A wireless communication method, device, communication device and storage medium

Abstract

Embodiments of the present application provide a wireless communication method, device, communication equipment and storage medium, and the method comprises: a terminal device receives indication information sent by a network device; the indication information is information related to an NTN gateway corresponding to a non-terrestrial network communication (NTN) cell; and the indication information is used for cell selection or cell reselection by the terminal device.

Description

Technical Field

[0001] This application relates to the field of mobile communication technology, specifically to a wireless communication method, apparatus, communication device, and storage medium. Background Technology

[0002] Non-terrestrial networks (NTNs) provide communication services to terrestrial users via satellite. Compared to terrestrial cellular communication, satellite communication has many unique advantages, such as: no geographical limitations on users, long communication distance, and high stability.

[0003] In an NTN, a satellite may connect to a satellite ground station via one or more inter-satellite links. If cell selection or reselection is performed based on the terminal's Reference Signal Receiving Power (RSRP) measurement, the communication between the terminal in the NTN cell accessing the satellite and the satellite ground station may not meet the terminal's service requirements. Summary of the Invention

[0004] This application provides a wireless communication method, apparatus, communication device, and storage medium.

[0005] The wireless communication method provided in this application includes:

[0006] The terminal device receives indication information sent by the network device; the indication information is information related to the NTN gateway corresponding to the NTN cell, and the indication information is used by the terminal device to perform cell selection or cell reselection.

[0007] The wireless communication method provided in this application includes:

[0008] The network device sends indication information to the terminal device; the indication information is information related to the NTN gateway corresponding to the NTN cell; the indication information is used by the terminal device to perform cell selection or cell reselection.

[0009] The wireless communication device provided in this application embodiment is applied to a terminal device and includes:

[0010] The receiving unit is configured to receive indication information sent by the network device; the indication information is information related to the NTN gateway corresponding to the NTN cell; the indication information is used by the terminal device to perform cell selection or cell reselection.

[0011] The wireless communication device provided in this application embodiment is applied to a network device and includes:

[0012] The sending unit is configured to send indication information to the terminal device; the indication information is information related to the NTN gateway corresponding to the NTN cell; the indication information is used by the terminal device to perform cell selection or cell reselection.

[0013] The communication device provided in this application embodiment can be a terminal device or a network device as described above. The communication device includes a processor and a memory. The memory stores computer programs, and the processor calls and runs the computer programs stored in the memory to execute the aforementioned wireless communication method.

[0014] The chip provided in this application embodiment is used to implement the above-described wireless communication method.

[0015] Specifically, the chip includes a processor for calling and running a computer program from a memory, causing a device equipped with the chip to perform the aforementioned wireless communication method.

[0016] The computer-readable storage medium provided in this application embodiment is used to store a computer program that causes a computer to execute the above-described wireless communication method.

[0017] The computer program product provided in this application includes computer program instructions that cause a computer to execute the above-described wireless communication method.

[0018] The computer program provided in this application embodiment, when run on a computer, causes the computer to execute the above-described wireless communication method.

[0019] Through the above technical solution, the network device sends indication information to the terminal device; the indication information is information related to the NTN gateway corresponding to the NTN cell; the indication information is used by the terminal device to perform cell selection or cell reselection, so that the terminal device can perform cell selection or cell reselection based on the indication information, thereby ensuring that the selected camp cell or the reselected target cell meets the terminal's service requirements. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a schematic diagram illustrating an application scenario of an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the architecture of another communication system provided in an embodiment of this application;

[0023] Figure 3This is a schematic diagram of the architecture of another communication system provided in an embodiment of this application;

[0024] Figure 4 This is a schematic diagram of an NTN scenario based on transparent relay satellites provided in an embodiment of this application;

[0025] Figure 5 This is a schematic diagram of an NTN scenario based on a regenerable relay satellite provided in an embodiment of this application;

[0026] Figure 6 This is an optional structural diagram of the NTN system provided in the embodiments of this application;

[0027] Figure 7 This is an optional structural diagram of the NTN system provided in the embodiments of this application;

[0028] Figure 8 This is an optional flowchart illustrating the wireless communication method provided in an embodiment of this application;

[0029] Figure 9 This is an optional flowchart illustrating the wireless communication method provided in an embodiment of this application;

[0030] Figure 10 This is an optional flowchart illustrating the wireless communication method provided in an embodiment of this application;

[0031] Figure 11 This is an optional structural schematic diagram of the wireless communication device provided in the embodiments of this application;

[0032] Figure 12 This is an optional structural schematic diagram of the wireless communication device provided in the embodiments of this application;

[0033] Figure 13 This is a schematic structural diagram of a communication device provided in an embodiment of this application;

[0034] Figure 14 This is a schematic structural diagram of the chip according to an embodiment of this application;

[0035] Figure 15 This is a schematic block diagram of a communication system provided in an embodiment of this application. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0037] Figure 1This is a schematic diagram of an application scenario according to an embodiment of this application.

[0038] like Figure 1 As shown, the communication system 100 may include a terminal device 110 and a network device 120. The network device 120 can communicate with the terminal device 110 via an air interface. Multi-service transmission is supported between the terminal device 110 and the network device 120.

[0039] It should be understood that the embodiments of this application are only illustrated by way of example with communication system 100, but the embodiments of this application are not limited thereto. That is to say, the technical solutions of the embodiments of this application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Internet of Things (IoT) system, Narrow Band Internet of Things (NB-IoT) system, enhanced Machine-Type Communications (eMTC) system, 5G communication system (also known as New Radio (NR) communication system), or future communication systems, etc.

[0040] exist Figure 1 In the communication system 100 shown, network device 120 may be an access network device that communicates with terminal device 110. The access network device can provide communication coverage for a specific geographical area and can communicate with terminal device 110 (e.g., UE) located within that coverage area.

[0041] Network device 120 may be an evolved Node B (eNB or eNodeB) in a Long Term Evolution (LTE) system, a Next Generation Radio Access Network (NG RAN) device, a base station (gNB) in an NR system, a radio controller in a Cloud Radio Access Network (CRAN), or a relay station, access point, vehicle-mounted device, wearable device, hub, switch, bridge, router, or network device in a future evolved Public Land Mobile Network (PLMN), etc.

[0042] Terminal device 110 can be any terminal device, including but not limited to terminal devices that are connected to network device 120 or other terminal devices via wired or wireless connections.

[0043] For example, the terminal device 110 may refer to an access terminal, user equipment (UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The access terminal may be a cellular phone, cordless phone, Session Initiation Protocol (SIP) phone, IoT device, satellite handheld terminal, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, in-vehicle device, wearable device, terminal device in a 5G network, or terminal device in a future evolved network, etc.

[0044] Terminal device 110 can be used for device-to-device (D2D) communication.

[0045] The wireless communication system 100 may further include a core network device 130 that communicates with the base station. This core network device 130 may be a 5G core network (5G Core, 5GC) device, such as an Access and Mobility Management Function (AMF), an Authentication Server Function (AUSF), a User Plane Function (UPF), or a Session Management Function (SMF). Optionally, the core network device 130 may also be an Evolved Packet Core (EPC) device for an LTE network, such as a Session Management Function + Core Packet Gateway (SMF+PGW-C) device. It should be understood that SMF+PGW-C can simultaneously implement the functions of both SMF and PGW-C. During network evolution, the aforementioned core network device may also be called by other names, or new network entities may be formed by dividing the core network functions; this embodiment does not limit this.

[0046] The various functional units in the communication system 100 can also establish connections and communicate with each other through the next generation (NG) interface.

[0047] For example, terminal devices establish an air interface connection with access network devices through the Uu interface for transmitting user plane data and control plane signaling; terminal devices can establish a control plane signaling connection with the AMF through NG interface 1 (N1); access network devices, such as next-generation radio access base stations (gNB), can establish a user plane data connection with the UPF through NG interface 3 (N3); access network devices can establish a control plane signaling connection with the AMF through NG interface 2 (N2); the UPF can establish a control plane signaling connection with the SMF through NG interface 4 (N4); the UPF can interact with the data network for user plane data through NG interface 6 (N6); the AMF can establish a control plane signaling connection with the SMF through NG interface 11 (N11); and the SMF can establish a control plane signaling connection with the PCF through NG interface 7 (N7).

[0048] Figure 1 An exemplary embodiment shows a base station, a core network device, and two terminal devices. Optionally, the wireless communication system 100 may include multiple base station devices, and each base station may include other numbers of terminal devices within its coverage area. This application embodiment does not limit this.

[0049] 3GPP is researching NTN technology, which typically uses satellite communication to provide communication services to terrestrial users. Compared to terrestrial cellular communication, satellite communication has many unique advantages. First, satellite communication is not limited by user location. For example, conventional terrestrial communication cannot cover oceans, mountains, deserts, or other areas where communication equipment cannot be deployed or where there is no communication coverage due to sparse population. However, with satellite communication, a single satellite can cover a large area, and since satellites orbit the Earth, theoretically every corner of the Earth can be covered by satellite communication. Second, satellite communication has significant social value. Satellite communication can provide coverage in remote mountainous areas and impoverished countries or regions at a relatively low cost, enabling people in these areas to enjoy advanced voice communication and mobile internet technologies, helping to narrow the digital divide with developed regions and promoting development in these areas. Third, satellite communication has a long range, and the cost does not increase significantly with increasing communication distance. Finally, satellite communication is highly stable and is not affected by natural disasters.

[0050] NTN technology can be combined with various communication systems. For example, NTN technology can be combined with NR systems to form an NR-NTN system. As another example, NTN technology can be combined with Internet of Things (IoT) systems to form an IoT-NTN system. As further examples, an IoT-NTN system can include NB-IoT-NTN systems and eMTC-NTN systems.

[0051] Figure 2 This is a schematic diagram of the architecture of another communication system provided in an embodiment of this application.

[0052] like Figure 2 As shown, the system includes terminal device 201 and satellite 202, which can communicate wirelessly. The network formed between terminal device 201 and satellite 202 can also be called an NTN. Figure 2 In the architecture of the communication system shown, satellite 202 can function as a base station, and terminal device 201 and satellite 202 can communicate directly. In this system architecture, satellite 202 can be referred to as a network device. In some embodiments of this application, the communication system may include multiple network devices 1102, and the coverage area of ​​each network device 1102 may include other numbers of terminal devices; this application does not limit this aspect.

[0053] Figure 3 This is a schematic diagram of the architecture of another communication system provided in an embodiment of this application.

[0054] like Figure 3 As shown, the system includes terminal device 201, satellite 202, and base station 203. Terminal device 201 and satellite 202 can communicate wirelessly, and satellite 202 can communicate with base station 203. The network formed by terminal device 201, satellite 202, and base station 203 can also be called an NTN. Figure 3 In the architecture of the communication system shown, satellite 202 may not function as a base station; communication between terminal device 201 and base station 203 requires relay through satellite 202. In this system architecture, base station 203 can be referred to as a network device. In some embodiments of this application, the communication system may include multiple base stations 203, and the coverage area of ​​each base station 203 may include other numbers of terminal devices; this application does not limit this. Base station 203 may be... Figure 1 Network device 120.

[0055] It should be understood that the aforementioned satellite 202 includes, but is not limited to:

[0056] Satellites are categorized into Low-Earth Orbit (LEO), Medium-Earth Orbit (MEO), Geostationary Earth Orbit (GEO), and Highly Elliptical Orbit (HEO) satellites. Satellites can employ multiple beams to cover the ground; for example, a single satellite can generate dozens or even hundreds of beams to cover the ground. In other words, a single satellite beam can cover a ground area with a diameter of tens to hundreds of kilometers, ensuring satellite coverage and increasing the overall system capacity of the satellite communication system.

[0057] As an example, LEO satellites can orbit at altitudes ranging from 500 km to 1500 km, with corresponding orbital periods of approximately 1.5 to 2 hours. The signal propagation delay for single-hop communication between users is generally less than 20 milliseconds, and the maximum visible time is 20 minutes. LEO satellites have short signal propagation distances and low link loss, thus requiring less power from user terminals. GEO satellites, on the other hand, can orbit at an altitude of 35,786 km, with an orbital period of 24 hours. The signal propagation delay for single-hop communication between users is generally 250 milliseconds.

