CN115516881A

CN115516881A - Wireless communication method, terminal equipment and network equipment

Info

Publication number: CN115516881A
Application number: CN202080100697.3A
Authority: CN
Inventors: 王淑坤
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2022-12-23
Also published as: WO2022006852A1

Abstract

The embodiment of the application provides a wireless communication method, terminal equipment and network equipment, wherein the method comprises the following steps: the method comprises the steps that a terminal device sends 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 mode; the terminal device receives the configuration information of the first user group, so that the consumption of wireless resources can be reduced.

Description

Wireless communication method, terminal equipment and network equipment

Technical Field

The embodiments of the present application relate to the field of communications, and in particular, to a wireless communication method, a terminal device, and a network device.

Background

In a New Radio (NR) system, for a Multicast Service (MBS), a network device may send downlink data of the MBS Service to a terminal device in a Multicast manner, and may also send downlink data of the MBS Service in a unicast manner for a terminal device with poor channel quality or poor channel capacity. Therefore, when there are a large number of terminal devices with poor channel quality or poor capability in a cell, the network device needs to transmit downlink data in a unicast manner for the terminal devices, and a large number of unicast transmissions will consume radio resources.

Disclosure of Invention

The embodiment of the application provides a wireless communication method, terminal equipment and network equipment, so that the consumption of wireless resources can be reduced.

In a first aspect, a wireless communication method is provided, and the method includes: the method comprises the steps that a terminal device sends 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 mode; the terminal device receives configuration information of the first user group.

In a second aspect, a wireless communication method is provided, the method comprising: the network equipment receives first information, wherein the first information is used for determining a first user group to which the terminal equipment belongs when the network equipment sends downlink data to the terminal equipment in a multicast mode; the network device sends configuration information of the first user group to the terminal device.

In a third aspect, a terminal device is provided, configured to perform the method in the first aspect or each implementation manner thereof.

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

In a fourth aspect, a network device is provided for performing the method of the second aspect or its implementation manners.

In particular, the network device comprises functional modules for performing the methods of the second aspect or its implementations described above.

In a fifth aspect, a terminal device is provided that includes 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, and executing the method in the first aspect or each implementation manner thereof.

In a sixth aspect, a network device is provided that includes 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, and executing the method of the second aspect or each implementation mode thereof.

In a seventh aspect, an apparatus is provided for implementing the method in any one of the first to second aspects or implementations thereof.

Specifically, the apparatus includes: a processor configured to call and run the computer program from the memory, so that the apparatus on which the apparatus is installed performs the method according to any one of the first aspect to the second aspect or the implementation manner thereof.

In an eighth aspect, there is provided a computer readable storage medium for storing a computer program, the computer program causing a computer to perform the method of any one of the first to second aspects or implementations thereof.

In a ninth aspect, there is provided a computer program product comprising computer program instructions to cause a computer to perform the method of any one of the first to second aspects or implementations thereof.

A tenth aspect provides a computer program that, when run on a computer, causes the computer to perform the method of any one of the first to second aspects or implementations thereof.

Through the technical solutions of the first aspect or the second aspect, unicast transmission may be reduced, for example, for terminal devices with poor channel quality or poor capability, the terminal devices may be divided into one or more user groups, and the network device may send downlink data to the terminal devices in a multicast manner, so as to reduce consumption of wireless resources.

Drawings

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

fig. 2 is an interaction flow diagram of a wireless communication method according to an embodiment of the present application;

fig. 3 is a schematic diagram of user group division provided in the present application;

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

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

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

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without making any creative effort with respect to the embodiments in the present application belong to the protection scope of the present application.

The embodiment of the application can be applied to various communication systems, such as: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an Advanced Long Term Evolution (LTE-a) System, an NR System, an Evolution System of an NR System, an LTE (LTE-based Access to unlicensed spectrum, LTE-U) System on an unlicensed spectrum, an NR-based Access to unlicensed spectrum, an NR-U System, a Universal Mobile telecommunications System (Universal Mobile telecommunications, UMTS) System, a Wireless Local Area Network (WLAN) System, a Wireless Local Area network (WiFi) System, and other Wireless communication systems.

Generally, the conventional Communication system supports a limited number of connections and is easy to implement, however, with the development of Communication technology, the mobile Communication system will support not only conventional Communication but also, for example, device-to-Device (D2D) Communication, machine-to-Machine (M2M) Communication, machine Type Communication (MTC), and Vehicle-to-Vehicle (V2V) Communication, and the embodiments of the present application can also be applied to these Communication systems.

Optionally, the communication system in the embodiment of the present application may be applied to a Carrier Aggregation (CA) scenario, may also be applied to a Dual Connectivity (DC) scenario, and may also be applied to an independent (SA) networking scenario.

The frequency spectrum of the application is not limited in the embodiment of the present application. For example, the embodiments of the present application may be applied to a licensed spectrum and may also be applied to an unlicensed spectrum.

For example, a communication system 100 applied in the embodiment of the present application 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). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area.

Fig. 1 exemplarily shows one network device and two terminal devices, and optionally, the communication system 100 may include a plurality of network devices and may include other numbers of terminal devices within the coverage of each network device, which is not limited in this embodiment of the present application.

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

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

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

The embodiments of the present application have been described with reference to a terminal device and a network device, where: a terminal device may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment, etc. The terminal device may be a Station (ST) in a WLAN, and may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, and a next generation communication system, for example, a terminal device in an NR Network or a terminal device in a future-evolution Public Land Mobile Network (PLMN) Network, and the like.

By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment, is the general term of applying wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application function, and need to be matched with other equipment such as a smart phone for use, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.

The network device may be a device for communicating with a mobile device, and the network device may be an Access Point (AP) in a WLAN, a Base Station (BTS) in GSM or CDMA, a Base Station (NodeB, NB) in WCDMA, an evolved Node B (eNB, eNodeB) in LTE, a relay Station or an Access Point, or a network device or a Base Station (gNB) in a vehicle-mounted device, a wearable device and an NR network, or a network device in a PLMN network for future evolution.

In this embodiment of the present application, a network device provides a service for a cell, and a terminal device communicates with the network device through a transmission resource (for example, a frequency domain resource or a spectrum resource) used by the cell, where the cell may be a cell corresponding to the network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a Small cell (Small cell), where the Small cell may include: urban cells (Metro cells), micro cells (Micro cells), pico cells (Pico cells), femto cells (Femto cells), and the like, and the small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-rate data transmission services.

Before introducing the technical scheme of the application, the following first introduces the characteristics of the MBMS service and the MBS service:

the International Telecommunications Union (ITU) defines three broad application scenarios for fifth generation (5 generation,5 g) mobile communication systems and future mobile communication systems: enhanced Mobile Broadband (eMBB), high-reliability Low-Latency Communications (URLLC), and massive Machine Type Communications (mtc). Typical eMBB services are: ultra high definition video, augmented Reality (AR), virtual Reality (VR), etc., which are mainly characterized by large transmission data volume and high transmission rate. Typical URLLC services are: the main characteristics of the applications of wireless control in industrial manufacturing or production processes, motion control of unmanned automobiles and unmanned airplanes, and haptic interaction such as remote repair and remote operation are that ultra-high reliability, low time delay, less transmission data volume and burstiness are required. Typical mtc traffic is: the intelligent power distribution automation, smart city etc. main characteristics are that networking equipment quantity is huge, transmission data volume is less, data are insensitive to transmission delay, and these mMTC terminals need satisfy the demand of low-cost and very long standby time.

