CN113840242B - Method and equipment for transmitting multicast broadcast service - Google Patents

Abstract

A transmission method and equipment of multicast broadcast service, the method includes the terminal station sends request information aiming at target MBS to the network; the terminal receives indication information of a transmission mode of the target MBS sent by a network and receives the target MBS, wherein the transmission mode comprises point-to-multipoint PTM and/or point-to-point PTP. The embodiment of the invention provides an implementation scheme of MBS service initiated by a terminal, which can improve the flexibility of MBS service transmission and improve the use experience of a user on the MBS service.

Description

Transmission method and equipment for multicast broadcast service

technical field

The present invention relates to the technical field of mobile communication, in particular to a method and equipment for transmitting Multicast and Broadcast Services (MBS).

Background technique

MBS is a technology for transmitting data from one data source to multiple target terminals, which realizes the sharing of network (including core network and access network) resources and improves the utilization of network resources, especially air interface resources.

Taking the Multimedia Broadcast Multicast Service (MBMS) in the LTE system as an example, the MBMS service includes a single frequency network MBMS (MBMS Single Frequency Network, MBSFN) transmission mode and a single cell point to multipoint (Single Cell Point To Multipoint , SC-PTM) in two ways. In the NR system, MBS services are Point To Point (PTP) and Point To Multipoint (PTM).

As shown in Figure 1, MBSFN broadcasts MBMS services synchronously in an area (multiple cells), which can save frequency resources and improve spectrum utilization. Moreover, the diversity effect brought by the multi-cell co-frequency transmission can solve problems such as blind area coverage, enhance the reliability of reception, and improve coverage. However, SC-PTM is transmitted through a physical downlink shared channel (PDSCH) in a single cell. As shown in FIG. 2 , whether to use the MBSFN transmission mode or the SC-PTM transmission mode is determined by a multi-cell/multicast coordination entity (Multi-cell/multicast Coordination Entity, MCE).

Contents of the invention

At least one embodiment of the present invention provides a multicast broadcast service transmission method and equipment, and provides an implementation scheme for an MBS service initiated by a terminal, which can improve the flexibility of MBS service transmission and improve the user's understanding of the MBS service. Use experience.

According to one aspect of the present invention, at least one embodiment provides a method for transmitting a multicast broadcast service, including:

The terminal sends request information for the target MBS to the network;

The terminal receives the indication information of the transmission mode of the target MBS sent by the network, and receives the target MBS, wherein the transmission mode includes point-to-multipoint PTM and/or point-to-point PTP.

In addition, according to at least one embodiment of the present invention, the step of the terminal sending the request information for the target MBS to the network includes:

When the measured network signal quality meets a pre-configured threshold, the terminal sends request information for the target MBS to the network.

In addition, according to at least one embodiment of the present invention, when the terminal is in an idle state or an inactive state, the request information may be sent through any of the following messages:

Message 1 or Message 3 in the 4-step random access procedure;

Message A in the 2-step random access process;

RRC connection establishment request message;

RRC connection recovery request message;

Non-access stratum NAS message;

When the terminal is in a connected state, the request information is sent through an RRC message.

In addition, according to at least one embodiment of the present invention, the request information includes indication information of the target MBS;

Wherein, the indication information of the target MBS is one or more of the service identification ID of the MBS, the temporary mobile group identity TMGI, or the preamble or RO opportunity corresponding to the target MBS.

In addition, according to at least one embodiment of the present invention, the request information further includes at least one of the following information: a network signal quality measured by the terminal and a geographic location of the terminal.

In addition, according to at least one embodiment of the present invention, the terminal receives the indication information of the transmission mode of the target MBS service sent by the network, and the step of receiving the target MBS includes:

The terminal receives first indication information and/or second indication information from a system message, and receives the target MBS sent by the network according to the first indication information and/or second indication information, wherein the first indication The information is used to indicate that the target MBS is sent through PTM or PTP, and the second indication information is used to indicate the time-frequency resource used when sending the target MBS; or,

The terminal receives the mapping relationship between the user group identifier sent by the network and the target MBS, obtains the resource location of the target MBS by using the user group identifier mapped by the target MBS, and receives the resource location obtained by the network through the PTM method. said target MBS sent; or,

The terminal receives a paging message sent by the network or a system message for instructing the terminal to enter the connected state, and receives the target MBS sent by the network through PTP after entering the connected state.

In addition, according to at least one embodiment of the present invention, the step of receiving the target MBS sent by the network through PTM according to the obtained resource location includes:

The terminal receives the transmission beam and/or time-frequency resource information used by the target MBS sent by the network, and receives the target MBS according to the transmission beam and/or time-frequency resource information.

In addition, according to at least one embodiment of the present invention, after the step of receiving the target MBS, the method further includes:

The terminal sends at least one of the reception quality information of the target MBS, the network signal quality measured by the terminal, and the geographic location of the terminal to the network.

In addition, according to at least one embodiment of the present invention, the method further includes:

The terminal receives the adjustment information of the transmission mode of the target MBS sent by the network, and the adjustment information is used to indicate the adjusted transmission mode;

The terminal adjusts the reception mode of the target MBS service according to the adjustment information of the transmission mode of the target MBS.

In addition, according to at least one embodiment of the present invention, before the step of sending the request information for the target MBS to the network, the method further includes:

The terminal receives the service information of the MBS that the network can provide and/or the broadcasting MBS sent by the network, the service information includes a service ID, a temporary mobile group identifier TMGI, a time-frequency resource location, a reception quality threshold, and an SSB identifier , at least one of the BWP logo;

and / or,

The terminal receives the resource information for requesting the MBS sent by the network broadcast, the resource information includes a bearer message of the request information, a preamble, a random access opportunity RO, and at least one of the preamble and the RO having a mapping relationship with the MBS A sort of.

In addition, according to at least one embodiment of the present invention, the method further includes:

The terminal receives the handover command sent by the target base station, the handover command carries the configuration information of the target cell sending the MBS service that the terminal is interested in or in progress, and the configuration information includes bandwidth part BWP identification information, synchronization signal block At least one of an SSB identifier, a channel state information reference signal CSI-RS identifier, and a received signal quality threshold.

According to another aspect of the present invention, at least one embodiment provides a method for transmitting a multimedia broadcast multicast service (MBS), including:

The network side device receives the request information for the target MBS sent by at least one terminal;

The network side device determines the transmission mode of the target MBS, sends indication information of the target MBS transmission mode, and sends the target MBS service, wherein the transmission mode includes PTM and/or PTP.

In addition, according to at least one embodiment of the present invention, the step of determining the transmission mode of the target MBS by the network side device includes at least one of the following:

When the number of the at least one terminal exceeds the first threshold, determine that the transmission mode of the target MBS is PTM;

When the number of the at least one terminal does not exceed the first threshold, determine that the transmission mode of the target MBS is PTP.

In addition, according to at least one embodiment of the present invention, the step of sending the indication information of the target MBS transmission mode includes at least one of the following:

Send the first indication information and/or the second indication information through a system message, wherein the first indication information is used to indicate that the target MBS is sent by PTM or PTP, and the second indication information is used to indicate that the target MBS is sent by means of PTM or PTP. The time-frequency resource used when the target MBS;

When the transmission mode of the target MBS is PTM, sending the mapping relationship between the group wireless network temporary identifier G-RNTI and the target MBS;

When the target MBS transmission mode is PTP, sending a paging message or a system message for instructing the terminal to enter a connected state to the terminal.

