Wireless communication method, terminal equipment and network equipment

Abstract

The invention provides a wireless communication method, terminal equipment and network equipment. The method comprises: a terminal device receiving first information sent by a network device, the first information being used for indicating one or more of the following: service area information, the service area information being used for indicating a service area of a first multicast broadcast service (MBS) in a non-terrestrial network (NTN) cell; channel configuration information, wherein the channel configuration information is used for indicating configuration information of a channel bearing the first MBS in the service area; and a first association relationship, wherein the first association relationship is used for indicating an association relationship between the service area and the first MBS. On the basis of the first information, the terminal equipment in the NTN system is helpful to avoid receiving the content data of the first MBS in the service area of the non-first MBS so as to improve the resource utilization rate.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a wireless communication method, terminal equipment and network equipment. Background Art

[0002] Multimedia broadcast service (MBS) can provide multicast and broadcast services and is widely used in terrestrial network (TN) systems. Compared with TN, non-terrestrial network (NTN) can support a larger coverage area. How to apply MBS in NTN system is a technical issue worth studying. Summary of the invention

[0003] The present application provides a wireless communication method, terminal equipment and network equipment. The following introduces various aspects involved in the present application.

[0004] In a first aspect, a method for wireless communication is provided, including: a terminal device receives first information sent by a network device, the first information being used to indicate one or more of the following: service area information, the service area information being used to indicate a service area of ​​a first multicast broadcast service MBS within a non-terrestrial network NTN cell; channel configuration information, the channel configuration information being used to indicate configuration information of a channel carrying the first MBS within the service area; a first association relationship, the first association relationship being used to indicate an association relationship between the service area and the first MBS.

[0005] In a second aspect, a method for wireless communication is provided, including: a network device sends first information to a terminal device, the first information being used to indicate one or more of the following: service area information, the service area information being used to indicate a service area of ​​a first multicast broadcast service MBS within a non-terrestrial network NTN cell; channel configuration information, the channel configuration information being used to indicate configuration information of a channel carrying the first MBS within the service area; a first association relationship, the first association relationship being used to indicate an association relationship between the service area and the first MBS.

[0006] According to a third aspect, a terminal device is provided, comprising: a receiving unit, configured to receive first information sent by a network device, wherein the first information is used to indicate one or more of the following: service area information, wherein the service area information is used to indicate a service area of ​​a first multicast broadcast service MBS within a non-terrestrial network NTN cell; channel configuration information, wherein the channel configuration information is used to indicate configuration information of a channel carrying the first MBS within the service area; and a first association relationship, wherein the first association relationship is used to indicate an association relationship between the service area and the first MBS.

[0007] In a fourth aspect, a network device is provided, comprising: a sending unit, configured to send first information to a terminal device, wherein the first information is used to indicate one or more of the following: service area information, wherein the service area information is used to indicate a service area of ​​a first multicast broadcast service MBS within a non-terrestrial network NTN cell; channel configuration information, wherein the channel configuration information is used to indicate configuration information of a channel carrying the first MBS within the service area; and a first association relationship, wherein the first association relationship is used to indicate an association relationship between the service area and the first MBS.

[0008] In a fifth aspect, a terminal device is provided, comprising a processor, a memory and a communication interface, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer programs in the memory so that the terminal device executes part or all of the steps in the method of the first aspect.

[0009] In a sixth aspect, a network device is provided, comprising a processor, a memory, and a transceiver, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer programs in the memory so that the network device executes part or all of the steps in the method of the second aspect.

[0010] In a seventh aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device and / or network device. In another possible design, the system may also include other devices that interact with the terminal device or network device in the solution provided by the embodiment of the present application.

[0011] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, wherein the computer program enables a communication device (for example, a terminal device or a network device) to perform some or all of the steps in the methods of the above aspects.

[0012] In a ninth aspect, an embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable a communication device (e.g., a terminal device or a network device) to perform some or all of the steps in the above-mentioned various aspects of the method. In some implementations, the computer program product can be a software installation package.

[0013] In the tenth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0014] In an embodiment of the present application, a terminal device receives first information sent by a network device, and the first information is used to indicate one or more of the following: service area information of a first MBS in an NTN cell; channel configuration information carrying the first MBS in a service area; and a first association relationship between a service area and the first MBS. Based on the first information, the terminal device in the NTN system helps to avoid receiving content data of the first MBS in a service area other than the first MBS, so as to improve resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a wireless communication system 100 applied in an embodiment of the present application.

[0016] Figure 2 This is an NTN network architecture applicable to the embodiments of the present application.

[0017] Figure 3 This is another NTN network architecture applicable to the embodiments of the present application.

[0018] Figure 4 It is a schematic flowchart of the wireless communication method of an embodiment of the present application.

[0019] Figure 5 This is an example diagram of the association relationship between the service area and the first beam in an embodiment of the present application.

[0020] Figure 6 This is an example diagram of the service area of ​​an embodiment of the present application.

[0021] Figure 7 It is a schematic diagram of a terminal device according to an embodiment of the present application.

[0022] Figure 8 It is a schematic diagram of a network device according to an embodiment of the present application.

[0023] Fig. 9 It is a schematic structural diagram of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0024] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0025] Figure 1 The wireless communication system 100 used in the embodiment of the present application 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 geographical area and may communicate with the terminal device 120 located in the coverage area.

[0026] Figure 1 One network device and two terminals are shown exemplarily. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0027] Optionally, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.

[0028] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: the fifth generation (5th generation, 5G) system or new radio (new radio, NR), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), etc. The technical solutions provided by the present application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, and so on.

[0029] The terminal device in the embodiment 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 embodiment of the present application may be a device that provides voice and / or data connectivity to a user, and may 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 embodiment 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 smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in 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 a sidelink signal. The cellular phone and the smart home device communicate with each other without relaying the communication signal through the base station.

[0030] The network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be referred to as an access network device or a wireless access network device, such as a base station. The network device in the embodiment of the present application may refer to a wireless access network (RAN) node (or device) that connects a terminal device to a wireless network. Base station can broadly cover various names as follows, or replace 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, auxiliary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, base band unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The 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. The base station can also refer to a communication module, a modem or a chip used to be arranged 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), machine-to-machine (M2M) communications, a network-side device in a 6G network, and 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 the present application do not limit the specific technology and specific device form used by the network equipment.

[0031] 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.

[0032] 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.

[0033] The network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and satellites in the air. The embodiments of the present application do not limit the scenarios in which the network equipment and terminal equipment are located.

[0034] It should be understood that all or part of the functions of the communication device in the present application may also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (eg, a cloud platform).

[0035] NTN

[0036] With the development of communication technology, communication systems will gradually integrate the market potential of satellites and ground network infrastructure. According to the altitude of the orbit, satellites refer to spacecraft in low earth orbit (LEO), medium earth orbit (MEO), geostationary earth orbit (GEO) or high elliptical orbit (HEO).

[0037] LEO is an Earth-centered orbit with an altitude of 2,000 km or less, a typical altitude of 250-1,500 km, or at least 11.25 cycles per day, an eccentricity of less than 0.25, and an orbital period of 90-120 minutes. Most man-made objects in outer space are located in LEO. LEO satellites orbit the Earth at high speed (mobility), but in predictable or determined orbits, with small transmission delays, low link losses, and relatively small coverage areas, making them suitable for application scenarios that require fast data transmission and low latency.

[0038] MEO is 5,000 to 25,000 kilometers away from the earth's surface, with an orbital period of 3-15 hours. MEO satellites are non-geosynchronous satellites. They are mainly used as a supplement and extension of the land mobile communication system, and are organically combined with the ground public network to realize global personal mobile communications.

[0039] GEO, also known as "synchronous orbit", is a circular orbit around the earth 35,786 kilometers above the equator. The time it takes for a satellite in this orbit to orbit the earth is the same as the time it takes for the earth to rotate once (24 hours). Relative to the earth, the satellite is stationary, so it is called a geostationary orbit.

[0040] HEO is an elliptical orbit with a low perigee and a very high apogee. Its apogee altitude is greater than the altitude of a geostationary satellite and is often used by spacecraft.

[0041] NTN refers to a network or network segment that uses radio frequency (RF) resources on satellite or unmanned aircraft system (UAS) platforms. In communication standards, NTN, including satellite segments, becomes part of the recognized 3rd generation partnership project (3GPP) connectivity infrastructure. Typical scenarios for NTN that provide access to terminal devices involve NTN transparent payloads, where the satellite or UAS platform acts as a relay, or NTN regenerative payloads with access network equipment (e.g., gNB) on top. Figure 2 and Figure 3 Introduce the network architecture of NTN.

[0042] NTN usually includes the following components:

[0043] Satellite 210: refers to the satellite of the Space Home Platform.

[0044] • Gateway 220: An earth-based gateway that connects the satellite to either the access network equipment 230 or the core network equipment 240, depending on the choice of architecture.

[0045] Feeder link: refers to the link between the gateway 220 and the satellite 210.

[0046] Service link: refers to the link between the satellite 210 and the terminal equipment.

[0047] For example, see Figure 2 and Figure 3 , which are two popular NTN network architectures: bent-pipe balise architecture and regenerative balise architecture. Figure 2 In the bent pipe transponder architecture shown, the access network equipment 230 is located on the earth behind a gateway, and the satellite 210 operates as a repeater forwarding the feeder link signal to the service link and vice versa. Figure 3 In the regenerative transponder architecture shown, the satellite 210 carries the access network device 230, and the feeder link connects it to the earth-based core network device 240. In some scenarios, the access network devices of the two architectures can be base stations, such as 4G base stations, narrow band internet of things (NB-IoT) base stations, etc.

[0048] MBS can provide multicast and broadcast services and is widely used in TN systems. MBS can be used not only for live TV and live video, but also for emergency and public safety, earthquake and tsunami warning systems (ETWS) and other public warning systems. It can also be used in Internet of Vehicles, Internet Protocol version 4 (IPv4) / Internet Protocol version 6 (IPv6) multicast transmission, Internet protocol television (IPTV), software delivery, group communication and Internet of Things services. Compared with the terrestrial network (TN), NTN can support a larger coverage area. How to apply MBS in the NTN system is a technical issue worth studying.

[0049] For example, the beam coverage is much larger than that of TN, even in low earth orbit, not to mention geosynchronous orbit, due to the ability to support multi-beam layouts, which enhances the geographical coverage of the satellite tracking area. As an example, NR NTN can support three expected scenarios for MBS broadcast services:

[0050] S1: The intended MBS service area is part of the NTN cell, and the service content can only be received within the service area (e.g., broadcasted via a dedicated beam).

[0051] S2: The intended MBS service area is part of the NTN cell, but the content of the service can be received in the entire cell.

