WO2024192760A1 - 无线通信的方法和装置 - Google Patents

无线通信的方法和装置 Download PDF

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Publication number
WO2024192760A1
WO2024192760A1 PCT/CN2023/083339 CN2023083339W WO2024192760A1 WO 2024192760 A1 WO2024192760 A1 WO 2024192760A1 CN 2023083339 W CN2023083339 W CN 2023083339W WO 2024192760 A1 WO2024192760 A1 WO 2024192760A1
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WO
WIPO (PCT)
Prior art keywords
cell
information
terminal device
satellite
time
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/083339
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English (en)
French (fr)
Inventor
吕玲
赵铮
杨中志
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Quectel Wireless Solutions Co Ltd
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Quectel Wireless Solutions Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Quectel Wireless Solutions Co Ltd filed Critical Quectel Wireless Solutions Co Ltd
Priority to EP23928072.0A priority Critical patent/EP4686261A4/en
Priority to PCT/CN2023/083339 priority patent/WO2024192760A1/zh
Priority to CN202380009526.3A priority patent/CN116830695A/zh
Publication of WO2024192760A1 publication Critical patent/WO2024192760A1/zh
Priority to US19/222,975 priority patent/US20250293765A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18513—Transmission in a satellite or space-based system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
    • H04B7/18545—Arrangements for managing station mobility, i.e. for station registration or localisation
    • H04B7/18547—Arrangements for managing station mobility, i.e. for station registration or localisation for geolocalisation of a station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
    • H04B7/18539—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
    • H04B7/18539—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection
    • H04B7/18541—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection for handover of resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/04—Reselecting a cell layer in multi-layered cells
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/003—Locating users or terminals or network equipment for network management purposes, e.g. mobility management locating network equipment

Definitions

  • the present application relates to the field of communication technology, and more specifically, to a method and device for wireless communication.
  • NTN non-terrestrial network
  • the terminal device may need to know the accurate reference position of the cell. For example, when the terminal device is in the radio resource control (RRC) idle state or RRC inactive state, it may need to know the accurate reference position of the cell to trigger cell selection/reselection. Then, in the scenario where the reference position of the cell changes with the movement of the satellite, how the terminal device determines the reference position of the cell is a problem that needs to be solved.
  • RRC radio resource control
  • the present application provides a method and device for wireless communication.
  • the following introduces various aspects of the present application.
  • a method for wireless communication comprising: a terminal device receives first information, the first information being used to indicate a continuous reference position of a first cell in a first time period, and a coverage range of the first cell changes with movement of a satellite.
  • a method for wireless communication comprising: a base station sends first information, wherein the first information is used to indicate a continuous reference position of a first cell in a first time period, and the coverage of the first cell changes with the movement of a satellite.
  • a wireless communication device which is a terminal device and includes: a receiving module for receiving first information, wherein the first information is used to indicate a continuous reference position of a first cell in a first time period, and the coverage range of the first cell changes with the movement of the satellite.
  • a wireless communication device which is a base station, and includes: a sending module, used to send first information, wherein the first information is used to indicate a continuous reference position of a first cell in a first time period, and the coverage range of the first cell changes with the movement of the satellite.
  • a wireless communication device comprising a processor, a memory, and a communication interface, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the wireless communication device executes the method described in any one of the first aspect to the second aspect.
  • an embodiment of the present application provides a communication system, which includes the wireless communication device described above.
  • the system may also include other devices that interact with the wireless communication device in the solution provided in the embodiment of the present application.
  • an embodiment of the present application provides a device, comprising a processor, for calling a program from a memory to execute the method described in any one of the first to second aspects.
  • an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program enables a wireless communication device to perform part or all of the steps in the methods of each aspect described above.
  • an embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a wireless communication device to perform some or all of the steps in the above-mentioned various aspects of the method.
  • the computer program product can be a software installation package.
  • an embodiment of the present application provides a computer program, which enables a computer to execute part or all of the steps in the methods of the above aspects.
  • an embodiment of the present application provides a chip, which includes a memory and a processor, and the processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.
  • the first information can indicate the continuous reference position of the first cell in the first time period, so that the terminal device can use the first information to determine the reference position of the first cell at any time in the first time period.
  • the embodiment of the present application can determine the reference position of the cell without updating the first information at a high frequency, which is conducive to saving signaling overhead.
  • FIGS 1A-1C are diagrams showing examples of system architectures of communication systems to which embodiments of the present application may be applied.
  • FIG2 is an example diagram of a satellite network architecture to which an embodiment of the present application may be applied.
  • FIG3 is an example diagram of another satellite network architecture to which an embodiment of the present application may be applied.
  • FIG4 is an exemplary diagram of another satellite network architecture to which the embodiments of the present application can be applied.
  • FIG5 is a schematic diagram of an earth mobile cell scenario.
  • FIG6 is a schematic flow chart of a wireless communication method provided in an embodiment of the present application.
  • FIG. 7 is a schematic flow chart of a wireless communication method provided in another embodiment of the present application.
  • FIG8 is a flow chart of a wireless communication method on the network side provided in an embodiment of the present application.
  • FIG9 is a flow chart of a wireless communication method on the terminal device side provided in an embodiment of the present application.
  • FIG10 is a schematic diagram of the relative positions of the first cell and the satellite provided in an embodiment of the present application.
  • FIG. 11 is a schematic diagram of the structure of a wireless communication device provided in an embodiment of the present application.
  • FIG12 is a schematic diagram of the structure of a wireless communication device provided in another embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a communication device provided in an embodiment of the present application.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • LTE-A advanced long term evolution
  • NR new radio
  • LTE-based access to unlicensed spectrum LTE-U
  • NR-based access to unlicensed spectrum NR-U system
  • NTN non terrestrial network
  • UMTS universal mobile telecommunication system
  • WLAN wireless local area networks
  • WiFi wireless fidelity
  • 5G fifth-generation
  • future communication systems such as sixth-generation mobile communication systems, and satellite communication systems.
  • D2D device to device
  • M2M machine to machine
  • MTC machine type communication
  • V2V vehicle to vehicle
  • V2X vehicle to everything
  • CA carrier aggregation
  • DC dual connectivity
  • SA standalone
  • the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, where the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to an authorized spectrum, where the authorized spectrum can also be considered as a dedicated spectrum.
  • NTN systems include NR-based NTN systems and IoT-based NTN systems.
  • the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device, etc.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal
  • remote terminal remote terminal
  • mobile device user terminal
  • terminal wireless communication equipment
  • user agent or user device etc.
  • the terminal device may be a station (STATION, ST) in a WLAN, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a next-generation communication system such as an NR network, or a terminal device in a future evolving public land mobile network (PLMN) network, etc.
  • STATION station
  • WLAN Wireless Local Area Network
  • a terminal device may be a device that provides voice and/or data connectivity to a user, and may be used to connect people, objects, and machines, such as a handheld device with a wireless connection function, a vehicle-mounted device, etc.
  • the terminal device in the embodiment of the present application may be a mobile phone, a tablet computer (Pad), a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc.
  • the terminal device may be used to act as a base station.
  • the terminal device may act as a scheduling entity that provides a sidelink signal between terminal devices in V2X or D2D, etc.
  • a cellular phone and a car communicate with each other using a sidelink signal.
  • Cellular phones and smart home devices communicate with each other without relaying the communication signal through a base station.
  • the terminal device may also be a wearable device.
  • Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.
  • the network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be referred to as an access network device or a wireless access network device, such as a base station.
  • the network device in the embodiment of the present application may refer to a wireless access network (RAN) node (or device) that connects a terminal device to a wireless network.
  • RAN wireless access network
  • Base station can broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc.
  • the base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof.
  • the base station can also refer to a communication module, a modem or a chip used to be arranged in the aforementioned device or apparatus.
  • the base station can also be a mobile switching center and a device to device D2D, vehicle-to-everything (V2X), a device that performs the base station function in machine-to-machine (M2M) communications, a network side device in a 6G network, and a device that performs the base station function in a future communication system.
  • the base station can support networks with the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network equipment.
  • Base stations can be fixed or mobile.
  • a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station.
  • a helicopter or drone can be configured to act as a device that communicates with another base station.
  • the network device in the embodiments of the present application may refer to a CU or a DU, or the network device includes a CU and a DU.
  • the gNB may also include an AAU.
  • the network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and satellites in the air.
  • the embodiments of the present application do not limit the scenarios in which the network equipment and terminal equipment are located.
  • the network device may have a mobile feature, for example, the network device may be a mobile device.
  • the network device may be a satellite or a balloon station.
  • the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc.
  • the network device may also be a base station set up in a location such as land or water.
  • a network device can provide services for a cell, and a terminal device communicates with the network device through transmission resources used by the cell (for example, frequency domain resources, or spectrum resources).
  • the cell can be a cell corresponding to a network device (for example, a base station), and the cell can belong to a macro base station or a base station corresponding to a small cell.
  • the small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • FIG1A is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, terminal).
  • the network device 110 may provide communication coverage for a specific geographical area, and may communicate with terminal devices located in the coverage area.
  • FIG1A exemplarily shows a network device and two terminal devices.
  • the communication system 100 may include multiple network devices and each network device may include other number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.
  • FIG1B is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application.
  • a terminal device 1101 and a satellite 1102 are included, and wireless communication can be performed between the terminal device 1101 and the satellite 1102.
  • the network formed between the terminal device 1101 and the satellite 1102 can also be referred to as an NTN.
  • the satellite 1102 can have the function of a base station, and the terminal device 1101 and the satellite 1102 can communicate directly. Under the system architecture, the satellite 1102 can be referred to as a network device.
  • a plurality of network devices 1102 may be included in the communication system, and each network device 1102 may include other number of terminal devices within its coverage range, which is not limited in the embodiments of the present application.
  • FIG1C is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application.
  • a terminal device 1201, a satellite 1202 and a base station 1203 are included.
  • Wireless communication can be performed between the terminal device 1201 and the satellite 1202, and communication can be performed between the satellite 1202 and the base station 1203.
  • the network formed between the terminal device 1201, the satellite 1202 and the base station 1203 can also be referred to as NTN.
  • the satellite 1202 may not have the function of a base station, and the communication between the terminal device 1201 and the base station 1203 needs to be transferred through the satellite 1202.
  • the base station 1203 can be referred to as a network device.
  • a plurality of network devices 1203 may be included in the communication system, and other number of terminal devices may be included within the coverage range of each network device 1203, which is not limited in the embodiment of the present application.
  • Figures 1A-1C are only examples of the system to which the present application is applicable.
  • the method shown in the embodiment of the present application can also be applied to other systems, such as 5G communication systems, LTE communication systems, etc.
  • the embodiment of the present application does not make specific limitations on this.
  • the wireless communication system shown in Figures 1A-1C may also include other network entities such as a mobility management entity (MME) and an access and mobility management function (AMF), but the embodiments of the present application are not limited to this.
  • MME mobility management entity
  • AMF access and mobility management function
  • NTN generally uses satellite communications to provide communication services to ground users.
  • ground communication networks for example, ground cellular network communications
  • satellite communications have many unique advantages.
  • satellite communications are not limited by the user's geographical location.
  • general ground communication networks cannot cover areas such as oceans, mountains, deserts, etc. where network equipment cannot be set up.
  • ground communication networks do not cover certain sparsely populated areas.
  • a satellite can cover a larger ground area and the satellite can orbit the earth, in theory, every corner of the earth can be covered by the satellite communication network.
  • Satellite communications have great social value. Satellite communications can cover remote mountainous areas, poor and backward countries or regions at a relatively low cost, so that people in these areas can enjoy advanced voice communications and mobile Internet technologies. From this perspective, satellite communications are conducive to narrowing the digital divide with developed regions and promoting the development of these regions.
  • satellite communication has the advantage of long distance, and the increase in communication distance does not significantly increase the cost of communication.
  • LEO low earth orbit
  • MEO medium earth orbit
  • GEO geostationary earth orbit
  • HEO high elliptical orbit
  • the altitude of LEO satellites is generally between 500km and 1500km. Accordingly, the orbital period of LEO satellites is about 1.5 hours to 2 hours.
  • the signal propagation delay of single-hop communication between users is generally less than 20ms.
  • the maximum satellite visibility time of LEO satellites is about 20 minutes. LEO satellites have the advantages of short signal propagation distance, low link loss, and low transmission power requirements for user terminal devices.
  • the orbital altitude of GEO satellites is 35786km.
  • the period of GEO satellite rotation around the earth is 24 hours.
  • the signal propagation delay of single-hop communication between users is generally about 250ms.
  • satellites In order to ensure satellite coverage and improve the system capacity of the entire satellite communication system, satellites usually use multiple beams to cover the ground area. Therefore, a satellite can form dozens or even hundreds of beams to cover the ground area. One beam of a satellite can cover a ground area with a diameter of tens to hundreds of kilometers.
  • the NTN system includes the NR-NTN system and the Internet of Things (IoT)-NTN system.
  • IoT Internet of Things
  • 3GPP considers two types of satellites: one is a satellite with transparent payload, and the other is a satellite with regenerative payload.
  • the following text introduces the network architecture of a satellite with transparent payload and the network architecture of a satellite with regenerative payload, respectively, in conjunction with Figures 2 to 4.
  • the satellite network architecture may include a terminal device 210, a satellite node 222, and a ground receiving station 221 (referred to as a "ground station").
  • a ground station There is wireless communication between the terminal device 210 and the satellite node 222, and the terminal device 210 can send data to the satellite node 221 through the link between the terminal device 210 and the satellite node 221.
  • the satellite node 221 can be sent to the satellite node 221 through a service link.
  • the satellite node 221 receives the data, it can be sent to the ground receiving station 222 through the link between the satellite node 221 and the ground receiving station 222.
  • the ground receiving station 221 can be transmitted to the ground receiving station 221 through a wireless link (such as a feeder link). Accordingly, after the ground receiving station 221 receives the data from the satellite node 222, it transmits the data to the core network (data network), and then processes the data through the core network, such as interacting with other terminals.
  • the service link here refers to the link between the terminal device 210 and the satellite node 222
  • the feeder link refers to the link between the satellite node 222 and the ground receiving station 221.
  • the link between the terminal device and the satellite node, and/or the satellite node The link between the ground receiving station can also be expressed by other terms, which are not limited in this application.
  • the above-mentioned satellite node 222 can be divided into three types.
  • the first type of satellite node is only used for forwarding, that is, it only has a transparent forwarding function.
  • such satellite nodes can only provide one or more of a wireless frequency filtering function, a frequency conversion function, and a power amplification function.
  • the received terminal device signal can be amplified and then sent to the ground receiving station.
  • the terminal device signal is not processed at the satellite node, as shown in FIG2; wherein, the terminal device and the satellite node can communicate through the NR-Uu interface, the satellite node and the ground receiving station (such as the NTN radio remote unit (RRU) and gNB) can communicate through the NR-Uu interface, the ground receiving station and the 5G core network (5G CN) can communicate through the N1, N2, and N3 interfaces, and the 5G CN and the data network can communicate through the N6 interface.
  • the terminal device and the satellite node can communicate through the NR-Uu interface
  • the satellite node and the ground receiving station such as the NTN radio remote unit (RRU) and gNB
  • RRU radio remote unit
  • gNB the ground receiving station
  • 5G core network 5G core network
  • the 5G CN and the data network can communicate through the N6 interface.
  • the second type of satellite node has complete base station processing functions.
  • the satellite node is a base station for the terminal equipment on the ground.
  • the communication between the satellite node and the terminal equipment is basically the same as the normal 5G communication, as shown in Figure 3.
  • such satellite nodes can also provide one or more of the following functions: demodulation function, decoding function, routing function, conversion function, encoding function, and modulation function.
  • the terminal equipment and the satellite node can communicate through the NR-Uu interface, and the satellite node and the ground receiving station can communicate through the satellite radio interface (satellite radio interface, SRI).
  • SRI interface can be used to send interface messages between the satellite node and the 5G CN (such as N2, N3 interface messages).
  • the ground receiving station and the 5G CN can communicate through the N1, N2, and N3 interfaces, and the 5G CN and the data network can communicate through the N6 interface.
  • the third type of satellite node has the processing function of DU.
  • the satellite node is a DU for the terminal equipment on the ground.
  • the communication between the satellite node and the terminal equipment is basically the same as the communication between the terminal equipment and the DU in the normal 5G terrestrial communication system, as shown in Figure 4.
  • the terminal equipment and the satellite node can communicate through the NR-Uu interface
  • the satellite node and the ground receiving station (such as gNB-CU) can communicate through the SRI interface
  • the SRI interface can transmit the F1 interface message between the satellite and the ground receiving station.
  • the ground receiving station and the 5G CN can communicate through the N1/2/3 interface
  • the 5G CN and the data network can communicate through the N6 interface.
  • the coverage of the NTN cell may change with the movement of the satellite, causing the reference position of the cell to change with the movement of the satellite.
  • the NTN cell includes an earth-moving cell, and the coverage of the earth-moving cell changes with the movement of the satellite.
  • the coverage area of the satellite is A at time T1 and B at time T2.
  • the arrows in FIG5 are used to indicate the moving direction of the satellite.
  • R17 mainly cuts into cell switching, cell selection/reselection, etc., analyzes the problems and requirements that may arise when terrestrial technology is applied to NTN, and proposes some protocol enhancement solutions in R17, but these solutions can only solve some problems.
  • R18 it is still necessary to study the mobility enhancement solution of NTN.
  • the proposals related to NTN cell reselection enhancement the current discussion points of various companies are focused on the optimization of NTN-TN and NTN-NTN cell reselection.
  • Cell reselection mainly occurs in RRC idle state (IDLE)/RRC inactive state (INACTIVE) terminal devices, allowing the terminal device to complete the switch from the current serving cell to a high-quality cell, for example, switching to a high-level, same-level or low-level high-quality cell.
  • IDLE RRC idle state
  • RRC inactive state INACTIVE
  • cell reselection is mainly completed by the terminal device side, with less participation from the network side.
  • the terminal device may need to know the accurate reference position of the cell to trigger the cell reselection process.
  • TN since the cell position in the ground network is fixed, the terminal device only needs to obtain the reference position once in the TN cell.
  • the reference position of some cells will change with the movement of the satellite.
  • the cell moves at high speed with the satellite, causing the reference position of the cell to change with the movement of the satellite, or in other words, the reference position of the cell may be time-varying.
  • how the terminal device determines the reference position of the cell is a problem that needs to be solved.
  • the network side can directly provide the terminal device side with the reference position of the cell.
  • the reference position of the cell changes frequently, and the network side and the terminal device need to frequently update the information, which increases the communication burden on the terminal device side.
  • the terminal device can calculate the satellite position in real time based on the ephemeris information, and combine the relative position relationship between the cell and the satellite to obtain the real-time reference position of the cell.
  • this solution requires the terminal device to perform high-frequency and real-time ephemeris analysis, which increases the computing power burden on the terminal device side.
  • this solution cannot be used in scenarios where the relative position relationship between the cell and the satellite is not fixed.
  • the network side has a more convenient and comprehensive understanding of information such as beam management and satellite position, and this solution leaves the task of solving the reference position of the cell to the terminal device. In fact, it is difficult for the terminal device to promptly learn about changes in the network side to satellites, beams, and other related information, resulting in low calculation accuracy and poor timeliness.
