WO2024159585A1 - 用于无线通信的方法及装置 - Google Patents

用于无线通信的方法及装置 Download PDF

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Publication number
WO2024159585A1
WO2024159585A1 PCT/CN2023/082071 CN2023082071W WO2024159585A1 WO 2024159585 A1 WO2024159585 A1 WO 2024159585A1 CN 2023082071 W CN2023082071 W CN 2023082071W WO 2024159585 A1 WO2024159585 A1 WO 2024159585A1
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WO
WIPO (PCT)
Prior art keywords
terminal device
cell
network device
sub
parameter
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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/CN2023/082071
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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
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Filing date
Publication date
Application filed by Quectel Wireless Solutions Co Ltd filed Critical Quectel Wireless Solutions Co Ltd
Priority to KR1020257023532A priority Critical patent/KR20250121422A/ko
Priority to JP2025544464A priority patent/JP2026504398A/ja
Priority to EP23919159.6A priority patent/EP4661501A4/en
Publication of WO2024159585A1 publication Critical patent/WO2024159585A1/zh
Priority to US18/823,492 priority patent/US12328617B2/en
Priority to US19/230,278 priority patent/US20250301361A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/322—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by location data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
    • G01S19/25—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS
    • G01S19/258—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS relating to the satellite constellation, e.g. almanac, ephemeris data, lists of satellites in view
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H04W36/083—Reselecting an access point wherein at least one of the access points is a moving node
    • 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
    • H04W36/26—Reselection being triggered by specific parameters by agreed or negotiated communication parameters
    • 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
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

Definitions

  • the present application relates to the field of communication technology, and more specifically, to a method and device for wireless communication.
  • Non-terrestrial network (NTN) systems have strong mobility.
  • NTN Non-terrestrial network
  • the terminal device can perform neighbor cell measurements based on the reference position of the service cell provided by the network equipment.
  • the NTN cell moves with the network equipment (eg, a quasi-earth mobile cell)
  • changes in the coverage area of the serving cell may be detrimental to the terminal equipment performing neighbor cell measurements.
  • the present application provides a method and apparatus for wireless communication.
  • the following introduces various aspects involved in the embodiments of the present application.
  • a method for wireless communication comprising: a terminal device performs neighbor cell measurement in an NTN cell based on a first parameter, wherein the first parameter is associated with one or more of the following information: a distance between the terminal device and a network device corresponding to the NTN cell; a height from the ground of the network device corresponding to the NTN cell; a directional angle of an antenna of the network device corresponding to the NTN cell; and a sub-area in the NTN cell.
  • a method for wireless communication comprising: a network device sends a first parameter to a terminal device, the first parameter is used by the terminal device to perform neighbor cell measurement in an NTN cell, the first parameter is associated with one or more of the following information: the distance between the terminal device and the network device; the height of the network device from the ground; the azimuth angle of the antenna of the network device; and a sub-area in the NTN cell.
  • a device for wireless communication wherein the device is a terminal device, and the terminal device comprises: a measurement unit, configured to perform neighbor cell measurement in an NTN cell based on a first parameter, wherein the first parameter is associated with one or more of the following information: the distance between the terminal device and the network device; the height of the network device from the ground; the azimuth angle of the antenna of the network device; and a sub-area in the NTN cell.
  • a device for wireless communication wherein the device is a network device, and the network device includes: a sending unit, used to send a first parameter to the terminal device, the first parameter is used by the terminal device to perform neighbor cell measurement in the NTN cell, and the first parameter is associated with one or more of the following information: the distance between the terminal device and the network device; the height of the network device from the ground; the azimuth angle of the antenna of the network device; and a sub-area in the NTN cell.
  • a communication device comprising a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory to execute the method described in the first aspect or the second aspect.
  • a device comprising a processor, configured to call a program from a memory to execute the method described in the first aspect or the second aspect.
  • a chip comprising a processor for calling a program from a memory so that a device equipped with the chip executes the method described in the first aspect or the second aspect.
  • a computer-readable storage medium on which a program is stored, wherein the program enables a computer to execute the method described in the first aspect or the second aspect.
  • a computer program product comprising a program, wherein the program enables a computer to execute the method as described in the first aspect or the second aspect.
  • a computer program is provided, wherein the computer program enables a computer to execute the method as described in the first aspect or the second aspect.
  • the terminal device in the embodiment of the present application can perform neighboring cell measurement in the NTN cell based on the first parameter and its associated information.
  • the parameter can indicate the timing for the terminal device to trigger neighbor cell measurement based on the sub-area information where the terminal device is located, or more accurate relative position information between the terminal device and the network device, thereby improving the effect of the terminal device performing neighbor cell measurement.
  • FIG1 is a wireless communication system applied in an embodiment of the present application.
  • FIG. 2 is an NTN system applied in an embodiment of the present application.
  • FIG. 3 is another NTN system applied in the embodiment of the present application.
  • FIG4 is a schematic diagram of a method for wireless communication provided in an embodiment of the present application.
  • FIG5 is a schematic diagram of an NTN cell division method provided in an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a possible implementation of the method shown in FIG. 4 .
  • FIG. 7 is a schematic diagram of a possible implementation manner in which a mobile cell terminal device determines the sub-area in which it is located.
  • FIG8 is a schematic diagram of another NTN cell division method provided in an embodiment of the present application.
  • FIG. 9 is a schematic diagram of another NTN cell division method provided in an embodiment of the present application.
  • FIG10 is a schematic diagram of the structure of a device for wireless communication provided in an embodiment of the present application.
  • FIG. 11 is a schematic diagram of the structure of another device for wireless communication provided in an embodiment of the present application.
  • FIG. 12 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application.
  • the embodiments of the present application can be applied to various communication systems.
  • 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
  • new rad The present invention relates to a wireless communication system comprising: a sixth-generation (6th-generation, 6G) mobile communication system, an evolution system of an NR system, an LTE-U system on an unlicensed spectrum, an NR-U system on an unlicensed spectrum, an NTN system, a universal mobile telecommunication system (UMTS), a wireless local area network (WLAN), a wireless fidelity (WiFi), and a fifth-generation (5G) communication system.
  • the embodiments of the present application can also be applied to other communication systems, such as future communication systems.
  • the future communication system can, for example, be a sixth-generation (6G) mobile communication system,
  • a communication system can support one or more of the following communications: device to device (D2D) communication, machine to machine (M2M) communication, machine type communication (MTC), vehicle to vehicle (V2V) communication, and vehicle to everything (V2X) communication, etc.
  • 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 may be applied to an unlicensed spectrum.
  • the unlicensed spectrum may also be considered as a shared spectrum.
  • the communication system in the embodiment of the present application may also be applied to an authorized spectrum.
  • the authorized spectrum may also be considered as a dedicated spectrum.
  • the embodiments of the present application can be applied to a terrestrial communication network (TN) system, and can also be applied to an NTN system.
  • the NTN system can include a 4G-based NTN system, an NR-based NTN system, an Internet of Things (IoT)-based NTN system, and a narrowband Internet of Things (NB-IoT)-based NTN system.
  • IoT Internet of Things
  • NB-IoT narrowband Internet of Things
  • the communication system may include one or more terminal devices.
  • the terminal devices mentioned in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (mobile Terminal, MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • UE user equipment
  • MS mobile station
  • MS mobile station
  • MT mobile terminal
  • remote station remote terminal, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • the terminal device may be a station (STATION, ST) in a WLAN.
  • the terminal device may be 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, an in-vehicle device, a wearable device, a terminal device in a next-generation communication system (such as an NR system), or a terminal device in a future-evolved public land mobile network (PLMN) network, etc.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • PLMN public land mobile network
  • the terminal device may be a device that provides voice and/or data connectivity to a user.
  • the terminal device may be a handheld device, a vehicle-mounted device, etc. with a wireless connection function.
  • the terminal device may be a mobile phone, a tablet computer, a laptop, 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.
  • MID mobile internet device
  • VR virtual reality
  • AR augmented reality
  • the terminal device can be deployed on land.
  • the terminal device can be deployed indoors or outdoors.
  • the terminal device can be deployed on the water, such as on a ship.
  • the terminal device can be deployed in the air, such as on an airplane, a balloon, and a satellite.
  • the communication system may also include one or more network devices.
  • the network device in the embodiment of the present application may be a device for communicating with the terminal device, and the network device may also be referred to as an access network device or a wireless access network device.
  • the network device may be, for example, a base station.
  • the network device in the embodiment of the present application may refer to a radio access network (RAN) node (or device) that connects the terminal device to a wireless network.
  • RAN radio access network
  • Base station can broadly cover various names as follows, or be replaced with the following names, such as: Node B, evolved Node B (eNB), next generation Node B (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, base band unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc.
  • the base station may 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 may also refer to a communication module, a modem or a chip used to be arranged in the aforementioned device or apparatus.
  • the base station may also be a mobile switching center and a device that performs the base station function in D2D, V2X, and 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 may 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 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 network device may also be a base station set up in a location such as land or water.
  • a network device may provide services for a cell, and a terminal device may communicate with the network device through transmission resources (e.g., frequency domain resources, or spectrum resources) used by the cell.
  • the cell may be a cell corresponding to a network device (e.g., a base station).
  • the cell may 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.
  • Fig. 1 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, which may be a device for communicating with a terminal device 120 (or referred to as a communication terminal or terminal).
  • the network device 110 may provide communication coverage for a specific geographical area and may communicate with terminal devices located within the coverage area.
  • FIG1 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.
  • Fig. 2 is a schematic diagram of an architecture of the NTN system mentioned above.
  • the NTN system 200 shown in Fig. 2 uses a satellite 210 as an air platform.
  • the satellite radio access network includes a satellite 210, a service link 220, a feeder link 230, a terminal device 240, a gateway 250, and a network 260 including a base station and a core network.
  • Satellite 210 is a spacecraft based on a space platform.
  • Service link 220 refers to the link between satellite 210 and terminal device 240.
  • Feeder link 230 refers to the link between gateway 250 and satellite 210.
  • Earth-based gateway 250 connects satellite 210 to a base station or core network, depending on the choice of architecture.
  • the NTN architecture shown in FIG2 is a bent-pipe transponder architecture.
  • the base station is located on the earth behind the gateway 250, and the satellite 210 acts as a relay.
  • the satellite 210 operates as a repeater that forwards the feeder link 230 signal to the service link 220, or forwards the service link 220 signal to the feeder link 230.
  • the satellite 210 does not have the function of a base station, and the communication between the terminal device 240 and the base station in the network 260 needs to be relayed by the satellite 210.
  • Fig. 3 is another schematic diagram of the architecture of the NTN system.
  • the NTN system 300 shown in Fig. 3 also uses a satellite 310 as an air platform.
  • a base station 312 on the satellite 310 there is a base station 312 on the satellite 310, and the network 360 behind the gateway 350 only includes a core network.
  • the NTN architecture shown in Figure 3 is a regenerative transponder architecture.
  • a satellite 310 carries a base station 312, which can be directly connected to an earth-based core network via a link.
  • the satellite 310 has the function of a base station, and the terminal device 340 can communicate directly with the satellite 310. Therefore, the satellite 310 can be called a network device.