[0052] S3: The intended MBS service area consists of a list of NTN cells / tracking areas.

[0053] However, in the above three expected scenarios, whether the MBS session can directly serve an NTN cell, whether the session content can be continuously received by the terminal device in an NTN cell, how to determine the expected MBS service area, and how the broadcast configuration information can be adapted to the NTN cell are all technical issues worth studying.

[0054] In order to solve the above problem, an embodiment of the present application provides a wireless communication method, in which a terminal device receives first information sent by a network device, and the first information is used to indicate one or more of the following: service area information of a first MBS in an NTN cell; channel configuration information carrying the first MBS in the service area; a first association relationship between the service area and the first MBS. Based on the first information, the terminal device in the NTN system helps to avoid receiving content data of the first MBS in a service area other than the first MBS, so as to improve resource utilization.

[0055] Combined with the following Figure 4 A wireless communication method according to an embodiment of the present application is introduced. Figure 4 It is a schematic flowchart of the wireless communication method of an embodiment of the present application. Figure 4 The method shown includes step S410.

[0056] In step S410, the network device sends first information to the terminal device.

[0057] In some implementations, the first information is used to indicate one or more of the following: service area information; channel configuration information; a first association relationship.

[0058] In some implementations, the service area information is used to indicate a service area of ​​the first MBS within the NTN cell.

[0059] In some implementations, the service area may be understood as an area covered by the first MBS in the NTN cell. Accordingly, the service area information may include information indicating the area covered by the first MBS in the NTN cell.

[0060] Since the coverage of the NTN cell is wide and can span regions or even countries, in order to ensure the coverage of the first MBS, in some implementations, the service area can be part or all of the NTN cell, and the terminal device can only receive the content data of the first MBS in the service area. For example, the network device broadcasts the content data of the first MBS through a dedicated beam in the service area, and the terminal device in the service area can receive the content data of the first MBS.

[0061] As described above, the service area may be the area covered by the first MBS within the NTN cell, that is, the service area is the area where the content data of the first MBS is expected to be transmitted, and the service area may also be referred to as the "expected MBS service area" or "MBS service cell".

[0062] In some implementations, the first MBS may be a broadcast service, that is, all terminal devices in a service area may receive content data of the first MBS. For example, the service of the first MBS may be ETWS.

[0063] In some implementations, the channel configuration information is used to indicate configuration information of a channel carrying the first MBS within the service area.

[0064] In some implementations, the channel carrying the first MBS may be a multicast control channel (MCCH) and / or a multicast traffic channel (MTCH), and accordingly, the channel configuration information may be used to indicate the MCCH and / or MTCH configuration information within the service area.

[0065] In the embodiment of the present application, the channel configuration information is not limited. For example, the channel configuration information is MCCH and / or MTCH configuration information, which may include configuration, repetition period, offset, and other information of the MCCH and / or MTCH carrying the first MBS broadcast service.

[0066] It should be noted that the above information configuration information is associated with the service area, that is, the channel configuration information is the relevant configuration information of the channels in the service area.

[0067] In some implementations, the channel carrying the first MBS is the MCCH, and the transmission / modification of the MCCH is subject to the first

[0068] One or more session IDs of the MBS, so the terminal device is required to always monitor the update of the channel configuration information when the session of the first MBS is started / stopped / changed or the neighboring cell information is changed.

[0069] In some implementations, the first association relationship is used to indicate an association relationship between the service area and the first MBS.

[0070] In some implementations, the first MBS has one or more service areas within the NTN cell, and the first association relationship may be used to indicate that the first MBS is associated with the one or more service areas.

[0071] When the first MBS supports transmission in multiple NTN cells, or in other words, when the first MBS is available in multiple NTN cells, two possible situations may be supported: a session of the first MBS may be available in multiple NTN cells; a session of the first MBS may be available in at least one entire NTN cell or a portion of at least one NTN cell.

[0072] In some implementations, if the first MBS is available in several NTN cells, the first information may not be used to indicate the service area, that is, in each NTN cell supporting the first MBS, there is no need to indicate the service area information to the terminal device, because the terminal devices residing on these NTN cells can receive the content data of the first MBS anywhere in the NTN cell.

[0073] In some implementations, if the first MBS is only available in a portion of the NTN cells, the geographical area of ​​the service area needs to be explicitly indicated.

[0074] In some implementations, a service area may include one or more geographic areas, and the service area information may include geographic area information. For example, if a service area includes one or more geographic areas, then a service area is associated with one or more geographic area identifiers (identities, IDs), and the geographic area ID may be represented by ID_zone. Accordingly, the geographic area information included in the service area information may be information corresponding to one or more geographic area IDs. Based on the geographic area information, on the one hand, it helps the terminal device determine whether to receive or decode the session of the first MBS at its location, and on the other hand, it helps the network device to transmit different first MBS sessions in different geographic areas.

[0075] In some implementations, the service area information includes geographic area information, that is, the first MBS is a location-related MBS, or the first MBS is an MBS for a specific area.

[0076] In some implementations, if the service area information includes geographic area information, the terminal device may determine whether to initiate the establishment or release of a multicast radio bearer (MRB) corresponding to the first MBS based on the geographic area information. For example, for a first MBS broadcast service for a service area, when the terminal device is in the geographic area corresponding to the service area, the terminal device may initiate a broadcast MRB establishment process; when the terminal device leaves the geographic area corresponding to the service area, the terminal device may initiate a broadcast MRB release process.

[0077] In some implementations, the geographic area information includes one or more of the following: a reference location; an area radius; a reference time; and associated information of the geographic area.

[0078] In some implementations, the geographic area information includes a reference location and an area radius, that is, the geographic area can be indicated by a circle. In this case, the geographic area information indicates a fixed geographic area of ​​the service area, and is similar to the TN coverage area list, so it can also be said that the geographic area information includes TN coverage area information.

[0079] In some implementations, the geographic area information may be provided in the form of a list of reference locations and cell radii, that is, the geographic area information includes a geographic area information list, or the geographic area information is used to indicate one or more geographic areas.

[0080] In some implementations, the geographic area information includes a reference location, an area radius, and a reference time. In this case, the geographic area information indicates a mobile geographic area of ​​the service area.

[0081] In some implementations, if the geographic area information indicates a mobile geographic area of ​​a service area, the reference position may be a central position of a geographic area, and the real-time central position may be derived from the satellite ephemeris corresponding to the NTN cell.

[0082] In some implementations, the associated information of a geographic area may be understood as other information used to indicate a geographic area. For example, the associated information of a geographic area indicates a polygon, which may approximate the geographic area of ​​the service area, and the polygon may match or may not match the border of a country or region. For another example, the geographical location of the service area is circular, but the circular geographical location may exceed the country or region to which the first MBS belongs, and the associated information of the geographic area may be the associated country or region information. For another example, the terminal device may use the associated information of the geographic area to determine the temporary mobile group identity (TMGI) to be received. The TMGI has public land mobile network (PLMN) information, and the actual geographical area of ​​the service area may be determined based on the PLMN.

[0083] In some implementations, the service area is associated with one or more first beams, that is, the service area includes the coverage of the beam footprints of one or more first beams, or, in other words, the coverage of the beam footprints of one or more first beams is within the service area, and accordingly, the content data of the first MBS can be transmitted through the first beam.

[0084] In some implementations, the network device is configured not to transmit the content data of the first MBS in a beam whose coverage of the beam footprint exceeds the geographical area, that is, except for the first beam, the network device is configured not to transmit the content data of the first MBS on other beams except the first beam.

[0085] In some implementations, if the service area is associated with one or more first beams, the service area information includes relevant information of the first beam, that is, the format of the service area information is beam-level granularity. For example, if the service area is associated with one or more first beams, then the service area includes the coverage of the beam footprint of one or more first beams, and the network device can only transmit the content data of the first MBS on the first beam, but not on other beams. Correspondingly, the terminal device can also determine the first beam based on the relevant information of the first beam, receive the content data of the first MBS on the first beam, and not receive the content data of the first MBS on other beams.

[0086] In some implementations, the service area information includes relevant information of the first beam, and the first information may be said to be used to indicate the "beam service status". After receiving the beam service status, the terminal device may adjust its own behavior. For example, after receiving the relevant information of the first beam, the terminal device may stop trying to receive the content data of the first MBS on the beam associated with the non-service area, and it can also ensure that the terminal device knows its service status before entering the first beam, which reduces unnecessary energy consumption and potential interference.

[0087] In some implementations, the relevant information of the first beam includes an identifier of the first beam and / or physical layer information of the first beam.

[0088] In some implementations, the identifier of the first beam may be an ID of the first beam, used to identify the first beam.

[0089] In some implementations, the identifier of the first beam may be a content identifier of the first beam, used to identify a content ID of a first MBS corresponding to the first beam.

[0090] In the embodiment of the present application, the first beam may have one or more identifiers. For example, the first beam may have two identifiers, namely, an ID and a content identifier.

[0091] In some implementations, the physical layer information of the first beam can be understood as the transmission resources and / or power of the first beam.

[0092] In the embodiments of the present application, there is no limitation on the transmission resources. In some implementations, the transmission resources may include one or more of the following: time domain resources, frequency domain resources, and code domain resources. Taking the transmission resources including time domain resources as an example, the time domain resources may include symbols, time slots, subframes, frames, etc. Of course, in the embodiments of the present application, the transmission resources may also include other time domain resources introduced in future communication systems. Taking the transmission resources including frequency domain resources as an example, the frequency domain resources may include subcarriers, frequency bands, bandwidths, etc. Of course, in the embodiments of the present application, the frequency domain resources may also include other frequency domain resources introduced in future communication systems. Taking the transmission resources including code domain resources as an example, the code domain resources may include codebooks, codewords, etc. Of course, in the embodiments of the present application, the code domain resources may also include other code domain resources introduced in future communication systems.

[0093] In some implementations, the coverage of the beam footprint of the first beam associated with the service area may be equal to the service area. Figure 5 , the first service area is associated with a first beam, and the coverage range of the beam footprint of the first beam is equal to the service area.

[0094] In some other implementations, the coverage area of ​​the beam footprint of the first beam associated with the service area may be smaller than the service area. Figure 5 , the second service area is associated with three first beams, and the coverage range of the beam footprints of the three first beams is smaller than that of the second service area.

[0095] In some implementations, the first beam is determined based on one or more of: antenna parameters; service requirements of terminal devices covered by the beam footprint; and a geographic area of ​​the service area.

[0096] In some implementations, the antenna parameters may be array size and / or phase.

