WO2023082191A1

WO2023082191A1 - Wireless communication method and apparatus, communication device, and storage medium

Info

Publication number: WO2023082191A1
Application number: PCT/CN2021/130399
Authority: WO
Inventors: 于新磊; 胡奕; 李海涛
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2023-05-19
Also published as: CN117751617A

Abstract

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

Description

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

technical field

The embodiments of the present application relate to the technical field of mobile communication, and in particular to a wireless communication method, device, communication device, and storage medium.

Background technique

Non-terrestrial network (Non Terrestrial Network, NTN) provides communication services to ground users in the form of communication satellite communication. Compared with terrestrial cellular network communication, communication satellite communication has many unique advantages, such as: not subject to user geographical restrictions, long communication distance, high stability, etc.

In NTN, the satellite may be connected to the satellite ground station through one hop or multiple inter-satellite links. If cell selection or reselection is performed based on the reference signal receiving power (RSRP) measurement value of the terminal, it will cause The communication between the terminal connected to the NTN cell of the satellite and the satellite ground station does not meet the service requirements of the terminal.

Contents of the invention

Embodiments of the present application provide a wireless communication method, device, communication device, and storage medium.

The wireless communication method provided in the embodiment of the present application includes:

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

The network device sends indication information to the terminal equipment; the indication information is information related to the NTN gateway corresponding to the NTN cell; the indication information is used for the terminal equipment to perform cell selection or cell reselection.

The wireless communication device provided in the embodiment of the present application is applied to a terminal device, including:

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

The wireless communication device provided in the embodiment of this application is applied to network equipment, including:

The sending unit is configured to send indication information to the terminal equipment; the indication information is information related to the NTN gateway corresponding to the NTN cell; the indication information is used for the terminal equipment to perform cell selection or cell reselection.

The communication device provided in the embodiment of the present application may be the terminal device in the above solution or the network device in the above solution, and the communication device includes a processor and a memory. The memory is used for storing computer programs, and the processor is used for invoking and running the computer programs stored in the memory to execute the above wireless communication method.

The chip provided in the embodiment of the present application is used to implement the above wireless communication method.

Specifically, the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the above wireless communication method.

The computer-readable storage medium provided by the embodiment of the present application is used for storing a computer program, and the computer program causes a computer to execute the above wireless communication method.

The computer program product provided by the embodiments of the present application includes computer program instructions, where the computer program instructions cause a computer to execute the above wireless communication method.

The computer program provided by the embodiment of the present application, when running on a computer, enables the computer to execute the above wireless communication method.

Through the above technical solution, the network device sends indication information to the terminal equipment; the indication information is information related to the NTN gateway corresponding to the NTN cell; the indication information is used for the terminal equipment to perform cell selection or cell reselection, so that the terminal equipment Cell selection or cell reselection can be performed based on the indication information, so that the selected camping cell or reselected target cell meets the service requirements of the terminal.

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application. In the attached picture:

FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present application;

FIG. 2 is a schematic structural diagram of another communication system provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of another communication system provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of an NTN scenario based on a transparent forwarding satellite provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of an NTN scenario based on regenerative forwarding satellites provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of an optional NTN system provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of an optional NTN system provided by an embodiment of the present application;

FIG. 8 is a schematic flowchart of an optional wireless communication method provided by an embodiment of the present application;

FIG. 9 is a schematic flowchart of an optional wireless communication method provided by an embodiment of the present application;

FIG. 10 is a schematic flowchart of an optional wireless communication method provided by an embodiment of the present application;

FIG. 11 is a schematic structural diagram of an optional wireless communication device provided by an embodiment of the present application;

FIG. 12 is a schematic structural diagram of an optional wireless communication device provided by an embodiment of the present application;

Fig. 13 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 14 is a schematic structural diagram of a chip according to an embodiment of the present application;

Fig. 15 is a schematic block diagram of a communication system provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present application.

As shown in FIG. 1 , a communication system 100 may include a terminal device 110 and a network device 120 . The network device 120 may communicate with the terminal device 110 through an air interface. Multi-service transmission is supported between the terminal device 110 and the network device 120 .

It should be understood that the embodiment of the present application is only described by using the communication system 100 as an example, but the embodiment of the present application is not limited thereto. That is to say, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (Long Term Evolution, LTE) system, LTE Time Division Duplex (Time Division Duplex, TDD), Universal Mobile Communication System (Universal Mobile Telecommunication System, UMTS), Internet of Things (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.

In the communication system 100 shown in FIG. 1 , the network device 120 may be an access network device that communicates with the terminal device 110 . The access network device can provide communication coverage for a specific geographic area, and can communicate with terminal devices 110 (such as UEs) located in the coverage area.

The network device 120 may be an evolved base station (Evolutional Node B, eNB or eNodeB) in a long-term evolution (Long Term Evolution, LTE) system, or a next-generation radio access network (Next Generation Radio Access Network, NG RAN) device, Either a base station (gNB) in the NR system, or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device 120 can be a relay station, an access point, a vehicle-mounted device, a wearable Devices, hubs, switches, bridges, routers, or network devices in the future evolution of the Public Land Mobile Network (Public Land Mobile Network, PLMN), etc.

The terminal device 110 may be any terminal device, including but not limited to a terminal device connected to the network device 120 or other terminal devices by wire or wirelessly.

For example, the terminal equipment 110 may refer to an access terminal, a user equipment (User Equipment, UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, user agent, or user device. Access terminals can be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, IoT devices, satellite handheld terminals, Wireless Local Loop (WLL) stations, Personal Digital Assistant , PDA), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks or terminal devices in future evolution networks, etc.

The terminal device 110 can be used for device-to-device (Device to Device, D2D) communication.

The wireless communication system 100 may also include a core network device 130 that communicates with the base station. The core network device 130 may be a 5G core network (5G Core, 5GC) device, for example, Access and Mobility Management Function (Access and Mobility Management Function , AMF), and for example, authentication server function (Authentication Server Function, AUSF), and for example, user plane function (User Plane Function, UPF), and for example, session management function (Session Management Function, SMF). Optionally, the core network device 130 may also be a packet core evolution (Evolved Packet Core, EPC) device of the LTE network, for example, a data gateway (Session Management Function+Core Packet Gateway, SMF+PGW- C) Equipment. It should be understood that SMF+PGW-C can realize the functions of SMF and PGW-C at the same time. In the process of network evolution, the above-mentioned core network equipment may be called by other names, or a new network entity may be formed by dividing functions of the core network, which is not limited in this embodiment of the present application.

Various functional units in the communication system 100 may also establish a connection through a next generation network (next generation, NG) interface to implement communication.

For example, the terminal device establishes an air interface connection with the access network device through the Uu interface to transmit user plane data and control plane signaling; the terminal device can establish a control plane signaling connection with the AMF through the NG interface 1 (N1 for short); the access Network equipment such as the next generation wireless access base station (gNB), can establish a user plane data connection with UPF through NG interface 3 (abbreviated as N3); access network equipment can establish control plane signaling with AMF through NG interface 2 (abbreviated as N2) connection; UPF can establish a control plane signaling connection with SMF through NG interface 4 (abbreviated as N4); UPF can exchange user plane data with the data network through NG interface 6 (abbreviated as N6); AMF can communicate with SMF through NG interface 11 (abbreviated as N11) The SMF establishes a control plane signaling connection; the SMF may establish a control plane signaling connection with the PCF through an NG interface 7 (N7 for short).

Figure 1 exemplarily 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 terminals within the coverage area. The device is not limited in the embodiment of this application.

3GPP is studying NTN technology, and NTN generally adopts satellite communication to provide communication services to ground users. Compared with terrestrial cellular network communication, satellite communication has many unique advantages. First of all, satellite communication is not restricted by the user's region. For example, general land communication cannot cover areas such as oceans, mountains, deserts, etc. that cannot be equipped with communication equipment or are not covered by communication due to sparse population. For satellite communication, due to a Satellites can cover a large area of the ground, and satellites can orbit the earth, so theoretically every corner of the earth can be covered by satellite communications. Secondly, satellite communication has great social value. Satellite communication can be covered at a lower cost in remote mountainous areas, poor and backward countries or regions, so that people in these regions can enjoy advanced voice communication and mobile Internet technology, which is conducive to narrowing the digital gap with developed regions and promoting development of these areas. Thirdly, the distance of satellite communication is long, and the cost of communication does not increase significantly with the increase of communication distance; finally, the stability of satellite communication is high, and it is not limited by natural disasters.

NTN technology can be combined with various communication systems. For example, NTN technology can be combined with NR system to form NR-NTN system. For another example, NTN technology can be combined with the Internet of Things (IoT) system to form an IoT-NTN system. As an example, the IoT-NTN system may include a NB-IoT-NTN system and an eMTC-NTN system.

Fig. 2 is a schematic structural diagram of another communication system provided by an embodiment of the present application.

As shown in FIG. 2 , a terminal device 201 and a satellite 202 are included, and wireless communication can be performed between the terminal device 201 and the satellite 202 . The network formed between the terminal device 201 and the satellite 202 may also be referred to as NTN. In the architecture of the communication system shown in FIG. 2 , the satellite 202 may function as a base station, and the terminal device 201 and the satellite 202 may communicate directly. Under the system architecture, the satellite 202 can be called a network device. In some embodiments of the present application, the communication system may include multiple network devices 1102, and the coverage of each network device 1102 may include other numbers of terminal devices, which is not limited in this embodiment of the present application.

Fig. 3 is a schematic structural diagram of another communication system provided by an embodiment of the present application.

