CN114374934A

CN114374934A - Transmission method executed by user equipment, base station and transmission method executed by base station

Info

Publication number: CN114374934A
Application number: CN202011106724.6A
Authority: CN
Inventors: 肖芳英; 刘仁茂; 常宁娟
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2022-04-19
Also published as: WO2022078384A1

Abstract

The invention provides a transmission method executed by user equipment, the user equipment, a base station and a transmission method executed by the base station, wherein the transmission method executed by the user equipment establishes Radio Resource Control (RRC) connection with the base station through the user equipment, the base station configures Multicast and Broadcast (MBS) services for the user equipment through RRC messages, and radio bearers for receiving the MBS services are configured for the user equipment through the RRC messages by the base station.

Description

Transmission method executed by user equipment, base station and transmission method executed by base station

Technical Field

The present disclosure relates to the field of wireless communication technologies, and in particular, to a transmission method performed by a user equipment, a base station, and a transmission method performed by a base station.

Background

In 12 months 2019, the work Project of NR Multicast and Broadcast Service (NR MBS) (see non-patent document: RP-193248: New WID: NR Multicast and Broadcast Service) was proposed and approved at the third Generation Partnership Project (3rd Generation Partnership Project: 3GPP) RAN # 86-time congress. One of the working objectives (referred to as Objective a in SA 2) of the corresponding research project (see SP-190726) in SA2 is to support MBS services including public safety, V2X applications, IPTV, group communication, internet of things applications, etc. in a 5G system (5 GS). 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-mentioned goals of SA 2. In particular, one of the operational goals defined in RP-193248 is to define a group scheduling mechanism for UEs in the radio resource control CONNECTED state RRC _ CONNECTED so that these UEs can receive broadcast/multicast traffic.

The present disclosure discusses related problems involved in achieving the above-mentioned operational goals.

Disclosure of Invention

The present invention provides a transmission method executed by a UE, a base station and a transmission method executed by a base station, which solve the following problems, that is, after the base station configures MRBs for a certain MBS service for the UE, the UE receives the MBS service based on what delivery method, if the base station is allowed to dynamically switch the delivery method of the MBS service and indicate to the UE, how the base station indicates and how the UE operates after receiving the corresponding indication, and it is clear how the MRBs or MBS using a PTM delivery method activates the corresponding cell and/or MBS BWP.

The transmission method executed by the user equipment of the invention establishes radio resource control RRC connection with the base station through the user equipment, the base station configures multicast and broadcast MBS service for the user equipment through RRC message, and the base station configures the user equipment through the RRC message for receiving the radio bearer of the MBS service.

In the transmission method executed by the user equipment, the user equipment may also receive an RRC message from the base station, where the RRC message includes a configuration of a multicast broadcast service radio bearer MRB for a certain MBS service, and the RRC message includes a first indication identifier, where the first indication identifier is used to indicate an initial delivery mode of the MBS service corresponding to the MRB or MRB, or is used to indicate a delivery mode of the MBS service corresponding to the MRB or MRB when the indication identifier is received, or is used to indicate a delivery mode of the MBS service corresponding to the MRB or MRB when configured, or is used to indicate a delivery mode of the MBS service corresponding to the MRB or MRB after configured according to the RRC message.

In the transmission method executed by the user equipment, the value of the first indication identifier may be a value corresponding to a point-to-multipoint PTM and a point-to-point PTP respectively indicating the delivery mode of the MBS service corresponding to the MRB or the MRB, and a value corresponding to a PTM and a PTP simultaneously, or a value corresponding to a PTM and a PTP respectively indicating the delivery mode of the MBS service corresponding to the MRB or the MRB.

In the transmission method executed by the user equipment, the user equipment may also receive an RRC message from the base station, where the RRC message includes a configuration of a multicast broadcast service radio bearer MRB for a certain MBS service, and the RRC message includes a second indication identifier, where the second indication identifier may be used to indicate whether an initial delivery mode of the MBS service corresponding to the MRB or the MRB employs a PTM or indicate whether the PTM is activated, or indicate whether a PTM delivery mode of the MBS service corresponding to the MRB or the MRB is activated when receiving the indication identifier, or indicate whether the PTM delivery mode of the MBS service corresponding to the MRB or the MRB is activated when configuring the MRB, or indicate whether the PTM delivery mode of the MBS service corresponding to the MRB or the MRB is activated after configuring the MRB according to the RRC message.

