MBS的PTM递送方式，那么RRC层在接收到所述激活MRB或者MRB对应的MBS的PTM递送方式的RRC消息后，指示MAC在对应的小区或载波和/或BWP(即传输这个MBS的小区或载波和/或BWP)上用对应的RNTI接收DL-SCH；RRC层在接收到所述去激活MRB或者MRB对应的MBS的PTM传输的RRC消息后，指示MAC在对应的小区或载波和/或BWP(即传输这个MBS的小区或载波和/或BWP)上停止用对应的RNTI接收DL-SCH。
需要说明的是，如果MAC控制元素CE是针对每个MRB或MRB对应的MBS分别指示，则可以限制用于去激活该MBS的PTM递送方式的MAC CE仅用PTM递送方式。换言之，这个MAC CE在用于这个MRB或MRB对应的MBS的PTM递送方式对应的小区或载波和/或BWP上用为这个这个MBS配置的RNTI加扰。
以下描述UE激活接收MBS的小区/载波和BWP的实施例
实施例8
在UE接收到一个包含MBS对应的MRB配置信息的RRC消息时，为UE配置的传输所述MBS的小区或载波必须处于激活态，或者所述RRC消息中必须指示传输所述MBS的小区或载波被激活。
在双连接中，如果MBS或MBS对应的MRB被配置在SCG的主SCG小区(Primary SCG Cell)PSCell，那么UE在需要接收这个MBS前/时激活这个PSCell，或者这个PSCell不能被去激活。其中，辅小区组SCG是针对配置了双连接的UE而言，它是服务小区的子集，包含PSCell和0个或多个辅小区；在双连接中，当执行同步重配置过程(Reconfiguration with Sync procedure)时用于UE执行随机接入的SCG小区就是PSCell。
实施例9
在网络或基站为UE配置一个服务小区时，可以通过参数firstActiveDownlinkBWP-Id配置一个SCell在被激活时使用的下行BWP的标识；如果这个服务小区是SpCell，可以通过firstActiveDownlinkBWP-Id指示执行这个针对所述服务小区的配置时激活的下行BWP。
可以规定MBS总是在为UE配置的一个小区或载波的firstActiveDownlinkBWP-Id指示的BWP上发送或递送。
可以规定MBS只能配置在具有PUCCH的SCell上。
可以规定当一个工作在不是用于发送MBS的BWP上的UE需要到MBS BWP上接收MBS业务时，UE自动切换到MBS BWP。或者，当启动为一个MBS配置的定时器onDurationTimerMBS时，工作在其他BWP上的UE切换到这个MBS BWP上接收MBS业务。为了节省UE能耗，基站或网络可以配置采用非连续接收DRX方式接收MBS业务。其中，定时器onDurationTimerMBS是网络或基站为UE配置的接收MBS业务的持续时间，在定时器onDurationTimerMBS运行期间，UE总是尝试接收对应的MBS业务。
可以规定，由基站发送给UE的用于配置MBS或MRB的RRC消息中包含一个指示标识，指示配置了所述MBS或MRB的BWP在接收到这个指示标识时是否处于激活态或是否被激活。可选的，如果所述指示标识不出现，则对应的MBS BWP处于激活态或去激活态。
可以规定，UE不为MBS BWP启动定时器bwp-InactivityTimer。bwp-InactivityTimer用于控制UE在经历所述定时器确定的时间后回退到缺省BWP(bwp-InactivityTimer deteremines the duration after which the UE falls back to the default BWP)。其中，缺省BWP是基站通过RRC消息为每个小区配置的。具体的，对每个配置了bwp-InactivityTimer且处于激活态的服务小区，如果处于激活态的BWP不是MBS BWP，并且满足条件(1)或者条件(2)，则，进一步判断是否满足条件A-D至少一项，如果满足条件A-D至少一项，则启动或重启关联到这个激活的下行BWP的bwp-InactivityTimer定时器。
其中，
条件(1)：如果配置了缺省BWP且激活的BWP不是缺省BWP且激活的BWP也不是休眠BWP(适用于配置了休眠BWP的情况)；
条件(2)如果没有配置缺省BWP，激活的BWP不是初始BWP也不是休眠BWP；