  • the communication system of the architecture shown in FIG. 2 and FIG. 3 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.
  • the wireless communication system shown in Figures 1 to 3 may also include other network entities such as a mobility management entity (MME) and an access and mobility management function (AMF), but the embodiment of the present application does not limit this.
  • MME mobility management entity
  • AMF access and mobility management function
  • the device with communication function in the network/system in the embodiment of the present application can be called a communication device.
  • the communication device may include a network device 110 and a terminal device 120 with communication function, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here; the communication device may also include other devices in the communication system 100, such as other network entities such as a network controller and a mobile management entity, which is not limited in the embodiment of the present application.
  • communication systems e.g., 5G
  • 5G communication systems
  • NTN including the satellite segment, a part of the recognized 3rd generation partnership project (3GPP) 5G connection infrastructure.
  • 3GPP 3rd generation partnership project
  • LEO low earth orbit
  • MEO medium earth orbit
  • GEO geostationary earth orbit
  • HEO high elliptical orbit
  • LEO is an orbit centered on the earth with an altitude of 2,000 kilometers or less, or at least 11.25 cycles per day, and an eccentricity of less than 0.25.
  • Most man-made objects in outer space are located in LEO.
  • LEO satellites orbit the earth at high speed (mobility), but in a predictable or determined orbit.
  • Satellites at different orbital altitudes have different orbital periods.
  • LEO Typical altitude is 250-1500 km, orbital period is 90-120 minutes.
  • MEO Typical altitude is 5000-25000 km, orbital period is 3-15 hours.
  • GEO Altitude is about 35786 kilometers, orbital period is 24 hours.
  • NTN refers to a network or network segment that uses radio frequency (RF) resources on satellite or unmanned aerial system (UAS) platforms.
  • RF radio frequency
  • UAS unmanned aerial system
  • Typical scenarios of NTN for accessing terminal devices involve NTN transparent payload or NTN regenerative payload.
  • Figures 2 and 3 above show the architecture of two NTN systems using satellite as an example. Among them, the bent pipe transponder architecture shown in Figure 2 corresponds to the NTN transparent payload, and the regenerative transponder architecture shown in Figure 3 corresponds to the NTN regenerative payload.
  • the coverage of the service cell is generally relatively large.
  • the diameter of the NTN cell is at least 50km.
  • the NTN cell can cover multiple cities where TN cells are deployed, and can also cover remote areas or ocean areas where there are no TN cells.
  • the cells projected by the satellite to the ground can be fixed relative to the ground or move with the satellite.
  • the cells projected by LEO satellites to the ground usually include two modes: quasi-Earth fixed cells (fixed cells) and quasi-Earth moving cells (moving cells).
  • a cell that is relatively stationary relative to the ground can refer to a service cell that covers a fixed geographical area.
  • different LEO satellites cover the same area on the ground by adjusting the antenna pointing angle; when a LEO satellite cannot cover the area, another LEO satellite takes over.
  • the cell projected on the ground can also be a fixed cell.
  • a mobile cell may refer to a service cell whose covered geographic area changes.
  • a cell projected by a LEO satellite to the ground may move with the satellite.
  • the cell projected by a LEO satellite to the ground is a mobile cell.
  • the LEO satellite is an independent base station or a relay base station
  • the mobile cell moves with the LEO satellite, and the relative distance between the LEO satellite and the terminal device is constantly changing.
  • the signal of the LEO satellite may not cover the terminal device. If the network deployment is relatively complete, the next LEO satellite will cover the terminal device. Since the satellite system is spherical, the next LEO satellite may come from all angles.
  • the projection position of the satellite perpendicular to the ground can be called a sub-satellite point, or a reference position or reference point.
  • the trajectory of the satellite reference position on the ground is usually aligned with the satellite orbit. In other words, the trajectory of the satellite reference point on the ground can be considered as the projection of the satellite orbit.
  • the operating parameters of the satellite can be represented by ephemeris data.
  • Ephemeris data usually has two formats, one is orbital parameters and the other is position, velocity, time (PVT) parameters. Satellite orbital parameters or PVT parameters can indicate the position coordinates of the satellite relative to the ground.
  • the terminal device can determine the future trajectory of the satellite through the ephemeris data, and thus determine whether measurement or switching is required.
  • NTN systems may include quasi-geo-fixed systems and mobile unit systems.
  • the solutions of different systems are different.
  • the network equipment may provide the terminal device with the time when its public cell stops serving. All idle/inactive terminal devices in the cell may perform cell reselection before the cell stop time.
  • the network equipment may provide the terminal device with a reference location and distance threshold of the serving cell. If the distance between the terminal device and the reference location of the current serving cell is greater than the distance threshold, the terminal device shall perform neighboring cell measurement.
  • the specification specifies the location-based measurement start rule and the time-based measurement start rule for NTN quasi-terrestrial fixed cells.
  • a distance threshold and a serving cell reference position are introduced. If the distance between the terminal device and the serving cell reference position is less than the distance threshold and satisfies the traditional signal reception condition, the terminal device may not perform the priority-based neighboring cell measurement.
  • the signal reception condition may be a reference signal received power (RSRP) condition or a reference signal received quality (RSRQ) condition.
  • Priority-based neighboring cell measurement refers to neighboring cell measurement based on NR frequencies with equal or lower priority or between frequencies, or between radio access technologies (RAT) with lower priority.
  • the rule introduces the cell stop time of the serving cell, that is, the time when the cell stops covering the current area. If a cell stop time is configured, the terminal device shall start measurements of neighboring cells before the cell stop time, regardless of whether the above-mentioned location conditions or traditional RSRP/RSRQ conditions are met.
  • the coverage area of the NTN cell will move with the network equipment. Even if the terminal device is fixed, the relative position of the terminal device and the network equipment will change. In other words, for mobile unit systems, the positions of the terminal device and the service cell may be changing.
  • LEO low-orbit
  • the typical LEO satellite speed is 7.56km/s. As the LEO satellite moves, the satellite's footprint slides on the earth.
  • the diameter of the NTN cell is at least 50km, it means that within 6.61 seconds, all idle/inactive terminal devices in the cell need to be distributed.
  • NTN cells usually provide much larger coverage than TN cells.
  • NTN cells will cover a large number of low-mobility NB-IoT terminal devices.
  • NB-IoT terminal devices move slowly, due to the mobility of network equipment, The distance between the network equipment and the terminal device can change significantly. Therefore, for a terminal device in a mobile cell, the terminal device needs more accurate information to perform neighbor cell measurements before the network equipment stops serving the location.
  • an embodiment of the present application proposes a method for wireless communication.
  • the method instructs a terminal device to perform neighboring cell measurement through a first parameter related to the terminal device location information.
  • the location information of the terminal device can indicate the relative position relationship between the terminal device and the serving cell, which helps the terminal device to better perform measurement/switching, etc.
  • Figure 4 is written from the perspective of the interaction between the terminal device and the network device.
  • the terminal device determines the timing of triggering the neighbor cell measurement through communication with the network device.
  • the terminal device may be any of the aforementioned terminal devices that communicate with the network device in the NTN cell, or may be a terminal device that communicates in other terrestrial mobile cells.
  • the terminal device may be a communication device with low mobility in NB-IoT.
  • the terminal device may be a communication device in an idle or inactive state in an NTN cell.
  • the terminal device may receive broadcast information or system information sent by a network device.
  • the terminal device may be a communication device in an active state.
  • the terminal device may receive broadcast information or system information sent by a network device, and may also receive proprietary signaling sent by a network device. Among them, proprietary signaling can reduce the consumption of public resources.
  • the network device may be a communication device that provides network services in the NTN cell where the terminal device is located.
  • the network device may be a satellite as an independent base station, or an unmanned aerial vehicle system as a relay base station.
  • the NTN cell may be a service cell whose coverage area is stationary relative to the ground, such as a quasi-terrestrial fixed cell.
  • the NTN cell may also be a service cell whose coverage area moves with the network equipment, such as a quasi-terrestrial mobile cell. This is not limited here.
  • step S410 the terminal device receives a first parameter sent by the network device.
  • the first parameter is used to instruct the terminal device to perform neighboring cell measurement.
  • the first parameter can indicate the relative position relationship between the terminal device and the current service cell, so that the terminal device can determine whether it is in the edge area of the service cell, thereby better triggering the neighboring cell measurement.
  • the first parameter can be associated with one or more information.
  • This information can be the distance between the terminal device and the network device, which can also be called the service link distance, represented by L.
  • the threshold of the service link distance is related to the coverage range of the NTN cell.
  • This information can also be the height of the network device from the ground, which can also be called the height of the network device vertical to the ground.
  • This information can also be the azimuth angle of the antenna of the network device, which is used to determine the coverage area of the NTN cell.
  • This information can also be a sub-area in the NTN cell.
  • the sub-area can include multiple virtual areas after fine division by NTN.
  • the azimuth angle of the antenna of the network device may be the azimuth angle of the antenna setting, or the azimuth angle corresponding to the network device.
  • the azimuth angle of the antenna of the network device may be the maximum azimuth angle that the antenna can be set to, or the azimuth angle when the network service is currently provided. Therefore, the azimuth angle of the antenna may also be referred to as the maximum azimuth angle or the beam antenna angle.
  • the azimuth angle of the satellite antenna may be adjusted within the range of the maximum azimuth angle to adapt to the coverage range of the NTN cell.
  • the azimuth angle of the antenna may also refer to the azimuth angle of the network device or the satellite.
  • the azimuth angle of the antenna is the azimuth angle of the satellite.
  • the relative position information between the terminal device and the satellite may be determined, and the coverage area of the corresponding NTN cell may also be determined.
  • Reasonable sub-area division can facilitate the terminal device to perform measurement/switching.
  • the switching of the terminal device may include switching between NTN-NTN, NTN-TN, etc.
  • the terminal device can determine whether it is located in the core position of the NTN cell coverage area by the sub-area where it is located, thereby reducing unnecessary measurements.
  • the sub-areas in the NTN cell are determined based on the coverage angle of the network device.
  • the current coverage area of the network device can be determined by the azimuth angle of the antenna of the network device.
  • the angle formed by the line connecting the network device and the coverage position and the vertical line between the network device and the ground is the coverage angle of the network device.
  • the coverage angle corresponding to the terminal device can be determined according to the ratio of the distance between the terminal device and the network device and the height of the network device relative to the ground.
  • the coverage angle can also be called the offset angle. Terminal devices at different locations will correspond to different coverage angles.
  • the coverage angle is the azimuth angle of the antenna. Therefore, the coverage angle of the network device is less than or equal to the azimuth angle of the antenna.
  • dividing the NTN cell based on the coverage angle refers to determining multiple coverage angles corresponding to multiple sub-areas according to the azimuth angle of the antenna.
  • the multiple coverage angles may be an arithmetic progression or may not be an arithmetic progression.
  • the coverage angles corresponding to the multiple sub-areas may be 15 degrees, 30 degrees, 45 degrees and 60 degrees, respectively. That is, the NTN cell is divided into four sub-areas based on the azimuth angle, and a boundary of each sub-area is determined by the coverage angles corresponding to the four sub-areas.