  • the present application provides a method and apparatus for wireless communication, which does not require the network side and the terminal device side to Frequent information updates can also reduce the computing power burden on the terminal device side.
  • the technical solution of the embodiment of the present application is described in detail below.
  • FIG6 is a flow chart of a method for wireless communication provided by an embodiment of the present application.
  • the method shown in FIG6 is introduced from the perspective of interaction between a terminal device and a base station.
  • the terminal device and the base station may be any type of terminal device and base station mentioned above.
  • the terminal device may be a terminal device in an RRC idle state or in an RRC inactive state.
  • the method of FIG6 may include step S610, in which the base station sends first information to the terminal device.
  • the first information may be used to indicate (or determine) continuous reference positions of the first cell in a first time period.
  • the first information may be used to indicate continuous reference positions of the first cell within a period of time, for example, indicating multiple reference positions of the first cell within a period of time.
  • the first information may include a first parameter, wherein the first parameter may be used to determine (or indicate) trajectory information of a reference position of the first cell.
  • the first parameter can be understood as a parameter of a first model, and the first model can be used to indicate trajectory information of a reference position of the first cell.
  • the first model is used to indicate trajectory information of a reference position of the first cell, and the first model can be used to fit the trajectory of the reference position of the first cell.
  • the first information may include the first model and the parameters of the first model. That is, the first information may include the first model and the first parameters.
  • the terminal device learns the first model and the first parameter, it can determine the continuous reference positions of the first cell in the first time period.
  • the first information is sent based on a request from the terminal device.
  • the method shown in Figure 6 may also include step S605, in which the terminal device sends a first request message to the base station. The first request message is used to obtain the first information.
  • the continuous reference positions of the first cell in the first time period may refer to the reference positions of the first cell at any time in the first time period.
  • the embodiment of the present application does not limit the specific duration of the first time period, that is, the first time period can refer to a period of time of any length, for example, 5 seconds, 20 seconds, 1 minute, etc.
  • the duration of the first time period may be variable, for example, the first information sent by the base station to the terminal device for the first time is used to indicate the continuous reference position of the first cell in the first time period (for example, 5 seconds). Afterwards, the base station sends updated first information to the terminal device, and the updated first information is used to indicate the continuous reference position of the first cell in the first time period (for example, 20 seconds).
  • the embodiment of the present application does not specifically limit the indication method of the first time period.
  • the first time period can be indicated by a start time and a duration, or can be indicated by a start time and an end time, or can be indicated by an end time and a duration, etc.
  • the coverage of the first cell changes with the movement of the satellite.
  • the first cell may refer to a serving cell of the terminal device.
  • the embodiment of the present application is not limited thereto.
  • the first cell may refer to a neighboring cell of the terminal device.
  • the first cell refers to an NTN cell, for example, the first cell may be an earth mobile cell.
  • the reference location of the first cell may also be referred to as the reference point of the first cell or other similar names, which is not limited to the embodiments of the present application.
  • the embodiment of the present application does not specifically limit the setting of the reference position of the first cell.
  • the reference position of the first cell may refer to the center position of the first cell.
  • the embodiment of the present application is not limited thereto.
  • the reference position of the first cell may also refer to the edge position of the first cell, or any other position of the first cell.
  • the shape of the first cell may be irregular.
  • the reference position of the first cell when the reference position of the first cell is the center position of the first cell, it may refer to the geometric center position of the first cell.
  • the edge position of the first cell when the shape of the first cell is irregular, the edge position of the first cell may correspond to multiple different edge positions. In this case, the edge position of the first cell may refer to the edge position closest to the center position of the first cell or the farthest edge position.
  • the reference position of the first cell may be predefined or preconfigured by a protocol. In some embodiments, the reference position of the first cell may be configured by a base station, for example, the base station may configure the reference position of the first cell through high-layer signaling or system information.
  • the first information can indicate the continuous reference position of the first cell in the first time period, so that the terminal device can use the first information to determine the reference position of the first cell at any time in the first time period.
  • the embodiment of the present application does not need to update the first information at a high frequency to determine the reference position of the cell, which is conducive to saving signaling overhead; compared with the solution in which the terminal device calculates the satellite position in real time based on the ephemeris information and then determines the reference position of the first cell
  • the terminal device does not need to determine the reference position of the first cell by calculating the real-time satellite position, but only needs to obtain the first information to obtain the reference position of the first cell at any time within a long period of time, which can reduce the computing power burden on the terminal device side.
  • the embodiments of the present application are more applicable.
  • the embodiments of the present application move the solution of the reference position of the first cell to the network side, which can be better applied to the situation where the relative position of the first cell and the satellite changes due to the change of beam pointing. This is because if the network side plans to adjust the beam pointing in a subsequent time period so as to change the relative position of the first cell and the satellite, the network side can adjust the first information in time according to the plan.
  • the terminal device In the scheme in which the terminal device solves the satellite position in real time based on the ephemeris information and then determines the reference position of the first cell, the terminal device cannot promptly know the beam pointing adjustment that the network side is about to perform, and thus cannot promptly and quickly calculate the reference position of the first cell after the beam pointing changes.
  • the network side solves the reference position of the first cell, it does not need to consider the format of the ephemeris provided to the terminal device. Therefore, the embodiments of the present application can be applied to any ephemeris format.
  • the first information is introduced in detail below.
  • the first information may include a first parameter, such as a parameter of the first model.
  • a first parameter such as a parameter of the first model.
  • the parameter of the first model may refer to a coefficient of the function model.
  • a first model may be pre-stored on the terminal device side. In this way, after the terminal device receives the first information (parameters of the first model), the terminal device can determine the reference position of the first cell at any time in the first time period based on the parameters of the first model and the stored first model.
  • the embodiment of the present application can pre-store the first model for fitting on the terminal device side based on the idea of curve fitting, and the network side estimates the trajectory of the reference position of the first cell (or predicts, and the predictions mentioned later can also be replaced by estimates), and fits the predicted trajectory of the reference position of the first cell, and finally sends the fitting result (for example, the first parameter) to the terminal device, so that the terminal device can obtain the reference position of the first cell at any time in a long period of time, thereby reducing the computing power burden on the terminal device side.
  • the first model may be sent by the base station to the terminal device.
  • the base station sends both the first model and the parameters of the first model to the terminal device through the first information; or the base station sends the first model and the parameters of the first model to the terminal device respectively through different signaling.
  • the first information may be estimated by the base station.
  • the first model and/or the first parameter may be estimated (or fitted, predicted, etc.) by the base station.
  • the first information is obtained by estimating multiple reference positions of the first cell in the second time period.
  • the first model and/or the parameters of the first model can be obtained by estimating multiple reference positions of the first cell in the second time period.
  • the embodiment of the present application can realize the solution of the time-varying reference position of the first cell based on orbit estimation, and can be applied to cell reselection in the earth mobile cell scenario, such as NTN-NTN cell reselection, NTN-TN cell reselection, etc.
  • the time periods indicated by the first time period and the second time period may be the same.
  • the time periods indicated by the first time period and the second time period may also be different.
  • the time period indicated by the second time period may be earlier than the time period indicated by the first time period.
  • the second time period and the first time period have the same starting point, but different durations, for example, the duration of the time period indicated by the second time period is shorter than the duration of the time period indicated by the first time period.
  • the multiple reference positions of the first cell in the second time period may refer to multiple discrete reference positions of the first cell in the second time period.
  • the embodiment of the present application does not specifically limit the method for obtaining the multiple reference positions of the first cell in the second time period.
  • the multiple reference positions of the first cell in the second time period may be obtained based on one or more of the following information: multiple position information of the satellite in the second time period; the relative position relationship between the first cell and the satellite; and the multiple reference positions of the first cell in the second time period provided by the first device.
  • the first device mentioned in the embodiments of the present application refers to any device that can obtain the location information and beam pointing information of the satellite.
  • the first device may refer to a satellite; or the first device may refer to a beam management module or a beam management system on the network side.
  • the multiple reference positions of the first cell in the second time period may be obtained based on the multiple position information of the satellite in the second time period and the relative position relationship between the first cell and the satellite.
  • the base station may obtain the multiple position information of the satellite in the second time period and the relative position relationship between the satellite and the first cell when the satellite is at each position, based on which the base station may calculate the multiple reference positions of the first cell in the second time period.
  • the multiple reference positions of the first cell in the second time period may be directly provided to the base station by the first device (eg, a satellite, a beam management module, etc.).
  • the first device eg, a satellite, a beam management module, etc.
  • the fitting result of the reference position of the first cell in the embodiment of the present application may be a time function of the coordinates of the reference position of the first cell.
  • the fitting result of the reference position of the first cell can be understood as the first model mentioned above, wherein a1 , a2 ... b1 , b2 ... c1 , c2 ... can be understood as parameters of the first model. That is, in some embodiments, the first information can include the values of a1 , a2 ... b1 , b2 ... c1 , c2 ...
  • the embodiment of the present application does not specifically limit the manner of fitting multiple reference positions of the first cell in the second time period to obtain the first information (e.g., parameters of the first model).
  • the embodiment of the present application can use a Chebyshev polynomial fitting algorithm to fit multiple reference positions of the first cell in the second time period to obtain the first information.
  • different orders of Chebyshev polynomial fitting algorithms can be used to fit multiple reference positions of the first cell in the second time period according to specific circumstances.
  • the fitting curves corresponding to the different orders of Chebyshev polynomial fitting algorithms vary, and a suitable order of Chebyshev polynomial fitting algorithm can be selected for fitting to obtain a more accurate fitting result (e.g., the first information).
  • the order of the Chebyshev polynomial fitting algorithm may be determined by the operator according to different working scenarios.
  • the fitting target is the real-time coordinates of the reference position of the first cell, and specifically, see formula (2):
  • n is the order of Chebyshev polynomial; are the Chebyshev polynomial coefficients of the X-coordinate component, the Y-coordinate component, and the Z-coordinate component, respectively, and T is the Chebyshev polynomial matrix.
  • T is the Chebyshev polynomial matrix.
  • the Chebyshev polynomial matrix T and the coefficient matrix C are expressed as formula (3):
  • the value of m is the number of multiple reference positions of the first cell in the second time period used during fitting.
  • the value of the matrix C can be obtained by the following formula (4), that is, the fitting process using the Chebyshev polynomial fitting algorithm only involves solving the following matrix equation.
  • T T TC T T x (4)
  • the embodiment of the present application does not specifically limit the method for solving the matrix equation.
  • the inverse matrix can be directly calculated to obtain C as shown in the following equation (5); or, other algorithms such as LU decomposition can be used to further reduce the time for solving C.
  • C (T T T) -1 T T x (5)
  • the fitting method using the Chebyshev polynomial fitting algorithm is relatively simple and has low computing power consumption, thereby reducing the computing power burden of solving the reference position of the first cell on the network side.
  • the embodiments of the present application may also use other fitting algorithms to fit multiple reference positions of the first cell in the second time period.
  • Lagrange polynomial interpolation method may be used to fit multiple reference positions of the first cell in the second time period.
  • a method for fitting multiple reference positions of the first cell in the second time period may be selected based on one or more of the following factors: the orbit of the satellite, and the ephemeris format corresponding to the satellite.
  • the fitting method may be selected based on one or more of the above factors. For example, based on the orbit of the satellite, it may be selected to use Chebyshev polynomials or Lagrange polynomial interpolation for fitting, or it may be selected to use a specific Chebyshev polynomial of a certain order based on the orbit of the satellite.
  • the satellites and accuracy requirements are different, and the selected first model and algorithm may be different.
  • Chebyshev polynomials of different orders may be selected to fit the reference position of the first cell.
  • the embodiment of the present application is not limited to this.
  • the updating of the first information is triggered based on a condition.
  • the base station can trigger the updating of the first information based on the condition and resend the updated first information to the terminal device.
  • the conditions for triggering the update of the first information may include multiple conditions, which are not limited in the embodiments of the present application.
  • the conditions for triggering the update of the first information may include one or more of the following: update of the ephemeris; change in the relative position relationship between the first cell and the satellite; and change in the reference position of the first cell.
  • the ephemeris update may update the accuracy of the satellite position, thereby affecting the accuracy of the first information. Therefore, triggering the update of the first information when the ephemeris is updated can ensure the accuracy of the satellite position, thereby ensuring the accuracy of the first information.
  • the change in the relative position relationship between the first cell and the satellite may refer to a new relative position relationship between the first cell and the satellite. In some embodiments, the change in the relative position relationship between the first cell and the satellite may refer to a change in the given relative position relationship between the first cell and the satellite.
  • the conditions for triggering the update of the first information may include: updating of the ephemeris, and/or, changing the relative position relationship between the first cell and the satellite.
  • the conditions for triggering the update of the first information may include: updating the ephemeris.
  • the condition for triggering the first information update may include: the reference position of the first cell changes.
  • the reference position change of the first cell may refer to the first device providing a new reference position of the first cell.
  • the first information may be carried in system information, such as a master information block (MIB) or a system information block (SIB).
  • MIB master information block
  • SIB system information block
  • the embodiment of the present application does not specifically limit the type of SIB that carries the first information.
  • the first information may be carried in SIB 19.
  • SIB 19 may include a field (e.g., a cellReferenceTrail field), and the content of the field is the first information, such as the parameters of the first model.
  • the terminal device can determine the continuous reference position of the first cell in the first time period by obtaining the field in SIB 19.
  • the field carrying the first information may be stored in the system information in the form of multiple single-precision floating-point numbers, the format of which is shown below.
  • the embodiments of the present application are not limited thereto.
  • the field carrying the first information may be set to a fixed-point number or an integer with a specific step length according to the satellite orbit characteristics.
  • the field carrying the first information may also be stored in the system information in the form of a fixed-point number or an integer with a specific step length to save space and improve performance.
  • SIB 19 may carry other information in addition to the first information.
  • the fields of SIB 19 include but are not limited to: ephemeris information (EphemerisInfo), cell reference trajectory parameters (cellReferenceTrail, which may be used to carry the first information). information), epoch time (epochTime), information block validity period (ntn-UlSyncValidityDuration), and distance threshold for cell reselection (distanceThresh).
  • epochTime can be given by the system frame number (SFN) and the subframe number (SubFrameNR), where SFN is the system frame number of the base station and SubFrameNR is the subframe number. Both represent the start time of a downlink subframe and can be reused to indicate the reference time of the NTN auxiliary information block.
  • ntn-UlSyncValidityDuration refers to the duration for which each information in the NTN auxiliary information block remains reliable, which is determined based on the effective time of all information in the system information block, and is not limited to the effective time of the ephemeris information.
  • SIB 19 takes the system information as SIB 19 as an example to provide an example of SIB 19 including the first information, mainly used to exemplarily introduce the NTN related fields included in SIB 19.
  • the information elements (IE) included in NTN-Config are as follows.
  • the embodiment of the present application adds a field that carries the first information in the system information (e.g., SIB 19), so that the terminal device can solve the time-varying reference position of the first cell with a lower computing power burden.
  • the terminal device can also make a trigger decision for cell reselection based on the solved reference position of the first cell.
  • the first information in the embodiment of the present application has a longer validity period and does not require high-frequency updates, which can effectively solve the cell reselection problem in the earth mobile cell scenario, such as the NTN-NTN cell reselection problem, the NTN-TN cell reselection problem, etc.
  • the terminal device obtains the reference position of the first cell to trigger cell selection/reselection.
  • the following takes the example of the terminal device obtaining the reference position of the first cell to trigger cell reselection to introduce the process after the terminal device receives the first information.
  • Fig. 7 is a schematic flow chart of a wireless communication method provided by another embodiment of the present application.
  • the method shown in Fig. 7 includes step S710 and step S720.
  • step S710 the terminal device receives first information.
  • step S710 For the relevant introduction of step S710, please refer to the detailed introduction of step S610 and the first information in the previous text. For the sake of brevity, it will not be repeated here.
  • step S720 the terminal device determines whether to enable the measurement of cells of the same level or lower level according to the first information.
  • the measurement of cells of the same level or lower level is used for cell reselection.
  • the start of the cell measurement of the same level or lower level is based on time triggering. For example, when the terminal device is stationary or moving at a low speed (relative to the movement of the satellite, the low speed movement of the terminal device can be regarded as a stationary state), the start of the cell measurement can be based on time triggering.
  • the start time of the measurement of the cell of the same level or lower level (or the time of starting the measurement of the cell of the same level or lower level) is determined according to the first information and the distance threshold for triggering cell reselection.
  • the terminal device may not start measurement of cells of the same level or lower level.
  • the terminal device may start measurement of cells of the same level or lower level.
  • the time to start the cell measurement can be indicated by a first timer.
  • the start-up rules for measurements for cell reselection may include one or more of the following: (1) the terminal device sets a first timer according to the start-up time of the cell reselection measurement (e.g., t reselect ) and the time when the start-up time of the cell reselection measurement is parsed (e.g., t0), and the first timer is used to indicate the time to start the cell measurement; (2) regardless of the situation, the terminal device side always starts the measurement of high-level cells; (3) if the signal strength of the source cell on the terminal device side is lower than the threshold or the first timer expires, the terminal device side starts the measurement of the same level or lower level cells.
  • the terminal device may not perform intra-frequency measurement
  • the terminal device shall perform intra-frequency measurements
  • the terminal device may not perform intra-frequency measurements
  • the end device shall perform intra-frequency measurements.
  • Srxlev indicates the cell selection reception level value.
  • SIntraSearchP indicates the Srxlev threshold used for NR inter-frequency or inter-RAT frequency measurement.
  • Squal represents the received signal quality value for cell selection.
  • SIntraSearchQ represents the Squal threshold for NR inter-frequency or inter-RAT frequency measurement.
  • cell measurements at the same level or lower level may include one or more of the following: inter-frequency cell measurements (e.g., NR inter-frequency measurements), and inter-radio access technology (RAT) frequency measurements.
  • inter-frequency cell measurements e.g., NR inter-frequency measurements
  • RAT inter-radio access technology
  • the terminal device may apply the following measurement rules for NR inter-frequencies and inter-RAT frequencies indicated in the system information and supported by the terminal device.
  • the terminal device shall perform measurements of the higher priority inter-NR frequency or inter-RAT frequency.
  • the terminal device may choose not to perform measurements of NR inter-frequency cells of equal or lower priority or inter-RAT frequency cells of lower priority;
  • the terminal device shall perform measurements on inter-frequency cells of the same or lower priority as NR or on inter-RAT frequency cells of lower priority;
  • the terminal device may choose not to perform measurements of NR inter-frequency cells of equal or lower priority or inter-RAT frequency cells of lower priority;
  • the terminal device shall perform measurements on NR inter-frequency cells of equal or lower priority or on inter-RAT frequency cells of lower priority.
  • the terminal device can obtain the trajectory information of the reference position of the first cell based on the first information, thereby obtaining a function of the distance between the terminal device and the first cell over time, and then the terminal device predicts the start time of the cell measurement of the same level/lower level for cell reselection through an iterative solution of a transcendental equation, and transforms the cell reselection triggered by the distance threshold into the cell reselection triggered by time, thereby simplifying the triggering process of the cell reselection.
  • the first timer can be used to determine the start time of the cell measurement, thereby further simplifying the triggering process of the cell reselection.