[0058] To ensure satellite coverage and improve the overall capacity of the satellite communication system, satellites use multi-beam coverage to cover the ground. A single satellite can generate dozens or even hundreds of beams to cover the ground; a single satellite beam can cover a ground area with a diameter of tens to hundreds of kilometers.

[0059] It should be noted that, Figures 1 to 3This application merely illustrates the system to which this application applies; of course, the methods shown in the embodiments of this application can also be applied to other systems. Furthermore, the terms "system" and "network" are often used interchangeably herein. The term "and / or" in this application merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "or" relationship. It should also be understood that "instruction" mentioned in the embodiments of this application can be a direct instruction, an indirect instruction, or an indication of a related relationship. For example, A instructing B can mean that A directly instructs B, for example, B can be obtained through A; it can also mean that A indirectly instructs B, for example, A instructs C, B can be obtained through C; or it can mean that there is a related relationship between A and B. It should also be understood that "correspondence" mentioned in the embodiments of this application can indicate a direct or indirect correspondence between two things, or an related relationship between two things, or a relationship of instruction and being instructed, configuration and being configured, etc. It should also be understood that the "predefined" or "predefined rules" mentioned in the embodiments of this application can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices), and this application does not limit the specific implementation method. For example, predefined can refer to those defined in a protocol. It should also be understood that in the embodiments of this application, the "protocol" can refer to standard protocols in the field of communication, such as the LTE protocol, the NR protocol, and related protocols applied to future communication systems, and this application does not limit this.

[0060] Satellites can be categorized into two types based on their functionality: transparent payload and regenerative payload. Transparent payload satellites only provide radio frequency filtering, frequency conversion, and amplification, offering transparent signal forwarding without altering the transmitted waveform. Regenerative payload satellites, in addition to radio frequency filtering, frequency conversion, and amplification, can also provide demodulation / decoding, routing / conversion, and encoding / modulation functions, possessing some or all of the functions of a base station.

[0061] In an NTN, there may be one or more gateways for communication between the satellite and the ground, or for communication between the gNB on the satellite and the core network, or for communication between the gNB distribution unit (DU) on the satellite and the gNB base station central unit (CU) on the ground.

[0062] Figure 4 and Figure 5Schematic diagrams of NTN scenarios based on transparent relay satellites and regenerative relay satellites are shown respectively.

[0063] like Figure 4 As shown, in an NTN scenario based on transparent relay satellites, gateway 401 and satellite 402 communicate via a feeder link, while satellite 402 and terminal 403 communicate via a service link. Gateway 401 is connected to data network 404. Figure 5 As shown, in the NTN scenario based on regenerable relay satellites, satellite 402 and satellite 405 communicate with each other via an inter-satellite link, gateway 401 communicates with satellite 402 or satellite 405 via a feeder link, and satellite 402 and terminal 403 communicate via a service link.

[0064] To facilitate understanding of the technical solutions of the embodiments of this application, the relevant technologies of the embodiments of this application are described below. The following relevant technologies are optional solutions and can be combined with the technical solutions of the embodiments of this application in any way, and they all fall within the protection scope of the embodiments of this application.

[0065] Satellite network architecture

[0066] Currently, 3GPP considers two types of satellites: transparent payload satellites and regenerative payload satellites. Transparent payload satellites only perform frequency conversion and amplification of the signal; the satellite is transparent to the signal. Regenerative payload satellites possess some or all of the functions of a base station, performing frequency conversion and amplification, as well as demodulation and decoding, conversion and / or routing, encoding and modulation, and other functions.

[0067] Transparent forwarding satellite network architecture, such as Figure 6 As shown, terminal device 610 accesses 5G CN650 through NG RAN61 and connects to data network 660 through 5G CN650.

[0068] NG-RAN61 includes a Remote Radio Unit (RRU) 62 and a Next Generation Node B (gNB) 640. The Remote Radio Unit 62 includes a satellite 620 and an NTN gateway 630.

[0069] Regenerable relay satellite network architecture such as Figure 7As shown, NG RAN61 includes a remote radio unit 62, which includes a satellite 620 and an NTN gateway 630. The power supply link between the satellite 620 and the NTN gateway 630 is based on the Satellite Radio Interface (SRI). The satellite 620 has some or all of the functions of a base station.

[0070] exist Figure 6 and Figure 7 In the network architecture shown, the NTN gateway 630 is usually located on the ground and can also be called a ground gateway.

[0071] Community Selection

[0072] When a UE powers on or enters a coverage area from a dead zone, it searches for all frequency points allowed by the PLMN and selects a suitable cell to camp on. This process is called cell selection. Cell selection types include initial cell selection and cell selection based on stored information. Regardless of the type, the cell to be selected needs to be measured for channel quality assessment to determine if it meets the camping conditions. The cell selection criterion in cellular networks is called the S-criterion; camping is permitted when the S-criterion is met.

[0073] Cell selection based on stored information: The UE has stored carrier frequency information, and may also include some cell parameter information, such as information obtained from previously received measurement and control information or previously camped or detected cells. The UE will prioritize cells with relevant information, and once a suitable cell appears, the UE will select that cell and camp on it. If none of the cells with stored information are suitable, the UE will initiate the initial cell selection.

[0074] S-criterion:

[0075] Srxlev > 0 and Squal > 0

[0076] Srxlev=Q rxlevmeas -(Q rxlevmin +Q rxlevminoffset )-P compensation -Qoffset temp

[0077] Squal = Q qualmeas -(Q qualmin +Q qualminoffset -Qoffset temp

[0078] The meanings of each parameter in the S criterion are shown in Table 1.

[0079] Table 1. Meaning of each parameter in the S-criterion

[0080]

[0081] Community re-election

[0082] Cell reselection refers to the process by which a UE, in idle mode, monitors the signal quality of neighboring cells and the current cell to select the best cell to provide service signal. Cell reselection can be divided into intra-frequency cell reselection and inter-frequency cell reselection. Intra-frequency cell reselection can solve radio coverage problems. Inter-frequency cell reselection not only solves radio coverage problems but can also achieve load balancing by setting the priority of different frequency points.

[0083] During cell reselection, in idle or inactive mode, the UE selects a better cell and camps there by detecting the signal quality of neighboring cells and the current cell, combined with broadcast messages. After successfully camping on the current cell through the cell selection process, the UE will continuously perform cell measurements on the current cell and decide whether to initiate neighbor cell measurements. During neighbor cell measurements, when the signal quality and level of a neighboring cell meet the S criterion and a certain reselection decision criterion (R criterion), the UE will abandon the current cell and camp on that neighboring cell.

[0084] The UE's Radio Resource Control (RRC) layer calculates Srxlev / Squal (S criterion) based on the RSRP / RSRQ measurement results and compares it with the co-frequency measurement to trigger the RSRP threshold (S). IntraSearchP ) / Same-frequency measurement start RSRQ threshold (S IntraSearchQ ) and inter-frequency or inter-system measurement start RSRP threshold (S nonIntraSearchP ) / Different frequency or different system measurement start RSRQ threshold (S nonIntraSearchQ The comparison is used as a criterion for deciding whether to initiate neighbor cell measurements. The decision process for deciding whether to initiate same-frequency or different-frequency measurements is shown in Table 2.

[0085] Table 2. Example of the decision-making process for whether to initiate same-frequency or different-frequency measurement.

[0086]

[0087] If the neighboring cell measurement is a co-frequency measurement, then the UE compares Srxlev and S IntraSearchP , and Squal and S IntraSearchQ Among them, S IntraSearchQ and S IntraSearchP This is the threshold for starting the same-frequency measurement.

[0088] If the neighbor cell measurement is an inter-frequency or inter-system measurement, then the UE compares Srxlev and S nonIntraSearchP , and Squal and S nonIntraSearchQAmong them, S nonIntraSearchQ and S nonIntraSearchP This is the threshold for starting measurements at different frequencies or in different systems.

[0089] After the UE meets the measurement conditions, the UE performs same-frequency or different-frequency measurements on the neighboring cells of the current cell and obtains a set of candidate cells based on the measurement results. After obtaining the set of candidate cells, the UE executes the reselection conditions according to the different reselection target frequencies shown in Table 3, sorts the set of candidate cells according to certain criteria (as shown in Table 3), selects a suitable cell based on the sorting, and camps on it.

[0090] Table 3. Examples of target reselection frequency and reselection conditions

[0091]

[0092] During cell reselection, if multiple cells with different priorities simultaneously meet the cell reselection criteria, the higher priority frequency or RAT takes precedence over the lower priority frequency or RAT. For frequencies of the same frequency or equal priority, the current cell and neighboring cells are ranked according to the R criterion.

[0093] R-criterion:

[0094] Current serving cell: Rs = Qmeas, s + Qhyst - Qoffset temp

[0095] Neighboring area: Rn=Qmeas, n-Qoffset-Qoffset temp

[0096] The meanings of the parameters in the formula for the R criterion are shown in Table 4.

[0097] Table 4. Meaning of each parameter in the formula for the R criterion

[0098]

[0099] If the neighboring cell's Rn exceeds the current serving cell's Rs, the neighboring cell is considered a candidate cell. After the UE sorts the current cell and neighboring cells according to the R criterion to obtain a candidate cell set, it further selects the stationary cell through the optimal cell range (rangeToBestCell). That is, among all candidate cells whose R value differs from that of the cell with the best signal quality within the rangeToBestCell range, the cell with the most beams that meet the threshold absThreshSS-BlocksConsolidation is selected as the target cell. Here, absThreshSS-BlocksConsolidation is configured with a threshold for merging L1 measurements for each reference signal index.

[0100] In satellite networks, for satellites supporting regenerative forwarding architectures with Inter-Satellite Link (ISL), the introduction of ISLs means that the satellite (gNB-DU or gNB) may connect to a distant ground station via one or more hops. This results in significant latency between the UE accessing the satellite's NTN cell and the data network, making it unsuitable for some UEs with latency-critical services. Furthermore, when a UE performs cell selection reselection, if it lacks information about the satellite's (gNB-DU or gNB) ground station location and backhaul link latency, and relies solely on RSRP / RSRQ or distance-latency related information with the satellite to select access, the chosen cell may not be optimal.

[0101] To facilitate understanding of the technical solutions of the embodiments of this application, the technical solutions of this application are described in detail below through specific embodiments. The above-mentioned related technologies are optional solutions and can be arbitrarily combined with the technical solutions of the embodiments of this application, all of which fall within the protection scope of the embodiments of this application. The embodiments of this application include at least some of the following contents.

[0102] The wireless communication method provided in the embodiments of this application, such as Figure 8 As shown, it is applied to terminal devices and includes:

[0103] S801. The terminal device receives indication information sent by the network device; the indication information is information related to the NTN gateway corresponding to the NTN cell; the indication information is used by the terminal device to perform cell selection or cell reselection.

[0104] The terminal device can receive one or more indication messages sent by the network device. One indication message corresponds to one NTN cell, and the indication message corresponding to one NTN cell is related to the NTN gateway connected to the satellite covering that NTN cell. In one example, for NTN cell 1 and NTN cell 2, the satellite covering NTN cell 1 is satellite 1, the satellite covering NTN cell 2 is satellite 2, the NTN gateway connected to satellite 1 is NTN gateway 1, and the NTN gateway connected to satellite 2 is NTN gateway 2. Therefore, the indication message corresponding to NTN cell 1 is related to NTN gateway 1, and the indication message corresponding to NTN cell 2 is related to NTN gateway 2.

[0105] Optionally, the indication information indicates the latency between the terminal device and the NTN gateway corresponding to the NTN cell when the terminal device accesses the NTN cell.

[0106] In one example, NTN cell 1 corresponds to NTN gateway 1, and NTN cell 2 corresponds to NTN gateway 2. The indication information corresponding to NTN cell 1 indicates the time delay between the terminal device and NTN gateway 1 when the terminal device accesses NTN cell 1, and the indication information corresponding to NTN cell 1 indicates the time delay between the terminal device and NTN gateway 2 when the terminal device accesses NTN cell 2.

[0107] Optionally, the terminal device is in an idle or inactive state.

[0108] After receiving the instruction information, the terminal device shall at least perform cell selection or cell reselection according to the received instruction information.