As shown in FIG. 3 , it includes a terminal device 201 , a satellite 202 and a base station 203 , wireless communication can be performed between the terminal device 201 and the satellite 202 , and communication can be performed between the satellite 202 and the base station 203 . The network formed among the terminal equipment 201, the satellite 202 and the base station 203 may also be referred to as NTN. In the architecture of the communication system shown in FIG. 3 , the satellite 202 may not have the function of a base station, and the communication between the terminal device 201 and the base station 203 needs to be relayed through the satellite 202 . Under this kind of system architecture, the base station 203 can be called a network device. In some embodiments of the present application, the communication system may include multiple base stations 203, and the coverage of each base station 203 may include other numbers of terminal devices, which is not limited in this embodiment of the present application. The base station 203 may be the network device 120 in FIG. 1 .

It should be understood that the aforementioned satellites 202 include but are not limited to:

Low-Earth Orbit (LEO) satellites, Medium-Earth Orbit (MEO) satellites, Geostationary Earth Orbit (GEO) satellites, High Elliptical Orbit (HEO) satellites, etc. wait. Satellites can use multiple beams to cover the ground. For example, a satellite can form dozens or even hundreds of beams to cover the ground. In other words, a satellite beam can cover a ground area with a diameter of tens to hundreds of kilometers to ensure satellite coverage and improve the system capacity of the entire satellite communication system.

As an example, the altitude of LEO satellites can range from 500 kilometers to 1500 kilometers, and the corresponding orbital period can be about 1.5 hours to 2 hours. The signal propagation delay of single-hop communication between users can generally be less than 20 milliseconds, and the maximum satellite visible time It can be 20 minutes. The signal propagation distance of the LEO satellite is short and the link loss is small, and the requirement for the transmission power of the user terminal is not high. The orbital height of GEO satellites can be 35786km, the rotation period around the earth can be 24 hours, and the signal propagation delay of single-hop communication between users can generally be 250 milliseconds.

In order to ensure satellite coverage and improve the system capacity of the entire satellite communication system, satellites use multiple beams to cover the ground. A satellite can form dozens or even hundreds of beams to cover the ground; a satellite beam can cover tens to hundreds of kilometers in diameter. ground area.

It should be noted that FIG. 1 to FIG. 3 are only illustrations of systems applicable to this application, and of course, the method shown in the embodiment of this application may also be applicable to other systems. Furthermore, the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship. It should also be understood that the "indication" mentioned in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation. It should also be understood that the "correspondence" mentioned in the embodiments of the present application may mean that there is a direct correspondence or an indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated. , configuration and configured relationship. It should also be understood that the "predefined" or "predefined rules" mentioned in the embodiments of this application can be used by pre-saving corresponding codes, tables or other It is implemented by indicating related information, and this application does not limit the specific implementation. For example, pre-defined may refer to defined in the protocol. It should also be understood that in the embodiment of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, it may include the LTE protocol, the NR protocol, and related protocols applied to future communication systems, and this application does not limit this .

Satellites can be divided into two types based on the functions they provide: transparent payload and regenerative payload. For transparent forwarding satellites, it only provides the functions of radio frequency filtering, frequency conversion and amplification, and only provides transparent forwarding of signals without changing the waveform signal it forwards. For regenerative transponder satellites, in addition to providing radio frequency filtering, frequency conversion and amplification functions, it can also provide demodulation/decoding, routing/conversion, coding/modulation functions, which have part or all of the functions of the base station.

In the NTN, one or more gateways (Gateway) can be included for communication between the satellite and the ground, or for communication between the gNB on the satellite and the core network, or for the gNB distribution unit on the satellite (DU) and the ground gNB base station central unit (CU).

Figure 4 and Figure 5 respectively show schematic diagrams of NTN scenarios based on transparent forwarding satellites and regenerative forwarding satellites.

As shown in Figure 4, for the NTN scenario based on transparent forwarding satellites, the communication between the gateway 401 and the satellite 402 is carried out through a feeder link (Feeder link), and the communication between the satellite 402 and the terminal 403 can be carried out through a service link (service link) communication, wherein the gateway 401 is connected to the data network 404. As shown in Figure 5, for the NTN scenario based on regenerative forwarding satellites, the satellite 402 and the satellite 405 communicate through an Inter-Satellite link, and the gateway 401 and the satellite 402 or satellite 405 communicate through a feeder link (Feeder link). link), and the satellite 402 and the terminal 403 can communicate through a service link.

In order to facilitate the understanding of the technical solutions of the embodiments of the present application, the related technologies of the embodiments of the present application are described below. The following related technologies can be combined with the technical solutions of the embodiments of the present application as optional solutions, and all of them belong to the embodiments of the present application. protected range.

Satellite Network Architecture

At present, there are two kinds of satellites considered by 3GPP, one is transparent forwarding (transparent payload), that is, transparent transmission and forwarding satellites, and the other is regenerative forwarding (regenerative payload) satellites. The transparent forwarding satellite only performs the frequency conversion and amplification of the signal, and the satellite is transparent to the signal. The regenerating and forwarding satellite has the function of part or all of the base station, which performs the frequency conversion and amplification of the signal, as well as the functions of demodulation and decoding, conversion and/or routing, coding and modulation.

The transparent forwarding satellite network architecture is shown in Figure 6. The terminal device 610 accesses the 5G CN650 through the NG RAN61, and connects to the data network 660 through the 5G CN650.

The NG-RAN 61 includes a remote radio unit (Remote Radio Unit, RRU) 62 and a next generation base station (Next Generation Node B, gNB) 640, and the remote radio unit 62 includes a satellite 620 and an NTN gateway 630.

The regenerative and forwarding satellite network architecture is shown in Figure 7, NG RAN61 includes a remote wireless unit 62, and the remote wireless unit 62 includes a satellite 620 and an NTN gateway 630, and the feeder link between the satellite 620 and the NTN gateway 630 is based on the satellite radio interface ( Satellite Radio Interface, SRI), the satellite 620 has the functions of some or all base stations.

In the network architecture shown in FIG. 6 and FIG. 7 , the NTN gateway 630 is usually located on the ground, and may also be called a ground gateway.

cell selection

When the UE is turned on or enters the coverage area from a blind area, the UE will search for all the frequencies allowed by the PLMN and select a suitable cell to reside in. This process is called cell selection. The types of cell selection include initial cell selection and cell selection based on stored information. Regardless of the type of cell selection, it is necessary to measure the cell to be selected in order to evaluate the channel quality and judge whether it meets the camping conditions. The cell selection criterion in the cellular network is called the S criterion, and camping is allowed when the S criterion is satisfied.

Cell selection based on stored information: UE has stored information about the carrier frequency, and may also include some cell parameter information, for example, obtained from previously received measurement control information or previously camped on or detected cells . The UE will preferentially select a cell with relevant information, and once a suitable cell appears, the UE will select this cell and camp on it. If the cells in which the relevant information is stored are not suitable, the UE will initiate initial cell selection.

S-Code:

Srxlev>0 and Squal>0

Srxlev＝Q _rxlevmeas –(Q _rxlevmin +Q _{rxlevminoffset} )–P _compensation -Qoffset _temp

Squal＝Q _qualmeas –(Q _qualmin +Q _{qualminoffset} )-Qoffset _temp

Among them, the meaning of each parameter in the S criterion is shown in Table 1.

Table 1. The meaning of each parameter in the S criterion

Cell reselection

Cell reselection refers to the process in which the UE selects the best cell to provide service signals by monitoring the signal quality of neighboring cells and the current cell in idle mode. Cell reselection can be divided into intra-frequency cell reselection and inter-frequency cell reselection. Same-frequency cell reselection can solve wireless coverage problems. Inter-frequency cell reselection can not only solve the problem of wireless coverage, but also achieve load balancing by setting the priority of different frequency points.

In the process of cell reselection, in idle mode or inactive mode, UE detects the signal quality of neighboring cells and the current cell, and combines broadcast messages to select a better cell and camp on it. After the UE successfully camps on the current cell through the cell selection process, it will continue to perform cell measurement on the current cell and decide whether to start neighbor cell measurement. During the neighboring cell measurement process, when the signal quality and level of the neighboring cell meet the S criterion and a certain reselection decision criterion (R criterion), the UE will abandon the current cell and camp on the neighboring cell.

The radio resource control (Radio Resource Control, RRC) layer of the UE calculates Srxlev/Squal (S criterion) according to the RSRP/RSRQ measurement result, and compares it with the same-frequency measurement start RSRP threshold (S _IntraSearchP )/same-frequency measurement start RSRQ threshold ( S _IntraSearchQ ) is compared with the inter-frequency or inter-system measurement start RSRP threshold (S _{nonIntraSearchP} )/inter-frequency or inter-system measurement start RSRQ threshold (S _{nonIntraSearchQ} ) as the judgment condition for whether to start the adjacent cell measurement, whether to start the same-frequency measurement or different The decision process of frequency measurement is shown in Table 2.

Table 2. Example of the decision process of whether to start the same-frequency measurement or different-frequency measurement

If the neighbor cell measurement is same-frequency measurement, the UE compares Srxlev with S _IntraSearchP , and Squal with S _IntraSearchQ . Among them, S _IntraSearchQ and S _IntraSearchP are the same-frequency measurement start thresholds.

If the neighboring cell measurement is inter-frequency or inter-system measurement, the UE compares Srxlev with S _{nonIntraSearchP} , and Squal with S _{nonIntraSearchQ} . Wherein, S _{nonIntraSearchQ} and S _{nonIntraSearchP} are inter-frequency or inter-system measurement start thresholds.

After the UE meets the measurement conditions, the UE performs intra-frequency or inter-frequency measurement on the neighboring cells of the current cell, and obtains a set of candidate cells according to the measurement results. After obtaining the set of cells to be selected, the UE performs reselection conditions according to the different reselection target frequencies shown in Table 3, sorts the set of cells to be selected according to certain criteria (such as the criteria shown in Table 3), and selects the appropriate cell set according to the ranking. community and stay.

Table 3. Examples of reselection target frequencies and reselection conditions

In the process of cell reselection, if multiple cells with different priorities meet the cell reselection criteria at the same time, the high priority frequency or RAT takes precedence over the low priority frequency or RAT. For frequencies with the same frequency or the same priority, the current cell and neighboring cells are sorted according to the R criterion.