  • the activation of the cell measurement of the same level or lower level is based on distance triggering.
  • the activation of the cell measurement can be based on distance triggering.
  • the terminal device can parse (for example, periodically parse) the current reference position of the first cell based on the first information, and calculate the distance between the current terminal device and the reference position of the first cell based on the position information of the terminal device. If the distance exceeds the distance threshold for triggering cell reselection and the terminal device is in an idle state/inactive state, the terminal device starts the same level/lower level cell measurement for cell reselection.
  • the measurement start-up rules based on distance triggering are similar to the measurement start-up rules based on time triggering, but the method of using the first timer to determine whether the start time has arrived needs to be modified to be based on whether the current distance between the terminal device and the reference position of the first cell exceeds the distance threshold for triggering cell reselection.
  • the method shown in Fig. 7 may further include step S730.
  • step S730 the terminal device starts a second timer, and the second timer is used to indicate the validity time of the first information.
  • the valid time indicated by the second timer is determined comprehensively based on the valid time of all information in the system information, for example, it can be the minimum value of the valid time of all information in the system information.
  • the terminal device before or when the second timer ends, the terminal device needs to send a first request message to the network side to request new first information.
  • the terminal device can start a second timer (e.g., timer T430) according to the information block epoch time and the information block validity time.
  • a second timer e.g., timer T430
  • the start time of the second timer is the epoch time indicated by the information block
  • the duration of the second timer is the information block validity time.
  • the epoch time indicated by the information block is usually earlier than the current moment.
  • the time difference between the epoch time indicated by the information block and the current moment can be calculated to set the second timer.
  • the information block epoch time and the information block validity time may be sent to the terminal device by the network side through system information.
  • the information block epoch time and the information block validity time may be carried in SIB 19.
  • the terminal device before or after the second timer ends, after the terminal device sends the first request message to the network side, if the first information or ephemeris information is different from the last obtained, the terminal device needs to re-determine whether to trigger cell measurement for cell reselection; If the first information and the ephemeris information are the same as those obtained last time, the terminal device does not need to perform other steps related to cell reselection.
  • the terminal device needs to parse the start time of the cell reselection measurement based on the new first information and the distance threshold for triggering cell reselection.
  • the terminal device needs to terminate the first timer and start a new first timer based on the recalculated start time of the cell reselection measurement.
  • the terminal device starts the same level/lower level cell measurement for cell reselection.
  • the terminal device needs to solve (for example, periodically solve) the reference position of the first cell based on the new first information (for example, the moment when the new first information is received can be the starting point of the first time period); if the distance between the terminal device and the reference position of the first cell is greater than the distance threshold for triggering cell reselection, and the terminal device is in an idle state/inactive state, the terminal device starts the same level/lower level cell measurement for cell reselection.
  • the size of the calculation period can be reasonably set according to factors such as the size of the first cell and the moving speed of the satellite.
  • step S720 may be executed first, or step S730 may be executed first, or step S720 and step S730 may be executed simultaneously.
  • the overall process on the network side (eg, base station) and the terminal device side will be exemplarily introduced below in conjunction with FIG. 8 and FIG. 9 .
  • Figure 8 shows the overall process on the network side.
  • the network side mainly completes one or more of the following processes: (1) analyzing the satellite's own trajectory; (2) solving/predicting the trajectory of the reference position of the first cell; (3) fitting the trajectory of the reference position of the first cell; (4) sending the fitting result as the first information to the terminal device.
  • the network side may omit the process of analyzing the satellite's own trajectory. For example, in a scenario where the reference position of the first cell is provided by the first device, the network side does not need to analyze the satellite's own trajectory.
  • the network side can predict the trajectory of the reference position of the first cell in a subsequent period of time (e.g., the first time period) based on discrete satellite position information in a period of time (e.g., the second time period) and the relative position relationship between the first cell and the satellite.
  • the network side may have one or more of the following capabilities to complete the determination of the first information.
  • the network side can be equipped with a corresponding satellite observation system, for example, the ground is equipped with a corresponding satellite observation system.
  • the satellite observation system has basic satellite observation and trajectory prediction capabilities.
  • the observation and trajectory prediction results obtained by the satellite observation system can be sent to the NTN network device in the form of ephemeris.
  • the ephemeris may contain sufficient information to enable the network side to obtain the satellite positions at present and in the next period of time.
  • the satellite observation system may update the ephemeris information at a certain period to ensure the accuracy of the satellite positions obtained by the network side.
  • the network side may have the capability to obtain the reference position of the current first cell and predict the movement trajectory of the reference position of the first cell in a subsequent period of time.
  • Capability 3 If the network side predicts the reference position of the first cell based on the position information of the satellite and the relative position relationship between the first cell and the satellite, the network side may have basic ephemeris parsing capability and be able to perform trajectory prediction based on the ephemeris.
  • the network side should be able to predict the satellite position based on a simple celestial motion model (or by other means).
  • the network side may also be configured with ephemeris in other formats, or other methods for obtaining the position of the satellite in a subsequent period of time, or the satellite position that has been solved in other processes on the network side may be reused.
  • Figure 9 shows the overall process on the terminal device side.
  • the process of the terminal device mainly includes obtaining first information and determining whether to start cell reselection measurement based on the first information.
  • the terminal device can calculate the time to start cell measurement based on the first information and the distance threshold of cell reselection, so as to start the measurement of cells of the same level/lower level when the time arrives.
  • the terminal device can calculate the reference position of the first cell based on the first information, and determine whether to trigger cell reselection (i.e., open level/low level cell measurement) based on the reference position of the first cell and the distance threshold of cell reselection.
  • cell reselection i.e., open level/low level cell measurement
  • Embodiment 1 The network side determines the reference position of the first cell based on the ephemeris information
  • Embodiment 1 mainly introduces the main processing flow on the network side and the terminal device side when conventional ephemeris information based on orbital parameters is used and satellite positions calculated by other processes on the network side are not reused.
  • the network side receives ephemeris information from the satellite observation system and predicts satellite trajectories.
  • the ephemeris information of the satellite observation system can be provided in the format of Table 2 (the ephemeris format shown in Table 2 refers to the GPS broadcast ephemeris), and the ephemeris information can be provided periodically.
  • the network side can predict the satellite trajectory within a period of time (the specific duration can be determined according to the satellite orbit type, ephemeris accuracy, etc.) based on the simple celestial motion model and the correction items in the ephemeris.
  • the following steps are used to predict the satellite position within 20 minutes, and the satellite position corresponding to 20 moments is predicted in total. It should be noted that if the more concise ephemeris in TR38.821 is used, there is no need to calculate the correction items in the following steps.
  • GM is the gravitational constant of the earth.
  • the time scale used can still be the seconds in the GPS week.
  • the network side obtains the reference position of the first cell based on the satellite position and beam pointing
  • the schematic diagram of the relative position of the first cell and the satellite can be seen in FIG10.
  • the Y axis of the coordinate system points to the due north direction
  • the positive direction of the X axis points to the due east direction
  • the reference position of the first cell (corresponding to the center position of the first cell) is a point on the ground
  • the relative position of the first cell and the satellite can be represented by ⁇ atenna and ⁇ atenna , where ⁇ atenna is the angle between the line "reference position of the first cell-satellite” and the direction perpendicular to the center of the earth by the satellite, and ⁇ atenna is the angle between the line "sub-satellite point-reference position of the first cell" and the due north direction.
  • ⁇ atenna and ⁇ atenna are both 0, so the reference position of the first cell is the sub-satellite point of the satellite.
  • the orbital eccentricity of the reference position of the first cell solved in the first embodiment is low and close to a perfect circle. Therefore, (Xc k Yc k Zc k ) changes gently along time, and the curve is close to a straight line.
  • a low-order Chebyshev polynomial for example, a 4th-order Chebyshev polynomial
  • the polynomial forms and parameters of each order are shown in Table 5.
  • the network side determines the first information
  • the first information may be carried in, for example, the cellReferenceTrail field of SIB 19.
  • the format design of cellReferenceTrail may be as follows.
  • the terminal device requests the first information from the network side
  • the terminal device can request the network device to obtain SIB 19 and parse it to obtain information including but not limited to Table 7.
  • the terminal device can start the valid time timer T430 corresponding to SIB 19.
  • the terminal device can set a timer that starts at the time corresponding to the epoch time and lasts for a time corresponding to the valid time of the information block according to two parameters: the epoch time and the valid time of the information block.
  • the terminal device calculates the measurement start time of the cell reselection and sets the first timer T440 through the following steps (1) to (5).
  • Step (1) The terminal device converts the current time into GPS time
  • the current time may be converted to the Julian day first, and then the Julian day may be converted to the GPS time.
  • Step (2) Obtain the reference position of the first cell
  • the terminal device uses the GPS time t corresponding to the current time as a variable, and obtains the complete and continuous reference position trajectory of the first cell according to the first information as shown in the following formula.
  • Step (3) Calculate the measurement start time for cell reselection
  • the terminal device can solve the possible start time t reselect of cell reselection by iteratively solving the transcendental equation.
  • Xu , Yu , and Zu are the coordinates of the terminal device in the ECEF coordinate system.
  • the position of the terminal device if the position of the terminal device is given in the format of longitude and latitude, the position of the terminal device can be converted into the value of the ECEF rectangular coordinate system using the geodetic ellipsoid.
  • an iterative algorithm e.g., bisection method, Newton's method, optimization algorithm, etc.
  • the distance threshold d thresh for cell reselection is set to 10km, and the specific value of t reselect -t oe is solved to be 11.41s. Therefore, after 11.41 seconds from 8:00 on December 9, 2022, the same level or lower level cell reselection measurement can be considered.
  • the terminal device needs to set the first timer T440 according to the current time t0 and t reselect after this value is solved.
  • the start time of T440 is t0 and the duration is t reselect -t 0 .
  • Step (4) If the terminal device is in an idle state/inactive state, perform cell reselection measurements according to the conditions
  • the terminal device always starts measuring the high-level cells.
  • the terminal device starts The measurement of cells of the same level or lower level is started, as described in detail below.
  • the terminal device may not perform intra-frequency measurement
  • the terminal device shall perform intra-frequency measurements
  • the terminal device may not perform intra-frequency measurements
  • the end device shall perform intra-frequency measurements.
  • the terminal device shall apply the following rules for the NR inter-frequencies and inter-RAT frequencies indicated in the system information and supported by the UE:
  • the terminal device shall perform measurements of the higher priority inter-NR frequency or inter-RAT frequency.
  • the terminal may choose not to perform measurements of NR inter-frequency cells of equal or lower priority or inter-RAT frequency cells of lower priority;
  • the UE shall perform measurements on inter-frequency cells of the same or lower priority as the NR or on inter-RAT frequency cells of lower priority;
  • the UE may choose not to perform measurements on NR inter-frequency cells of equal or lower priority or inter-RAT frequency cells of lower priority;
  • the UE shall perform measurements on NR inter-frequency cells of equal or lower priority or on inter-RAT frequency cells of lower priority.
  • Step (5) The second timer is about to end, and the process returns to step (1).
  • the terminal device When the second timer (eg, T430 timer) is about to end, the terminal device requests the network side to update the corresponding first information again and returns to execute step (1).
  • the second timer eg, T430 timer
  • Embodiment 2 The network side determines the reference position of the first cell by other means
  • Embodiment 2 mainly introduces the main processing flow on the network side and the terminal device side when the reference position of the first cell is not estimated based on the ephemeris. It should be noted that the satellite orbit in Embodiment 2 is the same as that in Embodiment 1. For the sake of brevity, Embodiment 2 will not be described in detail. It should also be noted that in Embodiment 2, the reference position of the first cell is located at the non-sub-satellite point of the satellite.
  • the network side fits the curve of the reference position of the first cell changing with time
  • the network side may use the reference position of the first cell provided by the first device to provide 20 reference positions (Xc k Yc k Zc k ) of the first cell in the WSG84 coordinate system.
  • the orbital eccentricity of the reference position of the first cell solved in the second embodiment is low and close to a perfect circle. Therefore, (Xc k Yc k Zc k ) changes gently along time, and the curve is close to a straight line.
  • a low-order Chebyshev polynomial for example, a 4th-order Chebyshev polynomial
  • the polynomial forms and parameters of each order are shown in Table 8.
  • the fitting result obtained by fitting the coordinates in the three directions using the time coordinate t cell tt oe in minutes, and the errors in the three directions are all below 0.05 meters, indicating that when the beam points to a non-sub-satellite point, the curve changes smoothly, and the scheme can still fit the trajectory well, and can still solve the reference position of the first cell with high accuracy (it should be noted that the above error is only a fitting error, and in practice, the error of the satellite trajectory itself obtained by the network side may also need to be considered).
  • the default t oe may be given by the ephemeris. In some embodiments, if there is no ephemeris or other parameters to indicate to the terminal device In order to indicate the fitting reference time t oe , it may be considered to reuse the epoch time field in SIB 19 to indicate t oe .
  • the network side determines the first information
  • the first information may be carried in, for example, the cellReferenceTrail field of SIB 19.
  • the format design of cellReferenceTrail may be as follows.
  • the terminal device requests the first information from the network side
  • the terminal device can request the network device to obtain SIB 19 and parse it to obtain information including but not limited to Table 10.
  • the terminal device can start the valid time timer T430 corresponding to SIB 19.
  • the terminal device can set a timer that starts at the time corresponding to the epoch time and lasts for a time corresponding to the valid time of the information block according to two parameters: the epoch time and the valid time of the information block.
  • the terminal device calculates the measurement start time of the cell reselection and sets the first timer T440 through the following steps (1) to (5).
  • Step (1) The terminal device converts the current time into the Julian day
  • JulianDay (fix(365.25*(year))+fix(30.6001*(month+13))+day+(hour+min/60+second/3600)/24+1720981.5)/60.
  • the current time may be converted to the Julian day first, and then the Julian day may be converted to the GPS time.
  • the terminal device may also convert the current time to the Julian day without converting it to the GPS time.
  • Step (2) Obtain the reference position of the first cell
  • the terminal device uses t oe as the reference starting time and obtains the trajectory of the reference position of the complete and continuous first cell according to the first information as shown in the following formula.
  • Step (3) Calculate the measurement start time for cell reselection
  • the terminal device can solve the possible start time t reselect of cell reselection by iteratively solving the transcendental equation.
  • step (1) the terminal device has converted the current time t into the Julian day, and takes t oe (8:00 on December 9, 2022) as the starting point and sets the time axis t in minutes, and brings it into the first model to obtain the cell center reference positions XC k , YC k , and ZC k .
  • Xu , Yu , and Zu are the coordinates of the terminal device in the ECEF coordinate system.
  • the position of the terminal device if the position of the terminal device is given in the format of longitude and latitude, the position of the terminal device can be converted into the value of the ECEF rectangular coordinate system using the geodetic ellipsoid.
  • the embodiments of the present application do not specifically limit the method for solving the above transcendental equation.
  • an iterative algorithm e.g., bisection method, Newton's method, optimization algorithm, etc.
  • the distance threshold d thresh for cell reselection is set to 10km, and the specific value of t reselect -t oe is solved to be 12.37s. Therefore, 12.37 seconds after 8:00 on December 9, 2022, the same level or lower level cell reselection measurement can be considered.
  • the terminal device needs to set the first timer T440 according to the current time t0 and t reselect after this value is solved.
  • the start time of T440 is t0 and the duration is t reselect -t 0 .
  • Step (4) If the terminal device is in an idle state/inactive state, perform cell reselection measurements according to the conditions
  • the terminal device always starts measuring the high-level cells.
  • the terminal device if the signal strength of the source cell of the terminal device is lower than a threshold or the first timer T440 ends, the terminal device starts measuring cells of the same level or lower level, as described in detail below.
  • the terminal device may not perform intra-frequency measurement
  • the terminal device shall perform intra-frequency measurements
  • the terminal device may not perform intra-frequency measurements
  • the end device shall perform intra-frequency measurements.
  • the terminal device shall apply the following rules for the NR inter-frequencies and inter-RAT frequencies indicated in the system information and supported by the UE:
  • the terminal device shall perform measurements of the higher priority inter-NR frequency or inter-RAT frequency.
  • the terminal may choose not to perform measurements of NR inter-frequency cells of equal or lower priority or inter-RAT frequency cells of lower priority;
  • the UE shall perform measurements on inter-frequency cells of the same or lower priority as the NR or on inter-RAT frequency cells of lower priority;
  • the UE may choose not to perform measurements on NR inter-frequency cells of equal or lower priority or inter-RAT frequency cells of lower priority;
  • the UE shall perform measurements on NR inter-frequency cells of equal or lower priority or on inter-RAT frequency cells of lower priority.
  • Step (5) The second timer is about to end, and the process returns to step (1).
  • the terminal device When the second timer (eg, T430 timer) is about to end, the terminal device requests the network side to update the corresponding first information again and returns to execute step (1).
  • the second timer eg, T430 timer
  • Example 3 Determining the reference position of a LEO dynamic cell
  • Embodiments 1 and 2 are mainly for GEO satellites, while Embodiment 3 is mainly for LEO satellites.
  • Embodiment 3 mainly introduces the main processing flow on the network side and the terminal device side when the beam changes dynamically under LEO satellites.
  • the satellite orbit in Embodiment 3 is the same as that in Embodiment 1.
  • Embodiment 3 will not be described in detail.
  • some steps of Embodiment 3 are different from those in the implementation.
  • Example 1 is the same as Example 2, so for the parts of Example 3 that are not described in detail, please refer to the previous Example 1 or Example 2.
  • the ephemeris information of the satellite observation system can be given in any format.
  • the network side can directly obtain the satellite trajectory, or obtain the position of the satellite at any time within a period of time based on the ephemeris information.
  • the network side predicts the satellite positions corresponding to the next 20 moments (for example, at intervals of 15 seconds), and the time standard used at this time can be the Julian day or GPS time.
  • the starting time of the 20 moments is t oe
  • t oe can be given by the ephemeris or other means.
  • the network side fits the curve of the reference position of the first cell changing with time
  • the direction of the beam corresponding to the first cell can be represented by ⁇ atenna and ⁇ atenna .
  • the values of ⁇ atenna and ⁇ atenna are respectively time-varying functions ⁇ atenna (t) and ⁇ atenna (t).
  • the network side can solve the reference positions (Xc k Yc k Zc k ) of 20 first cells in the WSG84 coordinate system according to the satellite positions and ⁇ atenna (t) and ⁇ atenna (t).
  • the reference positions of the 20 first cells are calculated by the network side according to the satellite positions.
  • the reference positions of the 20 first cells are directly provided by the first device.
  • the reference positions of the 20 first cells can still be fitted using a polynomial fitting algorithm.
  • a polynomial fitting algorithm For example, a 5th-order Chebyshev polynomial can be used as the first model. Taking the 5th-order Chebyshev polynomial for fitting as an example, the polynomial forms and parameters of each order are shown in Table 11.
  • Example 3 the specific values of the above parameters can be seen in Table 12.
  • the errors in the three directions are all below 0.1 meters, indicating that when the beam pointing changes dynamically, the embodiment of the present application is also capable of fitting the trajectory of the reference position of the first cell, so that the terminal device can calculate the reference position of the first cell with higher accuracy (it should be noted that the above error is only a fitting error, and in practice it may also be necessary to consider the error of the satellite trajectory itself obtained by the network side).