[0097] In some implementations, the service demand of the terminal device covered by the beam footprint can be understood as the service demand of the terminal device covered by the beam footprint for the first MBS. For example, the service demand can be whether the terminal device covered by the beam footprint needs the first MBS, or whether the terminal device is interested in the first MBS.

[0098] In some implementations, the service requirements may be determined by one or more of the following: distribution of terminal devices covered by the beam footprint; service requirements of the first MBS; and service quality requirements of the first MBS.

[0099] In some implementations, the first beam is determined based on antenna parameters, service requirements of terminal devices covered by the beam footprint, and the geographic area of ​​the service area. For example, first, the coverage area of ​​each beam on the earth's surface is calculated based on the antenna parameters using beamforming technology; second, the matching degree between the beam coverage area and the geographic area of ​​the service area is accurately located in combination with geographic information system (GIS) data, and which beams cover the geographic area of ​​the service area are identified; finally, based on the service requirements of the terminal devices covered by the beam footprint, which beams in the beams covering the geographic area of ​​the service area are determined to be the first beams.

[0100] In some implementations, the first beam is determined by a network device. For example, the network device marks which beams belong to the service area, that is, determines the first beam associated with the service area, generates relevant information of the first beam, and sends it to the terminal device through a specific channel.

[0101] In some implementations, the service area is determined based on the priority of the candidate service area list. For example, a service area with a higher priority in the service area list is selected as the service area corresponding to the first MBS.

[0102] In some implementations, the candidate service area list is used to indicate one or more candidate service areas, or in other words, the candidate service area list is used to indicate one or more alternative service areas.

[0103] In some implementations, the candidate service area list is determined based on one or more of the following: distribution of target terminal devices; service demand of the first MBS; geographic location information of the NTN cell; and impact of the geographic location of the NTN cell on signal propagation.

[0104] In some implementations, the target terminal device is a terminal device that has a demand for the first MBS, or in other words, the target terminal device is a terminal device that is interested in the first MBS.

[0105] In some implementations, the distribution of target terminal devices may be understood as the distribution of target users of the first MBS.

[0106] In some implementations, the candidate service area list is determined based on the distribution of target terminal devices, which can be understood as determining the area requiring the first MBS based on the distribution of target users. For example, the distribution of target users can be analyzed based on user location data (such as historical connection records, real-time location information), and the main user gathering areas can be identified, and then the areas requiring the first MBS can be determined. These areas should cover the areas where most target users are located.

[0107] In some implementations, the candidate service area list is determined based on the service demand of the first MBS, which can be understood as determining the coverage requirements of the service area according to the service demand of the first MBS. For example, if the service of the first MBS is a large-scale event, public safety broadcast or emergency broadcast, a larger service area is required; while the service of the first MBS for a specific user group (such as live broadcast) may only require a smaller service area.

[0108] In some implementations, the candidate service area list is determined based on the geographical location information of the NTN cell and the influence of the geographical location of the NTN cell on the propagation of the signal. For example, if the geographical location of the NTN cell is a plain with few obstructions, the influence on the propagation of the signal is small, and the coverage of the service area can be a larger area; if the geographical location of the NTN cell is a mountainous area or a densely built area, the influence on the propagation of the signal is large, and the coverage of the service area can be multiple smaller areas.

[0109] In some implementations, the priority of the candidate service area list is determined based on one or more of the following: density of target terminal devices; network load; coverage effect of the candidate service area. For example, the priority of each candidate service area in the candidate service area list can be sorted based on the density of target terminal devices in the candidate service area, the network load of the candidate service area, and the coverage effect of the candidate service area, and the priorities of different service areas are determined according to the sorting results, so as to select the final service area from the candidate service area list.

[0110] In order for the terminal device to determine the service area of ​​the first MBS of interest, it is necessary to establish an association between the service area and the first MBS session. In some implementations, the first association relationship is used to indicate the association relationship between the service area and the session of the first MBS. For example, the session of the first MBS is identified by a session ID and provided in multiple service areas, and the first association relationship indicates that the service area is associated with the session ID of the first MBS. The terminal device can determine the session ID of the first MBS corresponding to the service area based on the service area information and the first association relationship.

[0111] In some implementations, the first association relationship is used to indicate that a session of the first MBS is associated with one or more service areas.

[0112] In some implementations, the first association relationship indicates that a session ID of the first MBS is associated with one or more geographic area IDs of the service area. In this case, the first association relationship provides a finer regional granularity for the session of the first MBS, so that the terminal device can identify the available first MBS at its current location and the geographic area of ​​the first MBS of interest in the current resident cell.

[0113] In some implementations, the service area is associated with one or more first beams, and the first association relationship indicates an association relationship between the first beam and the first MBS. For example, the first association relationship indicates that a session ID of the first MBS is associated with one or more first beam IDs.

[0114] In some implementations, the first MBS session is associated with one or more contents of the first MBS, and the first association relationship is used to indicate the association relationship between the service area and the contents of the first MBS, that is, different contents of the same session of the first MBS may be distributed in different service areas. Accordingly, when the terminal device moves to a new service area, the content data of the first MBS from the new service area should be delivered to the terminal device, and the network device stops delivering the content data of the first MBS from the old service area to the terminal device.

[0115] In some scenarios, terminal devices in different regions may be interested in the same session of the first MBS (for example, a TV program). Although the content is the same, the sessions transmitted to these different regions need to be managed separately. Due to the different coverage and interference conditions in geographical regions, especially in the case of GEO satellites, the coverage area may be very large, for example, spanning more than 200 kilometers. It is difficult to imagine that there will be a service area that is so large that the first MBS needs. Therefore, it may be necessary to divide the first MBS session into multiple regional sessions to better adapt to the conditions of each region.

[0116] In some implementations, the session of the first MBS is associated with one or more regional sessions. For example, the session ID of the first MBS is associated with multiple different regional session IDs (Session_ID), and the regional session ID is combined with the first MBS session ID to uniquely identify a specific portion of the service area of ​​the content data of the first MBS in the 5G system (5G system, 5GS).

[0117] The NTN cell may provide services for multiple regional sessions (such as part of an NTN area) for the first MBS session, that is, sessions that simultaneously transmit the same content data to multiple users in a specific area. In some implementations, a regional session ID is associated with a content ID of the first MBS, that is, a regional session transmits content data corresponding to a content ID. This data transmission method is often used for broadcast content, such as video streaming, emergency alerts, etc.

[0118] For a location-dependent first MBS, multiple contents corresponding to the same session ID of the first MBS may be distributed in each sub-area. The regional session ID may be used to identify each distinguishable content of a session belonging to the first MBS. In some implementations, a session ID of the first MBS corresponds to one or more content IDs, that is, the network device may divide a session ID of the first MBS into multiple content IDs and send them to different regional session IDs.

[0119] The network device supports the distribution of the service area information of the first MBS related to the location, and the terminal device only knows the first MBS session ID (that is, the terminal device does not need to know the regional session ID). The network device needs to know the regional session ID, the content ID and the first MBS session ID. In some implementations, for different content IDs of the first MBS, the network device can obtain the corresponding regional session ID, content ID and related regional range.

[0120] In the above case, the terminal device should also be able to obtain relevant information of the content ID of the first MBS so that the relevant information can be applied to obtain the corresponding service area information. Since a service area may have one or more geographical area IDs, in some implementations, the first association relationship may be used to indicate one or more of the following: a geographical area ID of the service area is associated with a content ID of the first MBS; multiple geographical area IDs of the service area are associated with a content ID of the first MBS; and a geographical area ID of the service area is associated with multiple content IDs of the first MBS.

[0121] In some implementations, the multiple geographic area IDs of the service area can be understood as multiple geographic area IDs of one or more service areas of the first MBS in the NTN cell. For example, the multiple geographic area IDs are multiple geographic area IDs of one service area. For another example, the multiple geographic area IDs are multiple geographic area IDs of multiple service areas, where one service area can correspond to one or more geographic area IDs.

[0122] In some implementations, the multiple content IDs of the first MBS may be understood as multiple content IDs corresponding to one or more session IDs of the first MBS. For example, the multiple content IDs are multiple content IDs corresponding to one session ID. For another example, the multiple content IDs are multiple content IDs corresponding to multiple session IDs, where one content ID may correspond to one or more content IDs.

[0123] When a session of the first MBS needs to be transmitted in a wide area, in order to ensure that terminal devices in different areas can receive signals, it may be necessary to start sessions in different areas. In particular, in a multi-beam scenario, the area covered by each beam can be considered as a sub-area. In some implementations, the first association relationship indicates that a geographic area ID of the service area is associated with a content ID of the first MBS. For example, see Figure 6 The NTN cell includes four service areas, namely the first service area, the second service area, the third service area and the fourth service area. Each of the four service areas corresponds to a geographical area ID. The geographical area ID of a service area is associated with a content ID of the first MBS. Therefore, content data corresponding to four different content IDs of the first MBS can be transmitted in the four service areas respectively.

[0124] In some implementations, if the first association relationship indicates that a geographic area ID of the service area is associated with multiple content IDs of the first MBS, the terminal device may perform switching or cell reselection based on one or more of the following: geographic area ID; content ID; distance; service time. For example, the multiple content IDs of the first MBS have a certain order, such as 1, 2, 3...N content IDs. When the terminal device performs switching or cell reselection, it may not only perform switching or cell reselection based on distance and service time, but also perform switching or cell reselection based on the order of geographic area ID and / or content ID, or perform switching or cell reselection based on a combination of distance and service time and geographic area ID and / or content ID.

[0125] In some implementations, the first information is further used to indicate first indication information, and the first indication information is used to indicate an update of the service area information.

[0126] In some implementations, the first indication information is determined based on one or more of the following: service requirements of the first MBS; distribution of target terminal devices. For example, during the broadcasting process of the first MBS, the target terminal devices in the corresponding service area may change, or the service coverage area of ​​the first MBS changes, then it is necessary to adjust the service area corresponding to the first MBS (such as adjusting the beam coverage and broadcast range), that is, to update the service area information indicated by the first information. At this time, the first information may carry the first indication information. Accordingly, the terminal device receives the first information, obtains the first indication information, and can update its stored service area information to the updated service area information indicated by the current first information.

[0127] In some implementations, the first information is further used to indicate a frequency selection area identity (FSAI) corresponding to the session ID of the first MBS.

[0128] In some implementations, the first information is further used to indicate relevant information of the first MBS. For example, the first information indicates service information of the first MBS and relevant information of a session of the first MBS.

[0129] In some implementations, the first information is carried in system information blocks (SIB) and / or MBS broadcast configuration. For example, the first message is carried in SIB20 and / or SIB21. For another example, the first information is carried in MCCH composed of MBS broadcast configuration information elements (IE).