In addition, according to at least one embodiment of the present invention, the method further includes:

When the wireless network of the transmitting group temporarily identifies the mapping relationship between the G-RNTI and the target MBS, the network side device also transmits information about the transmitting beam and/or time-frequency resource used by the target MBS.

In addition, according to at least one embodiment of the present invention, the method further includes:

The network side device receives at least one of the indication information of the target MBS, the reception quality information of the target MBS, the network signal quality measured by the terminal, and the geographic location of the terminal sent by the terminal;

The network side device adjusts the transmission mode of the target MBS, and sends indication information for indicating the adjusted transmission mode to the receiver of the target MBS.

In addition, according to at least one embodiment of the present invention, before the step of receiving the request information for the target MBS sent by at least one terminal, the method further includes:

The network side device broadcasts and sends the service information of the MBS that it can provide and/or the MBS that is being sent, and the service information includes service ID, temporary mobile group identifier TMGI, video resource location, reception quality threshold, SSB identifier, BWP at least one of the identifiers;

and / or,

The network side device sends resource information for requesting the MBS, the resource information includes a bearer message of the request information, a preamble, a random access opportunity RO, and at least one of the preamble and the RO that have a mapping relationship with the MBS .

In addition, according to at least one embodiment of the present invention, the method further includes:

When the network side device is the target base station for the handover of the first terminal, receiving the indication information of the MBS service that the terminal of the first terminal is interested in or in progress sent by the source base station;

When the network side device sends a handover command to the first terminal, the handover command carries the configuration information of the target cell sending the MBS service that the terminal is interested in or in progress, and the configuration information includes the bandwidth part BWP identification information , at least one of a synchronization signal block SSB, an identifier of a channel state information reference signal CSI-RS, and a received signal quality threshold.

According to another aspect of the present invention, at least one embodiment provides a terminal, including:

A sending module, configured to send request information for the target MBS to the network;

The receiving module is configured to receive indication information of the transmission mode of the target MBS sent by the network, and receive the target MBS, wherein the transmission mode includes point-to-multipoint PTM and/or point-to-point PTP.

In addition, according to at least one embodiment of the present invention, the receiving module is also used for:

receiving the first indication information and/or the second indication information from a system message, and receiving the target MBS sent by the network according to the first indication information and/or the second indication information, wherein the first indication information is used for Instructing the target MBS to be sent through PTM or PTP, and the second indication information is used to indicate the time-frequency resource used when sending the target MBS; or,

receiving the mapping relationship between the user group identifier sent by the network and the target MBS, using the user group identifier mapped by the target MBS to obtain the resource location of the target MBS, and receiving the resource location of the target MBS according to the obtained resource location. the above target MBS; or,

Receiving a paging message sent by the network or a system message for instructing the terminal to enter the connected state, and receiving the target MBS sent by the network through PTP after entering the connected state.

According to another aspect of the present invention, at least one embodiment provides a terminal, including a transceiver and a processor, wherein,

The transceiver is configured to send request information for the target MBS to the network; and receive indication information of the transmission mode of the target MBS sent by the network, and receive the target MBS, wherein the transmission mode includes broadcast, group broadcast and unicast.

According to another aspect of the present invention, at least one embodiment provides a terminal, including: a processor, a memory, and a program stored in the memory and operable on the processor, the program is processed by the The steps for implementing the above-mentioned multicast broadcast service MBS transmission method when the device executes.

According to another aspect of the present invention, at least one embodiment provides a network side device, including:

A receiving module, configured to receive request information for a target MBS sent by at least one terminal;

A sending module, configured to determine the transmission mode of the target MBS, send indication information of the target MBS transmission mode, and send the target MBS service, wherein the transmission mode includes PTM and/or PTP.

In addition, according to at least one embodiment of the present invention, the sending module is further configured to determine that the transmission mode of the target MBS is PTM when the number of the at least one terminal exceeds a first threshold; When the number of one terminal does not exceed the first threshold, it is determined that the transmission mode of the target MBS is PTP.

In addition, according to at least one embodiment of the present invention, the sending module is further configured to send the indication information of the target MBS transmission method according to at least one of the following methods:

Send the first indication information and/or the second indication information through a system message, wherein the first indication information is used to indicate that the target MBS is sent by PTM or PTP, and the second indication information is used to indicate that the target MBS is sent by means of PTM or PTP. The time-frequency resource used when the target MBS;

When the transmission mode of the target MBS is PTM, sending the mapping relationship between the group wireless network temporary identifier G-RNTI and the target MBS;

When the target MBS transmission mode is PTP, sending a paging message or a system message for instructing the terminal to enter a connected state to the terminal.

According to another aspect of the present invention, at least one embodiment provides a network side device, including: a processor, a memory, and a program stored in the memory and executable on the processor, the program being executed by the Steps for implementing the above-mentioned multicast broadcast service transmission method when the processor executes.

According to another aspect of the present invention, at least one embodiment provides a computer-readable storage medium, where a program is stored on the computer-readable storage medium, and when the program is executed by a processor, the above method is implemented. step.

Compared with the prior art, in the multicast broadcast service transmission method and equipment provided by the embodiments of the present invention, the terminal requests a certain target MBS from the network, and the network sends the target MBS in response to the terminal's request and indicates that the target MBS In this way, the terminal can receive the expected MBS, and realizes an implementation scheme of the MBS service initiated by the terminal, which can improve the flexibility of sending the MBS service and improve the user experience of the MBS service.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating a preferred embodiment and are not to be considered as limiting the invention. Also throughout the drawings, the same reference numerals are used to designate the same parts. In the attached picture:

FIG. 1 is a schematic diagram of a network architecture of an MBSFN in the prior art;

FIG. 2 is a schematic structural diagram of an MBMS system in the prior art;

FIG. 3 is a schematic diagram of an application scenario according to an embodiment of the present invention;

FIG. 4 is a flow chart when the method for transmitting a multicast broadcast service provided by an embodiment of the present invention is applied to the terminal side;

FIG. 5 is a flow chart when the method for transmitting a multicast broadcast service provided by an embodiment of the present invention is applied to the network side;

FIG. 6 is a schematic structural diagram of a terminal provided by an embodiment of the present invention;

FIG. 7 is another schematic structural diagram of a terminal provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a network side device provided by an embodiment of the present invention;

FIG. 9 is another schematic structural diagram of a network side device provided by an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein, for example, can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus. "And/or" in the specification and claims means at least one of the connected objects.

The technology described herein is not limited to the NR system and the evolution (LTE-Advanced, LTE-A) system of the Long Time Evolution (Long Time Evolution, LTE)/LTE, and can also be used in various wireless communication systems, such as Code Division Multiple Access (Code Division Multiple Access, CDMA), Time Division Multiple Access (Time Division Multiple Access, TDMA), Frequency Division Multiple Access (Frequency Division Multiple Access, FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" are often used interchangeably. The CDMA system can implement radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA) and the like. UTRA includes Wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. A TDMA system implements a radio technology such as Global System for Mobile Communication (GSM). The OFDMA system can realize radios such as UltraMobile Broadband (UltraMobile Broadband, UMB), Evolution-UTRA (Evolution-UTRA, E-UTRA), IEEE 802.21 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. technology. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE and LTE-Advanced (like LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein may be used for the systems and radio technologies mentioned above as well as other systems and radio technologies. However, the following description describes NR systems for example purposes, and NR terminology is used in much of the following description, although the techniques are applicable to applications other than NR system applications as well.