[0109] When the terminal device is not connected to the network, the terminal device selects a cell based on the indication information of each NTN cell in one or more unconnected NTN cells to determine the cell to camp on.

[0110] When a terminal device accesses the network, it performs cell reselection based on the indication information corresponding to the currently accessed NTN cell and the indication information corresponding to the neighboring cells of the current NTN cell to determine the target cell.

[0111] In this embodiment of the application, the network device can send indication information of each NTN cell in a plurality of NTN cells to the terminal device. The terminal device selects candidate NTN cells from the NTN cells corresponding to the indication information sent by the network device, and performs cell selection or cell reselection based on the indication information corresponding to the candidate NTN cells.

[0112] In one example, the network device sends the following indication information for NTN cells to the terminal device: NTN cell 1, NTN cell 2, and NTN cell 3. If the terminal device finds NTN cell 1 and NTN cell 2 without accessing the network, the terminal device will use NTN cell 1 and NTN cell 2 as candidate NTN cells and select the cell based on the indication information for NTN cell 1 and NTN cell 2.

[0113] In one example, the network device sends the following indication information corresponding to NTN cells to the terminal device: NTN cell 1, NTN cell 2, and NTN cell 3. When the terminal device accesses the network, the current serving cell is NTN cell 1, and NTN cell 3 is a neighboring cell of NTN cell 1. Then, the terminal device will use NTN cell 1 and NTN cell 3 as candidate NTN cells and perform cell reselection based on the indication information corresponding to NTN cell 1 and NTN cell 3.

[0114] Optionally, the network device broadcasts indication information for different NTN cells. When the terminal device performs cell selection or cell reselection, it receives the indication information corresponding to the candidate NTN cells and performs cell selection or cell reselection based on the indication information corresponding to the candidate NTN cells.

[0115] The wireless communication method provided in the embodiments of this application, such as Figure 9 As shown, it is applied to network devices, including:

[0116] S901. The network device sends indication information to the terminal device. The indication information is information related to the NTN gateway corresponding to the NTN cell. The indication information is used by the terminal device to perform cell selection or cell reselection.

[0117] Network devices send one or more indication messages to terminal devices within their coverage area. Each indication message corresponds to an NTN cell, and the indication message for each NTN cell contains information related to the NTN gateway connected to the satellite covering that NTN cell. In one example, for NTN cell 1 and NTN cell 2, the satellite covering NTN cell 1 is satellite 1, and the satellite covering NTN cell 2 is satellite 2. The NTN gateway connected to satellite 1 is NTN gateway 1, and the NTN gateway connected to satellite 2 is NTN gateway 2. Therefore, the indication message for NTN cell 1 contains information related to NTN gateway 1, and the indication message for NTN cell 2 contains information related to NTN gateway 2.

[0118] Optionally, the indication information indicates the latency between the terminal device and the NTN gateway corresponding to the NTN cell when the terminal device accesses the NTN cell.

[0119] In one example, NTN cell 1 corresponds to NTN gateway 1, and NTN cell 2 corresponds to NTN gateway 2. The indication information corresponding to NTN cell 1 indicates the time delay between the terminal device and NTN gateway 1 when the terminal device accesses NTN cell 1, and the indication information corresponding to NTN cell 1 indicates the time delay between the terminal device and NTN gateway 2 when the terminal device accesses NTN cell 2.

[0120] When a terminal device is not connected to the network, the network device sends indication information to the terminal device for cell selection. The NTN cell corresponding to the indication information for cell selection by the terminal device is either the NTN cell indicated by the information stored in the terminal device or the NTN cell found by the terminal device during cell search. The stored information may include carrier frequency, cell identifier, and other information that can identify an NTN cell.

[0121] When a terminal device accesses the network, the network device sends an indication message to the terminal device for cell reselection. The NTN cell corresponding to the indication message for cell reselection by the terminal device includes the currently serving cell, i.e., the currently accessed NTN cell, and the neighboring cells of the serving cell.

[0122] After receiving the instruction information, the terminal device shall at least perform cell selection or cell reselection according to the received instruction information.

[0123] The wireless communication method provided in the embodiments of this application, such as Figure 10 As shown, a wireless communication system applied to terminal devices and network devices includes:

[0124] S1001. The network device sends instruction information to the terminal device;

[0125] S1002. The terminal device performs cell selection or cell reselection based on the indication information.

[0126] Here, the execution of the terminal device can be referred to Figure 8 The description of the terminal device in the wireless communication method shown, and the execution of the network device can be referred to Figure 9 The description of the network devices in the wireless communication method shown will not be repeated here.

[0127] In this embodiment of the application, the network device sends indication information to the terminal device. The indication information is related to the NTN gateway corresponding to the NTN cell of the non-terrestrial network communication. The indication information is used by the terminal device to select or reselect a cell, so that the terminal device can select or reselect a cell based on the indication information, thereby making the selected camping cell or the target cell for reselection meet the service requirements of the terminal device.

[0128] In some embodiments, the indication information includes at least one of the following:

[0129] Information A: Location information of the NTN gateway;

[0130] Information B: Hop count of the inter-satellite link between the satellites covering the NTN cell and the NTN gateway;

[0131] Information C: Delay information between the satellites covering the NTN cell and the NTN gateway;

[0132] Information D: The latency level between the satellites covering the NTN cell and the NTN gateway;

[0133] Information E: The distance between the satellite covering the NTN cell and the NTN gateway.

[0134] In one example, the information includes the location of the NTN gateway.

[0135] In one example, the indication information includes: the number of hops of the inter-satellite link between the satellite covering the NTN cell and the NTN gateway.

[0136] In one example, the indication information includes: the location of the NTN gateway and the latency information from the satellite covering the NTN cell to the NTN gateway.

[0137] In one example, the indication information includes the number of hops of the inter-satellite link between the satellite covering the NTN cell and the NTN gateway, and the distance between the satellite covering the NTN cell and the NTN gateway.

[0138] The location information of the NTN gateway can be a geographical location represented by latitude and longitude, or a regional identifier that identifies a geographical area. Optionally, the granularity of the location information of the NTN gateway can be larger than a granularity threshold, which can be 2 kilometers (km).

[0139] For one or more of the following: hop count, latency information, latency level, and distance of the inter-satellite link between the satellite covering the NTN cell and the NTN gateway, it is possible to reflect the latency between the satellite covering the NTN cell and the NTN gateway.

[0140] In this embodiment of the application, when the hop count of the inter-satellite link corresponding to an NTN cell is 0, the satellite covering the NTN cell is directly connected to the ground gateway.

[0141] Latency levels can be quantified as latency information. Different latency levels correspond to different latency ranges.

[0142] In some embodiments, when the terminal device is not connected to an NTN cell, the terminal device performs cell selection based on indication information corresponding to at least one first NTN cell to determine the cell to camp on, wherein the first NTN cell is an NTN cell that the terminal device is not connected to.

[0143] At this time, the selected cell is determined based on the indication information corresponding to at least one first NTN cell, where the first NTN cell is an NTN cell that the terminal device has not accessed.

[0144] Here, in the cell selection scenario, the NTN cell for which cell selection is performed is referred to as the first NTN cell. The first NTN cell is the NTN cell to be selected when the terminal device initially accesses the network.

[0145] Optionally, the first NTN cell is the NTN cell indicated by the information stored in the terminal device, and the stored information may include information such as carrier frequency and cell identifier.

[0146] Optionally, the first NTN cell is the NTN cell found in the cell search.

[0147] When the terminal device stores information indicating a first NTN cell or searches for a first NTN cell, the terminal device determines whether the current first NTN cell is a camping cell. If so, it accesses the current first NTN cell.

[0148] When the terminal device stores information indicating multiple first NTN cells or finds multiple first NTN cells, the terminal device selects a camping cell from among the multiple first NTN cells and accesses the selected camping cell.

[0149] In some embodiments, the criteria for cell selection by the terminal device include:

[0150] The first criterion is a criterion for cell selection based on signal quality;

[0151] The second criterion is a criterion for cell selection based on the indication information;

[0152] The first criterion has a higher priority than the second criterion.

[0153] In some embodiments, the criteria for cell selection include the following criteria:

[0154] The first criterion is a criterion for cell selection based on signal quality;

[0155] The second criterion is a criterion for cell selection based on the indication information; the first criterion has a higher priority than the second criterion.

[0156] Optionally, the first criterion is a cell selection criterion based on RSRP and / or RSRQ.

[0157] In one example, the first criterion is the S criterion.

[0158] In this embodiment of the application, when the terminal device determines that a first NTN cell meets both the first criterion and the second criterion, the first NTN cell is designated as the stationary cell.

[0159] Taking a candidate cell including a first NTN cell as an example, the terminal device determines whether the first NTN cell meets the first criterion and the second criterion. If it meets the first criterion and the second criterion, the NTN cell is selected as the stationary cell.

[0160] Taking a candidate cell that includes multiple first NTN cells as an example, the terminal device determines the first candidate NTN cell among the multiple first NTN cells. The first candidate NTN cell is the first NTN cell that meets the first criterion. The terminal device also determines whether the first candidate NTN cell meets the second criterion and determines the first candidate NTN cell that meets the second criterion as the stationary cell.

[0161] In this embodiment, the terminal device determines whether an NTN cell meets a first criterion. If the first NTN cell meets the first criterion, it is identified as a first candidate NTN cell. Then, it determines whether the first NTN cell meets a second criterion. If it does, the first NTN cell is designated as a camping cell. Alternatively, the terminal device determines at least one first candidate NTN cell that meets the first criterion from a plurality of first NTN cells, and determines a camping cell that meets the second criterion from at least one first candidate NTN cell.

[0162] In one example, if the terminal device is not connected to an NTN cell, it determines whether NTN cell 1 meets the first criterion. If it meets the first criterion, it continues to determine whether NTN cell 1 meets the second criterion. If NTN cell 1 meets the second criterion, it determines that NTN cell 1 is a camping cell and the terminal device connects to NTN cell 1. Otherwise, it continues to determine whether other NTN cells can be used as camping cells.

[0163] In one example, when the terminal device is not connected to an NTN cell, it determines whether NTN cell 1, NTN cell 2, and NTN cell 3 meet the first criterion. If NTN cell 1 and NTN cell 2 meet the first criterion, they are selected as first candidate NTN cells. The terminal device then determines whether NTN cell 1 and NTN cell 2 meet the second criterion. If NTN cell 1 meets the second criterion, it is determined to be the stationary cell and the terminal device connects to NTN cell 1. If NTN cell 2 meets the second criterion, it is determined to be the stationary cell and the terminal device connects to NTN cell 2.

[0164] In some embodiments, the second criterion includes at least one of the following conditions:

[0165] Condition 1A: The first distance corresponding to the stationed cell is less than the first distance threshold. The first distance corresponding to the stationed cell is determined based on the location information of the NTN gateway corresponding to the stationed cell. The first distance corresponding to the stationed cell is the distance between the satellite covering the stationed cell and the NTN gateway.

[0166] Condition 1B: The number of hops of the inter-satellite link corresponding to the stationed cell is less than the first hop count threshold;

[0167] Condition 1C: The latency information corresponding to the stationed cell is less than the first latency threshold;

[0168] Condition 1D: The latency corresponding to the latency level of the stationed cell is less than the latency corresponding to the set first latency level;

[0169] Condition 1E: The distance to the residential cell is less than the second distance threshold.

[0170] When the indication information includes information A, the second criterion may include condition 1A; when the indication information includes information B, the second criterion may include condition 1B; when the indication information includes information C, the second criterion may include condition 1C; when the indication information includes information D, the second criterion may include condition 1D; when the indication information includes information E, the second criterion may include condition 1E.

[0171] The second criterion may include one or more of conditions 1A, 1B, 1C, 1D, and 1E.

[0172] In one example, the second criterion includes condition 1A: for a first candidate NTN cell, the terminal device determines a first distance between the NTN gateway and the terminal device based on the location of the NTN gateway and the location of the terminal device. If the first distance is less than a first distance threshold, the first candidate NTN cell is determined to satisfy the second criterion. In this case, the first candidate NTN cell is a camped cell.

