WO2022006852A1

WO2022006852A1 - Wireless communication method, terminal device and network device

Info

Publication number: WO2022006852A1
Application number: PCT/CN2020/101326
Authority: WO
Inventors: 王淑坤
Original assignee: Oppo广东移动通信有限公司
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2022-01-13
Also published as: CN115516881A

Abstract

Provided are a wireless communication method, a terminal device and a network device. The method comprises: a terminal device sending first information to a network device, wherein the first information is used for determining a first user group to which the terminal device belongs when the network device sends downlink data to the terminal device in a multicast manner; and the terminal device receiving configuration information of the first user group, such that the consumption of wireless resources can be reduced.

Description

Wireless communication method, terminal device and network device

technical field

The embodiments of the present application relate to the field of communication, and more particularly, to a wireless communication method, a terminal device, and a network device.

Background technique

In the New Radio (NR) system, for the Multicast Service (MBS), the network device can not only send the downlink data of the MBS service to the terminal device in the multicast mode, but also can deal with poor channel quality or capability. Poor terminal equipment sends downlink data of MBS service in unicast mode. Therefore, when there are a large number of terminal devices with poor channel quality or poor capabilities in a cell, the network device must use unicast to send downlink data for these types of terminal devices, and a large number of unicast transmissions will inevitably cause radio resources. consume.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a wireless communication method, a terminal device, and a network device, so that the consumption of wireless resources can be reduced.

A first aspect provides a wireless communication method, the method includes: a terminal device sends first information to a network device, where the first information is used to determine when the network device sends downlink data to the terminal device in a multicast manner, to which the terminal device belongs the first user group; the terminal device receives the configuration information of the first user group.

In a second aspect, a wireless communication method is provided, the method comprising: a network device receiving first information, where the first information is used to determine, when the network device sends downlink data to the terminal device in a multicast manner, the first information to which the terminal device belongs. User group; the network device sends the configuration information of the first user group to the terminal device.

In a third aspect, a terminal device is provided for executing the method in the above-mentioned first aspect or each implementation manner thereof.

Specifically, the terminal device includes a functional module for executing the method in the above-mentioned first aspect or each implementation manner thereof.

In a fourth aspect, a network device is provided for executing the method in the second aspect or each of its implementations.

Specifically, the network device includes functional modules for executing the methods in the second aspect or the respective implementation manners thereof.

In a fifth aspect, a terminal device is provided, including a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in the above-mentioned first aspect or each implementation manner thereof.

In a sixth aspect, a network device is provided, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the second aspect or each of its implementations.

In a seventh aspect, an apparatus is provided for implementing any one of the above-mentioned first aspect to the second aspect or the method in each implementation manner thereof.

Specifically, the apparatus includes: a processor for calling and running a computer program from a memory, so that a device installed with the apparatus executes any one of the above-mentioned first to second aspects or each of its implementations method.

In an eighth aspect, a computer-readable storage medium is provided for storing a computer program, the computer program causing a computer to execute the method in any one of the above-mentioned first aspect to the second aspect or each of its implementations.

In a ninth aspect, a computer program product is provided, comprising computer program instructions, the computer program instructions cause a computer to execute the method in any one of the above-mentioned first aspect to the second aspect or each of its implementations.

In a tenth aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method in any one of the above-mentioned first to second aspects or the respective implementations thereof.

Through the technical solutions of the first aspect or the second aspect, unicast transmission can be reduced. For example, for such terminal devices with poor channel quality or poor capabilities, they will be divided into one or more user groups, and the network device can The downlink data is sent to such terminal devices through multicast, thereby reducing the consumption of radio resources.

Description of drawings

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

FIG. 2 is an interaction flowchart of a wireless communication method provided by an embodiment of the present application;

3 is a schematic diagram of user group division provided by the present application;

FIG. 4 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application;

FIG. 5 shows a schematic block diagram of a network device 500 according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a communication device 800 provided by an embodiment of the present application;

7 is a schematic structural diagram of a device according to an embodiment of the present application;

FIG. 8 is a schematic block diagram of a communication system 1000 provided by an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. With regard to the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The embodiments of the present application may be applied to various communication systems, for example: a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (Wideband Code) system Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (Long Term Evolution, LTE) system, Advanced Long Term Evolution (Advanced long term evolution, LTE-A) system, NR system , NR system evolution system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum, NR-U) system on unlicensed spectrum, general Mobile communication system (Universal Mobile Telecommunication System, UMTS), Wireless Local Area Network (Wireless Local Area Networks, WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), next-generation communication system or other communication systems, etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), and vehicle to vehicle (Vehicle to Vehicle, V2V) communication, etc., the embodiments of the present application can also be applied to these communications system.

Optionally, the communication system in this embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) distribution. web scene.

This embodiment of the present application does not limit the applied spectrum. For example, the embodiments of the present application may be applied to licensed spectrum, and may also be applied to unlicensed spectrum.

Exemplarily, a communication system 100 to which this embodiment of the present application is applied is shown in FIG. 1 . The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, a terminal). The network device 110 may provide communication coverage for a particular geographic area, and may communicate with terminal devices located within the coverage area.

FIG. 1 exemplarily shows one network device and two terminal devices. Optionally, the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. This application The embodiment does not limit this.

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

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

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

The embodiments of this application describe various embodiments in conjunction with terminal equipment and network equipment, where: terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc. The terminal device can be a station (STAION, ST) in the WLAN, can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, and next-generation communication systems, such as terminal devices in NR networks or Terminal equipment in the future evolved Public Land Mobile Network (Public Land Mobile Network, PLMN) network, etc.

As an example and not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart jewelry, etc. for physical sign monitoring.

A network device can be a device used to communicate with a mobile device. The network device can be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, or a WCDMA The base station (NodeB, NB) can also be an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or an access point, or a vehicle-mounted device, a wearable device, and a network device or base station in an NR network ( gNB) or network equipment in the future evolved PLMN network, etc.

In this embodiment of the present application, a network device provides services for a cell, and a terminal device communicates with the network device through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device (for example, a frequency domain resource). The cell corresponding to the base station), the cell can belong to the macro base station, or it can belong to the base station corresponding to the small cell (Small cell), where the small cell can include: Metro cell, Micro cell, Pico cell cell), Femto cell, etc. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-speed data transmission services.

Before introducing the technical solution of the present application, the following introduces the MBMS service and the characteristics of the MBS service:

The International Telecommunication Union (ITU) defines three types of application scenarios for the fifth generation (5Generation, 5G) mobile communication system and future mobile communication systems: Enhanced Mobile Broadband (eMBB), high reliability Ultra Reliable and Low Latency Communications (URLLC) and Massive Machine Type Communications (mMTC). Typical eMBB services include: Ultra HD video, Augmented Reality (AR), Virtual Reality (VR), etc. The main features of these services are the large amount of transmitted data and high transmission rate. Typical URLLC businesses include: wireless control in industrial manufacturing or production processes, motion control of driverless cars and drones, and tactile interaction applications such as remote repair and remote surgery. The main features of these services are ultra-reliable requirements. high reliability, low latency, small amount of transmitted data, and burstiness. Typical mMTC services include: smart grid power distribution automation, smart city, etc. The main features are the huge number of networked devices, the small amount of data transmitted, and the insensitivity of data to transmission delay. These mMTC terminals need to meet low cost and very long standby time. time requirements.

A large number of mobile data multimedia services and various high-bandwidth multimedia services, such as Internet Protocol Television (IPTV) and mobile TV (Television, TV) provide high robustness and extremely important communication services, such as: disaster situations The multicast communication, public safety network, etc. have put forward higher requirements for multicast/broadcast/multicast services. These mobile data multimedia services require multiple users to receive the same data at the same time. Compared with general data services, they have the characteristics of large data volume, long duration, and delay sensitivity. At present, the 3rd Generation Partnership Project (3GPP) proposes the Multimedia Broadcast Multicast Service (MBMS), which supports the provision of multicast/broadcast/multicast networks in cellular systems. The technology of transmitting data from one data source to multiple terminal devices realizes the resource sharing between the core network and the access network, thereby improving the utilization rate of network resources. The MBMS service defined by 3GPP can not only realize the multicast and broadcast of messages with low rate of plain text, but also realize the broadcast and multicast of high-speed multimedia services, so as to provide users with a variety of rich video, audio and multimedia services. The characteristics of the broadcast service enable better efficiency when transmitting information of interest to the public, which undoubtedly conforms to the future trend of mobile data development and provides better business prospects for the development of communication technology.