The following description provides examples and does not limit the scope, applicability or configuration set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Referring to FIG. 3 , FIG. 3 shows a block diagram of a wireless communication system to which an embodiment of the present invention is applicable. The wireless communication system includes a terminal 31 and a network device 32 . Wherein, the terminal 31 may also be called a user terminal or user equipment (UE, User Equipment), and the terminal 31 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a personal digital assistant (Personal Digital Assistant, PDA), mobile Internet device (Mobile Internet Device, MID), wearable device (Wearable Device) or vehicle-mounted equipment and other terminal side equipment, it should be noted that, in the embodiment of the present invention, the specific type of terminal 31 is not limited. The network device 32 may be a base station and/or a core network element, wherein the above-mentioned base station may be a base station of 5G and later versions (for example: gNB, 5G NR NB, etc.), or a base station in other communication systems (for example: eNB, WLAN access point, or other access point, etc.), wherein a base station may be referred to as a Node B, an evolved Node B, an access point, a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a basic Service Set (Basic Service Set, BSS), Extended Service Set (Extended Service Set, ESS), Node B, Evolved Node B (eNB), Home Node B, Home Evolved Node B, WLAN access point, WiFi node or all As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present invention, only the base station in the NR system is used as an example, but it does not Specific types of base stations are defined.

The base stations may communicate with terminals 31 under the control of a base station controller, which may be part of a core network or certain base stations in various examples. Some base stations can communicate control information or user data with the core network through the backhaul. In some examples, some of these base stations may communicate with each other directly or indirectly via a backhaul link, which may be a wired or wireless communication link. A wireless communication system may support operation on multiple carriers (waveform signals of different frequencies). A multi-carrier transmitter is capable of transmitting modulated signals on the multiple carriers simultaneously. For example, each communication link may be a multi-carrier signal modulated according to various radio technologies. Each modulated signal may be sent on a different carrier and may carry control information (eg, reference signal, control channel, etc.), overhead information, data, etc.

A base station may communicate wirelessly with terminals 31 via one or more access point antennas. Each base station may provide communication coverage for a respective respective coverage area. The coverage area of an access point may be divided into sectors that constitute only a portion of the coverage area. A wireless communication system may include different types of base stations (eg, macro base stations, micro base stations, or pico base stations). The base stations may also utilize different radio technologies, such as cellular or WLAN radio access technologies. Base stations may be associated with the same or different access networks or operator deployments. Coverage areas of different base stations (including coverage areas of base stations of the same or different types, coverage areas utilizing the same or different radio technologies, or coverage areas belonging to the same or different access networks) may overlap.

A communication link in a wireless communication system may include an uplink for carrying an uplink (Uplink, UL) transmission (for example, from a terminal 31 to a network device 32), or for carrying a downlink (Downlink, DL) transmission. Downlink of transmission (eg, from network device 32 to terminal 31). UL transmissions can also be called reverse link transmissions, and DL transmissions can also be called forward link transmissions. Downlink transmissions may be performed using licensed frequency bands, unlicensed frequency bands, or both. Similarly, uplink transmissions may be performed using licensed frequency bands, unlicensed frequency bands, or both.

In the prior art, broadcast multicast services are usually triggered by the network side, and the broadcast multicast service center (Broadcast Multicast Service Center, BM-SC) decides when to start and terminate multicast data transmission, and in which areas to send multicast data. data. The terminal judges information such as the sending location and period of each MBS service according to the system information broadcast by the network side, and then receives the MBS service that it is interested in. If the MBS service that the terminal is interested in is not being broadcast, the terminal cannot receive the service. Since the MBS service is usually triggered by the network side, the terminal cannot actively trigger the service that the user is interested in, so the network may not be able to provide the terminal with the service that the user is interested in in a timely manner, which limits the promotion and application of the MBS service and affects the user experience. .

In order to solve at least one of the above problems, an embodiment of the present invention provides a method for transmitting a multicast broadcast service. By triggering the MBS service by a terminal, the flexibility of sending the MBS service can be improved, and the user experience of using the MBS service can be improved. .

Referring to FIG. 4, the method for transmitting a multicast broadcast service provided by an embodiment of the present invention, when applied to the terminal side, includes:

Step 41, the terminal sends request information for the target MBS to the network.

Here, the terminal may proactively send request information for a certain MBS (for ease of description, here referred to as a target MBS) to the network for requesting acquisition of the target MBS. For example, if the terminal is interested in the target MBS and wishes to receive the target MBS, the terminal may send the above request information. The request information includes indication information of the target MBS, wherein the indication information of the target MBS may specifically include a service identifier (ID) of the MBS, a temporary mobile group identity (Temporary Mobile Group Identity, TMGI) and the One or more of preambles or random access opportunities (RACHoccasions, RO) corresponding to the target MBS.

Specifically, when the terminal is in an idle state (idle) or an inactive state (inactive), the request information may be sent through any of the following messages:

a) When message 1 or message 3 in the 4-step random access process is sent through the above message 1, a preset preamble (preamble) or a preamble that has a mapping relationship with the target MBS may be used.

b) Message A in the 2-step random access procedure.

c) Radio Resource Control (Radio Resource Control, RRC) connection establishment request message.

d) RRC connection recovery request (RRC Resume) message.

e) Non-Access Stratum (NAS) messages, such as ULInformationTransfer, etc.

When the terminal is in a radio resource control (Radio Resource Control, RRC) connected state, the request information is sent through an RRC message, such as various uplink RRC messages.

In the case where the network side preconfigures the threshold of the network signal quality for receiving MBS, the terminal may send the target MBS in the above step 41 to the network when the measured network signal quality meets the preconfigured threshold. request information.

Optionally, the terminal may also carry at least one of the following information in the request information: the network signal quality measured by the terminal and the geographic location of the terminal (such as GPS information), to provide to the network side as a determination target Reference information of the MBS transmission method. For example, in the case where the network side does not configure the threshold of network signal quality for receiving MBS, the terminal can report the cell signal quality information measured by itself, such as Reference Signal Received Power (Reference Signal Received Power, RSRP), (Reference Signal Received Quality, RSRQ) and Signal-to-Interference and Noise Ratio (SINR), etc. The geographic location may be GPS information, wireless local area network/Bluetooth (WLAN/BT) measurement information, synchronization signal block/CSI reference signal (SSB/CSI-RS) identification, for example, the SSB with the best quality measured by the terminal /CSI-RS identifier or SSB/CSI-RS identifier whose quality exceeds a certain threshold.

Optionally, the terminal may also send the service information of the MBS it is interested in to the network, for example, through a preset preamble or RO, or carry the service ID or TMGI of interest in other messages.

Step 42, the terminal receives the indication information of the transmission mode of the target MBS sent by the network, and receives the target MBS, wherein the transmission mode includes PTM and/or PTP.

Here, the base station determines the transmission mode of the target MBS according to the received request information sent by the terminal, the transmission mode usually includes PTM and/or PTP, and then sends the indication information of the transmission mode of the target MBS to the terminal . The indication information of the transmission mode is used to indicate the transmission mode of the target MBS. If the network has not sent the target MBS when receiving the above request information, the network may further send the target MBS according to the determined transmission mode. In this way, the terminal can receive the indication information of the transmission mode of the target MBS sent by the network, and receive the target MBS according to the indication information of the transmission mode.

