Wireless communication methods and communication devices

Abstract

Provided are wireless communication methods and communication devices. A wireless communication method comprises: a terminal device receiving first information sent by a base station, wherein the first information is used for indicating a first service area of a multicast or broadcast service. In the embodiments of the present application, the base station can send the first information to the terminal device to indicate the first service area (such as a part of a cell) of the multicast or broadcast service, thereby facilitating accurate control of a data transmission range of the multicast or broadcast service.

Description

Wireless communication method and communication device Technical Field

[0001] The present application relates to the field of communication technology, and more particularly, to a wireless communication method and a communication device. Background Art

[0002] To control the data transmission range of multicast or broadcast services, wireless cellular networks have introduced the concept of a service area for multicast or broadcast services. In related technologies, a service area is typically represented by a list of cells. Accordingly, a base station can transmit data for a multicast or broadcast service within the cells indicated by the service area.

[0003] However, some cells have relatively large coverage areas, such as non-terrestrial networks (NTN) cells, whose diameters can reach hundreds or even thousands of kilometers. The service area of ​​a multicast or broadcast service may be part of a cell (for example, the service area of ​​a multicast or broadcast service is smaller than the coverage area of ​​an NTN cell). If the above-mentioned transmission method of a multicast or broadcast service is adopted, the base station will transmit the data of the multicast or broadcast service within the range of a cell (such as an NTN cell), which may result in inaccurate data transmission range of the multicast or broadcast service.

[0004] Summary of the Invention

[0005] The present application provides a wireless communication method and a communication device. The following introduces various aspects involved in the present application.

[0006] In a first aspect, a wireless communication method is provided, including: a terminal device receives first information sent by a base station, where the first information is used to indicate a first service area of ​​a multicast or broadcast service.

[0007] In a second aspect, a wireless communication method is provided, including: a base station sending first information to a terminal device, wherein the first information is used to indicate a first service area of ​​a multicast or broadcast service.

[0008] According to a third aspect, a wireless communication method is provided, comprising: a core network element sending second information to a base station, wherein the second information is used to indicate a service area of ​​a multicast or broadcast service, and the first information is irrelevant to a cell of the base station.

[0009] In a fourth aspect, a communication device is provided, which is a terminal device, and includes: a first receiving unit, used to receive first information sent by a base station, where the first information is used to indicate a first service area of ​​a multicast or broadcast service.

[0010] In a fifth aspect, a communication device is provided, which is a base station, and includes: a first sending unit, configured to send first information to a terminal device, wherein the first information is used to indicate a first service area of ​​a multicast or broadcast service.

[0011] In the sixth aspect, a communication device is provided, which is a core network device, and the communication device includes: a sending unit, used to send second information to a base station, the second information is used to indicate a service area of ​​a multicast or broadcast service, and the first information is not related to the cell of the base station.

[0012] In the seventh aspect, a communication device is provided, comprising a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the communication device executes the method as described in any one of the first to third aspects.

[0013] In an eighth aspect, a device is provided, comprising a processor for calling a program from a memory so that the device executes a method as described in any one of the first to third aspects.

[0014] In a ninth aspect, a chip is provided, comprising a processor for calling a program from a memory so that a device equipped with the chip executes a method as described in any one of the first to third aspects.

[0015] In a tenth aspect, a computer-readable storage medium is provided, on which a program is stored, wherein the program enables a computer to execute the method as described in any one of the first to third aspects.

[0016] In the eleventh aspect, a computer program product is provided, characterized in that it includes a program, and the program enables a computer to execute the method as described in any one of the first to third aspects.

[0017] In a twelfth aspect, a computer program is provided, which enables a computer to execute the method as described in any one of the first to third aspects.

[0018] In an embodiment of the present application, the base station can send first information to the terminal device to indicate the first service area of ​​the multicast or broadcast service (such as a partial area of ​​a cell), thereby helping to accurately control the data transmission range of the multicast or broadcast service. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a diagram illustrating an example of a system architecture of a wireless communication system to which an embodiment of the present application may be applied.

[0020] FIG2 is a schematic diagram of a process for initiating a multicast or broadcast service according to an embodiment of the present application.

[0021] FIG3 is a flow chart of a wireless communication method provided in one embodiment of the present application.

[0022] FIG4 is a schematic diagram of a service area provided by an embodiment of the present application.

[0023] FIG5 is a flow chart of a wireless communication method provided in another embodiment of the present application.

[0024] FIG6 is a flowchart of a wireless communication method provided in yet another embodiment of the present application.

[0025] FIG7 is a flowchart of a wireless communication method provided in another embodiment of the present application.

[0026] FIG8 is a schematic diagram of the structure of a communication device provided in one embodiment of the present application.

[0027] FIG9 is a schematic structural diagram of a communication device provided in another embodiment of the present application.

[0028] FIG10 is a schematic structural diagram of a communication device provided in yet another embodiment of the present application.

[0029] FIG. 11 is a schematic diagram of a device to which an embodiment of the present application can be applied. DETAILED DESCRIPTION

[0030] The technical solution in this application will be described below with reference to the accompanying drawings.

[0031] Communication system architecture

[0032] Figure 1 illustrates a wireless communication system 100 used in an embodiment of the present application. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide communication coverage for a specific geographic area and may communicate with the terminal device 120 within the coverage area.

[0033] FIG1 exemplarily shows a network device and two terminals. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0034] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0035] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0036] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application may refer to a device that provides voice and / or data connectivity to a user and can be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in V2X or D2D, etc. For example, a cellular phone and a car communicate with each other using sidelink signals. The cellular phone and smart home devices communicate without relaying the communication signal through the base station.