Currently, a shared GPRS Tunneling Protocol (GTP) tunnel is used between the 5G core network (5G Core Network, 5GC) and the gNB for the packet data unit (PDU) session of the MBS service. The MBMS service, that is, whether it is a unicast service or a multicast service in a cell, all share the GTP tunnel.

The MBS service is a typical service in MBMS. As mentioned above, in the NR system, for the MBS service, in addition to sending the downlink data of the MBS service to the terminal device by multicast, the network device can also target the poor channel quality or poor capability. The terminal equipment sends the downlink data of the MBS service in a unicast manner. Therefore, when there are a large number of terminal devices with poor channel quality or poor capabilities in a cell, the network device must use unicast to send downlink data for these types of terminal devices, and a large number of unicast transmissions will inevitably cause radio resources. waste.

In order to solve the above technical problem, in the present application, the network device divides the corresponding user groups for the terminal device to perform multicast transmission.

The technical solutions of the present application are described in detail below through specific embodiments.

FIG. 2 is an interaction flowchart of a wireless communication method provided by an embodiment of the present application, and the method includes the following steps:

Step S210: The terminal device sends the first information to the network device.

Step S220: The network device sends the configuration information of the first user group to the terminal device.

The following describes step S210 in detail:

The first information is used to determine the first user group to which the terminal device belongs when the network device sends downlink data to the terminal device in a multicast manner. That is, the first information is information used by the network device to divide the terminal device into user groups.

Optionally, the first information includes at least one of the following: a measurement result of the terminal device, a quality of service (Quality of Service, QoS) of the multicast service subscribed by the terminal device, and the priority of the multicast service on the terminal device side.

Optionally, the measurement result of the terminal device is any one of the following: the measurement result of the terminal device in the connected state (RRC_CONNECTED), the measurement result of the terminal device in the idle state (RRC_IDLE), the terminal device in the inactive state (RRC_INACTIVE) measurement results below.

The measurement in the RRC_IDLE state serves for cell reselection. The paging of the terminal equipment in the RRC_IDLE state is initiated by the core network side, and the paging area is also configured by the core network side. There is no access layer (Access Layer) of the terminal equipment on the access network side. Stratum, AS) context, the terminal equipment in the RRC_IDLE state does not have Radio Resource Control (Radio Resource Control, RRC).

The terminal equipment in the RRC_IDLE state has an RRC connection. The AS context of the terminal equipment exists on both the access network side and the terminal equipment side. The access network side determines that the location of the terminal equipment is at the cell level. The mobility of this type of terminal equipment is Access network-side controlled mobility. Unicast data can be transmitted between terminal equipment and network equipment.

The measurement in the RRC_INACTIVE state serves for cell reselection, there is a connection between the core network and the NR system (CN-NR), the AS context of the terminal device in the RRC_INACTIVE state exists on a certain network device, the paging is triggered by the RAN, based on the RAN The paging area of the RAN is managed by the RAN, and the network side knows the location of the UE based on the paging area level of the RAN.

Optionally, the measurement result of the terminal device in the connected state includes at least one of the following: reference signal received power (Reference Signal Received Power, RSRP) of the serving cell of the terminal device. The reference signal received quality (Reference Signal Received Quality, RSRQ) of the serving cell of the terminal device. Signal to Interference plus Noise Ratio (SINR) of the serving cell of the terminal device. Signal to interference ratio (Signal Interference Ratio, SIR) of the serving cell of the terminal device. RSRP of the same-frequency neighbor cell of the serving cell. The RSRQ of the serving cell's co-frequency neighbor cells. Indicates the SINR of the same-frequency neighbor cell of the serving cell. Indicates the SIR of the serving cell's co-frequency neighbor cells. RSRP of the inter-frequency neighbor cells of the serving cell. RSRQ of the inter-frequency neighbor cells of the serving cell. The SINR of the serving cell's inter-frequency neighbor cells. The SIR of the serving cell's inter-frequency neighbor cells. RSRP of other cells belonging to a different system than the serving cell. RSRQ of other cells belonging to a different system from the serving cell. SINR of other cells belonging to a different system than the serving cell. SIRs of other cells belonging to a different system than the serving cell.

Optionally, the measurement result of the terminal device in the idle state or the inactive state includes at least one of the following: RSRP of the cell where the terminal device resides. The RSRQ of the cell where the terminal device is camped on. The SINR of the cell where the terminal device is camped on. The SIR of the cell where the terminal device is camped on. RSRP of the same-frequency neighbor cell of the camping cell. The RSRQ of the same-frequency neighbor cell of the camping cell. Indicates the SINR of the same-frequency neighbor cell of the camping cell. The SIR of the same-frequency neighbor cell of the camping cell. RSRP of inter-frequency neighbor cells of the camping cell. The RSRQ of the inter-frequency neighbor cells of the camping cell. The SINR of the inter-frequency neighbor cells of the camping cell. The SIR of the inter-frequency neighbor cell of the camping cell. RSRP of other cells belonging to different systems from the camping cell. RSRQ of other cells belonging to different systems from the camping cell. SINR of other cells belonging to different systems from the camping cell. SIRs of other cells belonging to a different system than the camping cell.

Optionally, for a terminal device, it can carry multiple services, and each service has a corresponding priority. Wherein, each service has a corresponding priority which may be configured by the network device, or may be determined by the terminal device according to its own capability or type, which is not limited in this application.

Optionally, after the network device receives the first information, the network device may determine the user group to which the terminal device belongs according to the first information, or determine that the network device sends downlink data of the multicast service to the terminal device in a unicast manner. Specifically, the network device may configure corresponding at least one item of information for each user group: a measurement result threshold, a service QoS threshold, and a service priority threshold.

Exemplarily, the RSRP thresholds of the serving cell of the terminal device configured by the network device for the user group A are RSRP1 to RSRP2, that is, when the RSRP of the serving cell of a terminal device is between RSRP1 and RSRP2, the terminal device is divided into users. group A. The RSRP thresholds of the serving cell of the terminal device configured by the network device for the user group B are RSRP3 to RSRP4, that is, when the RSRP of the serving cell of a terminal device is between RSRP3 and RSRP4, the terminal device is divided into the user group B. The RSRP thresholds of the serving cell of the terminal device configured by the network device for the user group C are RSRP5 to RSRP6, that is, when the RSRP of the serving cell of a terminal device is between RSRP3 and RSRP4, the terminal device is divided into the user group C.

Exemplarily, the QoS thresholds of the service of the terminal device configured by the network device for the user group A are QoS1 to QoS2, that is, when the QoS of the service of a terminal device is between QoS1 and QoS2, the terminal device is divided into the user group A. . The QoS thresholds of the service of the terminal equipment configured by the network device for the user group B are QoS3 to QoS4, that is, when the QoS of the service of a terminal equipment is between QoS3 and QoS4, the terminal equipment is classified into the user group B. The QoS thresholds of the service of the terminal equipment configured by the network device for the user group C are QoS5 to QoS6, that is, when the QoS of the service of a terminal equipment is between QoS5 and QoS6, the terminal equipment is divided into the user group C.

Exemplarily, the priority threshold of the service configured by the network device for the user group A is from priority 1 to priority 2, that is, when the priority of the service of a terminal device is between priority 1 and priority 2, then the terminal Devices are divided into user group A. The priority thresholds of the services of the terminal devices configured by the network device for user group B are from priority 3 to priority 4, that is, when the priority of the service of a terminal device is between priority 3 and priority 4, the terminal device be assigned to user group B. The priority threshold of the service of the terminal device configured by the network device for the user group C is from priority 5 to priority 6, that is, when the priority of the service of a terminal device is between priority 5 and priority 6, then the terminal device be assigned to user group C.

FIG. 3 is a schematic diagram of user group division provided by the present application. As shown in FIG. 3 , the network device divides UE1 and UE2 into one user group according to their respective first information, namely user group 1, according to the respective first information of UE1 and UE4. The first information divides the two into another user group, that is, user group 2. It should be noted that, for the PDU session of the MBS service, a shared GTP tunnel is used between the 5G core network (5GC) and the gNB to transmit the MBMS service, that is, whether it is a unicast service or a multicast service in the cell, this is shared. GTP tunnel.