In the transmission method executed by the above user equipment, the user equipment may also receive an RRC message from the base station, where the RRC message includes a configuration of a multicast broadcast service radio bearer MRB for a certain MBS service, the MRB is used for point-to-multipoint PTM transmission of the MBS service, the RRC message includes a third indication identifier, and the third indication identifier may be used to indicate whether transmission of the MBS service corresponding to the MRB or MRB is started, or to indicate whether an initial delivery manner of the MBS service corresponding to the MRB or MRB adopts PTM or indicate whether a PTM delivery manner is activated, or to indicate whether a PTM delivery manner of the MBS service corresponding to the MRB or MRB is activated when receiving the indication identifier, or to indicate whether a PTM delivery manner of the MBS service corresponding to the MRB or MRB is activated when configuring the MRB, or to indicate whether the PTM delivery manner of the MBS service corresponding to the MRB or MRB is activated after configuring according to the RRC message, or to indicate whether the user equipment receives the corresponding MBS service using the MRB after receiving the configuration of the MRB.

In the transmission method executed by the user equipment, the user equipment receives an RRC message from a base station, where the RRC message includes configuration information of a radio bearer MRB for a multicast broadcast service of a certain MBS service, and the configuration information of the MRB may include a cell identifier or a carrier identifier of a cell where an indication identifier indicates that the MBS service corresponding to the MRB or the MRB is to be or is being sent, or the configuration information of the MRB includes a cell identifier or a carrier identifier of a cell where an indication identifier indicates that the MBS service corresponding to the MRB or the MRB is to be or is being sent, and the cell or the carrier is one of cells or carriers configured for the user equipment.

In the transmission method executed by the user equipment, the MRB configuration information may further include another BWP identifier indicating a BWP to be used for indicating the MBS service corresponding to the MRB or being sent, or the MRB configuration information may further include another BWP identifier indicating a BWP to be used for delivering the MBS service corresponding to the MRB or the MRB, where the BWP is one of a plurality of BWPs configured for the UE on a cell to be used for delivering or being used for delivering the corresponding MBS service.

The user equipment of the present invention includes: a processor; and a memory storing instructions; wherein the instructions, when executed by the processor, perform any of the above transmission methods.

In the base station, the base station establishes Radio Resource Control (RRC) connection with the user equipment, configures Multicast and Broadcast (MBS) services for the user equipment through RRC messages, and configures radio bearers for receiving the MBS services for the user equipment through the RRC messages.

The transmission method executed by the base station of the invention establishes radio resource control RRC connection with the user equipment through the base station, configures multicast and broadcast MBS service for the user equipment through RRC message, and configures and receives the radio bearer of the MBS service for the user equipment through the RRC message by the base station.

Effects of the invention

The invention solves the following problems that after a base station configures MRB for a certain MBS service for UE, the UE receives the MBS service based on which delivery mode, if the base station is allowed to dynamically switch the delivery mode of the MBS service and indicate to the UE, the base station indicates and the UE operates after receiving the corresponding indication, and makes clear how to activate the corresponding cell and/or MBS BWP by adopting MRB or MBS in PTM delivery mode.

Drawings

The above and other features of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:

fig. 1 is a block diagram illustrating 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. 3 is a block diagram showing a transmission method performed by the user equipment of embodiment 2.

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. 6 is a block diagram showing switching of MBS transmission modes of embodiment 5.

Fig. 7 is a block diagram showing switching of MBS transmission modes of embodiment 6.

Fig. 8 is a block diagram showing switching of MBS transmission modes of embodiment 7.

Fig. 9 is a block diagram showing a transmission method performed by the user equipment of embodiment 10.

Fig. 10 is a block diagram schematically showing the structure of a user equipment UE according to the present invention.

Detailed Description

The present disclosure is described in detail below with reference to the attached drawings and detailed description. It should be noted that the present disclosure should not be limited to the specific embodiments described below. In addition, for the sake of brevity, detailed descriptions of well-known technologies not directly related to the present disclosure are omitted to prevent confusion of understanding of the present disclosure.

Some terms related to the present disclosure are described below, and specific meanings of the terms are described in 3GPP latest relevant documents, such as TS38.300, TS38.331, TS36.300, TS36.331, and the like. When the embodiments are applied to a New radio access technology (NR-New RAT) or a Long Term Evolution (LTE-Long Term Evolution) system, the terms have the same meanings as defined in a relevant protocol established for the system. Wherein the meaning of the specific terms is as follows.

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.

NR: new RAT, New radio access technology.

MBMS: multimedia Broadcast/Multicast Service, Multimedia Broadcast Multicast Service.

MBS: multicast Broadcast Services.

MAC: media Access Control, Media Access Control.

RB: radio Bearer, Radio Bearer.

MRB: multicast Broadcast Services Radio Bearer, that is, Bearer defined for MBS transmission.

BWP: bandwidth Part, Bandwidth fragment or partial Bandwidth.

