CN116458177A

CN116458177A - Method and device for improving MBS service reliability, terminal equipment and network equipment

Info

Publication number: CN116458177A
Application number: CN202180077543.1A
Authority: CN
Inventors: 王淑坤; 石聪
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2023-07-18
Also published as: WO2022165720A1

Abstract

A method and device for improving MBS service reliability, terminal equipment and network equipment are provided, wherein the method comprises the following steps: the terminal equipment sends first information to the network equipment when the first condition is met and/or sends second information to the network equipment when the second condition is met; the network equipment is used for judging whether to execute switching between a first transmission mode and a second transmission mode or not; the first transmission mode refers to a mode of transmitting MBS service data according to a PTM mode, and the second transmission mode refers to a mode of transmitting MBS service data according to a PTP mode; the second information includes a PDCP status report (201).

Description

Method and device for improving MBS service reliability, terminal equipment and network equipment

Technical Field

The embodiment of the application relates to the technical field of mobile communication, in particular to a method and a device for improving the service reliability of multicast broadcast service (Multicast Broadcast Service, MBS), terminal equipment and network equipment.

Background

In a New Radio (NR) system, MBS services of a multicast type are supported. The terminal device receives the multicast type MBS service in a radio resource control (Radio Resource Control, RRC) connected state. The network side may send MBS service data To the terminal device in a Point-To-multipoint (Point To Multipoint, PTM) manner or a Point-To-Point (PTP) manner, and correspondingly, the terminal device may also receive MSB service data in a PTM manner or a PTP manner.

In general, the reliability requirement of the multicast type MBS service is relatively high, and it is clear how to guarantee the high reliability of the MBS service.

Disclosure of Invention

The embodiment of the application provides a method and a device for improving the reliability of MBS service, terminal equipment and network equipment.

The method for improving the reliability of MBS service provided by the embodiment of the application comprises the following steps:

the terminal equipment sends first information to the network equipment when the first condition is met and/or sends second information to the network equipment when the second condition is met;

the network equipment is used for receiving first information and second information, wherein the first information is used for determining whether to execute switching between a first transmission mode and a second transmission mode or not by the network equipment; the first transmission mode refers to a mode of transmitting MBS service data according to a PTM mode, and the second transmission mode refers to a mode of transmitting MBS service data according to a PTP mode;

the second information includes a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) status report.

the network equipment receives first information sent by the terminal equipment under the condition that the first condition is met and/or receives second information sent by the terminal equipment under the condition that the second condition is met;

the second information includes a PDCP status report.

The device for improving the reliability of MBS service provided by the embodiment of the application is applied to terminal equipment, and comprises the following components:

a determining unit for determining whether the first condition and/or the second condition is satisfied;

a sending unit, configured to send first information to the network device if the first condition is met, and/or send second information to the network device if the second condition is met;

the second information includes a PDCP status report.

The device for improving the reliability of the MBS service provided by the embodiment of the application is applied to network equipment, and comprises the following components:

A receiving unit, configured to receive first information sent by the terminal device when the first condition is met, and/or receive second information sent by the terminal device when the second condition is met;

the second information includes a PDCP status report.

The terminal equipment provided by the embodiment of the application comprises a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method for improving the reliability of the MBS service.

The network device provided by the embodiment of the application comprises a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method for improving the reliability of the MBS service.

The chip provided by the embodiment of the application is used for realizing the method for improving the MBS service reliability.

Specifically, the chip includes: and the processor is used for calling and running the computer program from the memory, so that the device provided with the chip executes the method for improving the reliability of the MBS service.

The computer readable storage medium provided in the embodiments of the present application is configured to store a computer program, where the computer program makes a computer execute the above method for improving reliability of MBS service.

The embodiment of the application provides a computer program product, comprising computer program instructions, the computer program instructions cause a computer to perform the above-described method for improving reliability of MBS services.

The computer program provided in the embodiment of the present application, when running on a computer, causes the computer to execute the above method for improving the reliability of MBS service.

According to the technical scheme, on one hand, the terminal equipment sends first information to the network equipment under the condition that the first condition is met, and the network equipment is triggered to execute switching between a first transmission mode and a second transmission mode through the first information; on the other hand, the terminal equipment sends the PDCP status report to the network equipment under the condition that the second condition is met, so that the reliability of MBS service receiving is guaranteed to the greatest extent.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

fig. 1 is a schematic diagram of a communication system architecture provided in an embodiment of the present application;

fig. 2 is a flow chart of a method for improving reliability of MBS service according to an embodiment of the present application;

fig. 3 is a schematic diagram of MBS service transmission according to PTM mode and PTP mode provided in the embodiment of the present application;

fig. 4 is a schematic structural diagram of an apparatus for improving reliability of MBS service according to an embodiment of the present application;

fig. 5 is a schematic diagram of a second structural component of the apparatus for improving reliability of MBS service according to the embodiment of the present application;

fig. 6 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

FIG. 7 is a schematic block diagram of a chip of an embodiment of the present application;

fig. 8 is a schematic block diagram of a communication system provided in an embodiment of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: long term evolution (Long Term Evolution, LTE) systems, LTE frequency division duplex (Frequency Division Duplex, FDD) systems, LTE time division duplex (Time Division Duplex, TDD), systems, 5G communication systems, future communication systems, or the like.