  • the coverage angle of the satellite is ⁇ max , and this angle can be divided into ⁇ 1 , ⁇ 2 , ⁇ 3 ... ⁇ i , where ⁇ 1 ⁇ 2 ⁇ 3 ... ⁇ i ⁇ max .
  • the multiple sub-areas divided by NTN can be multiple circular or annular areas with the projection position of the network equipment vertical to the ground as the center of the circle.
  • N is a natural number greater than 1
  • the N coverage angles corresponding to the boundaries of the N sub-areas away from the center of the circle meet the following conditions:
  • ⁇ i is the coverage angle corresponding to the boundary of the i-th sub-area in the N sub-areas away from the center of the circle
  • i is a natural number from 1 to N-1
  • ⁇ N is the direction angle of the antenna.
  • the multiple sub-areas divided by the NTN cell may equally or unequally divide the coverage area of the NTN cell.
  • the areas corresponding to the N sub-areas may equally divide the NTN cell.
  • the areas of the N sub-areas may be equal.
  • the areas corresponding to the N sub-areas may be partially equal or completely unequal.
  • the sub-area in the NTN cell can also be determined based on the projection position of the network device perpendicular to the ground.
  • the projection position can be referred to as the first position.
  • the NTN can determine the boundary of the sub-area based on the coverage angle, and the boundary of the sub-area includes a curve with the first position as the center.
  • the first position can be determined based on the coordinates of the network device.
  • the terminal device can determine the orbital parameters or PVT parameters of the network device based on the ephemeris data corresponding to the network device, and these parameters can determine the coordinates of the network device projected to the ground. Based on the first position and the coverage angle, the location information of multiple sub-areas of the NTN cell can be determined.
  • the NTN cell when the NTN cell is divided based on the coverage angle, other multiple information may also be considered. That is, multiple virtual sub-areas in the NTN cell may also be determined based on one or more other relevant information.
  • Other relevant information may be the coordinates of the network device, the geographical environment of the NTN cell coverage area, the distribution of the network TN cells in the NTN cell coverage area, the restrictions on the NTN cell signal interaction, the measurement requirements and/or switching requirements of the terminal device, and the auxiliary information provided by the terminal device. For example, when the NTN cell is divided into N sub-areas, increasing the value of N according to the above other relevant information can increase the number of sub-areas and divide the NTN cell more finely.
  • the sub-areas in the NTN cell can be adaptively adjusted according to the coordinates of the network device and the coverage of the TN. For example, when the coordinates show that the network device is located in a densely populated area, or there are many TN cells in the NTN cell, the number of sub-areas can be increased. By increasing the number of sub-areas, the NTN cell can be more accurately switched with the TN cell.
  • the sub-areas in the NTN cell can be adaptively adjusted according to the geographical environment of the coverage area. For example, when the main area covered by the NTN cell is the ocean or desert, the number of sub-areas can be reduced. This is because there are fewer TN cells in this area and the probability of handover with the TN cell is small.
  • the sub-areas in the NTN cell can be determined based on the restrictions on the signal interaction of the NTN cell. For example, when there are many TN cells in the NTN cell, if there are many sub-areas, the terminal device needs to perform more signal interactions with the network device to meet the requirements of measuring or switching in different sub-areas. When the network device is a satellite, the transmission delay is large, and the number of sub-areas can be reduced to reduce the interaction.
  • the sub-areas in the NTN cell can be determined according to the measurement requirements and/or switching requirements of the terminal device. For example, in order to reduce power consumption, when the terminal device requires high accuracy in measurement or switching, the number of sub-areas can be increased to reduce the judgment deviation of subsequent measurement and switching.
  • the sub-areas in the NTN cell may also be determined based on other auxiliary information provided by the terminal device.
  • the terminal device may provide the network device with environmental information about its surroundings, or location information determined by other means, etc.
  • the network device may determine the number of sub-areas based on the auxiliary information provided by multiple terminal devices.
  • the communication requirements and the auxiliary information provided by the terminal equipment can also be considered to make the division of the NTN cell more accurate and better adapted to the covered geographical area.
  • the projection position of the network device perpendicular to the ground is the first position 510
  • the direction angle of the antenna is the maximum direction angle ⁇ max of the network device.
  • the NTN cell is divided into three sub-areas, namely NTN1, NTN2 and NTN3.
  • the boundaries of the three sub-areas are centered on the first position 510.
  • the boundary curve 520 of the sub-area NTN1 is a circle centered on the first position 510.
  • the boundaries of the sub-area NTN2 are curves 520 and 530, wherein the curve 530 is also a circle centered on the first position 510.
  • the boundaries of the sub-area NTN2 are curves 530 and 540, wherein the curve 540 is also a circle centered on the first position 510.
  • the coverage angle of the network device corresponding to the boundaries of multiple sub-areas is less than or equal to the direction angle of the antenna.
  • the coverage angle corresponding to the boundary curve 520 of the sub-area NTN1 is ⁇ 1 , which is less than ⁇ max .
  • the coverage angles corresponding to the two boundaries of the sub-area NTN2 are They are ⁇ 1 and ⁇ 2 respectively, and are both smaller than ⁇ max .
  • the coverage angle corresponding to the inner boundary curve 530 of the sub-region NTN3 is ⁇ 2
  • the coverage angle corresponding to the outer boundary curve 540 is equal to ⁇ max .
  • the coverage angle corresponding to the terminal equipment in the sub-area will be within the range of the coverage angle corresponding to the boundary of the sub-area.
  • the coverage angle corresponding to the terminal equipment in the sub-area NTN1 is less than or equal to ⁇ 1 .
  • the NTN cell division method described in conjunction with FIG5 can be applied to quasi-terrestrial fixed cells and quasi-terrestrial mobile cells.
  • the relative position of the terminal device and the network device changes differently. This will be described in detail later.
  • the NTN cell division method shown in Figure 5 can better unify the coverage division of the ground TN cellular network.
  • the NTN network can be better coupled with the ground cellular system to reduce the blind area of measurement.
  • the division method of the antenna NTN cell can also include many other methods, which will be briefly described in conjunction with Figures 8 and 9.
  • the first parameter can instruct the terminal device to perform neighboring cell measurement through the location information of the terminal device in the NTN cell.
  • the location information can be used to determine the relative location information between the terminal device and the corresponding network device.
  • the relative location information can be used to determine whether the terminal device is in the edge area of the current service cell. For example, the terminal device can determine the time to reach the edge through the distance between the terminal device and the network device associated with the first parameter.
  • the relative location information can be used to determine the sub-area where the terminal device is located. Different measurement/switching modes can be set for sub-areas in the NTN cell, and the terminal device can perform reasonable measurements based on the sub-area information where it is located.
  • the relative position information between the terminal device and the network device may include the relative distance or relative angle between the terminal device and the network device.
  • the first parameter may directly indicate the relative position information by associating multiple information.
  • the first parameter may be the distance between the terminal device and the network device.
  • the terminal device may determine the relative position information by multiple associated information.
  • the first parameter may determine the coverage angle of the network device corresponding to the terminal device by the distance between the terminal device and the network device and the height of the network device from the ground.
  • the first parameter may be directly one or more of the above-mentioned associated information.
  • the first parameter received by the terminal device is the height of the network device from the ground, or the azimuth angle of the antenna of the network device, or the division method of the sub-area.
  • the first parameter may be other information for obtaining the above-mentioned one or more associated information.
  • the first parameter may be the ephemeris data corresponding to the service satellite. If the satellite orbit parameters in the ephemeris data are available, the terminal device can know and predict the position of the service satellite and the position coordinates of the sub-satellite point at any time. The terminal device can determine the relative position information with the service satellite through these data.
  • the first parameter may be the relevant information of the sub-area in the NTN cell.
  • the terminal device can determine the sub-area in which it is located through these relevant information, thereby determining the relative position relationship between the terminal device and the network device.
  • the first parameter may be a reference signal sent by the network device.
  • the terminal device can determine the distance between the terminal device and the network device based on the received RSRP.
  • step S420 the terminal device performs neighbor cell measurement in the NTN cell based on the first parameter.
  • Neighboring cell measurement may also be referred to as neighboring cell measurement. Neighboring cell measurement may include measurement of neighboring cells, and may also include related measurements for triggering neighboring cell measurement. When the terminal device performs neighboring cell measurement, the neighboring cell may be an NTN cell or a TN cell, which is not limited here.
  • the terminal device may perform neighbor cell measurement in preparation for cell reselection. That is, after the terminal device triggers neighbor cell measurement, the measurement result of the neighbor cell may be used by the terminal device for cell reselection.
  • the first parameter may indicate the relative position relationship between the terminal device and the serving cell.
  • the associated information of the first parameter may be used to determine the relative position relationship to indicate whether the terminal device triggers neighbor cell measurement.
  • the terminal device can perform neighbor cell measurement based on a variety of triggering factors, which can be time, distance, angle, or the sub-area where the terminal device is located.
  • the terminal device may trigger neighbor cell measurement based on time.
  • the terminal device may determine the time to reach the edge of the NTN cell based on the first parameter, and determine whether to trigger neighbor cell measurement based on the time.
  • the serving cell may provide a service outage time.
  • the terminal device may set a time measurement threshold in combination with the service outage time and its own motion information.
  • the terminal device triggers neighbor cell measurement.
  • the terminal device and the serving cell move relative to each other, the terminal device may also determine whether to trigger neighbor cell measurement based on the time measurement threshold.
  • the network device may notify the terminal device of the first parameter through broadcast information/system information/proprietary signaling.
  • the terminal device may determine the second parameter based on the first parameter, and the second parameter is used to indicate the time when the terminal device arrives at the edge of the NTN cell.
  • the first parameter includes the ephemeris data of the network device
  • the terminal device may determine the distance between the terminal device and the network device and the height of the network device from the ground based on the ephemeris data, thereby determining the corresponding coverage angle.
  • the second parameter may also be determined based on the azimuth angle of the antenna. The time required for the terminal device to reach the edge of the cell can be determined by the azimuth angle of the antenna and the corresponding coverage angle of the terminal device, thereby determining whether to perform neighboring cell measurement.
  • the time t at which the terminal device arrives at the edge of the NTN cell can be determined by the following formula:
  • ⁇ N is the directional angle of the antenna of the network device ( ⁇ max shown in FIG5 )
  • ⁇ n is the coverage angle of the network device corresponding to the location of the terminal device
  • ⁇ is the relative angular velocity
  • ⁇ ⁇ 1 - ⁇ 2
  • ⁇ 1 is the angular velocity of the network device
  • ⁇ 2 is the angular velocity of the earth's rotation.
  • the terminal device may also set a time measurement threshold. When the time when the terminal device reaches the edge of the NTN cell is less than the time measurement threshold, the neighboring cell measurement may be triggered.
  • the time measurement thresholds of different terminal devices may be the same or different.
  • the network device can inform the terminal device of the division method of the NTN cell.
  • the coverage of the NTN cell is large. If all terminal devices in the NTN area set the calculation and communication of the time to reach the edge of the NTN cell respectively, the amount of calculation is large.