[0037] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station can broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. A base station can also refer to a communication module, a modem or a chip used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in device-to-device D2D, vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the network equipment.

[0038] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0039] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device includes a CU and a DU. The gNB may also include an AAU.

[0040] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0041] It should be understood that all or part of the functions of the communication device in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).

[0042] NTN

[0043] Currently, 3GPP is researching NTN technology. NTN generally uses satellite communications to provide communication services to users on the ground. Compared to terrestrial communication networks (for example, ground cellular networks), satellite communications offer many unique advantages.

[0044] First, satellite communications are not restricted by user geography. For example, conventional terrestrial communication networks cannot cover areas where network equipment cannot be deployed, such as oceans, mountains, and deserts. Alternatively, terrestrial communication networks cannot cover certain areas due to sparse populations. However, satellite communications, because a single satellite can cover a large ground area and orbits the Earth, theoretically, every corner of the Earth can be covered by a satellite communication network.

[0045] Secondly, satellite communications have significant social value. They can provide low-cost coverage to remote, mountainous areas and impoverished countries and regions, enabling people in these areas to enjoy advanced voice communications and mobile internet technologies. From this perspective, satellite communications help narrow the digital divide with developed regions and promote their development.

[0046] Again, satellite communication has a long distance, and the communication cost does not increase significantly with the increase of communication distance.

[0047] Finally, satellite communications are highly stable and not affected by natural disasters.

[0048] Communication satellites can be categorized by their orbital altitude into low Earth orbit (LEO), medium Earth orbit (MEO), geostationary Earth orbit (GEO), and high elliptical orbit (HEO). Currently, research focuses on LEO and GEO satellites.

[0049] LEO satellites typically operate at altitudes between 500 and 1500 km. Accordingly, their orbital period is approximately 1.5 to 2 hours. For LEO satellites, the signal propagation delay for single-hop communication between users is typically less than 20 milliseconds. The maximum satellite visibility time for LEO satellites is approximately 20 minutes. LEO satellites offer advantages such as short signal propagation distances, low link loss, and low transmit power requirements for terminal devices.

[0050] GEO satellites orbit at an altitude of approximately 35,786 km. They orbit the Earth every 24 hours. For GEO satellites, the signal propagation delay for single-hop communication between users is typically approximately 250 milliseconds. NTN systems include both NR NTN systems and IoT NTN systems.

[0051] Broadcast business

[0052] Broadcast services can be understood as arbitrary communication, meaning a message is sent from one sender to any receiver. The source transmits the broadcast service data over a broadcast channel, and any terminal or network device within the broadcast signal's coverage area can attempt to receive the broadcast service data.

[0053] multicast

[0054] Multicast services can be understood as one-to-many communication, meaning a single sender sends a message to multiple receivers. In this case, the source transmits group multicast service data over a multicast channel. Terminal devices or network devices within the multicast signal's coverage area and that are members of the group can attempt to receive the multicast service data. When a terminal device or network device joins a group, it acquires multicast channel resources. Multicast services can also be referred to as multicast / multicast broadcast services (MBS) or multimedia broadcast multicast services (MBMS).

[0055] In order to control the data transmission range of multicast or broadcast services, wireless cellular networks have introduced the concept of a service area for multicast or broadcast services. The service area for the multicast or broadcast service is usually represented by multiple cells. The base station can perform data transmission for the multicast or broadcast service in the cell corresponding to the service area for the multicast or broadcast service. It should be understood that the area of ​​the service area for the multicast or broadcast service is usually much larger than the area covered by the TN cell. For conventional TN cells, the diameter is only a few hundred meters to a few kilometers. The service area for the multicast or broadcast service usually includes multiple TN cells. Therefore, the service area for the multicast or broadcast service can be represented by multiple cells. The following is a detailed introduction to the initiation process of the multicast or broadcast service in conjunction with Figure 2.

[0056] As shown in Figure 2, if a broadcast operator wishes to begin broadcasting a program, it sends a Session Start message for a multicast or broadcast service. This message may include a parameter for the service area of ​​the multicast or broadcast service, essentially a cell list containing multiple cells. In the example shown in Figure 2, the cell list corresponding to the service area of ​​the multicast or broadcast service is: cell 2 (cell 2), cell 3 (cell 3), and cell 4 (cell 4). After receiving the Session Start message, the core network (CN) identifies the cells corresponding to the service area of ​​the multicast or broadcast service and transmits the Session Start message only to the base stations corresponding to the relevant cells in the cell list, notifying the base stations of which cells will participate in transmitting the multicast or broadcast service data. In the example shown in Figure 2, cells 1 and 2 are operated by gNB A, cell 3 is operated by gNB B, and cells 4 and 5 are operated by gNB C. Therefore, the core network can notify gNB A that cell 2 participates in the data transmission of the current multicast or broadcast service; notify gNB B that cell 3 participates in the data transmission of the current multicast or broadcast service; and notify gNB C that cell 4 participates in the data transmission of the multicast or broadcast service, thereby controlling the data transmission scope of the multicast or broadcast service.

[0057] However, some cells have a relatively large coverage area, such as an NTN cell, whose diameter can reach hundreds of kilometers or even thousands of kilometers. The service area of ​​a multicast or broadcast service may be part of the cell (for example, the service area of ​​a multicast or broadcast service is smaller than the coverage area of ​​an NTN cell). If the transmission method of the multicast or broadcast service in Figure 2 is adopted, the access network will transmit the multicast or broadcast service data within the range of a cell (such as an NTN cell), which may cause the data transmission range of the multicast or broadcast service to be inaccurate.