[0173] In one example, the second criterion includes conditions 1A and 1D. For a first candidate NTN cell, the terminal device determines the first distance between the NTN gateway and the terminal device based on the location of the NTN gateway and the location of the terminal device. If the first distance is less than the first distance threshold and the latency corresponding to the latency level of the first candidate NTN cell is less than the latency corresponding to the first latency level, then the first candidate NTN cell is determined to meet the second criterion. In this case, the first candidate NTN cell is a camped cell.

[0174] In some embodiments, the second criterion includes at least one of the following conditions:

[0175] Condition 2A: The stationed cell is the first candidate NTN cell with the smallest corresponding first distance among at least two first candidate NTN cells, and the first candidate NTN cell is the first NTN cell that satisfies the first criterion; the first distance is determined based on the location information of the NTN gateway, and the first distance is the distance between the satellite covering the first candidate NTN cell and the NTN gateway;

[0176] Condition 2B: The stationed cell is the first candidate NTN cell with the smallest hop count of the corresponding inter-satellite link among the at least two first candidate NTN cells;

[0177] Condition 2C: The stationed cell is the first candidate NTN cell with the smallest corresponding latency information among the at least two first candidate NTN cells;

[0178] Condition 2D: The stationed cell is the first candidate NTN cell with the smallest latency corresponding to the corresponding latency level among the at least two first candidate NTN cells;

[0179] Condition 2E: The stationed cell is the first candidate NTN cell with the smallest corresponding distance among the at least two first candidate NTN cells.

[0180] When the instruction information includes information A, the second criterion may include condition 2A; when the instruction information includes information B, the second criterion may include condition 2B; when the instruction information includes information C, the second criterion may include condition 2C; when the instruction information includes information D, the second criterion may include condition 2D; when the instruction information includes information E, the second criterion may include condition 2E.

[0181] The second criterion may include one or more of conditions 2A, 2B, 2C, 2D, and 2E.

[0182] In one example, the second criterion includes condition 2B: for a first candidate NTN cell, if the terminal device determines that the number of hops of the inter-satellite link corresponding to the first candidate NTN cell is less than the number of hops of the inter-satellite link corresponding to other first candidate NTN cells, that is, the number of hops corresponding to the first candidate NTN cell is the smallest among all the number of hops corresponding to the first candidate NTN cells, then the first candidate NTN cell is determined to satisfy the second criterion. At this time, the first candidate NTN cell can be a camping cell.

[0183] In one example, the second criterion includes conditions 2B and 2C. The terminal device determines the first distance of each first candidate NTN cell based on the location of the NTN gateway corresponding to the multiple first candidate NTN cells and the location of the terminal device, and determines the latency information corresponding to each first candidate NTN cell. When the first distance corresponding to a first candidate NTN cell is the smallest and the latency represented by the corresponding latency information is the smallest, the first candidate NTN cell is determined to satisfy the second criterion. At this time, the first candidate NTN cell is a camped cell.

[0184] In practical applications, the second criterion for a terminal device to determine the cell to be camped may include one or more of the following conditions: condition 1A, condition 1B, condition 1C, condition 1D, condition 1E, condition 2A, condition 2B, condition 2C, condition 2D, and condition 2E.

[0185] In some embodiments, when the terminal device accesses the second NTN cell, the terminal device performs cell reselection based on the indication information corresponding to the second NTN cell and the indication information corresponding to the third NTN cell to determine the target cell. The second NTN cell is the NTN cell currently accessed by the terminal device, and the third NTN cell is a neighboring cell of the second NTN cell.

[0186] At this time, the target cell for cell reselection is determined based on the indication information corresponding to the second NTN cell and the indication information corresponding to the third NTN cell. The second NTN cell is the NTN cell currently accessed by the terminal device, and the third NTN cell is a neighboring cell of the second NTN cell.

[0187] When a terminal device accesses an NTN cell, the NTN cell currently accessed by the terminal device is referred to as the second NTN cell, and the neighboring cells of the second NTN cell are referred to as the third NTN cell. The terminal device performs cell reselection among the second NTN cell and at least one third NTN cell, and takes the reselected cell as the target cell.

[0188] If the target cell is the second NTN cell, the terminal device will not perform an NTN cell handover and will continue to camp on the current second NTN cell. If the target cell is not the second NTN cell, the terminal device will perform a cell handover, switching from the current second NTN cell to the target cell.

[0189] Optionally, the second NTN cell and the third NTN cell are different-frequency cells with the same frequency or the same priority.

[0190] In some embodiments, the criteria for cell reselection include:

[0191] The third criterion is a criterion for cell reselection based on signal quality;

[0192] The fourth criterion is a criterion for cell reselection based on the indication information;

[0193] The third criterion has a higher priority than the fourth criterion.

[0194] Optionally, the third criterion is a criterion for cell reselection based on RSRP and / or RSRQ.

[0195] In one example, the third criterion is the R criterion.

[0196] In this embodiment of the application, the criteria for cell reselection by the terminal device, i.e. the criteria for determining the target cell, may include only the third and fourth criteria, or may include criteria other than the third and fourth criteria, such as the fifth criterion, wherein the fifth criterion is a beam-based criterion.

[0197] If the criteria for cell reselection by the terminal device only include the third and fourth criteria, the terminal device will identify the NTN cell that meets the third and fourth criteria as the target cell.

[0198] Taking a terminal device's cell reselection criteria, which only include the third and fourth criteria, as an example, for multiple NTN cells, the terminal device determines the NTN cell that meets the third criterion (i.e., the second candidate NTN cell), and then determines the second candidate NTN cell that meets the fourth criterion (the target cell) from among the second candidate NTN cells. Here, the second candidate NTN cell is the NTN cell that meets the third criterion, and the second candidate NTN cell that meets the fourth criterion is the target cell.

[0199] In one example, when a terminal device accesses NTN cell 1, for the neighboring cell of NTN cell 1, NTN cell 2, it determines whether NTN cell 2 meets the third criterion. If it meets the third criterion, it continues to determine whether NTN cell 2 meets the fourth criterion. If NTN cell 2 meets the fourth criterion, it determines NTN cell 2 as the target cell and the terminal device switches from NTN cell 1 to NTN cell 2. Otherwise, it continues to camp on NTN cell 1.

[0200] In one example, when a terminal device accesses NTN cell 1, it determines whether NTN cell 1 and its neighboring cells, NTN cell 2 and NTN cell 3, meet the third criterion. If NTN cell 1 and NTN cell 2 meet the third criterion, they are selected as second candidate NTN cells. The terminal device then determines whether NTN cell 1 and NTN cell 3 meet the fourth criterion. If NTN cell 1 meets the fourth criterion, it is determined to be the target cell, and the terminal device continues to camp on NTN cell 1. If NTN cell 1 does not meet the fourth criterion, but NTN cell 2 does, it is determined to be the target cell, and the terminal device switches from NTN cell 1 to NTN cell 2.

[0201] When the criteria for cell reselection by the terminal device include the third, fourth and fifth criteria, the terminal device will identify the NTN cell that meets the third, fourth and fifth criteria as the target cell.

[0202] In one example, for multiple NTN cells, the terminal device determines the candidate NTN cell that meets the third criterion among the multiple candidate NTN cells, namely the second candidate NTN cell, and determines the second candidate NTN cell that meets the fourth criterion among the second candidate NTN cells, and determines the second candidate NTN cell that meets the fifth criterion among the second candidate NTN cells that meets the fourth criterion as the target cell.

[0203] In one example, the terminal device determines the candidate NTN cell that meets the third and fifth criteria among multiple candidate NTN cells, namely the second candidate NTN cell, and determines the second candidate NTN cell that meets the fourth criterion as the target cell.

[0204] In some embodiments, the fourth criterion includes at least one of the following conditions:

[0205] Condition 3A: The second distance corresponding to the target cell is less than the third distance threshold. The second distance corresponding to the target cell is determined based on the location information of the NTN gateway corresponding to the target cell. The second distance corresponding to the target cell is the distance between the satellite covering the target cell and the NTN gateway.

[0206] Condition 3B: The number of hops of the inter-satellite link corresponding to the target cell is less than the second hop count threshold;

[0207] Condition 3C: The latency information corresponding to the target cell is less than the second latency threshold;

[0208] Condition 3D: The latency corresponding to the latency level of the target cell is less than the latency corresponding to the set second latency level;

[0209] Condition 3E: The distance to the target cell is less than the fourth distance threshold.

[0210] If the instruction information includes information A, the fourth criterion may include condition 3A; if the instruction information includes information B, the fourth criterion may include condition 13B; if the instruction information includes information C, the fourth criterion may include condition 3C; if the instruction information includes information D, the fourth criterion may include condition 3D; if the instruction information includes information E, the fourth criterion may include condition 3E.

[0211] The fourth criterion may include one or more of conditions 3A, 3B, 3C, 3D, and 3E.

[0212] In one example, the fourth criterion includes condition 3A, whereby for a second candidate NTN cell, the terminal device determines a second distance between the NTN gateway and the terminal device based on the location of the NTN gateway and the location of the terminal device, and if the first distance is less than a third distance threshold, the second candidate NTN cell is determined to satisfy the fourth criterion.

[0213] In one example, the fourth criterion includes conditions 3A and 3D. For a second candidate NTN cell, the terminal device determines the second distance between the NTN gateway and the terminal device based on the location of the NTN gateway and the location of the terminal device. If the second distance is less than the third distance threshold and the latency corresponding to the latency level of the second candidate NTN cell is less than the latency corresponding to the second latency level, then the second candidate NTN cell is determined to satisfy the fourth criterion.

[0214] In this embodiment, the first distance threshold and the second distance threshold may be the same or different. This embodiment does not impose any limitations on the magnitude of the first distance threshold and the second distance threshold.

[0215] In this embodiment, the first delay threshold and the second delay threshold may be the same or different. This embodiment does not impose any limitation on the magnitude of the first delay threshold and the second delay threshold.

[0216] In some embodiments, the fourth criterion includes at least one of the following conditions:

[0217] Condition 4A: The target cell is the second candidate NTN cell with the smallest corresponding second distance among at least two second candidate NTN cells. The second candidate NTN cell is either a second NTN cell or a third NTN cell that at least satisfies the third criterion. The second distance is determined based on the location information of the NTN gateway. The second distance is the distance between the satellite covering the second candidate NTN cell and the NTN gateway.

[0218] Condition 4B: The target cell is the second candidate NTN cell with the smallest hop count of the corresponding inter-satellite link among the at least two second candidate NTN cells;

[0219] Condition 4C: The target cell is the second candidate NTN cell with the smallest corresponding latency information among the at least two second candidate NTN cells;

[0220] Condition 4D: The target cell is the second candidate NTN cell with the smallest latency corresponding to the corresponding latency level among the at least two second candidate NTN cells;

[0221] Condition 4E: The target cell is the second candidate NTN cell with the smallest corresponding distance among the at least two second candidate NTN cells.

[0222] When the indication information includes information A, the fourth criterion may include condition 4A; when the indication information includes information B, the fourth criterion may include condition 4B; when the indication information includes information C, the fourth criterion may include condition 4C; when the indication information includes information D, the fourth criterion may include condition 4D; when the indication information includes information E, the fourth criterion may include condition 4E.

[0223] The fourth criterion may include one or more of conditions 4A, 4B, 4C, 4D, and 4E.

[0224] In one example, the fourth criterion includes condition 4B: for a second candidate NTN cell, if the terminal device determines that the number of hops of the inter-satellite link corresponding to the second candidate NTN cell is less than the number of hops of the inter-satellite link corresponding to other second candidate NTN cells, that is, the number of hops corresponding to the second candidate NTN cell is the smallest among all the number of hops corresponding to the second candidate NTN cells, then the second candidate NTN cell is determined to satisfy the fourth criterion.

[0225] In one example, the fourth criterion includes conditions 4B and 4C. The terminal device determines the second distance of each second candidate NTN cell based on the location of the NTN gateway corresponding to the multiple second candidate NTN cells and the location of the terminal device, and determines the latency information corresponding to each second candidate NTN cell. When the second distance corresponding to a second candidate NTN cell is the smallest and the latency represented by the corresponding latency information is the smallest, then the second candidate NTN cell is determined to satisfy the fourth criterion.

[0226] In practical applications, the fourth criterion for terminal equipment to determine the target cell may include one or more of the following conditions: condition 3A, condition 3B, condition 3C, condition 3D, condition 3E, condition 4A, condition 4B, condition 4C, condition 4D, and condition 4E.