[0130] In some implementations, the first information is carried in SIB20. For example, the channel configuration information carried by SIB20 is the information required to obtain the MCCH / MTCH configuration of the first MBS broadcast. For another example, SIB20 carries a first association relationship, and the first association relationship can be one or more of the association relationships described above, such as the association relationship between the first beam and the first MBS, and this information is related to the service continuity of the first MBS broadcast reception. For another example, SIB20 carries service area information, such as the ID and physical layer information of the first beam, which can enable the terminal device to know which frequency or beam is providing the service of the first MBS.

[0131] In some implementations, the first information is carried in SIB21. For example, SIB21 includes FSAI associated with a session ID of the first MBS, and the session ID of the first MBS is configured by upper layer signaling of the network device.

[0132] In some implementations, the first information is carried on the MCCH. For example, the MCCH carries a list of all first MBSs in ongoing sessions transmitted on the MTCH and relevant information of the sessions of the first MBS, such as the session ID of the first MBS, the scheduling information of the relevant group radio network temporary identity (G-RNTI), etc. The MCCH may also carry channel configuration information, such as the MCCH may provide MCCH scheduling information for each session of the first MBS, or provide MCCH scheduling information of each different service area associated with each session of the first MBS related to each location. For another example, the service area information may be carried in the MBSBroadcastConfiguration message configuration transmitted on the MCCH, or the service area information may be included in the MBSBroadcastConfiguration message, or the service area information may be embedded in the MBS broadcast configuration IE transmitted on the MCCH. For another example, the first association relationship indicates the association relationship between the geographic area ID and the session ID of the first MBS, and the first association relationship may be carried in the MBSBroadcastConfiguration message transmitted on the MCCH, wherein multiple geographic area IDs may be associated with one or more session IDs of the first MBS.

[0133] In some implementations, the first information may also be carried in SIB25. For example, SIB25 carries geographic area information, such as coordinates of a reference position and an area radius, and the geographic area information is carried in CoverageAreaInfo IE, that is, the CoverageAreaInfo IE may indicate the geographic area of ​​the service area of ​​the first MBS.

[0134] In some implementations, the first indication information indicated by the first information is carried in a SIB, and the SIB may be broadcast periodically through a control channel, for example, the SIB carrying the first indication information is broadcast periodically through a physical downlink control channel (PDCCH).

[0135] In some other implementations, the first indication information indicated by the first information is unicast to a specific terminal device via a dedicated channel.

[0136] As described above, the service area may be associated with one or more first beams. When the coverage of the beam footprint of the first beam associated with the service area may be smaller than the service area, the terminal devices located in the service area may not be able to receive the content data of the first MBS. These terminal devices may be terminal devices that are not covered by the beam footprint of the first beam, and there may be a problem of how to behave for these terminal devices. In some implementations, if the terminal device cannot receive the content data of the first MBS in the service area, the terminal device may not need to perform special processing. In other implementations, the terminal device may perform beam reselection.

[0137] In some implementations, if a first condition is met, the terminal device reselects a beam based on the first information, and the first condition includes one or more of the following: the second beam currently paired with the terminal device is not associated with the first MBS; the second beam is associated with the first MBS, but the terminal device does not receive content data of the first MBS. The terminal device reselects a beam based on the first information, which helps to reduce the probability of transmission failure to achieve the best service quality.

[0138] In some implementations, the second beam is not associated with the first MBS, which may be understood as the second beam not supporting the first MBS.

[0139] In some implementations, the second beam is associated with the first MBS, which can be understood as the second beam supporting the first MBS.

[0140] In some implementations, whether the second beam is associated with the first MBS is determined based on the first information. For example, the first information indicates the first association information, and the first association relationship indicates that one or more first beams are associated with a session of the first MBS. If the one or more first beams do not include the second beam, it can be determined that the second beam is not associated with the first MBS. For another example, the first information indicates the first association information, and the first association relationship indicates that one or more first beams are associated with a session of the first MBS. If the one or more first beams include the second beam, it can be determined that the second beam is associated with the first MBS.

[0141] In some other implementations, whether the second beam is associated with the first MBS is determined based on the beam information corresponding to the second beam. For example, if the second beam carries the corresponding beam information and the beam information does not indicate the session of the first MBS, it can be determined that the second beam is not associated with the first MBS. For another example, if the second beam carries the corresponding beam information and the beam information indicates the session of the first MBS, it can be determined that the second beam is associated with the first MBS.

[0142] In some implementations, the terminal device performs beam reselection based on the first information, which can be understood as the terminal device determining the third beam reselected by the terminal device based on the predicted beam strength and the first information, and the predicted beam strength is used to indicate the predicted beam strength at a future moment. The terminal device can use the third beam as the receiving beam of the first MBS, which helps to improve the success rate of the terminal device receiving the first MBS, so as to improve the continuity of the service.

[0143] In some implementations, the predicted beam strength may be determined based on the measured beam strength obtained by the terminal device. For example, the terminal device may periodically re-evaluate whether the transmitting end beam on the network device side is suitable. Specifically, the network device scans the beam, and the terminal device performs beam measurement to obtain the measured beam strength corresponding to each beam.

[0144] In some implementations, the measured beam strength may be one or more of: layer 1 reference signal received power (L1-RSRP); reference signal received quality (RSRQ); received signal strength indication (RSSI); signal interference noise ratio (SINR).

[0145] In an embodiment of the present application, the predicted beam strength may be determined by a terminal device or a network device. For example, the terminal device determines the predicted beam results of M beams at time t in the future based on the M measured beam strengths. For another example, the terminal device reports the M measured beam strengths to the network device, and the network device determines the predicted beam results of M beams at time t in the future based on the M measured beam strengths.

[0146] In some implementations, the measured beam strength may be determined based on the measured strongest beam strength and the difference between the remaining beams and the strongest beam strength. For example, the measured beam strength is L1-RSRP, and the terminal device instructs the terminal device to report the measured reference signal or beam, and the L1-RSRP of the strongest beam. For the measurement of the remaining M-1 beams, the difference between the remaining M-1 beams and the strongest beam L1-RSRP is reported, and the network device may determine the L1-RSRP of the remaining M-1 beams based on the difference between the L1-RSRP of the strongest beam and the corresponding values ​​of the remaining M-1 beams.

[0147] In some implementations, the predicted beam strength includes predicted beam strengths of multiple beams, and the predicted beam strength of the i-th beam at time t is calculated by formula PBI i (t) = WBI i (k)+N*[WBI i (k)―WBI i (k―1)]; among them, WBI i (k) represents the measured beam intensity of the i-th beam at time k, WBI i (k-1) represents the measured beam intensity of the i-th beam at time k-1, N represents the time interval between time t and time k, WBI i (k) With WBI i (k-1) is the measured beam strength at the two moments closest to the i-th beam at moment t.

[0148] In order to facilitate the predicted beam strength, in some implementations, the terminal device and / or the network device may store the measured beam strength. For example, the terminal device is provided with a memory for storing the measured beam strength at the last two moments.

[0149] In some implementations, WBI i (k) With WBI i (k-1) is the measured beam strength of the i-th beam at the two moments closest to moment t. It can be understood that moment k and moment k-1 are the two moments closest to moment t among all moments stored in the terminal device and / or network device, among which moment k is closest to moment t, moment k-1 is the moment before moment k, and there is k moments before moment k-1 and moment t.

[0150] In some implementations, the measured beam strength is L1-RSRP, and the predicted beam strength of the ith beam at time t is given by the formula RSRP i (t) = RSRP i (k)+N*[RSRP i (k) RSRP i (k―1)]; where RSRP i (k) represents the L1-RSRP of the i-th beam at time k, RSRP i (k-1) represents the L1-RSRP of the i-th beam at time k-1, N represents the time interval between time t and time k, RSRP i (k) With RSRP i(k-1) is the L1-RSRP of the two moments closest to the i-th beam at moment t. For example, the strength reported by the terminal device at moment k on the received determined beam is the L1-RSRP of the strongest beam, as well as the difference between the M-1 remaining beams and the L1-RSRP of the strongest beam. The network device sets a memory to store the strength of the M beams reported by the terminal device at moment k as RSRP i , i=0,1,2…M-1, the memory can store the measured beam strengths at multiple times, but only the RSRP values ​​of the M beams at the most recent k time and k-1 time are used. The measured beam strength of the i-th beam at time k and k-1 can be expressed as RSRP i (k) and RSRP i (k―1), replacing WBI in the above formula i (k) and WBI i (k―1), then the predicted beam strength of the i-th beam at time t can be calculated by the formula ESRP i (t) = RSRP i (k)+N*[RSRP i (k) RSRP i (k―1)] is determined, the predicted L1-RSRP of the M beams at time t can be obtained.

[0151] In other implementations, the predicted beam strength may be predicted by a terminal device or a network device through an artificial intelligence / machine learning (AI / ML) model, and the measured beam strength is the input of the AI / ML model. For example, taking the example of a network device determining the predicted beam strength through an AI / ML model, the network device side collects sufficient measured beam strengths for model training, and when the model converges and the predicted performance indicators meet the requirements, it enters the model reasoning stage. At this point, the network device side can use set B as a measurement set for channel state information (CSI) resource and report configuration, and the network device scans the beams in set B according to the resource configuration. The terminal device measures the current resource set and reports the measured beam strength to the network device. The network device uses the measured beam strength fed back by the terminal device as the input of the AI / ML model, and the trained model infers based on the input, and outputs the predicted beam strength corresponding to the beam in set B.

[0152] In some implementations, the predicted beam strength includes predicted beam strengths of multiple beams, the service area indicated by the first information is associated with one or more first beams, and if the multiple beams include one or more first beams, the first beam with the largest predicted beam strength among the one or more first beams is the third beam. For example, the measured beam strength is L1-RSRP, the measured beam strength includes predicted beam strengths of M beams, and [RSRP i (t)] i＝0,1…M―1 Represents the predicted RSRP value sequence of M beams at time t. Sort the value sequence and select the beam with the largest RSRP value at time t, that is, solve max|RSRP i (t)|corresponding beam, if the beam is not the first beam (such as the ID of the beam is not associated with the session of the first MBS), then select the second largest beam in the value sequence to determine whether it is the first beam, and so on, until the third beam is selected.

[0153] In the embodiment of the present application, the third beam may also be determined by the network device side. For example, the network device predicts that the beam of the first MBS received by the terminal device at time t may be the third beam, so the beam of the first MBS may be adjusted to the third beam to improve resource utilization.

[0154] As described above, a service area is associated with a session of the first MBS, and a service area may include one or more geographical areas. Therefore, even if it is the same session of the first MBS, it may need to be managed and transmitted separately in different geographical areas.