MCCH: multicast Control Channel, Multicast Control Channel. The MBS-MCCH is used for transmitting control information related to receiving the MBS service.

SC-MCCH: single Cell Multicast Control Channel, Single Cell Multicast Control Channel.

TMGI: temporal Mobile Group Identity, Temporary Mobile Group Identity.

PLMN: public Land Mobile Network, Public Land Mobile Network.

RNTI: radio Network Temporary Identifier.

And PTM: point to Multipoint, a delivery (sender) mode of MBS service. In the PTM delivery mode, the RAN node delivers a copy of MBS data packets to a group of ues (a RAN node receivers a single copy of MBS data packets over radio to a sets of ues) by radio.

PTP: point to Point, a delivery method of MBS service. In the PTP delivery mode, the RAN node delivers copies of a plurality of MBS data packets to each ue by radio (a RAN node delivery copies of MBS data packet over radio to individual ues).

SC-PTM: 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.

In this disclosure, the MBS data packet may include MBS-related control plane information and/or user plane information.

In this disclosure, BWP for delivering MBS services is referred to as MBS BWP.

In the present disclosure, the network, the base station, and the RAN may be used interchangeably, and the network may be a long term evolution LTE network, an NR network, an enhanced long term evolution LTE network, or other networks defined in subsequent evolution releases of 3 GPP.

In LTE SC-PTM, a base station broadcasts a Multimedia Broadcast Multicast Service (MBMS) service supported by the base station and scheduling information thereof through system information and information transmitted on an SC-MCCH channel, and radio bearer configuration information for transmitting 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. When UE needs to receive a certain MBMS service, a radio bearer is established according to predefined parameters and data is received. In this case, the UE can receive the MBMS service without establishing an RRC connection.

In NR MBS, a part of MBS services (service) may also be scheduled in a similar manner as SC-PTM, so that UEs in RRC idle state and RRC inactive state may also receive the MBS services. However, there is another part of MBS service that requires the UE to establish RRC connection with the base station, and then the base station configures the UE through dedicated RRC signaling (also called dedicated RRC message), and the radio bearer receiving these MBS services can also be configured for the UE by the base station through dedicated RRC signaling. Fig. 1 is a block diagram illustrating a transmission method performed by such a user equipment. Step 101 establishes RRC connection between the UE and the base station, step 102 configures the UE for the base station through RRC message, and the base station may also configure the UE for radio bearers receiving the MBS services through RRC message.

And the MBS service is achieved to support two delivery modes of PTP and PTM on RAN2#110e conference. However, after the base station configures an MRB for a certain MBS service for the UE, the problem that needs to be solved is based on which delivery method the UE receives the MBS service. If the base station is allowed to dynamically switch the delivery mode of the MBS service and indicate to the UE, how the base station indicates and how the UE operates after receiving the corresponding indication are also problems to be solved. In addition, how to activate the corresponding cell and/or MBS BWP by MRB or MBS using PTM delivery.

It should be noted that an MBS service (or referred to as an MBS session) may be identified by an MBS id, which may be a TMGI and/or a session id sessionId, where the TMGI may include a PLMN id and/or a service id, and the service id uniquely identifies an MBS service in a PLMN.

Hereinafter, several embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The following describes an embodiment of a configuration process of an MBS radio bearer MRB.

Example 1

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 configuration of the MRB for a certain MBS (step 201). The RRC message (or the configuration of the MRB for a certain MBS) includes a first indication identifier, where the first indication identifier may be used to indicate an initial delivery mode of the MBS corresponding to the MRB or the MRB, or to indicate a delivery mode of the MBS corresponding to the MRB or the MRB when receiving the indication identifier, or to indicate a delivery mode of the MBS corresponding to the MRB or the MRB when configuring, or to indicate a delivery mode of the MBS corresponding to the MRB or the MRB after configuring according to the RRC message (step 202). The value of the first indication identifier may be a value corresponding to a PTM and a PTP respectively used for indicating that the MRB or the MBS corresponding to the MRB is delivered, and the PTM and the PTP are simultaneously used; optionally, if the first indicator does not appear, it indicates that the delivery mode of the MBS corresponding to the MRB or the MRB is to simultaneously use PTM and PTP for delivery. Or, if the first indication identifier does not appear, it indicates that the delivery mode of the MRB or the MBS corresponding to the MRB is PTP. Or, if the first indication identifier does not appear, the delivery mode of the MRB or the MBS corresponding to the MRB is PTM.