[0058] To address the above issues, an embodiment of the present application provides a wireless communication method in which a base station can send first information to a terminal device to indicate a first service area (e.g., a portion of a cell) for a multicast or broadcast service, thereby facilitating precise control of the data transmission range of the multicast or broadcast service. This wireless communication method is described in detail below with reference to FIG3 .

[0059] FIG3 is a schematic flow chart of a wireless communication method according to an embodiment of the present application. The base station in FIG3 may also be referred to as a network device, which may be, for example, network device 110 in FIG1 . The terminal device in FIG3 may be any of the aforementioned types of terminal devices, such as terminal device 120 in FIG1 .

[0060] As shown in Figure 3, in step S310, a terminal device receives first information sent by a base station. The first information may be used to indicate a first service area for a multicast or broadcast service. For example, the first information may be information other than a cell set (or cell list), i.e., the first information is unrelated to cells within the base station's coverage area.

[0061] The first service area may refer to the area in which the base station transmits the multicast or broadcast service data to the terminal device. The first service area may be part of the base station cell; or the first service area overlaps with part of the base station cell.

[0062] In some implementations, the first information may include geographic coordinate information of the first service area, and the first information is used to indicate that the first service area is a geographic coordinate area.

[0063] For example, the first information may include the center and radius corresponding to the first service area. The first information may be used to indicate that the first service area is one or more circular areas formed by one or more “centers + radii”, as shown in FIG4 .

[0064] For another example, the first information may include location information on the boundary of the first service area. The location information on the boundary may include, for example, multiple boundary coordinate points. The first information may be used to indicate that the first service area is a polygonal area formed by multiple boundary coordinate points.

[0065] For another example, the first information may include a sector (sector-shaped area) within the base station cell corresponding to the first service area, and the first information may be used to indicate that the first service area is the sector-shaped area.

[0066] According to the above introduction to the first information, the first information includes location information (such as geographic coordinate information) corresponding to the first service area, rather than the cell list corresponding to the first service area, that is, the first information is not related to the cells within the coverage range of the base station.

[0067] It is understandable that in the transmission mode of the multicast or broadcast service shown in FIG2 above, the multicast or broadcast service service area is a plurality of cells. Therefore, the multicast or broadcast service can be directly transmitted in the corresponding cell without notifying the terminal devices in the cell of the service area of ​​the current multicast or broadcast service. However, the first service area in the embodiment of the present application may be a partial area of ​​the cell. The terminal devices in the cell and outside the first service area may not be able to receive the data of the multicast or broadcast service. Therefore, the base station needs to notify the terminal devices in the cell of the service area of ​​the current multicast or broadcast service (i.e., the first service area) so that the terminal devices can determine whether they support receiving the data of the current multicast or broadcast service.

[0068] The embodiments of the present application do not impose any specific restrictions on the manner in which the base station notifies the terminal devices in the cell. In some implementations, the base station may notify the terminal devices by broadcasting. For example, the base station may notify the terminal devices in the cell by means of a system information block (SIB), i.e., the first information is carried in the SIB. For another example, the base station may notify the terminal devices in the cell by means of a multicast broadcast control channel (MCCH), i.e., the first information is carried in the MCCH.

[0069] In some implementations, the first information may be carried by adding a parameter to an existing SIB, or by adding a new SIB X. It should be understood that if the SIB contains the aforementioned newly added parameter or the newly added SIB X, it indicates that the current cell supports multicast or broadcast services within the first service area; if the SIB does not contain the aforementioned newly added parameter or the newly added SIB X, it indicates that the current cell may or may not support multicast or broadcast services within the first service area.

[0070] In other implementations, the first information may be carried by adding parameters to the MCCH. It should be understood that if the MCCH contains the above-mentioned additional parameters, it indicates that the current cell supports multicast or broadcast services within the first service area; if the MCCH does not contain the above-mentioned additional parameters, it indicates that the current cell may or may not support multicast or broadcast services within the first service area.

[0071] It should be noted that if the terminal device in the cell does not read the new parameters in the SIB, the new parameters in the MCCH, or the new SIB X, it can be assumed that the entire coverage area of ​​the cell belongs to the service area of ​​the current multicast or broadcast service. If the terminal device in the cell reads the first information in the above-mentioned new parameters, the terminal device can determine the service area of ​​the current multicast or broadcast service (i.e., the first service area) based on the first information.

[0072] In some implementations, the first information is carried in the SIB, and an update of the first information may not trigger a paging message. That is, if the service area of ​​a multicast or broadcast service is updated, resulting in an SIB update, the paging notification process is not triggered.

[0073] In some implementations, the first information is carried on the MCCH, and an update of the first information may not trigger a first message, which is used to notify the MCCH update. That is, if the service area of ​​a multicast or broadcast service is updated, resulting in an MCCH update, the MCCH update notification process is not triggered.

[0074] It should be understood that for a terminal device that does not support multicast or broadcast services within the first service area, whether the first information is received does not affect the behavior of the terminal device.

[0075] In some implementations, if there are multiple multicast or broadcast services, and the multicast or broadcast services correspond to different service areas, the first information may be used to indicate the service area corresponding to each multicast or broadcast service respectively.

[0076] Considering that terminal devices outside the first service area may also be interested in the current multicast or broadcast service, in some implementations, the first information is further used to indicate whether terminal devices outside the first service area can apply to receive data from the multicast or broadcast service. For example, the first information may include a Boolean parameter. If the parameter value is 0, it indicates that terminal devices outside the first service area can apply to receive data from the multicast or broadcast service; if the parameter value is 1, it indicates that terminal devices outside the first service area cannot apply to receive data from the multicast or broadcast service.