  • the main process on the subsequent terminal device side is the same as that in the first or second embodiment, and will not be repeated here for the sake of brevity.
  • FIG11 is a schematic diagram of the structure of a wireless communication device provided in an embodiment of the present application.
  • the wireless communication device 1100 shown in FIG11 may be a terminal device, and the wireless communication device 1100 includes a receiving module 1110 .
  • the receiving module 1110 may be configured to receive first information, where the first information is used to indicate continuous reference positions of a first cell in a first time period, and the coverage of the first cell changes with the movement of the satellite.
  • the first information includes a first parameter, and the first parameter is used to determine trajectory information of a reference position of the first cell.
  • the first information is obtained by estimating multiple reference positions of the first cell in a second time period.
  • the multiple reference positions of the first cell in the second time period are obtained based on one or more of the following information: multiple position information of the satellite in the second time period; the relative position relationship between the first cell and the satellite; and multiple reference positions of the first cell in the second time period provided by the first device.
  • the first information is estimated by a base station.
  • the update of the first information is triggered based on conditions, and the conditions triggering the update of the first information include one or more of the following: update of the ephemeris; change in the relative position relationship between the first cell and the satellite; and change in the reference position of the first cell.
  • the wireless communication apparatus 1100 further includes: a determination module 1120, configured to determine whether to enable same-level or lower-level cell measurement according to the first information, wherein the same-level or lower-level cell measurement is used for cell reselection.
  • the cell measurement is enabled based on time triggering.
  • the time for starting the cell measurement is determined according to the first information and a distance threshold for triggering cell reselection.
  • the terminal device determines whether to start cell measurement of the same level or lower level based on the first information, including: if the time for starting the cell measurement determined by the terminal device according to the first information has not arrived, the terminal device does not start the cell measurement of the same level or lower level; and/or if the time for starting the cell measurement determined by the terminal device according to the first information has arrived, the terminal device starts the cell measurement of the same level or lower level.
  • the time for starting the cell measurement is indicated by a first timer.
  • the enabling of the cell measurement is triggered based on distance.
  • the wireless communication device 1100 further includes: a starting module, configured to start a second timer, wherein the second timer is configured to indicate a valid time of the first information.
  • the wireless communication device 1100 further includes: a sending module, configured to send a first request message, where the first request message is used to obtain the first information.
  • a sending module configured to send a first request message, where the first request message is used to obtain the first information.
  • the first information is carried in system information.
  • the receiving module 1110 may be a transceiver 1330.
  • the wireless communication device 1100 may further include a processor 1310 and a memory 1320, as specifically shown in FIG13 .
  • FIG12 is a schematic diagram of the structure of a wireless communication device provided in another embodiment of the present application.
  • the wireless communication device 1200 shown in FIG12 may be a base station, and the wireless communication device 1200 includes a sending module 1210 .
  • the sending module 1210 may be configured to send first information, where the first information is used to indicate continuous reference positions of a first cell in a first time period, and the coverage of the first cell changes with the movement of the satellite.
  • the first information includes a first parameter, and the first parameter is used to determine trajectory information of a reference position of the first cell.
  • the first information is obtained by estimating multiple reference positions of the first cell in a second time period.
  • the multiple reference positions of the first cell in the second time period are obtained based on one or more of the following information: multiple position information of the satellite in the second time period; the relative position relationship between the first cell and the satellite; and multiple reference positions of the first cell in the second time period provided by the first device.
  • the first information is estimated by the base station.
  • the update of the first information is triggered based on conditions, and the conditions triggering the update of the first information include one or more of the following: update of the ephemeris; change in the relative position relationship between the first cell and the satellite; and change in the reference position of the first cell.
  • the first information is used by the terminal device to determine whether to enable measurement of cells of the same level or lower level, and the measurement of cells of the same level or lower level is used for cell reselection.
  • the cell measurement is enabled based on time triggering.
  • the time for starting the cell measurement is determined according to the first information and a distance threshold for triggering cell reselection.
  • the time for starting the cell measurement is indicated by a first timer.
  • the enabling of the cell measurement is triggered based on distance.
  • the wireless communication device 1200 further includes: a receiving module 1220, configured to receive a first request message, where the first request message is used to obtain the first information.
  • a receiving module 1220 configured to receive a first request message, where the first request message is used to obtain the first information.
  • the first information is carried in system information.
  • the sending module 1210 may be a transceiver 1330.
  • the base station 1200 may further include a processor 1310 and a memory 1320, as specifically shown in FIG. 13 .
  • FIG13 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the dotted lines in FIG13 indicate that the unit or module is optional.
  • the device 1300 may be used to implement the method described in the above method embodiment.
  • the device 1300 may be a chip, a terminal device, or a network device.
  • the device 1300 may include one or more processors 1310.
  • the processor 1310 may support the device 1300 to implement the method described in the above method embodiment.
  • the processor 1310 may be a general-purpose processor or a special-purpose processor.
  • the processor may be a central processing unit (CPU).
  • the processor may also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), off-the-shelf programmable gate arrays, or a plurality of other processors.
  • Array field programmable gate array, FPGA
  • the general processor can be a microprocessor or the processor can also be any conventional processor, etc.
  • the apparatus 1300 may further include one or more memories 1320.
  • the memory 1320 stores a program, which can be executed by the processor 1310, so that the processor 1310 executes the method described in the above method embodiment.
  • the memory 1320 may be independent of the processor 1310 or integrated in the processor 1310.
  • the apparatus 1300 may further include a transceiver 1330.
  • the processor 1310 may communicate with other devices or chips through the transceiver 1330.
  • the processor 1310 may transmit and receive data with other devices or chips through the transceiver 1330.
  • the present application also provides a computer-readable storage medium for storing a program.
  • the computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.
  • the embodiment of the present application also provides a computer program product.
  • the computer program product includes a program.
  • the computer program product can be applied to the terminal or network device provided in the embodiment of the present application, and the program enables the computer to execute the method performed by the terminal or network device in each embodiment of the present application.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the terminal or network device provided in the embodiment of the present application, and the computer program enables a computer to execute the method executed by the terminal or network device in each embodiment of the present application.
  • the "indication" mentioned can be a direct indication, an indirect indication, or an indication of an association relationship.
  • a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, B can be obtained through C; it can also mean that there is an association relationship between A and B.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean determining B only according to A, and B can also be determined according to A and/or other information.
  • the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship of indication and being indicated, configuration and being configured, etc.
  • pre-definition or “pre-configuration” can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit the specific implementation method.
  • pre-definition can refer to what is defined in the protocol.
  • the “protocol” may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.
  • the term "and/or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships.
  • a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
  • the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.
  • the size of the serial numbers of the above-mentioned processes does not mean the order of execution.
  • the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
  • Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions can be transmitted from a website, a computer, a server or a data center via a wired (e.g., coaxial cable) connection.
  • the computer readable storage medium may be any available medium that can be read by a computer or a data storage device such as a server or a data center that includes one or more available media.
  • the available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital video disc (DVD)), or a semiconductor medium (e.g., a solid state disk (SSD)).

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Abstract

提供了一种无线通信的方法和装置。该方法包括：终端设备接收第一信息，第一信息用于指示第一小区在第一时间段的连续的参考位置，第一小区的覆盖范围随着卫星的移动而变化。本申请实施例中，第一信息能够指示第一小区在第一时间段的连续的参考位置，使得终端设备可以利用第一信息确定第一小区在第一时间段的任一时刻的参考位置。如此一来，在小区的参考位置随着卫星的移动而变化的场景下，本申请实施例不需要高频率更新第一信息便可以确定小区的参考位置，有利于节省信令开销。

Description

无线通信的方法和装置 技术领域
本申请涉及通信技术领域，并且更为具体地，涉及一种无线通信的方法和装置。
背景技术
非地面通信网络(non-terrestrial network，NTN)中，某些小区的覆盖范围会随着卫星的移动而变化，因此，小区的参考位置也会随着卫星的移动而变化。
某些场景下，终端设备可能需要知道小区准确的参考位置，例如，终端设备处于无线资源控制(radio resource control，RRC)空闲态或RRC非激活态时，可能需要知道小区准确的参考位置以触发小区选择/重选。那么，在小区的参考位置随着卫星的移动而变化的场景下，终端设备如何确定小区的参考位置是需要解决的问题。
发明内容
本申请提供一种无线通信的方法和装置。下面对本申请涉及的各个方面进行介绍。
第一方面，提供了一种无线通信的方法，包括：终端设备接收第一信息，所述第一信息用于指示第一小区在第一时间段的连续的参考位置，所述第一小区的覆盖范围随着卫星的移动而变化。
第二方面，提供了一种无线通信的方法，包括：基站发送第一信息，所述第一信息用于指示第一小区在第一时间段的连续的参考位置，所述第一小区的覆盖范围随着卫星的移动而变化。
第三方面，提供了一种无线通信装置，所述无线通信装置为终端设备，所述无线通信装置包括：接收模块，用于接收第一信息，所述第一信息用于指示第一小区在第一时间段的连续的参考位置，所述第一小区的覆盖范围随着卫星的移动而变化。
第四方面，提供了一种无线通信装置，所述无线通信装置为基站，所述无线通信装置包括：发送模块，用于发送第一信息，所述第一信息用于指示第一小区在第一时间段的连续的参考位置，所述第一小区的覆盖范围随着卫星的移动而变化。
第五方面，提供了一种无线通信装置，包括处理器、存储器以及通信接口，所述存储器用于存储一个或多个计算机程序，所述处理器用于调用所述存储器中的计算机程序使得所述无线通信装置执行第一方面至第二方面中的任一方面所述的方法。
第六方面，本申请实施例提供了一种通信系统，该系统包括上述的无线通信装置。在另一种可能的设计中，该系统还可以包括本申请实施例提供的方案中与该无线通信装置进行交互的其他设备。
第七方面，本申请实施例提供了一种装置，包括处理器，用于从存储器中调用程序，以执行第一方面至第二方面中的任一方面所述的方法。
第八方面，本申请实施例提供了一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序，所述计算机程序使得无线通信装置执行上述各个方面的方法中的部分或全部步骤。
第九方面，本申请实施例提供了一种计算机程序产品，其中，所述计算机程序产品包括存储了计算机程序的非瞬时性计算机可读存储介质，所述计算机程序可操作来使无线通信装置执行上述各个方面的方法中的部分或全部步骤。在一些实现方式中，该计算机程序产品可以为一个软件安装包。
第十方面，本申请实施例提供了一种计算机程序，所述计算机程序使得计算机执行上述各个方面的方法中的部分或全部步骤。
第十一方面，本申请实施例提供了一种芯片，该芯片包括存储器和处理器，处理器可以从存储器中调用并运行计算机程序，以实现上述各个方面的方法中所描述的部分或全部步骤。