A large amount of mobile data multimedia services and various high bandwidth multimedia services, such as Internet Protocol Television (IPTV) and mobile Television (TV), provide highly robust and extremely important communication services, such as: multicast communication in case of disaster, public safety network, etc. put higher demands on multicast/broadcast/multicast services. These mobile data multimedia services require that multiple users can receive the same data at the same time, and compared with general data services, the mobile data multimedia services have the characteristics of large data volume, long duration, time delay sensitivity and the like. At present, the third Generation Partnership project (3 rd Generation Partnership project,3 gpp) proposes a Multimedia Broadcast Multicast Service (MBMS), supports provision of a Multicast/Broadcast/Multicast network in a cellular system, is a technology for transmitting data from one data source to a plurality of terminal devices, realizes resource sharing between a core network and an access network, and thus improves the utilization rate of network resources. The MBMS service defined by 3GPP can implement not only plain text low-rate message-like multicast and broadcast, but also broadcast and multicast of high-speed multimedia service, so as to provide users with a variety of rich video, audio and multimedia services. The characteristics of the broadcast service enable better efficiency in sending information of public interest, which undoubtedly follows the trend of future mobile data development and provides better service prospects for the development of communication technology.

At present, for a Packet Data Unit (PDU) session (session) of an MBS service, a shared GPRS Tunneling Protocol (GTP) tunnel is used between a 5G Core network (5G Core network,5 gc) and a gNB to transmit an MBMS service, that is, both a unicast service and a multicast service in a cell share the GTP tunnel.

The MBS service is a typical service in the MBMS, and as described above, in the NR system, for the MBS service, the network device may send the downlink data of the MBS service to the terminal device in a multicast manner, and may also send the downlink data of the MBS service in a unicast manner for the terminal device with poor channel quality or poor capability. Therefore, when there are a large number of terminal devices with poor channel quality or poor capability in a cell, the network device needs to transmit downlink data in a unicast manner for the terminal devices, and a large number of unicast transmissions will waste radio resources.

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

The technical solution of the present application is described in detail by specific examples below.

Fig. 2 is an interaction flowchart of a wireless communication method according to an embodiment of the present application, where 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 configuration information of the first user group to the terminal device.

The following describes step S210 in detail:

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 mode. Namely, the first information is information used by the network device for user group division of the terminal device.

Optionally, the first information comprises at least one of: the measurement result of the terminal device, the 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: a measurement result of the terminal device in a CONNECTED state (RRC _ CONNECTED), a measurement result of the terminal device in an IDLE state (RRC _ IDLE), and a measurement result of the terminal device in an INACTIVE state (RRC _ INACTIVE).

The measurement in the RRC _ IDLE state serves for cell reselection, and paging of the terminal device in the RRC _ IDLE state is initiated by the core network side, a paging area is also configured by the core network side, the Access network side does not have an Access Stratum (AS) context of the terminal device, and the terminal device in the RRC _ IDLE state does not have Radio Resource Control (RRC).

The terminal device in the RRC _ IDLE state has an RRC connection, the AS context of the terminal device exists on both the access network side and the terminal device side, and the access network side determines that the location of the terminal device is at a cell level. Unicast data may be transmitted between the end device and the network device.

The measurement in 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 RRC _ INACTIVE state exists on a certain network device, paging is triggered by the RAN, the RAN manages a paging area based on the RAN, and the network side knows that the location of the UE is 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 (RSRP) of a serving cell of a terminal device. Reference Signal Received Quality (RSRQ) of a serving cell of a terminal device. Signal to Interference plus Noise Ratio (SINR) of the serving cell of the terminal device. Signal Interference Ratio (SIR) of the serving cell of the terminal device. RSRP of co-frequency neighbor cells of the serving cell. RSRQ of co-frequency neighbor cells of the serving cell. SINR of co-frequency neighbor cells of the serving cell. SIR of the co-frequency neighbor cell of the serving cell. RSRP of the inter-frequency neighbor cell of the serving cell. RSRQ of the inter-frequency neighbor cell of the serving cell. SINR of the inter-frequency neighbor cell of the serving cell. SIR of the inter-frequency neighbor cell of the serving cell. RSRP of other cells belonging to different systems than the serving cell. RSRQ of other cells belonging to a different system than the serving cell. SINR of other cells belonging to different systems from the serving cell. SIR of other cells belonging to different systems from 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 camping cell of the terminal device. RSRQ of the camping cell of the terminal device. SINR of the camping cell of the terminal device. SIR of the camping cell of the terminal device. And the RSRP of the co-frequency neighbor cells of the resident cell. And RSRQ of the same-frequency neighbor cell of the resident cell. And SINR of the co-frequency neighbor cells of the resident cell. SIR of the co-frequency neighbor cell of the camping cell. And RSRP of the pilot neighbor cell of the resident cell. And RSRQ of the pilot frequency neighbor cell of the resident cell. And SINR of the different-frequency neighbor cell of the resident cell. SIR of the pilot neighbor cell of the camping cell. RSRP of other cells belonging to different systems than the camping cell. RSRQ of other cells belonging to a different system than the camped cell. SINR of other cells belonging to different systems from the camping cell. SIR of other cells belonging to different systems from the camping cell.

Optionally, for a terminal device, it may carry multiple services, each service having a corresponding priority. The priority level corresponding to each service may be configured by a network device, or may be determined by a terminal device according to its own capability or type, which is not limited in the present application.

Optionally, after the network device receives the first information, the network device may determine, according to the first information, a user group to which the terminal device belongs, 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, for each user group, corresponding at least one of the following information: a measurement result threshold, a QoS threshold of the service, and a priority threshold of the service.

Illustratively, RSRP thresholds of the serving cells of the terminal devices configured by the network device for the user group a are RSRP1 to RSRP2, i.e. when the RSRP of the serving cell of a terminal device is between RSRP1 and RSRP2, the terminal device is classified into the user group a. The RSRP threshold of the serving cell of the terminal device configured by the network device for the user group B is RSRP3 to RSRP4, that is, when the RSRP of the serving cell of a certain terminal device is between RSRP3 and RSRP4, the terminal device is divided into user group B. The RSRP thresholds of the serving cells of the terminal devices 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.

Illustratively, the QoS threshold of the service of the terminal device configured by the network device for the user group a is QoS1 to QoS2, that is, when the QoS of the service of a certain terminal device is between QoS1 and QoS2, the terminal device is divided into the user group a. The QoS threshold of the service of the terminal device configured by the network device for the user group B is QoS3 to QoS4, that is, when the QoS of the service of a certain terminal device is between QoS3 and QoS4, the terminal device is divided into the user group B. The QoS threshold of the service of the terminal device configured by the network device for the user group C is QoS5 to QoS6, that is, when the QoS of the service of a certain terminal device is between QoS5 and QoS6, the terminal device is divided into the user group C.