条件A：如果在所述激活的BWP上接收到针对C-RNTI或配置调度RNTI(即CS-RNTI)的PDCCH包含下行分配或上行许可(if PDCCH addressed to C-RNTI or CS-RNTI indicating downlink assignment or uplink grant is received on the activate BWP)；
条件B：如果为所述激活的BWP接收到针对C-RNTI或CS-RNTI的PDCCH包含下行分配或上行许可(if PDCCH addressed to C-RNTI or CS-RNTI indicating downlink assignment or uplink grant is received for the activate BWP)；
条件C：如果在配置上行许可上发送一个MAC协议数据单元(Protocal Data Unit)PDU且没有收到来自下层的先听再说(Listen Before Talk)LBT失效指示(if a MAC PDU is transmitted in a configured uplink grant and LBT failure indication is not received from lower layer)；
条件D：如果在配置下行分配上接收到一个MAC PDU(if a MAC PDU is received in a configured downlink assignment)。
需要说明的，本实施例涉及术语的含义见TS38.331、TS38.321最新文档。
实施例10
图9为表示实施例10的用户设备所执行的传输方法的框图。其中，UE接收来自基站的RRC消息，所述RRC消息中包含一个优先级指示标识，或者针对一个MBS的MRB配置信息中包含一个优先级指示标识(步骤901)，所述优先级指示标识的作用在于定义MBS或MRB与单播承载的优先级关系，例如，所述优先级指示标识用于指示当接收MBS或MRB与接收单播承载发生冲突时，MBS或MRB是否优先级更高。可选的，如果所述RRC消息或针对一个MBS的MRB配置信息中包含所述优先级指示标识，则MBS或MRB的优先级高于单播承载的优先级。可选的，如果所述RRC消息或针对一个MBS的MRB配置信息中包含所述优先级指示标识，且所述优先级指示标识的取值为用于指示MBS或MRB的优先级高于单播承载的优先级对应的值，则UE认为MBS或MRB的优先级高于单播承载的优先级；所述优先级指示标识的取值为用于指示MBS或MRB的优先级低于单播承载的优先级对应的值，则UE认为MBS或MRB的优先级低于单播承载的优先级(步骤902)。
当工作在非MBS的UE发生接收MBS或MRB和单播承载冲突时，如果对应的优先级指示标识指示接收MBS或MRB的优先级高于单播承载的优先级，则UE切换到接收MBS或MRB的BWP。可选的，UE还执行以下操作：在传输对应MBS的BWP上采用这个MBS(或MRB)对应的RNTI接收DL-SCH或可用于传输PTM的信道。
图10是本发明涉及的用户设备UE的简要结构框图。如图10所示，该用户设备UE1000包括处理器1001和存储器1002。处理器1001例如可以包括微处理器、微控制器、嵌入式处理器等。存储器1002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1002上存储有程序指令。该指令在由处理器1001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。
另外，本发明涉及一种基站，该基站与用户设备建立无线资源控制RRC连接，所述基站能通过无线资源控制RRC消息或媒体访问控制MAC控制元素或下行控制信息DCI改变一个或多个多播广播MBS业务的递送方式。
此外，本发明涉及一种基站执行的传输方法，通过基站与用户设备建立无线资源控制RRC连接，所述基站能通过无线资源控制RRC消息或媒体访问控制MAC控制元素或下行控制信息DCI改变一个或多个多播广播MBS业务的递送方式。
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. 一种用户设备执行的传输方法，通过用户设备与基站建立无线资源控制RRC连接，基站能通过无线资源控制RRC消息或媒体访问控制MAC控制元素或下行控制信息DCI改变一个或多个多播广播MBS业务的递送方式。