本申请实施例中，第一信息能够指示第一小区在第一时间段的连续的参考位置，使得终端设备可以利用第一信息确定第一小区在第一时间段的任一时刻的参考位置。如此一来，在小区的参考位置随着卫星的移动而变化的场景下，本申请实施例不需要高频率更新第一信息便可以确定小区的参考位置，有利于节省信令开销。
附图说明
图1A-图1C是可应用本申请实施例的通信系统的系统架构示例图。
图2是可应用本申请实施例的卫星网络架构的示例图。
图3是可应用本申请实施例的另一卫星网络架构的示例图。
图4是可应用本申请实施例的又一卫星网络架构的示例图。
图5是地球移动小区场景的示意图。
图6是本申请实施例提供的无线通信的方法的流程示意图。
图7是本申请另一实施例提供的无线通信的方法的流程示意图。
图8是本申请实施例提供的网络侧的无线通信方法的流程示意图。
图9是本申请实施例提供的终端设备侧的无线通信方法的流程示意图。
图10是本申请实施例提供的第一小区与卫星的相对位置的示意图。
图11是本申请一实施例提供的无线通信装置的结构示意图。
图12是本申请另一实施例提供的无线通信装置的结构示意图。
图13是本申请实施例提供的通信装置的示意性结构图。
具体实施方式
通信系统架构
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(global system of mobile communication，GSM)系统、码分多址(code division multiple access，CDMA)系统、宽带码分多址(wideband code division multiple access，WCDMA)系统、通用分组无线业务(general packet radio service，GPRS)、长期演进(long term evolution，LTE)系统、先进的长期演进(advanced long term evolution，LTE-A)系统、新无线(new radio，NR)系统、NR系统的演进系统、非授权频谱上的LTE(LTE-based access to unlicensed spectrum，LTE-U)系统、非授权频谱上的NR(NR-based access to unlicensed spectrum，NR-U)系统、非地面通信网络(non terrestrial network，NTN)系统、通用移动通信系统(universal mobile telecommunication system，UMTS)、无线局域网(wireless local area networks，WLAN)、无线保真(wireless fidelity，WiFi)、第五代通信(5th-generation，5G)系统或其他通信系统，例如未来的通信系统，如第六代移动通信系统，又如卫星通信系统等。
通常来说，传统的通信系统支持的连接数有限，也易于实现。然而，随着通信技术的发展，移动通信系统将不仅支持传统的通信，还将支持例如，设备到设备(device to device，D2D)通信，机器到机器(machine to machine，M2M)通信，机器类型通信(machine type communication，MTC)，车辆间(vehicle to vehicle，V2V)通信，或车联网(vehicle to everything，V2X)通信等，本申请实施例也可以应用于这些通信系统。
本申请实施例中的通信系统可以应用于载波聚合(carrier aggregation，CA)场景，也可以应用于双连接(dual connectivity，DC)场景，还可以应用于独立(standalone，SA)布网场景。
本申请实施例中的通信系统可以应用于非授权频谱，其中，非授权频谱也可以认为是共享频谱；或者，本申请实施例中的通信系统也可以应用于授权频谱，其中，授权频谱也可以认为是专用频谱。
本申请实施例可应用于NTN系统，也可应用于地面通信网络(terrestrial networks，TN)系统。作为示例而非限定，NTN系统包括基于NR的NTN系统和基于IoT的NTN系统。
本申请实施例结合网络设备和终端设备描述了各个实施例，其中，终端设备也可以称为用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台(mobile station，MS)、移动终端(mobile Terminal，MT)、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置等。
在本申请实施例中，终端设备可以是WLAN中的站点(STATION，ST)，可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)设备、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、下一代通信系统例如NR网络中的终端设备，或者未来演进的公共陆地移动网络(public land mobile network，PLMN)网络中的终端设备等。
在本申请实施例中，终端设备可以是指向用户提供语音和/或数据连通性的设备，可以用于连接人、物和机，例如具有无线连接功能的手持式设备、车载设备等。本申请的实施例中的终端设备可以是手机(mobile phone)、平板电脑(Pad)、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备，虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等。可选地，终端设备可以用于充当基站。例如，终端设备可以充当调度实体，其在V2X或D2D等中的终端设备之间提供侧行链路信号。比如，蜂窝电话和汽车利用侧行链路信号彼此通信。蜂窝电话和智能家居设备之间通信，而无需通过基站中继通信信号。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。
本申请实施例中的网络设备可以是用于与终端设备通信的设备，该网络设备也可以称为接入网设备或无线接入网设备，如网络设备可以是基站。本申请实施例中的网络设备可以是指将终端设备接入到无线网络的无线接入网(radio access network，RAN)节点(或设备)。基站可以广义的覆盖如下中的各种名称，或与如下名称进行替换，比如：节点B(NodeB)、演进型基站(evolved NodeB，eNB)、下一代基站(next generation NodeB，gNB)、中继站、接入点、传输点(transmitting and receiving point，TRP)、发射点(transmitting point，TP)、主站MeNB、辅站SeNB、多制式无线(MSR)节点、家庭基站、网络控制器、接入节点、无线节点、接入点(access piont，AP)、传输节点、收发节点、基带单元(base band unit，BBU)、射频拉远单元(remote radio unit，RRU)、有源天线单元(active antenna unit，AAU)、射频头(remote radio head，RRH)、中心单元(central unit，CU)、分布式单元(distributed unit，DU)、定位节点等。基站可以是宏基站、微基站、中继节点、施主节点或类似物，或其组合。基站还可以指用于设置于前述设备或装置内的通信模块、调制解调器或芯片。基站还可以是移动交换中心以及设备到设备D2D、车辆外联(vehicle-to-everything，V2X)、机器到机器(machine-to-machine，M2M)通信中承担基站功能的设备、6G网络中的网络侧设备、未来的通信系统中承担基站功能的设备等。基站可以支持相同或不同接入技术的网络。本申请的实施例对网络设备所采用的具体技术和具体设备形态不做限定。
基站可以是固定的，也可以是移动的。例如，直升机或无人机可以被配置成充当移动基站，一个或多个小区可以根据该移动基站的位置移动。在其他示例中，直升机或无人机可以被配置成用作与另一基站通信的设备。
在一些部署中，本申请实施例中的网络设备可以是指CU或者DU，或者，网络设备包括CU和DU。gNB还可以包括AAU。
网络设备和终端设备可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上；还可以部署在空中的飞机、气球和卫星上。本申请实施例中对网络设备和终端设备所处的场景不做限定。
作为示例而非限定，在本申请实施例中，网络设备可以具有移动特性，例如网络设备可以为移动的设备。在本申请一些实施例中，网络设备可以为卫星、气球站。例如，卫星可以为低地球轨道(low earth orbit，LEO)卫星、中地球轨道(medium earth orbit，MEO)卫星、地球同步轨道(geostationary earth orbit，GEO)卫星、高椭圆轨道(High Elliptical Orbit，HEO)卫星等。在本申请一些实施例中，网络设备还可以为设置在陆地、水域等位置的基站。
在本申请实施例中，网络设备可以为小区提供服务，终端设备通过该小区使用的传输资源(例如，频域资源，或者说，频谱资源)与网络设备进行通信，该小区可以是网络设备(例如基站)对应的小区，小区可以属于宏基站，也可以属于小小区(small cell)对应的基站，这里的小小区可以包括：城市小区(metro cell)、微小区(micro cell)、微微小区(pico cell)、毫微微小区(femto cell)等，这些小小区具有覆盖范围小、发射功率低的特点，适用于提供高速率的数据传输服务。
示例性地，图1A为本申请实施例提供的一种通信系统的架构示意图。如图1A所示，通信系统100可以包括网络设备110，网络设备110可以是与终端设备120(或称为通信终端、终端)通信的设备。网络设备110可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖区域内的终端设备进行通信。
图1A示例性地示出了一个网络设备和两个终端设备，在本申请一些实施例中，该通信系统100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端设备，本申请实施例对此不做限定。
示例性地，图1B为本申请实施例提供的另一种通信系统的架构示意图。请参见图1B，包括终端设备1101和卫星1102，终端设备1101和卫星1102之间可以进行无线通信。终端设备1101和卫星1102之间所形成的网络还可以称为NTN。在图1B所示的通信系统的架构中，卫星1102可以具有基站的功能，终端设备1101和卫星1102之间可以直接通信。在系统架构下，可以将卫星1102称为网络设备。在本申请一些实施例中，通信系统中可以包括多个网络设备1102，并且每个网络设备1102的覆盖范围内可以包括其它数量的终端设备，本申请实施例对此不做限定。
示例性地，图1C为本申请实施例提供的另一种通信系统的架构示意图。请参见图1C，包括终端设备1201、卫星1202和基站1203，终端设备1201和卫星1202之间可以进行无线通信，卫星1202与基站1203之间可以通信。终端设备1201、卫星1202和基站1203之间所形成的网络还可以称为NTN。在图1C所示的通信系统的架构中，卫星1202可以不具有基站的功能，终端设备1201和基站1203之间的通信需要通过卫星1202的中转。在该种系统架构下，可以将基站1203称为网络设备。在本申请一些实施例中，通信系统中可以包括多个网络设备1203，并且每个网络设备1203的覆盖范围内可以包括其它数量的终端设备，本申请实施例对此不做限定。
需要说明的是，图1A-图1C只是以示例的形式示意本申请所适用的系统，当然，本申请实施例所示的方法还可以适用于其它系统，例如，5G通信系统、LTE通信系统等，本申请实施例对此不作具体限定。
在本申请一些实施例中，图1A-图1C所示的无线通信系统还可以包括移动性管理实体(mobility management entity，MME)、接入与移动性管理功能(access and mobility management function，AMF)等其他网络实体，本申请实施例对此不作限定。
NTN
目前第三代合作伙伴计划(3rd generation partnership project，3GPP)正在研究NTN技术。NTN一般采用卫星通信的方式向地面用户提供通信服务。相比地面通信网络(例如，地面蜂窝网通信)，卫星通信具有很多独特的优点。
首先，卫星通信不受用户地域的限制。例如，一般的地面通信网络不能覆盖海洋、高山、沙漠等无法搭设网络设备的区域。或者，地面通信网络不覆盖某些人口稀少的区域。而对于卫星通信来说，由于一颗卫星可以覆盖较大的地面区域，且卫星可以围绕地球做轨道运动，因此，理论上讲，地球上每一个角落都可以被卫星通信网络所覆盖。
其次，卫星通信有较大的社会价值。卫星通信可以以较低的成本覆盖到边远山区、贫穷落后的国家或地区，从而使这些地区的人们享受到先进的语音通信和移动互联网技术。从这个角度看来，卫星通信有利于缩小与发达地区的数字鸿沟，促进这些地区的发展。
再次，卫星通信距离远的优势，且通信距离的增大并没有明显增加通信的成本。
最后，卫星通信的稳定性高，不受自然灾害的影响。
通信卫星按照轨道高度的不同分为低地球轨道(low earth orbit，LEO)卫星、中地球轨道(medium earth orbit，MEO)卫星、地球同步轨道(geostationary earth orbit，GEO)卫星、高椭圆轨道(high elliptical orbit，HEO)卫星等。目前阶段主要研究的是LEO卫星和GEO卫星。
LEO卫星高度范围一般在500km～1500km。相应地，LEO卫星的轨道周期约为1.5小时～2小时。对于LEO卫星而言，用户间单跳通信的信号传播延迟一般小于20ms。LEO卫星的最大卫星可视时间约为20分钟。LEO卫星具有信号传播距离短，链路损耗少，对用户的终端设备的发射功率要求不高等优点。
GEO卫星的轨道高度为35786km。GEO卫星围绕地球旋转的周期为24小时。对于GEO卫星而言，用户间单跳通信的信号传播延迟一般约为250ms。
为了保证卫星的覆盖以及提升整个卫星通信系统的系统容量，卫星通常采用多波束覆盖地面区域。因此，一颗卫星可以形成几十甚至数百个波束来覆盖地面区域。卫星的一个波束大约可以覆盖直径几十至上百公里的地面区域。
目前，NTN系统包括NR-NTN系统和物联网(internet of things，IoT)-NTN系统。
卫星网络架构
目前3GPP考虑的卫星有两种，一种是透明转发(transparent payload)的卫星，一种是再生转发(regenerative payload)的卫星。下文分别结合图2至图4介绍包含透明转发的卫星的网络架构，以及包含再生转发的卫星的网络架构。
在图2至图4所示的卫星网络架构中，卫星网络架构可以包括终端设备210、卫星节点222和地面接收站221(简称“地面站”)。终端设备210与卫星节点222之间存在无线通信，终端设备210可以通过终端设备210和卫星节点221之间的链路将数据发送至卫星节点221。例如，可以通过服务链路(service link)发送至卫星节点221。相应地，卫星节点221接收到数据之后，可通过卫星节点221与地面接收站222之间的链路发送给地面接收站222。例如，可以通过无线链路(如馈线链路(feeder link))传递给地面接收站221。相应地，地面接收站221接收到卫星节点222的数据之后，将数据传输至核心网(数据网络)，进而通过核心网对数据进行处理，比如与其他终端进行数据交互等等。可以理解的是，此处的服务链路指的是终端设备210和卫星节点222之间的链路，馈线链路指卫星节点222与地面接收站221之间的链路，在其他可能的实施例中，该终端设备和卫星节点之间的链路，和/或，卫星节点 与地面接收站之间的链路还可以用其他的名词表示，本申请不做限定。
上述卫星节点222的类型可以分为三种，第一种卫星节点是仅仅用于转发，即仅具有透明转发功能。在一些实现方式中，此类卫星节点可以只提供无线频率滤波功能、频率转换功能和功率放大功能中的一种或多种。对于这种卫星节点，可以将收到的终端设备信号进行放大，然后发送给地面接收站，终端设备信号在卫星节点上不做任何处理，如图2所示；其中，终端设备与卫星节点之间可通过NR-Uu接口进行通信，卫星节点和地面接收站(如可包括NTN射频拉远单元(remote radio unit，RRU)和gNB)之间可通过NR-Uu接口进行通信，地面接收站和5G核心网(5G CN)之间可通过N1、N2、N3接口进行通信，5G CN和数据网络之间可通过N6接口进行通信。
第二种卫星节点具有完整的基站处理功能，卫星节点对于地面的终端设备来说就是一个基站，卫星节点与终端设备之间的通信与正常的5G通信基本一致，如图3所示。在一些实现方式中，此类卫星节点还可以提供以下功能中的一种或多种：解调功能、解码功能、路由功能、转换功能、编码功能、调制功能。其中，终端设备与卫星节点之间可通过NR-Uu接口进行通信，卫星节点和地面接收站之间可通过卫星无线接口(satellite radio interface，SRI)进行通信，该SRI接口可以用于发送卫星节点与5G CN的接口消息(例如N2、N3接口消息)，地面接收站和5G CN之间可通过N1、N2、N3接口进行通信，5G CN和数据网络之间可通过N6接口进行通信。
第三种卫星节点具有DU的处理功能，卫星节点对于地面的终端设备设备来说就是一个DU，卫星节点与终端设备之间的通信与正常的5G陆地通信系统中终端设备与DU的通信基本一致，如图4所示。其中，终端设备与卫星节点之间可通过NR-Uu接口进行通信，卫星节点和地面接收站(如可包括gNB-CU)之间可通过SRI接口进行通信，该SRI接口可以传输卫星与地面接收站之间的F1接口消息，地面接收站和5G CN之间可通过N1/2/3接口进行通信，5G CN和数据网络之间可通过N6接口进行通信。
在一些实现方式中，NTN小区的覆盖范围可能会随着卫星的移动而变化，导致小区的参考位置也会随着卫星的移动而变化。例如，NTN小区包括地球移动(earth-moving)小区，地球移动小区的覆盖范围会随着卫星的移动而变化，如图5所示，卫星的覆盖区域在T1时刻为A，在T2时刻为B。图5的箭头用于指示卫星的移动方向。
NTN中的小区重选
与传统的地面移动通信系统不同，卫星通信系统具有移动速度快、传播时延长、小区覆盖范围广等特点，因此，传统的地面移动通信技术难以适应卫星通信场景。因此，3GPP在第17版本(release 17，R17)中以原有的5G空口为基础，针对NTN进行了协议增强。在NTN移动性增强方面，R17主要从小区切换、小区选择/重选等方面切入，分析了地面技术应用于NTN时可能会出现的问题和需求，并在R17中提出了一些协议增强方案，但这些方案只能解决部分问题。在R18中，仍需要对NTN的移动性增强方案进行研究，其中，在与NTN小区重选增强相关的提案中，各公司目前的讨论点集中于NTN-TN和NTN-NTN小区重选优化问题上。
小区重选主要发生于RRC空闲态(IDLE)/RRC非激活态(INACTIVE)的终端设备，使终端设备完成从当前服务小区到高质量小区的切换，例如，切换至高级别、同级别或低级别的高质量小区。与RRC连接态(CONNECTED)下的小区切换相比，小区重选主要由终端设备侧完成，网络侧参与较少。
小区重选过程中，终端设备可能需要知道小区准确的参考位置以触发小区重选过程。在TN中，由于地面网络中的小区位置固定，因此终端设备在TN小区中只需获取一次参考位置即可。但在NTN中，有些小区的参考位置会随着卫星的移动而变化，在这种场景下，比如地球移动小区的场景下，小区随卫星高速移动，导致小区的参考位置随着卫星的移动而变化，或者说，小区的参考位置可能是时变的。那么，在小区的参考位置随着卫星的移动而变化的场景下，终端设备如何确定小区的参考位置是需要解决的问题。
作为一种可能的实现方式，网络侧可以直接向终端设备侧提供小区的参考位置。采用这种实现方式时，由于卫星高速运动，小区的参考位置变化频繁，需要网络侧和终端设备频繁地进行信息更新，增加了终端设备侧的通信负担。
作为另一种可能的实现方式，终端设备可以基于星历信息，对卫星位置进行实时解算，并结合小区与卫星的相对位置关系，来获得实时的小区的参考位置。一方面，该方案需要终端设备进行高频率、实时的星历解析，增加了终端设备侧的算力负担。另一方面，该方案不能使用于小区与卫星的相对位置关系非固定的场景。此外，网络侧对于波束管理、卫星位置等信息有着更加便捷全面的理解，而该方案都将小区的参考位置的解算任务交给了终端设备，实际上终端设备难以及时地获知网络侧对卫星、波束等相关信息的改变，导致计算准确性低，及时性差。
针对上述问题，本申请实施例提供一种无线通信的方法和装置，一方面不需要网络侧和终端设备侧 进行频繁的信息更新，另一方面能够降低终端设备侧的算力负担。下面对本申请实施例的技术方案进行详细介绍。
图6为本申请一实施例提供的无线通信的方法的流程示意图。图6所示的方法是站在终端设备和基站交互的角度进行介绍的。该终端设备和基站可以是前文提到的任意类型的终端设备和基站。在一些实施例中，该终端设备可以为处于RRC空闲态或处于RRC非激活态的终端设备。
图6的方法可以包括步骤S610，在步骤S610，基站向终端设备发送第一信息。第一信息可以用于指示(或称，确定)第一小区在第一时间段的连续的参考位置。或者说，第一信息可以用于指示第一小区在一段时间内的连续的参考位置，例如，指示第一小区在一段时间内的多个参考位置。
在一些实施例中，第一信息可以包括第一参数，其中，第一参数可以用于确定(或，指示)第一小区的参考位置的轨迹信息。
在一些实施例中，第一参数可以理解为第一模型的参数，第一模型可以用于指示第一小区的参考位置的轨迹信息。在一些实施例中，第一模型用于指示第一小区的参考位置的轨迹信息可以理解为，第一模型可以用于拟合第一小区的参考位置的轨迹。
在一些实施例中，第一信息可以包括第一模型和第一模型的参数。也就是说，第一信息可以包括第一模型和第一参数。
终端设备获知第一模型和第一参数之后，可以确定第一小区在第一时间段的连续的参考位置。
在一些实施例中，第一信息的发送是基于终端设备的请求进行的。继续参见图6，图6所示的方法还可以包括步骤S605，在步骤S605，终端设备向基站发送第一请求消息。该第一请求消息用于获知第一信息。
关于第一信息的其他详细介绍，可以参见后文的描述，此处暂不赘述。
在一些实施例中，第一小区在第一时间段的连续的参考位置可以是指，第一小区在第一时间段的任一时刻的参考位置。
应该理解，本申请实施例对第一时间段的具体时长不做限定，即第一时间段可以是指任意时长的一段时间，比如，5秒、20秒、1分钟等。
在一些实施例中，第一时间段的时长可以是变化的，例如，基站向终端设备第一次发送的第一信息用于指示第一小区在第一时间段(比如，5秒)的连续的参考位置。之后，基站向终端设备发送更新的第一信息，该更新的第一信息用于指示第一小区在第一时间段(比如，20秒)的连续的参考位置。
本申请实施例对第一时间段的指示方式不做具体限定，例如，第一时间段可以通过起始时间和持续时长来指示，或者，可以通过起始时间和结束时间来指示，又或者，可以通过结束时间和持续时长来指示等。
本申请实施例中，第一小区的覆盖范围随着卫星的移动而变化。在一些实施例中，第一小区可以是指终端设备的服务小区。不过本申请实施例并不限定于此，在一些实施例中，第一小区可以是指终端设备的邻小区。
在一些实施例中，第一小区是指NTN小区，比如，第一小区可以是地球移动小区。
在一些实施例中，第一小区的参考位置(reference location)也可以称为第一小区的参考点或其他类似名称，本申请实施例对此并不限定。
本申请实施例对第一小区的参考位置的设置不做具体限定，示例性地，第一小区的参考位置可以是指第一小区的中心位置。不过本申请实施例并不限定于此，在一些实施例中，第一小区的参考位置也可以是指第一小区的边缘位置，或者第一小区的其他任意位置。
在一些实施例中，第一小区的形状可能为不规则形状，这种情况下，第一小区的参考位置为第一小区的中心位置时，可以是指第一小区的几何中心位置。此外，第一小区的形状为不规则形状时，第一小区的边缘位置可能会对应多个不同的边缘位置，这种情况下，第一小区的边缘位置可以是指距离第一小区的中心位置最近的边缘位置或者最远的边缘位置等。
在一些实施例中，第一小区的参考位置可以是协议预定义或预配置的。在一些实施例中，第一小区的参考位置可以是基站配置的，例如，基站可以通过高层信令或系统信息配置第一小区的参考位置等。
本申请实施例中，第一信息能够指示第一小区在第一时间段的连续的参考位置，使得终端设备可以利用第一信息确定第一小区在第一时间段的任一时刻的参考位置。如此一来，在小区的参考位置随着卫星的移动而变化的场景下，与网络侧直接提供实时的第一小区的参考位置的方案相比，本申请实施例不需要高频率更新第一信息便可以确定小区的参考位置，有利于节省信令开销；与终端设备基于星历信息实时解算卫星位置、进而确定第一小区的参考位置的方案相比，本申请实施例中，终端设备不需要通过解算实时的卫星位置来确定第一小区的参考位置，只需要获知第一信息便可以获取较长一段时间内的任一时刻的第一小区的参考位置，可以降低终端设备侧的算力负担。
此外，本申请实施例的适用性更强。一方面，本申请实施例将第一小区的参考位置的解算搬移至网络侧，可以更好地适用于因波束指向改变导致第一小区与卫星的相对位置发生改变的情况。这是因为，网络侧如果计划在后续的某个时间段调整波束指向从而导致第一小区与卫星的相对位置发生改变，网络侧能够及时根据计划调整第一信息。而终端设备基于星历信息实时解算卫星位置、进而确定第一小区的参考位置的方案中，终端设备无法及时获知网络侧即将执行的波束指向调整，从而无法及时快速地计算波束指向改变后的第一小区的参考位置。另一方面，网络侧解算第一小区的参考位置时，不需要考虑提供给终端设备的星历的格式，因此，本申请实施例可以适用于任意星历格式。
下面对第一信息进行详细介绍。
如前文所述，在一些实施例中，第一信息可以包括第一参数，比如，第一模型的参数。在一些实施例中，第一模型为函数模型(或称，基函数模型、基函数等)时，第一模型的参数可以是指该函数模型的系数。
在一些实施例中，终端设备侧可以预先存储有第一模型。如此一来，终端设备接收第一信息(第一模型的参数)后，终端设备可以基于第一模型的参数和存储的第一模型，确定第一小区在第一时间段的任一时刻的参考位置。也就是说，本申请实施例能够基于曲线拟合的思路，在终端设备侧预先存储拟合用的第一模型，由网络侧进行第一小区的参考位置的轨迹估计(或称，预测，后文提及的预测也都可以替换成估计)，并将预测的第一小区的参考位置的轨迹进行拟合，最后将拟合结果(比如，第一参数)发送给终端设备，以便终端设备可以获取第一小区在较长一段时间内任一时刻的参考位置，降低终端设备侧的算力负担。
在一些实施例中，第一模型可以是基站发送给终端设备的。例如，基站通过第一信息将第一模型和第一模型的参数都发送给终端设备；或者，基站通过不同的信令将第一模型和第一模型的参数分别发送给终端设备。
在一些实施例中，第一信息可以是基站估计得到的。或者说，第一模型和/或第一参数可以是基站估计(或称，拟合、预测等)得到的。
在一些实施例中，第一信息是对第一小区在第二时间段的多个参考位置进行估计得到的。或者说，第一模型和/或第一模型的参数可以是对第一小区在第二时间段的多个参考位置进行估计得到的。如此一来，本申请实施例能够基于轨道估计实现时变的第一小区的参考位置的解算，能够应用于地球移动小区场景中的小区重选，比如NTN-NTN小区重选、NTN-TN小区重选等。
需要说明的是，本申请实施例提及的拟合均可以替换为估计，本申请实施例对此并不限定。
在一些实施例中，第一时间段和第二时间段指示的时间段可以是相同的。
在一些实施例中，第一时间段和第二时间段指示的时间段也可以是不同的。例如，第二时间段指示的时间段可以早于第一时间段指示的时间段。或者，第二时间段与第一时间段指示的时间起点相同，但持续时长不同，比如，第二时间段指示的时间段的持续时长短于第一时间段指示的时间段的持续时长。
在一些实施例中，第一小区在第二时间段的多个参考位置可以是指第一小区在第二时间段的多个离散的参考位置。
本申请实施例对第一小区在第二时间段的多个参考位置的获取方式不做具体限定。示例性地，第一小区在第二时间段的多个参考位置可以是根据以下信息中的一种或多种得到的：卫星在第二时间段的多个位置信息；第一小区与卫星的相对位置关系；以及第一设备提供的第一小区在第二时间段的多个参考位置。
本申请实施例中提及的第一设备是指能够获取卫星的位置信息和波束指向信息的任一设备。例如，第一设备可以是指卫星；或者，第一设备可以是指网络侧的波束管理模块或波束管理系统等。
作为一种实现方式，第一小区在第二时间段的多个参考位置可以是根据卫星在第二时间段的多个位置信息和第一小区与卫星的相对位置关系得到的。具体地，基站可以获取卫星在第二时间段的多个位置信息，以及卫星处于该各个位置时与第一小区的相对位置关系，基于此，基站可以解算得到第一小区在第二时间段的多个参考位置。
作为另一种实现方式，第一小区在第二时间段的多个参考位置可以是第一设备(比如，卫星、波束管理模块等)直接提供给基站的。
在一些实施例中，本申请实施例对第一小区的参考位置的拟合结果可以是第一小区的参考位置的坐标的时间函数。示例性地，第一小区的参考位置的拟合结果可以表示为如下形式。
X(t)＝a1f1(t)+a2f2(t)+...