[0155] In some implementations, if the first association relationship indicates that a session of the first MBS is associated with a geographical area of ​​one or more service areas, the transmission method of the content data corresponding to the session of the first MBS is determined based on one or more of the following: the session ID of the first MBS; the geographical area ID of the service area; one or more first beam IDs associated with the service area; and the transmission time offset.

[0156] In some implementations, the transmission method of the content data corresponding to the session of the first MBS includes one or more of the following: the content data corresponding to a session ID of the first MBS is transmitted in an area corresponding to a geographical area ID; the content data corresponding to a session ID of the first MBS is transmitted in areas corresponding to some geographical area IDs; the content data corresponding to a session ID of the first MBS is transmitted simultaneously in areas corresponding to all geographical area IDs; a geographical area ID corresponds to a transmission time offset, and the content data corresponding to a session ID of the first MBS is transmitted in areas corresponding to all geographical area IDs based on the transmission time offset; a first beam ID corresponds to a geographical area ID, a first beam ID corresponds to a transmission time offset, and the content data corresponding to a session ID of the first MBS is transmitted on one or more first beam IDs based on the transmission time offset.

[0157] In some implementations, the transmission mode of the content data corresponding to the session of the first MBS is determined based on the session ID of the first MBS and the geographic area ID of the service area. It can be understood that the transmission mode of the content data corresponding to the session of the first MBS includes: the content data corresponding to a session ID of the first MBS is transmitted in an area corresponding to a geographic area ID, that is, different geographic area IDs transmit different content data corresponding to the first MBS session. For example, see Figure 6 There are 4 service areas in the NTN cell, namely the first service area, the second service area, the third service area and the fourth service area. Each service area includes a geographical area ID, so the NTN cell corresponds to 4 geographical area IDs. Areas corresponding to different geographical area IDs can transmit content data corresponding to different session IDs of the first MBS, that is, content data corresponding to a session of the first MBS can be transmitted in an area corresponding to one of the geographical area IDs.

[0158] In some implementations, the transmission mode of the content data corresponding to the session of the first MBS is determined based on the session ID of the first MBS and the geographical area ID of the service area. It can be understood that the transmission mode of the content data corresponding to the session of the first MBS includes: the content data corresponding to a session ID of the first MBS is transmitted in the area corresponding to some geographical area IDs of a service area. For example, a service area includes 3 geographical area IDs, and the content data corresponding to a session ID of the first MBS is transmitted in the area corresponding to one of the geographical area IDs. For another example, the first MBS is ETWS, and the terminal device within the coverage of the first MBS needs to determine whether emergency action is required after receiving the content data of the first MBS. If the satellite coverage area consists of one or more NTN cells, and each NTN cell covers a large area, the ETWS in the NTN network can only be associated with certain geographical areas, that is, the content data corresponding to a session ID of the ETWS can only be transmitted in the area corresponding to certain geographical area IDs of the NTN cell.

[0159] In some implementations, the above-mentioned partial geographic area ID may be specified, for example, the partial geographic area ID specified by the network device carried in SIB6.

[0160] In some implementations, the partial geographic area ID may be determined based on the first beam ID. For example, a service area is associated with five first beams, and the partial geographic area IDs in the geographic area IDs included in the service area may be determined based on the IDs of three of the first beams.

[0161] In some implementations, the transmission mode of the content data corresponding to the session of the first MBS is determined based on the session ID of the first MBS and the geographic area ID of the service area. It can be understood that the transmission mode of the content data corresponding to the session of the first MBS includes: the content data corresponding to a session ID of the first MBS is transmitted simultaneously in the areas corresponding to all the geographic area IDs. For example, if the first association relationship indicates that the session ID of the first MBS is associated with all the geographic area IDs of the service area, the content data corresponding to a session ID of the first MBS can be transmitted simultaneously in the areas corresponding to all the geographic area IDs.

[0162] In some implementations, the transmission method of the content data corresponding to the session of the first MBS is determined based on the session ID of the first MBS, the geographical area ID of the service area, and the transmission time offset. It can be understood that the transmission method of the content data corresponding to the session of the first MBS includes: one geographical area ID corresponds to one transmission time offset, and the content data corresponding to a session ID of the first MBS is transmitted in the areas corresponding to all geographical area IDs based on the transmission time offset.

[0163] In some implementations, the transmission time offset corresponding to the geographic area ID is determined based on the size of the geographic area ID. For example, the larger the geographic area ID, the larger the transmission time offset corresponding to the geographic area ID; the larger the geographic area ID, the smaller the transmission time offset corresponding to the geographic area ID. For another example, a random factor is added to the geographic area ID as the transmission time offset corresponding to the geographic area ID.

[0164] In some implementations, the transmission method of the content data corresponding to the session of the first MBS is determined based on the session ID of the first MBS, the geographic area ID of the service area, the first beam ID, and the transmission time offset. It can be understood that the transmission method of the content data corresponding to the session of the first MBS includes: a first beam ID corresponds to a geographic area ID, a first beam ID corresponds to a transmission time offset, and the content data corresponding to a session ID of the first MBS is transmitted on the first beam corresponding to one or more first beam IDs based on the transmission time offset.

[0165] In some implementations, a transmission method of content data corresponding to a session of the first MBS is determined based on a session ID of the first MBS, a geographic area ID of a service area, a first beam ID, and a transmission time offset. The transmission method of content data corresponding to a session of the first MBS includes: one first beam ID corresponds to one geographic area ID, one first beam ID corresponds to one transmission time offset, content data corresponding to a session ID of the first MBS is transmitted on one or more first beam IDs based on the transmission time offset; and content data corresponding to a session ID of the first MBS is transmitted in an area corresponding to a geographic area ID. For example, one first beam ID corresponds to one geographic area ID, a random number is added to each first beam ID as the transmission time offset corresponding to the first beam ID, and the time for transmitting content data corresponding to the session ID of the first MBS on first beams corresponding to multiple first beam IDs corresponding to some geographic area IDs can be determined based on the transmission time offset.

[0166] As mentioned above, there may be multiple service areas within the coverage of the NTN cell. For example, the coverage of the NTN cell may overlap with two regions, and the first MBS may be intended to cover one of the two regions. The session ID of the first MBS may be associated with multiple service areas, and vice versa. The session ID of the first MBS associated with the first MBS service may be provided by the MBSBroadcastConfiguration message. It may depend on the network device to indicate whether only the terminal device located in the service area is allowed to receive the content data of the first MBS.

[0167] In some implementations, at a first time, the terminal device establishes or releases the MRB associated with the session of the first MBS. That is, if the network device indicates that acquisition of the session of the first MBS is allowed only in the service area, the terminal device interested in the session of the first MBS can establish or release the MRB associated with the session of the first MBS at the first time.

[0168] In some implementations, the first opportunity may include one or more of the following: when a session of the first MBS is started; when entering a service area of ​​the first MBS of interest to the terminal device and being interested in the ongoing broadcast service of the first MBS; when removing a capability limitation of the terminal device that inhibits the terminal device from receiving the ongoing broadcast service of the first MBS, and in the process of applying a broadcast MRB establishment; when acquiring location information of the terminal device; and when updating the service area.

[0169] In some implementations, the location information of the terminal device may be understood as global navigation satellite system (GNSS) information related to the location of the terminal device.

[0170] In some implementations, the first opportunity includes when acquiring the location information of the terminal device. For example, based on the instruction of the network device, when the terminal device is not allowed to receive the session of the first MBS outside the service area, the terminal device determines whether to establish or release the established MRB while acquiring the location information of the terminal device. Specifically, when the terminal device acquires its location information, the terminal device can check whether it is entering or exiting the service area, and based on whether it is entering or exiting the service area, establish or release the MRB associated with the session of the first MBS limited to the service area. If the terminal device detects that it has exited the service area, it can release the MRB associated with the session that has been established or not established for the first MBS limited to the service area; if the terminal device has not established the MRB, when it is detected that the terminal device has entered the service area, the terminal device can establish the MRB associated with the session of the first MBS limited to the service area.

[0171] In some implementations, if the terminal device can receive content data of the first MBS and its location is within the service area, the terminal device is allowed to establish the MRB.

[0172] In some implementations, the terminal device may determine whether to discard the MRB based on the second information, or in other words, the terminal device may determine whether to delete the MRB connection based on the second information.

[0173] In some implementations, the second information is used to indicate one or more of the following: the time elapsed after the terminal device left the service area; the distance traveled after the terminal device left the service area; the content provided by the service area adjacent to the first MBS; and whether the terminal device is interested in the content provided by the service area adjacent to the first MBS.

[0174] In some implementations, the terminal device may determine whether to discard the MRB after leaving the service area or when at the boundary of the service area.

[0175] In some implementations, the terminal device with NTN capability determines the geographic area information based on the first information to determine whether it has left or entered the service area, or is at the boundary of the service area. For example, the first information is used to indicate the service area information, and the service area information includes the geographic area information, which can indicate the geographic information or boundary information of the service area. The terminal device may obtain its own location information through GNSS or other location information services to determine whether it has left or entered the service area, or is at the boundary of the service area.

[0176] Combination of the above Figures 1 to 6 , describes the method embodiment of the present application in detail, and the following is combined with Figures 7 to 9 , describes the device embodiment of the present application in detail. It should be understood that the description of the method embodiment corresponds to the description of the device embodiment, so the parts not described in detail can refer to the previous method embodiment.

[0177] Figure 7 7 is a schematic diagram of a terminal device according to an embodiment of the present application. The terminal device 700 includes a receiving unit 710 .

[0178] The receiving unit 710 is used to receive first information sent by a network device, where the first information is used to indicate one or more of the following: service area information, where the service area information is used to indicate a service area of ​​a first multicast broadcast service MBS within a non-terrestrial network NTN cell; channel configuration information, where the channel configuration information is used to indicate configuration information of a channel carrying the first MBS within the service area; and a first association relationship, where the first association relationship is used to indicate an association relationship between the service area and the first MBS.

[0179] In some implementations, the service area information includes geographic area information, and the geographic area information includes one or more of the following: a reference location; an area radius; a reference time; and associated information of the geographic area.

[0180] In some implementations, the service area is associated with one or more first beams, the first association relationship indicates an association relationship between the first beam and the first MBS, and the service area information includes one or more of the following: an identifier of the first beam; physical layer information of the first beam.

[0181] In some implementations, the first beam is determined based on one or more of: antenna parameters; service requirements of terminal devices covered by the beam footprint; and the geographic area of ​​the service area.