Optionally, the network device can send the downlink data of the multicast service to the terminal device in a unicast manner only when the first information of the terminal device meets higher requirements, for example: the RSRP of the serving cell of the terminal device is smaller than that of the user group. The corresponding minimum RSRP. Or, the QoS of the multicast service subscribed by the terminal device is less than the minimum QoS corresponding to the user group, or, on the terminal device side, the priority of the multicast service is higher than the highest priority corresponding to the user group, and the network device can use the unicast method. Send downlink data of multicast service to terminal equipment.

The following describes step S220 in detail:

Optionally, the configuration information of the first user group is used for the terminal devices in the first user group to receive the multicast service.

Optionally, the configuration information is carried in dedicated signaling.

Optionally, the dedicated signaling is RRC connection reconfiguration signaling (RRC Connection Reconfiguration).

Optionally, the configuration information includes at least one of the following: Group-Radio Network Tempory Identity (G-RNTI), Temporary Mobile Group Identity (TMGI), configuration of search space, multicast service part of the bandwidth part (BWP) configuration.

The G-RNTI is used to scramble a physical downlink control channel (Physical Downlink Control Channel, PDCCH), and the PDCCH is used to schedule a physical downlink shared physical channel (Physical Downlink Shared Channel, PDSCH) of the multicast service.

Each multicast service can be uniquely identified by a corresponding TMGI, which can include a Public Land Mobile Network (Public Land Mobile Network, PLMN) identifier plus a service identifier.

The configuration of the search space is the search space of the PDCCH corresponding to the multicast service, and the search space may be a public search space or a dedicated search space.

Optionally, on each component carrier, a terminal device can be configured with up to 4 BWPs, but only one of them is in an active state at a certain moment. The BWP in the active state represents the working bandwidth used by the terminal device within the working bandwidth of the cell, and outside the BWP, the terminal device will not receive PDSCH, PDCCH, and the like.

To sum up, in this application, the network device can divide the terminal device into corresponding user groups according to the first information of the terminal device, and provide the terminal device with the configuration information of the user group to which the terminal device belongs, so that the terminal device can pass the user group to which the terminal device belongs. User group configuration information to receive multicast services. In this way, unicast transmission can be reduced. For example, for terminal devices with poor channel quality or poor capabilities, they will be divided into one or more user groups, and network devices can multicast to such terminals. The device sends downlink data, thereby reducing the consumption of radio resources.

Because the first information of the terminal device may change dynamically, for example, the measurement result of the terminal device will change. Based on this, the user group to which the terminal device currently belongs is not necessarily the most suitable user group. Therefore, the network device can switch the terminal device for the terminal device. The user group, or the terminal device switches the user group by itself, so that the terminal device can be divided into the most suitable user group. Alternatively, the network device itself provides multicast services to the terminal device in a unicast mode. Since the first information of the terminal device may change dynamically, for example, the measurement result of the terminal device will change. Based on this, the network device needs to switch to the unicast mode. to the multicast mode to provide multicast services to terminal equipment. Alternatively, the network device itself provides multicast services to the terminal device in the multicast mode. Since the first information of the terminal device may change dynamically, such as the measurement result of the terminal device, the measurement result of the terminal device may change. Based on this, the network device needs to switch the multicast mode. to unicast mode to provide multicast services to terminal equipment. Specifically, the user group switching or the switching of the transmission mode of the multicast service is described by the following embodiments:

Embodiment 1: The terminal device sends the second information to the network device. The network device switches the user group to which the terminal device belongs according to the second information, or switches the unicast mode used by the network device to send downlink data to the terminal device to the multicast mode. The network device sends first indication information to the terminal device, where the first indication information is used to indicate the second user group after the terminal device is switched.

Optionally, the second information includes at least one of the following: channel state information (Channel State Information, CSI) of the serving cell of the terminal device, and RSRP of the serving cell of the terminal device. The RSRQ of the serving cell of the terminal device. SINR of the serving cell of the terminal device. The SIR of the serving cell of the terminal device. Block error rate (Block Error Rate, BLER) or bit error rate (Bit Error Ratio, BER) of the multicast service. Indication information used to indicate the user group that the terminal device expects to switch to.

Optionally, the network device may configure corresponding at least one item of the following information for each user group: a CSI threshold of the serving cell of the terminal device, and an RSRP threshold of the serving cell of the terminal device. The RSRQ threshold of the serving cell of the terminal equipment. The SINR threshold of the serving cell of the terminal equipment. The SIR threshold of the serving cell of the terminal equipment. BLER threshold or BER threshold for multicast services.

Optionally, after the network device determines that the second information of the terminal device satisfies the information corresponding to a certain user group, the network device will switch the terminal device to the user group it satisfies, that is, the above-mentioned second user group, wherein when the terminal device When originally belonging to the first user group, the network device switches the terminal device from the first user group to the second user group. When the terminal device originally uses unicast to receive downlink data of the multicast service, the network device switches the terminal device from the first user group to the second user group. The unicast mode is switched to the multicast mode, and is switched to the second user group.

Optionally, the terminal device may send the identifier of the second user group to the network device, so that the network device knows the user group to which the terminal device currently belongs.

Optionally, after the network device currently does not determine the information corresponding to the user group satisfied by the second information of the terminal device, the network device does not perform user group switching, or does not perform switching from unicast mode to multicast mode.

Exemplarily, when the network device determines that the CSI of the serving cell of the terminal device is between CSI1 and CSI2, and the range of CSI1 and CSI2 corresponds to user group A, the network device switches to user group A at this time. When the network device determines that the CSI of the serving cell of the terminal device is between CSI3 and CSI4, and the range of CSI3 to CSI4 corresponds to user group B, the network device switches to user group B at this time. When the network device determines that the CSI of the serving cell of the terminal device is between CSI5 and CSI6, and the range of CSI5 to CSI6 corresponds to user group C, the network device switches to user group C at this time.

Optionally, the above-mentioned first indication information may be an identifier of the second user group.

Optionally, the terminal device may receive configuration information of multiple user groups. As mentioned above, the configuration information of each user group includes at least one of the following: G-RNTI, TMGI, search space configuration, and BWP configuration for multicast services .

Optionally, the configuration information of the user group has a corresponding relationship with the identifier of the user group. The corresponding relationship may be a one-to-one, many-to-one or many-to-many relationship. Based on this, the terminal device can select the configuration information of the user group corresponding to the first indication information according to the configuration information of multiple user groups and the first indication information, and receive downlink data through the configuration information of the user group, for example, according to the configuration of the user group. The G-RNTI in the information is used to receive scheduling information and receive downlink data of multicast services.

Optionally, the first indication information is carried in downlink control signaling (Downlink control information, DCI) or media access control control element (Media Access Control Control Element, MAC CE).

Optionally, when the second information is used to switch the unicast mode used by the network device to send downlink data to the terminal device to the multicast mode, the terminal device also receives the second indication information sent by the network device, and the second indication information is used It is used to instruct the terminal device to release the configuration information of the terminal device in the unicast mode, or to instruct the terminal device to suspend unicast transmission. Wherein, after the terminal device suspends the unicast transmission, when the terminal device subsequently receives the downlink data in the unicast mode, the terminal device can reactivate the unicast transmission, that is, the configuration information in the unicast mode is used to receive the downlink data.

Embodiment 2: The terminal device receives configuration information of multiple user groups. The terminal device switches the user group to which the terminal device belongs according to the second information and the configuration information of the multiple user groups, or switches the unicast mode used by the network device to send downlink data to the terminal device to the multicast mode.

Optionally, when the terminal device switches the unicast mode used by the network device to send downlink data to the terminal device to the multicast mode, the terminal device further receives the above-mentioned second indication information sent by the network device. Wherein, after the terminal device suspends the unicast transmission, when the terminal device subsequently receives the downlink data in the unicast mode, the terminal device can reactivate the unicast transmission, that is, the configuration information in the unicast mode is used to receive the downlink data.

It should be noted that Embodiment 2 is different from Embodiment 1 in that Embodiment 2 implements user group switching or transmission mode switching by terminal equipment, and Embodiment 1 implements user group switching or transmission mode switching by network equipment. Therefore, in Embodiment 2, reference may be made to the specific implementation manner of Embodiment 1, and the content thereof will not be repeated here.