R guidelines:

Current serving cell: Rs=Qmeas,s+Qhyst-Qoffset _temp

Neighboring cell: Rn=Qmeas,n-Qoffset–Qoffset _temp

The meaning of each parameter in the formula of R criterion is shown in Table 4.

Table 4. The meaning of each parameter in the formula of R criterion

If the Rn of the neighboring cell exceeds the Rs of the current serving cell, the neighboring cell is regarded as a candidate cell. After the UE sorts the current cell and neighbor cells according to the R criterion to obtain a set of candidate cells, it further selects the cell to camp on through the optimal cell range (rangeToBestCell), that is, selects the cell within the rangeToBestCell range that differs from the R value of the cell with the best signal quality. Among all the candidate cells, the cell with the most beams satisfying the threshold absThreshSS-BlocksConsolidation is selected as the target cell, where absThreshSS-BlocksConsolidation is configured with a threshold for combining L1 measurements of each reference signal index.

In a satellite network, for a satellite that supports the regenerative forwarding architecture of the Inter-Satellite Link (ISL), due to the introduction of the Inter-Satellite Link, the satellite (gNB-DU or gNB) may pass through one or more hops The inter-satellite link is connected to a ground station that is far away, resulting in a relatively large delay between the UE accessing the satellite NTN cell and the data network, so some UEs that require services with time delay are not suitable for accessing the satellite. When the UE performs cell selection and reselection, if the UE does not know the ground station location information/backhaul link delay information of the satellite (gNB-DU or gNB), but only relies on the RSRP/RSRQ or distance between the UE and the satellite If the satellite access is selected based on relevant information, the cell that the UE accesses will not be the optimal choice.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific examples. As optional solutions, the above related technologies may be combined with the technical solutions of the embodiments of the present application in any combination, and all of them belong to the protection scope of the embodiments of the present application. The embodiment of the present application includes at least part of the following contents.

The wireless communication method provided in the embodiment of the present application, as shown in FIG. 8, is applied to a terminal device, including:

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

The terminal device can receive one or more pieces of indication information sent by the network equipment, one indication information corresponds to one NTN cell, and the indication information corresponding to one NTN cell is the information related to the NTN gateway connected to the satellite covering the 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 is satellite 2, the NTN gateway connected to satellite 1 is NTN gateway 1, and the NTN gateway connected to satellite 2 is the NTN gateway 2, the indication information corresponding to the NTN cell 1 is information related to the NTN gateway 1, and the indication information corresponding to the NTN cell 2 is information related to the NTN gateway 2.

Optionally, the indication information indicates the time delay between the terminal device and the NTN gateway corresponding to the NTN cell when accessing the NTN cell.

In an example, NTN cell 1 corresponds to NTN gateway 1, and NTN cell 2 corresponds to NTN gateway 2, then the indication information corresponding to NTN cell 1 indicates the time delay between the terminal device accessing NTN cell 1 and NTN gateway 1, The indication information corresponding to the NTN cell 1 indicates the time delay between the terminal device and the NTN gateway 2 when it accesses the NTN cell 2 .

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

After receiving the indication information, the terminal device at least performs cell selection or cell reselection according to the received indication information.

When the terminal device does not access the network, the terminal device performs cell selection based on the indication information of each NTN cell in one or more NTN cells not accessed, so as to determine the cell to camp on.

When the terminal device accesses the network, the terminal device 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, so as to determine the target cell.

In the embodiment of the present application, the network device may send the indication information of each NTN cell among multiple NTN cells to the terminal device, and the terminal device selects a candidate NTN cell from the NTN cells corresponding to the indication information sent by the network device, and based on the candidate NTN cell correspondence Instruction information for cell selection or cell reselection.

In an example, the network device sends the following indication information corresponding to the NTN cell to the terminal device, NTN cell 1, NTN cell 2, and NTN cell 3, and the terminal device searches NTN cell 1 and NTN cell without accessing the network 2, the terminal device takes NTN cell 1 and NTN cell 2 as candidate NTN cells, and performs cell selection based on the indication information corresponding to NTN cell 1 and the indication information corresponding to NTN cell 2.

In an example, the network device sends the following indication information corresponding to the NTN cell to the terminal device, NTN cell 1, NTN cell 2, and NTN cell 3, wherein, 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 takes NTN cell 1 and NTN cell 3 as candidate NTN cells, and performs cell reselection based on the indication information corresponding to NTN cell 1 and the indication information corresponding to NTN cell 3.

Optionally, the network device broadcasts indication information of different NTN cells, and 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 .

The wireless communication method provided in the embodiment of the present application, as shown in FIG. 9 , is applied to a network device, including:

S901. The network device sends instruction information to the terminal device, where the instruction information is information related to the NTN gateway corresponding to the NTN cell, and the instruction information is used for the terminal device to perform cell selection or cell reselection.

The network device sends one or more pieces of indication information to the terminal equipment within the coverage area, one indication information corresponds to one NTN cell, and the indication information corresponding to one NTN cell is information related to the NTN gateway connected to the satellite covering the 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 is satellite 2, the NTN gateway connected to satellite 1 is NTN gateway 1, and the NTN gateway connected to satellite 2 is the NTN gateway 2, the indication information corresponding to the NTN cell 1 is information related to the NTN gateway 1, and the indication information corresponding to the NTN cell 2 is information related to the NTN gateway 2.

When the terminal device is not connected to the network, the indication information sent by the network device to the terminal device is used for cell selection. The NTN cell corresponding to the cell selection instruction information of the terminal device is the NTN cell indicated by the information stored in the terminal device or the NTN cell searched by the terminal device through cell search. Wherein, the stored information may include carrier frequency, cell identity and other information capable of identifying an NTN cell.

When the terminal device accesses the network, the indication information sent by the network device to the terminal device is used for cell reselection. The NTN cell corresponding to the cell reselection instruction information of the terminal device includes the current serving cell, that is, the currently accessed NTN cell and neighboring cells of the serving cell.

The wireless communication method provided in the embodiment of the present application, as shown in FIG. 10 , is applied to a wireless communication system including a terminal device and a network device, including:

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

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

Here, the execution of the terminal device may refer to the description of the terminal device in the wireless communication method shown in FIG. 8 , and the execution of the network device may refer to the description of the network device in the wireless communication method shown in FIG.

In the embodiment of the present application, the network device sends indication information to the terminal equipment, and the indication information is not related to the NTN gateway corresponding to the terrestrial network communication NTN cell; the indication information is used for the terminal equipment to perform cell selection or cell reselection , so that the terminal device can perform cell selection or cell reselection based on the indication information, so that the selected camping cell or reselected target cell meets the service requirements of the terminal device.

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

Information A, the location information of the NTN gateway;

Information B, the hop count of the inter-satellite link between the satellite covering the NTN cell and the NTN gateway;

Information C, delay information between satellites covering the NTN cell and the NTN gateway;

Information D, the delay level between the satellite covering the NTN cell and the NTN gateway;

Information E, the distance between the satellite covering the NTN cell and the NTN gateway.

In an example, the indication information includes: the location of the NTN gateway.

In an example, the indication information includes: the hop count of the inter-satellite link between the satellite covering the NTN cell and the NTN gateway.

In an example, the indication information includes: the location of the NTN gateway and the delay information from the satellite covering the NTN cell to the NTN gateway.

In an example, the indication information includes the hop count 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.

The location information of the NTN gateway may be a geographic location represented by latitude and longitude, or may be an area identifier identifying a geographic area. Optionally, the granularity of the location information of the NTN gateway may be greater than a granularity threshold, and the granularity threshold may be 2 kilometers (km).

For one or more of the hop count, delay information, delay level and distance of the inter-satellite link between the satellite covering the NTN cell and the NTN gateway, it can reflect the satellite covering the NTN cell and Delay between NTN gateways.

In the embodiment of the present 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.

For the delay level, it may be the quantization result of the delay information. Different latency levels correspond to different latency ranges.

In some embodiments, when the terminal device does not access an NTN cell, the terminal device performs cell selection based on indication information corresponding to at least one first NTN cell to determine a cell to camp on, and the first NTN cell The cell is an NTN cell not accessed by the terminal device.

At this time, the cell selected by the cell to reside on is determined based on indication information corresponding to at least one first NTN cell, where the first NTN cell is an NTN cell not accessed by the terminal device.

Here, in a cell selection scenario, the NTN cell for cell selection is referred to as a first NTN cell, and the first NTN cell is an NTN cell to be selected when a terminal device initially accesses.

Optionally, the first NTN cell is an NTN cell indicated by stored information in the terminal device, and the stored information may include carrier frequency, cell identity and other information.

Optionally, the first NTN cell is an NTN cell found in cell search.

When the information stored in the terminal device indicates a first NTN cell or a first NTN cell is found, the terminal device judges whether the current first NTN cell is a cell to reside on, and if so, accesses the current first NTN cell.

When the information stored in the terminal device indicates multiple first NTN cells or multiple first NTN cells are searched, the terminal device selects a cell to camp on from among the multiple first NTN cells, and accesses the selected cell to camp on.

In some embodiments, the criteria for the terminal device to select a cell include:

A first criterion, where the first criterion is a criterion for cell selection based on signal quality;

A second criterion, where the second criterion is a criterion for cell selection based on the indication information;

The priority of the first criterion is higher than the priority of the second criterion.

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

A second criterion, where the second criterion is a criterion for performing cell selection based on the indication information; the priority of the first criterion is higher than that of the second criterion.

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

In an example, the first criterion is the S criterion.

In the embodiment of the present application, when the terminal device determines that a first NTN cell satisfies the first criterion and satisfies the second criterion, the first NTN cell is used as a camping cell.

Taking the candidate cell including a first NTN cell as an example, the terminal device judges whether the first NTN cell satisfies the first criterion and the second criterion, and if the first criterion and the second criterion are satisfied, the NTN cell is used as the cell to camp on.