Y(t)＝b1f1(t)+b2f2(t)+...
Z(t)＝c1f1(t)+c2f2(t)+...
在一些实施例中，该第一小区的参考位置的拟合结果可以理解为前文提及的第一模型，其中，a1、a2……b1、b2……c1、c2……可以理解为第一模型的参数。也就是说，在一些实施例中，第一信息可以包括a1、a2……b1、b2……c1、c2……的取值。
本申请实施例对拟合第一小区在第二时间段的多个参考位置以得到第一信息(比如，第一模型的参数)的方式不做具体限定。示例性地，本申请实施例可以利用切比雪夫多项式拟合算法对第一小区在第二时间段的多个参考位置进行拟合以得到第一信息。
在一些实施例中，可以根据具体情况利用不同阶数的切比雪夫多项式拟合算法对第一小区在第二时间段的多个参考位置进行拟合。不同阶数的切比雪夫多项式拟合算法对应的拟合曲线存在变化，可以选择合适阶数的切比雪夫多项式拟合算法来进行拟合，以得到更为准确的拟合结果(比如，第一信息)。
在一些实施例中，切比雪夫多项式拟合算法的阶数可以根据不同的工作场景由运营商确定。
下面对切比雪夫多项式拟合算法进行简单介绍。
n阶切比雪夫多项式的表达式如式(1)：
在一些实施例中，利用切比雪夫多项式拟合时，拟合的目标是第一小区的参考位置的实时坐标，具体可以参见式(2)：
式中，n为切比雪夫多项式的阶数；分别为X坐标分量、Y坐标分量、Z坐标分量的切比雪夫多项式系数，T为切比雪夫多项式矩阵。具体地，切比雪夫多项式矩阵T和系数矩阵C的表达式如式(3)：
其中，m的取值为拟合时所采用的第一小区在第二时间段的多个参考位置的数量。
如此一来，矩阵C的取值可以通过下式(4)得出，也就是说，利用切比雪夫多项式拟合算法进行拟合的过程仅涉及下面矩阵方程的求解。
TTTC＝TTx            (4)
本申请实施例对求解该矩阵方程的方式不做具体限定。示例性地，可以直接求逆矩阵，解得C如下式(5)；或者，也可以利用LU分解等其他算法求解，以进一步缩减求解C的时间。
C＝(TTT)-1TTx             (5)
利用切比雪夫多项式拟合算法进行拟合的方式较为简洁，且算力消耗低，从而能够降低网络侧解算第一小区的参考位置的算力负担。
当然，在一些实施例中，本申请实施例也可以利用其他拟合算法对第一小区在第二时间段的多个参考位置进行拟合，例如，可以利用拉格朗日多项式内插法对第一小区在第二时间段的多个参考位置进行拟合等。
在一些实施例中，可以根据以下因素中的一种或多种选取拟合第一小区在第二时间段的多个参考位置的方法：卫星的运行轨道，以及卫星对应的星历格式。换句话说，拟合方法可以是根据上述因素中的一种或多种选取的。例如，可以根据卫星的运行轨道，选择采用切比雪夫多项式还是拉格朗日多项日内插法来进行拟合，或者，可以根据卫星的运行轨道，选择具体采用几阶切比雪夫多项式。
在本申请实施例中，卫星和精度需求不同，选取的第一模型和算法可能不同，比如，可能选取不同阶的切比雪夫多项式来拟合第一小区的参考位置，本申请实施例对此并不限定。
在一些实施例中，第一信息的更新是基于条件触发的。以基站向终端设备发送第一信息为例，基站可以基于条件触发第一信息的更新，并将更新后的第一信息重新发送给终端设备。
触发第一信息更新的条件可以包括多种，本申请实施例对此并不限定。示例性地，触发第一信息更新的条件可以包括以下中的一种或多种：星历的更新；第一小区与卫星的相对位置关系改变；以及第一小区的参考位置改变。
在一些实施例中，星历更新可能会更新卫星位置的精度，从而影响第一信息的准确性，因此，星历更新时触发第一信息的更新能够保证卫星位置的精度，从而保证第一信息的准确性。
在一些实施例中，第一小区与卫星的相对位置关系改变可以是指存在新的第一小区与卫星的相对位置关系。在一些实施例中，第一小区与卫星的相对位置关系改变可以是指对已给出的第一小区与卫星的相对位置关系进行改动。
作为一个示例，在网络侧根据卫星的多个位置信息和第一小区与卫星的相对位置关系预测第一小区的参考位置的情况下，如果第一小区与卫星的相对位置关系不固定，则触发第一信息更新的条件可以包括：星历的更新，和/或，第一小区与卫星的相对位置关系改变。
作为另一个示例，在网络侧根据卫星的多个位置信息和第一小区与卫星的相对位置关系预测第一小区的参考位置的情况下，如果第一小区与卫星的相对位置关系固定，则触发第一信息更新的条件可以包括：星历的更新。
作为又一个示例，在第一设备(比如，运营商的卫星、波束管理模块等)提供第一小区的参考位置的情况下，触发第一信息更新的条件可以包括：第一小区的参考位置改变。在一些实施例中，第一小区的参考位置改变可以是指第一设备提供新的第一小区的参考位置。
在一些实施例中，第一信息可以承载于系统信息中，比如主系统信息块(master information block，MIB)、系统信息块(system information block，SIB)。本申请实施例对承载第一信息的SIB的类型不做具体限定，示例性地，第一信息可以承载于SIB 19中。
作为一种实现方式，SIB 19中可以包括一个字段(比如，cellReferenceTrail字段)，该字段所包含的内容为第一信息，比如，第一模型的参数。如此一来，终端设备便可以通过获取SIB 19中的该字段，确定第一小区在第一时间段的连续的参考位置。
在一些实施例中，第一信息承载于系统信息(比如，SIB 19)中时，承载第一信息的字段可以以多个单精度浮点数的形式存储于系统信息中，格式如下所示。
不过本申请实施例并不限定于此，在一些实施例中，可以根据卫星轨道特性将承载第一信息的字段设置为定点数或带有特定步长的整数的形式。也就是说，承载第一信息的字段也可以以定点数或带有特定步长的整数的形式存储于系统信息中，以节省空间、提升性能。
在一些实施例中，SIB 19除了承载第一信息之外，还可以承载其他信息。示例性地，SIB 19的字段包括但不限于：星历信息(EphemerisInfo)、小区参考轨迹参数(cellReferenceTrail，可以用于承载第一 信息)、纪元时间(epochTime)、信息块有效时间(ntn-UlSyncValidityDuration)、小区重选的距离阈值(distanceThresh)。
上述epochTime可以通过系统帧号(system frame number，SFN)和子帧编号(SubFrameNR)给出，其中，SFN是基站的系统帧号，SubFrameNR是子帧编号，两者表征了一个下行子帧的开始时间，可重用于指示该NTN辅助信息块的参考时刻。ntn-UlSyncValidityDuration指NTN辅助信息块内各信息保持可靠的时长，根据该系统信息块内所有信息的有效时间综合确定，不限于星历信息的有效时长。
下面以系统信息为SIB 19为例，给出包含第一信息的SIB 19的示例，主要用于示例性介绍SIB 19包含的NTN相关字段。
NTN-Config包含的信息元素(information element，IE)如下所示。

本申请实施例通过在系统信息(比如，SIB 19)中增加承载第一信息的字段，使得终端设备能够以较低的算力负担解算出时变的第一小区的参考位置。在一些实施例中，终端设备还能基于解算出的第一小区的参考位置进行小区重选的触发判决。此外，本申请实施例中的第一信息的有效时间较长，不需要进行高频率的更新，能够有效解决地球移动小区场景中的小区重选问题，比如NTN-NTN小区重选问题、NTN-TN小区重选问题等。
如前文所述，在一些实施例中，终端设备获取第一小区的参考位置是为了触发小区选择/重选。下面以终端设备获取第一小区的参考位置是为了触发小区重选为例，对终端设备接收第一信息之后的流程进行介绍。
图7为本申请另一实施例提供的无线通信的方法的流程示意图。图7所示的方法包括步骤S710和步骤S720。
在步骤S710，终端设备接收第一信息。
关于步骤S710的相关介绍，可以参见前文对步骤S610以及对第一信息的详细介绍，为了简洁，此处不再赘述。
在步骤S720，终端设备根据第一信息确定是否开启同级别或低级别的小区测量。在一些实施例中，该同级别或低级别的小区测量用于小区重选。
在一些实施例中，该同级别或低级别的小区测量的开启是基于时间触发的。例如，在终端设备静止或低速移动(相对于卫星的移动，终端设备的低速移动可以视为静止状态)的状态下，该小区测量的开启可以基于时间触发。
在一些实施例中，该同级别或低级别的小区测量的开启时间(或称，开启该同级别或低级别的小区测量的时间)是根据第一信息和触发小区重选的距离阈值确定的。
在一些实施例中，如果终端设备根据第一信息确定的开启小区测量的时间未到达，则终端设备可以不开启同级别或低级别的小区测量。
在一些实施例中，如果终端设备根据第一信息确定的开启小区测量的时间到达，则终端设备可以开启同级别或低级别的小区测量。
在一些实施例中，开启小区测量的时间可以利用第一计时器指示。作为一种实现方式，终端设备可以根据第一信息和触发小区重选的距离阈值确定出小区重选测量的开启时刻treselect，定义当前时刻为t0(即解析出treselect的时刻)，并且终端设备可以在t0时刻开启第一定时器(比如，定时器T440)，第一定时器的持续时长＝treselect-t0，在第一定时器结束时，若终端设备处于空闲态或非激活态，则开启用于小区重选的同级别/低级别的小区测量。
也就是说，本申请实施例中，用于小区重选的测量的开启规则可以包括以下中的一项或多项：(1)终端设备根据小区重选测量的开启时刻(比如，treselect)和解析出小区重选测量的开启时刻的时刻(比如，t0)设置第一定时器，该第一定时器用于指示开启小区测量的时间；(2)无论何种情况，终端设备侧总开启对高级别的小区的测量；(3)如果终端设备侧的源小区的信号强度低于阈值或第一计时器计时结束，则终端设备侧开启对同级别或低级别的小区测量。
具体地，下面给出小区测量的开启是基于时间触发的测量开启规则的一个示例。
-如果服务小区满足Srxlev>SIntraSearchP和Squal>SIntraSearchQ:
-如果在SIB 19中广播触发小区重选的距离阈值和第一信息，并且如果终端设备支持基于时间的测量发起并且已经获得终端设备的位置信息:
-如果终端设备侧第一定时器未结束，则终端设备可以不执行频率内测量；
否则，终端设备将执行频率内测量；
否则，终端设备可能不执行频率内测量；
否则，终端设备将执行频率内测量。
Srxlev表示小区选择接收电平值。SIntraSearchP表示用于NR异频或RAT间频率测量的Srxlev阈 值。Squal表示小区选择接收信号质量值。SIntraSearchQ表示用于NR异频或RAT间频率测量的Squal阈值。
在一些实施例中，同级别或低级别的小区测量可以包括以下中的一种或多种：异频小区测量(例如，NR频率间测量)，无线接入技术(radio access technology，RAT)间频率测量。
在一些实施例中，终端设备可以对系统信息中指示的且终端设备支持的NR频率间和RAT间频率应用以下测量规则。
-对于重选优先级高于当前NR频率的重选优先级的NR频率间或RAT间频率，终端设备将执行更高优先级NR频率间或RAT间频率的测量。
-对于重选优先级等于或低于当前NR频率的重选优先级的NR频率间，以及对于重选优先级低于当前NR频率的重选优先级的RAT间频率:
-如果服务小区满足Srxlev>SnonIntraSearchP和Squal>SnonIntraSearchQ:
-如果在SIB19中广播触发小区重选的距离阈值和第一信息，并且如果终端设备支持基于时间的测量发起并且已经获得终端设备的位置信息:
-如果终端设备侧第一定时器未结束，则终端设备可以选择不执行相等或更低优先级的NR频率间小区或者更低优先级的RAT间频率小区的测量；
-否则，终端设备将执行NR相同或更低优先级的频率间小区或较低优先级的RAT间频率小区的测量；
否则，终端设备可以选择不执行同等或更低优先级的NR频率间小区或者更低优先级的RAT间频率小区的测量；
否则，终端设备将根据执行相等或较低优先级的NR频率间小区或较低优先级的RAT间频率小区的测量。
本申请实施例中，终端设备能够基于第一信息得到第一小区的参考位置的轨迹信息，从而得到终端设备与第一小区的距离随时间的函数，进而终端设备通过一次超越方程的迭代求解，预测得到同级别/低级别的用于小区重选的小区测量的开启时间，将距离阈值触发的小区重选转变为时间触发的小区重选，简化小区重选的触发过程。进一步地，本申请实施例可以利用第一计时器确定小区测量的开启时间，进一步简化了小区重选的触发过程。
在一些实施例中，该同级别或低级别的小区测量的开启是基于距离触发的。例如，在终端设备高速移动(相对于卫星的移动，终端设备的高速移动可以视为两者相互移动)的状态下，该小区测量的开启可以基于距离触发。
作为一种实现方式，终端设备可以根据第一信息解析(比如，周期性解析)第一小区当前的参考位置，并根据终端设备的位置信息计算当前终端设备与第一小区的参考位置的距离，如果该距离超过触发小区重选的距离阈值，且终端设备处于空闲态/非激活态，则终端设备开启用于小区重选的同级别/低级别的小区测量。
应该理解，基于距离触发的测量开启规则与基于时间触发的测量开启规则类似，但是需要将利用第一定时器判断开始时间是否到达的方式修改为基于终端设备当前与第一小区的参考位置的距离是否超过触发小区重选的距离阈值。
继续参见图7，在一些实施例中，图7所示的方法还可以包括步骤S730。在步骤S730，终端设备启动第二计时器，第二计时器用于指示第一信息的有效时间。
在一些实施例中，如果承载第一信息的系统信息(比如，SIB 19)包括多个字段，第二计时器指示的有效时间是根据该系统信息内所有信息的有效时间综合确定的，比如，可以是该系统信息内所有信息的有效时间中的最小值。
在一些实施例中，第二计时器结束前或结束时，终端设备需要向网络侧发送第一请求消息，以请求新的第一信息。
在一些实施例中，终端设备可以根据信息块纪元时间和信息块有效时间来启动第二计时器(比如，计时器T430)。这种情况下，第二计时器的开启时刻为该信息块指示的纪元时间，第二计时器的持续时长为信息块有效时间。
在一些实施例中，信息块指示的纪元时间通常早于当前时刻，这种情况下，可以计算信息块指示的纪元时间与当前时刻之间的时间差值，在进行第二计时器的设置。
在一些实施例中，信息块纪元时间和信息块有效时间可以是网络侧通过系统信息发送给终端设备的。例如，信息块纪元时间和信息块有效时间可以承载于SIB 19中。
在一些实施例中，第二计时器结束前或结束后，终端设备向网络侧发送第一请求消息之后，如果第一信息或星历信息与上一次获得的不同，终端设备需要重新确定是否触发用于小区重选的小区测量；如 果第一信息和星历信息与上一次获得的相同，则终端设备无需执行其他与小区重选相关的步骤。
作为一种实现方式，假设小区测量是基于时间触发的，如果第一信息或星历信息与上一次获得的不同，则终端设备需要根据新的第一信息和触发小区重选的距离阈值解析小区重选测量的开启时刻。在一些实施例中，如果当前有开启的第一计时器，则终端设备需要终止该第一计时器，并根据重新计算的小区重选测量的开启时刻，开启新的第一计时器。在新的第一计时器计时结束时，如果终端设备处于空闲态/非激活态，则终端设备开启用于小区重选的同级别/低级别的小区测量。
作为又一种实现方式，假设小区测量是基于距离触发的，如果第一信息或星历信息与上一次获得的不同，则终端设备需要根据新的第一信息解算(比如，周期性解算)第一小区的参考位置(比如，可以以接收到新的第一信息的时刻为第一时间段的起点)，如果终端设备与第一小区的参考位置的距离大于触发小区重选的距离阈值，且终端设备处于空闲态/非激活态，则终端设备开启用于小区重选的同级别/低级别的小区测量。
在一些实施例中，如果终端设备周期性解算第一小区的参考位置，该解算周期的大小可以根据第一小区的大小和卫星的移动速度等因素合理设置。
本申请实施例对步骤S720和步骤S730的执行顺序不做限定。示例性地，可以先执行步骤S720，也可以先执行步骤S730，也可以同时执行步骤S720和步骤S730。
在前文介绍的基础上，下面结合图8和图9，分别对网络侧(例如，基站)和终端设备侧的整体流程进行示例性介绍。
图8示出了网络侧的整体流程。网络侧主要完成以下流程中的一种或多种：(1)分析卫星自身轨迹；(2)解算/预测第一小区的参考位置的轨迹；(3)拟合第一小区的参考位置的轨迹；(4)将拟合结果作为第一信息发送给终端设备。
在一些实施例中，网络侧可以省略分析卫星自身轨迹的流程，例如，第一小区的参考位置是由第一设备提供的场景下，网络侧便不用分析卫星自身轨迹。
在一些实施例中，网络侧可以根据一段时间(比如，第二时间段)内离散的卫星位置信息和第一小区与卫星的相对位置关系，预测后续一段时间(比如，第一时间段)内的第一小区的参考位置的轨迹。
在一些实施例中，网络侧可以具备以下能力中的一项或多项以完成对第一信息的确定。
能力1：网络侧可以配有相应的卫星观测系统，例如，地面配有相应的卫星观测系统。卫星观测系统具有基本的卫星观测和轨迹预测的能力。
在一些实施例中，卫星观测系统获得的观测和轨迹预测结果可以依据星历的形式发送给NTN网络设备。
在一些实施例中，该星历中可以包含足够的信息使得网络侧能够获取当前以及接下来一段时间内的卫星位置。
在一些实施例中，卫星观测系统可以以一定的周期更新星历信息，以保证网络侧获取的卫星位置的精度。
为了便于理解，下面结合表1，示例性给出星历信息可能包含的内容。
表1
能力2：网络侧可以具有获知当前第一小区的参考位置的能力，并对后续一段时间的第一小区的参考位置的运动轨迹进行预测。
能力3：如果网络侧基于卫星的位置信息和第一小区与卫星的相对位置关系预测第一小区的参考位置，则网络侧可以具有基本的星历解析能力，并能够基于星历进行轨迹预测。
在一些实施例中，如果星历信息为经典的卫星轨道参数，则网络侧应该能够基于简单的天体运动模型(或通过其他方式)进行卫星位置预测。在一些实施例中，网络侧也可以配置有其他格式的星历，或者是其他获取卫星在后续一段时间的位置的方法，也可以重用网络侧其他流程中已经解算出的卫星位置。
图9示出了终端设备侧的整体流程。终端设备的流程主要包括获取第一信息，以及根据第一信息进行小区重选测量开启的判断。
在一些实施例中，如果终端设备处于静止状态或低速移动状态，则终端设备可以基于第一信息和小区重选的距离阈值计算开启小区测量的时间，以便在该时间到达时开启同级别/低级别的小区测量。
在一些实施例中，如果终端设备处于高速移动状态，则终端设备可以基于第一信息计算第一小区的参考位置，并基于第一小区的参考位置和小区重选的距离阈值，确定是否触发小区重选(即，开启级别/低级别的小区测量)。
为了便于理解，下文以小区重选的场景为例，给出几个具体的实施例。需要说明的是，下文的实施例仅用于示例，而不用于对本申请实施例的方案造成限定。
实施例一：网络侧基于星历信息确定第一小区的参考位置
实施例一主要介绍采用常规的基于轨道参数的星历信息，且不重用网络侧其他流程计算出的卫星位置的情况下，网络侧和终端设备侧的主要处理流程。
首先介绍网络侧的主要处理流程。
1、网络侧接收来自卫星观测系统的星历信息，并进行卫星轨迹预测。
卫星观测系统的星历信息可以以表2的格式提供(表2所示的星历格式参考GPS广播星历)，该星历信息可以周期性地提供。网络侧接收星历信息后，可以根据简单天体运动模型和星历中的修正项预测一段时间内(具体时长可以根据卫星轨道类型、星历精度等确定)的卫星轨迹。
表2