[0227] In this embodiment of the application, when the terminal device determines the target cell based on the third and fourth criteria, the second candidate NTN cell in the above conditions 4A, 4B, 4C, 4D and 4E is an NTN cell that satisfies the third criterion.

[0228] In some embodiments, the criteria for cell reselection further include a fifth criterion, which is a beam-based criterion.

[0229] In one example, the fifth criterion is that the maximum number of beams satisfying the threshold absThreshSS-BloCksConsolidation is the largest.

[0230] In some embodiments, the fourth criterion has a higher priority than the fifth criterion; or,

[0231] Taking the example that the fourth criterion has a higher priority than the fifth criterion, the terminal device first performs the judgment based on the fourth criterion, and then performs the judgment based on the fifth criterion.

[0232] At this point, if the second candidate NTN cell meets the third criterion, and the second candidate NTN cell meets the fourth criterion, the terminal device continues to determine whether the second candidate NTN cell meets the fifth criterion. If the second candidate NTN cell meets the fifth criterion, the second candidate NTN cell is determined as the target cell; or, from multiple second candidate NTN cells, a second candidate NTN cell that meets the fourth criterion is determined, and the second candidate NTN cell that meets the fifth criterion among the second candidate NTN cells that meets the fourth criterion is determined as the target cell.

[0233] In one example, when a terminal device accesses NTN cell 1, for the neighboring cell of NTN cell 1, NTN cell 2, it determines whether NTN cell 2 meets the third criterion. If it meets the third criterion, it continues to determine whether NTN cell 2 meets the fourth criterion. If NTN cell 2 meets the fourth criterion, it continues to determine whether NTN cell 2 meets the fifth criterion. If NTN cell 2 meets the fifth criterion, it determines NTN cell 2 as the target cell, and the terminal device switches from NTN cell 1 to NTN cell 2. If NTN cell 2 does not meet the fifth criterion, the terminal device continues to camp on NTN cell 1.

[0234] In one example, when a terminal device accesses NTN cell 1, for NTN cell 1 and its neighboring cells: NTN cell 2 and NTN cell 3, the terminal device determines whether NTN cell 1, NTN cell 2 and NTN cell 3 meet the third criterion. If NTN cell 1 and NTN cell 2 meet the third criterion, then NTN cell 1 and NTN cell 2 are selected as second candidate NTN cells. The terminal device then determines whether NTN cell 1 and NTN cell 2 meet the fourth criterion. If NTN cell 1 and NTN cell 2 meet the fourth criterion, the terminal device then determines whether NTN cell 1 and NTN cell 2 meet the fifth criterion. If NTN cell 1 meets the fifth criterion, then NTN cell 1 is determined as the target cell and the terminal device continues to camp on NTN cell 1. If NTN cell 2 meets the fifth criterion, then NTN cell 2 is determined as the target cell and the terminal device switches from NTN cell 1 to NTN cell 2.

[0235] Taking the example where the priority of the fourth criterion is lower than that of the fifth criterion, the terminal device first performs the judgment based on the fifth criterion, and then performs the judgment based on the fourth criterion. At this time, the second candidate NTN cell is an NTN cell that satisfies both the third and fifth criteria. If the second candidate NTN cell satisfies the fourth criterion, the second candidate NTN cell is determined as the target cell; or, among multiple second candidate NTN cells, the second candidate NTN cell that satisfies the fourth criterion is determined as the target cell.

[0236] In one example, when a terminal device accesses NTN cell 1, for the neighboring cell of NTN cell 1, NTN cell 2, it determines whether NTN cell 2 meets the third criterion. If it meets the third criterion, it continues to determine whether NTN cell 2 meets the fifth criterion. If NTN cell 2 meets the fifth criterion, it continues to determine whether NTN cell 2 meets the fourth criterion. If NTN cell 2 meets the fourth criterion, it determines NTN cell 2 as the target cell, and the terminal device switches from NTN cell 1 to NTN cell 2. If NTN cell 2 does not meet the fourth criterion, the terminal device continues to camp on NTN cell 1.

[0237] In one example, when a terminal device accesses NTN cell 1, it determines whether NTN cell 1 and its neighboring cells, NTN cell 2 and NTN cell 3, meet the third and fifth criteria. If NTN cell 1 and NTN cell 2 meet the third criterion and the fifth criterion, then NTN cell 1 and NTN cell 2 are selected as second candidate NTN cells. The terminal device then determines whether NTN cell 1 and NTN cell 2 meet the fourth criterion. If NTN cell 1 meets the fourth criterion, then NTN cell 1 is determined as the target cell, and the terminal device continues to camp on NTN cell 1. If NTN cell 2 meets the fourth criterion, then NTN cell 2 is determined as the target cell, and the terminal device switches from NTN cell 1 to NTN cell 2.

[0238] Taking the fourth criterion as having a lower priority than the fifth criterion as an example, the fourth criterion includes at least one of the following conditions, in which case the second candidate NTN cell is either the second NTN cell or the third NTN cell that satisfies the third criterion and the fifth criterion:

[0239] Condition 5A: The target cell is the second candidate NTN cell with the smallest corresponding second distance among at least two second candidate NTN cells. The second distance is determined based on the location information of the NTN gateway. The second distance is the distance between the satellite covering the second candidate NTN cell and the NTN gateway.

[0240] Condition 5B: The target cell is the second candidate NTN cell with the smallest hop count of the corresponding inter-satellite link among the at least two second candidate NTN cells;

[0241] Condition 5C: The target cell is the second candidate NTN cell with the smallest corresponding latency information among the at least two second candidate NTN cells;

[0242] Condition 5D: The target cell is the second candidate NTN cell with the smallest latency corresponding to the corresponding latency level among the at least two second candidate NTN cells;

[0243] Condition 5E: The target cell is the second candidate NTN cell with the smallest corresponding distance among the at least two second candidate NTN cells.

[0244] In this embodiment of the application, when the terminal device performs cell reselection based on the third and fourth criteria, or based on the third, fourth and fifth criteria, and the fourth criterion has a higher priority than the fifth criterion, if the fourth criterion includes any one of the conditions 4A, 4B, 4C and 4D, the second candidate NTN cell in conditions 4A, 4B, 4C and 4D is an NTN cell that satisfies the third criterion, and the terminal device determines the second candidate NTN cell that satisfies the fourth and fifth criteria as the target cell. When a terminal device performs cell reselection based on criteria three, four, and five, and the priority of criterion four is lower than that of criterion five, if criterion four includes any of conditions 4A, 4B, 4C, and 4D, the second candidate NTN cell among conditions 4A, 4B, 4C, and 4D is an NTN cell that satisfies criteria three and five. That is, conditions 4A, 4B, 4C, and 4D are adjusted to the corresponding conditions 5A, 5B, 5C, and 5D. At this time, the terminal device determines the second candidate NTN cell that satisfies criterion four as the target cell.

[0245] In this embodiment of the application, no priority is set for the third, fourth and fifth criteria during the cell reselection process.

[0246] In some embodiments, the priority of the second criterion and the priority of the third criterion are configured by the network device.

[0247] The wireless communication method provided in this application embodiment can be applied to the following two scenarios:

[0248] Scenario 1: Choosing a residential community;

[0249] Scenario 2: Reselection of a residential area.

[0250] In Scenario 1, the terminal device receives indication information sent by the network device. This indication information contains details about the NTN gateway corresponding to the NTN cell. The terminal device selects a cell to camp on based on a first criterion and a second criterion. The second criterion is the criterion for cell selection based on the indication information.

[0251] In one example, the network device sends indication information corresponding to each NTN cell in NTN cell 1, NTN cell 2, NTN cell 3, and NTN cell 4 to the terminal device. The terminal device's stored information indicates NTN cell 1. The terminal device determines whether NTN cell 1 can be used as the camping cell based on the indication information corresponding to NTN cell 1. If NTN cell 1 can be used as the camping cell, the terminal device accesses NTN cell 1. Otherwise, the terminal device selects the camping cell from the searched NTN cells 2, NTN cell 3, and NTN cell 4 based on the indication information corresponding to each NTN cell in NTN cell 2, NTN cell 3, and NTN cell 4.

[0252] In scenario 2, the terminal device receives indication information sent by the network device. This indication information is related to the NTN gateway corresponding to the NTN cell. The terminal device selects the target cell based on a combination of the following criteria:

[0253] Criterion combination 1, criterion 3, and criterion 4;

[0254] Criterion combination 2, criterion 3, criterion 4, and criterion 5.

[0255] In one example, the terminal device accesses NTN cell 5. The network device sends indication information for each of the NTN cells (NTN cells 5, 6, 7, and 8) to the terminal device. NTN cells 6, 7, and 8 are neighboring cells of NTN cell 5. The terminal device determines the target cell based on the indication information for each of these NTN cells. If the target cell is NTN cell 5, the terminal device does not perform an NTN cell handover. If the target cell is NTN cell 6, the terminal device hands over from NTN cell 5 to NTN cell 6.

[0256] Optionally, the indication information includes at least one of the following:

[0257] Location of the NTN gateway;

[0258] The number of hops in the inter-satellite link between the satellites covering the NTN cell and the NTN gateway;

[0259] Latency information between satellites covering the NTN cell and the NTN gateway;

[0260] The latency level between the satellite covering the NTN cell and the NTN gateway;

[0261] The distance between the satellite covering the NTN cell and the NTN gateway.

[0262] In some embodiments, the indication information is carried in system information broadcast by the network device.

[0263] Network devices broadcast system information carrying indication information. Terminal devices listen to the system information broadcast by the network devices. If they hear the system information carrying indication information, they parse the system information to obtain the indication information.

[0264] In some embodiments, the system information includes at least one of the following:

[0265] Master Information Block (MIB) and System Information Block (SIB).

[0266] Here, SIB can be SB1 or SIB x, where x is greater than 1. SIB x is a collective term for system information blocks such as SIB2, SIB3, SIB4, etc.

[0267] Optionally, the indication information corresponding to different NTN cells can be carried on different system information.

[0268] In one example, the indication information corresponding to NTN cell 1 is carried on the MIB, and the indication information corresponding to NTN cell 2 is carried on the SIB.

[0269] In one example, the indication information corresponding to NTN cell 1 is carried on the SIB, and the indication information corresponding to NTN cell 2 is carried on the MIB.

[0270] Optionally, the indication information corresponding to the NTN cell when the terminal device is not connected to the network and the indication information corresponding to the NTN cell when the terminal device is connected to the network are carried on different system information.

[0271] In one example, when the terminal device is not connected to the network, the indication information corresponding to the NTN cell is carried on the MIB, and when the terminal device is connected to the network, the indication information corresponding to the NTN cell is carried on the SIB.

[0272] In one example, when the terminal device is not connected to the network, the indication information corresponding to the NTN cell is carried on SIB2, and when the terminal device is connected to the network, the indication information corresponding to the NTN cell is carried on SIB5.

[0273] The wireless communication method provided in this application embodiment will be described below through the scenarios of cell selection and cell reselection.

[0274] In idle or inactive states, the UE receives system messages broadcast by the satellite (gNB-DU or gNB), containing information about the current NTN cell or NTN neighboring cells. The system messages indicate the satellite ground station location information and / or the hop count of the inter-satellite link and / or the delay (or distance) from the satellite to the satellite ground station. During cell selection or cell reselection, the UE selects a suitable NTN cell for access based on the aforementioned information.

[0275] The implementation process is as follows:

[0276] 1. In idle or inactive state, the UE receives system messages from the current NTN cell, which are broadcast via satellite (gNB-DU or gNB) and contain one or more of the following information:

[0277] Current location information of NTN cell satellite ground station: Optional, for security reasons, it can be a coarse location (e.g., granularity > 2km) or geographical area;

[0278] The current hop count of inter-satellite links in NTN cells;

[0279] The current satellite-to-ground station latency (or distance) of the NTN cell: Optionally, to reduce signaling overhead, this information can be quantized and divided into different latency levels;

[0280] Information about one or more neighboring cells of the current NTN cell may include one or more of the following:

[0281] Location information of NTN neighboring satellite ground stations;

[0282] Hop count of NTN neighbor cell inter-satellite links;

[0283] The distance or time delay between NTN neighboring satellites and the satellite ground station.