Taking the candidate cell including multiple first NTN cells as an example, the terminal device determines a first candidate NTN cell among the multiple first NTN cells, wherein the first candidate NTN cell is a first NTN cell that satisfies the first criterion, and determines Whether the first candidate NTN cell satisfies the second criterion, and determine the first candidate NTN cell satisfying the second criterion as the camping cell.

In this embodiment of the application, the terminal device judges whether an NTN cell satisfies the first criterion, and when the first NTN cell satisfies the first criterion, then determines the first NTN cell as the first candidate NTN cell, and then judges whether the first NTN cell satisfies the first criterion. Whether the cell satisfies the second criterion, and if so, the first NTN cell is used as the cell to reside on. Alternatively, the terminal device determines at least one first candidate NTN cell satisfying the first criterion from the plurality of first NTN cells, and determines a camping cell satisfying the second criterion from the at least one first candidate NTN cell.

In an example, when the terminal device does not access the NTN cell, it judges whether the NTN cell 1 satisfies the first criterion, and if it satisfies the first criterion, it continues to judge whether the NTN cell 1 satisfies the second criterion. The second criterion is to determine that NTN cell 1 is the cell to reside on, and the terminal device accesses NTN cell 1; otherwise, continue to determine whether other NTN cells can be used as the cell to reside on.

In an example, the terminal device judges whether NTN cell 1, NTN cell 2, and NTN cell 3 satisfy the first criterion when it does not access the NTN cell, and if NTN cell 1 and NTN cell 2 satisfy the first criterion, the NTN cell 1 and NTN cell 2 continue to judge whether NTN cell 1 and NTN cell 2 meet the second criterion as the first candidate NTN cell, and if NTN cell 1 meets the second criterion, then determine that NTN cell 1 is a resident cell, and the terminal device connects Enter NTN cell 1, if NTN cell 2 satisfies the second criterion, then determine NTN cell 2 as the cell to camp on, and the terminal device accesses NTN cell 2.

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

Condition 1A, the first distance corresponding to the resident cell is less than the first distance threshold, the first distance corresponding to the resident cell is determined based on the location information of the NTN gateway corresponding to the resident cell, and the resident cell corresponds to The first distance is the distance between the satellite covering the resident cell and the NTN gateway;

Condition 1B, the hop count of the inter-satellite link corresponding to the camped cell is less than the first hop count threshold;

Condition 1C, the delay information corresponding to the camped cell is less than a first delay threshold;

Condition 1D, the delay corresponding to the delay level corresponding to the camping cell is less than the delay corresponding to the set first delay level;

Condition 1E, the distance corresponding to the camped cell is smaller than the second distance threshold.

When the indication information includes information A, the second criterion may include condition 1A; when the indication information includes information B, then 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 For information D, the second criterion may include condition 1D; when the indicated information includes information E, the second criterion may include condition 1E.

The second criterion may include one or more of Condition 1A, Condition 1B, Condition 1C, Condition 1D, and Condition 1E.

In one example, the second criterion includes condition 1A. For a first candidate NTN cell, the terminal device determines the first distance between the NTN gateway and the terminal device based on the position of the NTN gateway and the position of the terminal device. If the first distance is less than In the case of the first distance threshold, it is determined that the first candidate NTN cell satisfies the second criterion, and at this time, the first candidate NTN cell is a camping cell.

In an example, the second criterion includes condition 1A and condition 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 position of the NTN gateway and the position of the terminal device. A distance is less than the first distance threshold and the time delay corresponding to the delay class corresponding to the first candidate NTN cell is less than the time delay corresponding to the first delay class, then it is determined that the first candidate NTN cell satisfies the second criterion, and at this time, the first A candidate NTN cell is the camping cell.

Condition 2A, the resident 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 cell; 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;

Condition 2B, the camped 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;

Condition 2C, the camping cell is the first candidate NTN cell with the smallest corresponding delay information among the at least two first candidate NTN cells;

Condition 2D, the camping cell is the first candidate NTN cell with the smallest delay corresponding to the corresponding delay level among the at least two first candidate NTN cells;

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

When the indication information includes information A, the second criterion may include condition 2A; when the indication information includes information B, the second criterion may include condition 2B; when the indication information includes information C, the second criterion may include condition 2C; when the indication information includes For information D, the second criterion may include condition 2D; when the indicated information includes information E, the second criterion may include condition 2E.

The second criterion may include one or more of Condition 2A, Condition 2B, Condition 2C, Condition 2D, and Condition 2E.

In an example, the second criterion includes condition 2B. For a first candidate NTN cell, the terminal device determines that the hop count of the inter-satellite link corresponding to the first candidate NTN cell is less than that of the inter-satellite links corresponding to other first candidate NTN cells The number of hops of the road, that is, the number of hops corresponding to the first candidate NTN sub-district is the smallest among the hops corresponding to all first candidate NTN sub-districts, then it is determined that the first candidate NTN sub-district satisfies the second criterion. At this time, the first candidate NTN sub-district An NTN cell may be a camping cell.

In an example, the second criterion includes condition 2B and condition 2C, the terminal device determines the first distance of each first candidate NTN cell based on the positions of the NTN gateways corresponding to the multiple first candidate NTN cells and the position of the terminal device, and determines The delay information corresponding to each first candidate NTN cell, when the first distance corresponding to a first candidate NTN cell is minimum and the delay represented by the corresponding delay information is minimum, then it is determined that the first candidate NTN cell satisfies the second criterion, At this time, the first candidate NTN cell is the camping cell.

In practical applications, the second criterion for the terminal device to determine the cell to camp on 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.

In some embodiments, when the terminal device accesses a 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.

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, so The third NTN cell is a neighboring cell of the second NTN cell.

In the case of a terminal device accessing an NTN cell, the NTN cell currently accessed by the terminal device is called a second NTN cell, and the adjacent cell of the second NTN cell is called a third NTN cell, and the terminal device includes the second NTN cell Cell reselection is performed between the cell and at least one third NTN cell, and the reselected cell is used as a target cell.

When the target cell is the second NTN cell, the terminal device does not perform NTN cell handover, and continues to reside in the current second NTN cell. When the target cell is not the second NTN cell, the terminal device performs cell switching, switching from the current second NTN cell to the target cell.

Optionally, the second NTN cell and the third NTN cell are inter-frequency cells with the same frequency or the same priority.

In some embodiments, the criteria for cell reselection include:

A third criterion, the third criterion is a criterion for performing cell reselection based on signal quality;

A fourth criterion, where the fourth criterion is a criterion for performing cell reselection based on the indication information;

The priority of the third criterion is higher than the priority of the fourth criterion.

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

In an example, the third criterion is the R criterion.

In this embodiment of the application, the criteria for terminal equipment to perform cell reselection, that is, the criteria for determining the target cell may only include the third criterion and the fourth criterion, and may also include criteria other than the third and fourth criteria, such as: the fifth criterion , where the fifth criterion is a beam-based criterion.

In the case that the cell reselection criteria for the terminal device only include the third criterion and the fourth criterion, the terminal device determines the NTN cell satisfying the third criterion and the fourth criterion as the target cell.

Taking the cell reselection criteria of the terminal device only including the third criterion and the fourth criterion as an example, for multiple NTN cells, the terminal device determines the NTN cell that satisfies the third criterion among the multiple NTN cells, that is, the second candidate NTN cell, and Determining a second candidate NTN cell that satisfies the fourth criterion among the second candidate NTN cells as the target cell. Here, the second candidate NTN cell is an NTN cell satisfying the third criterion, and the second candidate NTN cell satisfying the fourth criterion is the target cell.

In an example, when the terminal device accesses NTN cell 1, for the neighbor cell of NTN cell 1: NTN cell 2, judge whether NTN cell 2 satisfies the third criterion, and if it meets the third criterion, continue to judge the NTN cell 2 Whether the fourth criterion is satisfied, if NTN cell 2 meets the fourth criterion, then determine 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.

In an example, when the terminal device accesses NTN cell 1, for NTN cell 1 and the neighbor cells of NTN cell 1: NTN cell 2 and NTN cell 3, the terminal device judges that NTN cell 1, NTN cell 2 and NTN cell 3 whether the third criterion is satisfied, if NTN cell 1 and NTN cell 2 meet the third criterion, then continue to judge whether NTN cell 1 and NTN cell 2 satisfy the fourth criterion with NTN cell 1 and NTN cell 2 as the second candidate NTN cell, If NTN cell 1 meets the fourth criterion, then determine NTN cell 1 as the target cell, and the terminal device continues to camp on NTN cell 1, if NTN cell 1 does not meet the fourth criterion, and NTN cell 2 meets the fourth criterion, then determine the NTN cell 2 is the target cell, and the terminal equipment is handed over from NTN cell 1 to NTN cell 2.

When the cell reselection criteria for the terminal device include the third criterion, the fourth criterion and the fifth criterion, the terminal device determines the NTN cell satisfying the third criterion, the fourth criterion and the fifth criterion as the target cell.

In an example, for a plurality of NTN cells, the terminal device determines a candidate NTN cell that satisfies the third criterion among the plurality of candidate NTN cells, that is, a second candidate NTN cell, and determines a second candidate NTN cell that meets the fourth criterion among the second candidate NTN cells. candidate NTN cells, and determine the second candidate NTN cells satisfying the fifth criterion among the second candidate NTN cells satisfying the fourth criterion as target cells.

In an example, the terminal device determines a candidate NTN cell that satisfies the third criterion and a fifth criterion among the plurality of candidate NTN cells, that is, a second candidate NTN cell, and determines a second candidate NTN cell that satisfies the fourth criterion among the second candidate NTN cells The cell is the target cell.