Embodiment 3: The terminal device sends third information to the network device, and the network device switches the multicast mode used by the network device to send downlink data to the terminal device to the unicast mode according to the third information. The network device sends third indication information to the terminal device, where the third indication information is used to instruct the network device to switch the multicast mode used for sending downlink data to the terminal device to the unicast mode.

Optionally, the third information includes at least one of the following: CSI of a serving cell of the terminal device. RSRP of the serving cell of the terminal device. The RSRQ of the serving cell of the terminal device. SINR of the serving cell of the terminal device. The SIR of the serving cell of the terminal device. BLER or BER of the multicast service.

Optionally, the network device may configure at least one of the following corresponding information for the unicast mode of the terminal device: a CSI threshold of the serving cell of the terminal device, and an RSRP threshold of the serving cell of the terminal device. The RSRQ threshold of the serving cell of the terminal equipment. The SINR threshold of the serving cell of the terminal equipment. The SIR threshold of the serving cell of the terminal equipment. BLER threshold or BER threshold for multicast services.

Optionally, after the network device determines that the third information of the terminal device satisfies the information corresponding to the unicast mode, the network device switches the terminal device to the unicast mode.

Exemplarily, when the network device determines that the BER of the serving cell of the terminal device is greater than the maximum BER corresponding to all user groups, the network device switches the multicast mode used by the network device to send downlink data to the terminal device to the unicast mode.

Optionally, the terminal device may receive downlink data by using configuration information in a unicast manner. Or, the terminal device uses the configuration information in the multicast mode to receive the downlink data in the unicast mode.

Optionally, the third indication information is carried in DCI or MAC CE.

Embodiment 4: The terminal device receives configuration information of multiple user groups. The terminal device switches the multicast mode used by the network device to send the downlink data to the terminal device to the unicast mode according to the third information and the configuration information of the multiple user groups.

It should be noted that the difference between Embodiment 4 and Embodiment 3 is that: Embodiment 4 is that the terminal device realizes the switching of user groups or the switching of transmission modes, and Embodiment 3 is that the network equipment realizes the switching of user groups or the switching of transmission modes. Therefore, in Embodiment 4, reference may be made to the specific implementation manner of Embodiment 3, and the content thereof will not be repeated here.

It should be noted that, when the network device determines the user group to which it currently belongs, for example, when no terminal device in the first user group receives downlink data of the multicast service, the network device sends fourth indication information to the terminal device. The fourth indication information is used to instruct the terminal device to release the configuration information of the terminal device in the multicast mode, or to instruct the terminal device to suspend multicast transmission. Wherein, after the terminal device suspends the multicast transmission, when the terminal device subsequently receives the downlink data in the multicast mode, the terminal device can reactivate the multicast transmission, that is, the configuration information in the multicast mode is used to receive the downlink data.

To sum up, in this application, the terminal device or the network device can switch the terminal device to a suitable user group, or can switch the transmission mode of the terminal device to receive the multicast service, such as switching from the multicast mode to the unicast mode , or switch from the unicast mode to the multicast mode, in a word, through the technical solution provided in this application, the terminal equipment can receive the multicast service in a suitable user group or in a suitable transmission mode, so as to improve the utilization efficiency of wireless resources .

The method embodiments of the present application are described in detail above with reference to FIGS. 2 and 3 , and the device embodiments of the present application are described in detail below with reference to FIGS. 4 to 8 . It should be understood that the device embodiments and the method embodiments correspond to each other, and are similar to For the description, refer to the method embodiment.

FIG. 4 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application. As shown in FIG. 4 , the terminal device 400 includes: a communication unit 410 configured to: send first information to the network device, where the first information is used to determine that when the network device sends downlink data to the terminal device in a multicast manner, the terminal device The first user group to which they belong. Configuration information of the first user group is received.

Optionally, the first information includes at least one of the following: a measurement result of the terminal device, the QoS of the multicast service subscribed by the terminal device, and the priority of the multicast service on the terminal device side.

Optionally, the measurement result of the terminal device is any one of the following: a measurement result of the terminal device in a connected state, a measurement result of the terminal device in an idle state, and a measurement result of the terminal device in an inactive state.

Optionally, the measurement result of the terminal device in the connected state includes at least one of the following: RSRP of the serving cell of the terminal device. The RSRQ of the serving cell of the terminal device. SINR of the serving cell of the terminal device. The SIR of the serving cell of the terminal device. RSRP of the same-frequency neighbor cell of the serving cell. The RSRQ of the serving cell's co-frequency neighbor cells. Indicates the SINR of the same-frequency neighbor cell of the serving cell. Indicates the SIR of the serving cell's co-frequency neighbor cells. RSRP of the inter-frequency neighbor cells of the serving cell. RSRQ of the inter-frequency neighbor cells of the serving cell. The SINR of the serving cell's inter-frequency neighbor cells. The SIR of the serving cell's inter-frequency neighbor cells. RSRP of other cells belonging to a different system than the serving cell. RSRQ of other cells belonging to a different system from the serving cell. SINR of other cells belonging to a different system than the serving cell. SIRs of other cells belonging to a different system than the serving cell.

Optionally, the configuration information is carried in dedicated signaling.

Optionally, the dedicated signaling is RRC connection reconfiguration signaling.

Optionally, the configuration information includes at least one of the following: G-RNTI, TMGI, search space configuration, and BWP configuration of the multicast service.

Optionally, the communication unit 410 is further configured to: send second information to the network device, where the second information is used to switch the user group to which the terminal device belongs, or the second information is used to send downlink data from the network device to the terminal device The unicast mode used is switched to the multicast mode. Receive first indication information, where the first indication information is used to indicate the second user group after the terminal device is switched.

Optionally, the communication unit 410 is further configured to: receive configuration information of multiple user groups. The downlink data is received according to the configuration information of the multiple user groups and the first indication information.

Optionally, the first indication information is carried in DCI or MAC CE.

Optionally, it also includes: a processing unit 420 . The communication unit 410 is further configured to receive configuration information of a plurality of user groups. The processing unit 420 is configured to switch the user group to which the terminal device belongs according to the second information and the configuration information of multiple user groups, or switch the unicast mode used by the network device to send downlink data to the terminal device to the multicast mode.

Optionally, when the second information is used to switch the unicast mode used by the network device to send the downlink data to the terminal device to the multicast mode, the communication unit 410 is further configured to: receive the second indication information sent by the network device, the second The indication information is used to instruct the terminal device to release the configuration information of the terminal device in the unicast mode, or to instruct the terminal device to suspend unicast transmission.

Optionally, the second information includes at least one of the following: CSI of a serving cell of the terminal device. RSRP of the serving cell of the terminal device. The RSRQ of the serving cell of the terminal device. SINR of the serving cell of the terminal device. The SIR of the serving cell of the terminal device. BLER or BER of multicast services. Indication information used to indicate the user group that the terminal device expects to switch to.

Optionally, the communication unit 410 is further configured to: send third information to the network device, where the third information is used to switch the multicast mode used by the network device to send the downlink data to the terminal device to the unicast mode. Receive third indication information, where the third indication information is used to instruct the network device to switch the multicast mode used for sending downlink data to the terminal device to the unicast mode.

Optionally, the third indication information is carried in DCI or MAC CE.

Optionally, it also includes: a processing unit 420 . The communication unit 410 is further configured to receive configuration information of a plurality of user groups. The processing unit 420 is configured to switch the multicast mode used by the network device to send the downlink data to the terminal device to the unicast mode according to the third information and the configuration information of the multiple user groups.

Optionally, the communication unit 410 is further configured to: receive downlink data in a unicast mode by using the configuration information in a multicast mode.

Optionally, the multiple user groups have at least one of corresponding CSI thresholds, RSRP thresholds, RSRQ thresholds, SINR thresholds, BLER thresholds, and BER thresholds.

Optionally, the communication unit 410 is further configured to receive fourth indication information sent by the network device, where the fourth indication information is used to instruct the terminal device to release the configuration information of the terminal device in the multicast mode, or to instruct the terminal device to suspend. Multicast transmission.

Optionally, in some embodiments, the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip. The aforementioned processing unit may be one or more processors.

It should be understood that the terminal device 400 according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 400 are respectively for realizing the above-mentioned method embodiments. For the sake of brevity, the corresponding process of the terminal device will not be repeated here.