Illustratively, the priority threshold of the service configured by the network device for the user group a is from priority 1 to priority 2, i.e. when the service of a certain terminal device is prioritized between priority 1 and priority 2, the terminal device is classified into the user group a. The priority threshold of the service of the terminal device configured by the network device for the user group B is priority 3 to priority 4, that is, when the priority of the service of a certain terminal device is between priority 3 and priority 4, the terminal device is divided into the user group B. The priority threshold of the service of the terminal device configured by the network device for the user group C is priority 5 to priority 6, that is, when the priority of the service of a certain terminal device is between priority 5 and priority 6, the terminal device is divided into the user group C.

Fig. 3 is a schematic diagram illustrating user group division provided in the present application, and as shown in fig. 3, the network device divides UE1 and UE2 into a user group, i.e., user group 1, according to respective first information of UE3 and UE4, divides the user group into another user group, i.e., 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 (5 GC) and the gNB to transmit the MBMS service, that is, the GTP tunnel is shared in both the unicast service and the multicast service in the cell.

Optionally, when the first information of the terminal device meets a higher requirement, the network device may send downlink data of the multicast service to the terminal device in a unicast manner, for example: the RSRP of the serving cell of the terminal device is smaller than the minimum RSRP corresponding to the user group. 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 may send the downlink data of the multicast service to the terminal device in a unicast manner.

The following describes step S220 in detail:

optionally, the configuration information of the first user group is used for the terminal device 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 comprises at least one of: group-Radio Network Temporary Identity (G-RNTI), temporary Mobile Group Identity (TMGI), configuration of search space, and configuration of partial Bandwidth (BWP) of multicast service.

The G-RNTI is used for scrambling a Physical Downlink Control Channel (PDCCH) for scheduling a Downlink Shared Physical Channel (PDSCH) for a multicast service.

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

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

Optionally, on each element carrier, a terminal device may configure 4 BWPs at most, but only one is in an active state at a certain time. The active BWP indicates the working bandwidth used by the terminal device within the working bandwidth of the cell, and the terminal device does not receive PDSCH, PDCCH, etc. outside the BWP.

To sum up, in the present application, the network device may divide the corresponding user group for the terminal device according to the first information of the terminal device, and provide the configuration information of the user group to which the terminal device belongs for the terminal device, so that the terminal device can receive the multicast service through the configuration information of the user group to which the terminal device belongs. In this way, unicast transmission can be reduced, for example, for such terminal devices with poor channel quality or poor capability, they may be divided into one or more user groups, and the network device may send downlink data to such terminal devices in a multicast manner, so as to reduce consumption of wireless resources.

Since the first information of the terminal device may change dynamically, for example, the measurement result of the terminal device may change, based on which, the user group to which the terminal device belongs currently is not necessarily the most suitable user group, the network device may switch user groups for the terminal device, or the terminal device may switch user groups by itself, so that the terminal device may be divided into the most suitable user groups. Or, the network device itself provides the multicast service to the terminal device in a unicast manner, and because the first information of the terminal device may change dynamically, for example, a measurement result of the terminal device may change, based on which, the network device needs to switch the unicast manner to the multicast manner to provide the multicast service to the terminal device. Or, the network device itself provides the multicast service to the terminal device in a multicast manner, and because the first information of the terminal device may change dynamically, for example, a measurement result of the terminal device may change, based on which, the network device needs to switch the multicast manner to a unicast manner to provide the multicast service to the terminal device. Specifically, the following embodiments are used to describe the user group switching or the switching of the transmission modes of the multicast service:

example 1: and the terminal equipment sends the second information to the network equipment. And the network equipment switches the user group to which the terminal equipment belongs according to the second information, or switches a unicast mode adopted by the network equipment for sending downlink data to the terminal equipment to a multicast mode. And the network equipment sends first indication information to the terminal equipment, wherein the first indication information is used for indicating the second user group switched by the terminal equipment.

Optionally, the second information comprises at least one of: channel State Information (CSI) of a serving cell of the terminal device, and RSRP of the serving cell of the terminal device. RSRQ of the serving cell of the terminal device. SINR of the serving cell of the terminal device. SIR of the serving cell of the terminal device. Block Error Rate (BLER) or Bit Error Rate (BER) for multicast traffic. Indication information for indicating the user group to which the terminal device desires to be handed over.

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

Optionally, after the network device determines that the second information of the terminal device satisfies information corresponding to a certain user group, the network device switches the terminal device to the user group that the terminal device satisfies, that is, the second user group, where when the terminal device originally belongs to the first user group, the network device switches the terminal device from the first user group to the second user group, and when the terminal device originally receives downlink data of a multicast service in a unicast manner, the network device switches the terminal device from the unicast manner to the multicast manner and switches the terminal device 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 does not currently determine the information corresponding to the user group that is satisfied by the second information of the terminal device, the network device does not perform user group switching or does not perform switching from a unicast mode to a multicast mode.

Illustratively, when the network device determines that the CSI of the serving cell of the terminal device is between CSI 1-CSI 2, and the CSI 1-CSI 2 range corresponds to user group a, the network device switches to user group a. When the network device determines that the CSI of the serving cell of the terminal device is between CSI3 to CSI4, and the CSI3 to CSI4 range corresponds to user group B, the network device switches to user group B. When the network device determines that the CSI of the serving cell of the terminal device is between CSI5 and CSI6, and the CSI5 to CSI6 range corresponds to the user group C, the network device switches to the user group C.

Alternatively, the first indication information may be an identifier of the second user group.

Optionally, the terminal device may receive configuration information of a plurality of user groups, as described above, the configuration information of each user group including at least one of: G-RNTI, TMGI, search space configuration and BWP configuration of multicast service.

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

Optionally, the first indication information is carried in Downlink Control Information (DCI) or a Media Access Control Element (MAC CE).

Optionally, when 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 terminal device further receives second indication information sent by the network device, where the second indication information is used to instruct the terminal device to release configuration information of the terminal device in the unicast mode, or to instruct the terminal device to suspend unicast transmission. After the terminal device suspends unicast transmission, when the terminal device subsequently receives downlink data in a unicast mode, the terminal device may reactivate unicast transmission, that is, receive the downlink data using the configuration information in the unicast mode.

Example 2: the terminal device receives configuration information of a plurality of user groups. And the terminal equipment switches the user group to which the terminal equipment belongs according to the second information and the configuration information of the plurality of user groups, or switches a unicast mode adopted by the network equipment for sending the downlink data to the terminal equipment to a multicast mode.

Optionally, when the terminal device switches the unicast mode adopted by the network device to send the downlink data to the terminal device to the multicast mode, the terminal device further receives the second indication information sent by the network device. After the terminal device suspends unicast transmission, when the terminal device subsequently receives downlink data in a unicast mode, the terminal device may reactivate unicast transmission, that is, receive the downlink data using the configuration information in the unicast mode.