  • the terminal device can also determine whether to trigger the neighboring cell measurement based on the time zone where the time to reach the edge of the NTN cell is located. Taking the three sub-areas shown in Figure 1 as an example, no matter the terminal device is in NTN1, NTN2 or NTN3, the time t required for the terminal device to reach the edge of the cell can meet the following conditions:
  • the time required for terminal devices in different sub-areas to reach the cell edge may be different.
  • the time to reach the cell edge can be used to trigger neighbor cell measurements in quasi-geo fixed cells and quasi-geo mobile cells.
  • the NTN cell when the NTN cell includes N sub-areas, the boundaries of the N sub-areas correspond to a time respectively, so the N sub-areas can correspond to N time areas.
  • the two boundaries of the sub-area including the edge of the NTN cell can correspond to a time range, and the terminal device can set the time measurement threshold according to the time range.
  • the range of the time measurement threshold can correspond to the sub-area including the edge of the NTN cell.
  • the terminal device performs the neighboring cell measurement at the start time of the time measurement threshold.
  • the sub-area including the edge of the NTN cell can also be called the most edge sub-area.
  • the network device may provide the terminal device with the vertical distance of the network device from the ground, the distance between the terminal device and the network device, and the direction angle of the antenna through broadcast information/system information/proprietary signaling.
  • the NTN cell is divided into three areas: NTN1, NTN2, and NTN3.
  • the time to reach the edge of these three areas is t1, t2, and t3 respectively.
  • the terminal device can set the time threshold for triggering measurement, and the setting of the time threshold is determined based on the NTNx annular range closest to the edge of the NTN cell division. If the threshold based on time measurement is t, the value of t corresponding to Figure 5 is [t2, t3].
  • the terminal device starts to perform normal adjacent cell evaluation and prepare for cell reselection. Therefore, in the time gap [t2, t3], the terminal device can start to perform normal adjacent cell measurements and prepare for the next cell reselection.
  • the terminal device can trigger neighbor cell measurement based on distance.
  • the terminal device can determine the distance between the terminal device and the network device based on the first parameter, and determine whether to trigger the neighbor cell measurement based on the distance.
  • the network device can provide the terminal device with a reference position for calculating the distance.
  • the terminal device can trigger the neighbor cell measurement based on the distance threshold provided by the network device, or it can trigger the neighbor cell measurement in combination with its own motion information.
  • the terminal device can also estimate when the service cell stops providing coverage at the current location based on the reference position and the distance threshold. For terminal devices with different distances to the cell edge, the time to stop service is different.
  • the terminal device can determine the distance from the terminal device to the cell edge based on the relative movement, thereby triggering the neighbor cell measurement.
  • the terminal device can determine the cell division method with the network according to the first parameter.
  • the distance between the terminal device and the network device is determined based on the antenna direction angle, and the distance between the cell edge and the network device is determined based on the antenna direction angle. Comparing the two distances can indicate the distance between the terminal device and the NTN cell edge, thereby determining whether to trigger the neighboring cell measurement.
  • the distance between the NTN cell edge and the network device is L max .
  • the neighboring cell measurement can be triggered. For example, a threshold can be set, and when the difference between L and L max is less than the threshold, the neighboring cell measurement is triggered.
  • the terminal device may determine the second parameter based on the first parameter described above.
  • the second parameter may be used to indicate the distance between the terminal device and the edge of the NTN cell.
  • the terminal device may determine whether to trigger neighboring cell measurement based on the distance from the edge of the NTN cell.
  • the terminal device may set a distance threshold, and when the distance between the terminal device and the edge of the cell is less than the threshold, the neighboring cell measurement is triggered.
  • the terminal device may determine the edge of the NTN cell based on the azimuth angle of the antenna.
  • the terminal device may determine the distance from the first position based on the service link distance and the height of the network device from the ground, thereby determining the distance from the edge of the cell.
  • the second parameter can also be determined based on other information.
  • This other information can be an offset determined by the network device based on a reference position, it can be the ephemeris data of the network device, it can be the moving speed of the network device, it can be the motion trajectory of the network device, and it can also be the mobile information of the terminal device.
  • the offset, ephemeris data, moving speed and motion trajectory related to the network device can be referred to as the first information.
  • the terminal device can receive the first information through the broadcast information, system information or proprietary signaling of the network device.
  • Various information in the first information can be converted into each other.
  • the motion trajectory of the network device can be determined by the ephemeris data
  • the offset can also be determined by the moving speed of the network device.
  • the second parameter can be determined based on the mobile information of the terminal device and the time of arrival at the edge of the NTN cell.
  • the time of arrival of the terminal device at the edge of the NTN cell can be determined by the first parameter or other means.
  • the terminal device can calculate the distance from the cell edge based on its own speed and the time of arrival at the cell edge. Through the distance and speed information, the terminal device can know when to initiate distance-based measurement.
  • the second parameter can determine the offset of the network device within a time period according to the movement trajectory and movement speed of the network device.
  • the real-time location information of the network device can be determined according to the offset.
  • the terminal device can determine the distance between the two according to its own location information and the real-time location information. According to the distance and the coverage area of the network device, it can be determined whether to trigger the neighboring cell measurement.
  • the network device is in constant motion and can notify the terminal device of the ephemeris data through broadcast information/system information/proprietary signaling.
  • the terminal device can obtain the position of the network device at different time points based on the ephemeris data. For example, the position of the sub-satellite point of the network device at the first time point can be called the reference position, and the position of the sub-satellite point at the second time point can be determined based on the reference position and the offset. Therefore, the terminal device can calculate the real-time reference position of the network device and the current real-time position of the terminal device. The terminal device can determine the time to reach the edge of the cell based on the position information, thereby determining when to initiate cell measurement and cell switching.
  • the reference position of the network device is the first projection position of the network device corresponding to the first time point, and the reference position of the network device corresponding to the second projection position at the second time point, and the offset is the distance between the second projection position and the first projection position.
  • the offset can be used to determine the distance between the terminal device and the network device at the second time point.
  • the first projection position and the second projection position can determine the movement trajectory of the network device.
  • the distance between the terminal device and the network device at the second time point may also be determined based on the location information of the terminal device.
  • the location information of the terminal device may be determined by observed time difference of arrival (OTDOA), global navigation satellite system (GNSS) auxiliary information, or other positioning information.
  • OTDOA observed time difference of arrival
  • GNSS global navigation satellite system
  • Figure 6 is a plan view of an NTN cell.
  • the network device moves along its motion trajectory.
  • the first projection position of the network device is the reference position shown in FIG6
  • the coverage area is area A.
  • the second projection position of the network device is the sub-satellite point shown in FIG6
  • the coverage area is area B.
  • the terminal devices belong to the coverage range of area A and area B respectively.
  • the vertical distance from the terminal device to the motion trajectory of the network device can be represented by K, and K is usually a constant.
  • ⁇ 1 and ⁇ 2 in FIG6 are the angles at which the reference position and the sub-satellite point are connected to the terminal device in the plane view, respectively.
  • d 1 is the distance from the reference position to the terminal device
  • d 2 is the distance from the sub-satellite point to the terminal device.
  • the network device moves from the reference position to the sub-satellite point.
  • the terminal device is in area A, and can determine the sub-area to which it belongs, and can also calculate the distance from the edge and the distance from the reference position. For example, the terminal device can determine d 1 and ⁇ 1 through communication with the network device. For another example, the terminal device can also determine ⁇ 1 through OTDOA positioning, GNSS auxiliary information or other positioning information.
  • the terminal device is not sure about the location of the network device, or the terminal device has not established a connection with the network device.
  • d1 represents the distance between the terminal device and the network device at the first time point
  • d2 represents the distance between the terminal device and the network device at the second time point
  • ⁇ 1 represents the angle between the line connecting the terminal device and the reference position and the motion trajectory
  • ⁇ 2 represents the angle between the line connecting the terminal device and the second projection position and the motion trajectory
  • L offset represents the offset of the network device based on the reference position at the second time point.
  • the terminal device When the terminal device obtains d 2 , it means that the terminal device can obtain the distance from the cell edge in area B.
  • the satellite's moving speed can also be used to know the service time in area B. Based on the edge distance and service time, the terminal device can determine when or how far away to initiate neighbor cell measurement.
  • the terminal device may trigger neighboring cell measurement based on an angle.
  • the terminal device may determine the relative angle with the network device based on the first parameter.
  • the relative angle may be the coverage angle of the network device corresponding to the terminal device.
  • the coverage angle of the network device may be the angle formed by the line connecting the network device and the coverage position and the vertical line between the network device and the ground.
  • the coverage angle is usually less than or equal to the azimuth angle of the antenna.
  • ⁇ max in FIG6 is the coverage angle corresponding to the edge of the network device, and the coverage angle is equal to the azimuth angle of the antenna.
  • the coverage angle corresponding to the terminal device changes with the relative movement of the network device and the terminal device.
  • the terminal device determines whether to trigger neighboring cell measurement based on the difference between the coverage angle and the antenna azimuth angle.
  • the terminal device may determine the second parameter according to the first parameter, and the second parameter is used to indicate the coverage angle of the network device corresponding to the terminal device.
  • the terminal device may determine whether to trigger neighboring cell measurement according to the coverage angle corresponding to the terminal device.
  • the network device can notify the terminal device of the ephemeris data through broadcast information/system information/proprietary signaling.
  • the neighboring cell measurement can be triggered according to the coverage angle corresponding to the terminal device.
  • N angle areas corresponding to the N sub-areas can be determined by the direction angle of the antenna. If the coverage angle corresponding to the terminal device is located in the angle area including the direction angle of the antenna, the terminal device triggers the neighboring cell measurement. In other words, if the coverage angle corresponding to the terminal device is located in the last sub-area including the edge, the neighboring cell measurement is triggered.
  • the coverage angles corresponding to the outer boundaries of the three sub-areas are ⁇ 1 , ⁇ 2 , and ⁇ 3 , respectively.
  • ⁇ 1 arccos(D/L 1 )
  • ⁇ 2 arccos(D/L 2 )
  • ⁇ 3 arccos(D/L 3 ).
  • ⁇ 3 ⁇ max
  • L 3 L max.
  • the angle area corresponding to sub-area NTN1 is [0, ⁇ 1 ]
  • the angle area corresponding to sub-area NTN2 is [ ⁇ 1 , ⁇ 2 ]
  • the angle area corresponding to sub-area NTN3 is [ ⁇ 2 , ⁇ 3 ].
  • the terminal device can initiate neighboring cell measurement.
  • [ ⁇ 2 , ⁇ 3 ] corresponds to sub-area NTN3, and sub-area NTN3 can also be called a relaxed measurement area.
  • the terminal device may trigger neighbor cell measurement based on the sub-area it is in.
  • the terminal device may determine whether to trigger neighbor cell measurement based on the sub-area it is in. For example, for a quasi-earth mobile cell, as the location of the serving cell changes, the sub-area where the terminal device is stationary also changes.
  • the terminal device can determine the sub-area in which it is located based on the first determination, and determine whether to trigger neighboring cell measurement based on the sub-area in which it is located. For example, the terminal device can determine which sub-area of the NTN cell it belongs to by the current service link distance and the height of the network device from the ground. As the network device moves, when the terminal device moves to the sub-area at the edge of the NTN cell, the neighboring cell measurement can be triggered, and the time to reach the edge of the cell can also be calculated to determine whether switching or measurement behavior occurs. Taking Figure 5 as an example, when the terminal device is located in sub-area NTN3, the neighboring cell measurement can be triggered.