Example 2

Fig. 3 is a block diagram showing a transmission method performed by the user equipment of embodiment 2. The user equipment UE receives an RRC message from the base station, where the RRC message includes the configuration of the MRB for a certain MBS (step 301). The RRC message (or the configuration of the MRB for a certain MBS) includes a second indication identifier, where the second indication identifier may be used to indicate whether the initial delivery mode of the MBS corresponding to the MRB or the MRB employs a PTM or indicate whether the PTM is activated, or indicate whether the PTM delivery mode of the MBS corresponding to the MRB or the MRB is activated when receiving the indication identifier, or indicate whether the PTM delivery mode of the MBS corresponding to the MRB or the MRB is activated when configuring the MRB, or indicate whether the PTM delivery mode of the MBS corresponding to the MRB or the MRB is activated after configuring the PTM according to the RRC message. The value of the second indication flag may be "TRUE" or "FALSE". If the second indication identification is configured, the PTM delivery mode of the MBS corresponding to the MRB or the MRB is activated, and if the second indication identification does not appear (i.e. is not configured), the PTM delivery mode of the MBS corresponding to the MRB or the MRB is deactivated. Or, if the second indication identifier is configured, the PTM delivery method of the MBS corresponding to the MRB or the MRB is deactivated, and if the second indication identifier does not appear, the PTM delivery method of the MBS corresponding to the MRB or the MRB is activated (step 302).

Example 3

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 a base station, wherein the RRC message comprises the configuration of MRBs of a certain MBS, and the MRBs are 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 indication identifier, where the third indication identifier may be used to indicate whether MBS transmission corresponding to this MRB or MRB starts, or indicate whether an initial delivery manner of the MBS corresponding to the MRB or MRB uses PTM or indicates whether the PTM delivery manner is activated, or indicate whether the PTM delivery manner of the MBS corresponding to the MRB or MRB is activated when receiving this indication identifier, or indicate whether the PTM delivery manner of the MBS corresponding to this MRB or MRB is activated when configuring this MRB, or indicate whether the PTM delivery manner of this MBS corresponding to the MRB or MRB is activated after configuring according to this RRC message, or indicate whether the UE receives the corresponding MBS using this MRB after receiving the configuration of this MRB. The value of the third indicator may be "TRUE" or "FALSE". If the third indication mark is configured, the PTM delivery mode of the MBS corresponding to the MRB or the MRB is activated, and if the third indication mark does not appear, the PTM transmission of the MBS corresponding to the MRB or the MRB is deactivated. Or, if the third indication identifier is configured, it indicates that the MBS transmission corresponding to the MRB or the MRB is deactivated, and if the third indication identifier does not appear, it indicates that the PTM delivery mode of the MBS corresponding to the MRB or the MRB is activated (step 402). The third indicator may be included in the configuration information of the MRB using the PTM delivery method to indicate whether the UE receives the corresponding MBS using this MRB when receiving this indicator.

According to embodiments 1-3, if PTM is activated or MRB is configured to employ PTM delivery or MBS corresponding to MRB is configured to employ PTM delivery or said first indicator, second indicator or third indicator is included in RRC message, RRC indicates that lower layer (e.g. MAC layer) receives DL-SCH or channel available for delivering MBS using PTM delivery using RNTI corresponding to this MBS (or MRB) on cell (or carrier) and/or bandwidth segment BWP transmitting corresponding MBS service.

It should be noted that, in the present disclosure, it is assumed that the MBS service using the PTM delivery method is transmitted on the DL-SCH, but it is also within the technical scope of the present disclosure that the MBS service using the PTM delivery method is transmitted on a channel newly defined for the PTM delivery method.

Example 4

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 a base station, where the RRC message includes configuration information of an MRB for a certain MBS (step 501). The configuration information of the MRB may include a cell (or carrier) identifier indicating a cell (or carrier) to which the MBS or the MBS corresponding to the MRB is to be or is being sent, or the configuration information of the MRB includes a cell (or carrier) identifier indicating a cell (or carrier) used for delivering the MBS or the MBS corresponding to the MRB or the MRB, where the cell or carrier is one of cells or carriers configured for the UE. The MRB configuration information may also include another indication identifier for indicating the BWP id of the MBS to be sent or being sent by the MRB or the MRB, or the MRB configuration information may also include another indication identifier for indicating the BWP id of the MBS to be delivered (or to be sent or being sent) by the MRB or the MRB, where the BWP is one of the BWPs configured for the UE on the cell to which the MBS is to be delivered (or to be sent or being sent) (step 502). The configuration information of the MRB may further include an MBS id for indicating which MBS is configured for receiving by the MRB. In addition, the MRB configuration information may further include an RNTI corresponding to the MRB.

The following describes embodiments of switching MBS transmission modes.