[0077] In some implementations, the first information is further used to indicate that a target terminal device outside the first service area can apply to receive data of a multicast or broadcast service. The target terminal device outside the first service area is associated with one or more of the following information: a priority of the terminal device; a target geographic area; and a capability of the terminal device.

[0078] In some implementations, the priority of a terminal device may be determined by one or more of protocol pre-definition, network device configuration, and pre-configuration. The target terminal device may be a terminal device with a priority higher than a preset threshold. The preset threshold may be configured as needed and is not specifically limited in this application.

[0079] In some implementations, the target geographical area may refer to the entire geographical area outside the first service area and within the base station cell; the target geographical area may also refer to a portion of the geographical area outside the first service area and within the base station cell. This application does not impose specific restrictions on this. The target terminal device may refer to a terminal device within the target geographical area.

[0080] In some implementations, the capabilities of the terminal device may refer to one or more of the following: the terminal device supports receiving multicast or broadcast services, and the terminal device supports point-to-point (PTP) communication. The target terminal device may refer to a terminal device that supports receiving multicast or broadcast services and supports PTP communication.

[0081] In other implementations, the target terminal device may also refer to a terminal device having a priority greater than a preset threshold, being located in a target geographical area, and supporting PTP communication transmission of multicast or broadcast services.

[0082] The first information is described in detail above. In some embodiments, the first information can be determined based on the second information described below. In other embodiments, the first information can be equivalent to the second information. The second information is described in detail below with reference to FIG5 .

[0083] As shown in FIG5 , in step S510 , the core network element may send second information to the base station, where the second information is used to indicate a service area of ​​a multicast or broadcast service, and the second information is irrelevant to the cell of the base station.

[0084] In some implementations, the second information may include one or more of the following information: the center and radius of the circle corresponding to the service area of ​​the multicast or broadcast service; and location information on the boundary of the service area of ​​the multicast or broadcast service.

[0085] In some implementations, the second information may include geographic coordinate information of a service area of ​​the multicast or broadcast service, and the second information is used to indicate that the service area of ​​the multicast or broadcast service is a geographic coordinate area.

[0086] For example, the second information may include the center and radius corresponding to the service area of ​​the multicast or broadcast service. The second information may be used to indicate that the service area of ​​the multicast or broadcast service is one or more circular areas formed by one or more "centers + radii".

[0087] For example, the second information may include location information on the boundary of the service area of ​​the multicast or broadcast service. The location information on the boundary may, for example, include multiple boundary coordinate points. The second information can be used to indicate that the service area of ​​the multicast or broadcast service is a polygonal area formed by multiple boundary coordinate points.

[0088] In the embodiment of the present application, the second information includes the location information corresponding to the service area of ​​the multicast or broadcast service, rather than the cell list corresponding to the service area of ​​the multicast or broadcast service. In other words, the second information has nothing to do with the cells within the coverage area of ​​the base station.

[0089] In some implementations, the core network element may refer to an access and mobility management function (AMF) or other network elements, such as a session management function (SMF). This application does not make any specific restrictions.

[0090] In some implementations, after receiving the second information, the base station may determine the first service area based on the service area of ​​the multicast or broadcast service and the coverage of the base station cell. For example, if the base station cell is a true subset of the service area of ​​the multicast or broadcast service, the first service area may be the base station cell; for another example, if the service area of ​​the multicast or broadcast service is a true subset of the base station cell, the first service area may be the service area of ​​the multicast or broadcast service, and in this case, the service area indicated by the first information is the same as the service area indicated by the second information; for another example, if there is an overlapping area between the base station cell and the service area of ​​the multicast or broadcast service, the first service area may be the overlapping area.

[0091] In some implementations, if the first service area is a partial area within a cell, or if the first service area overlaps with a partial area within the cell, the base station may resolve the partial area or overlapping area into one or more sector areas. That is, with the cell center as a reference point, a sector area may be represented by two angle parameters and two radius parameters, and the first service area may be the sector area.

[0092] The above mainly introduces the indication method and carrying method of the first information in detail. The following introduces the behavior of the terminal device after receiving the first information with examples.

[0093] It should be understood that after receiving the first information from the base station, the terminal device can determine the above-mentioned first service area, and then, based on the first service area and the current location information of the terminal device, the terminal device can determine whether to receive multicast or broadcast service data.

[0094] As an example, if the terminal device is located within the first service area, the terminal device determines to receive data of the multicast or broadcast service; if the terminal device is located outside the first service area, the terminal device determines not to receive data of the multicast or broadcast service.

[0095] As mentioned above, the first information is also used to indicate whether terminal devices outside the first service area can apply to receive multicast or broadcast service data.

[0096] 6 , in step S610 , the base station sends a second message to the terminal device. The second message may be used to inquire whether the terminal device is interested in a multicast or broadcast service.

[0097] In step S620, the terminal device sends a reply message to the second message to the base station, and the reply message can be used to indicate one or more of the following: the terminal device is not interested in the multicast or broadcast service; the terminal device is interested in the multicast or broadcast service, and the terminal device cannot receive the multicast or broadcast service.

[0098] It can be understood that the reply message can be used to indicate the reason why the terminal device cannot receive the multicast or broadcast service, and the reason includes that the terminal device is located outside the first service area.

[0099] 7 , in step S710 , the terminal device may send a third message to the base station, where the third message is used to request a multicast or broadcast service.

[0100] In some implementations, if the first information indicates that a terminal device outside the first service area can apply to receive data of a multicast or broadcast service, the terminal device may send the third message to the base station.