  • the terminal device belongs to sub-area NTN2 of area A.
  • the terminal device belongs to sub-area NTN3 of area B.
  • the terminal device needs to recalculate the service time in area B and the distance from the cell edge.
  • the terminal device can determine the relevant parameters of the network device by periodically receiving the broadcast/upper layer signaling message of the network device.
  • the relevant parameters are, for example, the cell radius and the network device offset shown in FIG7 .
  • the terminal device can recalculate the time when it reaches the cell edge according to these parameters and determine whether to perform switching or measurement.
  • the terminal device may determine whether to trigger neighboring cell measurement based on the first parameter and the relaxed measurement area.
  • the relaxed measurement area may correspond to a variety of parameters to determine a variety of parameter ranges for triggering neighboring cell measurements.
  • the parameter corresponding to the terminal device is within the parameter range, the neighboring cell measurement is triggered.
  • the terminal device does not need to perform calculations and measurements related to or further related to the neighboring cell measurement.
  • the relaxed measurement area may correspond to the time parameter, distance parameter and angle parameter described above, respectively.
  • the terminal device may determine the parameter corresponding to the terminal device based on the first parameter, thereby determining whether it is necessary to trigger neighboring cell measurement.
  • the relaxed measurement area may correspond to the coverage angle of the network device.
  • the parameter range corresponding to the relaxed measurement area may be set to [ ⁇ 2 , ⁇ 3 ].
  • the coverage angle corresponding to the terminal device is determined according to the first parameter. If the coverage angle corresponding to the terminal device does not belong to [ ⁇ 2 , ⁇ 3 ], the terminal device does not need to perform tests related to neighboring cell measurements, which helps to reduce power consumption. If the coverage angle corresponding to the terminal device belongs to [ ⁇ 2 , ⁇ 3 ], neighboring cell measurement is triggered.
  • the relaxed measurement area may correspond to the distance between the terminal device and the network device.
  • the parameter range corresponding to the relaxed measurement area may be set to [L 2 , L 3 ].
  • the distance between the terminal device and the network device may be directly determined according to the first parameter.
  • the terminal device triggers neighboring cell measurement only when the distance between the terminal device and the network device belongs to the range [L 2 , L 3 ].
  • the terminal device can determine whether to perform relevant measurements for triggering neighboring cell measurements according to the sub-area in which it is located. That is to say, the terminal device can first determine which sub-area it is in, and only perform the above-mentioned relevant measurements of time, distance or angle for triggering neighboring cell measurements when it is in the most marginal sub-area. Still taking Figure 5 as an example, if the terminal device is located in NTN2, the terminal device does not need to trigger neighboring cell measurements, nor does it need to calculate or measure parameters for comparison with thresholds. Therefore, based on a more refined cell division, the terminal device can perform measurements better, improve the effect of the terminal device performing neighboring cell measurements, and reduce the power consumption of the terminal device by reducing unnecessary measurements.
  • the NTN cell division method introduced in FIG. 5 is applicable to quasi-terrestrial fixed cells and quasi-terrestrial mobile cells.
  • the coverage of the NTN cell can be divided into multiple sub-areas.
  • the coverage of the NTN cell of the quasi-terrestrial fixed cell can be divided into n equally divided sub-areas as shown in FIG5, or divided into several unequally divided sub-areas according to the degree and range of TN coverage.
  • the coverage of the NTN cell remains unchanged, but the relative distance between the network device and the terminal device is constantly changing. After a period of time, the signal of the current network device may not be able to cover the terminal device.
  • the service link distance L is less than the maximum distance L max of the service link and the coverage angle of the first network device corresponding to the terminal device is less than ⁇ max
  • the terminal device is within the coverage of the first network device.
  • the service link distance is greater than the maximum distance, or the coverage angle of the first network device corresponding to the terminal device is greater than ⁇ max
  • the terminal device has left the coverage of the first network device.
  • the terminal device can communicate with the second network device that takes over the service of the area from the first network device. That is, for a quasi-earth fixed cell, if the terminal device is not located, the terminal device will always be in the same sub-area. However, the network device that provides services to the terminal device is changing.
  • the coverage of the NTN cell changes as the network equipment moves.
  • the sub-area where the terminal device is located will change as the network equipment moves. If the terminal device is fixed, the sub-area where the terminal device is located will change.
  • the terminal device can determine the sub-area it is in and subsequent changes based on the message sent by the network device (for example, the first message described above). If the terminal device is in motion, the terminal device needs to periodically receive messages from the network device to determine the current and subsequent sub-areas, so as to determine whether to trigger neighbor cell measurement and its related measurements and calculations.
  • the network device can provide the terminal device with the antenna beam angle and cell radius of the cell center through broadcast information/system information/proprietary signaling.
  • the direction of the sub-satellite point and the distance of the service link can be determined by the beam angle of the cell center.
  • the network device can also provide the terminal device with NTN cell division. According to the geographical location and different antenna direction angles, the sub-areas of NTN division can be different.
  • the terminal device can calculate the coordinates of the reference position of the cell center according to the antenna direction angle and mobile speed of the network device. In addition, the terminal device also needs a cell radius or threshold to calculate the edge of the cell.
  • a time threshold T may be set. Every time T elapses, the network device may provide reference information to the terminal device. The network device may provide updated ephemeris parameters to the mobile cell each time, or provide ephemeris parameters with a timestamp. In addition, the network device may also provide multiple reference positions and their time information or moving speeds to the mobile cell. When the terminal device After the terminal device can determine the time when it reaches the cell edge, it will know when to initiate cell measurement and cell switching.
  • NTN cells can also be divided into cells in other ways.
  • Figures 8 and 9 show two possible division methods.
  • the NTN cell is equally divided into 8 sub-areas by four interlaced diameters.
  • the 8 sub-areas are sub-area a, sub-area b, sub-area c, sub-area d, sub-area e, sub-area f, sub-area g and sub-area h.
  • the NTN cell is divided into 9 sub-areas in a tic-tac-toe manner.
  • the 9 sub-areas are sub-area a, sub-area b, sub-area c, sub-area d, sub-area e, sub-area f, sub-area g, sub-area h and sub-area i.
  • the indication information contains the bit corresponding to the sub-area of the TN cell set to 1, otherwise it is set to 0.
  • the area division rules and numbering rules can be pre-configured to the terminal device. In this way, the network device only needs to provide a few bits to the terminal device to indicate the location of the TN cell.
  • the network device can notify the terminal device of the above indication message through broadcast or system information block (SIB) message, radio resource control (RRC) message.
  • SIB system information block
  • RRC radio resource control
  • FIG10 is a schematic block diagram of an apparatus for wireless communication provided by an embodiment of the present application.
  • the apparatus 1000 may be any terminal device described above.
  • the apparatus 1000 shown in FIG10 includes a measuring unit 1010 .
  • the measurement unit 1010 can be used to perform neighbor cell measurement in the NTN cell based on the first parameter, where the first parameter is associated with one or more of the following information: the distance between the terminal device and the network device corresponding to the NTN cell; the height of the network device corresponding to the NTN cell from the ground; the direction angle of the antenna of the network device corresponding to the NTN cell; and the sub-area in the NTN cell.
  • the sub-area in the NTN cell is determined based on a coverage angle of a network device corresponding to the NTN cell, and the coverage angle is less than or equal to a direction angle of an antenna.
  • the projection position of the network device perpendicular to the ground is the first position
  • the coverage angle corresponds to the boundary of the sub-area
  • the boundary of the sub-area includes a curve with the first position as the center.
  • the NTN cell includes N sub-areas, where N is a natural number greater than 1, and N coverage angles corresponding to the boundaries of the N sub-areas away from the first position respectively meet the following conditions: 0 ⁇ i ⁇ i+1 ⁇ N ;
  • ⁇ i is the coverage angle corresponding to the boundary of the i-th sub-area in the N sub-areas away from the first position
  • i is a natural number from 1 to N-1
  • ⁇ N is the direction angle of the antenna.
  • the NTN cell includes N sub-areas, where N is a natural number greater than 1, and the N sub-areas equally or unequally divide the coverage area of the NTN cell.
  • the sub-area in the NTN cell is also determined based on one or more of the following information: the coordinates of the network device corresponding to the NTN cell; the geographical environment of the NTN cell coverage area; the distribution of TN cells in the NTN cell coverage area; the restrictions on NTN cell signal interaction; the measurement requirements and/or switching requirements of the terminal device; and the auxiliary information provided by the terminal device.
  • the first parameter is determined according to a ratio of a distance and a height between the terminal device and a network device corresponding to the NTN cell.
  • the apparatus 1000 further includes a determining unit, which is configured to determine a second parameter according to the first parameter, where the second parameter is used to indicate the time when the terminal device reaches the edge of the NTN cell; and determine whether to trigger neighbor cell measurement according to the second parameter.
  • a determining unit which is configured to determine a second parameter according to the first parameter, where the second parameter is used to indicate the time when the terminal device reaches the edge of the NTN cell; and determine whether to trigger neighbor cell measurement according to the second parameter.
  • the second parameter is also determined according to one or more of the following information: the direction angle of the antenna of the network device; and a sub-area in the NTN cell.
  • ⁇ N is the directional angle of the antenna of the network device
  • ⁇ n is the coverage angle of the network device corresponding to the location of the terminal device
  • ⁇ is the relative angular velocity
  • ⁇ ⁇ 1 - ⁇ 2
  • ⁇ 1 is the angular velocity of the network device
  • ⁇ 2 is the angular velocity of the earth's rotation.
  • the NTN cell includes N sub-areas, where N is a natural number greater than 1, and the apparatus 1000 further includes a setting unit, which can be used to set a time measurement threshold, and the time measurement threshold corresponds to a sub-area including an edge of the NTN cell among the N sub-areas; a measuring unit 1010 may also be used to perform neighbor cell measurement at the start time of the time measurement threshold.
  • a setting unit which can be used to set a time measurement threshold, and the time measurement threshold corresponds to a sub-area including an edge of the NTN cell among the N sub-areas
  • a measuring unit 1010 may also be used to perform neighbor cell measurement at the start time of the time measurement threshold.
  • ⁇ N is the directional angle of the antenna of the network device
  • ⁇ i is the coverage angle of the network device corresponding to the boundary of the i-th sub-area away from the first position
  • ⁇ is the relative angular velocity
  • ⁇ ⁇ 1 - ⁇ 2
  • ⁇ 1 is the angular velocity of the network device
  • ⁇ 2 is the angular velocity of the earth's rotation.
  • the determination unit is further used to determine a second parameter based on the first parameter, where the second parameter is used to indicate a coverage angle of a network device corresponding to the terminal device; and determine whether to trigger neighboring cell measurement based on the second parameter.
  • the NTN cell includes N sub-areas, where N is a natural number greater than 1, and the azimuth angle of the antenna of the network device is used to determine N angle areas corresponding one to one to the N sub-areas of the NTN cell, and the measurement unit 1010 is also used to trigger neighboring cell measurement if the coverage angle of the network device corresponding to the terminal device is located in the angle area including the azimuth angle of the antenna.