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

Condition 3A, the second distance corresponding to the target cell is less than a 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, and the second distance corresponding to the target cell is The distance between the satellite covering the target cell and the NTN gateway;

Condition 3B, the hop count of the inter-satellite link corresponding to the target cell is less than a second hop count threshold;

Condition 3C, the delay information corresponding to the target cell is less than a second delay threshold;

Condition 3D, the delay corresponding to the delay class corresponding to the target cell is less than the delay corresponding to the set second delay class;

Condition 3E, the distance corresponding to the target cell is less than a fourth distance threshold.

When the indication information includes information A, the fourth criterion may include condition 3A; when the indication information includes information B, the fourth criterion may include condition 13B; when the indication information includes information C, the fourth criterion may include condition 3C; when the indication information includes information D. The fourth criterion may include condition 3D; when the indication information includes information E, the fourth criterion may include condition 3E.

The fourth criterion may include one or more of Condition 3A, Condition 3B, Condition 3C, Condition 3D, and Condition 3E.

In one example, the fourth criterion includes condition 3A. For a second candidate NTN cell, the terminal device determines the second distance between the NTN gateway and the terminal device based on the position of the NTN gateway and the position of the terminal device. When the first distance is less than In the case of the third distance threshold, it is determined that the second candidate NTN cell satisfies the fourth criterion.

In an example, the fourth criterion includes condition 3A and condition 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 position of the NTN gateway and the position of the terminal device. If the second distance is less than the third distance threshold and the delay corresponding to the delay class corresponding to the second candidate NTN cell is smaller than the delay corresponding to the second delay class, then it is determined that the second candidate NTN cell satisfies the fourth criterion.

In this embodiment of the present application, the first distance threshold and the second distance threshold may be the same or different. In this embodiment of the present application, no limitation is imposed on the sizes of the first distance threshold and the second distance threshold.

In this embodiment of the present application, the first delay threshold and the second delay threshold may be the same or different. In this embodiment of the present application, no limitation is imposed on the sizes of the first delay threshold and the second delay threshold.

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, and the second candidate NTN cell is the second NTN cell that at least satisfies the third criterion A cell or a third NTN cell; the second distance is determined based on the location information of the NTN gateway, and the second distance is the distance between the satellite covering the second candidate NTN cell and the NTN gateway;

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;

Condition 4C, the target cell is the second candidate NTN cell with the smallest delay information among the at least two second candidate NTN cells;

Condition 4D, the target cell is the second candidate NTN cell with the smallest delay corresponding to the corresponding delay level among the at least two second candidate NTN cells;

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.

When the indication information includes information A, the fourth criterion may include condition 4A; when the indication information includes information B, then 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 For information D, the fourth criterion may include condition 4D; when the indicated information includes information E, the fourth criterion may include condition 4E.

The fourth criterion may include one or more of Condition 4A, Condition 4B, Condition 4C, Condition 4D, and Condition 4E.

In an example, the fourth criterion includes condition 4B. For a second candidate NTN cell, the terminal device determines that the hop count of the inter-satellite link corresponding to the second candidate NTN cell is smaller than that of the inter-satellite links corresponding to other second candidate NTN cells The number of hops of the road, that is, the number of hops corresponding to the second candidate NTN cell is the smallest among the number of hops corresponding to all second candidate NTN cells, then it is determined that the second candidate NTN cell satisfies the fourth criterion.

In an example, the fourth criterion includes condition 4B and condition 4C, the terminal device determines the second distance of each second candidate NTN cell based on the positions of the NTN gateways corresponding to the plurality of second candidate NTN cells and the position of the terminal device, and determines Delay information corresponding to each second candidate NTN cell, when the second distance corresponding to a second candidate NTN cell is the smallest and the delay represented by the corresponding delay information is the smallest, then it is determined that the second candidate NTN cell satisfies the fourth criterion.

In practical applications, the fourth criterion for the terminal device 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.

In the embodiment of this application, when the terminal device determines the target cell based on the third criterion and the fourth criterion, the second candidate NTN cell in the above-mentioned condition 4A, condition 4B, condition 4C, condition 4D and condition 4E is one that satisfies the third Guidelines for NTN Cells.

In some embodiments, the cell reselection criterion further includes: a fifth criterion, where the fifth criterion is a beam-based criterion.

In one example, the fifth criterion is that the beams satisfying the threshold absThreshSS-BlocksConsolidation are at most

In some embodiments, said fourth criterion has a higher priority than said fifth criterion; or,

Taking the priority of the fourth criterion higher than the priority of the fifth criterion as an example, the terminal device first performs the judgment of the fourth criterion, and then performs the judgment of the fifth criterion.

At this time, the second candidate NTN cell is an NTN cell satisfying the third criterion. If the second candidate NTN cell satisfies the fourth criterion, the terminal device continues to judge whether the second candidate NTN cell satisfies the fifth criterion. When two candidate NTN cells meet the fifth criterion, determine the second candidate NTN cell as the target cell; or determine a second candidate NTN cell that satisfies the fourth criterion from multiple second candidate NTN cells, and will satisfy the second candidate NTN cell. Among the second candidate NTN cells of the four criteria, the second candidate NTN cell satisfying the fifth criterion is determined as the target cell.

In an example, when the terminal device accesses NTN cell 1, for the neighbor cell of NTN cell 1: NTN cell 2, judge whether NTN cell 2 satisfies the third criterion, and if it meets the third criterion, continue to judge the NTN cell 2 whether the fourth criterion is satisfied, if the NTN cell 2 meets the fourth criterion, continue to judge whether the NTN cell meets the fifth criterion, if the NTN cell 2 meets the fifth criterion, then determine that the NTN cell 2 is the target cell, and the terminal equipment starts from the NTN cell 1 is handed over to NTN cell 2. If NTN cell 2 does not meet the fifth criterion, the terminal device continues to camp on NTN cell 1.

In an example, when the terminal device accesses NTN cell 1, for NTN cell 1 and the neighbor cells of NTN cell 1: NTN cell 2 and NTN cell 3, the terminal device judges that NTN cell 1, NTN cell 2 and NTN cell 3 whether the third criterion is satisfied, if NTN cell 1 and NTN cell 2 meet the third criterion, then continue to judge whether NTN cell 1 and NTN cell 2 satisfy the fourth criterion with NTN cell 1 and NTN cell 2 as the second candidate NTN cell, If NTN cell 1 and NTN cell 2 meet the fourth criterion, continue to judge whether NTN cell 1 and NTN2 cell meet the fifth criterion, if NTN cell 1 meets the fifth criterion, then determine NTN cell 1 as the target cell, and the terminal device continues to camp Staying in NTN cell 1, if NTN cell 2 satisfies the fifth criterion, NTN cell 2 is determined to be the target cell, and the terminal equipment is handed over from NTN cell 1 to NTN cell 2.

Taking the priority of the fourth criterion lower than the priority of the fifth criterion as an example, the terminal device first performs the judgment of the fifth criterion, and then performs the judgment of the fourth criterion. At this time, the second candidate NTN cell is an NTN cell satisfying the third criterion and the fifth criterion, and if the second candidate NTN cell satisfies the fourth criterion, the second candidate NTN cell is determined as the target cell; or multiple The second candidate NTN cell determined to satisfy the fourth criterion among the second candidate NTN cells is determined as the target cell.

In an example, when the terminal device accesses NTN cell 1, for the neighbor cell of NTN cell 1: NTN cell 2, judge whether NTN cell 2 satisfies the third criterion, and if it meets the third criterion, continue to judge the NTN cell 2 whether the fifth criterion is satisfied, if the NTN cell 2 meets the fifth criterion, then continue to judge whether the NTN cell satisfies the fourth criterion, if the NTN cell 2 meets the fourth criterion, then determine that the NTN cell 2 is the target cell, and the terminal equipment starts from the NTN cell 1 is handed over to NTN cell 2. If NTN cell 2 does not satisfy the fourth criterion, the terminal device continues to camp on NTN cell 1.

In an example, when the terminal device accesses NTN cell 1, for NTN cell 1 and the neighbor cells of NTN cell 1: NTN cell 2 and NTN cell 3, the terminal device judges that NTN cell 1, NTN cell 2 and NTN cell 3 Whether the third criterion and the fifth criterion are satisfied, if NTN cell 1 and NTN cell 2 meet the third criterion and the fifth criterion, then use NTN cell 1 and NTN cell 2 as the second candidate NTN cell and continue to judge NTN cell 1 and whether NTN cell 2 satisfies the fourth criterion, if NTN cell 1 satisfies the fourth criterion, then determine that NTN cell 1 is the target cell, and the terminal equipment continues to reside in NTN cell 1, if NTN cell 2 meets the fourth criterion, then determine NTN cell 1 Cell 2 is the target cell, and the terminal equipment is handed over from NTN cell 1 to NTN cell 2.

Taking the priority of the fourth criterion lower than the priority of the fifth criterion as an example, when the fourth criterion includes at least one of the following conditions, the second candidate NTN cell must satisfy the third criterion and the fifth criterion Guidelines for the second NTN cell or the third NTN cell:

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, and the second The distance is the distance between the satellite covering the second candidate NTN cell and the NTN gateway;

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;

Condition 5C, the target cell is the second candidate NTN cell with the smallest delay information among the at least two second candidate NTN cells;

Condition 5D, the target cell is the second candidate NTN cell with the smallest delay corresponding to the corresponding delay level among the at least two second candidate NTN cells;

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.