FIG. 5 shows a schematic block diagram of a network device 500 according to an embodiment of the present application. As shown in FIG. 5 , the network device 500 includes: a communication unit 510 configured to: receive first information, where the first information is used to determine when the network device sends downlink data to the terminal device by multicasting, the first information to which the terminal device belongs. a user group. The configuration information of the first user group is sent to the terminal device.

Optionally, the configuration information is carried in dedicated signaling.

Optionally, the communication unit 510 is further configured to: receive second information, where the second information is used to switch the user group to which the terminal device belongs, or the second information is used to use the network device to send downlink data to the terminal device. Switch from unicast to multicast. Send first indication information to the terminal device, where the first indication information is used to indicate the second user group after the terminal device is switched.

Optionally, the communication unit 510 is further configured to: send configuration information of multiple user groups to the terminal device, where the configuration information of the multiple user groups and the first indication information are used for the terminal device to receive downlink data.

Optionally, the first indication information is carried in DCI or MAC CE.

Optionally, the communication unit 510 is further configured to: send the configuration information of multiple user groups to the terminal device, and the second information and the configuration information of multiple user groups are used to switch the user group to which the terminal device belongs, or, connect the network The unicast mode used by the device to send downlink data to the terminal device is switched to the multicast mode.

Optionally, when the second information is used to switch the unicast mode used by the network device to send downlink data to the terminal device to the multicast mode, the communication unit 510 is further configured to: send the second indication information to the terminal device, the second The indication information is used to instruct the terminal device to release the configuration information of the terminal device in the unicast mode, or to instruct the terminal device to suspend unicast transmission.

Optionally, the second information includes at least one of the following: CSI of a serving cell of the terminal device. RSRP of the serving cell of the terminal device. The RSRQ of the serving cell of the terminal device. SINR of the serving cell of the terminal device. The SIR of the serving cell of the terminal device. BLER or BER of the multicast service. Indication information used to indicate the user group that the terminal device expects to switch to.

Optionally, the communication unit 510 is further configured to: receive third information, where the third information is used to switch the multicast mode used by the network device to send the downlink data to the terminal device to the unicast mode. Send third indication information to the terminal device, where the third indication information is used to instruct the network device to switch the multicast mode used for sending downlink data to the terminal device to the unicast mode.

Optionally, the third indication information is carried in DCI or MAC CE.

Optionally, the communication unit 510 is further configured to: send configuration information of multiple user groups to the terminal device, and the third information and the configuration information of multiple user groups are used for multicasting the network device to send downlink data to the terminal device. switch to unicast mode.

Optionally, the third information includes at least one of the following: CSI of a serving cell of the terminal device. RSRP of the serving cell of the terminal device. The RSRQ of the serving cell of the terminal device. SINR of the serving cell of the terminal device.

The SIR of the serving cell of the terminal device. BLER or BER of the multicast service.

Optionally, the communication unit 510 is further configured to: send fourth indication information to the terminal device, where the fourth indication information is used to instruct the terminal device to release the configuration information of the terminal device in the multicast mode, or to instruct the terminal device to suspend. Multicast transmission.

Optionally, the communication unit 510 is further configured to: when the network device determines that no terminal device in the first user group receives the downlink data of the multicast service, send fourth indication information to the terminal device.

It should be understood that the network device 500 according to the embodiment of the present application may correspond to the network device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the network device 500 are for realizing the above-mentioned method embodiments respectively. The corresponding process of the network device is not repeated here for brevity.

FIG. 6 is a schematic structural diagram of a communication device 800 provided by an embodiment of the present application. The communication device 800 shown in FIG. 6 includes a processor 810, and the processor 810 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 6 , the communication device 800 may further include a memory 820 . The processor 810 may call and run a computer program from the memory 820 to implement the methods in the embodiments of the present application.

The memory 820 may be a separate device independent of the processor 810 , or may be integrated in the processor 810 .

Optionally, as shown in FIG. 6 , the communication device 800 may further include a transceiver 830, and the processor 810 may control the transceiver 830 to communicate with other devices, specifically, may send information or data to other devices, or receive other Information or data sent by a device.

Among them, the transceiver 830 may include a transmitter and a receiver. The transceiver 830 may further include antennas, and the number of the antennas may be one or more.

Optionally, the communication device 800 may specifically be the network device in this embodiment of the present application, and the communication device 800 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For brevity, details are not repeated here. .

Optionally, the communication device 800 may specifically be the mobile terminal/terminal device in the embodiments of the present application, and the communication device 800 may implement the corresponding processes implemented by the mobile terminal/terminal device in each method in the embodiments of the present application. , and will not be repeated here.

FIG. 7 is a schematic structural diagram of an apparatus according to an embodiment of the present application. The apparatus 900 shown in FIG. 7 includes a processor 910, and the processor 910 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 7 , the apparatus 900 may further include a memory 920 . The processor 910 may call and run a computer program from the memory 920 to implement the methods in the embodiments of the present application.

The memory 920 may be a separate device independent of the processor 910 , or may be integrated in the processor 910 .

Optionally, the apparatus 900 may further include an input interface 930 . The processor 910 may control the input interface 930 to communicate with other devices or chips, and specifically, may acquire information or data sent by other devices or chips.

Optionally, the apparatus 900 may further include an output interface 940 . The processor 910 may control the output interface 940 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

Optionally, the apparatus can be applied to the network equipment in the embodiments of the present application, and the apparatus can implement the corresponding processes implemented by the network equipment in each method of the embodiments of the present application, and for brevity, details are not repeated here.

Optionally, the apparatus can be applied to the mobile terminal/terminal equipment in the embodiments of the present application, and the apparatus can implement the corresponding processes implemented by the mobile terminal/terminal equipment in each method of the embodiments of the present application. For brevity, here No longer.

Optionally, the device mentioned in the embodiment of the present application may also be a chip. For example, it can be a system-on-chip, a system-on-a-chip, a system-on-a-chip, or a system-on-a-chip.

FIG. 8 is a schematic block diagram of a communication system 1000 provided by an embodiment of the present application. As shown in FIG. 8 , the communication system 1000 includes a terminal device 1010 and a network device 1020 .

The terminal device 1010 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1020 can be used to implement the corresponding functions implemented by the network device in the above method. For brevity, details are not repeated here. .

It should be understood that the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software. The above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Programming logic devices, discrete gate or transistor logic devices, discrete hardware components. The methods, steps, and logic block diagrams disclosed in the embodiments of this application can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Wherein, the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory may be Random Access Memory (RAM), which acts as an external cache. By way of illustration and not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

It should be understood that the above memory is an example but not a limitative description, for example, the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

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

Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For brevity, here No longer.

Optionally, the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application. , and are not repeated here for brevity.

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

Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in each method of the embodiments of the present application. Repeat.

Optionally, the computer program product can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, For brevity, details are not repeated here.

The embodiments of the present application also provide a computer program.

Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity. , and will not be repeated here.

Optionally, the computer program may be applied to the mobile terminal/terminal device in the embodiments of the present application, and when the computer program is run on the computer, the mobile terminal/terminal device implements the various methods of the computer program in the embodiments of the present application. The corresponding process, for the sake of brevity, will not be repeated here.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus 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 may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

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

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

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. For such understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

A wireless communication method, comprising:

The terminal device sends first information to the network device, where the first information is used to determine the first user group to which the terminal device belongs when the network device sends downlink data to the terminal device in a multicast manner;

The terminal device receives configuration information of the first user group.
The method according to claim 1, wherein the first information includes at least one of the following: a measurement result of the terminal device, a quality of service (QoS) of a multicast service subscribed by the terminal device, the multicast The priority of the service on the terminal device side.
The method according to claim 2, wherein the measurement result of the terminal device is any one of the following: a measurement result of the terminal device in a connected state, a measurement result of the terminal device in an idle state, The measurement result of the terminal device in the inactive state.
The method according to claim 3, wherein the measurement result of the terminal device in the connected state includes at least one of the following:

the reference signal received power RSRP of the serving cell of the terminal device;

the reference signal reception quality RSRQ of the serving cell of the terminal device;

the signal-to-interference-plus-noise ratio SINR of the serving cell of the terminal device;

the signal-to-interference ratio SIR of the serving cell of the terminal device;

the RSRP of the same-frequency neighbor cell of the serving cell;

the RSRQ of the same-frequency neighbor cell of the serving cell;

the SINR of the same-frequency neighbor cell of the serving cell;

the SIR of the same-frequency neighbor cell of the serving cell;

