CN117528425A

CN117528425A - Transmission method, terminal, equipment and storage medium for multicast broadcast MBS service

Info

Publication number: CN117528425A
Application number: CN202210908489.7A
Authority: CN
Inventors: 赵亚利
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2024-02-06

Abstract

The transmission method, the terminal, the device and the storage medium for the multicast broadcast MBS service provided by the application are characterized in that the first configuration information is obtained, and the first configuration information comprises the following steps: the first terminal receives end-to-end configuration information required by MBS service and/or direct communication interface configuration information required by MBS service; and receiving the MBS service from a second terminal based on the first configuration information, wherein the second terminal is a relay terminal or a terminal supporting MBS service forwarding. By the scheme, the first terminal can receive the MBS service from the second terminal based on the first configuration information by acquiring the first configuration information comprising the end-to-end configuration information required by the remote terminal for receiving the MBS service and/or the direct communication interface configuration information required by the remote terminal for receiving the MBS service, so that the receiving problem of the MBS service of the first terminal in a network coverage blind area is effectively solved.

Description

Transmission method, terminal, equipment and storage medium for multicast broadcast MBS service

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, a terminal, an apparatus, and a storage medium for transmitting a multicast broadcast MBS service.

Background

At present, MBS (Multicast and Broadcast Services, multicast broadcast service) is issued by a base station, and only terminals within the coverage area of the base station can receive the MBS service.

However, in the actual network deployment scenario or in the scenario that the ground network is partially paralyzed due to the disaster, a certain coverage blind area may exist, and for the terminal in the coverage blind area, only the network device can be accessed through the relay, and how to receive the MBS service through the remote terminal of the relay access network device becomes the problem to be solved at present.

Disclosure of Invention

The application provides a transmission method, a terminal, equipment and a storage medium of multicast broadcast MBS service, so as to solve the problem that a terminal in a network coverage blind area receives MBS service.

According to a first aspect of the present application, there is provided a transmission method of a multicast broadcast MBS service, applied to a first terminal, the method comprising:

acquiring first configuration information, wherein the first configuration information comprises: the first terminal receives end-to-end configuration information required by MBS service and/or direct communication interface configuration information required by MBS service;

and receiving the MBS service from a second terminal based on the first configuration information, wherein the second terminal is a relay terminal or a terminal supporting MBS service forwarding.

In one embodiment, the acquiring the first configuration information includes: and receiving the first configuration information sent by the network equipment.

In one embodiment, the acquiring the first configuration information includes: and receiving end-to-end configuration information required by the first terminal for receiving the MBS service and transmitted by the network equipment, and/or receiving direct communication interface configuration information required by the first terminal for receiving the MBS service and transmitted by the second terminal through a direct communication interface.

In one embodiment, the acquiring the first configuration information includes:

sending first indication information to network equipment, wherein the first indication information comprises MBS service of interest or frequency points of MBS service of interest of the first terminal;

first configuration information determined by the network device based on the first indication information is received.

In one embodiment, the first indication information further includes at least one of:

the MBS service needs to be forwarded through a second terminal;

forwarding the identification of the candidate second terminal of the MBS service;

forwarding the identification of the candidate direct communication PC5 link of the MBS service;

the first terminal suggests a transmission mode used when the direct communication interface MBS service is forwarded.

In one embodiment, the first configuration information includes at least one of:

forwarding identification information of a second terminal of the MBS service;

MBS service identification;

PDCP layer configuration information corresponding to an end-to-end MRB between the first terminal and a network device;

end-to-end MRB between the first terminal and the second terminal controls RLC layer configuration information in a radio resource control corresponding to a direct communication interface;

the end-to-end MRB between the first terminal and the second terminal is used for controlling MAC layer configuration information in a medium access corresponding to a direct communication interface;

end-to-end MRB between the first terminal and the second terminal is configured with information of a physical PHY layer corresponding to a direct communication interface;

the first terminal receives the SL DRX configuration at a direct communication interface used by MBS service at the direct communication interface.

In one embodiment, after the first configuration information is obtained, at least one of the following operations is performed based on the first configuration information:

establishing an end-to-end PDCP entity corresponding to the MRB;

an RLC entity of a direct communication interface corresponding to the MRB is established;

indicating the MBS service identification corresponding to the MRB to a high layer;

and under the condition that the SDAP entity corresponding to the MBS service identifier is not established, establishing the SDAP entity corresponding to the MBS service identifier.

In one embodiment, if the first terminal cannot receive the MBS service from the second terminal, the method further includes:

triggering the first terminal to execute relay and/or cell reselection; or alternatively

Triggering the first terminal to send second indication information to the network equipment, wherein the second indication information is used for indicating that the first terminal cannot receive MBS service and/or an identifier of the MBS service cannot be received through the second terminal.

According to a second aspect of the present application, there is provided a transmission method of a multicast broadcast MBS service, applied to a second terminal, where the second terminal is a relay terminal or a terminal supporting MBS service forwarding, the method comprising:

acquiring second configuration information, wherein the second configuration information comprises: the second terminal carries out direct communication interface configuration information required by MBS service forwarding;

and forwarding MBS service data to the first terminal based on the second configuration information.

In one embodiment, the obtaining the second configuration information includes: and receiving the second configuration information sent by the network equipment.

In one embodiment, the method further comprises:

acquiring direct communication interface configuration information required by the first terminal for receiving MBS service from network equipment;

And forwarding direct communication interface configuration information required by the first terminal for receiving MBS service to the first terminal through a direct communication interface between the first terminal and the second terminal.

In one embodiment, the obtaining the second configuration information includes: and receiving direct communication interface configuration information required by MBS service forwarding of the second terminal sent by the first terminal through a direct communication interface.

In one embodiment, the second configuration information includes at least one of:

MBS service identification;

mapping relation between the RLC channel corresponding to MRB of Uu interface and the RLC channel of direct communication interface;

end-to-end MRB between the first terminal and the second terminal is corresponding to RLC layer configuration information of a direct communication interface;

end-to-end MRB between the first terminal and the second terminal is configured with information of a physical PHY layer corresponding to a direct communication interface; the second terminal forwards the transmission mode of MBS business at the direct communication interface;

and the second terminal forwards the direct communication interface SL DRX configuration used by the MBS service on the direct communication interface.

In one embodiment, after the second configuration information is acquired, at least one of the following operations is performed based on the second configuration information:

and storing the mapping relation between the RLC channel corresponding to the Uu interface by the MRB and the RLC channel corresponding to the direct communication interface by the MRB.

In one embodiment, the forwarding MBS service data to the first terminal includes:

after the RLC channel corresponding to the Uu interface receives the MBS service sent by the network equipment, forwarding the MBS service to the first terminal on the RLC channel corresponding to the direct communication interface based on the mapping relation.

According to a third aspect of the present application, there is provided a transmission method of a multicast broadcast MBS service, applied to a network device, the method comprising:

transmitting first configuration information to a first terminal, wherein the first configuration information comprises: the first terminal receives end-to-end configuration information required by MBS service and/or direct communication interface configuration information required by MBS service;

transmitting second configuration information to a second terminal, wherein the second configuration information comprises: the second terminal carries out direct communication interface configuration information required by MBS service forwarding, and the second terminal is a relay terminal or a terminal supporting MBS service forwarding.

In one embodiment, the sending the first configuration information to the first terminal includes:

transmitting end-to-end configuration information required by the first terminal for receiving MBS service to the first terminal; and/or the number of the groups of groups,

and sending the direct communication interface configuration information required by the first terminal for receiving the MBS service to the second terminal, so that the second terminal forwards the direct communication interface configuration information required by the first terminal for receiving the MBS service to the first terminal through a direct communication interface.

In one embodiment, before sending the first configuration information to the first terminal, the method further comprises:

receiving first indication information sent by a first terminal, wherein the first indication information comprises MBS service of interest or frequency points of MBS service of interest of the first terminal;

and determining first configuration information and/or second configuration information based on the first indication information.

In one embodiment, the first indication information includes at least one of:

the MBS service needs to be forwarded through a second terminal;

And the second terminal forwards the transmission mode of the MBS service at the direct communication interface.

In one embodiment, the method further comprises: and determining the second terminal based on the first indication information.

In one embodiment, the determining the second terminal based on the first indication information includes:

in the case where there is only one candidate second terminal, determining the candidate second terminal as the second terminal;

in the case where there are a plurality of candidate second terminals, the second terminals are determined based on at least one of the following information: the maximum number of MRBs supported by the second terminal, load information of the second terminal, moving speed of the second terminal or electric quantity of the second terminal.

forwarding identification information of a second terminal of the MBS service;

MBS service identification;

the second terminal forwards the transmission mode of MBS business at the direct communication interface;

In one embodiment, the method further comprises:

and if the second indication information of the first terminal is received, the second indication information is used for indicating that the first terminal cannot receive the MBS service through the second terminal and/or the identification of the MBS service cannot be received, and the second terminal is re-determined based on the second indication information.

According to a fourth aspect of the present application, there is provided a first terminal comprising:

a first obtaining module configured to obtain first configuration information, where the first configuration information includes: the first terminal receives end-to-end configuration information required by MBS service and/or direct communication interface configuration information required by MBS service;

and a receiving module configured to receive the MBS service from a second terminal based on the first configuration information, wherein the second terminal is a relay terminal or a terminal supporting forwarding of the MBS service.

According to a fifth aspect of the present application, there is provided a second terminal, which is a relay terminal or a terminal supporting MBS service forwarding, comprising:

a second obtaining module configured to obtain second configuration information, the second configuration information including: the second terminal carries out direct communication interface configuration information required by MBS service forwarding;

and the forwarding module is used for forwarding the MBS service data to the first terminal based on the second configuration information.

According to a sixth aspect of the present application, there is provided a network device comprising:

a first sending module configured to send first configuration information to a first terminal, the first configuration information including: the first terminal receives end-to-end configuration information required by MBS service and/or direct communication interface configuration information required by MBS service;

A second transmitting module configured to transmit second configuration information to a second terminal, the second configuration information including: the second terminal carries out direct communication interface configuration information required by MBS service forwarding, and the second terminal is a relay terminal or a terminal supporting MBS service forwarding.

According to a seventh aspect of the present application, there is provided a first terminal comprising:

a memory for storing a computer program;

a transceiver for transceiving data under the control of the processor;

a processor for reading the computer program in the memory and performing the following operations: acquiring first configuration information, wherein the first configuration information comprises: the first terminal receives end-to-end configuration information required by MBS service and/or direct communication interface configuration information required by MBS service; and receiving the MBS service from a second terminal based on the first configuration information, wherein the second terminal is a relay terminal or a terminal supporting MBS service forwarding.