Example 2 differs from example 1 in that: embodiment 2 is that a terminal device implements user group switching or transmission mode switching, and embodiment 1 is that a network device implements user group switching or transmission mode switching. Therefore, in embodiment 2, reference may be made to the specific implementation manner of embodiment 1, and the content thereof is not described herein again.

Example 3: and the network equipment switches the multicast mode adopted by the network equipment for sending the downlink data to the terminal equipment to the unicast mode according to the third information. And the network equipment sends third indication information to the terminal equipment, wherein the third indication information is used for indicating that the multicast mode adopted by the network equipment for sending the downlink data to the terminal equipment is switched to the unicast mode.

Optionally, the third information comprises at least one of: CSI of the serving cell of the terminal device. RSRP of the serving cell of the terminal device. RSRQ of the serving cell of the terminal device. SINR of the serving cell of the terminal device. SIR of the serving cell of the terminal device. BLER or BER for multicast traffic.

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

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.

Illustratively, 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 the downlink data by using configuration information in a unicast manner. Or the terminal equipment receives the downlink data in a unicast mode by adopting the configuration information in the multicast mode.

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

Example 4: the terminal device receives configuration information of a plurality of user groups. And the terminal equipment switches the multicast mode adopted by the network equipment for sending the downlink data to the terminal equipment to the unicast mode according to the third information and the configuration information of the user groups.

Example 4 is different from example 3 in that: embodiment 4 is that the terminal device implements user group switching or transmission mode switching, and embodiment 3 is that the network device implements user group switching or transmission mode switching. Therefore, in embodiment 4, reference may be made to the specific implementation manner of embodiment 3, and the content thereof is not described herein again.

It should be noted that, when the network device determines that the user group to which the network device belongs currently, for example, 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. The fourth indication information is used for indicating the terminal device to release the configuration information of the terminal device in the multicast mode, or indicating the terminal device to suspend multicast transmission. After the terminal device suspends the multicast transmission, when the terminal device subsequently receives the downlink data in the multicast mode, the terminal device may reactivate the multicast transmission, that is, receive the downlink data by using the configuration information in the multicast mode.

In summary, in the present application, a terminal device or a network device may switch the terminal device to a suitable user group, or may switch a transmission mode in which the terminal device receives a multicast service, such as switching from a multicast mode to a unicast mode, or switching from a unicast mode to a multicast mode.

Method embodiments of the present application are described in detail above in conjunction with fig. 2 and 3, and apparatus embodiments of the present application are described in detail below in conjunction with fig. 4-8, it being understood that apparatus embodiments correspond to method embodiments and that similar descriptions may be made with reference to method embodiments.

Fig. 4 shows a schematic block diagram of a terminal device 400 according to an embodiment of the application. As shown in fig. 4, the terminal apparatus 400 includes: a communication unit 410 for: and sending first information to the network equipment, wherein the first information is used for determining a first user group to which the terminal equipment belongs when the network equipment sends downlink data to the terminal equipment in a multicast mode. Configuration information for a first group of users is received.

Optionally, the first information comprises at least one of: the measurement result of the terminal equipment, the QoS of the multicast service signed by the terminal equipment and the priority of the multicast service on the terminal equipment side.

Optionally, the measurement result of the terminal device is any one of: the measurement result of the terminal equipment in a connection state, the measurement result of the terminal equipment in an idle state and the measurement result of the terminal equipment 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. RSRQ of the serving cell of the terminal device. SINR of the serving cell of the terminal device. SIR of the serving cell of the terminal device. RSRP of co-frequency neighbor cells of the serving cell. RSRQ of co-frequency neighbor cells of the serving cell. SINR of co-frequency neighbor cells of the serving cell. SIR of the co-frequency neighbor cell of the serving cell. RSRP of the inter-frequency neighbor cell of the serving cell. RSRQ of the inter-frequency neighbor cell of the serving cell. SINR of the inter-frequency neighbor cell of the serving cell. SIR of the inter-frequency neighbor cell of the serving cell. RSRP of other cells belonging to different systems than the serving cell. RSRQ of other cells belonging to a different system than the serving cell. SINR of other cells belonging to a different system from the serving cell. SIR of other cells belonging to different systems from 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 camping cell of the terminal device. RSRQ of the camping cell of the terminal device. SINR of the camping cell of the terminal device. SIR of the camping cell of the terminal device. And RSRP of the same-frequency neighbor cells of the resident cell. And RSRQ of the same-frequency neighbor cell of the resident cell. SINR of the same-frequency neighbor cell of the resident cell. SIR of the co-frequency neighbor cell of the camping cell. And the RSRP of the pilot frequency neighbor cell of the resident cell. And RSRQ of the pilot adjacent cell of the resident cell. And SINR of the different-frequency neighbor cell of the resident cell. SIR of the inter-cell neighbor of the camping cell. RSRP of other cells belonging to different systems than the camping cell. RSRQ of other cells belonging to a different system than the camping cell. SINR of other cells belonging to different systems from the camping cell. SIR of other cells belonging to different systems from the camping cell.

Optionally, the configuration information is carried in dedicated signaling.

Optionally, the dedicated signaling is RRC connection reconfiguration signaling.

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

Optionally, the communication unit 410 is further configured to: and sending second information to the network equipment, wherein the second information is used for switching the user group to which the terminal equipment belongs, or the second information is used for switching the unicast mode adopted by the network equipment for sending the downlink data to the terminal equipment to the multicast mode. And receiving first indication information, wherein the first indication information is used for indicating the second user group after the terminal equipment is switched.

Optionally, the communication unit 410 is further configured to: configuration information for a plurality of user groups is received. And receiving downlink data according to the configuration information of the plurality of user groups and the first indication information.

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

Optionally, the method further comprises: 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 the plurality of user groups, or switch a unicast mode used by the network device to send downlink data to the terminal device to a multicast mode.

Optionally, when the second information is used to switch a unicast manner adopted by the network device to send downlink data to the terminal device to a multicast manner, the communication unit 410 is further configured to: and receiving second indication information sent by the network equipment, wherein the second indication information is used for indicating the terminal equipment to release configuration information of the terminal equipment in a unicast mode, or is used for indicating the terminal equipment to suspend unicast transmission.

Optionally, the second information comprises at least one of: CSI of the serving cell of the terminal device. RSRP of the serving cell of the terminal device. RSRQ of the serving cell of the terminal device. SINR of the serving cell of the terminal device. SIR of the serving cell of the terminal device. BLER or BER for multicast traffic. Indication information for indicating a user group to which the terminal device desires to be handed over.

Optionally, the communication unit 410 is further configured to: and sending third information to the network equipment, wherein the third information is used for switching a multicast mode adopted by the network equipment for sending the downlink data to the terminal equipment to a unicast mode. And receiving third indication information, wherein the third indication information is used for indicating that the multicast mode adopted by the network equipment for sending the downlink data to the terminal equipment is switched to the unicast mode.

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

Optionally, the method further comprises: 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, according to the third information and the configuration information of the multiple user groups, a multicast mode used by the network device to send downlink data to the terminal device to a unicast mode.

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

Optionally, the plurality of user groups have at least one of a CSI threshold, an RSRP threshold, an RSRQ threshold, an SINR threshold, a BLER threshold, and a BER threshold.