表2中各参数的含义以及各参数的取值可以分别参见表3和表4。
表3

表4
根据上述参数，利用以下步骤预测20分钟内卫星的位置，共预测20个时刻对应的卫星位置。需要说明的是，如果使用更为简洁的TR38.821中的星历，则无需进行以下步骤中修正项的计算。
(1)求长半轴A
(2)计算平角速度n0
其中，GM为地球引力常数。
(3)计算从预测卫星位置的时刻到参考时刻的时间差tk
tk＝t-toe
(4)改正平角速度n
n＝n0+Δn
(5)计算平近点角Mk
Mk＝M0+n×tk
(6)迭代计算偏近点角Ek
Mk＝Ek-e×sin Ek
(7)计算真近点角vk
迭代求解出20个时刻(比如，间隔为60秒)对应的真近点角vk(k＝1、2、3……20)，此时采用的时间刻度仍然可以为GPS星期内的秒数。
(8)计算纬度参数
(9)周期改正项
(10)计算改正后的纬度参数uk
(11)计算改正后的向径rk
rk＝A(1-e cos Ek)+δrk
(12)计算改正后的倾角ik
(13)计算卫星在轨道平面内的坐标(x′k y′k)
(14)改正升交点的经度
其中，是地球自转的角速度。
(15)计算卫星在地球固定坐标系中的坐标(XK YK ZK)
2、网络侧基于卫星位置和波束指向得到第一小区的参考位置
第一小区与卫星的相对位置的示意图可以参见图10。如图10所示，坐标系Y轴指向正北方向，X轴正向指向正东方向，第一小区的参考位置(对应第一小区的中心位置)为地面一点，第一小区与卫星的相对位置可以用θatenna、γatenna来表示，θatenna为“第一小区的参考位置-卫星”连线与卫星垂直于地心方向的夹角，γatenna为“星下点-第一小区的参考位置”连线与正北方向的夹角。在实施例一中，θatenna、γatenna取值均为0，因此，第一小区的参考位置是卫星的星下点。根据卫星位置(XK YK ZK)，k＝1、2、3……20，在WSG84坐标系中求解出20个第一小区的参考位置(Xck Yck Zck)。
实施例一中的求解出的第一小区的参考位置的轨道偏心率低，接近于正圆，因此，(Xck Yck Zck)沿时间的变化平缓，曲线接近于直线。根据该特性，采用多项式拟合算法对该20个第一小区的参考位置进行拟合时，可以采用低阶切比雪夫多项式(比如，4阶切比雪夫多项式)为第一模型。以采用4阶切比雪夫多项式进行拟合为例，各阶多项式形式及其参数如表5所示。
表5
采用该4阶切比雪夫多项式拟合得到的拟合结果在三个方向的误差均在0.1米以下，表明拟合度较好，拟合的第一小区的位置精度较高。需要注意的是，实施例一中，解析星历时的参考时间为toe(2022年12月9日8:00)，所以拟合采用的时间坐标轴为tcell＝t-toe(t为时间变量)，单位可以为分钟。
3、网络侧确定第一信息
第一信息例如可以承载于SIB 19的cellReferenceTrail字段中。cellReferenceTrail的格式设计可以如下所示。
在实施例一中，上述参数的具体取值可以参见表6。
表6

下面对终端设备侧的主要流程进行介绍。
1、终端设备向网络侧请求第一信息
以第一信息承载于SIB 19为例，终端设备可以向网络设备请求获取SIB 19并解析，以获得包括但不限于表7的信息。
表7
2、开启第二计时器
以第二计时器为计时器T430为例，终端设备可以开启SIB 19对应的有效时间计时器T430。作为一种实现方式，终端设备可以根据纪元时间、信息块有效时间两个参数设置一个纪元时间对应时刻开启、持续信息块有效时间对应的时长的定时器。
3、计算小区重选的测量开启时间，设置第一计时器T440
作为一种实现方式，终端设备计算小区重选的测量开启时间，并设置第一计时器T440可以通过下述步骤(1)至步骤(5)来实现。
步骤(1)：终端设备将当前时间转化为GPS时间
在一些实现方式中，可以将当前时间先转化为儒略日，再将儒略日转化为GPS时间。具体地，当前时间对应的儒略日可以参照下式计算：JulianDay＝fix(365.25*(year))+fix(30.6001*(month+13))+day+(hour+min/60+second/3600)/24+1720981.5；然后参照下式计算当前时间对应的GPS时间t：t＝t2*604800，其中，t2＝(JulianDay-2444244.5)/7-fix((JulianDay-2444244.5)/7)；最后计算卫星钟差改正后的当前时间对应的GPS时间(以分钟为单位)：t＝(t-(afc(1)+afc(2)*(t-toe)+afc(3)*(t-toe)^2))/60。
步骤(2)：获取第一小区的参考位置
终端设备将当前时间对应的GPS时间t作为变量，根据第一信息获取完整连续的第一小区的参考位置的轨迹如下式所示。
步骤(3)：计算小区重选的测量开启时刻
作为一种实现方式，终端设备可以通过对超越方程的迭代求解，求解出小区重选可能的开启时刻treselect，在步骤(1)中，终端设备已经将当前时间t转换为儒略日和GPS时间，并以toe(2022年12月9日8：00)为起点，分钟为单位设置为时间轴tcell＝t-toe(t为时间变量，该坐标轴与网络侧拟合时采用的坐标轴一致)，带入到第一模型，得到小区中心参考位置Xck，Yck，Zck。
终端设备求解treselect的超越方程如下所示：
(Xu-Xc(treselect-toe))2+(Yu-Yc(treselect-toe))2+(Zu-Zc(treselect-toe))2-dthresh 2＝0
其中，Xu，Yu，Zu为终端设备在ECEF坐标系下的坐标。在一些实施例中，如果终端设备的位置形式以经纬度格式给出，可以利用大地椭球将终端设备的位置转化为ECEF直角坐标系的值。
本申请实施例对求解上述超越方程的方式不做具体限定。示例性地，可以利用迭代算法(比如，二分法、牛顿法、优化算法等)求解其近似解。以利用牛顿法求解为例，设置小区重选的距离阈值dthresh为10km，解出treselect-toe的具体值为11.41s，因此，在2022年12月9日8：00开始11.41秒以后可考虑同级别或低级别小区重选测量。在一些实施例中，终端设备需在此值解出后根据当前时刻t0和treselect设置第一定时器T440，T440的起始时间为t0，持续时间为treselect-t0。
步骤(4)：如果终端设备处于空闲态/非激活态，根据条件执行小区重选的测量
在该实施例中，无论何种情况，终端设备总开启对高级别小区的测量。
在该实施例中，若终端设备的源小区的信号强度低于阈值或第一计时器T440结束，则终端设备开 启对同级别或低级别的小区测量，详细阐述如下。
-如果服务小区满足Srxlev>SIntraSearchP和Squal>SIntraSearchQ:
-如果在SIB19中广播distanceThresh和cellReferenceTrail，并且如果UE支持基于时间的测量发起并且已经获得终端设备的位置信息:
-如果终端设备侧第一计时器未结束，则终端设备可以不执行频率内测量；
否则，终端设备将执行频率内测量；
否则，终端设备可能不执行频率内测量；
否则，终端设备将执行频率内测量。
在一些实施例中，终端设备将对系统信息中指示的并且UE支持的NR频率间和RAT间频率应用以下规则:
-对于重选优先级高于当前NR频率的重选优先级的NR频率间或RAT间频率，终端设备将执行更高优先级NR频率间或RAT间频率的测量。
-对于重选优先级等于或低于当前NR频率的重选优先级的NR频率间，以及对于重选优先级低于当前NR频率的重选优先级的RAT间频率:
-如果服务小区满足Srxlev>SnonIntraSearchP和Squal>SnonIntraSearchQ:
-如果在SIB19中广播distanceThresh和cellReferenceTrail，并且如果终端设备支持基于时间的测量发起并且已经获得终端设备的位置信息:
-如果终端设备侧第一计时器未结束，则终端可以选择不执行相等或更低优先级的NR频率间小区或者更低优先级的RAT间频率小区的测量；
-否则，UE将根据执行NR相同或更低优先级的频率间小区或较低优先级的RAT间频率小区的测量；
否则，UE可以选择不执行同等或更低优先级的NR频率间小区或者更低优先级的RAT间频率小区的测量；
否则，UE将根据执行相等或较低优先级的NR频率间小区或较低优先级的RAT间频率小区的测量。
步骤(5)：第二计时器即将结束，返回执行步骤(1)。
终端设备在第二计时器(比如，T430计时器)即将结束时，重新向网络侧请求相应第一信息的更新，并返回执行步骤(1)。
实施例二：网络侧利用其他方式确定第一小区的参考位置
实施例二主要介绍第一小区的参考位置不依赖星历进行推测时，网络侧和终端设备侧的主要处理流程。需要说明的是，实施例二中的卫星轨道与实施例一中的相同，为了简洁，实施例二不再赘述。还需要说明的是，实施例二中，第一小区的参考位置位于卫星的非星下点处。
首先介绍网络侧的主要处理流程。
1、网络侧拟合第一小区的参考位置随时间变化的曲线
网络侧可以利用第一设备提供的第一小区的参考位置，在WSG84坐标系中给出20个第一小区的参考位置(Xck Yck Zck)。
实施例二中求解出的第一小区的参考位置的轨道偏心率低，接近于正圆，因此，(Xck Yck Zck)沿时间的变化平缓，曲线接近于直线。根据该特性，采用多项式拟合算法对该20个第一小区的参考位置进行拟合时，可以采用低阶切比雪夫多项式(比如，4阶切比雪夫多项式)为第一模型。以采用4阶切比雪夫多项式进行拟合为例，各阶多项式形式及其参数如表8所示。
表8
采用该4阶切比雪夫多项式拟合得到的拟合结果在拟合三个方向的坐标时采用的时间坐标为tcell＝t-toe，单位为分钟，三个方向的误差均在0.05米以下，表明在波束指向非星下点时，曲线变化依然平滑，该方案仍能较好地的拟合出轨迹，依然能解算出较高精度的第一小区的参考位置(需要说明的是，上述误差仅为拟合误差，实际中可能还需考虑网络侧获取的卫星轨迹自身的误差)。
在实施例二中，默认toe可以由星历给出。在一些实施例中，若没有星历或其它参数向终端设备指 示拟合的参考时间toe,可以考虑重用SIB 19中的纪元时间字段指示toe。
2、网络侧确定第一信息
第一信息例如可以承载于SIB 19的cellReferenceTrail字段中。cellReferenceTrail的格式设计可以如下所示。
在实施例二中，上述参数的具体取值可以参见表9。
表9
下面对终端设备侧的主要流程进行介绍。
1、终端设备向网络侧请求第一信息
以第一信息承载于SIB 19为例，终端设备可以向网络设备请求获取SIB 19并解析，以获得包括但不限于表10的信息。
表10
2、开启第二计时器
以第二计时器为计时器T430为例，终端设备可以开启SIB 19对应的有效时间计时器T430。作为一种实现方式，终端设备可以根据纪元时间、信息块有效时间两个参数设置一个纪元时间对应时刻开启、持续信息块有效时间对应的时长的定时器。
3、计算小区重选的测量开启时间，设置第一计时器T440
作为一种实现方式，终端设备计算小区重选的测量开启时间，并设置第一计时器T440可以通过下述步骤(1)至步骤(5)来实现。
步骤(1)：终端设备将当前时间转化为儒略日
当前时间对应的儒略日可以参照下式计算：JulianDay＝(fix(365.25*(year))+fix(30.6001*(month+13))+day+(hour+min/60+second/3600)/24+1720981.5)/60。
在一些实现方式中，可以将当前时间先转化为儒略日，再将儒略日转化为GPS时间，具体方式可以参考实施例一，此处不再赘述。需要说明的是，实施例一中，终端设备也可以将当前时间转化为儒略日即可，无需转化成GPS时间。
步骤(2)：获取第一小区的参考位置
终端设备将toe作为参考起始时间，根据第一信息获取完整连续的第一小区的参考位置的轨迹如下式所示。
步骤(3)：计算小区重选的测量开启时刻
作为一种实现方式，终端设备可以通过对超越方程的迭代求解，求解出小区重选可能的开启时刻treselect，在步骤(1)中，终端设备已经将当前时间t转换为儒略日，并以toe(2022年12月9日8：00)为起点，分钟为单位设置为时间轴t，带入到第一模型，得到小区中心参考位置XCk，YCk，ZCk。
终端设备求解treselect的超越方程如下所示：
(Xu-Xc(treselect-toe))2+(Yu-Yc(treselect-toe))2+(Zu-Zc(treselect-toe))2-dthresh 2＝0
其中，Xu，Yu，Zu为终端设备在ECEF坐标系下的坐标。在一些实施例中，如果终端设备的位置形式以经纬度格式给出，可以利用大地椭球将终端设备的位置转化为ECEF直角坐标系的值。
本申请实施例对求解上述超越方程的方式不做具体限定。示例性地，可以利用迭代算法(比如，二分法、牛顿法、优化算法等)求解其近似解。以利用牛顿法求解为例，设置小区重选的距离阈值dthresh为10km，解出treselect-toe的具体值为12.37s，因此，在2022年12月9日8：00开始12.37秒以后可考虑同级别或低级别小区重选测量。在一些实施例中，终端设备需在此值解出后根据当前时刻t0和treselect设置第一定时器T440，T440的起始时间为t0，持续时间为treselect-t0。
步骤(4)：如果终端设备处于空闲态/非激活态，根据条件执行小区重选的测量
在该实施例中，无论何种情况，终端设备总开启对高级别小区的测量。
在该实施例中，若终端设备的源小区的信号强度低于阈值或第一计时器T440结束，则终端设备开启对同级别或低级别的小区测量，详细阐述如下。
-如果服务小区满足Srxlev>SIntraSearchP和Squal>SIntraSearchQ:
-如果在SIB19中广播distanceThresh和cellReferenceTrail，并且如果UE支持基于时间的测量发起并且已经获得终端设备的位置信息:
-如果终端设备侧第一计时器未结束，则终端设备可以不执行频率内测量；
否则，终端设备将执行频率内测量；
否则，终端设备可能不执行频率内测量；
否则，终端设备将执行频率内测量。
在一些实施例中，终端设备将对系统信息中指示的并且UE支持的NR频率间和RAT间频率应用以下规则:
-对于重选优先级高于当前NR频率的重选优先级的NR频率间或RAT间频率，终端设备将执行更高优先级NR频率间或RAT间频率的测量。
-对于重选优先级等于或低于当前NR频率的重选优先级的NR频率间，以及对于重选优先级低于当前NR频率的重选优先级的RAT间频率:
-如果服务小区满足Srxlev>SnonIntraSearchP和Squal>SnonIntraSearchQ:
-如果在SIB19中广播distanceThresh和cellReferenceTrail，并且如果终端设备支持基于时间的测量发起并且已经获得终端设备的位置信息:
-如果终端设备侧第一计时器未结束，则终端可以选择不执行相等或更低优先级的NR频率间小区或者更低优先级的RAT间频率小区的测量；
-否则，UE将根据执行NR相同或更低优先级的频率间小区或较低优先级的RAT间频率小区的测量；
否则，UE可以选择不执行同等或更低优先级的NR频率间小区或者更低优先级的RAT间频率小区的测量；
否则，UE将根据执行相等或较低优先级的NR频率间小区或较低优先级的RAT间频率小区的测量。
步骤(5)：第二计时器即将结束，返回执行步骤(1)。
终端设备在第二计时器(比如，T430计时器)即将结束时，重新向网络侧请求相应第一信息的更新，并返回执行步骤(1)。
实施例三：确定LEO动态小区的参考位置
实施例一和实施例二主要针对GEO卫星，而实施例三主要针对LEO卫星。实施例三主要介绍LEO卫星下波束动态变化时网络侧和终端设备侧的主要处理流程。需要说明的是，实施例三中的卫星轨道与实施例一中的相同，为了简洁，实施例三不再赘述。还需要说明的是，由于实施例三的部分步骤与实施 例一或实施例二相同，因此，对于实施例三未详细描述的部分可以参见前文实施例一或实施例二。
首先介绍网络侧的主要处理流程。
1、网络侧获取卫星轨迹
在该实施例中，卫星观测系统的星历信息可以以任意格式给出。网络侧可以直接获知卫星轨迹，或根据星历信息求得一段时间内任意时刻卫星的位置。网络侧预测接下来20个时刻(例如，间隔为15秒)对应的卫星位置，此时采用的时间标准可以为儒略日或GPS时间。与实施例一或实施例二相同，计20个时刻的起始时间为toe，toe可以由星历或其它方式给出。
2、网络侧拟合第一小区的参考位置随时间变化的曲线
重新参见图10，第一小区对应的波束的指向可以用θatenna、γatenna来表示，在该实施例中，θatenna、γatenna两者的取值分别为时变函数θatenna(t)、γatenna(t)。网络侧可以根据卫星位置和θatenna(t)、γatenna(t)在WSG84坐标系中求解出20个第一小区的参考位置(Xck Yck Zck)。在一些实现方式中，该20个第一小区的参考位置是网络侧根据卫星位置推算得出的。在一些实现方式中，该20个第一小区的参考位置是第一设备直接提供的。
在实施例三中，仍然可以采用多项式拟合算法对该20个第一小区的参考位置进行拟合，例如，可以采用5阶切比雪夫多项式为第一模型。以采用5阶切比雪夫多项式进行拟合为例，各阶多项式形式及其参数如表11所示。
表11
在实施例三中，上述参数的具体取值可以参见表12。
表12
采用该5阶切比雪夫多项式拟合得到的拟合结果在拟合三个方向的坐标时采用的时间坐标为tcell＝t-toe，单位为分钟，三个方向的误差均在0.1米以下，表明在波束指向动态变化时，本申请实施例也能有能力拟合出第一小区的参考位置的轨迹，使得终端设备解算出较高精度的第一小区的参考位置(需要说明的是，上述误差仅为拟合误差，实际中可能还需考虑网络侧获取的卫星轨迹自身的误差)。
实施例三中，后续终端设备侧的主要流程与实施例一或实施例二相同，为了简洁，此处不再赘述。
上文结合图1至图10，详细描述了本申请的方法实施例，下面结合图11至图13，详细描述本申请的装置实施例。应理解，方法实施例的描述与装置实施例的描述相互对应，因此，未详细描述的部分可以参见前面方法实施例。
图11为本申请一实施例提供的无线通信装置的结构示意图。图11所示的无线通信装置1100可以为终端设备，该无线通信装置1100包括接收模块1110。
接收模块1110可以用于接收第一信息，所述第一信息用于指示第一小区在第一时间段的连续的参考位置，所述第一小区的覆盖范围随着卫星的移动而变化。
可选地，所述第一信息包括第一参数，所述第一参数用于确定所述第一小区的参考位置的轨迹信息。
可选地，所述第一信息是对所述第一小区在第二时间段的多个参考位置进行估计得到的。
可选地，所述第一小区在所述第二时间段的多个参考位置是根据以下信息中的一种或多种得到的：所述卫星在所述第二时间段的多个位置信息；所述第一小区与所述卫星的相对位置关系；以及第一设备提供的所述第一小区在所述第二时间段的多个参考位置。
可选地，所述第一信息是基站估计得到的。
可选地，所述第一信息的更新是基于条件触发的，触发所述第一信息更新的条件包括以下中的一种或多种：星历的更新；所述第一小区与所述卫星的相对位置关系改变；以及所述第一小区的参考位置改变。
可选地，在所述终端设备接收第一信息之后，无线通信装置1100还包括：确定模块1120，用于根据所述第一信息确定是否开启同级别或低级别的小区测量，所述同级别或低级别的小区测量用于小区重选。