According to an eighth aspect of the present application, there is provided a second terminal, which is a relay terminal or a terminal supporting MBS service forwarding, comprising:

a memory for storing a computer program;

A transceiver for transceiving data under the control of the processor;

a processor for reading the computer program in the memory and performing the following operations: acquiring second configuration information, wherein the second configuration information comprises: the second terminal carries out direct communication interface configuration information required by MBS service forwarding; and forwarding MBS service data to the first terminal based on the second configuration information.

According to a ninth aspect of the present application, there is provided a network device comprising:

a memory for storing a computer program;

a transceiver for transceiving data under the control of the processor;

a processor for reading the computer program in the memory and performing the following operations: transmitting first configuration information to a first terminal, wherein the first configuration information comprises: the first terminal receives end-to-end configuration information required by MBS service and/or direct communication interface configuration information required by MBS service; transmitting second configuration information to a second terminal, wherein the second configuration information comprises: the second terminal carries out direct communication interface configuration information required by MBS service forwarding, and the second terminal is a relay terminal or a terminal supporting MBS service forwarding.

According to a tenth aspect of the present application, there is provided a processor-readable storage medium storing a computer program for causing a processor to execute the transmission method of a multicast broadcast MBS service.

The transmission method, terminal, equipment and storage medium for multicast and broadcast MBS service provided by the application are characterized in that first configuration information is obtained, and the first configuration information comprises: the first terminal receives end-to-end configuration information required by MBS service and/or direct communication interface configuration information required by MBS service; and receiving the MBS service from a second terminal based on the first configuration information, wherein the second terminal is a relay terminal or a terminal supporting MBS service forwarding. By the scheme, the first terminal can receive the MBS service from the second terminal based on the first configuration information by acquiring the first configuration information comprising the end-to-end configuration information required by the remote terminal for receiving the MBS service and/or the direct communication interface configuration information required by the remote terminal for receiving the MBS service, thereby effectively solving the problem of receiving the MBS service when the first terminal is in a network coverage blind area and ensuring the receiving function of the terminal equipment for the MBS service.

It should be appreciated that what is described in the foregoing summary section is not intended to limit key or critical features of embodiments of the present application nor is it intended to be used to limit the scope of the present application. Other features of the present application will become apparent from the description that follows.

Drawings

For a clearer description of the technical solutions of the present application or of the prior art, the drawings that are used in the description of the embodiments or of the prior art will be briefly described, it being obvious that the drawings in the description below are some embodiments of the present application, and that other drawings can be obtained from these drawings without inventive effort for a person skilled in the art.

FIG. 1a is a schematic diagram of cellular network communications;

FIG. 1b is a schematic illustration of direct communication from terminal to terminal;

FIG. 2a is one of the schematic diagrams of relay communication;

FIG. 2b is a second schematic diagram of a relay communication scenario;

FIG. 2c is a third schematic diagram of a relay communication scenario;

fig. 3 is a schematic diagram of a possible application scenario provided in an embodiment of the present application;

fig. 4 is a flow chart of a transmission method of a multicast broadcast MBS service according to an embodiment of the present application;

Fig. 5 is a flow chart of another method for transmitting multicast broadcast MBS service according to an embodiment of the present application;

fig. 6 is a flowchart of another method for transmitting a multicast broadcast MBS service according to an embodiment of the present application;

fig. 7 is a signaling interaction diagram of exemplary embodiment 1 provided in an embodiment of the present application;

fig. 8 is a signaling interaction diagram of exemplary embodiment 2 provided in an embodiment of the present application;

fig. 9 is a signaling interaction diagram of exemplary embodiment 3 provided in an embodiment of the present application;

fig. 10 is one of schematic structural diagrams of a first terminal according to an embodiment of the present application;

fig. 11 is one of schematic structural diagrams of a second terminal according to an embodiment of the present application;

fig. 12 is one of schematic structural diagrams of a network device according to an embodiment of the present application;

fig. 13 is a second schematic structural diagram of the first terminal according to the embodiment of the present application;

fig. 14 is a second schematic structural diagram of a second terminal according to an embodiment of the present application;

fig. 15 is a second schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

The term "and/or" in this application describes an association relationship of an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The term "plurality" in the embodiments of the present application refers to two or more, and other adjectives are similar.

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only 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.

For facilitating understanding of the embodiments of the present application, before describing the specific embodiments of the present application, the technical background of the embodiments of the present application will be explained first:

the current communication methods include wireless communication, direct communication, and L2 relay communication.

In general, the wireless communication adopts a cellular network communication mode, that is, the terminal and the network side device transmit uplink and downlink data/control information through Uu interface, and as shown in fig. 1a, it can be understood that the cellular network communication is a network centralized control communication mode.

Direct communication refers to a manner that a neighboring terminal can perform data transmission in a short range through a direct communication link (also referred to as a sip link or a PC5 link or a bypass or a side link), and a wireless interface corresponding to the sip link is referred to as a direct communication interface (also referred to as a sip link interface or a PC5 interface or a bypass interface or a side link interface), and is specifically shown in fig. 1b, where direct communication is an end-to-end direct communication method, and data does not need to be transferred through a network device.

Wireless communication systems currently support multiple types of relay. To extend the coverage of the Network, a U2N (UE-to-Network) relay (i.e., U2N relay) is introduced, as shown in the U2N relay diagram of fig. 2 a. In order to extend the coverage of the terminal direct communication interface, a U2U (UE-to-UE) relay (i.e. U2U relay) is introduced, as shown in the U2U relay diagram of fig. 2 b. In addition, the U2U relay may also be combined with the U2N relay to support a multi-hop scenario, such as the schematic diagram of the combination of the U2N relay and the U2U relay shown in fig. 2 c.

Considering public security, V2X (Vehicle to Everything, vehicle-to-everything), internet of things, and virtual technology AR/VR, 3GPP (3 rd Generation Partnership Project, third generation partnership project) Rel-17 has raised a stand for NR MBS (Multicast and broadcast services, multicast broadcast service). The NR MBS may use PTP (Point to Point) and PTM (Point to Multi-Point) transmission modes on the air interface, where for the PTM transmission mode, the network device sends a single MBS data packet downstream, and multiple user terminals UE receive MBS services on a PDSCH (Physical Downlink Shared Channel ) indicated by the PDCCH by listening to a PDCCH (Physical Downlink Control Channel ) scrambled by a common G-RNTI (Group RNTI, multicast identifier).

However, for a remote terminal accessing to a network device through a relay terminal, since it is not in the direct coverage of the network, MCCH (MultiCast Control Channel )/MTCH (Multicast Traffic Channel, multicast traffic channel) cannot be directly read, and thus MBS service data cannot be directly received, in this case, how to ensure that the remote terminal can receive MBS service becomes a problem to be solved. In addition, how to realize that such terminals receive MBS service is worth further study for terminals that do not need to directly receive MBS service data from a network device or are more convenient to receive MBS service through other terminal devices.

In view of this, the embodiments of the present application provide a transmission method, a terminal, a device, and a storage medium for multicast broadcast MBS service, where a first terminal that needs to receive MBS service obtains first configuration information including end-to-end configuration information required by the first terminal to receive MBS service and/or direct communication interface configuration information required by the first terminal to receive MBS service, so that the first terminal may receive MBS service from a relay terminal or a second terminal that supports MBS service forwarding based on the first configuration information, thereby effectively solving the problem of MBS service reception when the first terminal is in a network coverage blind area or when the first terminal does not need to directly receive MBS service from a network device.

The following is a description of specific examples.

Fig. 3 is a schematic diagram of a scenario of MBS service transmission provided in the embodiment of the present application, as shown in fig. 3, where the scenario includes a network device 301, a first terminal (the first terminal in the present scenario is a remote terminal) 302, and a second terminal 303 (the second terminal in the present scenario is a relay terminal). In this scenario, the second terminal 303 is in a network coverage scenario of the network device 301, where the first terminal 302 is in a network coverage blind area of the network device 301, and the coverage blind area may be an area outside the signal coverage area, or an area with weaker signal coverage or a corner area, and it is understood that the coverage area of the network device 301 may include other terminal devices besides the second terminal 303, which is not particularly limited in this application. In this embodiment, the network device 301 may be a device that communicates with the second terminal 303, and the network device 301 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area.

In this embodiment, the first terminal may be a remote terminal in an RRC (Radio Resource Control ) connected state (connected state), and by acquiring first configuration information for receiving an MBS service, where the first configuration information may be sent by the network device after the remote terminal sends an interest indication to the network device, including end-to-end configuration information required by the remote terminal to receive the MBS service, and/or direct communication interface configuration information required by the remote terminal to receive the MBS service, the first terminal may complete end-to-end configuration and direct communication interface configuration with a relay terminal for forwarding the MBS service according to the first configuration information, and then acquire the MBS service forwarded by the relay terminal from a direct communication interface between the first terminal and the second terminal.

It can be appreciated that the RRC state of the terminal includes the following: an idle state (idle state), an inactive state (inactive state), and a connected state (connected state), when the first terminal is in the connected state, if there is no data transmission requirement, for example, when the user does not use the first terminal for a long time, the first terminal will return from the connected state to the inactive state, so as to recover the connected state faster. The embodiment illustrates a manner in which the first terminal performs MBS service reception in a connected state.

In one implementation, the network device to which the embodiments of the present application relate may be a base station, where the base station may include a plurality of cells. A base station may also be referred to as an access point, or may refer to a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or by other names, depending on the particular application. The network device may be operable to inter-convert the received air frames with internet protocol (internet protocol, IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiments of the present application may be a network device (base transceiver station, BTS) in a global system for mobile communications (global system for mobile communications, GSM) or code division multiple access (code division multiple access, CDMA), a network device (NodeB) in a wideband code division multiple access (wide-band code division multiple access, WCDMA), an evolved network device (evolutional node B, eNB or e-NodeB) in a long term evolution (long term evolution, LTE) system, a 5G base station in a 5G network architecture (next generation system), a home evolved base station (home evolved node B, heNB), a relay node (relay node), a home base station (femto), a pico base station (pico), and the like.

In another implementation manner, the terminal device provided by the embodiment of the present application may also be referred to as a user equipment or the like. The combination of the terminals includes, but is not limited to, handheld devices and vehicle-mounted devices. For example, the device may be a mobile phone, a tablet computer, a notebook computer, an ultra mobile personal computer (UltraMobile Personal Computer, UMPC), a netbook, a personal digital assistant (Personal Digital Assistant, PDA), or the like, which is not limited in the embodiments of the present application.

It may be appreciated that in other scenarios, the first terminal is not limited to be a remote terminal, and the second terminal is not limited to be a relay terminal, that is, the first terminal and the second terminal in the present application may both be under a coverage area of a network device, and not limited to a relay communication scenario, and the second terminal may be a terminal supporting MBS service forwarding, and not limited to a relay terminal.