[0101] In some implementations, the first information is further used to indicate that a target terminal device outside the first service area can apply to receive data of a multicast or broadcast service. The target terminal device outside the first service area is associated with one or more of the following information: a priority of the terminal device; a target geographic area; and a capability of the terminal device.

[0102] In some implementations, the priority of a terminal device may be determined by one or more of protocol pre-definition, network device configuration, and pre-configuration. The target terminal device may be a terminal device with a priority higher than a preset threshold. The preset threshold may be configured as needed and is not specifically limited in this application.

[0103] In some implementations, the target geographical area may refer to the entire geographical area outside the first service area and within the base station cell; the target geographical area may also refer to a portion of the geographical area outside the first service area and within the base station cell. This application does not impose specific restrictions on this. The target terminal device may refer to a terminal device within the target geographical area.

[0104] In some implementations, the capability of the terminal device may refer to one or more of the following: the terminal device supports receiving multicast or broadcast services, and the terminal device supports communication in PTP mode. The target terminal device may refer to a terminal device that supports receiving multicast or broadcast services and supports PTP communication.

[0105] In some implementations, the target terminal device may also refer to a terminal device having a priority greater than a preset threshold, being located in a target geographical area, and supporting PTP communication transmission of multicast or broadcast services.

[0106] It should be noted that even if the first information does not indicate that the terminal device can apply to receive data of a multicast or broadcast service, if the terminal device is located outside the first service area, the terminal device can also send the above-mentioned third message to the base station.

[0107] In some implementations, the third message may include one or more of the following information: location information of the terminal device (e.g., location coordinate information of the terminal device); identification information of the multicast or broadcast service (e.g., ID information of the multicast or broadcast service). It should be understood that the base station may send data corresponding to the multicast or broadcast service to the corresponding terminal device based on the third message.

[0108] It should be noted that, in the present application, a cell within the coverage area of ​​a base station may be an NTN cell, and of course may also refer to a TN cell (for example, a TN cell with a larger coverage area).

[0109] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 7 . The device embodiment of the present application is described in detail below in conjunction with Figures 8 to 11 . It should be understood that the description of the method embodiment corresponds to the description of the device embodiment. Therefore, for portions not described in detail, reference can be made to the above method embodiment.

[0110] FIG8 is a schematic diagram of the structure of a communication device according to an embodiment of the present application. The communication device 800 shown in FIG8 is a terminal device, and the communication device 800 includes a first receiving unit 810. The first receiving unit 810 is configured to receive first information sent by a base station, where the first information is configured to indicate a first service area for a multicast or broadcast service.

[0111] In some implementations, the first service area is a partial area within a cell; or, the first service area overlaps with a partial area within a cell.

[0112] In some implementations, the first information includes one or more of the following information: the center and radius of the circle corresponding to the first service area; location information on the boundary of the first service area; and a sector within a cell corresponding to the first service area.

[0113] In some implementations, the first information is further used to indicate whether a terminal device outside the first service area can apply to receive data of the multicast or broadcast service.

[0114] In some implementations, the first information is carried in a system information block SIB or a multicast broadcast control channel MCCH.

[0115] In some implementations, the first information is carried in the SIB, and updating of the first information does not trigger a paging message.

[0116] In some implementations, the first information is carried on the MCCH, and an update of the first information does not trigger a first message, which is used to notify the MCCH update.

[0117] In some implementations, the communication device further includes: a determination unit for determining whether to receive data of the multicast or broadcast service if the terminal device is located within the first service area; and / or determining not to receive data of the multicast or broadcast service if the terminal device is located outside the first service area.

[0118] In some implementations, the communication device further includes: a second receiving unit, used to receive a second message sent by the base station, the second message being used to inquire whether the terminal device is interested in the multicast or broadcast service; a first sending unit, used to send a reply message to the second message to the base station, the reply message being used to indicate one or more of the following: the terminal device is not interested in the multicast or broadcast service; the terminal device is interested in the multicast or broadcast service, and the terminal device cannot receive the multicast or broadcast service.

[0119] In some implementations, the reply message indicates a reason why the terminal device cannot receive the multicast or broadcast service, and the reason includes that the terminal device is located outside the first service area.

[0120] In some implementations, the communication device further includes: a second sending unit, configured to send a third message to the base station if the terminal device is located outside the first service area, and / or the first information indicates that the terminal device outside the first service area can apply to receive data of the multicast or broadcast service, wherein the third message is used to request the multicast or broadcast service.

[0121] In some implementations, the third message includes one or more of the following: location information of the terminal device; identification information of the multicast or broadcast service.

[0122] In some implementations, the first information is independent of cells within the coverage of the base station.

[0123] In some implementations, the cell within the coverage of the base station is an NTN cell.

[0124] FIG9 is a schematic diagram of the structure of a communication device according to an embodiment of the present application. The communication device 900 shown in FIG9 is a base station, and the communication device 900 includes a first sending unit 910. The first sending unit 910 is configured to send first information to a terminal device, where the first information is configured to indicate a first service area for a multicast or broadcast service.

[0125] In some implementations, the first service area is a partial area within a cell; or, the first service area overlaps with a partial area within a cell.

[0126] In some implementations, the first information includes one or more of the following information: the center and radius of the circle corresponding to the first service area; location information on the boundary of the first service area; and a sector within a cell corresponding to the first service area.

[0127] In some implementations, the first information is further used to indicate whether a terminal device outside the first service area can apply to receive data of the multicast or broadcast service.

[0128] In some implementations, the first information is carried in a system information block SIB or a multicast broadcast control channel MCCH.

[0129] In some implementations, the first information is carried in the SIB, and updating of the first information does not trigger a paging message.