[0182] In some implementations, the terminal device further includes: a reselection unit, and if a first condition is met, the reselection unit is used to reselect the beam based on the first information, and the first condition includes one or more of the following: the second beam currently paired with the terminal device is not associated with the first MBS; the second beam is associated with the first MBS, but the terminal device has not received the content data of the first MBS.

[0183] In some implementations, the terminal device performs beam reselection based on the first information, including: the terminal device determines a third beam for reselection by the terminal device based on predicted beam strength and the first information, wherein the predicted beam strength is used to indicate the predicted beam strength at a future moment.

[0184] In some implementations, the determining of the third beam based on the predicted beam strength and the first information includes: the predicted beam strength includes predicted beam strengths of multiple beams, the service area indicated by the first information is associated with one or more first beams, and if the multiple beams include one or more of the first beams, then the first beam with the largest predicted beam strength among the one or more first beams is the third beam.

[0185] In some implementations, the predicted beam strength is determined based on a measured beam strength measured by the terminal device.

[0186] In some implementations, the predicted beam strength is determined based on the measured beam strength measured by the terminal device, including: the predicted beam strength includes predicted beam strengths of multiple beams, and the predicted beam strength of the i-th beam at time t is determined by formula PBI i (t) = WBI i (k)+N*[WBI i (k)―WBI i (k―1)]; among them, WBI i (k) represents the measured beam intensity of the i-th beam at time k, WBI i(k-1) represents the measured beam intensity of the i-th beam at time k-1, N represents the time interval between time t and time k, WBI i (k) With WBI i (k-1) is the measured beam intensity of the i-th beam at the two moments closest to the moment t.

[0187] In some implementations, the service area is determined based on the priority of a candidate service area list, and the candidate service area list is determined based on one or more of the following: distribution of target terminal devices, where the target terminal devices are terminal devices that have demand for the first MBS; service demand for the first MBS; geographic location information of the NTN cell; and impact of the geographic location of the NTN cell on signal propagation.

[0188] In some implementations, the priority of the candidate service area list is determined based on one or more of the following: the density of the target terminal device; the network load; and the coverage effect of the candidate service area.

[0189] In some implementations, the first association relationship indicates that the session of the first MBS is associated with one or more geographical areas of the service area, and the transmission method of the content data corresponding to the session of the first MBS is determined based on one or more of the following: the session identity identifier ID of the first MBS; the geographical area ID of the service area; one or more first beam IDs associated with the service area; and a transmission time offset.

[0190] In some implementations, the transmission method of the content data corresponding to the session of the first MBS includes one or more of the following: the content data corresponding to a session ID of the first MBS is transmitted in an area corresponding to the geographical area ID; the content data corresponding to a session ID of the first MBS is transmitted in areas corresponding to some of the geographical area IDs; the content data corresponding to a session ID of the first MBS is simultaneously transmitted in areas corresponding to all of the geographical area IDs; one geographical area ID corresponds to one transmission time offset, and the content data corresponding to a session ID of the first MBS is transmitted in areas corresponding to all of the geographical area IDs based on the transmission time offset; one first beam ID corresponds to one geographical area ID, one first beam ID corresponds to one transmission time offset, and the content data corresponding to a session ID of the first MBS is transmitted on the first beam corresponding to one or more first beam IDs based on the transmission time offset.

[0191] In some implementations, if the first association relationship is used to indicate an association relationship between the service area and the content of the first MBS, the first association relationship indicates one or more of the following: a geographic area ID of the service area is associated with a content ID of the first MBS; multiple geographic area IDs of the service area are associated with a content ID of the first MBS; one geographic area ID of the service area is associated with multiple content IDs of the first MBS.

[0192] In some implementations, the first information is further used to indicate first indication information, and the first indication information is used to indicate an update of the service area information.

[0193] In some implementations, the first indication information is determined based on one or more of the following: service requirements of the first MBS; and distribution of the target terminal devices.

[0194] In some implementations, the first information is carried in a system information block SIB and / or an MBS broadcast configuration.

[0195] Figure 8 800 is a schematic diagram of a network device according to an embodiment of the present application. The network device 800 includes a sending unit 810 .

[0196] A sending unit 810 is used to send first information to a terminal device, where the first information is used to indicate one or more of the following: service area information, where the service area information is used to indicate a service area of ​​a first multicast broadcast service MBS within a non-terrestrial network NTN cell; channel configuration information, where the channel configuration information is used to indicate configuration information of a channel carrying the first MBS within the service area; and a first association relationship, where the first association relationship is used to indicate an association relationship between the service area and the first MBS.

[0197] In some implementations, the service area information includes geographic area information, and the geographic area information includes one or more of the following: a reference location; an area radius; a reference time; and associated information of the geographic area.

[0198] In some implementations, the service area is associated with one or more first beams, the first association relationship indicates an association relationship between the first beam and the first MBS, and the service area information includes one or more of the following: an identifier of the first beam; physical layer information of the first beam.

[0199] In some implementations, the first beam is determined based on one or more of: antenna parameters; service requirements of terminal devices covered by the beam footprint; and the geographic area of ​​the service area.

[0200] In some implementations, the network device further includes: a determination unit, configured to determine a third beam to be reselected by the terminal device based on a predicted beam strength and the first information, wherein the predicted beam strength is used to indicate a predicted beam strength at a future moment.

[0201] In some implementations, the determining of the third beam based on the predicted beam strength and the first information includes: the predicted beam strength includes predicted beam strengths of multiple beams, the service area indicated by the first information is associated with one or more first beams, and if the multiple beams include one or more of the first beams, then the first beam with the largest predicted beam strength among the one or more first beams is the third beam.

[0202] In some implementations, the predicted beam strength is determined based on a measured beam strength measured by the terminal device.

[0203] In some implementations, the predicted beam strength is determined based on the measured beam strength measured by the terminal device, including: the predicted beam strength includes predicted beam strengths of multiple beams, and the predicted beam strength of the i-th beam at time t is determined by formula PBI i (t) = WBI i (k)+N*[WBI i (k)―WBI i (k―1)]; among them, WBI i (k) represents the measured beam intensity of the i-th beam at time k, WBI i (k-1) represents the measured beam intensity of the i-th beam at time k-1, N represents the time interval between time t and time k, WBI i (k) With WBI i (k-1) is the measured beam intensity of the i-th beam at the two moments closest to the moment t.

[0204] In some implementations, the service area is determined based on the priority of a candidate service area list, and the candidate service area list is determined based on one or more of the following: distribution of target terminal devices, where the target terminal devices are terminal devices that have demand for the first MBS; service demand for the first MBS; geographic location information of the NTN cell; and impact of the geographic location of the NTN cell on signal propagation.

[0205] In some implementations, the priority of the candidate service area list is determined based on one or more of the following: the density of the target terminal device; the network load; and the coverage effect of the candidate service area.

[0206] In some implementations, the first association relationship indicates that the session of the first MBS is associated with one or more geographical areas of the service area, and the transmission method of the content data corresponding to the session of the first MBS is determined based on one or more of the following: the session identity identifier ID of the first MBS; the geographical area ID of the service area; one or more first beam IDs associated with the service area; and a transmission time offset.

[0207] In some implementations, the transmission method of the content data corresponding to the session of the first MBS includes one or more of the following: the content data corresponding to a session ID of the first MBS is transmitted in an area corresponding to the geographical area ID; the content data corresponding to a session ID of the first MBS is transmitted in areas corresponding to some of the geographical area IDs; the content data corresponding to a session ID of the first MBS is simultaneously transmitted in areas corresponding to all of the geographical area IDs; one geographical area ID corresponds to one transmission time offset, and the content data corresponding to a session ID of the first MBS is transmitted in areas corresponding to all of the geographical area IDs based on the transmission time offset; one first beam ID corresponds to one geographical area ID, one first beam ID corresponds to one transmission time offset, and the content data corresponding to a session ID of the first MBS is transmitted on the first beam corresponding to one or more first beam IDs based on the transmission time offset.

[0208] In some implementations, if the first association relationship is used to indicate an association relationship between the service area and the content of the first MBS, the first association relationship indicates one or more of the following: a geographic area ID of the service area is associated with a content ID of the first MBS; multiple geographic area IDs of the service area are associated with a content ID of the first MBS; one geographic area ID of the service area is associated with multiple content IDs of the first MBS.

[0209] In some implementations, the first information is further used to indicate first indication information, and the first indication information is used to indicate an update of the service area information.

[0210] In some implementations, the first indication information is determined based on one or more of the following: service requirements of the first MBS; and distribution of the target terminal devices.

[0211] In some implementations, the first information is carried in a system information block SIB and / or an MBS broadcast configuration.

[0212] In an optional embodiment, the receiving unit 710 may be a transceiver 930. The terminal device 700 may further include a processor 910 and a memory 920. Fig. 9 shown.

[0213] In an optional embodiment, the sending unit 810 may be a transceiver 930. The network device 800 may further include a processor 910 and a memory 920. Fig. 9 shown.

[0214] Fig. 9 It is a schematic structural diagram of a communication device according to an embodiment of the present application. Fig. 9 The dotted line in the figure indicates that the unit or module is optional. The device 900 can be used to implement the method described in the above method embodiment. The device 900 can be a chip, a terminal device or a network device.

[0215] The device 900 may include one or more processors 910. The processor 910 may support the device 900 to implement the method described in the foregoing method embodiment. The processor 910 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 also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0216] The apparatus 900 may further include one or more memories 920. The memory 920 stores a program, which can be executed by the processor 910, so that the processor 910 executes the method described in the above method embodiment. The memory 920 may be independent of the processor 910 or integrated in the processor 910.

[0217] The apparatus 900 may further include a transceiver 930. The processor 910 may communicate with other devices or chips through the transceiver 930. For example, the processor 910 may transmit and receive data with other devices or chips through the transceiver 930.

[0218] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0219] The embodiment of 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 terminal or network device provided in the embodiment of the present application, and the program enables the computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0220] The embodiment of the present application also provides a computer program. The computer program can be applied to the terminal or network device provided in the embodiment of the present application, and the computer program enables a computer to execute the method executed by the terminal or network device in each embodiment of the present application.

[0221] 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 the present application, and are not intended to limit the present 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 of their variations are intended to cover non-exclusive inclusions.

[0222] In the embodiments of the present application, the "indication" mentioned can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.

[0223] In the embodiments of the present application, the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship of indication and being indicated, configuration and being configured, etc.

[0224] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communication 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.

[0225] In the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. 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 article generally indicates that the associated objects before and after are in an "or" relationship.

[0226] In the several embodiments provided in the present 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 only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, 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.

[0227] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0228] 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.