Further, in this embodiment, the second terminal is a relay terminal, and the considered situation may be that the first terminal needs to access to the network by using the relay terminal when the network covers the blind area, and the considered situation may be that the first terminal itself may be connected to the network device, that is, in the network coverage area, but the MBS service may not need to be directly transmitted from the network device, but may be transmitted by adopting a mode of interacting with other terminals.

The scene diagram of the application is briefly described above, and the transmission implementation manner of the MBS service is described in detail below. In the following embodiments, a first terminal is taken as a remote device and a second terminal is taken as a relay terminal as an example.

Referring to fig. 4, fig. 4 is a flowchart of a transmission method of a multicast broadcast MBS service, provided in an embodiment of the present application, applied to a remote terminal, where the method includes step S401 and step S402.

Step S401, acquiring first configuration information, where the first configuration information includes: the remote terminal receives the end-to-end configuration information required by the MBS service and/or the direct communication interface configuration information required by the MBS service.

Specifically, the end-to-end configuration information required for the remote terminal to receive the MBS service may include end-to-end configuration information between the remote terminal and the network device and/or end-to-end configuration information between the remote terminal and the relay terminal, and the direct communication interface configuration information required for the remote terminal to receive the MBS service may be direct communication interface configuration information between the remote terminal and the relay terminal.

In practical application, the first configuration information includes end-to-end configuration information required by the remote terminal to receive the MBS service, or the first configuration information includes direct communication interface configuration information required by the remote terminal to receive the MBS service, or the end-to-end configuration information required by the remote terminal to receive the MBS service and the direct communication interface configuration information required by the remote terminal to receive the MBS service.

In one embodiment, the first configuration information may include one or more of the following:

forwarding the identification information of the relay terminal of the MBS service;

MBS service identification;

PDCP layer configuration information corresponding to an end-to-end MRB between a far-end terminal and a network device;

the end-to-end MRB between the remote terminal and the relay terminal controls the configuration information of the RLC layer in the radio resource corresponding to the direct communication interface;

the end-to-end MRB between the remote terminal and the relay terminal is used for controlling the MAC layer configuration information in the medium access corresponding to the direct communication interface;

the end-to-end MRB between the far-end terminal and the relay terminal is configured with information of a physical PHY layer corresponding to a direct communication interface;

the remote terminal receives the SL DRX configuration at the direct communication interface used by the MBS service at the direct communication interface.

Specifically, the identification information of the relay terminal forwarding the MBS service is used for the remote terminal to identify the forwarding party for receiving the MBS service, and different identification information corresponds to different relay terminals. The above-mentioned end-to-end configuration information or direct communication interface configuration information may each include identification information of the relay terminal.

Specifically, the MBS service identifier corresponds to an MBS service received by the remote terminal, and the MBS service identifier may be in various forms, for example, the MBS service identifier may be a TMGI (Temporary Mobile Group ID, temporary mobile group identifier) or a source specific IP multicast address. The above-mentioned end-to-end configuration information or direct communication interface configuration information may include MBS service identification.

Specifically, PDCP layer configuration information corresponding to an end-to-end MRB between a remote terminal and a network device, where the MRB (Mbs Point to Multipoint Radio Bearer, multicast radio bearer) is a channel for carrying MBS service data transmission, and the PDCP (Packet Data Convergence Protocol ) layer is mainly responsible for processing service data of a packet service. In this embodiment, PDCP layer configuration information corresponding to end-to-end MRB between a remote terminal and a network device in the first configuration information may enable a corresponding PDCP entity to be established between the remote terminal and the network device, and effectively guarantee data integrity and transmission security of MBS service data when MBS service is transmitted. The above-mentioned end-to-end configuration information may include PDCP layer configuration information corresponding to an end-to-end MRB between a far-end terminal and a network device.

For PDCP layer configuration information, in some embodiments, the first configuration information may further include or only include PDCP layer configuration information corresponding to MRB between the remote terminal and the relay terminal, and the second configuration information mentioned in the following description includes PDCP layer configuration information corresponding to MRB between the relay terminal and the network device, so as to implement establishment of corresponding PDCP entities at the remote terminal and the relay terminal, and may establish corresponding PDCP entities at the relay terminal and the network device, so as to ensure data integrity and transmission security of MBS service data.

Specifically, the end-to-end MRB between the remote terminal and the relay terminal can establish a corresponding RLC Layer functional entity/MAC Layer functional entity/PHY Layer functional entity at RLC (Radio Link Control, radio link Layer control protocol) Layer configuration information/MAC (MediaAccess Control, medium access control) Layer configuration information/PHY (Physical Layer) Layer configuration information corresponding to the direct communication interface, so as to implement data transmission of MBS service at each protocol Layer. The above-mentioned end-to-end configuration information or direct communication interface configuration information may each include the above-mentioned RLC/MAC/PHY layer configuration information.

Specifically, the remote terminal receives the SL DRX configuration at the direct communication interface used by the MBS service when the direct communication interface receives the MBS service, and the SL DRX (SideLink Discontinuous Reception, direct communication link discontinuous reception) configuration is used for determining when MBS service reception is needed for the remote terminal, so as to achieve power saving of the remote terminal. For example, the SL DRX configuration used by the remote terminal to receive MBS services on the direct communication interface may be matched to the Uu DRX configuration used by the relay terminal to receive MBS services on the direct communication interface, e.g. using the same DRX configuration information. The above-mentioned direct communication interface configuration information may include that the remote terminal receives MBS service usage SL DRX configuration at the direct communication interface.

In one embodiment, the remote terminal may obtain the first configuration information by:

mode one: and receiving the first configuration information sent by the network equipment.

Specifically, the end-to-end configuration information required by the remote terminal to receive the MBS service and/or the direct communication interface configuration information required by the remote terminal to receive the MBS service are sent to the remote terminal by the network device, and specifically, the remote terminal may receive the first configuration information sent by the network device based on a relay communication manner, where the relay communication manner adopts an intermediate device (which may be a relay terminal or other terminal devices capable of performing relay transmission) to perform relay transmission of the first configuration information. It may be appreciated that in some embodiments, the first terminal is under the network coverage of the network device, and the first terminal may directly obtain the first configuration information sent by the network device.

Mode two: and receiving the end-to-end configuration information required by the MBS service received by the remote terminal sent by the network equipment and/or receiving the direct communication interface configuration information required by the MBS service received by the remote terminal sent by the relay terminal through the direct communication interface.

In this embodiment, for the difference of the information content of the first configuration information, the obtaining efficiency of the first configuration information may be effectively improved according to the information content corresponding to the information content obtained from the network device and/or obtained from the direct communication interface of the relay terminal.

In other embodiments, the manner of obtaining the first configuration information by the remote terminal is not limited to the two modes, for example, the remote terminal may also obtain the first configuration information from other terminal devices.

And step S402, receiving MBS service from the relay terminal based on the first configuration information.

In this embodiment, the remote terminal obtains the first configuration information including the end-to-end configuration information required by the remote terminal to receive the MBS service and/or the direct communication interface configuration information required by the remote terminal to receive the MBS service, so that the remote terminal can complete the configuration of the relevant MBS service based on the first configuration information, and then receive the MBS service from the relay terminal, thereby effectively solving the problem of receiving the MBS service when the remote terminal is in the network coverage blind area.

The acquisition of the first configuration information is further described in connection with the following embodiments:

in one embodiment, the remote terminal may acquire the first configuration information by sending the first indication information to the network device, specifically including the following procedures:

the remote terminal sends first indication information to the network equipment, wherein the first indication information comprises MBS service of interest of the first terminal or frequency points of the MBS service of interest;

The remote terminal receives first configuration information determined by the network device based on the first indication information.

Specifically, for a remote terminal CONNECTED to a network device through a relay, if the remote terminal is in an rrc_connected state and interested in an MBS service, the remote terminal may perform an on-demand system on-demand SI request to the network device through an end-to-end RRC signaling (such as a scheduled sibrequest), request to acquire SIB21 (System Information, a system information block 21) for determining a mapping relationship between the MBS service and a frequency point, and after acquiring the SIB21 returned by the network device, the remote terminal determines the MBS service of interest or the frequency point of the MBS service of interest according to the SIB 21.

In this embodiment, after determining the MBS service of interest or the frequency point of the MBS service of interest according to SIB21, the remote terminal sends first indication information to the network device, where the first indication information may be adopted by end-to-end RRC signaling, the mbsintersetindication message carries the first indication information in MBS Interest Indication, and after receiving the mbsintersetindication message, the network device determines first configuration information according to the first indication information and sends the first configuration information to the remote terminal. In one implementation, after receiving the MBSInterestIndication message, the network device determines a relay terminal for forwarding the MBS service according to the first indication information, thereby determining first configuration information.

In other embodiments, the remote terminal may determine the MBS service of interest or the frequency point of the MBS service of interest according to the high-layer indication information, in addition to sending the first indication information to the network device, where SIB21 returned by the network device determines the MBS service of interest or the frequency point of the MBS service of interest. It will be appreciated that the higher layer may be the upper layer of the current protocol layer of the remote terminal.

In one embodiment, the first indication information may further include one or more of:

MBS business needs to be forwarded through a relay terminal;

forwarding the identification of the candidate relay terminal of the MBS service;

the remote terminal suggests a transmission mode used when the direct communication interface MBS service is forwarded.

Specifically, the first indication information includes information that the MBS service needs to be forwarded through the second terminal, so as to indicate that the remote terminal has a requirement that the MBS service is received from the relay terminal, and it can be understood that when the remote terminal sends the first indication information to the network device, the relay terminal for forwarding the MBS service is not determined yet, and may be a relay terminal that the remote terminal currently performs relay communication with the network device, or may be other relay terminals that may implement relay communication between the remote terminal and the network device.

Specifically, in some cases, the remote terminal may access to the network device through multiple relay terminals, for example, the remote terminal may directly communicate with multiple terminal devices, where the terminal devices are in a network coverage area of the network device, in order to facilitate determining relay terminals for forwarding MBS services, the remote terminal may suggest these terminal devices to the network device as candidate relay terminals for forwarding MBS services, and carry, in the first indication information, identifiers of multiple candidate relay terminals suggested by the remote terminal, where it is understood that the identifiers of different candidate relay terminals correspond to a specific candidate relay terminal.

Specifically, in the case that the remote terminal can access the network device through a plurality of relay terminals, a plurality of direct communication PC5 links exist corresponding to each relay terminal, and each PC5 link corresponds to a corresponding PC5 link identifier. Wherein the PC5 link identification may be a combination of a direct communication interface destination address, a source address and a destination address or a combination of a source address, a destination address and an LCID (logical channel identity, logical channel identification);

in particular, the transmission mode used in forwarding the MBS service of the direct communication interface suggested by the remote terminal may include unicast of the direct communication interface, multicast of the direct communication interface or broadcast of the direct communication interface.