[0284] 2. This system message can be MIB, SIB1, SIBx, etc., and can be carried in different system messages.

[0285] 3. Subsequently, when the UE performs cell selection reselection, the UE can select a suitable cell for access based on the above information broadcast by the current NTN cell, for example:

[0286] a) Among cells that meet the cell selection and reselection criteria based on RSRP / RSRQ, the UE prioritizes accessing the cell with the closest satellite ground station based on the information broadcast by the base station.

[0287] Specific implementation examples of UE cell selection / reselection include:

[0288] Example 1

[0289] Cell selection based on ground station location

[0290] The system message broadcast by the current NTN cell includes the location information of the satellite ground station of the current NTN cell; based on this information, cell selection is performed:

[0291] - If the current cell meets the S criterion and the distance between the UE location (obtained by the UE's GNSS) and the satellite ground station location of the current NTN cell is less than or equal to the corresponding threshold, then the cell is determined to be a camping cell;

[0292] Otherwise, the community is determined to be a non-resident community, and the community is abandoned.

[0293] or

[0294] - The UE selects the NTN cell that satisfies the S criterion and has the smallest distance as the stationary cell.

[0295] Example 2

[0296] Cell selection based on satellite-to-ground station latency

[0297] The system message broadcast by the current NTN cell includes the hop count of the inter-satellite link of the current NTN cell or the delay (or distance) from the satellite to the satellite ground station; based on this information, cell selection is performed:

[0298] - If the current cell satisfies the S criterion and the information is less than or equal to the corresponding threshold, then the cell is determined to be a camping cell;

[0299] Otherwise, the community is determined to be a non-resident community, and the community is abandoned.

[0300] or

[0301] - The UE selects the NTN cell that satisfies the S criterion and has the least amount of information as the cell to be camped.

[0302] Example 3

[0303] Cell reselection based on ground station location information

[0304] The system message broadcast by the current NTN cell includes the location information of the satellite ground station of the current NTN cell or a neighboring NTN cell; based on this information, cell reselection is performed:

[0305] -For cell reselection within the same frequency and different frequencies with the same priority:

[0306] - The current cell and candidate cells are sorted according to the cell reselection R criterion;

[0307] - The candidate cell is controlled by rangeToBestCell, that is: among all candidate cells within the rangeToBestCell range of the signal quality difference from the best cell, the candidate cell with the smallest distance between the UE location (obtained by the UE's GNSS) and the satellite ground station location of the candidate cell is selected as the target cell. Optionally, it can also be combined with the existing condition "the cell with the most beams that meet the threshold", and the priority of the two conditions can be configured by the network.

[0308] Example 4

[0309] Cell reselection based on satellite-to-ground station latency

[0310] The system message broadcast by the current NTN cell includes the hop count of the inter-satellite link of the current NTN cell or its neighboring cells, or the delay (or distance) from the satellite to the satellite ground station; based on this information, cell reselection is performed:

[0311] -For cell reselection within the same frequency and different frequencies with the same priority:

[0312] - The current cell and candidate cells are sorted according to the cell reselection R criterion;

[0313] - The candidate cells are controlled by rangeToBestCell, that is, among all candidate cells within the rangeToBestCell of the signal quality difference from the best cell, the candidate cell with the smallest difference in signal quality is selected as the target cell. Optionally, it can also be combined with the existing condition "the cell with the most beams that meet the threshold", and the priority of the two conditions can be configured by the network.

[0314] In satellite networks, for satellites supporting regenerative forwarding architectures with inter-satellite links, the introduction of these links means the satellite (gNB-DU or gNB) may connect to distant ground stations via one or more hops. This results in significant latency between the UE accessing the satellite's NTN cell and the data network, making some UEs with latency-critical services unsuitable for accessing this satellite. The proposed solution provides the UE with the ground station location information and backhaul link latency information of the satellite (gNB-DU or gNB). When the UE performs cell selection reselection, in addition to cell selection reselection criteria based on RSRP or distance, the UE can select the optimal cell for access based on this information, avoiding excessive latency.

[0315] The preferred embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solutions of this application, and these simple modifications all fall within the protection scope of this application. For example, the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this application will not describe the various possible combinations separately. Furthermore, various different embodiments of this application can also be arbitrarily combined, as long as they do not violate the spirit of this application, they should also be considered as the content disclosed in this application. Moreover, without conflict, the various embodiments and / or the technical features in the various embodiments described in this application can be arbitrarily combined with the prior art, and the resulting technical solutions should also fall within the protection scope of this application.

[0316] It should also be understood that in the various method embodiments of this application, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. Furthermore, in the embodiments of this application, the terms "downlink," "uplink," and "sidelink" are used to indicate the transmission direction of signals or data. "Downlink" indicates that the transmission direction of signals or data is a first direction from the site to the user equipment in the cell; "uplink" indicates that the transmission direction of signals or data is a second direction from the user equipment in the cell to the site; and "sidelink" indicates that the transmission direction of signals or data is a third direction from user equipment 1 to user equipment 2. For example, "downlink signal" indicates that the transmission direction of the signal is the first direction. Additionally, in the embodiments of this application, the term "and / or" is merely a description of the association relationship between related objects, indicating that three relationships can exist. Specifically, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0317] Figure 11 This is a schematic diagram of the structural composition of the wireless communication device provided in the embodiments of this application. Figure 1 Applied to terminal devices, such as Figure 11 As shown, the wireless communication device 1100 includes:

[0318] The receiving unit 1101 is configured to receive indication information sent by the network device; the indication information is information related to the NTN gateway corresponding to the NTN cell; the indication information is used by the terminal device to perform cell selection or cell reselection.

[0319] In some embodiments, the indication information includes at least one of the following:

[0320] The location information of the NTN gateway;

[0321] The number of hops in the inter-satellite link between the satellites covering the NTN cell and the NTN gateway;

[0322] The latency information between the satellites covering the NTN cell and the NTN gateway;

[0323] The latency level between the satellites covering the NTN cell and the NTN gateway;

[0324] The distance between the satellite covering the NTN cell and the NTN gateway.

[0325] In some embodiments, when the terminal device is not connected to an NTN cell, the terminal device performs cell selection based on indication information corresponding to at least one first NTN cell to determine the cell to camp on, wherein the first NTN cell is an NTN cell that the terminal device is not connected to.

[0326] In some embodiments, the criteria for cell selection by the terminal device include:

[0327] The first criterion is a criterion for cell selection based on signal quality;

[0328] The second criterion is a criterion for cell selection based on the indication information;

[0329] The first criterion has a higher priority than the second criterion.

[0330] In some embodiments, the second criterion includes at least one of the following conditions:

[0331] The first distance corresponding to the residential cell is less than the first distance threshold. The first distance corresponding to the residential cell is determined based on the location information of the NTN gateway corresponding to the residential cell. The first distance corresponding to the residential cell is the distance between the satellite covering the residential cell and the NTN gateway.

[0332] The number of hops of the inter-satellite link corresponding to the stationed cell is less than the first hop count threshold;

[0333] The latency information corresponding to the stationed cell is less than the first latency threshold;

[0334] The latency corresponding to the latency level of the stationed cell is less than the latency corresponding to the set first latency level;

[0335] The distance to the residential cell is less than the second distance threshold.

[0336] In some embodiments, the second criterion includes at least one of the following conditions:

[0337] The stationed cell is the first candidate NTN cell with the smallest corresponding first distance among at least two first candidate NTN cells. The first candidate NTN cell is the first NTN cell that satisfies the first criterion. The first distance is determined based on the location information of the NTN gateway. The first distance is the distance between the satellite covering the first candidate NTN cell and the NTN gateway.

[0338] The stationed cell is the first candidate NTN cell with the smallest hop count of the corresponding inter-satellite link among the at least two first candidate NTN cells;

[0339] The stationed cell is the first candidate NTN cell with the smallest corresponding latency information among the at least two first candidate NTN cells;

[0340] The stationed cell is the first candidate NTN cell with the smallest latency corresponding to the corresponding latency level among the at least two first candidate NTN cells;

[0341] The stationed cell is the first candidate NTN cell with the smallest corresponding distance among the at least two first candidate NTN cells.

[0342] In some embodiments, when the terminal device accesses the second NTN cell, the terminal device performs cell reselection based on the indication information corresponding to the second NTN cell and the indication information corresponding to the third NTN cell to determine the target cell. The second NTN cell is the NTN cell currently accessed by the terminal device, and the third NTN cell is a neighboring cell of the second NTN cell.

[0343] In some embodiments, the criteria for cell reselection by the terminal device include:

[0344] The third criterion is a criterion for cell reselection based on signal quality;

[0345] The fourth criterion is a criterion for cell reselection based on the indication information;

[0346] The third criterion has a higher priority than the fourth criterion.

[0347] In some embodiments, the fourth criterion includes at least one of the following conditions:

[0348] The second distance corresponding to the target cell is less than the third distance threshold. The second distance corresponding to the target cell is determined based on the location information of the NTN gateway corresponding to the target cell. The second distance corresponding to the target cell is the distance between the satellite covering the target cell and the NTN gateway.

[0349] The number of hops in the inter-satellite link corresponding to the target cell is less than the second hop count threshold;

[0350] The latency information corresponding to the target cell is less than the second latency threshold;

[0351] The latency corresponding to the latency level of the target cell is less than the latency corresponding to the set second latency level;

[0352] The distance to the target cell is less than the fourth distance threshold.

[0353] In some embodiments, the fourth criterion includes at least one of the following conditions:

[0354] The target cell is the second candidate NTN cell with the smallest corresponding second distance among at least two second candidate NTN cells. The second candidate NTN cell is either a second NTN cell or a third NTN cell that at least satisfies the third criterion. The second distance is determined based on the location information of the NTN gateway. The second distance is the distance between the satellite covering the second candidate NTN cell and the NTN gateway.

[0355] The target cell is the second candidate NTN cell with the smallest hop count of the corresponding inter-satellite link among the at least two second candidate NTN cells;

[0356] The target cell is the second candidate NTN cell with the smallest corresponding latency information among the at least two second candidate NTN cells;

[0357] The target cell is the second candidate NTN cell with the smallest latency corresponding to the corresponding latency level among the at least two second candidate NTN cells;

[0358] The target cell is the second candidate NTN cell with the smallest corresponding distance among the at least two second candidate NTN cells.

[0359] In some embodiments, the criteria for cell reselection by the terminal device further include:

[0360] The fifth criterion is a beam-based criterion.

[0361] In some embodiments, the fourth criterion has a higher priority than the fifth criterion; or,

[0362] The fourth criterion has a lower priority than the fifth criterion.

[0363] In some embodiments, the priority of the fourth criterion and the priority of the fifth criterion are configured by the network device.

[0364] In some embodiments, when the priority of the fourth criterion is lower than the priority of the fifth criterion, and the fourth criterion includes at least one of the following conditions, the second candidate NTN cell is either the second NTN cell or the third NTN cell that satisfies the third criterion and the fifth criterion:

[0365] The target cell is the second candidate NTN cell with the smallest corresponding second distance among at least two second candidate NTN cells. The second distance is determined based on the location information of the NTN gateway. The second distance is the distance between the satellite covering the second candidate NTN cell and the NTN gateway.

[0366] The target cell is the second candidate NTN cell with the smallest hop count of the corresponding inter-satellite link among the at least two second candidate NTN cells;

[0367] The target cell is the second candidate NTN cell with the smallest corresponding latency information among the at least two second candidate NTN cells;

[0368] The target cell is the second candidate NTN cell with the smallest latency corresponding to the corresponding latency level among the at least two second candidate NTN cells;

[0369] The target cell is the second candidate NTN cell with the smallest corresponding distance among the at least two second candidate NTN cells.

[0370] In some embodiments, the indication information is carried in system information broadcast by the network device.

[0371] In some embodiments, the system information includes at least one of the following:

[0372] MIB, SIB.

[0373] Figure 12 This is a schematic diagram of the structural composition of the wireless communication device provided in the embodiments of this application. Figure 1 Applied to network devices, such as Figure 12 As shown, the wireless communication device 1200 includes:

[0374] The sending unit 1201 is configured to send indication information to the terminal device; the indication information is information related to the NTN gateway corresponding to the non-terrestrial network communication NTN cell; the indication information is used by the terminal device to perform cell selection or cell reselection.