Specifically, receiving the information of the transmission indication mode and receiving the target MBS in the above step 42 may include the following methods:

1) The terminal receives first indication information and/or second indication information from a system message, and receives the target MBS sent by the network according to the first indication information and/or second indication information, wherein the first indication information The one indication information is used to indicate that the target MBS is sent by way of PTM or PTP, and the second indication information is used to indicate the time-frequency resource used when sending the target MBS.

In this manner, the network sends the first indication information and/or the second indication information through a system message, where the first indication information is used to explicitly indicate whether the target MBS is sent through PTM or PTP, so The second indication information is used to indicate the time-frequency resource used when sending the target MBS. In some scenarios, only the second indication information may be sent. At this time, the second indication information not only indicates the time-frequency resource used when sending the target MBS, but also can be used to implicitly indicate the target MBS. MBS transmission method. For example, when the time-frequency resource indicated by the second indication information is a shared resource, it indicates that the transmission is in the PTM mode; when the time-frequency resource indicated by the second indication information is a dedicated resource, it indicates that the transmission is in the PTP mode send.

2) The terminal receives the mapping relationship between the user group identifier sent by the network and the target MBS, uses the user group identifier mapped by the target MBS to obtain the resource location of the target MBS, and receives the The target MBS sent in PTM mode.

In this way, the terminal receives the mapping relationship between the user group ID sent by the network and the target MBS, and since the network assigns the multicast user group ID to the target MBS, it can determine that the transmission mode of the MBS is PTM. In this way, the terminal can use the user group identifier mapped by the target MBS to detect the physical downlink control channel (Physical Downlink Control CHannel, PDCCH) or multicast control channel (MultiCast Control Channel, MCCH) search space, decode and obtain the target MBS in the physical The resource location on the downlink shared channel (Physical Downlink Shared CHannel, PDSCH) or multicast traffic channel (Multicast Traffic Channel, MTCH), and according to the obtained resource location, receive the target MBS sent by the network through PTM.

Furthermore, the network may also send indication information of the transmission beam and/or time-frequency resource information used by the target MBS to the terminal, so that the terminal may receive the above-mentioned indication information of the transmission beam and/or time-frequency resource information, and then according to The sending beam and/or time-frequency resource information receives the target MBS.

3) The terminal receives a paging message sent by the network or a system message for instructing the terminal to enter the connected state, and receives the target MBS sent by the network through PTP after entering the connected state.

In this method, the network indicates to the terminal that the transmission mode of the target MBS is PTP through a paging message or a system message for instructing the terminal to enter the connected state. In this way, after the terminal enters the connected state according to the above paging message or system message , the terminal may receive the target MBS sent by the network through PTP.

Through the above steps, the embodiment of the present invention realizes that the terminal requests a certain target MBS from the network, and the network sends the target MBS in response to the terminal's request and indicates the transmission mode of the target MBS, so that the terminal can receive its desired MBS implements an implementation scheme of an MBS service initiated by a terminal, which can improve the flexibility of sending the MBS service and improve the user experience of the MBS service.

According to at least one embodiment of the present invention, after the above step 42, when receiving the target MBS, the terminal may also measure the receiving quality of the target MBS and the signal quality of the network, and then send the receiving information of the target MBS to the network Feedback information of at least one of quality information, network signal quality measured by the terminal, and geographic location of the terminal. For example, the identifier of the successfully received MBS service and the evaluation information of the received quality (such as high, medium and low quality) are sent to the network. The terminal may actively send the above feedback information, or send the above feedback information according to the requirements of the network. The above feedback information can also be further sent together with location information such as SSB ID, GPS, WLAN/BT measurement values. By sending the above information, the network can know the receiving quality of the target MBS on the terminal side and other information, and help the network decide whether to change the transmission mode of the target MBS. The network can judge the number and location information of terminals receiving the MBS service according to the above feedback information, and further decide the form of sending the service (such as judging whether to continue the original transmission mode or change the transmission mode).

For example, when the network decides to adjust the transmission mode of the target MBS, it may send adjustment information of the transmission mode of the target MBS to the terminal, where the adjustment information is used to indicate the adjusted transmission mode. In this way, the terminal receives the adjustment information, and adjusts the receiving mode of the target MBS service accordingly.

In addition, before the above step 41, the terminal can also receive the service information of the MBS that the network can provide and/or the broadcasting MBS sent by the network, the service information specifically includes a service ID, a Temporary Mobile Group Identity (TMGI ), time-frequency resource location, reception quality threshold, SSB identifier, and bandwidth part (BWP) identifier. In this way, the terminal can know the MBS service that the network can provide according to the above service information sent by the network.

The terminal may also receive resource information for requesting MBS sent by network broadcast, where the resource information includes a bearer message of the request information, a preamble, a random access opportunity (RO), and a preamble and an MBS mapping relationship. At least one of RO. In this way, in step 41, the terminal may send the request information in step 41 according to the above resource information.

According to some other embodiments of the present invention, during the process of handing over to the target base station, the terminal may also receive a handover command sent by the target base station, and the handover command carries information sent by the target cell that the terminal is interested in or is in progress. Configuration information of the MBS service, the configuration information including at least one of bandwidth part BWP identification information, synchronization signal block SSB identification, channel state information reference signal (CSI-RS) identification and received signal quality threshold. Through the above switching command, the terminal can be informed in advance of the MBS service that the target base station can provide and the reception configuration parameters of the above service.

The MBS transmission method of the embodiment of the present invention is introduced above from the terminal side, and the method of the embodiment of the present invention will be further described below from the network side.

Referring to FIG. 5 , the method for transmitting a multicast broadcast service provided by an embodiment of the present invention may also be applied to a network side device, and the network side device may specifically be a device such as a base station. As shown in Figure 5, the transmission method of the multicast broadcast service includes:

Step 51, the network side device receives the request information for the target MBS sent by at least one terminal.

Here, there may be one or more terminals requesting the same target MBS in the network. The request information generally includes indication information of the target MBS, wherein the indication information of the target MBS may specifically include a service identifier (ID), a temporary mobile group identity (Temporary Mobile Group Identity, TMGI) of the MBS, and One or more of preambles or random access opportunities (RACH occasions, RO) corresponding to the target MBS.

In addition, when the terminal is in an idle state (idle) or an inactive state (inactive), the request information may be sent through any of the following messages:

a) When message 1 or message 3 in the 4-step random access process is sent through the above message 1, a preset preamble (preamble) or a preamble that has a mapping relationship with the target MBS may be used.

b) Message A in the 2-step random access procedure.

c) Radio Resource Control (Radio Resource Control, RRC) connection establishment request message.

d) RRC connection recovery request (RRC Resume) message.

e) Non-Access Stratum (NAS) messages, such as ULInformationTransfer, etc.

When the terminal is in a radio resource control (Radio Resource Control, RRC) connected state, the request information is sent through an RRC message, such as various uplink RRC messages.

In the case where the network side preconfigures the threshold of the network signal quality for receiving MBS, the terminal may send the target MBS in step 51 to the network when the measured network signal quality satisfies the preconfigured threshold. request information.