Exemplary, a communication system 100 to which embodiments of the present application apply is shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal 120 (or referred to as a communication terminal, terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminals located within the coverage area. Alternatively, the network device 110 may be an evolved base station (Evolutional Node B, eNB or eNodeB) in the LTE system, or a radio controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device may be a mobile switching center, a relay station, an access point, a vehicle device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a network device in a future communication system, etc.

The communication system 100 further includes at least one terminal 120 located within the coverage area of the network device 110. "terminal" as used herein includes, but is not limited to, connection via wireline, such as via public-switched telephone network (Public Switched Telephone Networks, PSTN), digital subscriber line (Digital Subscriber Line, DSL), digital cable, direct cable connection; and/or another data connection/network; and/or via a wireless interface, e.g., for a cellular network, a wireless local area network (Wireless Local Area Network, WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and/or means of the other terminal arranged to receive/transmit communication signals; and/or internet of things (Internet of Things, ioT) devices. Terminals arranged to communicate over a wireless interface may be referred to as "wireless communication terminals", "wireless terminals" or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellites or cellular telephones; a personal communications system (Personal Communications System, PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; a PDA that can include a radiotelephone, pager, internet/intranet access, web browser, organizer, calendar, and/or a global positioning system (Global Positioning System, GPS) receiver; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A terminal may refer to an access terminal, user Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal in a 5G network or a terminal in a future evolved PLMN, etc.

Alternatively, direct to Device (D2D) communication may be performed between the terminals 120.

Alternatively, the 5G communication system or 5G network may also be referred to as a New Radio (NR) system or NR network.

Fig. 1 illustrates one network device and two terminals, alternatively, the communication system 100 may include multiple network devices and each network device may include other numbers of terminals within a coverage area, which is not limited in this embodiment.

Optionally, the communication system 100 may further include a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that a device having a communication function in a network/system in an embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a network device 110 and a terminal 120 with communication functions, where the network device 110 and the terminal 120 may be specific devices described above, and are not described herein again; the communication device may also include other devices in the communication system 100, such as a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the following describes the technical solutions related to the embodiments of the present application.

With the pursuit of speed, delay, high speed mobility, energy efficiency and diversity and complexity of future life business, the third generation partnership project (3 ^rd Generation Partnership Project,3 GPP) international standards organization began developing 5G. The main application scenario of 5G is: enhanced mobile Ultra-wideband (enhanced Mobile Broadband, emmbb), low latency high reliability communication (URLLC), large-scale Machine-based communication (mctc).

On the one hand, embbs still target users to obtain multimedia content, services and data, and their demand is growing very rapidly. On the other hand, since an eMBB may be deployed in different scenarios, such as indoors, urban, rural, etc., its capabilities and requirements are also quite different, so that detailed analysis must be performed in connection with a specific deployment scenario, not in general. Typical applications of URLLC include: industrial automation, electric power automation, remote medical operation (surgery), traffic safety guarantee and the like. Typical characteristics of mctc include: high connection density, small data volume, delay insensitive traffic, low cost and long service life of the module, etc.

At early deployment of NRs, full NR coverage is difficult to acquire, so typical network coverage is wide area LTE coverage and island coverage mode of NRs. And a large amount of LTE is deployed below 6GHz, and the frequency spectrum below 6GHz which can be used for 5G is few. NR must study spectral applications above 6GHz while high-band coverage is limited and signal fading is fast. Meanwhile, in order to protect the mobile operators from early investment in LTE, a working mode of tight coupling (tight interworking) between LTE and NR is proposed.

RRC state

5G for the purposes of reducing air interface signaling and fast recovery of radio connections, fast recovery of data traffic, a new radio resource control (Radio Resource Control, RRC) state, namely an RRC INACTIVE (RRC_INACTIVE) state, is defined. This state is different from the RRC IDLE (rrc_idle) state and the RRC ACTIVE (rrc_active) state. Wherein,

1) Rrc_idle state (simply referred to as IDLE state): mobility is UE-based cell selection reselection, paging is initiated by a Core Network (CN), and paging areas are configured by the CN. The base station side has no UE context and no RRC connection.

2) Rrc_connected state (CONNECTED state for short): there is an RRC connection and UE contexts on the base station side and UE side. The network side knows that the location of the UE is cell specific. Mobility is network-side controlled mobility. Unicast data may be transmitted between the UE and the base station.

3) Rrc_inactive state (simply referred to as INACTIVE state): mobility is cell selection reselection based on UE, there is a connection between CN-NRs, UE context exists on a certain base station, paging is triggered by RAN, paging area based on RAN is managed by RAN, network side knows UE location is based on paging area level of RAN.

Multimedia broadcast multicast service (Multimedia Broadcast Multicast Service, MBMS)

MBMS is a technology for transmitting data from one data source to a plurality of terminal equipments through a shared network resource, which can effectively utilize the network resource while providing a multimedia service, and realize broadcasting and multicasting of a multimedia service of a higher rate (e.g., 256 kbps).

Due to the low MBMS spectrum efficiency, it is not sufficient to effectively carry and support the operation of the mobile tv type service. In LTE, 3GPP has therefore explicitly proposed to enhance the support capability for the downlink high speed MBMS service and to determine the design requirements for the physical layer and the air interface.

The 3gpp R9 introduces evolved MBMS (eMBMS) into LTE. eMBMS proposes the concept of a single frequency network (Single Frequency Network, SFN), i.e. a multimedia broadcast multicast service single frequency network (Multimedia Broadcast multicast service Single Frequency Network, MBSFN), wherein the MBSFN uses a unified frequency to simultaneously transmit traffic data in all cells, but synchronization between the cells is guaranteed. The method can greatly improve the overall signal-to-noise ratio distribution of the cell, and the frequency spectrum efficiency can be correspondingly and greatly improved. eMBMS implements broadcast and multicast of services based on IP multicast protocols.