One MRB or the corresponding MBS service of the MRB can adopt PTM or PTP or adopt PTM and PTP to deliver. The base station may change the delivery mode of one (or more) MBS services through RRC signaling or MAC Control element or Downlink Control Information (DCI). From the perspective of the UE, the delivery mode of the MBS service is the mode in which the UE receives the MBS service, in other words, the delivery mode of the MBS service determines the RNTI that the UE should adopt when receiving the MBS service. The transmission method executed by the user equipment of the invention establishes the radio resource control RRC connection with the base station through the user equipment, and the base station can change the delivery mode of one or more multicast broadcast MBS services through the radio resource control RRC message or the media access control MAC control element or the downlink control information DCI.

Example 5

Fig. 6 is a block diagram showing switching of MBS transmission modes of embodiment 5. Wherein, 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 indicates separately for each MBS. In other words, one MAC CE indicates only whether a PTM delivery mode of one MRB or MBS corresponding to the MRB is activated. The MAC CE comprises MRB identification or MBS identification. The MRB identifier acted by the MAC CE or the MBS identifier corresponding to the MRB may be explicitly indicated in the MAC CE. The MAC CE may further include an indication bit (or a bit) for indicating whether the PTM delivery method of the MBS corresponding to the MRB or the MRB is activated, and when receiving the MAC CE, the UE may determine whether to activate the PTM delivery method according to a value of the indication bit. 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 method of the MBS corresponding to the MRB or the MRB is in an active state, the PTM delivery method is deactivated when the MAC CE is received; otherwise, if the PTM delivery mode of the MBS corresponding to the MRB or the MRB is in a deactivated state, the PTM delivery mode is activated if the MAC CE is received.

Example 6

Fig. 7 is a block diagram showing switching of MBS transmission modes of embodiment 6. Wherein, the base station can change the delivery mode of one (or more) MBS services through the MAC control element (step 701). The media access control MAC control element CE indicates separately for each MBS, in other words, one MAC CE only indicates whether the delivery mode of one MRB or MBS corresponding to the MRB is PTM, PTP or both PTM and PTP are supported (step 702). At this time, the MAC CE includes MRB identifier or MBS identifier. The MRB identifier acted by the MAC CE or the MBS identifier corresponding to the MRB may be explicitly indicated in the MAC CE. The MAC CE may further include an indication identifier for indicating the delivery mode of the MRB or the MBS corresponding to the MRB. For example, in the MAC CE, two bits are used to indicate the delivery mode of the MRB or the MBS corresponding to the MRB, and different values of the two bits respectively correspond to different MAB delivery modes. PTM and PTP may also be indicated by a bit to indicate whether or not to be activated, for example, PTP is indicated by "01", "PTM is indicated by" 10 ", and PTM and PTP are simultaneously supported by" 11 ", respectively.

Example 7

Fig. 8 is a block diagram showing switching of MBS transmission modes of embodiment 7. Wherein, the UE receives a medium access control MAC control element CE from the base station (step 801), the MAC CE is used to indicate whether PTM delivery mode of one or more MRBs or MBS corresponding to the MRBs is activated. The MAC CE includes a bitmap, and MRBs configured with a PTM delivery mode respectively correspond to one bit in the bitmap, for example, the bits in the bitmap respectively correspond to each other from right to left (or from left to right) according to the order from small to large of MRB identifiers. A bit value of 1 in the bitmap indicates that the PTM delivery method corresponding to the MRB is activated, and a value of 0 indicates that the PTM delivery method is deactivated, or vice versa (step 802). It should be noted that if the MRBs are configured for PTM delivery only, each MRB corresponds to one bit in the bitmap.

In the above embodiments 5-7, if the PTM delivery mode of the current MRB or the MBS corresponding to the MRB is activated, the DL-SCH is received on the corresponding cell or carrier and/or BWP (i.e. the cell or carrier and/or BWP transmitting this MBS) with the corresponding RNTI; if the current MRB or the PTM delivery mode of the MBS corresponding to the MRB is deactivated, stopping receiving the DL-SCH by using the corresponding RNTI on the corresponding cell or carrier and/or BWP (namely the cell or carrier and/or BWP transmitting the MBS).

In addition, if the PTM delivery mode of the MBS corresponding to the MRB or the MRB is activated or deactivated by using RRC signaling, after receiving an RRC message that activates the PTM delivery mode of the MBS corresponding to the MRB or the MRB, the RRC layer instructs the MAC to receive the DL-SCH with the corresponding RNTI in the corresponding cell or carrier and/or BWP (i.e., the cell or carrier and/or BWP transmitting the MBS); after receiving the RRC message for deactivating the MRB or activating the PTM transmission of the MBS corresponding to the MRB, the RRC layer instructs the MAC to stop receiving the DL-SCH with the corresponding RNTI in the corresponding cell or carrier and/or BWP (i.e., the cell or carrier and/or BWP transmitting the MBS).