Optionally, the request information may also carry at least one of the following information: the network signal quality measured by the terminal and the geographic location of the terminal (such as GPS information), to provide to the network side as a transmission method for determining the target MBS reference information. For example, if the network side does not configure the threshold of network signal quality for receiving MBS, the terminal can report the cell signal quality information measured by itself, such as Reference Signal Received Power (Reference Signal Received Power, RSRP), (Reference Signal Received Power Quality, RSRQ) and Signal-to-Interference and Noise Ratio (SINR), etc. The geographic location may be GPS information, wireless local area network/Bluetooth (WLAN/BT) measurement information, synchronization signal block/CSI reference signal (SSB/CSI-RS) identification, for example, the SSB with the best quality measured by the terminal /CSI-RS identifier or SSB/CSI-RS identifier whose quality exceeds a certain threshold.

Optionally, the terminal may also send the service information of the MBS it is interested in to the network, for example, through a preset preamble or RO, or carry the service ID or TMGI of interest in other messages.

Step 52, the network side device determines the transmission mode of the target MBS, sends the indication information of the target MBS transmission mode, and sends the target MBS service, wherein the transmission mode includes PTM and/or PTP.

Here, the network side device determines the transmission mode of the target MBS according to the request information for the target MBS sent by the at least one terminal, sends the indication information of the target MBS transmission mode, and sends the target MBS service,

As an implementation manner, determining the transmission manner of the target MBS may specifically include:

1) When the number of the at least one terminal exceeds a first threshold, determine that the transmission mode of the target MBS is PTM.

For example, when multiple terminals request the target MBS, and the distance between them is relatively long, the network may send the target MBS in PTM mode to save time-frequency resources.

2) When the number of the at least one terminal does not exceed the first threshold, determine that the transmission mode of the target MBS is PTP.

When the number of terminals requesting the target MBS is small, the PTP method can be used for sending, and compared with the PTM sending method, power consumption can be reduced.

According to at least one embodiment of the present invention, the step of sending the indication information of the target MBS transmission mode may include at least one of the following:

a) Send the first indication information and/or the second indication information through a system message, wherein the first indication information is used to indicate that the target MBS is sent by PTM or PTP, and the second indication information is used to indicate that the target MBS sends The time-frequency resource used by the target MBS.

In manner a, the network sends the first indication information and/or the second indication information through a system message. In some scenarios, only the second indication information may be sent. At this time, the second indication information not only indicates the time-frequency resource used when sending the target MBS, but also can be used to implicitly indicate the target MBS. MBS transmission method. For example, when the time-frequency resource indicated by the second indication information is a shared resource, it indicates that the transmission is in the PTM mode; when the time-frequency resource indicated by the second indication information is a dedicated resource, it indicates that the transmission is in the PTP mode send.

b) When the transmission mode of the target MBS is PTM, sending the mapping relationship between the group radio network temporary identifier G-RNTI and the target MBS.

Here, when sending the mapping relationship in mode b, the network side device may also send the sending beam and/or time-frequency resource information used by the target MBS to the terminal, so as to help the terminal receive the target MBS.

c) When the transmission mode of the target MBS is PTP, sending a paging message or a system message for instructing the terminal to enter a connected state to the terminal.

Mode c is applicable to the case that the terminal is in an idle state or inactive state, and the terminal is notified that the target MBS transmission mode is PTP through the above paging message or system message.

Through the above steps, the embodiment of the present invention realizes the scheme that the network side sends the target MBS to the terminal according to the request of the terminal, which can improve the flexibility of sending the MBS service and improve the user's experience of using the MBS service.

According to at least one embodiment of the present invention, the network side device may also receive indication information of the target MBS sent by the terminal, reception quality information of the target MBS, network signal quality measured by the terminal, and geographical location of the terminal. At least one kind of feedback information in the position; then, the network side device adjusts the transmission mode of the target MBS according to the received at least one kind of feedback information, and sends the adjusted information to the receiver of the target MBS Instructions for the transport method. For example, the network side device can judge the number and location information of terminals receiving the MBS service according to the above feedback information, and further decide the form of sending the service (such as judging whether to continue the original transmission mode or change the transmission mode).

In addition, before receiving the request information in step 51, the network side device can also broadcast the service information of the MBS that it can provide and/or the service information of the MBS that is being sent. The service information includes service ID, temporary mobile group identifier TMGI, video At least one of the resource location, the receiving quality threshold, the SSB identifier, and the BWP identifier, so that the terminal knows the information of the MBS that the network can provide.

Optionally, before receiving the request information in step 51, the network side device may also send resource information for requesting the MBS, the resource information including the bearer message of the request information, the preamble, the random access opportunity RO, and the At least one of the preamble and the RO that have a mapping relationship. In this way, in step 51, the terminal may send request information according to the above resource information, and the network side device receives the request information sent by the terminal on the resource corresponding to the above resource information.

According to at least one embodiment of the present invention, when the network side device is the target base station handed over by a certain terminal (for ease of description, here referred to as the first terminal), it receives the information of the first terminal sent by the source base station. Indication information of the MBS service that the terminal is interested in or in progress; when the network side device sends a handover command to the first terminal, the handover command can carry the target cell to send the MBS service that the terminal is interested in or in progress configuration information, the configuration information includes at least one of the identification information of the bandwidth part BWP, the synchronization signal block SSB, the identification of the channel state information reference signal CSI-RS and the received signal quality threshold, so that the first terminal can be in the handover process Obtain the MBS that the network side device can provide and the MBS reception configuration information.

Various methods in the embodiments of the present invention have been introduced above. A device for implementing the above method will be further provided below.

Referring to FIG. 6, an embodiment of the present invention provides a terminal 60, including:

A sending module 61, configured to send request information for the target MBS to the network;

The receiving module 62 is configured to receive indication information of the transmission mode of the target MBS sent by the network, and receive the target MBS, wherein the transmission mode includes point-to-multipoint PTM and/or point-to-point PTP.

Optionally, the sending module is further configured for the terminal to send request information for the target MBS to the network when the measured network signal quality meets a pre-configured threshold.

Optionally, when the terminal is in an idle state or an inactive state, the request information may be sent through any of the following messages:

Message 1 or Message 3 in the 4-step random access process;

Message A in the 2-step random access process;

RRC connection establishment request message;

RRC connection recovery request message;

Non-access stratum NAS message;

When the terminal is in a connected state, the request information is sent through an RRC message.

Optionally, the request information includes indication information of the target MBS;

Wherein, the indication information of the target MBS is one or more of the service identification ID of the MBS, the temporary mobile group identity TMGI, or the preamble or RO opportunity corresponding to the target MBS.

Optionally, the request information further includes at least one of the following information: network signal quality measured by the terminal and the geographic location of the terminal.

Optionally, the receiving module is also used for:

receiving the first indication information and/or the second indication information from a system message, and receiving the target MBS sent by the network according to the first indication information and/or the second indication information, wherein the first indication information is used for Instructing the target MBS to be sent through PTM or PTP, and the second indication information is used to indicate the time-frequency resource used when sending the target MBS; or,

receiving the mapping relationship between the user group identifier sent by the network and the target MBS, using the user group identifier mapped by the target MBS to obtain the resource location of the target MBS, and receiving the resource location of the target MBS according to the obtained resource location. the above target MBS; or,

Receiving a paging message sent by the network or a system message for instructing the terminal to enter the connected state, and receiving the target MBS sent by the network through PTP after entering the connected state.

Optionally, the receiving module is further configured to, when receiving the target MBS sent by the network through PTM according to the obtained resource location, receive the sending beam and/or time frequency used by the target MBS sent by the network Resource information, receiving the target MBS according to the sending beam and/or time-frequency resource information.