RSRP of inter-frequency neighboring cells of the serving cell;

the RSRQ of the inter-frequency neighboring cells of the serving cell;

the SINR of the inter-frequency neighboring cells of the serving cell;

the SIR of the inter-frequency neighboring cells of the serving cell;

RSRPs of other cells belonging to different systems from the serving cell;

RSRQs of other cells belonging to different systems from the serving cell;

SINRs of other cells belonging to different systems from the serving cell;

SIRs of other cells belonging to different systems from the serving cell.
The method according to claim 3 or 4, wherein the measurement result of the terminal device in an idle state or an inactive state includes at least one of the following:

RSRP of the cell where the terminal equipment resides;

the RSRQ of the cell where the terminal equipment resides;

the SINR of the cell where the terminal equipment resides;

the SIR of the cell where the terminal equipment resides;

RSRP of the same-frequency neighbor cell of the camping cell;

the RSRQ of the same-frequency neighbor cell of the camping cell;

the SINR of the same-frequency neighbor cell of the camping cell;

the SIR of the same-frequency neighbor cell of the camping cell;

RSRP of inter-frequency neighboring cells of the camped cell;

the RSRQ of the inter-frequency neighboring cells of the camping cell;

the SINR of the inter-frequency neighboring cells of the camping cell;

the SIR of the inter-frequency neighboring cells of the camping cell;

RSRP of other cells belonging to different systems from the camping cell;

RSRQs of other cells belonging to different systems from the camping cell;

the SINR of other cells belonging to different systems from the camping cell;

SIRs of other cells belonging to different systems from the camping cell.
The method according to any one of claims 1-5, wherein the configuration information is carried in dedicated signaling.
The method according to claim 6, wherein the dedicated signaling is radio resource control (RRC) connection reconfiguration signaling.
The method according to any one of claims 1-7, wherein the configuration information includes at least one of the following: a group-wireless network temporary identifier G-RNTI, a temporary mobility group identifier TMGI, a configuration of a search space, a group Part of the bandwidth BWP configuration of the broadcast service.
The method according to any one of claims 1-8, further comprising:

The terminal device sends second information to the network device, where the second information is used to switch the user group to which the terminal device belongs, or the second information is used to send the network device to the network device. The unicast mode used by the terminal equipment to send downlink data is switched to the multicast mode;

The terminal device receives first indication information, where the first indication information is used to indicate the second user group after the terminal device is switched.
The method of claim 9, further comprising:

The terminal device receives configuration information of multiple user groups;

The terminal device receives downlink data according to the configuration information of the multiple user groups and the first indication information.
The method according to claim 9 or 10, wherein the first indication information is carried in downlink control signaling DCI or medium access control control element MAC CE.
The method according to any one of claims 1-8, wherein,

The terminal device receives configuration information of multiple user groups;

The terminal device switches the user group to which the terminal device belongs according to the second information and the configuration information of the multiple user groups, or uses the unicast method used by the network device to send downlink data to the terminal device. switch to multicast mode.
The method according to any one of claims 9-12, wherein the second information is used when switching a unicast mode used by the network device to send downlink data to the terminal device to a multicast mode , the method also includes:

The terminal device receives the second indication information sent by the network device, where the second indication information is used to instruct the terminal device to release the configuration information of the terminal device in the unicast mode, or is used to instruct the terminal device The end device suspends unicast transmission.
The method according to any one of claims 9-13, wherein the second information includes at least one of the following:

Channel state information CSI of the serving cell of the terminal device;

RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

the SINR of the serving cell of the terminal device;

the SIR of the serving cell of the terminal device;

The block error rate BLER or the bit error rate BER of the multicast service;

Indication information used to indicate the user group to which the terminal device expects to be switched.
The method according to any one of claims 1-8, further comprising:

sending, by the terminal device, third information to the network device, where the third information is used to switch the multicast mode used by the network device to send downlink data to the terminal device to a unicast mode;

The terminal device receives third indication information, where the third indication information is used to instruct the network device to switch the multicast mode used for sending downlink data to the terminal device to the unicast mode.
The method according to claim 15, wherein the third indication information is carried in DCI or MAC CE.
The method according to any one of claims 1-8, wherein,

The terminal device receives configuration information of multiple user groups;

The terminal device switches the multicast mode used by the network device to send the downlink data to the terminal device to the unicast mode according to the third information and the configuration information of the multiple user groups.
The method according to any one of claims 15-17, further comprising:

The terminal device receives the downlink data in the unicast mode by using the configuration information in the multicast mode.
The method according to any one of claims 15-18, wherein the third information includes at least one of the following:

the CSI of the serving cell of the terminal device;

RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

the SINR of the serving cell of the terminal device;

the SIR of the serving cell of the terminal device;

BLER or BER of the multicast service.
The method according to claim 12 or 17, wherein the multiple user groups have at least one of corresponding CSI thresholds, RSRP thresholds, RSRQ thresholds, SINR thresholds, BLER thresholds, and BER thresholds.
The method according to any one of claims 1-20, further comprising:

The terminal device receives fourth indication information sent by the network device, where the fourth indication information is used to instruct the terminal device to release the configuration information of the terminal device in the multicast mode, or is used to instruct the terminal device The end device suspends the multicast transmission.
A wireless communication method, comprising:

The network device receives first information, where the first information is used to determine the first user group to which the terminal device belongs when the network device sends downlink data to the terminal device in a multicast manner;

The network device sends the configuration information of the first user group to the terminal device.
The method according to claim 22, wherein the first information includes at least one of the following: a measurement result of the terminal device, a QoS of a multicast service subscribed by the terminal device, and the multicast service in The priority of the terminal device side.
The method according to claim 23, wherein the measurement result of the terminal device is any one of the following: a measurement result of the terminal device in a connected state, a measurement result of the terminal device in an idle state, The measurement result of the terminal device in the inactive state.
The method according to claim 24, wherein the measurement result of the terminal device in the connected state includes at least one of the following:

RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

the SINR of the serving cell of the terminal device;

the SIR of the serving cell of the terminal device;

the RSRP of the same-frequency neighbor cell of the serving cell;

the RSRQ of the same-frequency neighbor cell of the serving cell;

the SINR of the same-frequency neighbor cell of the serving cell;

the SIR of the same-frequency neighbor cell of the serving cell;

RSRP of inter-frequency neighboring cells of the serving cell;

the RSRQ of the inter-frequency neighboring cells of the serving cell;

the SINR of the inter-frequency neighboring cells of the serving cell;

the SIR of the inter-frequency neighboring cells of the serving cell;

RSRPs of other cells belonging to different systems from the serving cell;

RSRQs of other cells belonging to different systems from the serving cell;

SINRs of other cells belonging to different systems from the serving cell;

SIRs of other cells belonging to different systems from the serving cell.
The method according to claim 24 or 25, wherein the measurement result of the terminal device in an idle state or an inactive state includes at least one of the following:

RSRP of the cell where the terminal equipment resides;

the RSRQ of the cell where the terminal equipment resides;

the SINR of the cell where the terminal equipment resides;

the SIR of the cell where the terminal equipment resides;

RSRP of the same-frequency neighbor cell of the camping cell;

the RSRQ of the same-frequency neighbor cell of the camping cell;

the SINR of the same-frequency neighbor cell of the camping cell;

the SIR of the same-frequency neighbor cell of the camping cell;

RSRP of inter-frequency neighboring cells of the camped cell;

the RSRQ of the inter-frequency neighboring cells of the camping cell;

the SINR of the inter-frequency neighboring cells of the camping cell;

the SIR of the inter-frequency neighboring cells of the camping cell;

RSRP of other cells belonging to different systems from the camping cell;

RSRQs of other cells belonging to different systems from the camping cell;

the SINR of other cells belonging to different systems from the camping cell;

SIRs of other cells belonging to different systems from the camping cell.
The method according to any one of claims 22-26, wherein the configuration information is carried in dedicated signaling.
The method of claim 27, wherein the dedicated signaling is RRC connection reconfiguration signaling.
The method according to any one of claims 23-28, wherein the configuration information includes at least one of the following: G-RNTI, TMGI, configuration of search space, and BWP configuration of multicast service.
The method according to any one of claims 22-29, further comprising:

The network device receives second information, where the second information is used to switch the user group to which the terminal device belongs, or the second information is used to send downlink data from the network device to the terminal device The unicast mode used is switched to the multicast mode;

The network device sends first indication information to the terminal device, where the first indication information is used to indicate the second user group after the terminal device is switched.
The method of claim 30, further comprising:

The network device sends configuration information of multiple user groups to the terminal device, where the configuration information of the multiple user groups and the first indication information are used for the terminal device to receive downlink data.
The method according to claim 30 or 31, wherein the first indication information is carried in DCI or MAC CE.
The method according to any one of claims 22-29, wherein,

The network device sends configuration information of multiple user groups to the terminal device, and the second information and the configuration information of the multiple user groups are used to switch the user group to which the terminal device belongs, or, The unicast mode used by the network device to send the downlink data to the terminal device is switched to the multicast mode.
The method according to any one of claims 30-33, wherein the second information is used when switching a unicast mode used by the network device to send downlink data to the terminal device to a multicast mode , the method also includes:

Second indication information sent by the network device to the terminal device, where the second indication information is used to instruct the terminal device to release the configuration information of the terminal device in the unicast mode, or is used to instruct the terminal device The end device suspends unicast transmission.
The method according to any one of claims 30-34, wherein the second information includes at least one of the following:

Channel state information CSI of the serving cell of the terminal device;

RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

the SINR of the serving cell of the terminal device;

the SIR of the serving cell of the terminal device;

The block error rate BLER or the bit error rate BER of the multicast service;

Indication information used to indicate the user group to which the terminal device expects to be switched.
The method according to any one of claims 22-29, further comprising:

receiving, by the network device, third information, where the third information is used to switch the multicast mode used by the network device to send downlink data to the terminal device to a unicast mode;

The network device sends third indication information to the terminal device, where the third indication information is used to instruct the network device to switch the multicast mode used for sending downlink data to the terminal device to a unicast mode.
The method according to claim 36, wherein the third indication information is carried in DCI or MAC CE.
The method according to any one of claims 22-29, wherein,

The network device sends configuration information of multiple user groups to the terminal device, and the third information and the configuration information of the multiple user groups are used to set the group used by the network device to send downlink data to the terminal device. Switch the broadcast mode to the unicast mode.
The method according to any one of claims 36-38, wherein the third information includes at least one of the following:

the CSI of the serving cell of the terminal device;

RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

the SINR of the serving cell of the terminal device;

the SIR of the serving cell of the terminal device;

BLER or BER of the multicast service.
The method according to claim 33 or 38, wherein the multiple user groups have corresponding at least one of CSI threshold, RSRP threshold, RSRQ threshold, SINR threshold, BLER threshold, and BER threshold.
The method according to any one of claims 22-40, further comprising:

The network device sends fourth indication information to the terminal device, where the fourth indication information is used to instruct the terminal device to release the configuration information of the terminal device in the multicast mode, or is used to instruct the terminal The device suspends multicast transmission.
The method of claim 41, wherein:

When the network device determines that no terminal device in the first user group receives the downlink data of the multicast service, the network device sends the fourth indication information to the terminal device.
A terminal device, characterized in that it includes: a communication unit for:

sending first information to the network device, where the first information is used to determine the first user group to which the terminal device belongs when the network device sends downlink data to the terminal device in a multicast manner;

Configuration information of the first user group is received.
The terminal device according to claim 43, wherein the first information includes at least one of the following: a measurement result of the terminal device, a QoS of a multicast service subscribed by the terminal device, the multicast service Priority on the side of the terminal device.
The terminal device according to claim 44, wherein the measurement result of the terminal device is any one of the following: a measurement result of the terminal device in a connected state, a measurement result of the terminal device in an idle state , the measurement result of the terminal device in the inactive state.
The terminal device according to claim 45, wherein the measurement result of the terminal device in the connected state includes at least one of the following:

RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

the SINR of the serving cell of the terminal device;

the SIR of the serving cell of the terminal device;

the RSRP of the same-frequency neighbor cell of the serving cell;

the RSRQ of the same-frequency neighbor cell of the serving cell;

the SINR of the same-frequency neighbor cell of the serving cell;

the SIR of the same-frequency neighbor cell of the serving cell;

RSRP of inter-frequency neighboring cells of the serving cell;

the RSRQ of the inter-frequency neighboring cells of the serving cell;

the SINR of the inter-frequency neighboring cells of the serving cell;

the SIR of the inter-frequency neighboring cells of the serving cell;

RSRPs of other cells belonging to different systems from the serving cell;

RSRQs of other cells belonging to different systems from the serving cell;

SINRs of other cells belonging to different systems from the serving cell;

SIRs of other cells belonging to different systems from the serving cell.
The terminal device according to claim 45 or 46, wherein a measurement result of the terminal device in an idle state or an inactive state includes at least one of the following:

RSRP of the cell where the terminal equipment resides;

the RSRQ of the cell where the terminal equipment resides;

the SINR of the cell where the terminal equipment resides;

the SIR of the cell where the terminal equipment resides;

RSRP of the same-frequency neighbor cell of the camping cell;

the RSRQ of the same-frequency neighbor cell of the camping cell;

the SINR of the same-frequency neighbor cell of the camping cell;

the SIR of the same-frequency neighbor cell of the camping cell;

RSRP of inter-frequency neighboring cells of the camped cell;

the RSRQ of the inter-frequency neighboring cells of the camping cell;

the SINR of the inter-frequency neighboring cells of the camping cell;

the SIR of the inter-frequency neighboring cells of the camping cell;

RSRP of other cells belonging to different systems from the camping cell;

RSRQs of other cells belonging to different systems from the camping cell;

the SINR of other cells belonging to different systems from the camping cell;

SIRs of other cells belonging to different systems from the camping cell.
The terminal device according to any one of claims 43-47, wherein the configuration information is carried in dedicated signaling.
The terminal device according to claim 48, wherein the dedicated signaling is RRC connection reconfiguration signaling.
The terminal device according to any one of claims 43-49, wherein the configuration information includes at least one of the following: G-RNTI, TMGI, configuration of search space, and BWP configuration of multicast service.
The terminal device according to any one of claims 43-50, wherein the communication unit is further configured to:

Send second information to the network device, where the second information is used to switch the user group to which the terminal device belongs, or the second information is used to send the network device to the terminal device in downlink The unicast mode used by the data is switched to the multicast mode;

First indication information is received, where the first indication information is used to indicate the second user group after switching by the terminal device.
The terminal device according to claim 51, wherein the communication unit is further configured to:

Receive configuration information for multiple user groups;

Receive downlink data according to the configuration information of the multiple user groups and the first indication information.
The terminal device according to claim 51 or 52, wherein the first indication information is carried in DCI or MAC CE.
The terminal device according to any one of claims 43-50, further comprising: a processing unit;

The communication unit is further configured to receive configuration information of multiple user groups;

The processing unit is configured to switch the user group to which the terminal device belongs according to the second information and the configuration information of the multiple user groups, or use the network device to send downlink data to the terminal device. Switch from unicast to multicast.
The terminal device according to any one of claims 51-54, wherein the second information is used to switch a unicast mode used by the network device to send downlink data to the terminal device to a multicast mode , the communication unit is also used for:

Receive second indication information sent by the network device, where the second indication information is used to instruct the terminal device to release the configuration information of the terminal device in the unicast mode, or used to instruct the terminal device to suspend Unicast transmission.
The terminal device according to any one of claims 51-55, wherein the second information includes at least one of the following:

the CSI of the serving cell of the terminal device;

RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

the SINR of the serving cell of the terminal device;

the SIR of the serving cell of the terminal device;

BLER or BER of multicast service;

Indication information used to indicate the user group to which the terminal device expects to be switched.
The terminal device according to any one of claims 43-50, wherein the communication unit is further configured to:

sending third information to the network device, where the third information is used to switch the multicast mode used by the network device to send downlink data to the terminal device to a unicast mode;

Receive third indication information, where the third indication information is used to instruct the network device to switch the multicast mode used for sending downlink data to the terminal device to the unicast mode.
The terminal device according to claim 57, wherein the third indication information is carried in DCI or MAC CE.
The terminal device according to any one of claims 43-50, further comprising: a processing unit;

The communication unit is further configured to receive configuration information of multiple user groups;