In the embodiment of this application, when the terminal device performs cell reselection based on the third criterion and the fourth criterion, or performs cell reselection based on the third criterion, the fourth criterion, and the fifth criterion, and the priority of the fourth criterion is higher than that of the first criterion Five criteria, when the fourth criterion includes any condition in condition 4A, condition 4B, condition 4C and condition 4D, the second candidate NTN cell in condition 4A, condition 4B, condition 4C and condition 4D is to meet the third criterion NTN cell, and the terminal device determines that the second candidate NTN cell that satisfies the fourth criterion and the fifth criterion is the target cell. When the terminal device performs cell reselection based on the third criterion, the fourth criterion and the fifth criterion, and the priority of the fourth criterion is lower than the fifth criterion, in the fourth criterion including condition 4A, condition 4B, condition 4C and condition 4D In the case of any condition, the second candidate NTN cell in Condition 4A, Condition 4B, Condition 4C and Condition 4D is an NTN cell that satisfies the third criterion and the fifth criterion, namely Condition 4A, Condition 4B, Condition 4C and Condition 4D It is adjusted to the corresponding condition 5A, condition 5B, condition 5C and condition 5D. At this time, the terminal device determines that the second candidate NTN cell satisfying the fourth criterion is the target cell.

In the embodiment of the present application, in the process of cell reselection, there is no limitation on the priorities of the third criterion, the fourth criterion and the fifth criterion.

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

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

Scenario 1. Cell selection;

Scenario 2: Cell reselection.

In scenario 1, the terminal device receives the indication information sent by the network device, and the indication information is information related to the NTN gateway corresponding to the NTN cell. The terminal device selects a cell to camp on based on the first criterion and the second criterion. Wherein, the second criterion is a criterion for performing cell selection based on indication information.

In an example, the network device sends the 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 stored information of the terminal device indicates NTN cell 1, and the terminal device based on NTN cell The indication information corresponding to 1 determines whether NTN cell 1 can be used as a resident cell. When NTN cell 1 can be used as a resident cell, access to NTN cell 1; otherwise, based on the NTN cell 2, NTN cell 3, and NTN cell 4 The instruction information corresponding to the cell selects the cell to camp on among the searched NTN cell 2, NTN cell 3, and NTN cell 4.

In scenario 2, the terminal device receives the indication information sent by the network device, and the indication information is information 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:

Criterion Set 1, Third Criterion and Fourth Criterion;

Criterion Set 2, Third Criterion, Fourth Criterion, and Fifth Criterion.

In an example, the NTN cell accessed by the terminal device is NTN cell 5, and the network device sends the indication information corresponding to each NTN cell in NTN cell 5, NTN cell 6, NTN cell 7, and NTN cell 8 to the terminal device, wherein NTN cell Cell 6, NTN cell 7, and NTN cell 8 are adjacent cells of NTN cell 5, and the terminal device determines the target cell based on the indication information corresponding to each NTN cell in NTN cell 5, NTN cell 6, NTN cell 7, and NTN cell 8. When the target cell is NTN cell 5, the terminal device does not perform NTN cell switching; when the target cell is NTN cell 6, the terminal device switches from NTN cell 5 to NTN cell 6.

Optionally, the instruction information includes at least one of the following:

The location of the NTN gateway;

The hop count of the inter-satellite link between the satellite covering the NTN cell and the NTN gateway;

Delay information between satellites covering NTN cells and NTN gateways;

The delay level between the satellite covering the NTN cell and the NTN gateway;

The distance between the satellite covering the NTN cell and the NTN gateway.

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

The network device broadcasts the system information carrying the instruction information, and the terminal device monitors the system information broadcast by the network device, and if it detects the system information carrying the instruction information, it analyzes the system information to obtain the instruction information.

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

Master Information Block (Master Information Block, MIB), System Information Block (System Information Block) SIB.

Here, the SIB can be SB1 or SIB x, where x is greater than 1. Among them, SIB x is the collective name of system information blocks such as SIB2, SIB3, SIB4, etc.

Optionally, indication information corresponding to different NTN cells may be carried in different system information.

In an example, the indication information corresponding to the NTN cell 1 is carried on the MIB, and the indication information corresponding to the NTN cell 2 is carried on the SIB.

In an 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.

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 in different system information.

In an example, the indication information corresponding to the NTN cell is carried on the MIB when the terminal device is not connected to the network, and the indication information corresponding to the NTN cell is carried on the SIB when the terminal device has connected to the network.

In an example, when the terminal device is not connected to the network, the indication information corresponding to the NTN cell is carried on the SIB2, and when the terminal device has accessed the network, the indication information corresponding to the NTN cell is carried on the SIB5.

In the following, the wireless communication method provided by the embodiment of the present application will be described through scenarios of cell selection and cell reselection.

The idle state or inactive state UE receives the system message broadcast by the satellite (gNB-DU or gNB), including the information of the current NTN cell or NTN neighbor cell. When the system message indicates the location information of the satellite ground station and/or the number of hops of the inter-satellite link and/or the delay (or distance) from the satellite to the satellite ground station; when UE cell selection or cell reselection, according to the above information, select Appropriate NTN cell access.

The implementation process is as follows:

1. The UE in the idle state or the inactive state receives the system information of the current NTN cell, which is broadcast by satellite (gNB-DU or gNB), and contains one or more of the following information:

The location information of the satellite ground station of the current NTN cell: optionally, for security reasons, it can be a rough location (such as granularity>2km), geographical area;

The hop count of the current NTN cell inter-satellite link;

The time delay (or distance) from the satellite of the current NTN cell to the satellite ground station: optionally, in order to reduce the occupation signaling overhead, this information can use different time delay levels after quantization;

The information of one or more neighboring cells of the current NTN cell may include one or more of the following:

Location information of satellite ground stations in NTN neighboring areas;

The hop count of the NTN neighboring inter-satellite link;

The distance or time delay from the NTN neighbor satellite to the satellite ground station.

2. The system information may be MIB, SIB1, SIBx, etc., and may be carried by different system information.

3. When the UE performs cell selection and reselection, the UE can select a suitable cell for access according to the above information broadcast by the current NTN cell, for example:

a) Among the cells satisfying the cell selection and reselection criteria based on RSRP/RSRQ, the UE preferentially selects the cell with the closest distance to the satellite ground station for access according to the above information broadcast by the base station;

Specific embodiments for UE to perform cell selection/reselection include:

Embodiment one

Cell selection based on the location of the ground station

The system message broadcast by the current NTN cell includes the position information of the satellite ground station of the current NTN cell; according to the information, perform cell selection:

- If the current cell satisfies the S criterion, and the distance between the UE position (obtained by the UE's GNSS) and the satellite ground station position of the current NTN cell is less than or equal to the corresponding threshold, then determine that the cell is a resident cell;

- Otherwise, it is determined that the cell is a non-resident cell, that is, the cell is abandoned.

or

- The UE selects the NTN cell that satisfies the S criterion and has the smallest distance as the camping cell.

Embodiment two

Cell selection based on the time delay from satellite to ground station

The system message broadcast by the current NTN cell includes the hop number of the inter-satellite link of the current NTN cell or the time delay (or distance) from the satellite to the satellite ground station; according to the information, perform cell selection:

- If the current cell satisfies the S criterion, and the information is less than or equal to the corresponding threshold, then determine that the cell is a cell to reside on;

or

- The UE selects the NTN cell that satisfies the S criterion and has the smallest information as the cell to reside on.

Embodiment three

Cell reselection based on the location information of the ground station

The system message broadcast by the current NTN cell includes the position information of the satellite ground station of the current NTN cell or NTN neighboring cell; according to the information, perform cell reselection:

- Reselection for same-frequency and same-priority different-frequency cells:

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

-Control the candidate cell through rangeToBestCell, that is: among all candidate cells within the rangeToBestCell range with the best cell signal quality difference, select the UE position (obtained by UE's GNSS) and the satellite ground station position of the candidate cell with the smallest distance The candidate cell is the target cell. Optionally, it can also be combined with the existing condition "the cell with the most beams meeting the threshold", and the priorities of the two conditions can be configured by the network.

Embodiment four

Cell reselection based on the delay from the satellite to the ground station

The system message broadcast by the current NTN cell includes the hop number of the current NTN cell or the inter-satellite link of the NTN neighbor cell or the time delay (or distance) from the satellite to the satellite ground station; according to the information, perform cell reselection:

- Reselection for same-frequency and same-priority different-frequency cells:

- Control the candidate cell through rangeToBestCell, that is, select the candidate cell with the smallest information as the target cell among all candidate cells within the rangeToBestCell range whose signal quality is worse than the best cell. Optionally, it can also be combined with the existing condition "the cell with the most beams meeting the threshold", and the priorities of the two conditions can be configured by the network.

In the satellite network, for a satellite that supports the regenerative forwarding architecture of the inter-satellite link, due to the introduction of the inter-satellite link, the satellite (gNB-DU or gNB) may be connected to The remote ground station causes a relatively large delay between the UE accessing the satellite NTN cell and the data network, so some UEs that require services with time delay are not suitable for accessing the satellite. The solution provides the UE with satellite (gNB-DU or gNB) ground station location information/backhaul link delay information. When the UE performs cell selection and reselection, in addition to RSRP or distance-based cell selection and reselection criteria, The UE can select the optimal cell to access based on the information to avoid excessive delay.

The preferred embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application. These simple modifications all belong to the protection scope of the present application. For example, the various specific technical features described in the above specific implementation manners can be combined in any suitable manner if there is no contradiction. Separately. As another example, any combination of various implementations of the present application can also be made, as long as they do not violate the idea of the present application, they should also be regarded as the content disclosed in the present application. For another example, on the premise of no conflict, the various embodiments described in this application and/or the technical features in each embodiment can be combined with the prior art arbitrarily, and the technical solutions obtained after the combination should also fall within the scope of this application. protected range.

It should also be understood that, in various method embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the order of execution of the processes should be determined by their functions and internal logic, and should not be used in this application. The implementation of the examples constitutes no limitation. In addition, in this embodiment of the application, the terms "downlink", "uplink" and "sidelink" are used to indicate the transmission direction of signals or data, wherein "downlink" is used to indicate that the transmission direction of signals or data is sent from the station The first direction to the user equipment in the cell, "uplink" is used to indicate that the signal or data transmission direction is the second direction sent from the user equipment in the cell to the station, and "side line" is used to indicate that the signal or data transmission direction is A third direction sent from UE1 to UE2. For example, "downlink signal" indicates that the transmission direction of the signal is the first direction. In addition, in the embodiment of the present application, the term "and/or" is only an association relationship describing associated objects, indicating that there may be three relationships. Specifically, A and/or B may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

Fig. 11 is a schematic diagram of the first structural composition of a wireless communication device provided by an embodiment of the present application, which is applied to a terminal device. As shown in Fig. 11 , the wireless communication device 1100 includes:

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

The location information of the NTN gateway;

Time delay information between satellites covering the NTN cell and the NTN gateway;

The distance between the satellite covering the NTN cell and the NTN gateway.