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 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 communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system on a chip. The 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 a terminal device in the embodiment of the method of the present application, and the above and other operations and/or functions of each unit in the terminal device 400 are respectively for implementing corresponding processes of the terminal device in the embodiment of the method described above, and are not described herein again for brevity.

Fig. 5 shows a schematic block diagram of a network device 500 according to an embodiment of the application. As shown in fig. 5, the network device 500 includes: a communication unit 510 for: and receiving first information, wherein the first information is used for determining a first user group to which the terminal equipment belongs when the network equipment sends downlink data to the terminal equipment in a multicast mode. And sending the configuration information of the first user group to the terminal equipment.

Optionally, the measurement result of the terminal device in the connected state includes at least one of: RSRP of the serving cell of the terminal device. RSRQ of the serving cell of the terminal device. SINR of the serving cell of the terminal device. SIR of the serving cell of the terminal device. RSRP of co-frequency neighbor cells of the serving cell. RSRQ of co-frequency neighbor cells of the serving cell. SINR of co-frequency neighbor cells of the serving cell. SIR of co-frequency neighbor cells of the serving cell. RSRP of the inter-frequency neighbor cell of the serving cell. RSRQ of the inter-frequency neighbor cell of the serving cell. SINR of the inter-frequency neighbor cell of the serving cell. SIR of the inter-frequency neighbor cell of the serving cell. RSRP of other cells belonging to different systems than the serving cell. RSRQ of other cells belonging to a different system than the serving cell. SINR of other cells belonging to different systems from the serving cell. SIR of other cells belonging to different systems from 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 camping cell of the terminal device. RSRQ of the camping cell of the terminal device. SINR of the camping cell of the terminal device. SIR of the camping cell of the terminal device. And RSRP of the same-frequency neighbor cells of the resident cell. And RSRQ of the co-frequency neighbor cells of the resident cell. SINR of the same-frequency neighbor cell of the resident cell. SIR of the co-frequency neighbor cell of the camping cell. And RSRP of the pilot neighbor cell of the resident cell. And RSRQ of the pilot adjacent cell of the resident cell. And SINR of the different-frequency neighbor cell of the resident cell. SIR of the pilot neighbor cell of the camping cell. RSRP of other cells belonging to different systems than the camping cell. RSRQ of other cells belonging to a different system than the camping cell. SINR of other cells belonging to different systems from the camping cell. SIR of other cells belonging to different systems from the camping cell.

Optionally, the configuration information is carried in dedicated signaling.

Optionally, the communication unit 510 is further configured to: and receiving second information, wherein the second information is used for switching a user group to which the terminal equipment belongs, or the second information is used for switching a unicast mode adopted by the network equipment for sending downlink data to the terminal equipment to a multicast mode. And sending first indication information to the terminal equipment, wherein the first indication information is used for indicating the second user group after the terminal equipment is switched.

Optionally, the communication unit 510 is further configured to: and sending configuration information of a plurality of user groups to the terminal equipment, wherein the configuration information of the plurality of user groups and the first indication information are used for the terminal equipment 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: and sending configuration information of a plurality of user groups to the terminal equipment, wherein the second information and the configuration information of the plurality of user groups are used for switching the user group to which the terminal equipment belongs, or switching a unicast mode adopted by the network equipment for sending downlink data to the terminal equipment to a multicast mode.

Optionally, when the second information is used to switch a unicast method used by the network device to send downlink data to the terminal device to a multicast method, the communication unit 510 is further configured to: and second indication information is sent to the terminal device, wherein the second indication information is used for indicating the terminal device to release the configuration information of the terminal device in the unicast mode, or indicating the terminal device to suspend unicast transmission.

Optionally, the second information comprises at least one of: CSI of the serving cell of the terminal device. RSRP of the serving cell of the terminal device. RSRQ of the serving cell of the terminal device. SINR of the serving cell of the terminal device. SIR of the serving cell of the terminal device. BLER or BER for multicast traffic. Indication information for indicating the user group to which the terminal device desires to be handed over.

Optionally, the communication unit 510 is further configured to: and receiving third information, wherein the third information is used for switching a multicast mode adopted by the network equipment for sending the downlink data to the terminal equipment to a unicast mode. And sending third indication information to the terminal equipment, wherein the third indication information is used for indicating that the multicast mode adopted by the network equipment for sending the downlink data to the terminal equipment is switched 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: and sending configuration information of a plurality of user groups to the terminal equipment, wherein the third information and the configuration information of the plurality of user groups are used for switching a multicast mode adopted by the network equipment for sending the downlink data to the terminal equipment to a unicast mode.

Optionally, the third information comprises at least one of: CSI of the serving cell of the terminal device. RSRP of the serving cell of the terminal device. RSRQ of the serving cell of the terminal device. SINR of the serving cell of the terminal device.

SIR of the serving cell of the terminal device. BLER or BER for multicast traffic.

Optionally, the communication unit 510 is further configured to: and sending fourth indication information to the terminal equipment, wherein the fourth indication information is used for indicating the terminal equipment to release configuration information of the terminal equipment in a multicast mode, or indicating the terminal equipment to suspend multicast transmission.

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

It should be understood that the network device 500 according to the embodiment of the present application may correspond to a network device in the method embodiment of the present application, and the foregoing and other operations and/or functions of each unit in the network device 500 are respectively for implementing corresponding processes of the network device in the method embodiment described above, and are not described herein again for brevity.

Fig. 6 is a schematic structural diagram of a communication device 800 according to an embodiment of the present application. The communication device 800 shown in fig. 6 comprises a processor 810, and the processor 810 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 6, the communication device 800 may also include a memory 820. From the memory 820, the processor 810 may call and run a computer program to implement the method in the embodiment of the present application.

The memory 820 may be a separate device from the processor 810 or may be integrated into 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, and specifically, may transmit information or data to the other devices or receive information or data transmitted by the other devices.

The transceiver 830 may include a transmitter and a receiver, among others. The transceiver 830 may further include one or more antennas.

Optionally, the communication device 800 may specifically be a network device in the embodiment of the present application, and the communication device 800 may implement a corresponding process implemented by the network device in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the communication device 800 may specifically be a mobile terminal/terminal device according to this embodiment, and the communication device 800 may implement a corresponding process implemented by the mobile terminal/terminal device in each method according to this embodiment, which is not described herein again for brevity.

Fig. 7 is a schematic configuration diagram of an apparatus of 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 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. From the memory 920, the processor 910 can call and run a computer program to implement the method in the embodiment of the present application.

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

Optionally, the apparatus 900 may further comprise an input interface 930. The processor 910 may control the input interface 930 to communicate with other devices or chips, and in particular, may obtain information or data transmitted by other devices or chips.

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

Optionally, the apparatus may be applied to the network device in the embodiment of the present application, and the apparatus may implement the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the apparatus may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the apparatus may implement the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Alternatively, the device mentioned in the embodiments of the present application may also be a chip. For example, it may be a system-on-chip, a system-on-chip or a system-on-chip, etc.