  • the determination unit is further configured to determine a second parameter according to the first parameter, where the second parameter is used to indicate a distance between the terminal device and an edge of the NTN cell; and determine whether to trigger neighbor cell measurement according to the second parameter.
  • the second parameter is also determined based on one or more of the following information: an offset determined by the network device corresponding to the NTN cell based on a reference position; ephemeris data of the network device corresponding to the NTN cell; a moving speed of the network device corresponding to the NTN cell; a motion trajectory of the network device corresponding to the NTN cell; and mobile information of the terminal device.
  • the first parameter is used to determine the time when the terminal device arrives at the edge of the NTN cell
  • the second parameter is determined according to the mobility information of the terminal device and the time when the terminal device arrives at the edge of the NTN cell.
  • the NTN cell is a quasi-earth mobile cell
  • the second parameter is related to an offset determined by a network device corresponding to the NTN cell based on a reference position, the reference position being a first projection position of the network device corresponding to a first time point, and the offset being a distance between a second projection position of the network device corresponding to a second time point and the first projection position, and the offset is used to determine the distance between the terminal device and the network device at the second time point.
  • the distance between the terminal device and the network device at the second time point is also determined based on the location information of the terminal device.
  • d1 represents the distance between the terminal device and the network device at the first time point
  • d2 represents the distance between the terminal device and the network device at the second time point
  • ⁇ 1 represents the angle between the line connecting the terminal device and the reference position and the motion trajectory
  • ⁇ 2 represents the angle between the line connecting the terminal device and the second projection position and the motion trajectory.
  • L offset represents the offset of the network device based on the reference position at the second time point.
  • the first parameter is used to determine a sub-area where the terminal device is located, and the determination unit is further used to determine whether to trigger neighboring cell measurement according to the sub-area.
  • the determination unit is also used to determine whether to trigger neighbor cell measurement based on the first parameter and the relaxed measurement area; wherein the relaxed measurement area is used to determine the parameter range for triggering neighbor cell measurement, and the first parameter is used to determine the parameter value of the terminal device corresponding to the parameter range.
  • FIG11 is a schematic block diagram of an apparatus for wireless communication provided in another embodiment of the present application.
  • the apparatus 1100 may be any network device described above.
  • the apparatus 1100 shown in FIG11 includes a sending unit 1110.
  • the sending unit 1110 can be used to send a first parameter to the terminal device, where the first parameter is used by the terminal device to perform neighbor cell measurement in the NTN cell, and the first parameter is associated with one or more of the following information: the distance between the terminal device and the network device; the height of the network device from the ground; the directional angle of the antenna of the network device; and the sub-area in the NTN cell.
  • the sub-area in the NTN cell is determined based on a coverage angle of the network device, and the coverage angle is less than or equal to a direction angle of the antenna.
  • the projection position of the network device perpendicular to the ground is the first position
  • the coverage angle corresponds to the boundary of the sub-area
  • the boundary of the sub-area includes a curve with the first position as the center.
  • the NTN cell includes N sub-areas, where N is a natural number greater than 1, and N coverage angles corresponding to the boundaries of the N sub-areas away from the first position respectively meet the following conditions: 0 ⁇ i ⁇ i+1 ⁇ N ;
  • ⁇ i is the coverage angle corresponding to the boundary of the i-th sub-area in the N sub-areas away from the first position
  • i is a natural number from 1 to N-1
  • ⁇ N is the direction angle of the antenna.
  • the NTN cell includes N sub-areas, where N is a natural number greater than 1, and the N sub-areas equally or unequally divide the coverage area of the NTN cell.
  • the sub-area in the NTN cell is also determined based on one or more of the following information: the coordinates of the network device; the geographical environment of the NTN cell coverage area; the distribution of terrestrial network TN cells within the NTN cell coverage area; restrictions on NTN cell signal interaction; measurement requirements and/or switching requirements of the terminal device; and auxiliary information provided by the terminal device.
  • the first parameter is determined according to a ratio of a distance and a height between the terminal device and the network device.
  • the sending unit 1110 is also used to send first information to the terminal device, and the first information is used by the terminal device to determine whether to trigger neighboring cell measurement; wherein the first information includes one or more of the following information: an offset determined by the network device based on a reference position; ephemeris data of the network device; a moving speed of the network device; and a motion trajectory of the network device.
  • the first parameter and the first information are carried in one or more of the following information: broadcast information, system information, and proprietary signaling.
  • FIG12 is a schematic structural diagram of a communication device provided in an embodiment of the present application.
  • the dotted lines in FIG12 indicate that the unit or module is optional.
  • the device 1200 can be used to implement the method described in the above method embodiment.
  • the device 1200 can be a chip, a terminal device, or a network device.
  • the device 1200 may include one or more processors 1210.
  • the processor 1210 may support the device 1200 to implement the method described in the above method embodiment.
  • the processor 1210 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), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • DSP digital signal processor
  • ASIC application-specific integrated circuits
  • FPGA field programmable gate arrays
  • a general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.
  • the apparatus 1200 may further include one or more memories 1220.
  • the memory 1220 stores a program, which can be executed by the processor 1210, so that the processor 1210 executes the method described in the above method embodiment.