[0130] In some implementations, the first information is carried on the MCCH, and an update of the first information does not trigger a first message, which is used to notify the MCCH update.

[0131] In some implementations, the communication device further includes: a second sending unit, used to send a second message to the terminal device, the second message being used to inquire whether the terminal device is interested in the multicast or broadcast service; the base station receives a reply message to the second message sent by the terminal device, the reply message being used to indicate one or more of the following: the terminal device is not interested in the multicast or broadcast service; the terminal device is interested in the multicast or broadcast service, and the terminal device cannot receive the multicast or broadcast service.

[0132] In some implementations, the reply message indicates a reason why the terminal device cannot receive the multicast or broadcast service, and the reason includes that the terminal device is located outside the first service area.

[0133] In some implementations, the communication device further includes: a first receiving unit, configured to receive a third message sent by the terminal device, where the third message is used to request the multicast or broadcast service.

[0134] In some implementations, the third message includes one or more of the following: location information of the terminal device; identification information of the multicast or broadcast service.

[0135] In some implementations, before the base station sends the first information to the terminal device, the communication device also includes: a second receiving unit, used to receive second information from the core network, the second information is used to indicate the first service area, and the second information is not related to the cell of the base station.

[0136] In some implementations, the second information includes one or more of the following information: the center and radius of the circle corresponding to the service area of ​​the multicast or broadcast service; and location information on the boundary of the service area of ​​the multicast or broadcast service.

[0137] In some implementations, the first information is independent of cells within the coverage of the base station.

[0138] In some implementations, the cell within the coverage of the base station is an NTN cell.

[0139] Figure 10 is a schematic diagram of the structure of a terminal device according to an embodiment of the present application. The communication device 1000 shown in Figure 10 is a core network device, and the communication device 1000 includes a sending unit 1010. The sending unit 1010 is configured to send second information to a base station, where the second information is used to indicate a service area for a multicast or broadcast service, and the second information is unrelated to the cell of the base station.

[0140] In some implementations, the second information includes one or more of the following information: the center and radius of the circle corresponding to the service area of ​​the multicast or broadcast service; and location information on the boundary of the service area of ​​the multicast or broadcast service.

[0141] In some implementations, the cell within the coverage of the base station is an NTN cell.

[0142] FIG11 is a schematic block diagram of a communication device to which embodiments of the present application may be applied. The dashed lines in FIG11 indicate that the unit or module is optional. Apparatus 1100 may be used to implement the method described in the above method embodiment. Apparatus 1100 may be a chip or a communication device.

[0143] The device 1100 may include one or more processors 1110. The processor 1110 may support the device 1100 to implement the method described in the method embodiment above. The processor 1110 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0144] The apparatus 1100 may further include one or more memories 1120. The memories 1120 store programs that can be executed by the processor 1110, causing the processor 1110 to perform the methods described in the above method embodiments. The memories 1120 may be independent of the processor 1110 or integrated into the processor 1110.

[0145] The apparatus 1100 may further include a transceiver 1130. The processor 1110 may communicate with other devices or chips via the transceiver 1130. For example, the processor 1110 may transmit and receive data with other devices or chips via the transceiver 1130.

[0146] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to the first network element, application function network element, or first communication device provided in the present application, and the program causes a computer to execute the method performed by the first network element, application function network element, or first communication device in each embodiment of the present application.

[0147] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to the first network element, application function network element, or first communication device provided in the embodiments of the present application, and the program causes a computer to execute the method performed by the first network element, application function network element, or first communication device in various embodiments of the present application.

[0148] The present application also provides a computer program. This computer program can be applied to the first network element, application function network element, or first communication device provided in the present application, and the computer program causes a computer to execute the method performed by the first network element, application function network element, or first communication device in each embodiment of the present application.

[0149] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0150] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0151] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0152] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0153] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0154] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0155] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0156] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0157] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0158] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0159] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0160] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0161] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that, Including: The terminal device receives first information sent by the base station, and the first information is used to indicate a first service area of a multicast or broadcast service.

2. The method according to claim 1, wherein The first service area is a partial area within the cell; or, the first service area overlaps with a partial area within the cell.

3. The method according to claim 1 or 2, characterized in that, The first information includes one or more of the following information: The center and radius corresponding to the first service area; Location information on the boundary of the first service area; The sector within the cell corresponding to the first service area.

4. The method according to any one of claims 1 to 3, characterized in that, The first information is further used to indicate whether a terminal device outside the first service area can apply to receive data of the multicast or broadcast service.

5. The method according to any one of claims 1 to 4, characterized in that, The first information is carried in a system information block SIB or a multicast broadcast control channel MCCH.

6. The method according to claim 5, wherein The first information is carried in the SIB, and the update of the first information does not trigger a paging message.

7. The method according to claim 5, wherein The first information is carried in the MCCH, and the update of the first information does not trigger a first message, and the first message is used to notify the update of the MCCH.

8. The method according to any one of claims 1 to 7, characterized in that, The method further includes: If the terminal device is located within the first service area, the terminal device determines to receive data of the multicast or broadcast service; and / or If the terminal device is located outside the first service area, the terminal device determines not to receive data of the multicast or broadcast service.

9. The method according to any one of claims 1 to 8, characterized in that, The method further includes: The terminal device receives a second message sent by the base station, and the second message is used to query whether the terminal device is interested in the multicast or broadcast service; The terminal device sends a reply message to the second message to the base station, and the reply message is used to indicate one or more of the following: The terminal device is not interested in the multicast or broadcast service; The terminal device is interested in the multicast or broadcast service, and the terminal device cannot receive the multicast or broadcast service.