In LTE or LTE-Advanced (LTE-a), MBMS has only a broadcast bearer mode and no multicast bearer mode. In addition, the reception of the MBMS service is applicable to terminal devices in an idle state or a connected state.

A single cell point-to-multipoint (Single Cell Point To Multiploint, SC-PTM) concept is introduced in 3gpp r13, SC-PTM being based on the MBMS network architecture.

MBMS introduces new logical channels including Single Cell multicast control channel (SC-MCCH) and Single Cell multicast transport channel (SC-MTCH) and Single Cell-Multicast Transport Channel. The SC-MCCH and SC-MTCH are mapped onto a Downlink-Shared Channel (DL-SCH), and further, the DL-SCH is mapped onto a physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH), wherein the SC-MCCH and SC-MTCH belong to a logical Channel, the DL-SCH belongs to a transport Channel, and the PDSCH belongs to a physical Channel. The SC-MCCH and SC-MTCH do not support hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) operation.

MBMS introduces a new system information block (System Information Block, SIB) type, SIB20. Specifically, the configuration information of the SC-MCCH is transmitted through the SIB20, and one cell has only one SC-MCCH. The configuration information of the SC-MCCH comprises: the modification period of the SC-MCCH, the repetition period of the SC-MCCH, the radio frame and subframe for scheduling the SC-MCCH and other information. Further, 1) the boundary of the modification period of the SC-MCCH satisfies SFN mod m=0, where SFN represents a system frame number of the boundary, and m is a modification period (i.e., SC-MCCH-modification period) of the SC-MCCH configured in SIB20. 2) The radio frame of the scheduling SC-MCCH meets the following conditions: SFN mod MCCH-repetition period = MCCH-Offset, where SFN represents the system frame number of the radio frame, MCCH-repetition period represents the repetition period of the SC-MCCH, and MCCH-Offset represents the Offset of the SC-MCCH. 3) The subframes of the scheduling SC-MCCH are indicated by SC-MCCH-Subframe.

The SC-MCCH is scheduled through a physical downlink control channel (Physical Downlink Control Channel, PDCCH). In one aspect, a new radio network temporary identity (Radio Network Tempory Identity, RNTI), i.e., single Cell RNTI (SC-RNTI), is introduced to identify a PDCCH (e.g., SC-MCCH PDCCH) for scheduling the SC-MCCH, optionally with the SC-RNTI fixed value FFFC. On the other hand, a new RNTI, i.e., a single cell notification RNTI (Single Cell Notification RNTI, SC-N-RNTI) is introduced to identify a PDCCH (e.g., notification PDCCH) for indicating a change notification of the SC-MCCH, optionally, the SC-N-RNTI is fixed to a value of FFFB; further, the change notification may be indicated with one bit of 8 bits (bits) of DCI 1C. In LTE, the configuration information of SC-PTM is based on the SC-MCCH configured by SIB20, and then SC-MCCH configures SC-MTCH for transmitting service data.

Specifically, the SC-MCCH transmits only one message (i.e., scptm configuration) for configuring configuration information of the SC-PTM. The configuration information of the SC-PTM comprises: temporary mobile Group identity (Temporary Mobile Group Identity, TMGI), session identity (session id), group RNTI (G-RNTI), discontinuous reception (Discontinuous Reception, DRX) configuration information, SC-PTM service information of neighbor cells, and the like. Note that SC-PTM in R13 does not support the robust header compression (Robust Header Compression, ROHC) function.

The downlink discontinuous reception of the SC-PTM is controlled by the following parameters: onDurationTimerSCPTM, drx-InactivityTimerSCPTM, SC-MTCH-scheduling cycle, and SC-MTCH-scheduling offset.

When [ (SFN 10) +subframe number ] module (SC-MTCH-scheduling cycle) =sc-MTCH-scheduling offset is satisfied, a timer ondurationtimerscpm is started;

when receiving downlink PDCCH scheduling, starting a timer drx-InactivityTimerSCPTM;

the downstream SC-PTM service is received only when the timer onduration timerscpm or drx-incaactyitimerscpm is running.

The SC-PTM service continuity adopts the MBMS service continuity concept based on SIB15, namely a mode of SIB15 and MBMSInterestindication. The traffic continuity of the terminal device in idle state is based on the concept of frequency priority.

As can be seen from the above description, the configuration of the SC-PTM configures the SC-MCCH based on SIB20 and then configures the SC-MTCH based on the SC-MCCH for transmitting service data.

It should be noted that, the MBMS service in the above scheme includes, but is not limited to, a multicast service, an MBS service, and the like. The embodiment of the application is described by taking an MBS service as an example, and the description of the "MBS service" may be replaced by a "multicast service" or an "MBMS service".

In NR systems, many scenarios require support of multicast type and broadcast type traffic demands, such as in the internet of vehicles, industrial internet, etc. It is necessary to introduce multicast type and broadcast type MBS services in the NR. It should be noted that, the multicast type MBS service refers to an MBS service transmitted through a multicast manner. The broadcast type MBS service refers to an MBS service transmitted through a broadcast manner.

