WO2022078384A1 - Procédé de transmission exécuté par un équipement utilisateur, équipement utilisateur, station de base et procédé de transmission exécuté par une station de base - Google Patents

Procédé de transmission exécuté par un équipement utilisateur, équipement utilisateur, station de base et procédé de transmission exécuté par une station de base Download PDF

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Publication number
WO2022078384A1
WO2022078384A1 PCT/CN2021/123527 CN2021123527W WO2022078384A1 WO 2022078384 A1 WO2022078384 A1 WO 2022078384A1 CN 2021123527 W CN2021123527 W CN 2021123527W WO 2022078384 A1 WO2022078384 A1 WO 2022078384A1
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WIPO (PCT)
Prior art keywords
mrb
mbs
user equipment
base station
ptm
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PCT/CN2021/123527
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English (en)
Chinese (zh)
Inventor
肖芳英
刘仁茂
常宁娟
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夏普株式会社
肖芳英
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Publication of WO2022078384A1 publication Critical patent/WO2022078384A1/fr

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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 a radio resource control RRC connection with the base station through the user equipment, the base station configures the multicast broadcast MBS service for the user equipment through the RRC message, and the radio bearer for receiving these MBS services is set by the base station through the RRC message.
  • User device configuration When the user equipment of the present invention establishes a radio resource control RRC connection with the base station through the user equipment, the base station configures the multicast broadcast MBS service for the user equipment through the RRC message, and the radio bearer for receiving these MBS services is set by the base station through the RRC message.
  • the user equipment may also receive an RRC message from the base station, the RRC message includes the configuration of the MRB radio bearer of the multicast broadcast service for a certain MBS service, and the RRC message includes the first.
  • An indicator where the first indicator is used to indicate the initial delivery mode of the MRB or the MBS service corresponding to the MRB, or used to indicate the delivery mode of the MRB or the MBS service corresponding to the MRB when the indicator is received, or used for Indicates the delivery mode of the MRB or the MBS service corresponding to the MRB during configuration, or is used to indicate the delivery mode of the MRB or the MBS service corresponding to the MRB after configuration according to the RRC message.
  • the value of the first indication flag can also be respectively used to indicate that the MRB or the MBS service corresponding to the MRB is delivered in a way of point-to-multipoint PTM, point-to-point PTP, and simultaneously.
  • the user equipment may also receive an RRC message from the base station, the RRC message includes the configuration of the MRB radio bearer of the multicast broadcast service for a certain MBS service, and the RRC message includes the first.
  • Two indication flags can be used to indicate whether the MRB or the initial delivery mode of the MBS service corresponding to the MRB adopts the PTM or whether the PTM is activated, or is used to indicate that the MRB or Whether the PTM delivery mode of the MBS service corresponding to the MRB is activated, or whether the PTM delivery mode used to indicate this MRB or the MBS service corresponding to the MRB is activated when configuring the MRB, or used to indicate this MRB or the MBS service corresponding to the MRB Whether the PTM delivery mode is activated after configuration according to this RRC message.
  • the user equipment may also receive an RRC message from the base station, where the RRC message includes the configuration of the radio bearer MRB for a multicast broadcast service for a certain MBS service, and the MRB is used for the MBS service point-to-multipoint PTM transmission, the RRC message contains a third indicator, and the third indicator can be used to indicate whether the MRB or the MBS service transmission corresponding to the MRB starts, or to indicate the MRB or the corresponding MRB.
  • the initial delivery method of the MBS service adopts 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 service corresponding to the MRB is activated when the indication flag is received, or used to indicate whether the PTM delivery method is activated.
  • the PTM delivery mode of the MRB or the MBS service corresponding to the MRB is activated when the MRB is configured, or used to indicate whether the PTM delivery mode of the MRB or the MBS service corresponding to the MRB is activated after the configuration according to the RRC message, or used for Indicates whether the user equipment uses this MRB to receive the corresponding MBS service after receiving the configuration of this MRB.
  • the user equipment receives an RRC message from the base station, and the RRC message includes configuration information of a multicast broadcast service radio bearer MRB for a certain MBS service, and the configuration information of the MRB includes: It can contain an indicator indicating the cell identity of the cell to which the MRB or the MBS service corresponding to the MRB will be or is being sent or the carrier identity of the carrier, or the configuration information of the MRB contains an indicator indicating that the MRB is used to deliver the MRB or The cell identifier of the cell of the MBS service corresponding to the MRB or the carrier identifier of the carrier, where the cell or carrier is one of the cells or carriers configured for the user equipment.
  • the configuration information of the MRB may also include another indicator that is used to indicate the MRB or the BWP identifier of the bandwidth segment BWP that the MBS service corresponding to the MRB will or is sending, or the BWP identifier.
  • the configuration information of the MRB can include another BWP identifier indicating the BWP used to deliver the MBS service corresponding to the MRB or the MRB, where the BWP is used to deliver or will or is delivering the corresponding MBS service.
  • 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 establishes a radio resource control RRC connection with the user equipment, configures multicast broadcast MBS services for the user equipment through RRC messages, and configures the radio bearer for the user equipment to receive these MBS services through the RRC message.
  • 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, configures the multicast broadcast MBS service for the user equipment through the RRC message, and configures the base station through the RRC message for the user equipment to receive these MBS services. wireless bearer.
  • 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 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.
  • 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 starts transmission, 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, configures multicast broadcast MBS services for the user equipment through RRC messages, and configures the base station to receive these MBS services for the user equipment through the RRC message. wireless bearer.
  • the present invention also 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, configures a multicast broadcast MBS service for the user equipment through an RRC message, and configures the user equipment through the RRC message by the base station.
  • the radio bearers that receive these MBS services.
  • 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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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention porte sur un procédé de transmission exécuté par un équipement utilisateur, sur un équipement utilisateur, sur une station de base et sur un procédé de transmission exécuté par une station de base. Le procédé associé comprend les étapes suivantes : un équipement utilisateur établit une connexion de commande de ressource radio (RRC) avec une station de base ; et la station de base configure des services MBS pour l'équipement utilisateur au moyen d'un message de commande RRC, une porteuse radio pour recevoir les services MBS étant configurée pour l'équipement utilisateur par la station de base au moyen du message de commande RRC.
PCT/CN2021/123527 2020-10-15 2021-10-13 Procédé de transmission exécuté par un équipement utilisateur, équipement utilisateur, station de base et procédé de transmission exécuté par une station de base WO2022078384A1 (fr)

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