The first distance corresponding to the resident cell is less than a first distance threshold, the first distance corresponding to the resident cell is determined based on the location information of the NTN gateway corresponding to the resident cell, and the first distance corresponding to the resident cell is the distance between the satellite covering the resident cell and the NTN gateway;

The hop count of the inter-satellite link corresponding to the camped cell is less than the first hop count threshold;

The delay information corresponding to the camped cell is less than a first delay threshold;

The delay corresponding to the delay level corresponding to the camping cell is less than the delay corresponding to the set first delay level;

The distance corresponding to the camping cell is smaller than the second distance threshold.

The resident 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 position 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;

The resident cell is the first candidate NTN cell with the smallest hop number corresponding to the inter-satellite link among the at least two first candidate NTN cells;

The resident cell is the first candidate NTN cell with the smallest corresponding delay information among the at least two first candidate NTN cells;

The resident cell is the first candidate NTN cell with the smallest delay corresponding to the corresponding delay level among the at least two first candidate NTN cells;

The camped cell is the first candidate NTN cell with the smallest corresponding distance among the at least two first candidate NTN cells.

In some embodiments, the criteria for the terminal device to perform cell reselection include:

The second distance corresponding to the target cell is less than a 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, and the second distance corresponding to the target cell is to cover the The distance between the satellite of the target cell and the NTN gateway;

The hop count of the inter-satellite link corresponding to the target cell is less than a second hop count threshold;

The delay information corresponding to the target cell is less than a second delay threshold;

The delay corresponding to the delay level corresponding to the target cell is less than the delay corresponding to the set second delay level;

The distance corresponding to the target cell is smaller than a fourth distance threshold.

The target cell is the second candidate NTN cell with the smallest corresponding second distance among at least two second candidate NTN cells, and the second candidate NTN cell is the second NTN cell or the second NTN cell that at least satisfies the third criterion. Three NTN cells; the second distance is determined based on the location information of the NTN gateway, and 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 corresponding inter-satellite link hop number among the at least two second candidate NTN cells;

The target cell is the second candidate NTN cell with the smallest corresponding delay information among the at least two second candidate NTN cells;

The target cell is the second candidate NTN cell with the smallest delay corresponding to the corresponding delay level among the at least two second candidate NTN cells;

The target cell is the second candidate NTN cell corresponding to the smallest distance among the at least two second candidate NTN cells.

In some embodiments, the criterion for the terminal device to perform cell reselection further includes:

A fifth criterion, the fifth criterion is a beam-based criterion.

The priority of the fourth criterion is lower than the priority of the fifth criterion.

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

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 satisfies the The second NTN cell or the third NTN cell of 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, and the second distance is coverage The distance between the satellite of the second candidate NTN cell and the NTN gateway;

MIB, SIB.

Fig. 12 is a first structural diagram of a wireless communication device provided by an embodiment of the present application, which is applied to a network device. As shown in Fig. 12, the wireless communication device 1200 includes:

The sending unit 1201 is configured to send instruction information to the terminal device; the instruction information is information related to the NTN gateway corresponding to the non-terrestrial network NTN cell; the instruction information is used for the terminal device to perform cell selection or cell reselection.

The location information of the NTN gateway;

The distance between the satellite covering the NTN cell and the NTN gateway.

In some embodiments, when the terminal device does not access an NTN cell, the cell selected by the cell is determined based on indication information corresponding to at least one first NTN cell, and the first NTN cell is the terminal device Unconnected NTN cells.

In some embodiments, the criteria for cell selection include:

In some embodiments, when the terminal device accesses a 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 The second NTN cell is an NTN cell currently accessed by the terminal device, and the third NTN cell is a neighboring cell of the second NTN cell.

In some embodiments, the criteria for cell reselection include:

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

A fifth criterion, the fifth criterion is a beam-based criterion.

MIB, SIB.

Those skilled in the art should understand that the related description of the wireless communication apparatus in the embodiment of the present application can be understood with reference to the related description of the wireless communication method in the embodiment of the present application.

Fig. 13 is a schematic structural diagram of a communication device 1300 provided by an embodiment of the present application. The communication device may be a terminal device or a network device. The communication device 1300 shown in FIG. 13 includes a processor 1310, and the processor 1310 can invoke and run a computer program from a memory, so as to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 13 , the communication device 1300 may further include a memory 1320 . Wherein, the processor 1310 can invoke and run a computer program from the memory 1320, so as to implement the method in the embodiment of the present application.

Wherein, the memory 1320 may be an independent device independent of the processor 1310 , or may be integrated in the processor 1310 .

Optionally, as shown in FIG. 13 , the communication device 1300 may further include a transceiver 1330, and the processor 1310 may control the transceiver 1330 to communicate with other devices, specifically, to send information or data to other devices, or to receive other Information or data sent by the device.

Wherein, 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.

Optionally, the communication device 1300 may specifically be the network device of the embodiment of the present application, and the communication device 1300 may implement the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, details are not repeated here. .

Optionally, the communication device 1300 may specifically be the mobile terminal/terminal device of the embodiment of the present application, and the communication device 1300 may implement the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, for the sake of brevity , which will not be repeated here.

FIG. 14 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 1400 shown in FIG. 14 includes a processor 1410, and the processor 1410 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 14 , the chip 1400 may further include a memory 1420 . Wherein, the processor 1410 can call and run a computer program from the memory 1420, so as to implement the method in the embodiment of the present application.

Wherein, the memory 1420 may be an independent device independent of the processor 1410 , or may be integrated in the processor 1410 .

Optionally, the chip 1400 may also include an input interface 1430 . Wherein, the processor 1410 can control the input interface 1430 to communicate with other devices or chips, specifically, can obtain information or data sent by other devices or chips.

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

Optionally, the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the network device in the methods of the embodiment of the present application. For the sake of brevity, details are not repeated here.

Optionally, the chip can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiments of the present application. For the sake of brevity, here No longer.

It should be understood that the chip mentioned in the embodiment of the present application may also be called a system-on-chip, a system-on-chip, a system-on-a-chip, or a system-on-a-chip.

FIG. 15 is a schematic block diagram of a communication system 1500 provided by an embodiment of the present application. As shown in FIG. 15 , the communication system 1500 includes a terminal device 1510 and a network device 1520 .

Wherein, the terminal device 1510 can be used to realize the corresponding functions realized by the terminal device in the above method, and the network device 1520 can be used to realize the corresponding functions realized by the network device in the above method. .

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

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

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

The embodiment of the present application also provides a computer-readable storage medium for storing computer programs.

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

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

The embodiment of the present application also provides a computer program product, including computer program instructions.

Optionally, the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, the Let me repeat.

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

The embodiment of the present application also provides a computer program.

Optionally, the computer program can be applied to the network device in the embodiment of the present application. When the computer program is run on the computer, the computer executes the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity , which will not be repeated here.

Optionally, the computer program can be applied to the mobile terminal/terminal device in the embodiment of the present application. When the computer program is run on the computer, the computer executes each method in the embodiment of the present application to be implemented by the mobile terminal/terminal device For the sake of brevity, the corresponding process will not be repeated here.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

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

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

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

If the functions described above are realized in the form of software function 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 the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disc, etc., which can store program codes. .

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

A method of wireless communication, the method comprising:

The terminal device receives the indication information sent by the network equipment; the indication information is information related to the NTN gateway corresponding to the non-terrestrial network communication NTN cell;

The indication information is used for the terminal device to perform cell selection or cell reselection.
The method according to claim 1, wherein the indication information includes at least one of the following:

The location information of the NTN gateway;

The hop count of the inter-satellite link between the satellite covering the NTN cell and the NTN gateway;

Time delay information between satellites covering the NTN cell and the NTN gateway;

The delay level between the satellite covering the NTN cell and the NTN gateway;

The distance between the satellite covering the NTN cell and the NTN gateway.
The method according to claim 2, wherein, when the terminal device does not access an NTN cell, the terminal device performs cell selection based on indication information corresponding to at least one first NTN cell, so as to determine a cell to camp on, The first NTN cell is an NTN cell not accessed by the terminal device.
The method according to claim 3, wherein the criteria for cell selection include:

A first criterion, where the first criterion is a criterion for cell selection based on signal quality;

A second criterion, where the second criterion is a criterion for cell selection based on the indication information;

The priority of the first criterion is higher than the priority of the second criterion.
The method of claim 4, wherein the second criterion includes at least one of the following conditions:

The first distance corresponding to the resident cell is less than a first distance threshold, the first distance corresponding to the resident cell is determined based on the location information of the NTN gateway corresponding to the resident cell, and the first distance corresponding to the resident cell is the distance between the satellite covering the resident cell and the NTN gateway;

The hop count of the inter-satellite link corresponding to the camped cell is less than the first hop count threshold;

The delay information corresponding to the camped cell is less than a first delay threshold;

The delay corresponding to the delay level corresponding to the camping cell is less than the delay corresponding to the set first delay level;

The distance corresponding to the camping cell is smaller than the second distance threshold.
The method according to claim 4 or 5, wherein the second criterion comprises at least one of the following conditions:

The resident 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 position 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;

The resident cell is the first candidate NTN cell with the smallest hop number corresponding to the inter-satellite link among the at least two first candidate NTN cells;

The resident cell is the first candidate NTN cell with the smallest corresponding delay information among the at least two first candidate NTN cells;