[0375] In some embodiments, the indication information includes at least one of the following:

[0376] The location information of the NTN gateway;

[0377] The number of hops in the inter-satellite link between the satellites covering the NTN cell and the NTN gateway;

[0378] The latency information between the satellites covering the NTN cell and the NTN gateway;

[0379] The latency level between the satellites covering the NTN cell and the NTN gateway;

[0380] The distance between the satellite covering the NTN cell and the NTN gateway.

[0381] In some embodiments, when the terminal device is not connected to an NTN cell, the cell selected for camping is determined based on indication information corresponding to at least one first NTN cell, wherein the first NTN cell is an NTN cell that the terminal device is not connected to.

[0382] In some embodiments, the criteria for cell selection include:

[0383] The first criterion is a criterion for cell selection based on signal quality;

[0384] The second criterion is a criterion for cell selection based on the indication information;

[0385] The first criterion has a higher priority than the second criterion.

[0386] In some embodiments, the second criterion includes at least one of the following conditions:

[0387] The first distance corresponding to the residential cell is less than the first distance threshold. The first distance corresponding to the residential cell is determined based on the location information of the NTN gateway corresponding to the residential cell. The first distance corresponding to the residential cell is the distance between the satellite covering the residential cell and the NTN gateway.

[0388] The number of hops of the inter-satellite link corresponding to the stationed cell is less than the first hop count threshold;

[0389] The latency information corresponding to the stationed cell is less than the first latency threshold;

[0390] The latency corresponding to the latency level of the stationed cell is less than the latency corresponding to the set first latency level;

[0391] The distance to the residential cell is less than the second distance threshold.

[0392] In some embodiments, the second criterion includes at least one of the following conditions:

[0393] The stationed cell is the first candidate NTN cell with the smallest corresponding first distance among at least two first candidate NTN cells. The first candidate NTN cell is the first NTN cell that satisfies the first criterion. The first distance is determined based on the location information of the NTN gateway. The first distance is the distance between the satellite covering the first candidate NTN cell and the NTN gateway.

[0394] The stationed cell is the first candidate NTN cell with the smallest hop count of the corresponding inter-satellite link among the at least two first candidate NTN cells;

[0395] The stationed cell is the first candidate NTN cell with the smallest corresponding latency information among the at least two first candidate NTN cells;

[0396] The stationed cell is the first candidate NTN cell with the smallest latency corresponding to the corresponding latency level among the at least two first candidate NTN cells;

[0397] The stationed cell is the first candidate NTN cell with the smallest corresponding distance among the at least two first candidate NTN cells.

[0398] In some embodiments, when the terminal device accesses the second NTN cell, the target cell for cell reselection is determined based on the indication information corresponding to the second NTN cell and the indication information corresponding to the third NTN cell. The second NTN cell is the NTN cell currently accessed by the terminal device, and the third NTN cell is a neighboring cell of the second NTN cell.

[0399] In some embodiments, the criteria for cell reselection include:

[0400] The third criterion is a criterion for cell reselection based on signal quality;

[0401] The fourth criterion is a criterion for cell reselection based on the indication information;

[0402] The third criterion has a higher priority than the fourth criterion.

[0403] In some embodiments, the fourth criterion includes at least one of the following conditions:

[0404] The second distance corresponding to the target cell is less than the third distance threshold. The second distance corresponding to the target cell is determined based on the location information of the NTN gateway corresponding to the target cell. The second distance corresponding to the target cell is the distance between the satellite covering the target cell and the NTN gateway.

[0405] The number of hops in the inter-satellite link corresponding to the target cell is less than the second hop count threshold;

[0406] The latency information corresponding to the target cell is less than the second latency threshold;

[0407] The latency corresponding to the latency level of the target cell is less than the latency corresponding to the set second latency level;

[0408] The distance to the target cell is less than the fourth distance threshold.

[0409] In some embodiments, the fourth criterion includes at least one of the following conditions:

[0410] The target cell is the second candidate NTN cell with the smallest corresponding second distance among at least two second candidate NTN cells. The second candidate NTN cell is either a second NTN cell or a third NTN cell that at least satisfies the third criterion. The second distance is determined based on the location information of the NTN gateway. The second distance is the distance between the satellite covering the second candidate NTN cell and the NTN gateway.

[0411] The target cell is the second candidate NTN cell with the smallest hop count of the corresponding inter-satellite link among the at least two second candidate NTN cells;

[0412] The target cell is the second candidate NTN cell with the smallest corresponding latency information among the at least two second candidate NTN cells;

[0413] The target cell is the second candidate NTN cell with the smallest latency corresponding to the corresponding latency level among the at least two second candidate NTN cells;

[0414] The target cell is the second candidate NTN cell with the smallest corresponding distance among the at least two second candidate NTN cells.

[0415] In some embodiments, the criteria for cell reselection also include:

[0416] The fifth criterion is a beam-based criterion.

[0417] In some embodiments, the fourth criterion has a higher priority than the fifth criterion; or,

[0418] The fourth criterion has a lower priority than the fifth criterion.

[0419] In some embodiments, the priority of the fourth criterion and the priority of the fifth criterion are configured by the network device.

[0420] In some embodiments, when the priority of the fourth criterion is lower than the priority of the fifth criterion, and the fourth criterion includes at least one of the following conditions, the second candidate NTN cell is either the second NTN cell or the third NTN cell that satisfies the third criterion and the fifth criterion:

[0421] The target cell is the second candidate NTN cell with the smallest corresponding second distance among at least two second candidate NTN cells. The second distance is determined based on the location information of the NTN gateway. The second distance is the distance between the satellite covering the second candidate NTN cell and the NTN gateway.

[0422] The target cell is the second candidate NTN cell with the smallest hop count of the corresponding inter-satellite link among the at least two second candidate NTN cells;

[0423] The target cell is the second candidate NTN cell with the smallest corresponding latency information among the at least two second candidate NTN cells;

[0424] The target cell is the second candidate NTN cell with the smallest latency corresponding to the corresponding latency level among the at least two second candidate NTN cells;

[0425] The target cell is the second candidate NTN cell with the smallest corresponding distance among the at least two second candidate NTN cells.

[0426] In some embodiments, the indication information is carried in system information broadcast by the network device.

[0427] In some embodiments, the system information includes at least one of the following:

[0428] MIB, SIB.

[0429] Those skilled in the art should understand that the description of the wireless communication device in the embodiments of this application can be understood with reference to the description of the wireless communication method in the embodiments of this application.

[0430] Figure 13 This is a schematic structural diagram of a communication device 1300 provided in an embodiment of this application. This communication device can be a terminal device or a network device. Figure 13 The communication device 1300 shown includes a processor 1310, which can call and run computer programs from memory to implement the methods in the embodiments of this application.

[0431] Optionally, such as Figure 13 As shown, the communication device 1300 may further include a memory 1320. The processor 1310 can retrieve and run computer programs from the memory 1320 to implement the methods described in this embodiment.

[0432] The memory 1320 can be a separate device independent of the processor 1310, or it can be integrated into the processor 1310.

[0433] Optionally, such as Figure 13 As shown, the communication device 1300 may also include a transceiver 1330, and the processor 1310 may control the transceiver 1330 to communicate with other devices. Specifically, it may send information or data to other devices or receive information or data sent by other devices.

[0434] The transceiver 1330 may include a transmitter and a receiver. The transceiver 1330 may further include an antenna, and the number of antennas may be one or more.

[0435] Optionally, the communication device 1300 may specifically be a network device in the embodiments of this application, and the communication device 1300 may implement the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0436] Optionally, the communication device 1300 may specifically be a mobile terminal / terminal device in the embodiments of this application, and the communication device 1300 may implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0437] Figure 14 This is a schematic structural diagram of the chip according to an embodiment of this application. Figure 14 The chip 1400 shown includes a processor 1410, which can call and run computer programs from memory to implement the methods in the embodiments of this application.

[0438] Optionally, such as Figure 14 As shown, chip 1400 may further include memory 1420. Processor 1410 can retrieve and run computer programs from memory 1420 to implement the methods described in this embodiment.

[0439] The memory 1420 can be a separate device independent of the processor 1410, or it can be integrated into the processor 1410.

[0440] Optionally, the chip 1400 may also include an input interface 1430. The processor 1410 can control the input interface 1430 to communicate with other devices or chips; specifically, it can acquire information or data sent by other devices or chips.

[0441] Optionally, the chip 1400 may also include an output interface 1440. The processor 1410 can control the output interface 1440 to communicate with other devices or chips, specifically, to output information or data to other devices or chips.

[0442] Optionally, the chip can be applied to the network device in the embodiments of this application, and the chip can implement the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0443] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of this application, and the chip can implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0444] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0445] Figure 15 This is a schematic block diagram of a communication system 1500 provided in an embodiment of this application. Figure 15 As shown, the communication system 1500 includes a terminal device 1510 and a network device 1520.

[0446] The terminal device 1510 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1520 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, these will not be elaborated here.

[0447] It should be understood that the processor in the embodiments of this application may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor described above can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0448] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0449] It should be understood that the above-described memory is exemplary and not a limiting description. For example, the memory in the embodiments of this application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DR RAM), etc. That is to say, the memory in the embodiments of this application is intended to include, but is not limited to, these and any other suitable types of memory.

[0450] This application also provides a computer-readable storage medium for storing computer programs.

[0451] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of this application, and the computer program causes the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0452] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of this application, and the computer program causes the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0453] This application also provides a computer program product, including computer program instructions.

[0454] Optionally, the computer program product can be applied to the network device in the embodiments of this application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, they will not be described in detail here.

[0455] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of this application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, they will not be described in detail here.

[0456] This application also provides a computer program.

[0457] Optionally, the computer program can be applied to the network device in the embodiments of this application. When the computer program is run on a computer, it causes the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0458] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of this application. When the computer program is run on a computer, it causes the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0459] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0460] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0461] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0462] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0463] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0464] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0465] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A wireless communication method, the method comprising: The terminal device receives instruction information sent by the network device; The indication information is related to the NTN gateway corresponding to the non-terrestrial network communication NTN cell; The indication information is used by the terminal device to perform cell selection or cell reselection; The indication information is used to reflect the latency between the satellite covering the NTN cell and the NTN gateway; The indication information includes at least one of the following between the satellite covering the NTN cell and the NTN gateway: hop count of the inter-satellite link, latency information, latency level, and distance.

2. The method according to claim 1, wherein, The instruction information also includes: The location information of the NTN gateway.

3. The method according to claim 2, wherein, When the terminal device is not connected to an NTN cell, the terminal device selects a cell based on indication information corresponding to at least one first NTN cell to determine the cell to camp on, wherein the first NTN cell is an NTN cell that the terminal device is not connected to.

4. The method according to claim 3, wherein, The criteria for selecting a neighborhood include: The first criterion is a criterion for cell selection based on signal quality; The second criterion is a criterion for cell selection based on the indication information; The first criterion has a higher priority than the second criterion.

5. The method according to claim 4, wherein, The second criterion includes at least one of the following conditions: The first distance corresponding to the residential cell is less than the first distance threshold. The first distance corresponding to the residential cell is determined based on the location information of the NTN gateway corresponding to the residential cell. The first distance corresponding to the residential cell is the distance between the satellite covering the residential cell and the NTN gateway. The number of hops of the inter-satellite link corresponding to the stationed cell is less than the first hop count threshold; The latency information corresponding to the stationed cell is less than the first latency threshold; The latency corresponding to the latency level of the stationed cell is less than the latency corresponding to the set first latency level; The distance to the residential cell is less than the second distance threshold.

6. The method according to claim 4 or 5, wherein, The second criterion includes at least one of the following conditions: The stationed cell is the first candidate NTN cell with the smallest corresponding first distance among at least two first candidate NTN cells. The first candidate NTN cell is the first NTN cell that satisfies the first criterion. The first distance is determined based on the location information of the NTN gateway. The first distance is the distance between the satellite covering the first candidate NTN cell and the NTN gateway. The stationed cell is the first candidate NTN cell with the smallest hop count of the corresponding inter-satellite link among the at least two first candidate NTN cells; The stationed cell is the first candidate NTN cell with the smallest corresponding latency information among the at least two first candidate NTN cells; The stationed cell is the first candidate NTN cell with the smallest latency corresponding to the corresponding latency level among the at least two first candidate NTN cells; The stationed cell is the first candidate NTN cell with the smallest corresponding distance among the at least two first candidate NTN cells.