In an embodiment, in which the first indication information includes an identifier of a candidate relay terminal forwarding the MBS service, the candidate relay terminal suggested by the remote terminal to the network device may be determined based on a terminal capability of the relay terminal. Specifically, the remote terminal obtains terminal capability indication information of the relay terminal through the direct communication interface, and determines candidate relay terminals for forwarding the proposed MBS service based on the terminal capability indication information, where the terminal capability indication information of the relay terminal at least includes MBS-related capability indication, and MBS-related capabilities may be specifically expressed as one or more of the following: the relay terminal supports MBS service reception; the relay terminal supports MBS broadcast service reception; the relay terminal supports MBS multicast service receiving (further can also carry supported multicast service identification information, such as TMGI); the relay terminal supports G-RNTI (Group RNTI)/G-CS-RNTI (Group Configured Scheduling RNTI, group configuration scheduling radio network temporary identifier); the relay terminal supports MCCH and/or MTCH reception.

In one embodiment, after acquiring the first configuration information, the remote terminal performs one or more of the following operations based on the first configuration information:

Establishing an end-to-end PDCP entity corresponding to the MRB;

indicating the MBS service identification corresponding to the MRB to a high-level;

Specifically, the end-to-end PDCP entity corresponding to the MRB may be an end-to-end PDCP entity corresponding to the MRB between the remote terminal and the network device, or an end-to-end PDCP entity corresponding to the MRB between the remote terminal and the relay terminal.

Specifically, RLC is a radio link control layer protocol in many wireless communication systems, and the RLC layer is located above the MAC layer and is part of L2, and provides segmentation and retransmission services for users and control data through an RLC entity that establishes a direct communication interface corresponding to MRB.

It can be appreciated that the RLC layer is located between the MAC layer and the PDCP layer, and communicates with the PDCP layer through SAP (Service AccessPoint ) and communicates with the MAC layer through a logical channel. The logical channel of the UE is called RLC SDU (or PDCP PDU) by establishing an RLC entity (RLC entity), data received by the RLC entity from the PDCP layer, or data addressed to the PDCP layer. The data received by the RLC entity from the MAC layer, or the data addressed to the MAC layer, is called RLC PDU (or MAC SDU).

Specifically, the SDAP (Service Data Adaption Protocol, service data adaptation protocol) layer is a protocol sub-layer newly defined by a 5G air interface user plane protocol stack for supporting rich QoS characteristics, where each SDAP entity corresponds to one PDU session, and the user terminal can configure an independent SDAP entity for each individual PDU session to transmit corresponding service data, and the SDAP entity established in this embodiment is used to transmit MBS data corresponding to an MBS service identifier.

It should be noted that, the higher layer may be a layer above the current protocol layer, and the embodiments of the present application are not particularly limited with respect to a specific type of the higher layer.

In one implementation manner, considering that the remote terminal cannot receive the MBS service after receiving the first configuration information, the present embodiment makes the following improvements, specifically, if the remote terminal cannot receive the MBS service from the relay terminal, the following operations may be performed:

mode one: triggering a remote terminal to execute relay and/or cell reselection;

specifically, the remote terminal cannot receive the MBS service from the relay terminal, and there may be a situation that the relay terminal cannot be connected to the network or the network signal is weak or the terminal fails, and the remote terminal is triggered to perform relay reselection and/or cell reselection, so as to ensure the reception of the MBS service.

In some embodiments, if the first terminal is a terminal device in the signal coverage area of the network device and cannot receive the MBS service through the second terminal, the cell reselection operation may be triggered and the terminal for forwarding the MBS service may be reselected; or the terminal equipment does not need to carry out cell reselection, and other terminal equipment in the signal coverage range of the current cell is reselected to serve as a terminal for forwarding MBS service; or the terminal device may trigger a cell reselection operation and select other terminal devices as terminals for forwarding MBS services within the new cell signal coverage.

Mode two: triggering the remote terminal to send second indication information to the network equipment, wherein the second indication information is used for indicating that the remote terminal cannot receive MBS service and/or the identification of the MBS service cannot be received through the relay terminal.

Specifically, if the remote terminal and the network device have other connections, for example, direct link (direct link) or other relay link (relay link), the remote terminal sends second indication information to the network device through the other connections, and triggers the network device to reconfigure the relay terminal or other terminal devices for forwarding MBS services for the remote terminal according to the second indication information. Wherein, the sending process of the second indication information can multiplex the signaling form of the first indication information or introduce new signaling.

Referring to fig. 5, fig. 5 is a flowchart of another transmission method of multicast broadcast MBS service provided in an embodiment of the present application, applied to a relay terminal, where the method includes step S501 and step S502:

step S501, obtaining second configuration information, where the second configuration information includes: the relay terminal carries out direct communication interface configuration information required by MBS service forwarding.

In this embodiment, the relay terminal may acquire the second configuration information through the network device, or may acquire the second configuration information from the remote terminal through the direct communication interface. The second configuration information may be determined after the remote terminal sends the first indication information to the network device.

In one implementation, the relay terminal receives the second configuration information sent by the network device, and after receiving the first configuration information sent by the remote terminal, the network device sends the first configuration information and the second configuration information to the remote terminal and the relay terminal, respectively.

In another implementation, the relay terminal receives the direct communication interface configuration information required by the relay terminal for MBS service forwarding sent by the remote terminal through the direct communication interface. Specifically, after receiving the first indication information sent by the remote terminal, the network device determines a relay terminal for forwarding the MBS service, and sends first configuration information to the remote terminal, where the first configuration information may include direct communication interface configuration information required for receiving the MBS service, and after receiving the first configuration information, the remote terminal sends, to the relay terminal through its direct communication interface, direct communication interface configuration information required for forwarding the MBS service by the relay terminal.

Wherein the second configuration information may include one or more of:

MBS service identification;

end-to-end MRB between the remote terminal and the relay terminal is corresponding to RLC layer configuration information of the direct communication interface;

the relay terminal transmits the transmission mode of MBS business at the direct communication interface;

the relay terminal forwards the direct communication interface SL DRX configuration used by MBS service at the direct communication interface.

Specifically, by carrying the MBS service identifier in the second configuration information, when the relay terminal receives the MBS service sent by the network device, the relay terminal may forward the corresponding MBS service to the remote terminal according to the MBS service identifier.

Specifically, the second configuration information carries a mapping relationship between an RLC channel corresponding to the MRB of the Uu interface and an RLC channel of the direct communication interface, and after receiving the corresponding MBS service, the relay terminal may directly perform mapping between the Uu interface RLC channel and the PC5 interface RLC channel, and send data to the remote terminal through the determined PC5 RLC channel.

Specifically, the end-to-end MRB between the remote terminal and the relay terminal can establish the RLC layer functional entity/MAC layer functional entity/PHY layer functional entity corresponding to the RLC layer configuration information/MAC layer configuration information/PHY layer configuration information corresponding to the direct communication interface, so as to realize the data transmission of the MBS service in each protocol layer.

Specifically, the transmission mode of the relay terminal for forwarding the MBS service at the direct communication interface may correspond to the transmission mode used when the remote terminal sends the direct communication interface MBS service suggested by the remote terminal carried in the first indication information to the network device. When receiving MBS service forwarding, the relay terminal can forward the MBS service based on the transmission mode.

Specifically, the relay terminal determines when to forward the MBS service when the relay terminal forwards the MBS service according to a direct communication interface SL DRX configuration used by the direct communication interface for forwarding the MBS service, and the main purpose is to achieve power saving of the relay terminal.

In some embodiments, the second configuration information may include, in addition to direct communication interface configuration information required for MBS service forwarding by the relay terminal, end-to-end configuration information required for MBS service forwarding by the relay terminal, where the relay terminal establishes PDCP entities corresponding to the network device and the remote terminal respectively as an example, and the second configuration information may include PDCP layer configuration information corresponding to MRB between the relay terminal and the network device, and PDCP layer configuration information corresponding to MRB between the relay terminal and the remote terminal, so as to implement establishment of PDCP entities corresponding to the network device and the remote terminal by the relay terminal respectively.

In addition, considering that the remote terminal is not in the signal coverage area of the network device and needs to access to the network device through the relay, in the early preparation of MBS service reception, the relay terminal may be used to send corresponding configuration information to the remote terminal, and the remote terminal receives the corresponding configuration information based on the relay terminal, which specifically includes the following steps:

and forwarding the direct communication interface configuration information required by the first terminal for receiving the MBS service to the first terminal through the direct communication interface between the first terminal and the second terminal.

Step S502, based on the second configuration information, MBS service data is forwarded to the remote terminal.

In one embodiment, after the second configuration information is obtained, at least one of the following operations is performed based on the second configuration information:

It can be appreciated that the RLC layer is located between the MAC layer and the PDCP layer, and communicates with the PDCP layer through the SAP and communicates with the MAC layer through the logical channel. Logical channels of the UE are called RLC SDUs (or PDCP PDUs) by establishing an RLC entity, data received by the RLC entity from the PDCP layer, or data destined to the PDCP layer. The data received by the RLC entity from the MAC layer, or the data addressed to the MAC layer, is called RLC PDU (or MAC SDU).

In this embodiment, by storing the mapping relationship between the RLC channel corresponding to the Uu interface by the MRB and the RLC channel corresponding to the direct communication interface by the MRB in the relay terminal, when the relay terminal receives the corresponding MBS service, mapping between the Uu interface RLC channel and the PC5 interface RLC channel may be directly executed, and data may be sent to the remote terminal through the determined PC5 RLC channel.

In one embodiment, the MBS service data is forwarded to the first terminal according to the following specific procedures:

after the RLC channel corresponding to the Uu interface receives the MBS service sent by the network device, forwarding the MBS service to the first terminal on the RLC channel corresponding to the direct communication interface based on the mapping relationship.

In this embodiment, after receiving the second configuration information, the relay terminal may use an existing flow in a process of receiving the MBS service from the network device, and after performing RLC layer processing on the MBS service, the relay terminal may directly perform mapping between the Uu interface RLC channel and the PC5 interface RLC channel, and send data to the remote terminal through the determined PC5 RLC channel.

Referring to fig. 6, fig. 6 is a flowchart of another transmission method of multicast broadcast MBS service provided in an embodiment of the present application, applied to a network device, and the method includes step S601 and step S602.

Step S601, sending first configuration information to a remote terminal, where the first configuration information includes: the remote terminal receives the end-to-end configuration information required by the MBS service and/or the direct communication interface configuration information required by the MBS service.

Step S602, sending second configuration information to the relay terminal, where the second configuration information includes: the relay terminal carries out direct communication interface configuration information required by MBS service forwarding, and the relay terminal is the relay terminal or a terminal supporting MBS service forwarding.