It should be noted that if the MAC control element CE is separately indicated for each MRB or MBS corresponding to the MRB, the MAC CE for deactivating the PTM delivery method of the MBS may be restricted to use only the PTM delivery method. In other words, the MAC CE is scrambled with the RNTI configured for the MBS on the cell or carrier and/or BWP corresponding to the PTM delivery method used for the MBS or the MBS corresponding to the MRB.

The following describes embodiments of UE activating reception of MBS's cell/carrier and BWP

Example 8

When UE receives an RRC message containing MRB configuration information corresponding to MBS, the cell or carrier for transmitting MBS configured for UE must be in activated state, or the cell or carrier for transmitting MBS must be indicated to be activated in the RRC message.

In dual connectivity, if an MBS or an MRB corresponding to the MBS is configured in a Primary SCG Cell (Primary SCG Cell) PSCell of an SCG, the UE activates the PSCell before/when the MBS needs to be received, or the PSCell cannot be deactivated. Wherein, the secondary cell group SCG is a subset of serving cells for the UE configured with dual connectivity, and includes PSCell and 0 or more secondary cells; in dual connectivity, the SCG cell for the UE to perform random access when performing a synchronization Reconfiguration procedure (Reconfiguration with Sync procedure) is the PSCell.

Example 9

When a network or a base station configures a serving cell for UE, configuring the identifier of downlink BWP used by an SCell when the SCell is activated through a parameter firstActiveDownlinBWP-Id; if the serving cell is a SpCell, the downlink BWP activated at the time of configuration for the serving cell may be indicated by a firstActiveDownlinkBWP-Id.

It may be specified that the MBS is always transmitted or delivered on BWP indicated by the firstActiveDownlinkBWP-Id of one cell or carrier configured for the UE.

It may be specified that MBS can only be configured on SCell with PUCCH.

It may be specified that when a UE operating on a BWP that is not used for transmitting MBS needs to receive MBS services onto the MBS BWP, the UE automatically switches to the MBS BWP. Or, when starting the timer ondurationtimerMBS configured for one MBS, the UE working on other BWP switches to the MBS BWP to receive the MBS service. In order to save the energy consumption of the UE, the base station or the network can be configured to receive the MBS service by adopting a discontinuous reception DRX mode. The timer ondurationtimerfmbs is a duration for receiving the MBS service configured for the UE by the network or the base station, and during the operation of the timer ondurationtimerfmbs, the UE always attempts to receive the corresponding MBS service.

It may be provided that the RRC message sent by the base station to the UE for configuring the MBS or MRB includes an indication flag indicating whether the BWP configuring the MBS or MRB is in an active state or activated when receiving the indication flag. Optionally, if the indication flag does not appear, the corresponding MBS BWP is in an activated state or a deactivated state.

It may be provided that the UE does not start the timer BWP-inactivity timer for the MBS BWP. BWP-InactivatyTimer is used to control the UE to fall back to the default BWP after the time determined by the timer has elapsed (BWP-inactivyTimer definitions after the duration of the UE failure back to the failure BWP). Wherein the default BWP is configured for each cell by the base station through RRC messages. Specifically, for each serving cell configured with BWP-inactivity timer and in an active state, if the active state BWP is not an MBS BWP and satisfies the condition (1) or the condition (2), it is further determined whether at least one of the conditions a-D is satisfied, and if at least one of the conditions a-D is satisfied, the BWP-inactivity timer associated with this active downlink BWP is started or restarted.

Wherein the content of the first and second substances,

condition (1): if the default BWP is configured and the active BWP is not the default BWP and the active BWP is not the dormant BWP (applicable to the case where the dormant BWP is configured);

conditional (2) if the default BWP is not configured, the active BWP is neither the initial BWP nor the dormant BWP;

condition a: if a PDCCH aiming at the C-RNTI or the configuration scheduling RNTI (namely CS-RNTI) is received on the activated BWP and comprises downlink allocation or uplink permission (ifPDCCH addressed to the C-RNTI or CS-RNTI indicating downlink assignment or uplink grant is received on the activated BWP);

condition B: if the activated BWP receives a PDCCH containing downlink allocation or uplink permission (if PDCCH addressed to C-RNTI or CS-RNTI indicating downlink permission or uplink permission for the activated BWP) aiming at the C-RNTI or CS-RNTI;

condition C: if a MAC protocol Data Unit (protocol Data Unit) PDU is sent on the configuration uplink permission and a Listen Before Talk (Listen Before Talk) LBT failure indication (if a MAC PDU is transmitted in a configured uplink grant and an LBT failure indication is not received from a lower layer is not received;

condition D: if a MAC PDU (if a MAC PDU is received in a configured downlink assignment) is received on the configured downlink assignment.