Optionally, the sending module is further configured to send at least one of the reception quality information of the target MBS, the network signal quality measured by the terminal, and the geographic location of the terminal to the network.

Optionally, the receiving module is further configured to receive adjustment information of the transmission mode of the target MBS sent by the network, the adjustment information is used to indicate the adjusted transmission mode; according to the adjustment of the transmission mode of the target MBS information to adjust the receiving mode of the target MBS service.

Optionally, the receiving module is further configured to receive the service information of the MBS that the network can provide and/or the broadcasting MBS sent by the network before sending the request information for the target MBS to the network, the service information including at least one of service ID, temporary mobile group identifier TMGI, time-frequency resource location, reception quality threshold, SSB identifier, and BWP identifier; and/or, the terminal receives resource information for requesting MBS sent by network broadcast, The resource information includes a bearer message requesting information, a preamble, a random access opportunity RO, and at least one of the preamble and the RO that have a mapping relationship with the MBS.

Optionally, the receiving module is further configured to receive a handover command sent by the target base station, where the handover command carries configuration information of the target cell sending the MBS service that the terminal is interested in or in progress, and the configuration information includes At least one of bandwidth part BWP identification information, synchronization signal block SSB identification, channel state information reference signal CSI-RS identification and received signal quality threshold.

It should be noted that the terminal in this embodiment is a device corresponding to the method shown in FIG. 4 above, and the implementations in the above embodiments are all applicable to this embodiment of the device, and can also achieve the same technical effect. The above-mentioned terminal provided by the embodiment of the present invention can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect, and the same parts and beneficial effects in this embodiment as those of the method embodiment will not be detailed here. repeat.

Please refer to FIG. 7 , which is a schematic structural diagram of a terminal provided by an embodiment of the present invention. The terminal 700 includes: a processor 701 , a transceiver 702 , a memory 703 , a user interface 704 and a bus interface.

In the embodiment of the present invention, the terminal 700 further includes: a program stored in the memory 703 and executable on the processor 701 .

When the processor 701 executes the program, the following steps are implemented:

Sending request information for the target MBS to the network;

receiving the indication information of the transmission mode of the target MBS sent by the network, and receiving the target MBS, wherein the transmission mode includes point-to-multipoint PTM and/or point-to-point PTP.

It can be understood that, in the embodiment of the present invention, when the computer program is executed by the processor 701, each process of the embodiment of the multicast broadcast service transmission method shown in FIG. 3 can be realized, and the same technical effect can be achieved. To avoid repetition, I won't go into details here.

In FIG. 7 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 701 and various circuits of memory represented by memory 703 are linked together. The bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein. The bus interface provides the interface. Transceiver 702 may be a plurality of elements, including a transmitter and a receiver, providing a means for communicating with various other devices over transmission media. For different user equipments, the user interface 704 may also be an interface capable of connecting externally and internally to required equipment, and the connected equipment includes but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 701 is responsible for managing the bus architecture and general processing, and the memory 703 can store data used by the processor 701 when performing operations.

It should be noted that the terminal in this embodiment is a terminal corresponding to the method shown in FIG. 4 above, and the implementations in the above embodiments are all applicable to this embodiment of the terminal, and can also achieve the same technical effect. In the terminal, the transceiver 702 and the memory 703, as well as the transceiver 702 and the processor 701 can be connected through a bus interface, the function of the processor 701 can also be realized by the transceiver 702, and the function of the transceiver 702 can also be implemented by the processor 701 implementation. What needs to be explained here is that the above-mentioned terminal provided by the embodiment of the present invention can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect. The part and the beneficial effect are described in detail.

In some embodiments of the present invention, a computer-readable storage medium is also provided, on which a program is stored, and when the program is executed by a processor, the following steps are implemented:

Sending request information for the target MBS to the network;

receiving the indication information of the transmission mode of the target MBS sent by the network, and receiving the target MBS, wherein the transmission mode includes point-to-multipoint PTM and/or point-to-point PTP.

When the program is executed by the processor, it can realize all the implementation methods in the above-mentioned multicast broadcast service transmission method applied to the terminal side, and can achieve the same technical effect. To avoid repetition, details are not repeated here.

The embodiment of the present invention provides a network side device 80 shown in FIG. 8, including:

A receiving module 81, configured to receive request information for the target MBS sent by at least one terminal;

The sending module 82 is configured to determine the transmission mode of the target MBS, send indication information of the target MBS transmission mode, and send the target MBS service, wherein the transmission mode includes PTM and/or PTP.

Optionally, the sending module is further configured to determine that the transmission mode of the target MBS is PTM when the number of the at least one terminal exceeds the first threshold; When the first threshold is specified, it is determined that the transmission mode of the target MBS is PTP.

Optionally, the sending module is further configured to send the indication information of the target MBS transmission method according to at least one of the following methods:

Send the first indication information and/or the second indication information through a system message, wherein the first indication information is used to indicate that the target MBS is sent by PTM or PTP, and the second indication information is used to indicate that the target MBS is sent by means of PTM or PTP. The time-frequency resource used when the target MBS;

When the transmission mode of the target MBS is PTM, sending the mapping relationship between the group wireless network temporary identifier G-RNTI and the target MBS;

When the target MBS transmission mode is PTP, sending a paging message or a system message for instructing the terminal to enter a connected state to the terminal.

Optionally, the sending module is further configured to send the sending beam and/or time-frequency resource information used by the target MBS when the mapping relationship between the wireless network of the sending group temporarily identifies the G-RNTI and the target MBS .

Optionally, the receiving module is further configured to receive at least one of the indication information of the target MBS sent by the terminal, the receiving quality information of the target MBS, the network signal quality measured by the terminal, and the geographic location of the terminal a message;

An adjustment module, configured to adjust the transmission mode of the target MBS, and send indication information for indicating the adjusted transmission mode to the receiver of the target MBS.

Optionally, the sending module is further configured to: before receiving the request information for the target MBS sent by at least one terminal: broadcast the service information of the MBS that can be provided by itself and/or the service information of the MBS that is being sent, the service information Including at least one of service ID, temporary mobile group identifier TMGI, video resource location, reception quality threshold, SSB identifier, and BWP identifier; and/or, the network side device sends resource information for requesting MBS, and the resource The information includes a bearer message requesting information, a preamble, a random access opportunity RO, and at least one of the preamble and the RO that have a mapping relationship with the MBS.

Optionally, the receiving module is further configured to, when the network side device itself is the target base station handed over by the first terminal, receive the indication information of the MBS service that the terminal of the first terminal is interested in or in progress sent by the source base station ;

The sending module is further configured to, when sending a handover command to the first terminal, carry in the handover command the configuration information of the target cell sending the MBS service that the terminal is interested in or in progress, and the configuration information includes a bandwidth part At least one of BWP identification information, synchronization signal block SSB, channel state information reference signal CSI-RS identification and received signal quality threshold.

It should be noted that the device in this embodiment is a device corresponding to the method shown in FIG. 5 above, and the implementations in the above embodiments are all applicable to this embodiment of the device, and can also achieve the same technical effect. It should be noted here that the above-mentioned device provided by the embodiment of the present invention can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect. The part and the beneficial effect are described in detail.

Please refer to FIG. 9 , an embodiment of the present invention provides a schematic structural diagram of a network side device 900, including: a processor 901, a transceiver 902, a memory 903, and a bus interface, wherein:

In the embodiment of the present invention, the network side device 900 further includes: a program stored in the memory 903 and operable on the processor 901, when the program is executed by the processor 901, the following steps are implemented:

receiving request information for the target MBS sent by at least one terminal;

determining the transmission mode of the target MBS, sending indication information of the target MBS transmission mode, and sending the target MBS service, wherein the transmission mode includes PTM and/or PTP.