[0229] 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 may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may 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 may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may 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. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0230] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A wireless communication method, characterized in that: include: The terminal device receives first information sent by the network device, where the first information is used to indicate one or more of the following: Service area information, where the service area information is used to indicate a service area of ​​a first multicast broadcast service MBS in a non-terrestrial network NTN cell; Channel configuration information, where the channel configuration information is used to indicate configuration information of a channel carrying the first MBS in the service area; A first association relationship is used to indicate an association relationship between the service area and the first MBS.

2. The method according to claim 1, characterized in that The service area information includes geographical area information, and the geographical area information includes one or more of the following: Reference location; Area radius; Reference time; Information associated with a geographic area.

3. The method according to claim 1 or 2, characterized in that The service area is associated with one or more first beams, the first association relationship indicates an association relationship between the first beam and the first MBS, and the service area information includes one or more of the following: an identifier of the first beam; Physical layer information of the first beam.

4. The method according to claim 3, characterized in that The first beam is determined based on one or more of the following: Antenna parameters; The service requirements of the terminal devices covered by the beam footprint; The geographic area of ​​the service area.

5. The method according to any one of claims 1 to 4, characterized in that The method further comprises: If a first condition is met, the terminal device performs beam reselection based on the first information, where the first condition includes one or more of the following: The second beam currently paired with the terminal device is not associated with the first MBS; The second beam is associated with the first MBS, but the terminal device does not receive content data of the first MBS.

6. The method according to claim 5, characterized in that The terminal device performs beam reselection based on the first information, including: The terminal device determines a third beam reselected by the terminal device based on predicted beam strength and the first information, where the predicted beam strength is used to indicate the predicted beam strength at a future moment.

7. The method according to claim 6, characterized in that The determining the third beam based on the predicted beam strength and the first information comprises: The predicted beam strength includes predicted beam strengths of multiple beams. The service area indicated by the first information is associated with one or more first beams. If the multiple beams include one or more first beams, the first beam with the largest predicted beam strength among the one or more first beams is the third beam.

8. The method according to claim 6 or 7, characterized in that The predicted beam strength is determined based on the measured beam strength measured by the terminal device.

9. The method according to claim 8, characterized in that The predicted beam strength is determined based on the measured beam strength measured by the terminal device, including: The predicted beam strength includes predicted beam strengths of multiple beams. The predicted beam strength of the i-th beam at time t is calculated by formula PBI i (t) = WBI i (k)+N*[WBI i (k)―WNI i (k―1)] determined; Among them, WBI i (k) represents the measured beam intensity of the i-th beam at time k, WBI i (k-1) represents the measured beam intensity of the i-th beam at time k-1, N represents the time interval between time t and time k, WNI i (k) With WNI i (k-1) is the measured beam intensity of the i-th beam at the two moments closest to the moment t.

10. The method according to any one of claims 1 to 9, characterized in that The service area is determined based on the priority of a candidate service area list, and the candidate service area list is determined based on one or more of the following: distribution of target terminal devices, where the target terminal devices are terminal devices that have a demand for the first MBS; service requirements of the first MBS; Geographical location information of the NTN cell; The impact of the geographical location of the NTN cell on signal propagation.

11. The method according to claim 10, characterized in that The priority of the candidate service area list is determined based on one or more of the following: The density of the target terminal devices; Network load; The coverage effect of the candidate service area.

12. The method according to any one of claims 1 to 11, characterized in that The first association relationship indicates that the session of the first MBS is associated with one or more geographical areas of the service area, and the transmission mode of the content data corresponding to the session of the first MBS is determined based on one or more of the following: A session identifier ID of the first MBS; The geographic area ID of the service area; One or more first beam IDs associated with the service area; Transmission time offset.

13. The method according to claim 12, characterized in that The transmission mode of the content data corresponding to the session of the first MBS includes one or more of the following: The content data corresponding to a session ID of the first MBS is transmitted in an area corresponding to the geographical area ID; The content data corresponding to a session ID of the first MBS is transmitted in an area corresponding to a portion of the geographical area IDs; The content data corresponding to a session ID of the first MBS is transmitted simultaneously in the areas corresponding to all the geographical area IDs; One of the geographic area IDs corresponds to one of the transmission time offsets, and content data corresponding to one of the session IDs of the first MBS is transmitted in all areas corresponding to the geographic area IDs based on the transmission time offset; One of the first beam IDs corresponds to one of the geographic area IDs, one of the first beam IDs corresponds to one of the transmission time offsets, and content data corresponding to one of the session IDs of the first MBS is transmitted on the first beams corresponding to one or more of the first beam IDs based on the transmission time offset.

14. The method according to any one of claims 1 to 13, characterized in that If the first association relationship is used to indicate an association relationship between the service area and the content of the first MBS, the first association relationship indicates one or more of the following: A geographical area ID of the service area is associated with a content ID of the first MBS; Associating a plurality of geographic area IDs of the service area with a content ID of the first MBS; A geographical area ID of the service area is associated with a plurality of content IDs of the first MBS.

15. The method according to any one of claims 1 to 14, characterized in that The first information is further used to indicate first indication information, and the first indication information is used to indicate an update of the service area information.

16. The method according to claim 15, characterized in that The first indication information is determined based on one or more of the following: service requirements of the first MBS; The distribution of the target terminal devices.

17. The method according to any one of claims 1 to 16, characterized in that The first information is carried in a system information block SIB and / or an MBS broadcast configuration.

18. A wireless communication method, characterized in that: include: The network device sends first information to the terminal device, where the first information is used to indicate one or more of the following: Service area information, where the service area information is used to indicate a service area of ​​a first multicast broadcast service MBS in a non-terrestrial network NTN cell; Channel configuration information, where the channel configuration information is used to indicate configuration information of a channel carrying the first MBS in the service area; A first association relationship is used to indicate an association relationship between the service area and the first MBS.

19. The method according to claim 18, characterized in that The service area information includes geographical area information, and the geographical area information includes one or more of the following: Reference location; Area radius; Reference time; Information associated with a geographic area.

20. The method according to claim 18 or 19, characterized in that The service area is associated with one or more first beams, the first association relationship indicates an association relationship between the first beam and the first MBS, and the service area information includes one or more of the following: an identifier of the first beam; Physical layer information of the first beam.

21. The method of claim 20, wherein: The first beam is determined based on one or more of the following: Antenna parameters; The service requirements of the terminal devices covered by the beam footprint; The geographic area of ​​the service area.

22. The method according to any one of claims 18 to 21, characterized in that The method further comprises: The network device determines the third beam to be reselected by the terminal device based on the predicted beam strength and the first information, where the predicted beam strength is used to indicate the predicted beam strength at a future moment.

23. The method of claim 22, wherein: The determining the third beam based on the predicted beam strength and the first information comprises: The predicted beam strength includes predicted beam strengths of multiple beams. The service area indicated by the first information is associated with one or more first beams. If the multiple beams include one or more first beams, the first beam with the largest predicted beam strength among the one or more first beams is the third beam.

24. The method according to claim 22 or 23, characterized in that The predicted beam strength is determined based on the measured beam strength measured by the terminal device.

25. The method of claim 24, wherein: The predicted beam strength is determined based on the measured beam strength measured by the terminal device, including: The predicted beam strength includes predicted beam strengths of multiple beams. The predicted beam strength of the i-th beam at time t is calculated by formula PBI i (t) = WNI i (k)+N*[WBI i (k)―WBI i (k―1)] determined; Among them, WBI i (k) represents the measured beam intensity of the i-th beam at time k, WBI i (k-1) represents the measured beam intensity of the i-th beam at time k-1, N represents the time interval between time t and time k, WBI i (k) With WBI i (k-1) is the measured beam intensity of the i-th beam at the two moments closest to the moment t.

26. The method according to any one of claims 18 to 25, characterized in that The service area is determined based on the priority of a candidate service area list, and the candidate service area list is determined based on one or more of the following: distribution of target terminal devices, where the target terminal devices are terminal devices that have a demand for the first MBS; service requirements of the first MBS; Geographical location information of the NTN cell; The impact of the geographical location of the NTN cell on signal propagation.

27. The method of claim 26, wherein: The priority of the candidate service area list is determined based on one or more of the following: The density of the target terminal devices; Network load; The coverage effect of the candidate service area.

28. The method according to any one of claims 18 to 27, characterized in that The first association relationship indicates that the session of the first MBS is associated with one or more geographical areas of the service area, and the transmission mode of the content data corresponding to the session of the first MBS is determined based on one or more of the following: A session identifier ID of the first MBS; The geographic area ID of the service area; One or more first beam IDs associated with the service area; Transmission time offset.

29. The method of claim 28, wherein: The transmission mode of the content data corresponding to the session of the first MBS includes one or more of the following: The content data corresponding to a session ID of the first MBS is transmitted in an area corresponding to the geographical area ID; The content data corresponding to a session ID of the first MBS is transmitted in an area corresponding to a portion of the geographical area IDs; The content data corresponding to a session ID of the first MBS is transmitted simultaneously in the areas corresponding to all the geographical area IDs; One of the geographic area IDs corresponds to one of the transmission time offsets, and content data corresponding to one of the session IDs of the first MBS is transmitted in all areas corresponding to the geographic area IDs based on the transmission time offset; One of the first beam IDs corresponds to one of the geographic area IDs, one of the first beam IDs corresponds to one of the transmission time offsets, and content data corresponding to one of the session IDs of the first MBS is transmitted on the first beams corresponding to one or more of the first beam IDs based on the transmission time offset.

30. The method according to any one of claims 18 to 29, characterized in that If the first association relationship is used to indicate an association relationship between the service area and the content of the first MBS, the first association relationship indicates one or more of the following: A geographical area ID of the service area is associated with a content ID of the first MBS; Associating a plurality of geographic area IDs of the service area with a content ID of the first MBS; A geographical area ID of the service area is associated with a plurality of content IDs of the first MBS.

31. The method according to any one of claims 18 to 30, characterized in that The first information is further used to indicate first indication information, and the first indication information is used to indicate an update of the service area information.

32. The method of claim 31, wherein: The first indication information is determined based on one or more of the following: service requirements of the first MBS; The distribution of the target terminal devices.

33. The method according to any one of claims 18 to 32, characterized in that The first information is carried in a system information block SIB and / or an MBS broadcast configuration.

34. A terminal device, characterized in that: include: A receiving unit, configured to receive first information sent by a network device, wherein the first information is used to indicate one or more of the following: Service area information, where the service area information is used to indicate a service area of ​​a first multicast broadcast service MBS in a non-terrestrial network NTN cell; Channel configuration information, where the channel configuration information is used to indicate configuration information of a channel carrying the first MBS in the service area; A first association relationship is used to indicate an association relationship between the service area and the first MBS.