In other implementations, the relay terminal may receive, from the remote terminal, the direct communication interface configuration information that it needs for MBS service forwarding. Specifically, after receiving the first indication information sent by the remote terminal, the network device determines a relay terminal for forwarding the MBS service, and sends first configuration information to the remote terminal, where the first configuration information may include direct communication interface configuration information required for receiving the MBS service, and after receiving the first configuration information, the remote terminal sends, to the relay terminal through its direct communication interface, direct communication interface configuration information required for forwarding the MBS service by the relay terminal.

It should be noted that, the process of sending the first configuration information and the second configuration information to the remote terminal and the relay terminal by the network device is not sequential, and the above numbers are only convenient for explaining the embodiments of the present application.

Further, the specific process of sending the first configuration information to the remote terminal may include the following steps:

transmitting end-to-end configuration information required by the remote terminal for receiving MBS service to the remote terminal; and/or the number of the groups of groups,

and sending the direct communication interface configuration information required by the remote terminal for receiving the MBS service to the relay terminal, so that the relay terminal forwards the direct communication interface configuration information required by the remote terminal for receiving the MBS service to the remote terminal through the direct communication interface.

Specifically, the terminal-to-terminal configuration information required by the remote terminal to receive the MBS service is sent to the remote terminal, and the terminal-to-terminal configuration information required by the remote terminal to receive the MBS service can be sent to the remote terminal through any relay communication mode of the remote terminal, for example, the remote terminal can access to the network device through a plurality of relays, and the plurality of relays can be used as the communication mode of the remote terminal to realize the transmission of the terminal-to-terminal configuration information required by the remote terminal to receive the MBS service between the remote terminal and the network device; the relay terminal can be the relay terminal which is determined after the network equipment receives the first indication information and used for forwarding the MBS service, and the relay terminal is utilized to transmit the direct communication interface configuration information required by the remote terminal for receiving the MBS service.

In one embodiment, before the first configuration information is sent to the first terminal, the method may further include the steps of:

the first configuration information and/or the second configuration information are determined based on the first indication information.

In one embodiment, the first indication information includes one or more of the following:

MBS business needs to be forwarded through the second terminal;

the second terminal forwards the transmission mode of the MBS service at the direct communication interface.

Specifically, in the case that the remote terminal can access the network device through a plurality of relay terminals, a plurality of direct communication PC5 links exist corresponding to each relay terminal, and each PC5 link corresponds to a corresponding PC5 link identifier. Wherein, the PC5 link identifier can be a combination of a direct communication interface target address, a source address and a target address or a combination of a source address, a target address and an LCID;

In one embodiment, after receiving the first indication information, the network device first determines a relay terminal or other terminal device for forwarding the MBS service, specifically, determines a second terminal based on the first indication information, where the first indication information may include a (candidate) relay terminal suggested by the remote device for forwarding the MBS service.

In one embodiment, determining the second terminal based on the first indication information may include the steps of:

in the case where there is only one candidate second terminal, determining the candidate second terminal as a second terminal;

The load information of the relay terminal may include the number of remote terminals accessing the relay terminal, congestion conditions of Uu interfaces of the relay terminal, and the like.

forwarding identification information of a second terminal of the MBS service;

MBS service identification;

PDCP layer configuration information corresponding to an end-to-end MRB between a first terminal and a network device;

end-to-end MRB between the first terminal and the second terminal controls the configuration information of the RLC layer in the radio resource corresponding to the direct communication interface;

the end-to-end MRB between the first terminal and the second terminal is used for controlling MAC layer configuration information in the medium access corresponding to the direct communication interface;

end-to-end MRB between the first terminal and the second terminal is in the physical PHY layer configuration information corresponding to the direct communication interface;

the first terminal receives a SL DRX configuration at a direct communication interface used by MBS services at the direct communication interface.

Specifically, the MBS service identifier corresponds to an MBS service received by the remote terminal, and the MBS service identifier may be in various forms, for example, the MBS service identifier may be a TMGI or a source specific IP multicast address. The above-mentioned end-to-end configuration information or direct communication interface configuration information may include MBS service identification.

Specifically, PDCP layer configuration information corresponding to an end-to-end MRB between a remote terminal and a network device, where the MRB is a channel for carrying MBS service data transmission, and the PDCP layer is mainly responsible for processing service data of a packet service. In this embodiment, PDCP layer configuration information corresponding to end-to-end MRB between a remote terminal and a network device in the first configuration information may enable a corresponding PDCP entity to be established between the remote terminal and the network device, and effectively guarantee data integrity and transmission security of MBS service data when MBS service is transmitted. The above-mentioned end-to-end configuration information may include PDCP layer configuration information corresponding to an end-to-end MRB between a far-end terminal and a network device.

Specifically, the end-to-end MRB between the remote terminal and the relay terminal can establish a corresponding RLC entity/MAC entity/PHY entity at RLC Layer configuration information/MAC Layer configuration information/PHY (Physical Layer) Layer configuration information corresponding to the direct communication interface, so as to realize data transmission of MBS service at each protocol Layer.

Specifically, the remote terminal receives, at the direct communication interface, a SL DRX configuration for determining when MBS service reception is required when the direct communication interface receives MBS service, where the main purpose is to achieve power saving of the remote terminal, and in one implementation, the SL DRX configuration may be configured to the remote terminal by the relay terminal, and how the specific relay terminal determines the SL DRX configuration depends on the implementation of the relay terminal. For example, the SL DRX configuration used by the remote terminal to receive MBS services on the direct communication interface may be matched to the Uu DRX configuration used by the relay terminal to receive MBS services on the direct communication interface, e.g., the same DRX configuration information is used, and in one embodiment, the second configuration information may include one or more of the following:

MBS service identification;

the second terminal transmits the transmission mode of MBS business in the direct communication interface;

the second terminal forwards the direct communication interface SL DRX configuration used by MBS service at the direct communication interface.

In one embodiment, the method may further comprise the steps of:

if the second indication information of the first terminal is received, the second indication information is used for indicating that the first terminal cannot receive the MBS service through the second terminal and/or the identification of the MBS service cannot be received, and the second terminal is re-determined based on the second indication information.

It should be noted that, the process of the network device receiving the second indication information and redefining the second terminal according to the second indication information may multiplex the process of determining the second terminal by the first indication information, or may redetermine the second terminal in other manners.

In order to facilitate understanding of the present solution, fig. 7 to 9 are respectively signaling interactive diagrams of exemplary embodiments 1 to 3 of the present application, so as to further illustrate a transmission method of a multicast broadcast MBS service provided in the embodiment of the present application, and further take a first terminal as an example of a remote terminal and a second terminal as an example of a relay terminal.

Exemplary embodiment 1, which illustrates a reception method of Remote UE MBS service (Remote terminal MBS broadcast service):

step S11: the remote terminal sends the first indication information to the network device through the end-to-end RRC signaling.

For a remote terminal CONNECTED to a network device through a relay terminal, if the remote terminal is in an rrc_connected state and interested in an MBS service, the remote terminal may perform an on-demand SI request to the network device through an end-to-end RRC signaling (such as a disjunctionsbequest), request to acquire SIB21, which is used to determine a mapping relationship between the MBS service and a frequency point.

The remote terminal obtains terminal capability indication information of the relay terminal through a direct communication interface. The terminal capability indication information of the relay terminal at least comprises an MBS-related capability indication, and the MBS-related capability may be specifically represented by one or more of the following contents:

the relay terminal supports MBS service reception;

the relay terminal supports MBS broadcast service reception;

the relay terminal supports MBS multicast service receiving (further can also carry supported multicast service identification information, such as TMGI);

the relay terminal supports G-RNTI/G-CS-RNTI;

the relay terminal supports MCCH and/or MTCH reception.

Step S12: the network device sends SIB21 to the remote terminal through end-to-end RRC signaling.

Optionally, the network device receives the system information request message sent by the remote terminal in step S11, and may send SIB21 to the remote terminal through end-to-end RRC signaling.

Step S13: the remote terminal determines the MBS frequency point of interest

Optionally, the remote terminal determines the interested MBS frequency point according to SIB21 or the high-layer indication information.

Step S14: remote terminal indicates MBS interface to network equipment

Taking the 5G system as an example, the end-to-end RRC signaling may employ an mbinterest indication message. MBS Interest Indication at least needs to carry indication information:

Whether MBS service needs to be forwarded through a relay terminal or not;

a relay terminal identifier for forwarding MBS service proposed by a remote terminal;

the remote terminal suggested MBS service forwards the used PC5 link mark; wherein, the PC5 link identifier can be a combination of a direct communication interface target address, a source address and a target address or a combination of a source address, a target address and an LCID;

the remote terminal suggests a transmission mode used by the direct communication interface; the transmission mode of the direct communication interface refers to unicast of the direct communication interface, multicast of the direct communication interface or broadcast of the direct communication interface.

Step S15: determining relay terminals

The network device receives MBS Interest Indication sent by the remote terminal in step S14, if the remote terminal is accessed to the network device through a plurality of relay terminals, the network device needs to further determine the relay terminal for forwarding the MBS service, and one or a combination of the following information needs to be considered when determining the relay terminal for forwarding the MBS service:

the maximum number of MRBs supported by the relay terminal;

load information of the relay terminal (such as the number of remote UEs accessing the relay terminal, whether Uu interface of the relay terminal is congested, etc.);

The moving speed of the relay terminal;

and relaying the electric quantity of the terminal.

Step S16: first configuration information transmission

Wherein the first configuration information may include, but is not limited to, one or more of the following configuration information:

identification information of the relay terminal used for MBS service transmission;

MBS service identities (such as TMGIs);

PDCP configuration information corresponding to an end-to-end MRB;

the end-to-end MRB is used for configuring information of RLC/MAC/PHY corresponding to a direct communication interface;

the remote terminal receives the SL DRX configuration information used at the direct communication interface.

Wherein, after receiving the first configuration information, the remote terminal may perform one or more of the following operations:

establishing an end-to-end PDCP entity corresponding to the corresponding MRB;

establishing a direct communication interface RLC entity corresponding to the MRB;

the TMGI corresponding to the MRB is indicated to a high layer;

if the SDAP entity corresponding to the TMGI is not established, establishing the corresponding SDAP entity.

Step S17: second configuration information transmission

The first configuration information and the second configuration information are not in sequence.

The second configuration information may include, but is not limited to, one or more of the following configuration information:

MBS service identities (such as TMGIs);

mapping relation between RLC channel corresponding to Uu interface MRB and direct communication interface PC5 RLC channel.

A transmission mode used by the relay terminal when the MBS service is forwarded by the direct communication interface;

SL DRX used by relay terminal when MBS service is sent by direct communication interface.