  • the memory 1220 may be independent of the processor 1210 or integrated in the processor 1210.
  • the apparatus 1200 may further include a transceiver 1230.
  • the processor 1210 may communicate with other devices or chips through the transceiver 1230.
  • the processor 1210 may transmit and receive data with other devices or chips through the transceiver 1230.
  • 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 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 integrated therein.
  • the available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a digital video disc (DVD)), or a semiconductor medium (e.g., a solid state disk (SSD)).
  • 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 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 site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center.
  • wired e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)
  • wireless e.g., infrared, wireless, microwave, etc.
  • 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.
  • system and “network” in this application can be used interchangeably.
  • the terms used in this application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.
  • the terms “first”, “second”, “third” and “fourth” in the specification and claims of this application and the accompanying drawings are used to distinguish different objects, rather than to describe a specific order.
  • the terms “including” and “having” and any of their variations are intended to cover non-exclusive inclusions.
  • 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.
  • 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.
  • 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.
  • determining B based on A does not mean determining B only based on A.
  • B can also be determined based on A and/or other information.
  • 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 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.

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Abstract

本申请提供了一种用于无线通信的方法及装置，有助于NTN小区中的终端设备执行邻小区测量。该方法包括：终端设备基于第一参数在NTN小区执行邻小区测量，所述第一参数与以下信息中的一种或多种关联：所述终端设备与所述NTN小区对应的网络设备之间的距离；所述NTN小区对应的网络设备距离地面的高度；所述NTN小区对应的网络设备的天线的方向角；以及所述NTN小区中的子区域。

Description

用于无线通信的方法及装置
本申请要求于2023年2月1日提交中国专利局、申请号为2023100977735、申请名称为“用于无线通信的方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，更为具体地，涉及一种用于无线通信的方法及装置。
背景技术
非地面网络(non terrestrial network，NTN)系统具有较强的移动性。对于NTN小区覆盖区域相对地面静止的系统(例如，准地球固定系统)，终端设备可以基于网络设备提供的服务小区的基准位置执行邻小区测量。
但是，在NTN小区随网络设备移动的系统(例如，准地球移动小区)中，服务小区覆盖区域的变化可能不利于终端设备执行邻小区测量。
发明内容
本申请提供一种用于无线通信的方法及装置。下面对本申请实施例涉及的各个方面进行介绍。
第一方面，提供了一种用于无线通信的方法，包括：终端设备基于第一参数在NTN小区执行邻小区测量，所述第一参数与以下信息中的一种或多种关联：所述终端设备与所述NTN小区对应的网络设备之间的距离；所述NTN小区对应的网络设备距离地面的高度；所述NTN小区对应的网络设备的天线的方向角；以及所述NTN小区中的子区域。
第二方面，提供了一种用于无线通信的方法，包括：网络设备向终端设备发送第一参数，所述第一参数用于所述终端设备在NTN小区执行邻小区测量，所述第一参数与以下信息中的一种或多种关联：所述终端设备与所述网络设备之间的距离；所述网络设备距离地面的高度；所述网络设备的天线的方向角；以及所述NTN小区中的子区域。
第三方面，提供了一种用于无线通信的装置，所述装置为终端设备，所述终端设备包括：测量单元，用于基于第一参数在NTN小区执行邻小区测量，所述第一参数与以下信息中的一种或多种关联：所述终端设备与所述网络设备之间的距离；所述网络设备距离地面的高度；所述网络设备的天线的方向角；以及所述NTN小区中的子区域。
第四方面，提供了一种用于无线通信的装置，所述装置为网络设备，所述网络设备包括：发送单元，用于向所述终端设备发送第一参数，所述第一参数用于所述终端设备在NTN小区执行邻小区测量，所述第一参数与以下信息中的一种或多种关联：所述终端设备与所述网络设备之间的距离；所述网络设备距离地面的高度；所述网络设备的天线的方向角；以及所述NTN小区中的子区域。
第五方面，提供一种通信装置，包括存储器和处理器，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，以执行如第一方面或第二方面所述的方法。
第六方面，提供一种装置，包括处理器，用于从存储器中调用程序，以执行如第一方面或第二方面所述的方法。
第七方面，提供一种芯片，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第一方面或第二方面所述的方法。
第八方面，提供一种计算机可读存储介质，其上存储有程序，所述程序使得计算机执行如第一方面或第二方面所述的方法。
第九方面，提供一种计算机程序产品，包括程序，所述程序使得计算机执行如第一方面或第二方面所述的方法。
第十方面，提供一种计算机程序，所述计算机程序使得计算机执行如第一方面或第二方面所述的方法。
本申请实施例中的终端设备可以基于第一参数及其关联信息在NTN小区执行邻小区测量。该第一 参数可以根据终端设备位于的子区域信息，或者，终端设备与网络设备之间更准确的相对位置信息指示终端设备触发邻小区测量的时机，从而提升终端设备进行邻小区测量的效果。
附图说明
图1是本申请实施例应用的无线通信系统。
图2是本申请实施例应用的一种NTN系统。
图3是本申请实施例应用的另一NTN系统。
图4是本申请实施例提供的一种用于无线通信的方法的示意图。
图5是本申请实施例提供的一种NTN小区划分方式的示意图。
图6是图4所示方法的一种可能的实现方式的结构示意图。
图7是移动小区终端设备确定所在子区域的一种可能的实现方式的示意图。
图8是本申请实施例提供的另一NTN小区划分方式的示意图。
图9是本申请实施例提供的又一NTN小区划分方式的示意图。
图10是本申请实施例提供的一种用于无线通信的装置的结构示意图。
图11是本申请实施例提供的另一用于无线通信的装置的结构示意图。
图12是本申请实施例提供的通信装置的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。针对本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请实施例可以应用于各种通信系统。例如：本申请实施例可应用于全球移动通讯(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、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。本申请实施例还可应用于其他通信系统，例如未来的通信系统。该未来的通信系统例如可以是第六代(6th-generation，6G)移动通信系统，或者卫星(satellite)通信系统等。
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，通信系统不仅可以支持传统的蜂窝通信，还可以支持其他类型的一种或多种通信。例如，通信系统可以支持以下通信中的一种或多种：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，以及车联网(vehicle to everything，V2X)通信等，本申请实施例也可以应用于支持上述通信方式的通信系统中。
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。该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。该授权频谱也可以认为是专用频谱。
本申请实施例可应用于地面通信网络(terrestrial networks，TN)系统，也可以应用于NTN系统。作为示例，该NTN系统可以包括基于4G的NTN系统，基于NR的NTN系统，基于物联网(internet of things，IoT)的NTN系统以及基于窄带物联网(narrow band internet of things，NB-IoT)的NTN系统。
通信系统可以包括一个或多个终端设备。本申请实施例提及的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。
在一些实施例中，终端设备可以是WLAN中的站点(STATION，ST)。在一些实施例中，终端设备可以是蜂窝电话、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系统)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。
在一些实施例中，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。例如，终端设备可以是具有无线连接功能的手持式设备、车载设备等。作为一些具体的示例，该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。
在一些实施例中，终端设备可以部署在陆地上。例如，终端设备可以部署在室内或室外。在一些实施例中，终端设备可以部署在水面上，如部署在轮船上。在一些实施例中，终端设备可以部署在空中，如部署在飞机、气球和卫星上。
除了终端设备之外，通信系统还可以包括一个或多个网络设备。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。该网络设备例如可以是基站。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D2D、V2X、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。
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。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1为本申请实施例提供的一种通信系统的架构示意图。如图1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1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2为上文提到的NTN系统的一种架构示意图。图2所示的NTN系统200以卫星210作为空中平台。如图2所示，卫星无线电接入网络包括卫星210、服务链路220、馈线链路230、终端设备240、网关(gateway)250以及包括基站和核心网的网络260。
卫星210是基于太空平台的航天器。服务链路220指卫星210和终端设备240之间的链路。馈线链路230指网关250和卫星210之间的链路。基于地球的网关250将卫星210连接到基站或核心网络，具体取决于架构的选择。
图2所示的NTN架构为弯管式应答器架构。在该架构中，基站位于网关250后面的地球上，卫星210充当中继。卫星210作为转发馈线链路230信号到服务链路220的中继器运行，或者，转发服务链路220信号到馈线链路230。也就是说，卫星210不具有基站的功能，终端设备240和网络260中基站之间的通信需要通过卫星210的中转。
示例性地，图3为NTN系统的另一种架构示意图。图3所示的NTN系统300同样以卫星310作为空中平台。与图2不同的是，卫星310上有基站312，网关350后面的网络360只包括核心网。
图3所示的NTN架构为再生式应答器架构。在该架构中，卫星310携带基站312，可以通过链路直接连接到基于地球的核心网络。卫星310具有基站的功能，终端设备340可以与卫星310直接通信。因此，卫星310可以称为网络设备。
在图2和图3所示架构的通信系统中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。
在本申请实施例中，图1-图3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。
应理解，本申请实施例中网络/系统中具有通信功能的设备可称为通信设备。以图1示出的通信系统100为例，通信设备可包括具有通信功能的网络设备110和终端设备120，网络设备110和终端设备120可以为上文所述的具体设备，此处不再赘述；通信设备还可包括通信系统100中的其他设备，例如网络控制器、移动管理实体等其他网络实体，本申请实施例中对此不做限定。
为了便于理解，先对本申请实施例涉及的一些相关技术知识进行介绍。以下相关技术作为可选方案与本申请实施例的技术方案可以进行任意结合，其均属于本申请实施例的保护范围。本申请实施例包括以下内容中的至少部分内容。
随着通信技术的发展，通信系统(例如，5G)将集成卫星和地面网络基础设施的市场潜力。例如，5G标准使包括卫星段在内的NTN成为公认的第三代合作伙伴计划(3rd generation partnership project，3GPP)5G连接基础设施的一部分。
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(静止)轨道(geostationary earth orbit，GEO)卫星、高椭圆轨道(high elliptical orbit，HEO)卫星等。其中，LEO是一种以地球为中心的轨道，其高度为2000公里或以下，或每天至少有11.25个周期，偏心率小于0.25。外层空间中的大多数人造物体位于LEO。LEO卫星以高速(移动性)绕地球运行，但在可预测或确定的轨道上。