Fig. 8 is a schematic block diagram of a communication system 1000 provided in 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 may be configured to implement corresponding functions implemented by the terminal device in the foregoing method, and the network device 1020 may be configured to implement corresponding functions implemented by the network device in the foregoing method, for brevity, which will not be described again here.

It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off the shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

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

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

An embodiment of the present application further provides a computer-readable storage medium for storing a computer program.

Optionally, the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the computer-readable storage medium may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

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

Optionally, the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instruction enables the computer to execute a corresponding process implemented by the network device in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the computer program product may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program instruction causes the computer to execute a corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to the network device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the computer program may be applied to the mobile terminal/terminal device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute a corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

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

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

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

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

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

Claims

A method of wireless communication, comprising:

a terminal device sends 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 mode;

and the terminal equipment receives the configuration information of the first user group.
The method of claim 1, wherein the first information comprises at least one of: the measurement result of the terminal equipment, the QoS of the multicast service signed by the terminal equipment, and the priority of the multicast service on the terminal equipment side.
Method according to claim 2, characterized in that the measurement result of the terminal device is any of the following: the measurement result of the terminal equipment in a connection state, the measurement result of the terminal equipment in an idle state and the measurement result of the terminal equipment in a non-activated state.
The method of claim 3, wherein the measurement result of the terminal device in the connected state comprises at least one of:

a Reference Signal Received Power (RSRP) of a serving cell of the terminal equipment;

a reference signal received quality, RSRQ, of a serving cell of the terminal device;

a signal to interference plus noise ratio (SINR) of a serving cell of the terminal device;

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

RSRP of co-frequency neighbor cells of the serving cell;

RSRQ of co-frequency neighbor cells of the serving cell;

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

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

RSRP of a pilot neighbor cell of the serving cell;

RSRQ of a pilot neighbor cell of the serving cell;

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

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

RSRP of other cells belonging to a different system from the serving cell;

RSRQ of other cells belonging to a different system than the serving cell;

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

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

the RSRP of the resident cell of the terminal equipment;

the RSRQ of the resident cell of the terminal equipment;

the SINR of the resident cell of the terminal equipment;

SIR of the resident cell of the terminal equipment;

RSRP of co-frequency neighbor cells of the resident cell;

RSRQ of a same-frequency neighbor cell of the resident cell;

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

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

RSRP of the pilot frequency neighbor cell of the resident cell;

RSRQ of an inter-frequency neighbor cell of the resident cell;

SINR of the different-frequency neighbor cell of the resident cell;

SIR of the different-frequency neighbor cell of the resident cell;

RSRP of other cells belonging to a different system than the camped cell;

RSRQ of other cells belonging to different systems from the resident cell;

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

SIR of other cells belonging to different systems from the camping cell.
The method according to any of claims 1-5, wherein the configuration information is carried in dedicated signaling.
The method of claim 6, wherein the dedicated signaling is Radio Resource Control (RRC) connection reconfiguration signaling.
The method according to any of claims 1-7, wherein the configuration information comprises at least one of: the method comprises the steps of group-wireless network temporary identification G-RNTI, temporary mobile group identification TMGI, search space configuration and partial bandwidth BWP configuration of multicast service.
The method of any one of claims 1-8, further comprising:

the terminal device sends second information to the network device, wherein the second information is used for switching a user group to which the terminal device belongs, or the second information is used for switching a unicast mode adopted by the network device for sending downlink data to the terminal device to a multicast mode;

and the terminal equipment receives first indication information, wherein the first indication information is used for indicating the second user group switched by the terminal equipment.
The method of claim 9, further comprising:

the terminal equipment receives configuration information of a plurality of user groups;

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

the terminal equipment receives configuration information of a plurality of user groups;

and the terminal equipment switches the user group to which the terminal equipment belongs according to the second information and the configuration information of the user groups, or switches a unicast mode adopted by the network equipment for sending downlink data to the terminal equipment to a multicast mode.
The method according to any one of claims 9 to 12, wherein the second information is used for switching a unicast mode adopted by the network device to send downlink data to the terminal device to a multicast mode, and the method further includes:

and the terminal equipment receives second indication information sent by the network equipment, wherein the second indication information is used for indicating the terminal equipment to release configuration information of the terminal equipment in a unicast mode, or indicating the terminal equipment to suspend unicast transmission.
The method according to any one of claims 9-13, wherein the second information comprises at least one of:

channel State Information (CSI) of a serving cell of the terminal equipment;

RSRP of a serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

SINR of a serving cell of the terminal device;

an SIR of a serving cell of the terminal device;

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

and the indication information is used for indicating the user group to which the terminal equipment desires to be switched.
The method according to any one of claims 1-8, further comprising:

the terminal device sends third information to the network device, wherein the third information is used for switching a multicast mode adopted by the network device for sending downlink data to the terminal device to a unicast mode;

and the terminal equipment receives third indication information, wherein the third indication information is used for indicating that a multicast mode adopted by the network equipment for sending the downlink data to the terminal equipment is switched to a unicast mode.
The method of claim 15, wherein the third indication information is carried in DCI or MAC CE.
The method according to any one of claims 1 to 8,

the terminal equipment receives configuration information of a plurality of user groups;

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

and the terminal equipment receives the downlink data in a unicast mode by adopting the configuration information in the multicast mode.
The method according to any of claims 15-18, wherein the third information comprises at least one of:

CSI of a serving cell of the terminal device;

the RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

SINR of a serving cell of the terminal device;

an SIR of a serving cell of the terminal device;

BLER or BER for multicast traffic.
The method of claim 12 or 17, wherein the plurality of user groups have at least one of a CSI threshold, an RSRP threshold, an RSRQ threshold, an SINR threshold, a BLER threshold, and a BER threshold.
The method of any one of claims 1-20, further comprising:

and the terminal equipment receives fourth indication information sent by the network equipment, wherein the fourth indication information is used for indicating the terminal equipment to release configuration information of the terminal equipment in a multicast mode, or indicating the terminal equipment to suspend multicast transmission.
A method of wireless communication, comprising:

the method comprises the steps that network equipment receives first information, wherein the first information is used for determining a first user group to which the terminal equipment belongs when the network equipment sends downlink data to the terminal equipment in a multicast mode;

and the network equipment sends the configuration information of the first user group to the terminal equipment.
The method of claim 22, wherein the first information comprises at least one of: the measurement result of the terminal equipment, the QoS of the multicast service signed by the terminal equipment, and the priority of the multicast service at the terminal equipment side.
The method according to claim 23, characterized in that the measurement result of the terminal device is any of the following: the measurement result of the terminal equipment in a connection state, the measurement result of the terminal equipment in an idle state and the measurement result of the terminal equipment in a non-activated state.
The method of claim 24, wherein the measurement result of the terminal device in the connected state comprises at least one of:

the RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

SINR of a serving cell of the terminal device;

an SIR of a serving cell of the terminal device;

RSRP of co-frequency neighbor cells of the serving cell;

RSRQ of co-frequency neighbor cells of the serving cell;

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

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

RSRP of a pilot neighbor cell of the serving cell;

RSRQ of a pilot neighbor cell of the serving cell;