After receiving the second configuration information, the relay terminal may perform one or more of the following operations:

establishing an end-to-end PDCP entity corresponding to the corresponding MRB;

and storing the mapping relation between the Uu interface RLC channel and the PC5 RLC channel for end-to-end MBS service transmission.

Step S18: the relay terminal receives MBS service

The relay terminal can adopt the existing flow to receive MBS service, but after the relay terminal carries out RLC layer processing on MBS service, mapping between Uu interface RLC channel and PC5 interface RLC channel is directly executed, and data is sent to the far-end terminal through the determined PC5 RLC channel.

Step S19: the relay terminal forwards MBS business to the far-end terminal

Specifically, the relay terminal forwards the MBS service according to the transmission mode suggested in step S14.

Exemplary embodiment 2, which illustrates a receiving method of Remote UE MBS service (Remote terminal MBS multicast service):

step S20: the remote terminal performs group joining process

Alternatively, this step may be done using an end-to-end signaling procedure, completely multiplexing the existing mechanism.

Step S21: the remote terminal sends the second indication information to the network equipment through the end-to-end RRC signaling

Optionally, the remote terminal obtains the terminal capability indication information of the relay terminal through the direct communication interface. The terminal capability indication information of the relay terminal at least comprises an MBS-related capability indication, and the MBS-related capability may be specifically represented by one or more of the following contents:

the relay terminal supports MBS service reception;

the relay terminal supports MBS broadcast service reception;

the relay terminal supports G-RNTI/G-CS-RNTI;

the relay terminal supports MCCH and/or MTCH reception.

Step 22: the network device sends SIB21 to the remote terminal through end-to-end RRC signaling.

The network device receives the system information request message sent by the remote terminal in step S21, and may send SIB21 to the remote terminal through end-to-end RRC signaling.

Step 23: the remote terminal determines the MBS frequency point of interest.

Step S24: remote terminal indicates MBS interface to network equipment

whether MBS service needs to be forwarded through a relay terminal or not;

Step S25: determining relay terminals

The network device receives MBS Interest Indication sent by the remote terminal in step S24, if the remote terminal is accessed to the network device through a plurality of relay terminals, the network device needs to further determine the relay terminal for MBS service forwarding, and one or a combination of the following information needs to be considered when determining the relay terminal for MBS service forwarding:

the maximum number of MRBs supported by the relay terminal;

the moving speed of the relay terminal;

and relaying the electric quantity of the terminal.

Step S26: first configuration information transmission

The first configuration information may include, but is not limited to, one or more of the following configuration information:

MBS service identities (such as TMGIs);

PDCP configuration information corresponding to an end-to-end MRB;

After receiving the first configuration information, the remote terminal performs one or more of the following operations:

establishing an end-to-end PDCP entity corresponding to the corresponding MRB;

Suggesting a direct communication interface RLC entity corresponding to the MRB;

the TMGI corresponding to the MRB is indicated to a high layer;

Step S27: and sending the second configuration information.

MBS service identities (such as TMGIs);

After receiving the second configuration information, the relay terminal performs one or more of the following operations:

establishing an end-to-end PDCP entity corresponding to the corresponding MRB;

Step S28: the relay terminal receives the MBS service.

Step S29: the relay terminal forwards MBS business to the far-end terminal

And the relay terminal forwards the MBS service according to the transmission mode determined in the step S24.

Example embodiment 3 illustrates a method of replacing a relay terminal performing MBS forwarding in a Multi-path multipath scenario:

step S31: the remote terminal indicates MBS interfaces to the network device.

whether MBS service needs to be forwarded through a relay terminal or not;

Step S32: and determining the relay terminal.

The network device receives MBS Interest Indication sent by the remote terminal in step S31, if the remote terminal is accessed to the network device through a plurality of relay terminals, the network device needs to further determine the relay terminal for MBS service forwarding, and one or a combination of the following information needs to be considered when determining the relay terminal for MBS service forwarding:

the maximum number of MRBs supported by the relay terminal;

the moving speed of the relay terminal;

and relaying the electric quantity of the terminal.

Step S33: and sending the first configuration information.

MBS service identities (such as TMGIs);

PDCP configuration information corresponding to an end-to-end MRB;

Establishing an end-to-end PDCP entity corresponding to the corresponding MRB;

the TMGI corresponding to the MRB is indicated to a high layer;

Step S34: and sending the second configuration information.

MBS service identities (such as TMGIs);

establishing an end-to-end PDCP entity corresponding to the corresponding MRB;

Step S35: the relay terminal receives the MBS service.

Step S36: the relay terminal forwards the MBS service to the remote terminal.

And the relay terminal forwards the MBS service according to the transmission mode determined in the step S31.

Step SS37: relay terminal for judging need of replacing and forwarding MBS service

If the remote terminal cannot receive the MBS service through the relay terminal configured by the network device, one of the following operations may be performed:

the remote terminal considers RLF and triggers the remote terminal to perform relay and/or cell reselection.

If the remote terminal has other links (such as direct link or other relay link) with the network device, the remote terminal can report to the network device, and trigger the network device to reconfigure the relay terminal for MBS forwarding.

If the second mode is selected, the following step S38 is continued.

Step S38: the remote terminal sends the second indication information to the network device.

The second indication information is used for indicating the network device to replace the relay terminal for forwarding the MBS service, and the indication information may be multiplexed with MBS Interest Indication in step S31 or new signaling is introduced.

According to a fourth aspect of the present application, there is provided a first terminal, as shown in fig. 10, the first terminal 100 including:

a first obtaining module 101, configured to obtain first configuration information, where the first configuration information includes: the first terminal receives end-to-end configuration information required by MBS service and/or direct communication interface configuration information required by MBS service;

and a receiving module 102 configured to receive the MBS service from the second terminal based on the first configuration information, wherein the second terminal is a relay terminal or a terminal supporting forwarding of the MBS service.

In one embodiment, the first obtaining module 101 is specifically configured to receive the first configuration information sent by the network device.

In an embodiment, the first obtaining module 101 is specifically configured to receive end-to-end configuration information required by the first terminal to receive the MBS service sent by the network device, and/or receive direct communication interface configuration information required by the first terminal to receive the MBS service sent by the second terminal through the direct communication interface.

In one embodiment, the first obtaining module 101 is specifically configured to send first indication information to the network device, where the first indication information includes an MBS service of interest or a frequency point of the MBS service of interest of the first terminal; the network device receives first configuration information determined based on the first indication information.

In one embodiment, the first indication information further includes at least one of: MBS business needs to be forwarded through the second terminal; forwarding the identification of the candidate second terminal of the MBS service; forwarding the identification of the candidate direct communication PC5 link of the MBS service; the first terminal suggests a transmission mode used when the direct communication interface MBS service is forwarded.

In one embodiment, the first configuration information includes at least one of: forwarding identification information of a second terminal of the MBS service; MBS service identification; PDCP layer configuration information corresponding to an end-to-end MRB between a first terminal and a network device; end-to-end MRB between the first terminal and the second terminal controls the configuration information of the RLC layer in the radio resource corresponding to the direct communication interface; the end-to-end MRB between the first terminal and the second terminal is used for controlling MAC layer configuration information in the medium access corresponding to the direct communication interface; end-to-end MRB between the first terminal and the second terminal is in the physical PHY layer configuration information corresponding to the direct communication interface; the first terminal receives a SL DRX configuration at a direct communication interface used by MBS services at the direct communication interface.

In one embodiment, the first terminal 100 further comprises a first execution module configured to, after acquiring the first configuration information, execute at least one of the following operations based on the first configuration information: establishing an end-to-end PDCP entity corresponding to the MRB; an RLC entity of a direct communication interface corresponding to the MRB is established; indicating the MBS service identification corresponding to the MRB to a high-level; and under the condition that the SDAP entity corresponding to the MBS service identifier is not established, establishing the SDAP entity corresponding to the MBS service identifier.

In an embodiment, the first terminal 100 further includes a second execution module configured to trigger the first terminal to perform relay and/or cell reselection when the first terminal cannot receive the MBS service from the second terminal; or triggering the first terminal to send second indication information to the network equipment, wherein the second indication information is used for indicating that the first terminal cannot receive MBS service through the second terminal and/or the identification of the MBS service cannot be received.

It should be noted that, the above first terminal provided in the present application can correspondingly implement all the method steps implemented by the remote terminal in the above method embodiment, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiment in this embodiment are omitted.

According to a fifth aspect of the present application, there is provided a second terminal, which is a relay terminal or a terminal supporting MBS service forwarding, as shown in fig. 11, the second terminal 110 includes:

a second obtaining module 111 configured to obtain second configuration information, the second configuration information including: the second terminal carries out direct communication interface configuration information required by MBS service forwarding;

and a forwarding module 112 configured to forward the MBS service data to the first terminal based on the second configuration information.

In one embodiment, the second obtaining module 111 is specifically configured to receive the second configuration information sent by the network device.

In one embodiment, the second terminal 110 further includes: a configuration information receiving module configured to obtain direct communication interface configuration information required for receiving the MBS service by the first terminal from the network device; and the configuration information forwarding module is used for forwarding the direct communication interface configuration information required by the first terminal for receiving the MBS service to the first terminal through the direct communication interface between the first terminal and the second terminal.

In one embodiment, the second obtaining module 111 is specifically configured to receive direct communication interface configuration information required for MBS service forwarding by the second terminal sent by the first terminal through the direct communication interface.

In one embodiment, the second configuration information includes at least one of: MBS service identification; mapping relation between the RLC channel corresponding to MRB of Uu interface and the RLC channel of direct communication interface; end-to-end MRB between the first terminal and the second terminal is corresponding to RLC layer configuration information of a direct communication interface; the end-to-end MRB between the first terminal and the second terminal is used for controlling MAC layer configuration information in the medium access corresponding to the direct communication interface; end-to-end MRB between the first terminal and the second terminal is in the physical PHY layer configuration information corresponding to the direct communication interface; the second terminal transmits the transmission mode of MBS business in the direct communication interface; the second terminal forwards the direct communication interface SL DRX configuration used by MBS service at the direct communication interface.

In one embodiment, the second terminal 110 further comprises a third execution module configured to, after obtaining the second configuration information, execute at least one of the following operations based on the second configuration information: an RLC entity of a direct communication interface corresponding to the MRB is established; and storing the mapping relation between the RLC channel corresponding to the Uu interface by the MRB and the RLC channel corresponding to the direct communication interface by the MRB.

In one embodiment, the forwarding module 112 is specifically configured to forward the MBS service to the first terminal on the RLC channel corresponding to the direct communication interface based on the mapping relationship after the RLC channel corresponding to the Uu interface receives the MBS service sent by the network device.

It should be noted that, the above second terminal provided in the present application can correspondingly implement all the method steps implemented by the relay terminal in the above method embodiment, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in the present embodiment are omitted herein.