It should be noted that the meaning of the terms related to this embodiment is shown in the latest documents TS38.331 and TS 38.321.

Example 10

Fig. 9 is a block diagram showing a transmission method performed by the user equipment of embodiment 10. Wherein, the UE receives an RRC message from the base station, where the RRC message includes a priority indication identifier, or the MRB configuration information for an MBS includes a priority indication identifier (step 901), where the priority indication identifier is used to define a priority relationship between the MBS or the MRB and the unicast bearer, for example, the priority indication identifier is used to indicate whether the MBS or the MRB has a higher priority when receiving the MBS or the MRB conflicts with receiving the unicast bearer. Optionally, if the RRC message or the MRB configuration information for an MBS includes the priority indication identifier, the priority of the MBS or the MRB is higher than the priority of the unicast bearer. Optionally, if the RRC message or the MRB configuration information for one MBS includes the priority indicator, and a value of the priority indicator is a value used for indicating that 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 the MRB is higher than the priority of the unicast bearer; if the value of the priority indicator is a value corresponding to the priority for indicating that the priority of the MBS or MRB is lower than the priority 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).

When the conflict between receiving MBS or MRB and unicast load occurs to the UE working in non-MBS, if the corresponding priority indication mark indicates that the priority for receiving MBS or MRB is higher than the priority for receiving unicast load, the UE switches to BWP for receiving MBS or MRB. Optionally, the UE further performs the following operations: the DL-SCH or a channel available for transmitting PTM is received on BWP transmitting the corresponding MBS using the RNTI corresponding to this MBS (or MRB).

Fig. 10 is a block diagram schematically showing the structure of a user equipment UE according to the present invention. As shown in fig. 10, 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 (e.g., random access memory RAM), a Hard Disk Drive (HDD), non-volatile memory (e.g., flash memory), or other memory, among others. The memory 1002 has stored thereon program instructions. Which when executed by the processor 1001 may perform the above-described method performed by the user equipment as described in detail herein.

In addition, the present invention relates to a base station, which 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 radio bearers for receiving the MBS services for the user equipment through RRC messages.

In addition, the invention also relates to a transmission method executed by the base station, which establishes Radio Resource Control (RRC) connection with the user equipment through the base station, configures multicast and broadcast MBS service for the user equipment through RRC message, and configures the radio bearer for receiving the MBS service for the user equipment through the RRC message by the base station.

In addition, the computer-executable instructions or programs running on the apparatus according to the present disclosure may be programs that cause a computer to realize the functions of the embodiments of the present disclosure by controlling a Central Processing Unit (CPU). The program or information processed by the program may be temporarily stored in a volatile memory (such as a random access memory RAM), a Hard Disk Drive (HDD), a nonvolatile memory (such as a flash memory), or other memory system.

Computer-executable instructions or programs for implementing the functions of 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 the programs recorded on the recording medium and execute the programs. The term "computer system" as used herein may be a computer system embedded in the device and may include an operating system or hardware (e.g., 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 stores a program for short-term dynamics, or any other recording medium that is readable by a computer.

Various features or functional blocks of the devices used in the above-described embodiments may be implemented or performed by circuitry (e.g., a single or multiple chip integrated circuits). Circuitry designed to perform the functions described herein may include a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The circuit may be a digital circuit or an analog circuit. Where new integrated circuit technology has emerged as a replacement for existing integrated circuits due to advances in semiconductor technology, one or more embodiments of the present disclosure may also be implemented using such new integrated circuit technology.

Further, the present disclosure is not limited to the above-described embodiments. While various examples of the embodiments have been described, the present disclosure is not so limited. Fixed or non-mobile electronic devices installed indoors or outdoors may be used as terminal devices or communication devices, such as AV devices, kitchen devices, cleaning devices, air conditioners, office devices, vending machines, and other home appliances.

As above, the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings. However, the specific configuration is not limited to the above embodiment, and the present disclosure also includes any design modification without departing from the gist of the present disclosure. In addition, various modifications can be made to the present disclosure within the scope of the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments are also included in the technical scope of the present disclosure. Further, components having the same effects described in the above embodiments may be substituted for each other.

Claims

1. A transmission method executed by user equipment establishes Radio Resource Control (RRC) connection with a base station through the user equipment, the base station configures Multicast and Broadcast (MBS) services for the user equipment through RRC messages, and radio bearers for receiving the MBS services are configured for the user equipment through the RRC messages by the base station.