10. The method according to claim 9, characterized in that, The reply message indicates the reason why the terminal device cannot receive the multicast or broadcast service, and the reason includes that the terminal device is located outside the first service area.

11. The method according to any one of claims 1 to 10, characterized in that, The method further includes: If the terminal device is located outside the first service area, and / or the first information indicates that a terminal device outside the first service area can apply to receive data of the multicast or broadcast service, the terminal device sends a third message to the base station, and the third message is used to request the multicast or broadcast service.

12. The method according to claim 11, wherein The third message includes one or more of the following: The location information of the terminal device; The identification information of the multicast or broadcast service.

13. The method according to any one of claims 1 to 12, characterized in that, The first information has nothing to do with the cells within the coverage of the base station.

14. The method according to any one of claims 1 to 13, characterized in that, The cells within the coverage of the base station are non-terrestrial network NTN cells.

15. A wireless communication method, characterized in that, Including: The first information sent by the base station to the terminal device, and the first information is used to indicate a first service area of a multicast or broadcast service.

16. The method according to claim 15, wherein The first service area is a partial area within the cell; or, the first service area overlaps with a partial area within the cell.

17. The method according to claim 15 or 16, characterized in that, The first information includes one or more of the following information: The center and radius corresponding to the first service area; Location information on the boundary of the first service area; The sector corresponding to the first service area within the cell.

18. The method according to any one of claims 15 to 17, characterized in that, The first information is further used to indicate whether a terminal device outside the first service area can apply to receive data of the multicast or broadcast service.

19. The method according to any one of claims 15 to 18, characterized in that, The first information is carried in a system information block SIB or a multicast / broadcast control channel MCCH.

20. The method according to claim 19, wherein The first information is carried in the SIB, and the update of the first information does not trigger a paging message.

21. The method according to claim 19, wherein The first information is carried in the MCCH, and the update of the first information does not trigger a first message for notifying the update of the MCCH.

22. The method according to any one of claims 15 to 21, characterized in that, The method further includes: The base station sends a second message to the terminal device, and the second message is used to query whether the terminal device is interested in the multicast or broadcast service; The base station receives a reply message to the second message sent by the terminal device, and the reply message is used to indicate one or more of the following: The terminal device is not interested in the multicast or broadcast service; The terminal device is interested in the multicast or broadcast service, and the terminal device cannot receive the multicast or broadcast service.

23. The method according to claim 22, wherein The reply message indicates the reason why the terminal device cannot receive the multicast or broadcast service, and the reason includes that the terminal device is located outside the first service area.

24. The method according to any one of claims 15 to 23, characterized in that, The method further includes: The base station receives a third message sent by the terminal device, and the third message is used to request the multicast or broadcast service.

25. The method according to claim 24, wherein The third message includes one or more of the following: The location information of the terminal device; The identification information of the multicast or broadcast service.

26. The method according to any one of claims 15 to 25, characterized in that, Before the first information sent by the base station to the terminal device, the method further includes: The base station receives second information from the core network, and the second information is used to indicate the service area of the multicast or broadcast service, and the second information is not related to the cell of the base station.

27. The method according to claim 26, characterized in that, The second information includes one or more of the following information: The center and radius corresponding to the service area of the multicast or broadcast service; The location information on the boundary of the service area of the multicast or broadcast service.

28. The method according to any one of claims 15 to 27, characterized in that, The first information is not related to the cells within the coverage of the base station.

29. The method according to any one of claims 15 to 28, characterized in that, The cells within the coverage of the base station are non-terrestrial network NTN cells.

30. A wireless communication method, characterized in that, Includes: The core network sends second information to the base station, and the second information is used to indicate the service area of the multicast or broadcast service, and the second information is not related to the cell of the base station.

31. The method according to claim 30, wherein The second information includes one or more of the following information: The center and radius corresponding to the service area of the multicast or broadcast service; The location information on the boundary of the service area of the multicast or broadcast service.

32. The method according to claim 30 or 31, characterized in that, The cells within the coverage of the base station are non-terrestrial network NTN cells.

33. A communication device, characterized in that, The communication device is a terminal device, and the communication device includes: A first receiving unit, configured to receive first information sent by a base station, where the first information is used to indicate a first service area of a multicast or broadcast service.

34. The communication device according to claim 33, characterized in that, The first service area is a partial area within the cell; or, the first service area overlaps with a partial area within the cell.

35. The communication device according to claim 33 or 34, characterized in that, The first information includes one or more of the following information: The center and radius corresponding to the first service area; Location information on the boundary of the first service area; The sector in the cell corresponding to the first service area.

36. The communication device according to any one of claims 33 to 35, characterized in that, The first information is also used to indicate whether a terminal device outside the first service area can apply to receive data of the multicast or broadcast service.

37. The communication device according to any one of claims 33 to 36, characterized in that The first information is carried in the system information block SIB or the multicast / broadcast control channel MCCH.

38. The communication device according to claim 37, wherein, The first information is carried in the SIB, and the update of the first information does not trigger a paging message.

39. The communication device according to claim 37, characterized in that, The first information is carried in the MCCH, and the update of the first information does not trigger a first message, which is used to notify the update of the MCCH.

40. The communication device according to any one of claims 33 to 39, characterized in that The communication device further includes: A determination unit, configured to determine to receive data of the multicast or broadcast service if the terminal device is located within the first service area; and / or Determine not to receive data of the multicast or broadcast service if the terminal device is located outside the first service area.