It can be understood that, in the embodiment of the present invention, when the computer program is executed by the processor 901, the various processes of the embodiment of the multicast broadcast service transmission method shown in FIG. 5 can be realized, and the same technical effect can be achieved. To avoid repetition, I won't go into details here.

In FIG. 9 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 901 and various circuits of memory represented by memory 903 are linked together. The bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein. The bus interface provides the interface. Transceiver 902 may be a plurality of elements, including a transmitter and a receiver, providing a means for communicating with various other devices over transmission media.

The processor 901 is responsible for managing the bus architecture and general processing, and the memory 903 can store data used by the processor 901 when performing operations.

It should be noted that the network-side device in this embodiment is a device corresponding to the method shown in FIG. technical effect. In the terminal, the transceiver 902 and the memory 903, as well as the transceiver 902 and the processor 901 can be connected through a bus interface, and the functions of the processor 901 can also be realized by the transceiver 902, and the functions of the transceiver 902 can also be implemented by the processor 901 achieved. What needs to be explained here is that the above-mentioned network-side device provided by the embodiment of the present invention can implement all the method steps implemented by the above-mentioned method embodiment, and can achieve the same technical effect. The same parts and beneficial effects as the example are described in detail.

In some embodiments of the present invention, a computer-readable storage medium is also provided, on which a program is stored, and when the program is executed by a processor, the following steps are implemented:

receiving request information for the target MBS sent by at least one terminal;

determining the transmission mode of the target MBS, sending indication information of the target MBS transmission mode, and sending the target MBS service, wherein the transmission mode includes PTM and/or PTP.

When the program is executed by the processor, it can realize all the implementation methods in the above-mentioned multicast broadcast service transmission method applied to the network side equipment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.

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

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (24)

1. A transmission method of a multicast broadcast service MBS, comprising:

the terminal sends request information aiming at a target MBS to a network, wherein the request information comprises indication information of the target MBS; wherein, the indication information of the target MBS is one or more of a service identification ID of the MBS, a temporary mobile group identification TMGI or a preamble or RO opportunity corresponding to the target MBS;

the terminal receives indication information of a transmission mode of the target MBS sent by a network and receives the target MBS, wherein the transmission mode comprises point-to-multipoint PTM and/or point-to-point PTP;

wherein:

the step of the terminal sending request information for the target MBS to a network comprises the following steps: the terminal sends request information aiming at the target MBS to a network under the condition that the measured network signal quality meets a preset threshold;

or,

after the step of receiving the target MBS, the method further comprises: the terminal sends at least one of the receiving quality information of the target MBS, the network signal quality measured by the terminal and the geographic position of the terminal to the network.

2. The method of claim 1, wherein,

When the terminal is in an idle state or a non-activated state, the request information can be sent through any one of the following messages:

message 1 or message 3 in the 4-step random access process;

2, message A in the random access process;

an RRC connection setup request message;

an RRC connection resume request message;

non-access stratum NAS messages;

and when the terminal is in a connection state, the request information is sent through an RRC message.

3. The method of claim 1, wherein the request information further comprises at least one of: the terminal measures the obtained network signal quality and the geographical position of the terminal.

4. The method of claim 1, wherein the step of receiving the target MBS by the terminal receiving the indication information of the transmission mode of the target MBS service sent by the network comprises:

the terminal receives first indication information and/or second indication information from a system message, and receives the target MBS sent by a network according to the first indication information and/or the second indication information, wherein the first indication information is used for indicating the target MBS to be sent in a PTM or PTP mode, and the second indication information is used for indicating time-frequency resources used when the target MBS is sent; or,

The terminal receives the mapping relation between the user group identifier sent by the network and the target MBS, obtains the target MBS resource position by utilizing the user group identifier mapped by the target MBS, and receives the target MBS sent by the network in a PTM mode according to the obtained resource position; or,

the terminal receives paging information sent by a network or system information for indicating the terminal to enter a connection state, and receives the target MBS sent by the network in a PTP mode after entering the connection state.

5. The method of claim 4, wherein the step of receiving the target MBS transmitted by the network through the PTM according to the obtained resource location comprises:

the terminal receives the sending wave beam and/or time-frequency resource information used by the target MBS sent by the network, and receives the target MBS according to the sending wave beam and/or time-frequency resource information.

6. The method of any one of claims 1 to 5, further comprising:

the terminal receives adjustment information of the transmission mode of the target MBS sent by a network, wherein the adjustment information is used for indicating the adjusted transmission mode;

and the terminal adjusts the receiving mode of the target MBS service according to the adjusting information of the transmission mode of the target MBS.

7. The method of claim 1, wherein before the step of transmitting the request information for the target MBS to the network, the method further comprises:

the terminal receives service information of MBS and/or broadcasting MBS which can be provided by the network and is sent by the network, wherein the service information comprises at least one of service ID, temporary Mobile Group Identification (TMGI), time-frequency resource position, receiving quality threshold, SSB identification and BWP identification;

and/or the number of the groups of groups,

the terminal receives resource information which is sent by network broadcast and is used for requesting MBS, wherein the resource information comprises at least one of a bearing message of the request information, a lead code, a random access opportunity RO and a lead code and an RO which have mapping relation with the MBS.

8. The method as recited in claim 1, further comprising:

the terminal receives a handover command sent by a target base station, wherein the handover command carries configuration information of MBS service which is interested or in progress by the target cell and comprises at least one of bandwidth part BWP identification information, a synchronization signal block SSB identification, a channel state information reference signal CSI-RS identification and a receiving signal quality threshold.

9. A transmission method of a multicast broadcast service MBS, comprising:

the method comprises the steps that network side equipment receives request information aiming at a target MBS and sent by at least one terminal, wherein the request information comprises indication information of the target MBS; wherein, the indication information of the target MBS is one or more of a service identification ID of the MBS, a temporary mobile group identification TMGI or a preamble or RO opportunity corresponding to the target MBS;

the network side equipment determines the transmission mode of the target MBS, sends the indication information of the transmission mode of the target MBS and sends the target MBS service, wherein the transmission mode comprises PTM and/or PTP;

wherein:

the method further comprises the steps of: the network side equipment receives at least one of indication information of the target MBS, receiving quality information of the target MBS, network signal quality measured by the terminal and geographic position of the terminal, wherein the indication information is sent by the terminal; the network side equipment adjusts the transmission mode of the target MBS and sends indication information for indicating the adjusted transmission mode to a receiver of the target MBS;

or,

before the step of receiving the request information for the target MBS sent by at least one terminal, the network side device broadcasts the service information of the MBS that can be provided by itself and/or the MBS being sent, where the service information includes at least one of a service ID, a temporary mobile group identifier TMGI, a video resource location, a reception quality threshold, an SSB identifier, and a BWP identifier.

10. The method of claim 9, wherein the step of determining the transmission mode of the target MBS by the network side device comprises at least one of:

determining that the transmission mode of the target MBS is PTM under the condition that the number of the at least one terminal exceeds a first threshold;

and when the number of the at least one terminal does not exceed the first threshold, determining that the transmission mode of the target MBS is PTP.