In the NR system, for the multicast type MBS service, the MBS service is addressed to all terminal equipments in a certain group. The terminal equipment receives the multicast MBS service in the RRC connection state, and the terminal equipment can receive the multicast MBS service data in the PTM mode or the PTP mode. Wherein, the MBS service data of PTM mode scrambles the corresponding scheduling information through G-RNTI configured by the network side, and the MBS service data of PTP mode scrambles the corresponding scheduling information through C-RNTI.

The reliability requirement of the multicast MBS service is higher, and the wireless link layer control (Radio Link Control, RLC) confirmation mode (Acknowledged Mode, AM) can be realized by receiving the MBS service data in a PTP mode, so that the MBS service data transmission with higher reliability requirement can be ensured. Based on this, the following technical solutions of the embodiments of the present application are proposed. According to the technical scheme, on one hand, the terminal equipment sends first information to the network equipment under the condition that the first condition is met, and the network equipment is triggered to execute switching between a first transmission mode and a second transmission mode through the first information; on the other hand, the terminal device sends a PDCP status report to the network device in case the second condition is satisfied, thereby guaranteeing the receiving reliability of MBS business to the maximum extent.

Fig. 2 is a flow chart of a method for improving reliability of MBS service according to an embodiment of the present application, as shown in fig. 2, where the method for improving reliability of MBS service includes the following steps:

step 201: the terminal equipment sends first information to the network equipment when the first condition is met and/or sends second information to the network equipment when the second condition is met; the network equipment is used for receiving first information and second information, wherein the first information is used for determining whether to execute switching between a first transmission mode and a second transmission mode or not by the network equipment; the first transmission mode refers to a mode of transmitting MBS service data according to a PTM mode, and the second transmission mode refers to a mode of transmitting MBS service data according to a PTP mode; the second information includes a PDCP status report.

In the embodiment of the present application, in order to enable a terminal device to receive MBS service data, the terminal device receives configuration information of an MBS service sent by a network device, where the configuration information of the MBS service includes at least one of the following: identification information of MBS service and channel configuration information of MBS service. Thus, the terminal device can receive the MBS service data sent by the network device based on the configuration information of the MBS service.

In some optional embodiments of the present application, the configuration information of the MBS service is configured through RRC dedicated signaling.

In some optional embodiments of the present application, identification information of MBS service in the configuration information of MBS service is used for the terminal device to determine which MBS service is received. In some examples, the identification information of the MBS service may be a TMGI, a G-RNTI, or the like.

In some optional embodiments of the present application, channel configuration information of an MBS service in the configuration information of the MBS service is used for the terminal device to determine channel information for receiving the MBS service. In some examples, the channel configuration information of the MBS service may include at least one of: configuration information of a control channel of the MBS service (e.g., configuration information of MCCH), configuration information of a traffic channel of the MBS service (also referred to as a data channel or a transport channel) (e.g., configuration information of MTCH).

In this embodiment of the present application, the MSB service is transmitted in a multicast manner, in other words, the MSB service is a multicast MBS service. Specifically, after receiving an MBS service issued by a core network from a shared tunnel (tunnel), a base station may issue the MSB service to all terminal devices in a group through an air interface. Here, the base station may issue MSB service to all terminal devices in a group in PTP and/or PTM. For example: a group comprises a terminal device 1, a terminal device 2 and a terminal device 3, wherein the base station can issue MBS service to the terminal device 1 in a PTP mode, issue MBS service to the terminal device 2 in a PTP mode, and issue MBS service to the terminal device 3 in a PTP mode; or the base station can issue MBS business to the terminal equipment 1 in a PTP mode, and issue MBS business to the terminal equipment 2 and the terminal equipment 3 in a PTM mode; or, the base station may send the MBS service to the terminal device 1, the terminal device 2 and the terminal device 3 in the PTM mode.

Referring to fig. 3, a shared GTP tunnel (Shared GTP tunnel) is used between the core network and the base station to transmit MBS services, i.e., both PTM-mode MBS services and PTP-mode MBS services are shared with the GTP tunnel. The base station transmits MBS service data to the UE1 and the UE2 according to the PTM mode, and transmits MBS service data to the UE3 according to the PTP mode.

In this embodiment of the present application, what manner the terminal device receives MBS service data may be the following implementation manner:

mode one: the terminal equipment receives the MBS service data by default according to the PTM mode, or receives the MBS service data by default according to the PTP mode, or receives the MBS service data by default according to the PTM mode and the PTP mode.

Mode two: the terminal equipment receives RRC special signaling, and the RRC special signaling is used for configuring whether the terminal equipment receives MBS service data according to a PTP mode, receives MBS service data according to the PTP mode or simultaneously receives MBS service data according to the PTM mode and the PTP mode.

The scheduling information of the MBS service data of the PTM mode is carried in the DCI scrambled by the G-RNTI, and the scheduling information of the MBS service data of the PTP mode is carried in the DCI scrambled by the C-RNTI. The terminal equipment can obtain the scheduling information of the MBS service data of the PTM mode by receiving the DCI scrambled by the G-RNTI, and/or obtain the scheduling information of the MBS service data of the PTP mode by receiving the DCI scrambled by the C-RNTI. Here, the scheduling information of the MBS service data is used to determine time-frequency resource information for transmitting the MBS service data, etc.

In the embodiment of the present application, the network device may perform dynamic switching between the PTP mode and the PTM mode to adjust the mode of receiving MBS service data by the terminal device.

For convenience of description, in the embodiment of the present application, a manner of transmitting MBS service data in a PTM manner is referred to as a first transmission manner, and a manner of transmitting MBS service data in a PTP manner is referred to as a second transmission manner.