7. The method according to claim 2, wherein, When the terminal device accesses the second NTN cell, the terminal device performs cell reselection based on the indication information corresponding to the second NTN cell and the indication information corresponding to the third NTN cell to determine the target cell. The second NTN cell is the NTN cell currently accessed by the terminal device, and the third NTN cell is a neighboring cell of the second NTN cell.

8. The method according to claim 7, wherein, The criteria for neighborhood re-election include: The third criterion is a criterion for cell reselection based on signal quality; The fourth criterion is a criterion for cell reselection based on the indication information; The third criterion has a higher priority than the fourth criterion.

9. The method according to claim 8, wherein, The fourth criterion includes at least one of the following conditions: The second distance corresponding to the target cell is less than the third distance threshold. The second distance corresponding to the target cell is determined based on the location information of the NTN gateway corresponding to the target cell. The second distance corresponding to the target cell is the distance between the satellite covering the target cell and the NTN gateway. The number of hops in the inter-satellite link corresponding to the target cell is less than the second hop count threshold; The latency information corresponding to the target cell is less than the second latency threshold; The latency corresponding to the latency level of the target cell is less than the latency corresponding to the set second latency level; The distance to the target cell is less than the fourth distance threshold.

10. The method according to claim 8, wherein, The fourth criterion includes at least one of the following conditions: The target cell is the second candidate NTN cell with the smallest corresponding second distance among at least two second candidate NTN cells. The second candidate NTN cell is either a second NTN cell or a third NTN cell that at least satisfies the third criterion. The second distance is determined based on the location information of the NTN gateway. The second distance is the distance between the satellite covering the second candidate NTN cell and the NTN gateway. The target cell is the second candidate NTN cell with the smallest hop count of the corresponding inter-satellite link among the at least two second candidate NTN cells; The target cell is the second candidate NTN cell with the smallest corresponding latency information among the at least two second candidate NTN cells; The target cell is the second candidate NTN cell with the smallest latency corresponding to the corresponding latency level among the at least two second candidate NTN cells; The target cell is the second candidate NTN cell with the smallest corresponding distance among the at least two second candidate NTN cells.

11. The method according to any one of claims 8 to 10, wherein, The criteria for neighborhood re-election also include: The fifth criterion is a beam-based criterion.

12. The method according to claim 11, wherein, The fourth criterion has a higher priority than the fifth criterion; or, the fourth criterion has a lower priority than the fifth criterion.

13. The method according to claim 11, wherein, The priority of the fourth criterion and the priority of the fifth criterion are configured by the network device.

14. The method according to claim 12, wherein, When the priority of the fourth criterion is lower than that of the fifth criterion, and the fourth criterion includes at least one of the following conditions, the second candidate NTN cell is either the second NTN cell or the third NTN cell that satisfies the third criterion and the fifth criterion: The target cell is the second candidate NTN cell with the smallest corresponding second distance among at least two second candidate NTN cells. The second distance is determined based on the location information of the NTN gateway. The second distance is the distance between the satellite covering the second candidate NTN cell and the NTN gateway. The target cell is the second candidate NTN cell with the smallest hop count of the corresponding inter-satellite link among the at least two second candidate NTN cells; The target cell is the second candidate NTN cell with the smallest corresponding latency information among the at least two second candidate NTN cells; The target cell is the second candidate NTN cell with the smallest latency corresponding to the corresponding latency level among the at least two second candidate NTN cells; The target cell is the second candidate NTN cell with the smallest corresponding distance among the at least two second candidate NTN cells.

15. The method according to any one of claims 1 to 5, 7 to 10, wherein, The instruction information is carried in the system information broadcast by the network device.

16. The method according to claim 15, wherein, The system information includes at least one of the following: Master Information Block (MIB) and System Information Block (SIB).

17. A wireless communication method, comprising: Network devices send instruction information to terminal devices; The indication information is related to the NTN gateway corresponding to the non-terrestrial network communication NTN cell; The indication information is used by the terminal device to perform cell selection or cell reselection; The indication information is used to reflect the latency between the satellite covering the NTN cell and the NTN gateway; The indication information includes at least one of the following between the satellite covering the NTN cell and the NTN gateway: hop count of the inter-satellite link, latency information, latency level, and distance.

18. The method according to claim 17, wherein, The instruction information also includes: The location information of the NTN gateway.

19. The method according to claim 18, wherein, When the terminal device is not connected to an NTN cell, the cell selected for camping is determined based on indication information corresponding to at least one first NTN cell, where the first NTN cell is an NTN cell that the terminal device is not connected to.

20. The method according to claim 19, wherein, The criteria for selecting a neighborhood include: The first criterion is a criterion for cell selection based on signal quality; The second criterion is a criterion for cell selection based on the indication information; The first criterion has a higher priority than the second criterion.

21. The method according to claim 20, wherein, The second criterion includes at least one of the following conditions: The first distance corresponding to the residential cell is less than the first distance threshold. The first distance corresponding to the residential cell is determined based on the location information of the NTN gateway corresponding to the residential cell. The first distance corresponding to the residential cell is the distance between the satellite covering the residential cell and the NTN gateway. The number of hops of the inter-satellite link corresponding to the stationed cell is less than the first hop count threshold; The latency information corresponding to the stationed cell is less than the first latency threshold; The latency corresponding to the latency level of the stationed cell is less than the latency corresponding to the set first latency level; The distance to the residential cell is less than the second distance threshold.

22. The method according to claim 20 or 21, wherein, The second criterion includes at least one of the following conditions: The stationed cell is the first candidate NTN cell with the smallest corresponding first distance among at least two first candidate NTN cells. The first candidate NTN cell is the first NTN cell that satisfies the first criterion. The first distance is determined based on the location information of the NTN gateway. The first distance is the distance between the satellite covering the first candidate NTN cell and the NTN gateway. The stationed cell is the first candidate NTN cell with the smallest hop count of the corresponding inter-satellite link among the at least two first candidate NTN cells; The stationed cell is the first candidate NTN cell with the smallest corresponding latency information among the at least two first candidate NTN cells; The stationed cell is the first candidate NTN cell with the smallest latency corresponding to the corresponding latency level among the at least two first candidate NTN cells; The stationed cell is the first candidate NTN cell with the smallest corresponding distance among the at least two first candidate NTN cells.

23. The method according to claim 18, wherein, When the terminal device accesses the second NTN cell, the target cell for cell reselection is determined based on the indication information corresponding to the second NTN cell and the indication information corresponding to the third NTN cell. The second NTN cell is the NTN cell currently accessed by the terminal device, and the third NTN cell is a neighboring cell of the second NTN cell.

24. The method according to claim 23, wherein, The criteria for neighborhood re-election include: The third criterion is a criterion for cell reselection based on signal quality; The fourth criterion is a criterion for cell reselection based on the indication information; The third criterion has a higher priority than the fourth criterion.

25. The method according to claim 24, wherein, The fourth criterion includes at least one of the following conditions: The second distance corresponding to the target cell is less than the third distance threshold. The second distance corresponding to the target cell is determined based on the location information of the NTN gateway corresponding to the target cell. The second distance corresponding to the target cell is the distance between the satellite covering the target cell and the NTN gateway. The number of hops in the inter-satellite link corresponding to the target cell is less than the second hop count threshold; The latency information corresponding to the target cell is less than the second latency threshold; The latency corresponding to the latency level of the target cell is less than the latency corresponding to the set second latency level; The distance to the target cell is less than the fourth distance threshold.

26. The method according to claim 24, wherein, The fourth criterion includes at least one of the following conditions: The target cell is the second candidate NTN cell with the smallest corresponding second distance among at least two second candidate NTN cells. The second candidate NTN cell is either a second NTN cell or a third NTN cell that at least satisfies the third criterion. The second distance is determined based on the location information of the NTN gateway. The second distance is the distance between the satellite covering the second candidate NTN cell and the NTN gateway. The target cell is the second candidate NTN cell with the smallest hop count of the corresponding inter-satellite link among the at least two second candidate NTN cells; The target cell is the second candidate NTN cell with the smallest corresponding latency information among the at least two second candidate NTN cells; The target cell is the second candidate NTN cell with the smallest latency corresponding to the corresponding latency level among the at least two second candidate NTN cells; The target cell is the second candidate NTN cell with the smallest corresponding distance among the at least two second candidate NTN cells.

27. The method according to any one of claims 24 to 26, wherein, The criteria for neighborhood re-election also include: The fifth criterion is a beam-based criterion.

28. The method according to claim 27, wherein, The fourth criterion has a higher priority than the fifth criterion; or, the fourth criterion has a lower priority than the fifth criterion.

29. The method according to claim 27, wherein, The priority of the fourth criterion and the priority of the fifth criterion are configured by the network device.

30. The method according to claim 28, wherein, When the priority of the fourth criterion is lower than that of the fifth criterion, and the fourth criterion includes at least one of the following conditions, the second candidate NTN cell is either the second NTN cell or the third NTN cell that satisfies the third criterion and the fifth criterion: The target cell is the second candidate NTN cell with the smallest corresponding second distance among at least two second candidate NTN cells. The second distance is determined based on the location information of the NTN gateway. The second distance is the distance between the satellite covering the second candidate NTN cell and the NTN gateway. The target cell is the second candidate NTN cell with the smallest hop count of the corresponding inter-satellite link among the at least two second candidate NTN cells; The target cell is the second candidate NTN cell with the smallest corresponding latency information among the at least two second candidate NTN cells; The target cell is the second candidate NTN cell with the smallest latency corresponding to the corresponding latency level among the at least two second candidate NTN cells; The target cell is the second candidate NTN cell with the smallest corresponding distance among the at least two second candidate NTN cells.

31. The method according to any one of claims 17 to 21, 23 to 26, wherein, The instruction information is carried in the system information broadcast by the network device.

32. The method according to claim 31, wherein, The system information includes at least one of the following: Master Information Block (MIB) and System Information Block (SIB).

33. A wireless communication device, applied to a terminal device, comprising: The receiving unit is configured to receive indication information sent by the network device; The indication information is related to the NTN gateway corresponding to the non-terrestrial network communication NTN cell; The indication information is used by the terminal device to perform cell selection or cell reselection; The indication information is used to reflect the latency between the satellite covering the NTN cell and the NTN gateway; The indication information includes at least one of the following between the satellite covering the NTN cell and the NTN gateway: hop count of the inter-satellite link, latency information, latency level, and distance.

34. A wireless communication device, applied to a network device, comprising: The sending unit is configured to send indication information to the terminal device; The indication information is related to the NTN gateway corresponding to the non-terrestrial network communication NTN cell; The indication information is used by the terminal device to perform cell selection or cell reselection; The indication information is used to reflect the latency between the satellite covering the NTN cell and the NTN gateway; The indication information includes at least one of the following between the satellite covering the NTN cell and the NTN gateway: hop count of the inter-satellite link, latency information, latency level, and distance.

35. A terminal device, comprising: A processor and a memory for storing a computer program, the processor for calling and running the computer program stored in the memory to perform the method as described in any one of claims 1 to 16.

36. A network device, comprising: A processor and a memory for storing a computer program, the processor for calling and running the computer program stored in the memory to perform the method as described in any one of claims 17 to 32.

37. A chip, comprising: A processor for retrieving and running a computer program from memory, causing a device on which the chip is mounted to perform the method as described in any one of claims 1 to 16.

38. A chip, comprising: A processor for retrieving and running a computer program from memory, causing a device on which the chip is mounted to perform the method as described in any one of claims 17 to 32.

39. A computer-readable storage medium for storing a computer program that causes a computer to perform the method as described in any one of claims 1 to 16.

40. A computer-readable storage medium for storing a computer program that causes a computer to perform the method as described in any one of claims 17 to 32.

41. A computer program product comprising computer program instructions that cause a computer to perform the method as described in any one of claims 1 to 16.

42. A computer program product comprising computer program instructions that cause a computer to perform the method as described in any one of claims 17 to 32.

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