2. The transmission method performed by the user equipment according to claim 1,

the user equipment receives RRC message from the base station, the RRC message contains the configuration of the multicast broadcast service radio bearer (MRB) aiming at a certain MBS service,

the RRC message includes a first indication identifier, where the first indication identifier is used to indicate an initial delivery mode of the MBS service corresponding to the MRB or the MRB, or is used to indicate a delivery mode of the MBS service corresponding to the MRB or the MRB when the indication identifier is received, or is used to indicate a delivery mode of the MBS service corresponding to the MRB or the MRB when configured, or is used to indicate a delivery mode of the MBS service corresponding to the MRB or the MRB after being configured according to the RRC message.

3. The transmission method performed by the user equipment according to claim 2,

the value of the first indication identifier may be a value corresponding to a point-to-multipoint PTM and a point-to-point PTP respectively indicating that the delivery mode of the MBS service corresponding to the MRB or the MRB is a point-to-multipoint PTM and a point-to-point PTP simultaneously, or a value corresponding to a PTM and a PTP respectively indicating that the delivery mode of the MBS service corresponding to the MRB or the MRB is a PTM and a PTP.

4. The transmission method performed by the user equipment according to claim 1,

the RRC message includes a second indication identifier, where the second indication identifier may be used to indicate whether the initial delivery mode of the MBS service corresponding to the MRB or the MRB employs a PTM or indicate whether the PTM is activated, or indicate whether the PTM delivery mode of the MBS service corresponding to the MRB or the MRB is activated when receiving the indication identifier, or indicate whether the PTM delivery mode of the MBS service corresponding to the MRB or the MRB is activated when configuring the MRB, or indicate whether the PTM delivery mode of the MBS service corresponding to the MRB or the MRB is activated after configuring according to the RRC message.

5. The transmission method performed by the user equipment according to claim 1,

the user equipment receives an RRC message from a base station, the RRC message contains the configuration of a multicast broadcast service radio bearer (MRB) aiming at a certain MBS service, the MRB is used for point-to-multipoint (PTM) transmission of the MBS service,

the RRC message includes a third indication identifier, where the third indication identifier may be used to indicate whether MBS service transmission corresponding to the MRB or MRB starts, or indicate whether an initial delivery mode of the MBS service corresponding to the MRB or MRB uses PTM, or indicate whether a PTM delivery mode is activated, or indicate whether a PTM delivery mode of the MBS service corresponding to the MRB or MRB is activated when receiving the indication identifier, or indicate whether a PTM delivery mode of the MBS service corresponding to the MRB or MRB is activated when configuring the MRB, or indicate whether the PTM delivery mode is activated after configuring the MBS service according to the RRC message, or indicate whether the user equipment receives the corresponding MBS service using the MRB after receiving the configuration of the MRB.

6. The transmission method performed by the user equipment according to claim 1,

the user equipment receives RRC information from a base station, the RRC information comprises configuration information of a multicast broadcast service radio bearer (MRB) aiming at a certain MBS service,

the configuration information of the MRB may include an indicator indicating a cell identifier or a carrier identifier of a cell or a carrier of an MBS service to be or being sent corresponding to the MRB or the MRB, or the configuration information of the MRB includes an indicator indicating a cell identifier or a carrier identifier of a cell or a carrier of a cell used for delivering the MBS service corresponding to the MRB or the MRB, where the cell or the carrier is one of cells or carriers configured for a user equipment.

7. The transmission method performed by the user equipment according to claim 6,

the MRB configuration information may include another indication identifier for indicating a BWP identifier of a bandwidth segment BWP to be or being sent by the MBS service corresponding to the MRB or MRB, or the MRB configuration information may include another indication identifier for indicating a BWP identifier of a BWP used for delivering the MBS service corresponding to the MRB or MRB, where the BWP is one of multiple BWPs configured for a user equipment on a cell used for delivering or about to be or being delivered a corresponding MBS service.

8. A user equipment, comprising:

a processor; and

a memory storing instructions;

wherein the instructions, when executed by the processor, perform the method of any of claims 1 to 7.

9. A base station establishes Radio Resource Control (RRC) connection with user equipment, configures multicast broadcast MBS services for the user equipment through RRC messages, and configures radio bearers for receiving the MBS services for the user equipment through the RRC messages.

10. A transmission method executed by a base station establishes Radio Resource Control (RRC) connection with user equipment through the base station, configures Multicast and Broadcast (MBS) services for the user equipment through RRC messages, and configures radio bearers for receiving the MBS services for the user equipment through the RRC messages by the base station.