  2. 根据权利要求1所述的用户设备执行的传输方法，其中，
    所述基站能通过媒体访问控制MAC控制元素CE改变一个或多个MBS业务的递送方式，所述MAC控制元素CE针对每个MBS业务分别指示，即一个MAC CE仅指示一个MRB或MBS业务或MRB对应的MBS业务的PTM递送方式是否被激活，
    用户设备能根据当前MRB或者MRB对应的MBS业务是否正在使用PTM递送方式以及是否接收到所述MAC CE来确定是否激活PTM递送方式。
  3. 根据权利要求1所述的用户设备执行的传输方法，其中，
    基站能通过MAC控制元素改变一个或多个MBS业务的递送方式，媒体访问控制MAC控制元素CE针对每个MBS业务分别指示，即一个MAC CE仅指示一个MRB或MBS业务或MRB对应的MBS业务的递送方式是点到多点PTM、点到点PTP还是同时支持PTM和PTP。
  4. 根据权利要求1所述的用户设备执行的传输方法，其中，
    用户设备接收来自基站的媒体访问控制MAC控制元素CE，所述MAC CE用于指示一个或多个MRB或MBS业务或MRB对应的MBS业务的PTM递送方式是否被激活，
    所述MAC CE中包含一个位图，配置了PTM递送方式的MRB分别对应位图中的一个比特，按照MRB标识从小到大的顺序分别与位图中的比特从右到左或从左到右分别对应。
  5. 根据权利要求1～4中任一项所述的用户设备执行的传输方法，其中，
    在用户设备接收到一个包含MBS业务对应的MRB配置信息的RRC消息时，为用户设备配置的传输所述MBS业务的小区或载波必须处于激活态，或者所述RRC消息中必须指示传输所述MBS业务的小区或载波被激活。
  6. 根据权利要求1～4中任一项所述的用户设备执行的传输方法，其中，
    在网络或基站为用户设备配置一个服务小区时，能通过参数firstActiveDownlinkBWP-Id配置一个SCell在被激活时使用的下行BWP的标识；如果这个服务小区是SpCell，能通过firstActiveDownlinkBWP-Id指示执行这个针对所述服务小区的配置时激活的下行BWP。
  7. 根据权利要求1所述的用户设备执行的传输方法，其中，
    用户设备接收来自基站的RRC消息，所述RRC消息中包含一个优先级指示标识，或者针对一个MBS业务的MRB配置信息中包含一个优先级指示标识，所述优先级指示标识的作用在于定义MBS业务或MRB与单播承载的优先级关系，所述优先级指示标识用于指示当接收MBS业务或MRB与接收单播承载发生冲突时，MBS业务或MRB是否优先级更高，
    如果所述RRC消息或针对一个MBS的MRB配置信息中包含所述优先级指示标识则MBS或MRB的优先级高于单播承载的优先级；如果所述RRC消息或针对一个MBS的MRB配置信息中包含所述优先级指示标识，且所述优先级指示标识的取值为用于指示MBS或MRB的优先级高于单播承载的优先级对应的值，则用户设备认为MBS或MRB的优先级高于单播承载的优先级；所述优先级指示标识的取值为用于指示MBS或MRB的优先级低于单播承载的优先级对应的值，则用户设备认为MBS或MRB的优先级低于单播承载的优先级。
  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. 一种基站，该基站与用户设备建立无线资源控制RRC连接，所述基站能通过无线资源控制RRC消息或媒体访问控制MAC控制元素或下行控制信息DCI改变一个或多个多播广播MBS业务的递送方式。
  10. 一种基站执行的传输方法，通过基站与用户设备建立无线资源控制RRC连接，所述基站能通过无线资源控制RRC消息或媒体访问控制MAC控制元素或下行控制信息DCI改变一个或多个多播广播MBS业务的 递送方式。
PCT/CN2021/123286 2020-10-15 2021-10-12 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)

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