In the embodiment of the application, the terminal device sends the first information to the network device when the first condition is met, and/or sends the second information to the network device when the second condition is met; accordingly, the network device receives the first information sent by the terminal device in the case that the first condition is satisfied, and/or receives the second information sent by the terminal device in the case that the second condition is satisfied. The network equipment is used for receiving first information and second information, wherein the first information is used for determining whether to execute switching between a first transmission mode and a second transmission mode or not by the network equipment; the second information includes a PDCP status report. The following description will be given in terms of the case.

Case one

In some optional embodiments of the present application, the network device sends MBS service data to the terminal device according to the first transmission mode, and correspondingly, the terminal device receives MBS service data transmitted by the network device according to the first transmission mode. If the terminal equipment detects that the first condition is met, the terminal equipment sends first information to the network equipment, wherein the first information is used for determining whether to execute switching between a first transmission mode and a second transmission mode or not by the network equipment.

In some optional embodiments of the present application, the first condition includes at least one of:

the number of times that the terminal equipment does not successfully receive Transport Block (TB) data exceeds a first threshold;

and in the case that the terminal equipment does not successfully receive one TB data, the next new TB data of the one TB data is scheduled for transmission.

In the above scheme, the multiple transmissions of the one TB data correspond to the same hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) process identity.

In the above solution, optionally, the first threshold is configured through RRC dedicated signaling.

In the above scheme, the terminal device may determine that the next new TB data is scheduled for transmission by: the terminal device successfully receives the next new TB data, or the terminal device detects scheduling information of the next new TB data.

And the terminal equipment sends first information to the network equipment under the condition that the first condition is met, wherein the first information comprises at least one of the following components:

the first request message is used for requesting the network equipment to switch the first transmission mode into the second transmission mode;

Channel state information (Channel State Information, CSI) reporting for triggering the network device to switch the first transmission mode to the second transmission mode.

For the network equipment, after receiving the first information sent by the terminal equipment, the network equipment switches the first transmission mode to the second transmission mode, namely sends MBS service data to the terminal equipment according to the PTP mode.

In some alternative embodiments, the network device sends a first switching command to the terminal device, and accordingly, the terminal device receives the first switching command sent by the network device, where the first switching command is used to instruct to switch the first transmission mode to the second transmission mode. Thus, the terminal equipment receives MBS service data sent by the network equipment according to the PTP mode.

Case two

In some optional embodiments of the present application, if the terminal device detects that the second condition is met, the terminal device sends second information to the network device, where the second information is a PDCP status report.

In some optional embodiments of the present application, the second condition is: and the measurement result of the terminal equipment is lower than a second threshold. Based on this, the PDCP status report is used to trigger the network device to switch the first transmission mode to the second transmission mode. Here, optionally, the measurement results include channel measurement results and/or cell signal quality measurement results. The second threshold is configured by RRC dedicated signaling. In some examples, the measured quantity of the measurement result includes a reference signal received power (Reference Signal Received Power, RSRP) and/or a reference signal received quality (Reference Signal Receiving Quality, RSRQ).

And the terminal equipment sends a PDCP state report to the network equipment under the condition that the second condition is met.

Case three

In some optional embodiments of the present application, the second condition includes at least one of:

the terminal equipment receives first indication information sent by the network equipment, wherein the first indication information is used for indicating the terminal equipment to receive MBS service data according to a PTP mode;

the terminal equipment determines to receive MBS service data according to a PTP mode;

and the terminal equipment determines DCI scheduling transmission of MBS service data scrambled by the C-RNTI.

In some optional embodiments of the present application, the network device described in the foregoing solution may be a base station, such as a gNB.

Fig. 4 is a schematic structural diagram of an apparatus for improving reliability of MBS service according to an embodiment of the present application, which is applied to a terminal device, as shown in fig. 4, where the apparatus for improving reliability of MBS service includes:

a determining unit 401 for determining whether the first condition and/or the second condition is satisfied;

a sending unit 402, configured to send first information to the network device if the first condition is met, and/or send second information to the network device if the second condition is met;

the second information includes a PDCP status report.

In some optional embodiments of the present application, the apparatus further comprises:

and a receiving unit 403, configured to receive MBS service data transmitted by the network device according to the first transmission mode.

the number of times that the terminal equipment does not successfully receive one TB data exceeds a first threshold;

In some optional embodiments of the present application, the multiple transmissions of the one TB data correspond to the same HARQ process identifier.

In some optional embodiments of the present application, the first threshold is configured through RRC dedicated signaling.

In some optional embodiments of the present application, the first information includes at least one of:

and the CSI report is used for triggering the network equipment to switch the first transmission mode into the second transmission mode.

In some optional embodiments of the present application, the second condition is: and the measurement result of the terminal equipment is lower than a second threshold.

In some optional embodiments of the present application, the PDCP status report is configured to trigger the network device to switch the first transmission mode to the second transmission mode.

In some alternative embodiments of the present application, the measurement results include channel measurement results and/or cell signal quality measurement results.

In some optional embodiments of the present application, the second threshold is configured through RRC dedicated signaling.

a receiving unit 403, configured to receive a first switching command sent by the network device, where the first switching command is used to instruct to switch the first transmission mode to the second transmission mode.

a receiving unit 403, configured to receive configuration information of an MBS service sent by the network device, where the configuration information of the MBS service includes at least one of the following: identification information of MBS service and channel configuration information of MBS service.