The processing unit is configured to switch the multicast mode used by the network device to send the downlink data to the terminal device to the unicast mode according to the third information and the configuration information of the multiple user groups.
The terminal device according to any one of claims 57-59, wherein the communication unit is further configured to:

The configuration information in multicast mode is used to receive downlink data in unicast mode.
The terminal device according to any one of claims 57-60, wherein the third information includes at least one of the following:

the CSI of the serving cell of the terminal device;

RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

the SINR of the serving cell of the terminal device;

the SIR of the serving cell of the terminal device;

BLER or BER of the multicast service.
The terminal device according to claim 54 or 59, wherein the multiple user groups have at least one of corresponding CSI thresholds, RSRP thresholds, RSRQ thresholds, SINR thresholds, BLER thresholds, and BER thresholds.
The terminal device according to any one of claims 43-62, wherein,

The communication unit is further configured to receive fourth indication information sent by the network device, where the fourth indication information is used to instruct the terminal device to release the configuration information of the terminal device in the multicast mode, or, for The terminal device is instructed to suspend multicast transmission.
A network device, comprising: a communication unit for:

receiving first information, where the first information is used to determine the first user group to which the terminal device belongs when the network device sends downlink data to the terminal device in a multicast manner;

The configuration information of the first user group is sent to the terminal device.
The network device according to claim 64, wherein the first information comprises at least one of the following: a measurement result of the terminal device, a QoS of a multicast service subscribed by the terminal device, the multicast service Priority on the side of the terminal device.
The network device according to claim 65, wherein the measurement result of the terminal device is any one of the following: a measurement result of the terminal device in a connected state, a measurement result of the terminal device in an idle state , the measurement result of the terminal device in the inactive state.
The network device according to claim 66, wherein the measurement result of the terminal device in the connected state includes at least one of the following:

RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

the SINR of the serving cell of the terminal device;

the SIR of the serving cell of the terminal device;

the RSRP of the same-frequency neighbor cell of the serving cell;

the RSRQ of the same-frequency neighbor cell of the serving cell;

the SINR of the same-frequency neighbor cell of the serving cell;

the SIR of the same-frequency neighbor cell of the serving cell;

RSRP of inter-frequency neighboring cells of the serving cell;

the RSRQ of the inter-frequency neighboring cells of the serving cell;

the SINR of the inter-frequency neighboring cells of the serving cell;

the SIR of the inter-frequency neighboring cells of the serving cell;

RSRPs of other cells belonging to different systems from the serving cell;

RSRQs of other cells belonging to different systems from the serving cell;

SINRs of other cells belonging to different systems from the serving cell;

SIRs of other cells belonging to different systems from the serving cell.
The network device according to claim 66 or 67, wherein the measurement result of the terminal device in an idle state or an inactive state includes at least one of the following:

RSRP of the cell where the terminal equipment resides;

the RSRQ of the cell where the terminal equipment resides;

the SINR of the cell where the terminal equipment resides;

the SIR of the cell where the terminal equipment resides;

RSRP of the same-frequency neighbor cell of the camping cell;

the RSRQ of the same-frequency neighbor cell of the camping cell;

the SINR of the same-frequency neighbor cell of the camping cell;

the SIR of the same-frequency neighbor cell of the camping cell;

RSRP of inter-frequency neighboring cells of the camped cell;

the RSRQ of the inter-frequency neighboring cells of the camping cell;

the SINR of the inter-frequency neighboring cells of the camping cell;

the SIR of the inter-frequency neighboring cells of the camping cell;

RSRP of other cells belonging to different systems from the camping cell;

RSRQs of other cells belonging to different systems from the camping cell;

the SINR of other cells belonging to different systems from the camping cell;

SIRs of other cells belonging to different systems from the camping cell.
The network device according to any one of claims 64-68, wherein the configuration information is carried in dedicated signaling.
The network device of claim 69, wherein the dedicated signaling is RRC connection reconfiguration signaling.
The network device according to any one of claims 65-70, wherein the configuration information includes at least one of the following: G-RNTI, TMGI, search space configuration, and BWP configuration of multicast services.
The network device according to any one of claims 64-71, wherein the communication unit is further configured to:

Receive second information, where the second information is used to switch the user group to which the terminal device belongs, or the second information is used to use the single unit used by the network device to send downlink data to the terminal device. Switch the broadcast mode to the multicast mode;

Send first indication information to the terminal device, where the first indication information is used to indicate the second user group after the terminal device is switched.
The network device according to claim 72, wherein the communication unit is further configured to:

The configuration information of multiple user groups is sent to the terminal device, and the configuration information of the multiple user groups and the first indication information are used for the terminal device to receive downlink data.
The network device according to claim 72 or 73, wherein the first indication information is carried in DCI or MAC CE.
The network device according to any one of claims 64-71, wherein the communication unit is further configured to:

Send the configuration information of multiple user groups to the terminal device, and the second information and the configuration information of the multiple user groups are used to switch the user group to which the terminal device belongs, or send the network device to the user group. The unicast mode used by the terminal equipment to send the downlink data is switched to the multicast mode.
The network device according to any one of claims 72-75, wherein the second information is used to switch a unicast mode used by the network device to send downlink data to the terminal device to a multicast mode , the communication unit is also used for:

Second indication information sent to the terminal device, where the second indication information is used to instruct the terminal device to release the configuration information of the terminal device in the unicast mode, or used to instruct the terminal device to suspend Unicast transmission.
The network device according to any one of claims 72-76, wherein the second information includes at least one of the following:

the CSI of the serving cell of the terminal device;

RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

the SINR of the serving cell of the terminal device;

the SIR of the serving cell of the terminal device;

BLER or BER of multicast service;

Indication information for indicating the user group to which the terminal device expects to be switched.
The network device according to any one of claims 64-71, wherein the communication unit is further configured to:

receiving third information, where the third information is used to switch the multicast mode used by the network device to send the downlink data to the terminal device to the unicast mode;

Send third indication information to the terminal device, where the third indication information is used to instruct the network device to switch the multicast mode used for sending downlink data to the terminal device to the unicast mode.
The network device according to claim 78, wherein the third indication information is carried in DCI or MAC CE.
The network device according to any one of claims 64-71, wherein the communication unit is further configured to:

Send the configuration information of multiple user groups to the terminal device, and the third information and the configuration information of the multiple user groups are used to switch the multicast mode used by the network device to send downlink data to the terminal device to Unicast mode.
The network device according to any one of claims 78-80, wherein the third information includes at least one of the following:

the CSI of the serving cell of the terminal device;

RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

the SINR of the serving cell of the terminal device;

the SIR of the serving cell of the terminal device;

BLER or BER of the multicast service.
The network device according to claim 75 or 80, wherein the multiple user groups have at least one of corresponding CSI thresholds, RSRP thresholds, RSRQ thresholds, SINR thresholds, BLER thresholds, and BER thresholds.
The network device according to any one of claims 64-82, wherein the communication unit is further configured to:

Send fourth indication information to the terminal device, where the fourth indication information is used to instruct the terminal device to release the configuration information of the terminal device in the multicast mode, or to instruct the terminal device to suspend the group broadcast transmission.
The network device according to claim 83, wherein the communication unit is further configured to:

When the network device determines that no terminal device in the first user group receives the downlink data of the multicast service, it sends the fourth indication information to the terminal device.
A terminal device, characterized in that it comprises: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute any one of claims 1 to 21. one of the methods described.
A network device, characterized in that it comprises: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute any one of claims 22 to 42. one of the methods described.
A chip, characterized by comprising: a processor for calling and running a computer program from a memory, so that a device installed with the chip executes the method according to any one of claims 1 to 21.
A chip, characterized by comprising: a processor for invoking and running a computer program from a memory, so that a device on which the chip is installed executes the method according to any one of claims 22 to 42.
A computer-readable storage medium, characterized by being used for storing a computer program, the computer program causing a computer to execute the method according to any one of claims 1 to 21.
A computer-readable storage medium, characterized by being used for storing a computer program, the computer program causing a computer to execute the method according to any one of claims 22 to 42.
A computer program product comprising computer program instructions, the computer program instructions causing a computer to perform the method of any one of claims 1 to 21.
A computer program product comprising computer program instructions, the computer program instructions causing a computer to perform the method of any one of claims 22 to 42.
A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1 to 21 .
A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 22 to 42.