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

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

RSRP of other cells belonging to a different system from the serving cell;

RSRQ of other cells belonging to a different system than the serving cell;

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

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

the RSRP of the resident cell of the terminal equipment;

the RSRQ of the resident cell of the terminal equipment;

the SINR of the resident cell of the terminal equipment;

SIR of the resident cell of the terminal equipment;

RSRP of co-frequency neighbor cells of the resident cell;

RSRQ of a same-frequency neighbor cell of the resident cell;

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

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

RSRP of the pilot frequency neighbor cell of the resident cell;

RSRQ of an inter-frequency neighbor cell of the resident cell;

SINR of the different-frequency neighbor cell of the resident cell;

SIR of the different-frequency neighbor cell of the resident cell;

RSRP of other cells belonging to a different system than the camped cell;

RSRQ of other cells belonging to different systems from the resident cell;

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

SIR of other cells belonging to different systems from the camping cell.
The method according to any of claims 22-26, wherein said 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 of claims 23-28, wherein the configuration information comprises at least one of: G-RNTI, TMGI, search space configuration and BWP configuration of multicast service.
The method of any one of claims 22-29, further comprising:

the network equipment receives second information, wherein the second information is used for switching a user group to which the terminal equipment belongs, or the second information is used for switching a unicast mode adopted by the network equipment for sending downlink data to the terminal equipment to a multicast mode;

and the network equipment sends first indication information to the terminal equipment, wherein the first indication information is used for indicating a second user group switched by the terminal equipment.
The method of claim 30, further comprising:

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

the network device sends configuration information of a plurality of user groups to the terminal device, and the second information and the configuration information of the plurality of user groups are used for switching the user group to which the terminal device belongs, or switching a unicast mode adopted by the network device for sending downlink data to the terminal device to a multicast mode.
The method according to any one of claims 30 to 33, wherein the second information is used for switching a unicast mode adopted by the network device to send downlink data to the terminal device to a multicast mode, and the method further comprises:

and second indication information sent by the network device to the terminal device, where the second indication information is used to indicate the terminal device to release configuration information of the terminal device in a unicast mode, or to indicate the terminal device to suspend unicast transmission.
The method according to any of claims 30-34, wherein the second information comprises at least one of:

channel State Information (CSI) of a serving cell of the terminal equipment;

the RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

SINR of a serving cell of the terminal device;

an SIR of a serving cell of the terminal device;

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

and the indication information is used for indicating the user group to which the terminal equipment desires to be switched.
The method of any one of claims 22-29, further comprising:

the network equipment receives third information, wherein the third information is used for switching a multicast mode adopted by the network equipment for sending downlink data to the terminal equipment to a unicast mode;

and the network equipment sends third indication information to the terminal equipment, wherein the third indication information is used for indicating that a multicast mode adopted by the network equipment for sending downlink data to the terminal equipment is switched to a unicast mode.
The method of claim 36, wherein the third indication information is carried in DCI or MAC CE.
The method of any one of claims 22-29,

the network device sends configuration information of a plurality of user groups to the terminal device, and the third information and the configuration information of the plurality of user groups are used for switching a multicast mode adopted by the network device for sending downlink data to the terminal device to a unicast mode.
The method according to any of claims 36-38, wherein the third information comprises at least one of:

CSI of a serving cell of the terminal device;

the RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

SINR of a serving cell of the terminal device;

an SIR of a serving cell of the terminal device;

BLER or BER for multicast traffic.
The method of claim 33 or 38, wherein the plurality of user groups have at least one of a CSI threshold, an RSRP threshold, an RSRQ threshold, an SINR threshold, a BLER threshold, and a BER threshold.
The method of any one of claims 22-40, further comprising:

and the network equipment sends fourth indication information to the terminal equipment, wherein the fourth indication information is used for indicating the terminal equipment to release the configuration information of the terminal equipment in a multicast mode, or indicating the terminal equipment to suspend multicast transmission.
The method of claim 41,

and when the network equipment determines that no terminal equipment in the first user group receives downlink data of the multicast service, the network equipment sends the fourth indication information to the terminal equipment.
A terminal device, comprising: a communication unit to:

sending first information to network equipment, wherein the first information is used for determining a first user group to which the terminal equipment belongs when the network equipment sends downlink data to the terminal equipment in a multicast mode;

receiving configuration information for the first group of users.
The terminal device of claim 43, wherein the first information comprises at least one of: the measurement result of the terminal equipment, the QoS of the multicast service signed by the terminal equipment, and the priority of the multicast service on the terminal equipment side.
A terminal device according to claim 44, wherein the measurement result of the terminal device is any of: the measurement result of the terminal equipment in a connection state, the measurement result of the terminal equipment in an idle state and the measurement result of the terminal equipment in a non-activated state.
The terminal device of claim 45, wherein the measurement result of the terminal device in the connected state comprises at least one of:

the RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

SINR of a serving cell of the terminal device;

an SIR of a serving cell of the terminal device;

RSRP of co-frequency neighbor cells of the serving cell;

RSRQ of co-frequency neighbor cells of the serving cell;

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

SIR of co-frequency neighbor cells of the serving cell;

RSRP of a pilot neighbor cell of the serving cell;

RSRQ of an inter-frequency neighbor cell of the serving cell;

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

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

RSRP of other cells belonging to a different system than the serving cell;

RSRQ of other cells belonging to a different system than the serving cell;

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

SIR of other cells belonging to different systems than the serving cell.
The terminal device according to claim 45 or 46, wherein the measurement result of the terminal device in idle or inactive state comprises at least one of:

the RSRP of the resident cell of the terminal equipment;

the RSRQ of the resident cell of the terminal equipment;

the SINR of the resident cell of the terminal equipment;

SIR of the resident cell of the terminal equipment;

RSRP of co-frequency neighbor cells of the resident cell;

RSRQ of a same-frequency neighbor cell of the resident cell;

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

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

RSRP of the pilot neighboring cell of the resident cell;

RSRQ of an inter-frequency neighbor cell of the resident cell;

SINR of the different-frequency neighbor cell of the resident cell;

SIR of the different frequency adjacent cell of the resident cell;

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

RSRQ of other cells belonging to different systems from the resident cell;

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

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

sending second information to the network device, where the second information is used to switch a user group to which the terminal device belongs, or 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;

and receiving first indication information, wherein the first indication information is used for indicating the second user group after the terminal equipment is switched.
The terminal device of claim 51, wherein the communication unit is further configured to:

receiving configuration information of a plurality of user groups;

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

the communication unit is further configured to receive configuration information of a plurality of 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 plurality of user groups, or switch a unicast mode used by the network device to send downlink data to the terminal device to a multicast mode.
The terminal device according to any one of claims 51 to 54, wherein when the second information is used to switch a unicast method used by the network device to send downlink data to the terminal device to a multicast method, the communication unit is further configured to:

and receiving second indication information sent by the network equipment, wherein the second indication information is used for indicating the terminal equipment to release configuration information of the terminal equipment in a unicast mode, or indicating the terminal equipment to suspend unicast transmission.
The terminal device according to any of claims 51-55, wherein the second information comprises at least one of:

CSI of a serving cell of the terminal device;

the RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

SINR of a serving cell of the terminal device;

an SIR of a serving cell of the terminal device;

BLER or BER of multicast service;

indication information for indicating a user group to which the terminal device desires to be handed over.
The terminal device according to any 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 a multicast mode used by the network device to send downlink data to the terminal device to a unicast mode;

and receiving third indication information, where the third indication information is used to indicate that a multicast mode adopted by the network device to send downlink data to the terminal device is switched to a unicast mode.
The terminal device of claim 57, wherein the third indication information is carried in DCI or MAC CE.
The terminal device according to any of claims 43-50, further comprising: a processing unit;

the communication unit is further configured to receive configuration information of a plurality of user groups;

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

and receiving the downlink data in a unicast mode by adopting the configuration information in the multicast mode.
The terminal device according to any of claims 57-60, wherein the third information comprises at least one of:

CSI of a serving cell of the terminal device;

the RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

SINR of a serving cell of the terminal device;

an SIR of a serving cell of the terminal device;

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

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

receiving first information, 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 mode;

and sending the configuration information of the first user group to the terminal equipment.
The network device of claim 64, wherein the first information comprises at least one of: the measurement result of the terminal equipment, the QoS of the multicast service signed by the terminal equipment, and the priority of the multicast service on the terminal equipment side.
The network device of claim 65, wherein the measurement result of the terminal device is any one of: the measurement result of the terminal equipment in a connection state, the measurement result of the terminal equipment in an idle state and the measurement result of the terminal equipment in a non-activated state.
The network device of claim 66, wherein the measurement results of the terminal device in the connected state comprise at least one of:

the RSRP of the serving cell of the terminal device;

RSRQ of a serving cell of the terminal device;

SINR of a serving cell of the terminal device;

an SIR of a serving cell of the terminal device;

RSRP of co-frequency neighbor cells of the serving cell;

RSRQ of co-frequency neighbor cells of the serving cell;

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

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

RSRP of a pilot neighbor cell of the serving cell;

RSRQ of a pilot neighbor cell of the serving cell;

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

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

RSRP of other cells belonging to a different system than the serving cell;

RSRQ of other cells belonging to a different system than the serving cell;

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

SIR of other cells belonging to different systems than the serving cell.
The network device of claim 66 or 67, wherein the measurement result of the terminal device in the idle state or the inactive state comprises at least one of:

the RSRP of the resident cell of the terminal equipment;

the RSRQ of the resident cell of the terminal equipment;

the SINR of the resident cell of the terminal equipment;

SIR of the resident cell of the terminal equipment;

RSRP of co-frequency neighbor cells of the resident cell;

RSRQ of a same-frequency neighbor cell of the resident cell;

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

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

RSRP of the pilot frequency neighbor cell of the resident cell;

RSRQ of an inter-frequency neighbor cell of the resident cell;

SINR of the different-frequency neighbor cell of the resident cell;

SIR of the different frequency adjacent cell of the resident cell;

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

RSRQ of other cells belonging to different systems from the resident cell;

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

SIR of other cells belonging to different systems from the camping cell.
The network device of any 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 of any one of claims 65-70, wherein the configuration information comprises at least one of: G-RNTI, TMGI, search space configuration and BWP configuration of multicast service.
The network device of any of claims 64-71, wherein the communication unit is further configured to:

receiving second information, where the second information is used to switch a user group to which the terminal device belongs, or 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;

and sending first indication information to the terminal equipment, wherein the first indication information is used for indicating the second user group after the terminal equipment is switched.
The network device of claim 72, wherein the communication unit is further configured to:

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

and sending configuration information of a plurality of user groups to the terminal equipment, wherein the second information and the configuration information of the plurality of user groups are used for switching the user group to which the terminal equipment belongs, or switching a unicast mode adopted by the network equipment for sending downlink data to the terminal equipment to a multicast mode.
The network device according to any one of claims 72 to 75, wherein the second information is configured to, when switching a unicast method used by the network device to send downlink data to the terminal device to a multicast method, the communication unit is further configured to:

and second indication information is sent to the terminal device, where the second indication information is used to indicate the terminal device to release configuration information of the terminal device in a unicast mode, or to indicate the terminal device to suspend unicast transmission.
The network device of any of claims 72-76, wherein the second information comprises at least one of:

CSI of a serving cell of the terminal device;

the RSRP of the serving cell of the terminal device;

RSRQ of a serving cell of the terminal device;

SINR of a serving cell of the terminal device;

an SIR of a serving cell of the terminal device;

BLER or BER of multicast service;

and the indication information is used for indicating the user group to which the terminal equipment desires to be switched.
The network device of any of claims 64-71, wherein the communication unit is further configured to:

receiving third information, wherein the third information is used for switching a multicast mode adopted by the network equipment for sending downlink data to the terminal equipment to a unicast mode;

and sending third indication information to the terminal equipment, wherein the third indication information is used for indicating that a multicast mode adopted by the network equipment for sending the downlink data to the terminal equipment is switched to a unicast mode.
The network device of claim 78, wherein the third indication information is carried in DCI or MAC CE.
The network device of any of claims 64-71, wherein the communication unit is further configured to:

and sending configuration information of a plurality of user groups to the terminal equipment, wherein the third information and the configuration information of the plurality of user groups are used for switching a multicast mode adopted by the network equipment for sending downlink data to the terminal equipment to a unicast mode.
The network device of any of claims 78-80, wherein the third information comprises at least one of:

CSI of a serving cell of the terminal device;

the RSRP of the serving cell of the terminal device;

the RSRQ of the serving cell of the terminal device;

SINR of a serving cell of the terminal device;

an SIR of a serving cell of the terminal device;

BLER or BER for multicast traffic.
The network device of claim 75 or 80, wherein the plurality of user groups have at least one of a CSI threshold, an RSRP threshold, an RSRQ threshold, an SINR threshold, a BLER threshold, and a BER threshold corresponding thereto.
The network device of any one of claims 64-82, wherein the communication unit is further configured to:

and sending fourth indication information to the terminal device, where the fourth indication information is used to indicate the terminal device to release configuration information of the terminal device in a multicast mode, or is used to indicate the terminal device to suspend multicast transmission.
The network device of claim 83, wherein the communication unit is further configured to:

and when the network equipment determines that no terminal equipment in the first user group receives downlink data of the multicast service, the network equipment sends the fourth indication information to the terminal equipment.
A terminal device, comprising: a processor and a memory for storing a computer program, the processor being configured to invoke and execute the computer program stored in the memory to perform the method of any of claims 1 to 21.
A network device, comprising: a processor and a memory for storing a computer program, the processor being configured to invoke and execute the computer program stored in the memory to perform the method of any of claims 22 to 42.
A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 1 to 21.
A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 22 to 42.
A computer-readable storage medium for storing a computer program which causes a computer to perform the method of any one of claims 1 to 21.
A computer-readable storage medium for storing a computer program which causes a computer to perform the method of any one of claims 22 to 42.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 21.
A computer program product comprising computer program instructions to cause 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 of claims 22 to 42.