11. The method of claim 10, wherein the step of transmitting the indication of the target MBS transmission mode comprises at least one of:

sending first indication information and/or second indication information through a system message, wherein the first indication information is used for indicating the target MBS to send through a PTM or PTP mode, and the second indication information is used for indicating time-frequency resources used when the target MBS is sent;

when the transmission mode of the target MBS is PTM, sending the mapping relation between the group wireless network temporary identifier G-RNTI and the target MBS;

and when the target MBS transmission mode is PTP, sending a paging message or a system message for indicating the terminal to enter a connection state to the terminal.

12. The method as recited in claim 10, further comprising:

and when the mapping relation between the group wireless network temporary identifier G-RNTI and the target MBS is transmitted, the network side equipment also transmits the transmission wave beam and/or time-frequency resource information used by the target MBS.

13. The method of claim 9, wherein before the step of receiving the request information for the target MBS transmitted by the at least one terminal, the method further comprises:

the network side equipment sends resource information for requesting MBS, wherein the resource information comprises at least one of a bearing message of the request information, a lead code, a random access opportunity RO and a lead code and an RO which have mapping relation with the MBS.

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

when the network side equipment is a target base station switched by a first terminal, receiving indication information of MBS service which is interested in or is in progress by a terminal of the first terminal and sent by a source base station;

when the network side equipment sends a switching command to the first terminal, the switching command carries configuration information of MBS business which is interested or in progress by the terminal and is sent by a target cell, wherein the configuration information comprises at least one of bandwidth part BWP identification information, a synchronous signal block SSB, an identification of a channel state information reference signal CSI-RS and a receiving signal quality threshold.

15. A terminal, comprising:

a sending module, configured to send request information for a target MBS to a network, where the request information includes indication information of the target MBS; wherein, the indication information of the target MBS is one or more of a service identification ID of the MBS, a temporary mobile group identification TMGI or a preamble or RO opportunity corresponding to the target MBS;

a receiving module, configured to receive indication information of a transmission mode of the target MBS sent by a network, and receive the target MBS, where the transmission mode includes point-to-multipoint PTM and/or point-to-point PTP;

wherein:

the sending module is further configured to send request information for the target MBS to a network when the measured network signal quality meets a preset threshold;

or,

the sending module is further configured to send at least one of the reception quality information of the target MBS, the network signal quality measured by the terminal, and the geographic location of the terminal to the network.

16. The terminal of claim 15, wherein,

the receiving module is further configured to:

receiving first indication information and/or second indication information from a system message, and receiving the target MBS sent by a network according to the first indication information and/or the second indication information, wherein the first indication information is used for indicating the target MBS to be sent in a PTM or PTP mode, and the second indication information is used for indicating time-frequency resources used when the target MBS is sent; or,

Receiving a mapping relation between a user group identifier sent by a network and the target MBS, obtaining the resource position of the target MBS by utilizing the user group identifier mapped by the target MBS, and receiving the target MBS sent by the network in a PTM mode according to the obtained resource position; or,

and receiving paging information sent by a network or system information for indicating the terminal to enter a connection state, and receiving the target MBS sent by the network in a PTP mode after entering the connection state.

17. A terminal comprising a transceiver and a processor, wherein,

the transceiver is configured to send request information for a target MBS to a network, where the request information includes indication information of the target MBS; wherein, the indication information of the target MBS is one or more of a service identification ID of the MBS, a temporary mobile group identification TMGI or a preamble or RO opportunity corresponding to the target MBS; receiving indication information of a transmission mode of the target MBS sent by a network, and receiving the target MBS, wherein the transmission mode comprises broadcasting, multicasting and unicasting;

the transceiver is further configured to send, to a network, request information for the target MBS if the network signal quality measured by the terminal meets a preset threshold, or send, to the network, at least one of reception quality information of the target MBS, the network signal quality measured by the terminal, and a geographic location of the terminal after receiving the target MBS.

18. A terminal, comprising: processor, memory and program stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the transmission method of a multicast broadcast service MBS according to any of the claims 1 to 8.

19. A network side device, comprising:

a receiving module, configured to receive request information for a target MBS sent by at least one terminal, where the request information includes indication information of the target MBS; wherein, the indication information of the target MBS is one or more of a service identification ID of the MBS, a temporary mobile group identification TMGI or a preamble or RO opportunity corresponding to the target MBS;

a sending module, configured to determine a transmission mode of the target MBS, send indication information of the transmission mode of the target MBS, and send the target MBS service, where the transmission mode includes PTM and/or PTP;

wherein:

the receiving module is further configured to receive at least one of indication information of the target MBS, receiving quality information of the target MBS, network signal quality measured by the terminal, and a geographic location of the terminal, where the indication information is sent by the terminal; the network side device further includes: the adjusting module is used for adjusting the transmission mode of the target MBS and sending indication information for indicating the adjusted transmission mode to a receiver of the target MBS;

Or,

the sending module is further configured to, before receiving the request information for the target MBS sent by the at least one terminal: the broadcast transmission itself may provide service information of the MBS and/or the transmitting MBS, where the service information includes at least one of a service ID, a temporary mobile group identity TMGI, a video resource location, a reception quality threshold, an SSB identity, and a BWP identity.

20. The network-side device of claim 19,

the sending module is further configured to determine that the transmission mode of the target MBS is PTM when the number of the at least one terminal exceeds a first threshold; and when the number of the at least one terminal does not exceed the first threshold, determining that the transmission mode of the target MBS is PTP.

21. The network-side device of claim 19,

the sending module is further configured to send the indication information of the target MBS transmission mode according to at least one of the following modes:

sending first indication information and/or second indication information through a system message, wherein the first indication information is used for indicating the target MBS to send through a PTM or PTP mode, and the second indication information is used for indicating time-frequency resources used when the target MBS is sent;

When the transmission mode of the target MBS is PTM, sending the mapping relation between the group wireless network temporary identifier G-RNTI and the target MBS;

and when the target MBS transmission mode is PTP, sending a paging message or a system message for indicating the terminal to enter a connection state to the terminal.

22. A network side device comprising a transceiver and a processor, wherein,

the transceiver is configured to receive request information for a target MBS sent by at least one terminal, where the request information includes indication information of the target MBS; wherein, the indication information of the target MBS is one or more of a service identification ID of the MBS, a temporary mobile group identification TMGI or a preamble or RO opportunity corresponding to the target MBS;

the processor is configured to determine a transmission mode of the target MBS, send indication information of the transmission mode of the target MBS, and send the target MBS service, where the transmission mode includes PTM and/or PTP;

wherein:

the transceiver is further configured to receive at least one of indication information of the target MBS, reception quality information of the target MBS, network signal quality measured by the terminal, and a geographic location of the terminal, which are sent by the terminal; the processor is further configured to adjust a transmission mode of the target MBS, and send indication information for indicating the adjusted transmission mode to a receiver of the target MBS;

Or,

the transceiver is further configured to, before receiving the request information for the target MBS sent by the at least one terminal: the broadcast transmission itself may provide service information of the MBS and/or the transmitting MBS, where the service information includes at least one of a service ID, a temporary mobile group identity TMGI, a video resource location, a reception quality threshold, an SSB identity, and a BWP identity.

23. A network side device, comprising: processor, memory and program stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the transmission method of a multicast broadcast service MBS according to any of the claims 9 to 14.

24. A computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, which when executed by a processor, implements the steps of the transmission method of a multicast broadcast service MBS according to any of the claims 1 to 14.

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