可选地，所述小区测量的开启是基于时间触发的。
可选地，开启所述小区测量的时间是根据所述第一信息和触发小区重选的距离阈值确定的。
可选地，所述终端设备根据所述第一信息确定是否开启同级别或低级别的小区测量，包括：如果所述终端设备根据所述第一信息确定的开启所述小区测量的时间未到达，所述终端设备不开启同级别或低级别的小区测量；和/或如果所述终端设备根据所述第一信息确定的开启所述小区测量的时间到达，所述终端设备开启同级别或低级别的小区测量。
可选地，开启所述小区测量的时间是利用第一计时器指示的。
可选地，所述小区测量的开启是基于距离触发的。
可选地，无线通信装置1100还包括：启动模块，用于启动第二计时器，所述第二计时器用于指示所述第一信息的有效时间。
可选地，无线通信装置1100还包括：发送模块，用于发送第一请求消息，所述第一请求消息用于获取所述第一信息。
可选地，所述第一信息承载于系统信息中。
可选地，所述接收模块1110可以为收发器1330。无线通信装置1100还可以包括处理器1310和存储器1320，具体如图13所示。
图12为本申请另一实施例提供的无线通信装置的结构示意图。图12所示的无线通信装置1200可以为基站，该无线通信装置1200包括发送模块1210。
发送模块1210可以用于发送第一信息，所述第一信息用于指示第一小区在第一时间段的连续的参考位置，所述第一小区的覆盖范围随着卫星的移动而变化。
可选地，所述第一信息包括第一参数，所述第一参数用于确定所述第一小区的参考位置的轨迹信息。
可选地，所述第一信息是对所述第一小区在第二时间段的多个参考位置进行估计得到的。
可选地，所述第一小区在所述第二时间段的多个参考位置是根据以下信息中的一种或多种得到的：所述卫星在所述第二时间段的多个位置信息；所述第一小区与所述卫星的相对位置关系；以及第一设备提供的所述第一小区在所述第二时间段的多个参考位置。
可选地，所述第一信息是所述基站估计得到的。
可选地，所述第一信息的更新是基于条件触发的，触发所述第一信息更新的条件包括以下中的一种或多种：星历的更新；所述第一小区与所述卫星的相对位置关系改变；以及所述第一小区的参考位置改变。
可选地，所述第一信息用于终端设备确定是否开启同级别或低级别的小区测量，所述同级别或低级别的小区测量用于小区重选。
可选地，所述小区测量的开启是基于时间触发的。
可选地，开启所述小区测量的时间是根据所述第一信息和触发小区重选的距离阈值确定的。
可选地，开启所述小区测量的时间是利用第一计时器指示的。
可选地，所述小区测量的开启是基于距离触发的。
可选地，无线通信装置1200还包括：接收模块1220，用于接收第一请求消息，所述第一请求消息用于获取所述第一信息。
可选地，所述第一信息承载于系统信息中。
可选地，所述发送模块1210可以为收发器1330。基站1200还可以包括处理器1310和存储器1320，具体如图13所示。
图13是本申请实施例的通信装置的示意性结构图。图13中的虚线表示该单元或模块为可选的。该装置1300可用于实现上述方法实施例中描述的方法。装置1300可以是芯片、终端设备或网络设备。
装置1300可以包括一个或多个处理器1310。该处理器1310可支持装置1300实现前文方法实施例所描述的方法。该处理器1310可以是通用处理器或者专用处理器。例如，该处理器可以为中央处理单元(central processing unit，CPU)。或者，该处理器还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门 阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
装置1300还可以包括一个或多个存储器1320。存储器1320上存储有程序，该程序可以被处理器1310执行，使得处理器1310执行前文方法实施例所描述的方法。存储器1320可以独立于处理器1310也可以集成在处理器1310中。
装置1300还可以包括收发器1330。处理器1310可以通过收发器1330与其他设备或芯片进行通信。例如，处理器1310可以通过收发器1330与其他设备或芯片进行数据收发。
本申请实施例还提供一种计算机可读存储介质，用于存储程序。该计算机可读存储介质可应用于本申请实施例提供的终端或网络设备中，并且该程序使得计算机执行本申请各个实施例中的由终端或网络设备执行的方法。
本申请实施例还提供一种计算机程序产品。该计算机程序产品包括程序。该计算机程序产品可应用于本申请实施例提供的终端或网络设备中，并且该程序使得计算机执行本申请各个实施例中的由终端或网络设备执行的方法。
本申请实施例还提供一种计算机程序。该计算机程序可应用于本申请实施例提供的终端或网络设备中，并且该计算机程序使得计算机执行本申请各个实施例中的由终端或网络设备执行的方法。
应理解，本申请中术语“系统”和“网络”可以被可互换使用。另外，本申请使用的术语仅用于对本申请的具体实施例进行解释，而非旨在限定本申请。本申请的说明书和权利要求书及所述附图中的术语“第一”、“第二”、“第三”和“第四”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。
在本申请的实施例中，提到的“指示”可以是直接指示，也可以是间接指示，还可以是表示具有关联关系。举例说明，A指示B，可以表示A直接指示B，例如B可以通过A获取；也可以表示A间接指示B，例如A指示C，B可以通过C获取；还可以表示A和B之间具有关联关系。
在本申请实施例中，“与A相应的B”表示B与A相关联，根据A可以确定B。但还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。
在本申请实施例中，术语“对应”可表示两者之间具有直接对应或间接对应的关系，也可以表示两者之间具有关联关系，也可以是指示与被指示、配置与被配置等关系。
本申请实施例中，“预定义”或“预配置”可以通过在设备(例如，包括终端设备和网络设备)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现，本申请对于其具体的实现方式不做限定。比如预定义可以是指协议中定义的。
本申请实施例中，所述“协议”可以指通信领域的标准协议，例如可以包括LTE协议、NR协议以及应用于未来的通信系统中的相关协议，本申请对此不做限定。
本申请实施例中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电 缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够读取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，数字通用光盘(digital video disc，DVD))或者半导体介质(例如，固态硬盘(solid state disk，SSD))等。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (63)

  1. 一种无线通信的方法，其特征在于，包括：
    终端设备接收第一信息，所述第一信息用于指示第一小区在第一时间段的连续的参考位置，所述第一小区的覆盖范围随着卫星的移动而变化。
  2. 根据权利要求1所述的方法，其特征在于，所述第一信息包括第一参数，所述第一参数用于确定所述第一小区的参考位置的轨迹信息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一信息是对所述第一小区在第二时间段的多个参考位置进行估计得到的。
  4. 根据权利要求3所述的方法，其特征在于，所述第一小区在所述第二时间段的多个参考位置是根据以下信息中的一种或多种得到的：
    所述卫星在所述第二时间段的多个位置信息；
    所述第一小区与所述卫星的相对位置关系；以及
    第一设备提供的所述第一小区在所述第二时间段的多个参考位置。
  5. 根据权利要求1-4中任一项所述的方法，其特征在于，所述第一信息是基站估计得到的。
  6. 根据权利要求1-5中任一项所述的方法，其特征在于，所述第一信息的更新是基于条件触发的，触发所述第一信息更新的条件包括以下中的一种或多种：
    星历的更新；
    所述第一小区与所述卫星的相对位置关系改变；以及
    所述第一小区的参考位置改变。
  7. 根据权利要求1-6中任一项所述的方法，其特征在于，在所述终端设备接收第一信息之后，所述方法还包括：
    所述终端设备根据所述第一信息确定是否开启同级别或低级别的小区测量，所述同级别或低级别的小区测量用于小区重选。
  8. 根据权利要求7所述的方法，其特征在于，所述小区测量的开启是基于时间触发的。
  9. 根据权利要求8所述的方法，其特征在于，开启所述小区测量的时间是根据所述第一信息和触发小区重选的距离阈值确定的。
  10. 根据权利要求8或9所述的方法，其特征在于，所述终端设备根据所述第一信息确定是否开启同级别或低级别的小区测量，包括：
    如果所述终端设备根据所述第一信息确定的开启所述小区测量的时间未到达，所述终端设备不开启同级别或低级别的小区测量；和/或
    如果所述终端设备根据所述第一信息确定的开启所述小区测量的时间到达，所述终端设备开启同级别或低级别的小区测量。
  11. 根据权利要求8-10中任一项所述的方法，其特征在于，开启所述小区测量的时间是利用第一计时器指示的。
  12. 根据权利要求7所述的方法，其特征在于，所述小区测量的开启是基于距离触发的。
  13. 根据权利要求1-12中任一项所述的方法，其特征在于，在所述终端设备接收第一信息之后，所述方法还包括：
    所述终端设备启动第二计时器，所述第二计时器用于指示所述第一信息的有效时间。
  14. 根据权利要求1-13中任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备发送第一请求消息，所述第一请求消息用于获取所述第一信息。
  15. 根据权利要求1-14中任一项所述的方法，其特征在于，所述第一信息承载于系统信息中。
  16. 一种无线通信的方法，其特征在于，包括：
    基站发送第一信息，所述第一信息用于指示第一小区在第一时间段的连续的参考位置，所述第一小区的覆盖范围随着卫星的移动而变化。
  17. 根据权利要求16所述的方法，其特征在于，所述第一信息包括第一参数，所述第一参数用于确定所述第一小区的参考位置的轨迹信息。
  18. 根据权利要求16或17所述的方法，其特征在于，所述第一信息是对所述第一小区在第二时间段的多个参考位置进行估计得到的。
  19. 根据权利要求18所述的方法，其特征在于，所述第一小区在所述第二时间段的多个参考位置是根据以下信息中的一种或多种得到的：
    所述卫星在所述第二时间段的多个位置信息；
    所述第一小区与所述卫星的相对位置关系；以及
    第一设备提供的所述第一小区在所述第二时间段的多个参考位置。
  20. 根据权利要求16-19中任一项所述的方法，其特征在于，所述第一信息是所述基站估计得到的。
  21. 根据权利要求16-20中任一项所述的方法，其特征在于，所述第一信息的更新是基于条件触发的，触发所述第一信息更新的条件包括以下中的一种或多种：
    星历的更新；
    所述第一小区与所述卫星的相对位置关系改变；以及
    所述第一小区的参考位置改变。
  22. 根据权利要求16-21中任一项所述的方法，其特征在于，所述第一信息用于终端设备确定是否开启同级别或低级别的小区测量，所述同级别或低级别的小区测量用于小区重选。
  23. 根据权利要求22所述的方法，其特征在于，所述小区测量的开启是基于时间触发的。
  24. 根据权利要求23所述的方法，其特征在于，开启所述小区测量的时间是根据所述第一信息和触发小区重选的距离阈值确定的。
  25. 根据权利要求23或24所述的方法，其特征在于，开启所述小区测量的时间是利用第一计时器指示的。
  26. 根据权利要求22所述的方法，其特征在于，所述小区测量的开启是基于距离触发的。
  27. 根据权利要求16-26中任一项所述的方法，其特征在于，所述方法还包括：
    所述基站接收第一请求消息，所述第一请求消息用于获取所述第一信息。
  28. 根据权利要求16-27中任一项所述的方法，其特征在于，所述第一信息承载于系统信息中。
  29. 一种无线通信的装置，其特征在于，所述装置为终端设备，所述装置包括：
    接收模块，用于接收第一信息，所述第一信息用于指示第一小区在第一时间段的连续的参考位置，所述第一小区的覆盖范围随着卫星的移动而变化。
  30. 根据权利要求29所述的装置，其特征在于，所述第一信息包括第一参数，所述第一参数用于确定所述第一小区的参考位置的轨迹信息。
  31. 根据权利要求29或30所述的装置，其特征在于，所述第一信息是对所述第一小区在第二时间段的多个参考位置进行估计得到的。
  32. 根据权利要求31所述的装置，其特征在于，所述第一小区在所述第二时间段的多个参考位置是根据以下信息中的一种或多种得到的：
    所述卫星在所述第二时间段的多个位置信息；
    所述第一小区与所述卫星的相对位置关系；以及
    第一设备提供的所述第一小区在所述第二时间段的多个参考位置。
  33. 根据权利要求29-32中任一项所述的装置，其特征在于，所述第一信息是基站估计得到的。
  34. 根据权利要求29-33中任一项所述的装置，其特征在于，所述第一信息的更新是基于条件触发的，触发所述第一信息更新的条件包括以下中的一种或多种：
    星历的更新；
    所述第一小区与所述卫星的相对位置关系改变；以及
    所述第一小区的参考位置改变。
  35. 根据权利要求29-34中任一项所述的装置，其特征在于，所述装置还包括：
    确定模块，用于根据所述第一信息确定是否开启同级别或低级别的小区测量，所述同级别或低级别的小区测量用于小区重选。
  36. 根据权利要求35所述的装置，其特征在于，所述小区测量的开启是基于时间触发的。
  37. 根据权利要求36所述的装置，其特征在于，开启所述小区测量的时间是根据所述第一信息和触发小区重选的距离阈值确定的。
  38. 根据权利要求36或37所述的装置，其特征在于，所述终端设备根据所述第一信息确定是否开启同级别或低级别的小区测量，包括：
    如果所述终端设备根据所述第一信息确定的开启所述小区测量的时间未到达，所述终端设备不开启同级别或低级别的小区测量；和/或
    如果所述终端设备根据所述第一信息确定的开启所述小区测量的时间到达，所述终端设备开启同级别或低级别的小区测量。
  39. 根据权利要求36-38中任一项所述的装置，其特征在于，开启所述小区测量的时间是利用第一计时器指示的。
  40. 根据权利要求35所述的装置，其特征在于，所述小区测量的开启是基于距离触发的。
  41. 根据权利要求29-40中任一项所述的装置，其特征在于，所述装置还包括：
    启动模块，用于启动第二计时器，所述第二计时器用于指示所述第一信息的有效时间。
  42. 根据权利要求29-41中任一项所述的装置，其特征在于，所述装置还包括：
    发送模块，用于发送第一请求消息，所述第一请求消息用于获取所述第一信息。
  43. 根据权利要求29-42中任一项所述的装置，其特征在于，所述第一信息承载于系统信息中。
  44. 一种无线通信装置，其特征在于，所述装置为基站，所述装置包括：
    发送模块，用于发送第一信息，所述第一信息用于指示第一小区在第一时间段的连续的参考位置，所述第一小区的覆盖范围随着卫星的移动而变化。
  45. 根据权利要求44所述的装置，其特征在于，所述第一信息包括第一参数，所述第一参数用于确定所述第一小区的参考位置的轨迹信息。
  46. 根据权利要求44或45所述的装置，其特征在于，所述第一信息是对所述第一小区在第二时间段的多个参考位置进行估计得到的。
  47. 根据权利要求46所述的装置，其特征在于，所述第一小区在所述第二时间段的多个参考位置是根据以下信息中的一种或多种得到的：
    所述卫星在所述第二时间段的多个位置信息；
    所述第一小区与所述卫星的相对位置关系；以及
    第一设备提供的所述第一小区在所述第二时间段的多个参考位置。
  48. 根据权利要求44-47中任一项所述的装置，其特征在于，所述第一信息是所述基站估计得到的。
  49. 根据权利要求44-48中任一项所述的装置，其特征在于，所述第一信息的更新是基于条件触发的，触发所述第一信息更新的条件包括以下中的一种或多种：
    星历的更新；
    所述第一小区与所述卫星的相对位置关系改变；以及
    所述第一小区的参考位置改变。
  50. 根据权利要求44-49中任一项所述的装置，其特征在于，所述第一信息用于终端设备确定是否开启同级别或低级别的小区测量，所述同级别或低级别的小区测量用于小区重选。
  51. 根据权利要求50所述的装置，其特征在于，所述小区测量的开启是基于时间触发的。
  52. 根据权利要求51所述的装置，其特征在于，开启所述小区测量的时间是根据所述第一信息和触发小区重选的距离阈值确定的。
  53. 根据权利要求51或52所述的装置，其特征在于，开启所述小区测量的时间是利用第一计时器指示的。
  54. 根据权利要求50所述的装置，其特征在于，所述小区测量的开启是基于距离触发的。
  55. 根据权利要求44-54中任一项所述的装置，其特征在于，所述装置还包括：
    接收模块，用于接收第一请求消息，所述第一请求消息用于获取所述第一信息。
  56. 根据权利要求44-55中任一项所述的装置，其特征在于，所述第一信息承载于系统信息中。
  57. 一种无线通信装置，其特征在于，所述装置为终端设备，所述装置包括收发器、存储器和处理器，所述存储器用于存储程序，所述处理器用于调用所述存储器中的程序，以使所述装置执行如权利要求1-15中任一项所述的方法。
  58. 一种无线通信装置，其特征在于，所述装置为基站，所述装置包括收发器、存储器和处理器，所述存储器用于存储程序，所述处理器用于调用所述存储器中的程序，以使所述装置执行如权利要求16-28中任一项所述的方法。
  59. 一种装置，其特征在于，包括处理器，用于从存储器中调用程序，以使所述装置执行如权利要求1-28中任一项所述的方法。
  60. 一种芯片，其特征在于，包括处理器，用于从存储器调用程序，使得安装有所述芯片的设备执行如权利要求1-28中任一项所述的方法。
  61. 一种计算机可读存储介质，其特征在于，其上存储有程序，所述程序使得计算机执行如权利要求1-28中任一项所述的方法。
  62. 一种计算机程序产品，其特征在于，包括程序，所述程序使得计算机执行如权利要求1-28中任一项所述的方法。
  63. 一种计算机程序，其特征在于，所述计算机程序使得计算机执行如权利要求1-28中任一项所述的方法。
PCT/CN2023/083339 2023-03-23 2023-03-23 无线通信的方法和装置 Ceased WO2024192760A1 (zh)

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