According to a sixth aspect of the present application, there is provided a network device, as shown in fig. 12, the network device 120 comprising:

a first sending module 121 configured to send first configuration information to the first terminal, where the first configuration information includes: the first terminal receives end-to-end configuration information required by MBS service and/or direct communication interface configuration information required by MBS service;

A second sending module 122 configured to send second configuration information to the second terminal, the second configuration information comprising: the second terminal carries out direct communication interface configuration information required by MBS service forwarding, and the second terminal is a relay terminal or a terminal supporting MBS service forwarding.

In one embodiment, the first sending module 121 is specifically configured to send, to the first terminal, end-to-end configuration information required by the first terminal to receive the MBS service; and/or sending the direct communication interface configuration information required by the first terminal to receive the MBS service to the second terminal, so that the second terminal forwards the direct communication interface configuration information required by the first terminal to receive the MBS service to the first terminal through the direct communication interface.

In one embodiment, the network device 120 further comprises: the indication information receiving module is configured to receive first indication information sent by the first terminal, wherein the first indication information comprises MBS service of interest or frequency points of MBS service of interest of the first terminal; and a configuration information determining module configured to determine the first configuration information and/or the second configuration information based on the first indication information.

In one embodiment, the first indication information includes at least one of: MBS business needs to be forwarded through the second terminal; forwarding the identification of the candidate second terminal of the MBS service; forwarding the identification of the candidate direct communication PC5 link of the MBS service; the second terminal forwards the transmission mode of the MBS service at the direct communication interface.

In one embodiment, the network device 120 further comprises: and a terminal determining module configured to determine the second terminal based on the first indication information.

In one embodiment, the terminal determining module is specifically configured to determine the candidate second terminal as the second terminal in the case where there is only one candidate second terminal; in the case where there are a plurality of candidate second terminals, the second terminals are determined based on at least one of the following information: the maximum number of MRBs supported by the second terminal, load information of the second terminal, moving speed of the second terminal or electric quantity of the second terminal.

In one embodiment, the network device 120 further comprises: and the redetermining module is configured to redetermine the second terminal based on the second indication information when the second indication information of the first terminal is received, wherein the second indication information is used for indicating that the first terminal cannot receive the MBS service and/or cannot receive the identification of the MBS service through the second terminal.

It should be noted that, the network device provided in the present application can correspondingly implement all the method steps implemented by the network device in the method embodiment, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in the present embodiment are omitted.

According to a seventh aspect of the present application, there is provided a first terminal, as shown in fig. 13, including:

a memory 131 for storing a computer program;

a transceiver 132 for transceiving data under the control of the processor;

a processor 133 for reading the computer program in the memory and performing the following operations: acquiring first configuration information, wherein the first configuration information comprises: the first terminal receives end-to-end configuration information required by MBS service and/or direct communication interface configuration information required by MBS service; and receiving the MBS service from the second terminal based on the first configuration information, wherein the second terminal is a relay terminal or a terminal supporting MBS service forwarding.

In one embodiment, obtaining the first configuration information includes: and receiving the first configuration information sent by the network equipment.

In one embodiment, obtaining the first configuration information includes: and receiving the end-to-end configuration information required by the MBS service received by the first terminal sent by the network equipment and/or receiving the direct communication interface configuration information required by the MBS service received by the first terminal sent by the second terminal through the direct communication interface.

In one embodiment, obtaining the first configuration information includes:

Sending first indication information to network equipment, wherein the first indication information comprises MBS service of interest of a first terminal or frequency points of MBS service of interest;

the network device receives first configuration information determined based on the first indication information.

MBS business needs to be forwarded through the second terminal;

forwarding identification information of a second terminal of the MBS service;

MBS service identification;

establishing an end-to-end PDCP entity corresponding to the MRB;

In one embodiment, if the first terminal cannot receive the MBS service from the second terminal, the processor 133 is further configured to:

Triggering the first terminal to send second indication information to the network equipment, wherein the second indication information is used for indicating that the first terminal cannot receive MBS service through the second terminal and/or the identification of the MBS service cannot be received.

It should be noted that, the above first terminal provided in the present application can implement all the method steps implemented by the remote terminal in the above method embodiment, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in the present embodiment are omitted herein.

According to an eighth aspect of the present application, there is provided a second terminal, which is a relay terminal or a terminal supporting MBS service forwarding, as shown in fig. 14, including:

a memory 141 for storing a computer program;

a transceiver 142 for transceiving data under the control of the processor;

a processor 143 for reading the computer program in the memory and performing the following operations: acquiring second configuration information, wherein the second configuration information comprises: the second terminal carries out direct communication interface configuration information required by MBS service forwarding; and forwarding the MBS service data to the first terminal based on the second configuration information.

In one embodiment, obtaining the second configuration information includes: and receiving second configuration information sent by the network equipment.

In one embodiment, the processor 143 is further configured to perform the following:

In one embodiment, obtaining the second configuration information includes: and receiving direct communication interface configuration information required by MBS service forwarding of a second terminal sent by the first terminal through the direct communication interface.

MBS service identification;

end-to-end MRB between the first terminal and the second terminal is in the physical PHY layer configuration information corresponding to the direct communication interface; the second terminal transmits the transmission mode of MBS business in the direct communication interface;

In one embodiment, forwarding MBS service data to a first terminal includes:

after the RLC channel corresponding to the Uu interface receives the MBS service sent by the network device, forwarding the MBS service to the first terminal on the RLC channel corresponding to the direct communication interface based on the mapping relationship. It should be noted that, the above second terminal provided in the present application can implement all the method steps implemented by the relay terminal in the above method embodiment, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in the present embodiment are omitted herein.

According to a ninth aspect of the present application, there is provided a network device, as shown in fig. 15, comprising:

a memory 151 for storing a computer program;

a transceiver 152 for transceiving data under the control of the processor;

a processor 153 for reading the computer program in the memory and performing the following operations: transmitting first configuration information to a first terminal, wherein the first configuration information comprises: the first terminal receives end-to-end configuration information required by MBS service and/or direct communication interface configuration information required by MBS service; transmitting second configuration information to the second terminal, wherein the second configuration information comprises: the second terminal carries out direct communication interface configuration information required by MBS service forwarding, and the second terminal is a relay terminal or a terminal supporting MBS service forwarding.

In one embodiment, transmitting the first configuration information to the first terminal includes:

and sending the direct communication interface configuration information required by the first terminal for receiving the MBS service to the second terminal, so that the second terminal forwards the direct communication interface configuration information required by the first terminal for receiving the MBS service to the first terminal through the direct communication interface.

In one embodiment, before sending the first configuration information to the first terminal, the processor 153 further performs the following operations:

In one embodiment, the first indication information includes at least one of:

MBS business needs to be forwarded through the second terminal;

In one embodiment, the processor 153 is further configured to perform the following operations: the second terminal is determined based on the first indication information.

In one embodiment, determining the second terminal based on the first indication information includes:

forwarding identification information of a second terminal of the MBS service;

MBS service identification;

In one embodiment, the processor 153 is further configured to perform the following operations:

It should be noted that, the network device provided in the present application can implement all the method steps implemented by the network device in the method embodiment, and can achieve the same technical effects, and the same parts and beneficial effects as those of the method embodiment in the present embodiment are not described in detail herein. According to a tenth aspect of the present application, there is provided a processor-readable storage medium storing a computer program for causing a processor to execute a transmission method of a multicast broadcast MBS service.

It should be noted that, in the embodiment of the present application, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice. 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 integrated units may be implemented in hardware or in software functional units.

The integrated units described above, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all or part of the technical solution contributing to the prior art or in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: a U-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.

On the relay terminal side, the embodiment of the application provides a processor readable storage medium, where the processor readable storage medium stores a computer program, where the computer program is configured to enable a processor to implement all the method steps implemented by the relay terminal in the method embodiment and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in the embodiment are omitted herein.

On the remote terminal side, the embodiment of the application provides a processor readable storage medium, where the processor readable storage medium stores a computer program, where the computer program is configured to enable a processor to implement all the method steps implemented on the remote terminal side in the method embodiment and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in the embodiment are omitted herein. Among other things, processor-readable storage media can be any available medium or data storage device that can be accessed by a processor, including but not limited to magnetic storage (e.g., floppy disks, hard disks, tapes, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor storage (e.g., ROM, EPROM, EEPROM, nonvolatile storage (NAND FLASH), solid State Disk (SSD)), etc.

On the relay terminal side, an embodiment of the present application further provides a computer program product including instructions, where the computer program is stored in a storage medium, and at least one processor may read the computer program from the storage medium, where when the at least one processor executes the computer program, the at least one processor may implement all method steps implemented by the relay terminal in the foregoing method embodiment, and may achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment are omitted herein.

On the remote terminal side, an embodiment of the present application further provides a computer program product including instructions, where the computer program is stored in a storage medium, and at least one processor may read the computer program from the storage medium, where when the at least one processor executes the computer program, the at least one processor may implement all the method steps implemented by the remote terminal in the foregoing method embodiment, and may achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiment are omitted herein.

On the device side of the network, an embodiment of the present application further provides a computer program product including instructions, where the computer program is stored in a storage medium, and when the at least one processor executes the computer program, the at least one processor may implement all the method steps implemented by the network device in the method embodiment, and the same technical effects may be achieved, and detailed descriptions of the same parts and beneficial effects as those in the method embodiment are omitted herein.

On the network device side, an embodiment of the present application further provides a computer program product including instructions, where the computer program is stored in a storage medium, and when the at least one processor executes the computer program, the at least one processor may implement all the method steps implemented by the network device in the foregoing method embodiment, and the same technical effects may be achieved, and detailed descriptions of the same parts and beneficial effects as those in the method embodiment are omitted herein.

The embodiment of the application also provides a communication system which comprises the relay terminal, the remote terminal and the network equipment. The relay terminal can execute all the method steps executed by the relay terminal side in the method embodiment, and the same technical effects can be achieved. The remote terminal can execute all the method steps executed by the remote terminal side in the method embodiment, and the same technical effects can be achieved. The network device can execute all the method steps executed by the network device side in the method embodiment, and the same technical effects can be achieved. The same parts and advantageous effects as those of the method embodiment in this embodiment will not be described in detail herein.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to signaling interactive schematic diagrams and/or block diagrams of methods, apparatuses, and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the signaling diagram and/or block diagram, and combinations of flows and/or blocks in the signaling diagram and/or block diagram, may be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the signaling interaction diagram flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the signaling interaction diagram flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the signaling diagram flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. A method for transmitting multicast broadcast MBS service, applied to a first terminal, the method comprising:

2. The method of claim 1, wherein the obtaining the first configuration information comprises: and receiving the first configuration information sent by the network equipment.