It should be understood by those skilled in the art that the above description of the apparatus for improving MBS service reliability according to the embodiments of the present application may be understood with reference to the description of the method for improving MBS service reliability according to the embodiments of the present application.

Fig. 5 is a schematic diagram of a second structural component of an apparatus for improving reliability of MBS service according to an embodiment of the present application, where the apparatus for improving reliability of MBS service is applied to a network device, as shown in fig. 5, and includes:

a receiving unit 501, configured to receive first information sent by a terminal device when a first condition is met, and/or receive second information sent by the terminal device when a second condition is met;

the second information includes a PDCP status report.

and a sending unit 502, configured to send MBS service data to the terminal device according to the first transmission manner.

a sending unit 502, configured to send a first switching command to the terminal device, where the first switching command is used to instruct to switch the first transmission mode to the second transmission mode.

a sending unit 502, configured to send configuration information of an MBS service to the terminal device, where the configuration information of the MBS service includes at least one of the following: identification information of MBS service and channel configuration information of MBS service.

Fig. 6 is a schematic structural diagram of a communication device 600 provided in an embodiment of the present application. The communication device may be a terminal device or a network device, and the communication device 600 shown in fig. 6 includes a processor 610, where the processor 610 may call and execute a computer program from a memory to implement the methods in the embodiments of the present application.

Optionally, as shown in fig. 6, the communication device 600 may also include a memory 620. Wherein the processor 610 may call and run a computer program from the memory 620 to implement the methods in embodiments of the present application.

The memory 620 may be a separate device from the processor 610 or may be integrated into the processor 610.

Optionally, as shown in fig. 6, the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, and in particular, may send information or data to other devices, or receive information or data sent by other devices.

The transceiver 630 may include a transmitter and a receiver, among others. Transceiver 630 may further include antennas, the number of which may be one or more.

Optionally, the communication device 600 may be specifically a network device in the embodiment of the present application, and the communication device 600 may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the communication device 600 may be specifically a mobile terminal/terminal device in the embodiment of the present application, and the communication device 600 may implement corresponding processes implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which are not described herein for brevity.

Fig. 7 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 700 shown in fig. 7 includes a processor 710, and the processor 710 may call and run a computer program from a memory to implement the methods in the embodiments of the present application.

Optionally, as shown in fig. 7, chip 700 may also include memory 720. Wherein the processor 710 may call and run a computer program from the memory 720 to implement the methods in embodiments of the present application.

Wherein the memory 720 may be a separate device from the processor 710 or may be integrated into the processor 710.

Optionally, the chip 700 may also include an input interface 730. The processor 710 may control the input interface 730 to communicate with other devices or chips, and in particular, may obtain information or data sent by other devices or chips.

Optionally, the chip 700 may further include an output interface 740. The processor 710 may control the output interface 740 to communicate with other devices or chips, and in particular, may output information or data to other devices or chips.

Optionally, the chip may be applied to a network device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the chip may be applied to a mobile terminal/terminal device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein for brevity.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

Fig. 8 is a schematic block diagram of a communication system 800 provided in an embodiment of the present application. As shown in fig. 8, the communication system 800 includes a terminal device 810 and a network device 820.

The terminal device 810 may be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 820 may be used to implement the corresponding functions implemented by the network device in the above method, which are not described herein for brevity.

It should be appreciated that the processor of an embodiment of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

It will be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memory is exemplary but not limiting, and for example, the memory in the embodiments of the present application may be Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), direct RAM (DR RAM), and the like. That is, the memory in embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

Embodiments of the present application also provide a computer-readable storage medium for storing a computer program.

Optionally, the computer readable storage medium may be applied to a network device in the embodiments of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the network device in each method in the embodiments of the present application, which is not described herein for brevity.

Optionally, the computer readable storage medium may be applied to a mobile terminal/terminal device in the embodiments of the present application, and the computer program causes a computer to execute a corresponding procedure implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, which is not described herein for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to a network device in the embodiments of the present application, and the computer program instructions cause the computer to execute corresponding flows implemented by the network device in the methods in the embodiments of the present application, which are not described herein for brevity.

Optionally, the computer program product may be applied to a mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions cause a computer to execute corresponding processes implemented by the mobile terminal/terminal device in the methods in the embodiments of the present application, which are not described herein for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to a network device in the embodiments of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the network device in each method in the embodiments of the present application, which is not described herein for brevity.

Optionally, the computer program may be applied to a mobile terminal/terminal device in the embodiments of the present application, where the computer program when run on a computer causes the computer to execute corresponding processes implemented by the mobile terminal/terminal device in the methods in the embodiments of the present application, and for brevity, will not be described herein.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method for improving reliability of multicast broadcast service MBS service, the method comprising:

the terminal equipment sends first information to the network equipment when the first condition is met and/or sends second information to the network equipment when the second condition is met;

the network equipment is used for receiving first information and second information, wherein the first information is used for determining whether to execute switching between a first transmission mode and a second transmission mode or not by the network equipment; the first transmission mode is a mode for transmitting MBS service data according to a point-to-multipoint PTM mode, and the second transmission mode is a mode for transmitting MBS service data according to a point-to-point PTP mode;

the second information includes a packet data convergence protocol PDCP status report.
The method of claim 1, wherein before the terminal device sends the first information and/or the second information to the network device, the method further comprises:

And the terminal equipment receives MBS service data transmitted by the network equipment according to the first transmission mode.
The method of claim 1 or 2, wherein the first condition comprises at least one of:

the number of times that the terminal equipment does not successfully receive the TB data of one transmission block exceeds a first threshold;

and in the case that the terminal equipment does not successfully receive one TB data, the next new TB data of the one TB data is scheduled for transmission.
The method of claim 3 wherein the multiple transmissions of the one TB data correspond to the same hybrid automatic repeat request, HARQ, process identification.
The method of claim 3 or 4, wherein the first threshold is configured by radio resource control, RRC, dedicated signaling.
The method of any of claims 3 to 5, wherein the first information comprises at least one of:

the first request message is used for requesting the network equipment to switch the first transmission mode into the second transmission mode;

and the Channel State Information (CSI) report is used for triggering the network equipment to switch the first transmission mode into the second transmission mode.
The method of claim 1 or 2, wherein the second condition is: and the measurement result of the terminal equipment is lower than a second threshold.
The method of claim 7, wherein the PDCP status report is used to trigger the network device to switch the first transmission mode to the second transmission mode.
The method according to claim 7 or 8, wherein the measurements comprise channel measurements and/or cell signal quality measurements.
The method according to any of claims 7 to 9, wherein the second threshold is configured by RRC dedicated signaling.
The method of claim 1 or 2, wherein the second condition comprises at least one of:

the terminal equipment receives first indication information sent by the network equipment, wherein the first indication information is used for indicating the terminal equipment to receive MBS service data according to a PTP mode;

the terminal equipment determines to receive MBS service data according to a PTP mode;

and the terminal equipment determines downlink control information DCI (control information) scrambled by the MBS service data through a cell radio network temporary identifier C-RNTI to schedule transmission.
The method of any one of claims 1 to 11, wherein the method further comprises:

The terminal equipment receives a first switching command sent by the network equipment, wherein the first switching command is used for indicating to switch the first transmission mode to the second transmission mode.
The method of any one of claims 1 to 12, wherein the method further comprises:

the terminal equipment receives configuration information of MBS service sent by the network equipment, wherein the configuration information of the MBS service comprises at least one of the following components: identification information of MBS service and channel configuration information of MBS service.
A method for improving reliability of MBS service, the method comprising:

the network equipment receives first information sent by the terminal equipment under the condition that the first condition is met and/or receives second information sent by the terminal equipment under the condition that the second condition is met;

the network equipment is used for receiving first information and second information, wherein the first information is used for determining whether to execute switching between a first transmission mode and a second transmission mode or not by the network equipment; the first transmission mode refers to a mode of transmitting MBS service data according to a PTM mode, and the second transmission mode refers to a mode of transmitting MBS service data according to a PTP mode;

the second information includes a PDCP status report.
The method of claim 14, wherein prior to the network device receiving the first information and/or the second information sent by the terminal device, the method further comprises:

And the network equipment sends MBS service data to the terminal equipment according to the first transmission mode.
The method of claim 14 or 15, wherein the first condition comprises at least one of:

the number of times that the terminal equipment does not successfully receive one TB data exceeds a first threshold;

and in the case that the terminal equipment does not successfully receive one TB data, the next new TB data of the one TB data is scheduled for transmission.
The method of claim 16, wherein the multiple transmissions of the one TB data correspond to the same HARQ process identification.
The method of claim 16 or 17, wherein the first threshold is configured by RRC dedicated signaling.
The method of any of claims 16 to 18, wherein the first information comprises at least one of:

the first request message is used for requesting the network equipment to switch the first transmission mode into the second transmission mode;

and the CSI report is used for triggering the network equipment to switch the first transmission mode into the second transmission mode.
The method of claim 14 or 15, wherein the second condition is: and the measurement result of the terminal equipment is lower than a second threshold.
The method of claim 20, wherein the PDCP status report is used to trigger the network device to switch the first transmission mode to the second transmission mode.
The method according to claim 20 or 21, wherein the measurements comprise channel measurements and/or cell signal quality measurements.
The method of any of claims 20 to 22, wherein the second threshold is configured by RRC dedicated signaling.
The method of claim 14 or 15, wherein the second condition comprises at least one of:

the terminal equipment receives first indication information sent by the network equipment, wherein the first indication information is used for indicating the terminal equipment to receive MBS service data according to a PTP mode;

the terminal equipment determines to receive MBS service data according to a PTP mode;

and the terminal equipment determines DCI scheduling transmission of MBS service data scrambled by the C-RNTI.
The method of any one of claims 14 to 24, wherein the method further comprises:

the network device sends a first switching command to the terminal device, where the first switching command is used to instruct to switch the first transmission mode to the second transmission mode.
The method of any one of claims 14 to 25, wherein the method further comprises:

the network device sends configuration information of MBS service to the terminal device, wherein the configuration information of MBS service comprises at least one of the following: identification information of MBS service and channel configuration information of MBS service.
An apparatus for improving reliability of MBS service, applied to a terminal device, the apparatus comprising:

a determining unit for determining whether the first condition and/or the second condition is satisfied;

a sending unit, configured to send first information to the network device if the first condition is met, and/or send second information to the network device if the second condition is met;

the network equipment is used for receiving first information and second information, wherein the first information is used for determining whether to execute switching between a first transmission mode and a second transmission mode or not by the network equipment; the first transmission mode refers to a mode of transmitting MBS service data according to a PTM mode, and the second transmission mode refers to a mode of transmitting MBS service data according to a PTP mode;

the second information includes a PDCP status report.
The apparatus of claim 27, wherein the apparatus further comprises:

and the receiving unit is used for receiving the MBS service data transmitted by the network equipment according to the first transmission mode.
The apparatus of claim 27 or 28, wherein the first condition comprises at least one of:

the number of times that the terminal equipment does not successfully receive one TB data exceeds a first threshold;

and in the case that the terminal equipment does not successfully receive one TB data, the next new TB data of the one TB data is scheduled for transmission.
The apparatus of claim 29, wherein the multiple transmissions of the one TB data correspond to the same HARQ process identification.
The apparatus of claim 29 or 30, wherein the first threshold is configured by RRC dedicated signaling.
The apparatus of any of claims 29-31, wherein the first information comprises at least one of:

the first request message is used for requesting the network equipment to switch the first transmission mode into the second transmission mode;

and the CSI report is used for triggering the network equipment to switch the first transmission mode into the second transmission mode.
The apparatus of claim 27 or 28, wherein the second condition is: and the measurement result of the terminal equipment is lower than a second threshold.
The apparatus of claim 33, wherein the PDCP status report is used to trigger the network device to switch the first transmission mode to the second transmission mode.
The apparatus of claim 33 or 34, wherein the measurements comprise channel measurements and/or cell signal quality measurements.
The apparatus of any of claims 33-35, wherein the second threshold is configured by RRC dedicated signaling.
The apparatus of claim 27 or 28, wherein the second condition comprises at least one of:

the terminal equipment receives first indication information sent by the network equipment, wherein the first indication information is used for indicating the terminal equipment to receive MBS service data according to a PTP mode;

the terminal equipment determines to receive MBS service data according to a PTP mode;

and the terminal equipment determines DCI scheduling transmission of MBS service data scrambled by the C-RNTI.
The apparatus of any one of claims 27 to 37, wherein the apparatus further comprises:

the receiving unit is used for receiving a first switching command sent by the network equipment, wherein the first switching command is used for indicating to switch the first transmission mode to the second transmission mode.
The apparatus of any one of claims 27 to 38, wherein the apparatus further comprises:

a receiving unit, configured to receive configuration information of an MBS service sent by the network device, where the configuration information of the MBS service includes at least one of the following: identification information of MBS service and channel configuration information of MBS service.
An apparatus for improving reliability of MBS service, applied to a network device, the apparatus comprising:

a receiving unit, configured to receive first information sent by the terminal device when the first condition is met, and/or receive second information sent by the terminal device when the second condition is met;

the network equipment is used for receiving first information and second information, wherein the first information is used for determining whether to execute switching between a first transmission mode and a second transmission mode or not by the network equipment; the first transmission mode refers to a mode of transmitting MBS service data according to a PTM mode, and the second transmission mode refers to a mode of transmitting MBS service data according to a PTP mode;

the second information includes a PDCP status report.
The apparatus of claim 40, wherein the apparatus further comprises:

and the sending unit is used for sending MBS service data to the terminal equipment according to the first transmission mode.
The apparatus of claim 40 or 41, wherein the first condition comprises at least one of:

the number of times that the terminal equipment does not successfully receive one TB data exceeds a first threshold;

and in the case that the terminal equipment does not successfully receive one TB data, the next new TB data of the one TB data is scheduled for transmission.
The apparatus of claim 42, wherein the multiple transmissions of the one TB data correspond to the same HARQ process identification.
The apparatus of claim 42 or 43, wherein the first threshold is configured by RRC dedicated signaling.
The apparatus of any one of claims 42 to 44, wherein the first information comprises at least one of:

the first request message is used for requesting the network equipment to switch the first transmission mode into the second transmission mode;

and the CSI report is used for triggering the network equipment to switch the first transmission mode into the second transmission mode.
The apparatus of claim 40 or 41, wherein the second condition is: and the measurement result of the terminal equipment is lower than a second threshold.
The apparatus of claim 46, wherein the PDCP status report is used to trigger the network device to switch the first transmission mode to the second transmission mode.
The apparatus of claim 46 or 47, wherein the measurements comprise channel measurements and/or cell signal quality measurements.
The apparatus of any of claims 46 to 48, wherein the second threshold is configured by RRC dedicated signaling.
The apparatus of claim 40 or 41, wherein the second condition comprises at least one of:

the terminal equipment receives first indication information sent by the network equipment, wherein the first indication information is used for indicating the terminal equipment to receive MBS service data according to a PTP mode;

the terminal equipment determines to receive MBS service data according to a PTP mode;

and the terminal equipment determines DCI scheduling transmission of MBS service data scrambled by the C-RNTI.
The apparatus of any one of claims 40 to 50, wherein the apparatus further comprises:

and the sending unit is used for sending a first switching command to the terminal equipment, wherein the first switching command is used for indicating to switch the first transmission mode to the second transmission mode.
The apparatus of any one of claims 40 to 51, wherein the apparatus further comprises:

a sending unit, configured to send configuration information of an MBS service to the terminal device, where the configuration information of the MBS service includes at least one of the following: identification information of MBS service and channel configuration information of MBS service.
A terminal device, comprising: a processor and a memory for storing a computer program, the processor being adapted to invoke and run the computer program stored in the memory, to perform the method according to any of claims 1 to 13.
A network device, comprising: a processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory, performing the method of any of claims 14 to 26.
A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 13.
A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any of claims 14 to 26.
A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 13.
A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 14 to 26.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 13.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 14 to 26.
A computer program which causes a computer to perform the method of any one of claims 1 to 13.
A computer program which causes a computer to perform the method of any of claims 14 to 26.