The resident cell is the first candidate NTN cell with the smallest delay corresponding to the corresponding delay level among the at least two first candidate NTN cells;

The camped cell is the first candidate NTN cell with the smallest corresponding distance among the at least two first candidate NTN cells.
The method according to claim 2, wherein, when the terminal device accesses a second NTN cell, the terminal device is based on the indication information corresponding to the second NTN cell and the indication information corresponding to the third NTN cell Performing cell reselection to determine a 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.
The method according to claim 7, wherein the criteria for cell reselection include:

A third criterion, the third criterion is a criterion for performing cell reselection based on signal quality;

A fourth criterion, where the fourth criterion is a criterion for performing cell reselection based on the indication information;

The priority of the third criterion is higher than the priority of the fourth criterion.
The method of 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 a 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, and the second distance corresponding to the target cell is to cover the The distance between the satellite of the target cell and the NTN gateway;

The hop count of the inter-satellite link corresponding to the target cell is less than a second hop count threshold;

The delay information corresponding to the target cell is less than a second delay threshold;

The delay corresponding to the delay level corresponding to the target cell is less than the delay corresponding to the set second delay level;

The distance corresponding to the target cell is smaller than a fourth distance threshold.
The method according to claim 8 or 9, 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, and the second candidate NTN cell is the second NTN cell or the second NTN cell that at least satisfies the third criterion. Three NTN cells; the second distance is determined based on the location information of the NTN gateway, and 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 corresponding inter-satellite link hop number among the at least two second candidate NTN cells;

The target cell is the second candidate NTN cell with the smallest corresponding delay information among the at least two second candidate NTN cells;

The target cell is the second candidate NTN cell with the smallest delay corresponding to the corresponding delay level among the at least two second candidate NTN cells;

The target cell is the second candidate NTN cell corresponding to the smallest distance among the at least two second candidate NTN cells.
The method according to any one of claims 8 to 10, wherein the criterion for cell reselection further comprises:

A fifth criterion, the fifth criterion is a beam-based criterion.
The method according to claim 11, wherein the priority of the fourth criterion is higher than the priority of the fifth criterion; or, the priority of the fourth criterion is lower than the priority of the fifth criterion .
The method according to claim 11 or 12, wherein the priority of the fourth criterion and the priority of the fifth criterion are configured by the network device.
The method according to claim 12, wherein, 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 The cell is the second NTN cell or the third NTN cell satisfying 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, and the second distance is coverage The distance between the satellite of the second candidate NTN cell and the NTN gateway;

The target cell is the second candidate NTN cell with the smallest corresponding inter-satellite link hop number among the at least two second candidate NTN cells;

The target cell is the second candidate NTN cell with the smallest corresponding delay information among the at least two second candidate NTN cells;

The target cell is the second candidate NTN cell with the smallest delay corresponding to the corresponding delay level among the at least two second candidate NTN cells;

The target cell is the second candidate NTN cell corresponding to the smallest distance among the at least two second candidate NTN cells.
The method according to any one of claims 1 to 14, wherein the indication information is carried in system information broadcast by the network device.
The method according to claim 15, wherein the system information includes at least one of the following:

Master information block MIB, system information block SIB.
A method of wireless communication, comprising:

The network device sends instruction information to the terminal device; the instruction information is information related to the NTN gateway corresponding to the non-terrestrial network NTN cell; the instruction information is used for the terminal device to perform cell selection or cell reselection.
The method according to claim 17, wherein the indication information includes at least one of the following:

The location information of the NTN gateway;

The hop count of the inter-satellite link between the satellite covering the NTN cell and the NTN gateway;

Time delay information between satellites covering the NTN cell and the NTN gateway;

The delay level between the satellite covering the NTN cell and the NTN gateway;

The distance between the satellite covering the NTN cell and the NTN gateway.
The method according to claim 18, wherein, in the case that the terminal device does not access an NTN cell, the cell selected by the cell is determined based on indication information corresponding to at least one first NTN cell, and the first NTN cell is an NTN cell that the terminal device has not accessed.
The method of claim 19, wherein the criteria for cell selection include:

A first criterion, where the first criterion is a criterion for cell selection based on signal quality;

A second criterion, where the second criterion is a criterion for cell selection based on the indication information;

The priority of the first criterion is higher than the priority of the second criterion.
The method of claim 20, wherein the second criterion includes at least one of the following conditions:

The first distance corresponding to the resident cell is less than a first distance threshold, the first distance corresponding to the resident cell is determined based on the location information of the NTN gateway corresponding to the resident cell, and the first distance corresponding to the resident cell is the distance between the satellite covering the resident cell and the NTN gateway;

The hop count of the inter-satellite link corresponding to the camped cell is less than the first hop count threshold;

The delay information corresponding to the camped cell is less than a first delay threshold;

The delay corresponding to the delay level corresponding to the camping cell is less than the delay corresponding to the set first delay level;

The distance corresponding to the camping cell is smaller than the second distance threshold.
A method according to claim 20 or 21, wherein said second criterion comprises at least one of the following conditions:

The resident 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 position 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;

The resident cell is the first candidate NTN cell with the smallest hop number corresponding to the inter-satellite link among the at least two first candidate NTN cells;

The resident cell is the first candidate NTN cell with the smallest corresponding delay information among the at least two first candidate NTN cells;

The resident cell is the first candidate NTN cell with the smallest delay corresponding to the corresponding delay level among the at least two first candidate NTN cells;

The camped cell is the first candidate NTN cell with the smallest corresponding distance among the at least two first candidate NTN cells.
The method according to claim 18, wherein, when the terminal device accesses a second NTN cell, the target cell for cell reselection is based on the indication information corresponding to the second NTN cell and the information corresponding to the third NTN cell The indication information determines that 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.
The method according to claim 23, wherein the criteria for cell reselection include:

A third criterion, the third criterion is a criterion for performing cell reselection based on signal quality;

A fourth criterion, where the fourth criterion is a criterion for performing cell reselection based on the indication information;

The priority of the third criterion is higher than the priority of the fourth criterion.
The method of 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 a 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, and the second distance corresponding to the target cell is to cover the The distance between the satellite of the target cell and the NTN gateway;

The hop count of the inter-satellite link corresponding to the target cell is less than a second hop count threshold;

The delay information corresponding to the target cell is less than a second delay threshold;

The delay corresponding to the delay level corresponding to the target cell is less than the delay corresponding to the set second delay level;

The distance corresponding to the target cell is smaller than a fourth distance threshold.
The method according to claim 24 or 25, wherein said fourth criterion comprises 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, and the second candidate NTN cell is the second NTN cell or the second NTN cell that at least satisfies the third criterion. Three NTN cells; the second distance is determined based on the location information of the NTN gateway, and 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 corresponding inter-satellite link hop number among the at least two second candidate NTN cells;

The target cell is the second candidate NTN cell with the smallest corresponding delay information among the at least two second candidate NTN cells;

The target cell is the second candidate NTN cell with the smallest delay corresponding to the corresponding delay level among the at least two second candidate NTN cells;

The target cell is the second candidate NTN cell corresponding to the smallest distance among the at least two second candidate NTN cells.
The method according to any one of claims 24 to 26, wherein the criterion for cell reselection further comprises:

A fifth criterion, the fifth criterion is a beam-based criterion.
The method of 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 .
The method according to claim 27 or 28, wherein the priority of the fourth criterion and the priority of the fifth criterion are configured by the network device.
The method according to claim 28, wherein, 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 The cell is the second NTN cell or the third NTN cell satisfying 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, and the second distance is coverage The distance between the satellite of the second candidate NTN cell and the NTN gateway;

The target cell is the second candidate NTN cell with the smallest corresponding inter-satellite link hop number among the at least two second candidate NTN cells;

The target cell is the second candidate NTN cell with the smallest corresponding delay information among the at least two second candidate NTN cells;

The target cell is the second candidate NTN cell with the smallest delay corresponding to the corresponding delay level among the at least two second candidate NTN cells;

The target cell is the second candidate NTN cell corresponding to the smallest distance among the at least two second candidate NTN cells.
The method according to any one of claims 17 to 30, wherein the indication information is carried in system information broadcast by the network device.
The method according to claim 31, wherein the system information includes at least one of the following:

Master information block MIB, system information block SIB.
A wireless communication device, applied to terminal equipment, comprising:

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 non-terrestrial network communication NTN cell; the indication information is used for the terminal equipment to perform cell selection or cell reselection.
A wireless communication device, applied to network equipment, comprising:

The sending unit is configured to send indication information to the terminal equipment; the indication information is information related to the NTN gateway corresponding to the non-terrestrial network NTN cell; the indication information is used for the terminal equipment to perform cell selection or cell reselection.
A terminal device, comprising: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute the computer program described in any one of claims 1 to 16 Methods.
A network device, comprising: a processor and a memory, the memory is used to store a computer program, the processor is used to invoke and run the computer program stored in the memory, and execute the computer program described in any one of claims 17 to 32 Methods.
A chip, comprising: a processor, configured to invoke and run a computer program from a memory, so that a device equipped with the chip executes the method according to any one of claims 1 to 16.
A chip, comprising: a processor, configured to invoke and run a computer program from a memory, so that a device equipped with the chip executes the method as claimed in any one of claims 17 to 32.
A computer-readable storage medium for storing a computer program, the computer program causing a computer to execute the method according to any one of claims 1 to 16.
A computer-readable storage medium for storing a computer program, the computer program causing a computer to execute the method according to any one of claims 17 to 32.
A computer program product comprising computer program instructions causing a computer to perform the method as claimed in any one of claims 1 to 16.
A computer program product comprising computer program instructions for causing a computer to perform the method as claimed in any one of claims 17 to 32.
A computer program that causes a computer to perform the method as claimed in any one of claims 1 to 16.
A computer program that causes a computer to perform the method as claimed in any one of claims 17 to 32.