35. The terminal device according to claim 34, characterized in that: The service area information includes geographical area information, and the geographical area information includes one or more of the following: Reference location; Area radius; Reference time; Information associated with a geographic area.

36. The terminal device according to claim 34 or 35, characterized in that: The service area is associated with one or more first beams, the first association relationship indicates an association relationship between the first beam and the first MBS, and the service area information includes one or more of the following: an identifier of the first beam; Physical layer information of the first beam.

37. The terminal device according to claim 36, characterized in that: The first beam is determined based on one or more of the following: Antenna parameters; The service requirements of the terminal devices covered by the beam footprint; The geographic area of ​​the service area.

38. The terminal device according to any one of claims 34 to 37, characterized in that: The terminal device further includes: A reselection unit, wherein if a first condition is met, the reselection unit is used to perform beam reselection based on the first information, where the first condition includes one or more of the following: The second beam currently paired with the terminal device is not associated with the first MBS; The second beam is associated with the first MBS, but the terminal device does not receive content data of the first MBS.

39. The terminal device according to claim 38, characterized in that: The terminal device performs beam reselection based on the first information, including: The terminal device determines a third beam reselected by the terminal device based on predicted beam strength and the first information, where the predicted beam strength is used to indicate the predicted beam strength at a future moment.

40. The terminal device according to claim 39, characterized in that: The determining the third beam based on the predicted beam strength and the first information comprises: The predicted beam strength includes predicted beam strengths of multiple beams. The service area indicated by the first information is associated with one or more first beams. If the multiple beams include one or more first beams, the first beam with the largest predicted beam strength among the one or more first beams is the third beam.

41. The terminal device according to claim 39 or 40, characterized in that: The predicted beam strength is determined based on the measured beam strength measured by the terminal device.

42. The terminal device according to claim 41, characterized in that The predicted beam strength is determined based on the measured beam strength measured by the terminal device, including: The predicted beam strength includes predicted beam strengths of multiple beams. The predicted beam strength of the i-th beam at time t is calculated by formula PBI i (t) = WBI i (k)+N*[WBI i (k)―WBI i (k―1)] determined; Among them, WBI i (k) represents the measured beam intensity of the i-th beam at time k, WBI i (k-1) represents the measured beam intensity of the i-th beam at time k-1, N represents the time interval between time t and time k, WBI i (k) With WBI i (k-1) is the measured beam intensity of the i-th beam at the two moments closest to the moment t.

43. The terminal device according to any one of claims 34 to 42, characterized in that: The service area is determined based on the priority of a candidate service area list, and the candidate service area list is determined based on one or more of the following: distribution of target terminal devices, where the target terminal devices are terminal devices that have a demand for the first MBS; service requirements of the first MBS; Geographical location information of the NTN cell; The impact of the geographical location of the NTN cell on signal propagation.

44. The terminal device according to claim 43, characterized in that: The priority of the candidate service area list is determined based on one or more of the following: The density of the target terminal devices; Network load; The coverage effect of the candidate service area.

45. The terminal device according to any one of claims 34 to 44, characterized in that: The first association relationship indicates that the session of the first MBS is associated with one or more geographical areas of the service area, and the transmission mode of the content data corresponding to the session of the first MBS is determined based on one or more of the following: A session identifier ID of the first MBS; The geographic area ID of the service area; One or more first beam IDs associated with the service area; Transmission time offset.

46. ​​The terminal device according to claim 45, characterized in that The transmission mode of the content data corresponding to the session of the first MBS includes one or more of the following: The content data corresponding to a session ID of the first MBS is transmitted in an area corresponding to the geographical area ID; The content data corresponding to a session ID of the first MBS is transmitted in an area corresponding to a portion of the geographical area IDs; The content data corresponding to a session ID of the first MBS is transmitted simultaneously in the areas corresponding to all the geographical area IDs; One of the geographic area IDs corresponds to one of the transmission time offsets, and content data corresponding to one of the session IDs of the first MBS is transmitted in all areas corresponding to the geographic area IDs based on the transmission time offset; One of the first beam IDs corresponds to one of the geographic area IDs, one of the first beam IDs corresponds to one of the transmission time offsets, and content data corresponding to one of the session IDs of the first MBS is transmitted on the first beams corresponding to one or more of the first beam IDs based on the transmission time offset.

47. The terminal device according to any one of claims 34 to 46, characterized in that: If the first association relationship is used to indicate an association relationship between the service area and the content of the first MBS, the first association relationship indicates one or more of the following: A geographical area ID of the service area is associated with a content ID of the first MBS; Associating a plurality of geographic area IDs of the service area with a content ID of the first MBS; A geographical area ID of the service area is associated with a plurality of content IDs of the first MBS.

48. The terminal device according to any one of claims 34 to 47, characterized in that: The first information is further used to indicate first indication information, and the first indication information is used to indicate an update of the service area information.

49. The terminal device according to claim 48, characterized in that The first indication information is determined based on one or more of the following: service requirements of the first MBS; The distribution of the target terminal devices.

50. The terminal device according to any one of claims 34 to 49, characterized in that: The first information is carried in a system information block SIB and / or an MBS broadcast configuration.

51. A network device, characterized in that: include: A sending unit, configured to send first information to a terminal device, wherein the first information is used to indicate one or more of the following: Service area information, where the service area information is used to indicate a service area of ​​a first multicast broadcast service MBS in a non-terrestrial network NTN cell; Channel configuration information, where the channel configuration information is used to indicate configuration information of a channel carrying the first MBS in the service area; A first association relationship is used to indicate an association relationship between the service area and the first MBS.

52. The network device according to claim 51, characterized in that The service area information includes geographical area information, and the geographical area information includes one or more of the following: Reference location; Area radius; Reference time; Information associated with a geographic area.

53. The network device according to claim 51 or 52, characterized in that: The service area is associated with one or more first beams, the first association relationship indicates an association relationship between the first beam and the first MBS, and the service area information includes one or more of the following: an identifier of the first beam; Physical layer information of the first beam.

54. The network device according to claim 53, characterized in that The first beam is determined based on one or more of the following: Antenna parameters; The service requirements of the terminal devices covered by the beam footprint; The geographic area of ​​the service area.

55. The network device according to any one of claims 51 to 54, characterized in that: The network device also includes: A determination unit is used to determine the third beam reselected by the terminal device based on the predicted beam strength and the first information, and the predicted beam strength is used to indicate the predicted beam strength at a future moment.

56. The network device according to claim 55, characterized in that The determining the third beam based on the predicted beam strength and the first information comprises: The predicted beam strength includes predicted beam strengths of multiple beams. The service area indicated by the first information is associated with one or more first beams. If the multiple beams include one or more first beams, the first beam with the largest predicted beam strength among the one or more first beams is the third beam.

57. The network device according to claim 55 or 56, characterized in that: The predicted beam strength is determined based on the measured beam strength measured by the terminal device.

58. The network device according to claim 57, characterized in that The predicted beam strength is determined based on the measured beam strength measured by the terminal device, including: The predicted beam strength includes predicted beam strengths of multiple beams. The predicted beam strength of the i-th beam at time t is calculated by formula PBI i (t) = WBI i (k)+N*[WB i (k)―WBI i (k―1)] determined; Among them, WBI i (k) represents the measured beam intensity of the i-th beam at time k, WBI i (k-1) represents the measured beam intensity of the i-th beam at time k-1, N represents the time interval between time t and time k, WBI i (k) With WBI i (k-1) is the measured beam intensity of the i-th beam at the two moments closest to the moment t.

59. The network device according to any one of claims 51 to 58, characterized in that: The service area is determined based on the priority of a candidate service area list, and the candidate service area list is determined based on one or more of the following: distribution of target terminal devices, where the target terminal devices are terminal devices that have a demand for the first MBS; service requirements of the first MBS; Geographical location information of the NTN cell; The impact of the geographical location of the NTN cell on signal propagation.

60. The network device according to claim 59, characterized in that The priority of the candidate service area list is determined based on one or more of the following: The density of the target terminal devices; Network load; The coverage effect of the candidate service area.

61. The network device according to any one of claims 51 to 60, characterized in that: The first association relationship indicates that the session of the first MBS is associated with one or more geographical areas of the service area, and the transmission mode of the content data corresponding to the session of the first MBS is determined based on one or more of the following: A session identifier ID of the first MBS; The geographic area ID of the service area; One or more first beam IDs associated with the service area; Transmission time offset.

62. The network device according to claim 61, characterized in that The transmission mode of the content data corresponding to the session of the first MBS includes one or more of the following: The content data corresponding to a session ID of the first MBS is transmitted in an area corresponding to the geographical area ID; The content data corresponding to a session ID of the first MBS is transmitted in an area corresponding to a portion of the geographical area IDs; The content data corresponding to a session ID of the first MBS is transmitted simultaneously in the areas corresponding to all the geographical area IDs; One of the geographic area IDs corresponds to one of the transmission time offsets, and content data corresponding to one of the session IDs of the first MBS is transmitted in all areas corresponding to the geographic area IDs based on the transmission time offset; One of the first beam IDs corresponds to one of the geographic area IDs, one of the first beam IDs corresponds to one of the transmission time offsets, and content data corresponding to one of the session IDs of the first MBS is transmitted on the first beams corresponding to one or more of the first beam IDs based on the transmission time offset.

63. The network device according to any one of claims 51 to 62, characterized in that: If the first association relationship is used to indicate an association relationship between the service area and the content of the first MBS, the first association relationship indicates one or more of the following: A geographical area ID of the service area is associated with a content ID of the first MBS; Associating a plurality of geographic area IDs of the service area with a content ID of the first MBS; A geographical area ID of the service area is associated with a plurality of content IDs of the first MBS.

64. The network device according to any one of claims 51 to 63, characterized in that: The first information is further used to indicate first indication information, and the first indication information is used to indicate an update of the service area information.

65. The network device according to claim 64, characterized in that The first indication information is determined based on one or more of the following: service requirements of the first MBS; The distribution of the target terminal devices.

66. The network device according to any one of claims 51 to 65, characterized in that: The first information is carried in a system information block SIB and / or an MBS broadcast configuration.

67. A terminal device, characterized in that: The terminal comprises 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 terminal executes the method as described in any one of claims 1 to 17.

68. A network device, characterized in that: It comprises 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 network device executes the method as described in any one of claims 18-33.

69. A device, characterized in that The device comprises a processor, configured to call a program from a memory so as to cause the device to execute a method as claimed in any one of claims 1 to 33.

70. A chip, characterized in that: It comprises a processor, which is used to call a program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 33.

71. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 33.

72. A computer program product, characterized in that The method comprises a program which causes a computer to execute the method according to any one of claims 1 to 33.

73. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 33.

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