41. The communication device according to any one of claims 33 to 40, characterized in that, The communication device further includes: A second receiving unit, configured to receive a second message sent by the base station, where the second message is used to query whether the terminal device is interested in the multicast or broadcast service; A first sending unit, configured to send a reply message to the second message to the base station, where the reply message is used to indicate one or more of the following: The terminal device is not interested in the multicast or broadcast service; The terminal device is interested in the multicast or broadcast service, and the terminal device cannot receive the multicast or broadcast service.

42. The communication device according to claim 41, wherein The reply message indicates the reason why the terminal device cannot receive the multicast or broadcast service, and the reason includes that the terminal device is located outside the first service area.

43. The communication device according to any one of claims 33 to 42, characterized in that, The communication device further includes: A second sending unit, configured to send a third message to the base station if the terminal device is located outside the first service area and / or the first information indicates that a terminal device outside the first service area can apply to receive data of the multicast or broadcast service, where the third message is used to request the multicast or broadcast service.

44. The communication device according to claim 43, characterized in that, The third message includes one or more of the following: The location information of the terminal device; The identification information of the multicast or broadcast service.

45. The communication device according to any one of claims 33 to 44, characterized in that, The first information has nothing to do with the cells within the coverage area of the base station.

46. The communication device according to any one of claims 33 to 45, characterized in that, The cells within the coverage area of the base station are non-terrestrial network NTN cells.

47. A communication device, characterized in that, The communication device is a base station, and the communication device includes: A first sending unit, configured to send first information to a terminal device, where the first information is used to indicate a first service area of a multicast or broadcast service.

48. The communication device according to claim 47, characterized in that, The first service area is a partial area within the cell; or, the first service area overlaps with a partial area within the cell.

49. The communication device according to claim 47 or 48, characterized in that, The first information includes one or more of the following information: The center and radius corresponding to the first service area; Location information on the boundary of the first service area; The sector in the cell corresponding to the first service area.

50. The communication device according to any one of claims 47 to 49, characterized in that The first information is also used to indicate whether a terminal device outside the first service area can apply to receive data of the multicast or broadcast service.

51. The communication device according to any one of claims 47 to 50, characterized in that, The first information is carried in the system information block SIB or the multicast / broadcast control channel MCCH.

52. The communication device according to claim 51, characterized in that, The first information is carried by the SIB, and an update of the first information does not trigger a paging message.

53. The communication device according to claim 51, characterized in that, The first information is carried by the MCCH, and an update of the first information does not trigger a first message for notifying an update of the MCCH.

54. The communication device according to any one of claims 47 to 53, characterized in that, The communication device further includes: A second sending unit, configured to send a second message to the terminal device, where the second message is used to query whether the terminal device is interested in the multicast or broadcast service; The base station receives a reply message of the second message sent by the terminal device, and the reply message is used to indicate one or more of the following: The terminal device is not interested in the multicast or broadcast service; The terminal device is interested in the multicast or broadcast service, and the terminal device cannot receive the multicast or broadcast service.

55. The communication device according to claim 54, characterized in that, The reply message indicates a reason why the terminal device cannot receive the multicast or broadcast service, and the reason includes that the terminal device is located outside the first service area.

56. The communication device according to any one of claims 47 to 55, characterized in that, The communication device further includes: A first receiving unit, configured to receive a third message sent by the terminal device, where the third message is used to request the multicast or broadcast service.

57. The communication device according to claim 56, characterized in that, The third message includes one or more of the following: Location information of the terminal device; Identification information of the multicast or broadcast service.

58. The communication device according to any one of claims 47 to 57, characterized in that, Before the first information sent by the base station to the terminal device, the communication device further includes: A second receiving unit, configured to receive second information from the core network, where the second information is used to indicate the first service area, and the second information is not related to the cell of the base station.

59. The communication device according to claim 58, wherein, The second information includes one or more of the following information: The center and radius corresponding to the service area of the multicast or broadcast service; Location information on the boundary of the service area of the multicast or broadcast service.

60. The communication device according to any one of claims 47 to 59, characterized in that, The first information is not related to the cells within the coverage of the base station.

61. The communication device according to any one of claims 47 to 60, characterized in that, The cells within the coverage of the base station are non-terrestrial network (NTN) cells.

62. A communication device, characterized in that, The communication device is a core network device, and the communication device includes: A sending unit, configured to send second information to the base station, where the second information is used to indicate the service area of the multicast or broadcast service, and the second information is not related to the cell of the base station.

63. The communication device according to claim 62, wherein, The second information includes one or more of the following information: The center and radius corresponding to the service area of the multicast or broadcast service; Location information on the boundary of the service area of the multicast or broadcast service.

64. The communication device according to claim 62 or 63, characterized in that, The cells within the coverage of the base station are non-terrestrial network (NTN) cells.

65. A communication device, characterized in that, Including a memory and a processor, where the memory is used to store a program, and the processor is used to call the program in the memory to execute the method according to any one of claims 1-14, 15-29, or 30-32.

66. A device, characterized in that, Including a processor, configured to call a program from a memory to execute the method according to any one of claims 1-14, 15-29, or 30-32.

67. A chip, characterized in that, Including a processor, configured to call a program from a memory, such that a device installed with the chip executes the method according to any one of claims 1-14, 15-29, or 30-32.

68. A computer-readable storage medium, characterized in that, A program is stored thereon, and the program causes a computer to execute the method according to any one of claims 1-14, 15-29 or 30-32.

69. A computer program product, characterized in that, It includes a program, and the program causes a computer to execute the method according to any one of claims 1-14, 15-29 or 30-32.

70. A computer program, characterized in that, The computer program causes a computer to execute the method according to any one of claims 1-14, 15-29 or 30-32.

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