3. The method of claim 1, wherein the obtaining the first configuration information comprises: and receiving end-to-end configuration information required by the first terminal for receiving the MBS service and transmitted by the network equipment, and/or receiving direct communication interface configuration information required by the first terminal for receiving the MBS service and transmitted by the second terminal through a direct communication interface.

4. The method of claim 1, wherein the obtaining the first configuration information comprises:

5. The method of claim 4, wherein the first indication information further comprises at least one of:

the MBS service needs to be forwarded through a second terminal;

6. The method of any of claims 1 to 4, wherein the first configuration information comprises at least one of:

forwarding identification information of a second terminal of the MBS service;

MBS service identification;

7. The method of claim 1, wherein after the obtaining the first configuration information, at least one of the following is performed based on the first configuration information:

establishing an end-to-end PDCP entity corresponding to the MRB;

8. The method of claim 1, wherein if the first terminal cannot receive MBS service from the second terminal, the method further comprises:

9. A transmission method of multicast broadcast MBS service, applied to a second terminal, where the second terminal is a relay terminal or a terminal supporting MBS service forwarding, the method comprising:

10. The method of claim 9, wherein the obtaining the second configuration information comprises: and receiving the second configuration information sent by the network equipment.

11. The method as recited in claim 9, further comprising:

12. The method of claim 9, wherein the obtaining the second configuration information comprises: and receiving direct communication interface configuration information required by MBS service forwarding of the second terminal sent by the first terminal through a direct communication interface.

13. The method according to any of claims 9-12, wherein the second configuration information comprises at least one of:

MBS service identification;

14. The method of claim 9, wherein after obtaining the second configuration information, performing at least one of the following based on the second configuration information:

15. The method of claim 14, wherein forwarding MBS service data to the first terminal comprises:

after receiving MBS service sent by network equipment, the RLC channel corresponding to Uu interface forwards the MBS service to the first terminal on the RLC channel corresponding to direct communication interface based on the mapping relation.

16. A method for transmitting multicast broadcast MBS service, applied to a network device, the method comprising:

17. The method of claim 16, wherein the sending the first configuration information to the first terminal comprises:

18. The method of claim 16, wherein prior to transmitting the first configuration information to the first terminal, the method further comprises:

19. The method of claim 18, wherein the first indication information comprises at least one of:

the MBS service needs to be forwarded through a second terminal;

20. The method of claim 19, wherein the method further comprises: and determining the second terminal based on the first indication information.

21. The method of claim 20, wherein the determining the second terminal based on the first indication information comprises:

22. The method of any of claims 16-21, wherein the first configuration information comprises at least one of:

forwarding identification information of a second terminal of the MBS service;

MBS service identification;

23. The method of any of claims 16 to 21, wherein the second configuration information comprises at least one of:

MBS service identification;

24. The method as recited in claim 16, further comprising:

25. A first terminal, comprising:

26. A second terminal, wherein the second terminal is a relay terminal or a terminal supporting MBS service forwarding, comprising:

27. A network device, comprising:

28. A first terminal, comprising:

a memory for storing a computer program;

a transceiver for transceiving data under the control of the processor;

29. The first terminal of claim 28, wherein the obtaining the first configuration information includes: and receiving the first configuration information sent by the network equipment.

30. The first terminal of claim 28, wherein the obtaining the first configuration information includes: and receiving end-to-end configuration information required by the first terminal for receiving the MBS service and transmitted by the network equipment, and/or receiving direct communication interface configuration information required by the first terminal for receiving the MBS service and transmitted by the second terminal through a direct communication interface.

31. The first terminal of claim 28, wherein the obtaining the first configuration information includes: sending first indication information to network equipment, wherein the first indication information comprises MBS service of interest or frequency points of MBS service of interest of the first terminal; first configuration information determined by the network device based on the first indication information is received.

32. The first terminal of claim 31, wherein the first indication information further comprises at least one of: the MBS service needs to be forwarded through a second terminal; forwarding the identification of the candidate second terminal of the MBS service; forwarding the identification of the candidate direct communication PC5 link of the MBS service; the first terminal suggests a transmission mode used when the direct communication interface MBS service is forwarded.

33. The first terminal according to claims 28-31, wherein the first configuration information comprises at least one of: forwarding identification information of a second terminal of the MBS service; MBS service identification; PDCP layer configuration information corresponding to an end-to-end MRB between the first terminal and a network device; end-to-end MRB between the first terminal and the second terminal controls RLC layer configuration information in a radio resource control corresponding to a direct communication interface; the end-to-end MRB between the first terminal and the second terminal is used for controlling MAC layer configuration information in a medium access corresponding to a direct communication interface; end-to-end MRB between the first terminal and the second terminal is configured with information of a physical PHY layer corresponding to a direct communication interface; the first terminal receives the SL DRX configuration at a direct communication interface used by MBS service at the direct communication interface.

34. The first terminal of claim 28, wherein the processor, after obtaining the first configuration information, performs at least one of the following based on the first configuration information: establishing an end-to-end PDCP entity corresponding to the MRB; an RLC entity of a direct communication interface corresponding to the MRB is established; indicating the MBS service identification corresponding to the MRB to a high layer; and under the condition that the SDAP entity corresponding to the MBS service identifier is not established, establishing the SDAP entity corresponding to the MBS service identifier.

35. A second terminal, wherein the second terminal is a relay terminal or a terminal supporting MBS service forwarding, comprising:

a memory for storing a computer program;

a transceiver for transceiving data under the control of the processor;

36. The second terminal of claim 35, wherein the obtaining the second configuration information includes: and receiving the second configuration information sent by the network equipment.

37. The second terminal of claim 35, wherein the processor further performs the following: acquiring direct communication interface configuration information required by the first terminal for receiving MBS service from network equipment; and forwarding direct communication interface configuration information required by the first terminal for receiving MBS service to the first terminal through a direct communication interface between the first terminal and the second terminal.

38. The second terminal of claim 35, wherein the obtaining the second configuration information includes: and receiving direct communication interface configuration information required by MBS service forwarding of the second terminal sent by the first terminal through a direct communication interface.

39. The second terminal according to claims 35-38, wherein the second configuration information comprises at least one of: MBS service identification; mapping relation between the RLC channel corresponding to MRB of Uu interface and the RLC channel of direct communication interface; end-to-end MRB between the first terminal and the second terminal is corresponding to RLC layer configuration information of a direct communication interface; the end-to-end MRB between the first terminal and the second terminal is used for controlling MAC layer configuration information in a medium access corresponding to a direct communication interface; end-to-end MRB between the first terminal and the second terminal is configured with information of a physical PHY layer corresponding to a direct communication interface; the second terminal forwards the transmission mode of MBS business at the direct communication interface; and the second terminal forwards the direct communication interface SL DRX configuration used by the MBS service on the direct communication interface.

40. The second terminal of claim 35, wherein the processor, after obtaining the second configuration information, performs at least one of the following operations based on the second configuration information: an RLC entity of a direct communication interface corresponding to the MRB is established; and storing the mapping relation between the RLC channel corresponding to the Uu interface by the MRB and the RLC channel corresponding to the direct communication interface by the MRB.

41. The second terminal as claimed in claim 40, wherein the forwarding the MBS service data to the first terminal comprises: after receiving MBS service sent by network equipment, the RLC channel corresponding to Uu interface forwards the MBS service to the first terminal on the RLC channel corresponding to direct communication interface based on the mapping relation.

42. A network device, comprising:

a memory for storing a computer program;

a transceiver for transceiving data under the control of the processor;

43. The network device of claim 42, wherein the sending the first configuration information to the first terminal comprises: transmitting end-to-end configuration information required by the first terminal for receiving MBS service to the first terminal; and/or sending the direct communication interface configuration information required by the first terminal to receive the MBS service to the second terminal, so that the second terminal forwards the direct communication interface configuration information required by the first terminal to receive the MBS service to the first terminal through a direct communication interface.

44. The network device of claim 42, wherein the processor further performs the following before sending the first configuration information to the first terminal: receiving first indication information sent by a first terminal, wherein the first indication information comprises MBS service of interest or frequency points of MBS service of interest of the first terminal; and determining first configuration information and/or second configuration information based on the first indication information.

45. The network device of claim 44, wherein the first indication information comprises at least one of: the MBS service needs to be forwarded through a second terminal; forwarding the identification of the candidate second terminal of the MBS service; forwarding the identification of the candidate direct communication PC5 link of the MBS service; and the second terminal forwards the transmission mode of the MBS service at the direct communication interface.

46. The network device of claim 45, wherein the processor further performs the following: and determining the second terminal based on the first indication information.

47. The network device of claim 46, wherein the determining the second terminal based on the first indication information comprises: in the case where there is only one candidate second terminal, determining the candidate second terminal as the second terminal; in the case where there are a plurality of candidate second terminals, the second terminals are determined based on at least one of the following information: the maximum number of MRBs supported by the second terminal, load information of the second terminal, moving speed of the second terminal or electric quantity of the second terminal.

48. The network device of any one of claims 42-47, wherein the first configuration information includes at least one of: forwarding identification information of a second terminal of the MBS service; MBS service identification; PDCP layer configuration information corresponding to an end-to-end MRB between the first terminal and a network device; end-to-end MRB between the first terminal and the second terminal controls RLC layer configuration information in a radio resource control corresponding to a direct communication interface; the end-to-end MRB between the first terminal and the second terminal is used for controlling MAC layer configuration information in a medium access corresponding to a direct communication interface; end-to-end MRB between the first terminal and the second terminal is configured with information of a physical PHY layer corresponding to a direct communication interface; the first terminal receives the SL DRX configuration at a direct communication interface used by MBS service at the direct communication interface.

49. The network device of any of claims 42-47, wherein the second configuration information includes at least one of: MBS service identification; mapping relation between the RLC channel corresponding to MRB of Uu interface and the RLC channel of direct communication interface; end-to-end MRB between the first terminal and the second terminal is corresponding to RLC layer configuration information of a direct communication interface; the end-to-end MRB between the first terminal and the second terminal is used for controlling MAC layer configuration information in a medium access corresponding to a direct communication interface; end-to-end MRB between the first terminal and the second terminal is configured with information of a physical PHY layer corresponding to a direct communication interface; the second terminal forwards the transmission mode of MBS business at the direct communication interface; and the second terminal forwards the direct communication interface SL DRX configuration used by the MBS service on the direct communication interface.

50. A processor-readable storage medium, wherein the processor-readable storage medium stores a computer program for causing a processor to perform the transmission method of the multicast broadcast MBS service of any one of claims 1 to 8, or the transmission method of the multicast broadcast MBS service of any one of claims 9 to 15, or the transmission method of the multicast broadcast MBS service of any one of claims 16 to 24.