轨道高度不同的卫星具有不同的轨道周期。
LEO：典型高度为250-1500公里，轨道周期为90-120分钟。
MEO：典型高度为5000-25000公里，轨道周期为3-15小时。
GEO：高度约为35786公里，轨道周期为24小时。
NTN是指使用卫星或无人机系统(unmanned aerial system，UAS)平台上的射频(radio frequency，RF)资源的网络或网络段。对终端设备进行访问的NTN的典型场景涉及NTN透明有效载荷或NTN再生有效载荷。前文图2和图3所示为以卫星为例的两种NTN系统的架构。其中，图2所示的弯管式应答器架构对应NTN透明有效载荷，图3所示的再生式应答器架构对应NTN再生有效载荷。
在基于卫星通信的NTN系统中，服务小区的覆盖范围一般比较大。NTN小区的直径大小至少为50km。在一些实施例中，NTN小区可以覆盖多个部署TN小区的城市，也可以额覆盖没有TN小区的偏远地区或海洋地区。
在NTN系统中，卫星或无人机系统都具有较强的移动性。卫星投射到地面的小区可以是相对地面固定的，也可以是随着卫星移动的。以LEO卫星对应的服务小区为例，LEO卫星投射到地面的小区通常包括两种模式：准地球固定小区(fixed cell)和准地球移动小区(moving cell)。
与地面相对静止的小区可以指的是覆盖的地理区域固定的服务小区。例如，不同LEO卫星通过调整天线指向角度完成地面同一区域的覆盖；当某个LEO卫星无法覆盖该区域时，通过另一个LEO卫星来接替。对于位于地球同步轨道(geosynchronous orbit，GSO)的卫星，投射到地面的小区也可以是固定小区。
移动小区可以指的是覆盖的地理区域变化的服务小区。例如，LEO卫星投射到地面的小区可以跟着卫星一起移动。一般地，当LEO卫星的天线与地面垂直时，LEO卫星投射到地面的小区为移动小区。LEO卫星不论是作为独立基站还是中继基站，移动小区都是跟着LEO卫星一起移动，而且LEO卫星与终端设备的相对距离一直在改变。在一段时间之后，LEO卫星的信号可能无法覆盖该终端设备，如果网络部署比较完善，则会有下一个LEO卫星来覆盖该终端设备。由于卫星系统是球状的，下一个LEO卫星可能来自各个角度。
卫星与地面垂直的投影位置可以称为子卫星点，也可以称为参考位置或参考点。地面上卫星参考位置的轨迹通常与卫星轨道对齐。也就是说，地面卫星参考点的轨迹可以认为是卫星运行轨道的投影。
卫星的运行参数可以通过星历表数据来表示。星历表数据通常有两种格式，一种是轨道参数，一种是位置、速度、时间(PVT)参数。卫星轨道参数或者PVT参数均可以指示卫星相对地面的位置坐标。终端设备可以通过星历表数据确定卫星未来的运行轨迹，从而确定是否需要进行测量或切换。
NTN系统可以包括准地球固定系统和移动单元系统。在小区测量和重选增强的主题中，不同系统的解决方案是不同的。例如，对于准地球固定系统基于时间的小区重选，网络设备可以向终端设备提供其公共小区停止服务的时间。小区内所有空闲/非活动的终端设备可以在该小区停止时间之前执行小区重选。例如，对于准地球固定系统基于位置的测量发起，网络设备可以向终端设备提供服务小区的参考位置和距离阈值。如果终端设备和当前服务小区的基准位置之间的距离大于该距离阈值，则终端设备应当执行相邻小区测量。
以Rel-17的规范为例，该规范为NTN准地面固定小区分别指定了基于位置的测量起始规则和基于时间的测量起始规则。对于基于位置的测量起始规则，引入了距离阈值和服务小区参考位置(即，地面上的小区中心)。如果终端设备与服务小区参考位置之间的距离小于距离阈值并且满足传统的信号接收条件，则终端设备可以不执行基于优先级进行的相邻小区测量。其中，该信号接收条件可以是参考信息接收功率(reference signal received power，RSRP)条件，可以是参考信号接收质量(reference signal received quality，RSRQ)条件。基于优先级的相邻小区测量指的是基于NR个具有相等或更低优先级的频率内或频率间，或具有更低优先级的无线接入技术(radio access technology，RAT)间频率进行相邻小区测量。对于基于时间的测量起始规则，该规则引入了服务小区的小区停止时间，即小区停止覆盖当前区域的时间。如果配置了小区停止时间，则终端设备应在小区停止时间之前开始相邻小区的测量，而不管是否满足上述的位置条件或传统的RSRP/RSRQ条件。
但是，上述适用于准地球固定系统的解决方案并不适用于移动单元系统。
对于移动单元系统来说，NTN小区的覆盖区域会跟着网络设备一起移动。即使终端设备是固定的，该终端设备与网络设备的相对位置也会发生变化。也就是说，对于移动单元系统来说，终端设备和服务小区的位置可能都在发生变化。以低轨道(LEO)卫星的移动小区为例，典型的LEO卫星速度为7.56km/s。随着LEO卫星的移动，卫星的足迹在地球上滑动。考虑到NTN小区直径大小至少为50km，意味着在6.61秒内，该小区中的所有空闲/非活动终端设备都需要被分发。也就是说，该小区内的所有终端设备需要重新选择另一个驻扎小区，也会有新的终端设备驻扎在该小区上。如果按照上述的解决方案，网络设备向终端设备提供的用于触发小区测量/重选的信息可能不准确，因此不利于终端设备进行邻小区测量或者小区重选。
如前文所述，NTN小区通常提供比TN小区大得多的覆盖范围。NTN小区会覆盖大量低移动性的NB-IoT终端设备。对于地球移动小区来说，尽管NB-IoT终端设备移动缓慢，但由于网络设备的移动， 网络设备和终端设备之间的距离会发生明显改变。因此，对于移动小区内的终端设备来说，终端设备需要更准确的信息，以在网络设备停止对其进行服务的位置之前执行邻小区测量。
为解决上述的部分问题，本申请实施例提出一种用于无线通信的方法。该方法通过与终端设备位置信息相关的第一参数来指示终端设备执行邻小区测量。该终端设备的位置信息可以指示终端设备与服务小区的相对位置关系，有助于终端设备更好地进行测量/切换等。为便于理解，下面结合图4对本申请实施例的主要技术方案进行详细地介绍。
图4是站在终端设备和网络设备交互的角度进行撰写的。终端设备通过与网络设备之间的通信，确定触发邻小区测量的时机。
终端设备可以是NTN小区内与网络设备通信的任意一种前文提到的终端设备，也可以是在其他地面移动小区内通信的终端设备。在一些实施例中，终端设备可以是NB-IoT中移动性较低的通信设备。
在一些实施例中，终端设备可以是NTN小区中处于空闲态或者非活动态的通信设备。终端设备可以接收网络设备发送的广播信息或者系统信息。在一些实施例中，终端设备可以是活动态的通信设备。终端设备可以接收网络设备发送的广播信息或者系统信息，也可以接收网络设备发送的专有信令。其中，专有信令可以降低对公共资源的消耗。
网络设备可以是终端设备所在NTN小区提供网络服务的通信设备。例如，网络设备可以是作为独立基站的卫星，还可以是作为中继基站的无人机系统。
NTN小区可以是覆盖区域相对地面静止的服务小区，例如准地球固定小区。NTN小区还可以是覆盖区域随网络设备移动的服务小区，例如准地球移动小区。在此不做限定。
参加图4，在步骤S410，终端设备接收网络设备发送的第一参数。
第一参数用于指示终端设备执行邻小区测量。第一参数可以指示终端设备与当前服务小区的相对位置关系，使终端设备确定是否处于服务小区的边缘区域，从而可以更好地触发邻小区测量。第一参数可以一种或多种信息关联。这些信息可以是终端设备与网络设备之间的距离，该距离也可以称为服务链路距离，用L表示。服务链路距离的阈值与NTN小区的覆盖范围有关。这些信息还可以是网络设备距离地面的高度，也可以称为网络设备垂直地面的高度。这些信息还可以是网络设备的天线的方向角，用于确定NTN小区的覆盖区域。这些信息还可以是NTN小区中的子区域。子区域可以包括NTN进行精细划分后的多个虚拟区域。
网络设备的天线的方向角可以是天线设置的方向角，也可以是网络设备对应的方向角。在一些实施例中，网络设备的天线的方向角可以是天线可以设置的最大方向角，也可以是当前提供网络服务时的方向角。因此，天线的方向角也可以称为最大方向角或者波束天线角度。例如，NTN小区为准地球固定小区时，卫星天线的方向角可以在最大方向角的范围内进行调整，以适应NTN小区的覆盖范围。在一些实施例中，天线的方向角也可以指的是网络设备或者卫星的方向角。例如，NTN系统中的卫星作为中继基站时，该天线的方向角为卫星的方向角。根据卫星的方向角，可以确定终端设备与卫星的相对位置信息，也可以确定对应NTN小区的覆盖区域。
合理的子区域划分方式可以有利于终端设备执行测量/切换。其中，终端设备的切换可以包括NTN-NTN，NTN-TN等之间的切换。例如，终端设备可以通过所在的子区域确定是否位于NTN小区覆盖区域的核心位置时，从而减少不必要的测量。
为了与地面TN蜂窝网络的覆盖划分方式统一，NTN小区中的子区域基于网络设备的覆盖角度确定。通过网络设备的天线的方向角可以确定网络设备当前的覆盖区域。在该覆盖区域内，网络设备与覆盖位置的连线和网络设备与地面的垂线形成的夹角为网络设备的覆盖角度。也就是说，终端设备对应的覆盖角度可以根据终端设备与网络设备之间的距离和网络设备相对地面的高度的比值确定。覆盖角度也可以称为偏移角。不同位置的终端设备会对应不同的覆盖角度。在NTN小区的边缘位置，覆盖角度也就是天线的方向角。因此，网络设备的覆盖角度小于或者等于天线的方向角。
在一些实施例中，基于覆盖角度对NTN小区进行划分指的是根据天线的方向角确定对应多个子区域的多个覆盖角度。多个覆盖角度可以为等差数列，也可以不是等差数列。例如，天线的方向角为60度时，多个子区域对应的覆盖角度可以分别是15度、30度、45度和60度。也就是说，基于该方向角将NTN小区划分为四个子区域，通过四个子区域对应的覆盖角度确定每个子区域的一个边界。又如，在小区边缘，卫星的覆盖角度为αmax，可以将这个角度划分为α1，α2，α3…αi，其中α1＜α2＜α3…..＜αi＜αmax。
作为可能的实现方式，NTN划分的多个子区域可以是网络设备垂直地面的投影位置为圆心的多个圆形或圆环形区域。以当NTN小区包括N个子区域(N为大于1的自然数)时，N个子区域远离圆心的边界分别对应的N个覆盖角度满足以下条件：
0＜αi＜αi+1≤αN；
其中，αi为N个子区域中第i个子区域远离圆心的边界对应的覆盖角度，i为1到N-1的自然数，αN为天线的方向角。
作为可能的实现方式，NTN小区划分的多个子区域可以等分或者不等分NTN小区的覆盖区域。例如，NTN小区包括N个子区域时，N个子区域对应的面积可以等分NTN小区。也就是说，N个子区域的面积可以相等。又如，N个子区域对应的面积可以是部分相等，或者全部不相等的。
在一些实施例中，NTN小区中的子区域还可以根据网络设备与地面垂直的投影位置确定。该投影位置可以称为第一位置。NTN根据覆盖角度可以确定子区域的边界，子区域的边界包括以第一位置为圆心的曲线。第一位置可以根据网络设备的坐标确定。例如，终端设备可以根据网络设备对应的星历表数据确定网络设备的轨道参数或PVT参数，这些参数可以确定网络设备投影到地面的坐标。根据第一位置和覆盖角度，可以确定NTN小区多个子区域的位置信息。
在一些实施例中，NTN小区在基于覆盖角度进行划分时，还可以考虑其他的多个信息。也就是说，NTN小区中的多个虚拟子区域还可以根据一种或多种其他相关信息确定。其他相关信息可以是网络设备的坐标，可以是NTN小区覆盖区域的地理环境，可以是NTN小区覆盖区域内络TN小区的分布情况，可以是NTN小区信号交互的限制，可以是终端设备的测量要求和/或切换要求，还可以是终端设备提供的辅助信息。例如，将NTN小区划分为N个子区域时，根据上述其他相关信息调大N的值可以增加子区域的数量，对NTN小区进行更为精细地划分。
作为可能的实现方式，NTN小区中的子区域可以根据网络设备的坐标和TN的覆盖情况进行自适应地调整。例如，当坐标显示网络设备位于人口密集的区域，或者NTN小区内的TN小区较多时，可以增加子区域的数量。通过增加子区域的数量，可以使NTN小区更准确地与TN小区进行切换。
作为可能的实现方式，NTN小区中的子区域可以根据覆盖区域的地理环境进行自适应地调整。例如，NTN小区覆盖的主要区域为海洋或者沙漠时，可以减少子区域的数量。因为该区域TN小区较少，与TN小区发生切换的概率小。
作为可能的实现方式，NTN小区中的子区域可以根据NTN小区信号交互的限制确定。例如，NTN小区中的TN小区较多时，如果子区域较多，终端设备需要与网络设备进行较多的信号交互来满足不同子区域进行测量或切换的需求。当网络设备为卫星时，传输延迟较大，为了减少交互可以减少子区域的数量。
作为可能的实现方式，NTN小区中的子区域可以根据终端设备的测量要求和/或切换要求确定。例如，为了减少功耗，终端设备测量或切换的准确度要求高时，可以增加子区域的数量来减少后续测量和切换的判断偏差。
作为可能的实现方式，NTN小区中的子区域还可以根据终端设备提供的其他辅助信息确定。例如，终端设备可以向网络设备提供其周围的环境信息，或者通过其他方式确定的位置信息等。网络设备可以根据多个终端设备提供的辅助信息确定子区域的数量。
综上，为了确定NTN小区的划分方式以及划分为几个子区域，除网络设备的覆盖角度和位置外，还可以考虑NTN小区覆盖的地面情况、覆盖区域TN的分布情况，通信要求以及终端设备提供的辅助信息来进行确定，以便NTN小区划分的更为精确，更能适应覆盖的地理区域。
下面将结合图5对本申请实施例提出的NTN小区划分方式进行具体介绍。
参见图5，网络设备垂直地面的投影位置为第一位置510，天线的方向角为网络设备的最大方向角αmax。基于该方向角将NTN小区划分为三个子区域，分别是NTN1、NTN2和NTN3。如图5所示，三个子区域的边界以第一位置510为圆心。具体而言，子区域NTN1的边界曲线520。为以第一位置510为圆心的圆。子区域NTN2的边界分别为曲线520和曲线530，其中曲线530也是以第一位置510为圆心的圆。同样地，子区域NTN2的边界分别为曲线530和曲线540，其中曲线540也是以第一位置510为圆心的圆。N
如图5所示，多个子区域的边界对应的网络设备的覆盖角度小于或者等于天线的方向角。子区域NTN1的边界曲线520对应的覆盖角度为α1，α1小于αmax。子区域NTN2的两个边界对应的覆盖角度 分别为α1和α2，均小于αmax。子区域NTN3的内边界曲线530对应的覆盖角度为α2，外边界曲线540对应的覆盖角度等于αmax。
子区域内的终端设备对应的覆盖角度将在该子区域边界对应的覆盖角度的范围内。例如，子区域NTN1中的终端设备对应的覆盖角度小于或者等于α1。
应理解，图5所示的同心圆划分方式仅为示例，其他基于覆盖角度进行划分的方式也适用于本申请。例如，可以根据网络设备在多个方向的覆盖角度确定多个椭圆状的子区域。
结合图5介绍的NTN小区划分方式可以适用于准地球固定小区和准地球移动小区。对于不同的小区类型，终端设备与网络设备的相对位置变化不同。后文将进行具体说明。
图5所示的NTN小区划分方式可以更好地与地面TN蜂窝网络覆盖划分统一。在这种划分方式下，NTN网络可以更好地与地面蜂窝系统耦合，减少测量的盲区。除基于方向角的划分外，天线NTN小区的划分方式还可以包含其他多种，后面将结合图8和图9进行简要说明。
回到图4所示的步骤S410，第一参数可以通过终端设备在NTN小区中的位置信息来指示终端设备执行邻小区测量。该位置信息可以用于确定终端设备与对应的网路设备之间的相对位置信息。在一些实施例中，该相对位置信息可以用于确定终端设备是否处于当前服务小区的边缘区域。例如，终端设备可以通过第一参数关联的终端设备与网络设备之间的距离确定到达边缘的时间。在一些实施例中，该相对位置信息可以用于确定终端设备所在的子区域。NTN小区中的子区域可以设置不同的测量/切换模式，终端设备可以基于所在的子区域信息执行合理地测量。
终端设备与网络设备之间的相对位置信息可以包括终端设备与网络设备之间的相对距离或者相对角度。在一些实施例中，第一参数可以通过关联多种信息来直接指示该相对位置信息。例如，第一参数可以是终端设备与网络设备的距离。在一些实施例中，终端设备可以通过多种关联信息确定该相对位置信息。例如，第一参数可以通过终端设备和网络设备之间的距离以及网络设备距离地面的高度来确定终端设备对应的网络设备的覆盖角度。
在一些实施例中，第一参数可以直接为上述的一种或多种关联信息。例如，终端设备接收到的第一参数为网络设备距离地面的高度，或者为网络设备的天线的方向角，或者为子区域的划分方式。在一些实施例中，第一参数可以为获得上述一种或多种关联信息的其他信息。例如，第一参数可以是服务卫星对应的星历表数据。如果星历表数据中的卫星轨道参数可用，终端设备可以随时知道和预测服务卫星的位置，以及子卫星点的位置坐标。终端设备可以通过这些数据确定与服务卫星的相对位置信息。又如，第一参数可以是NTN小区中子区域的相关信息。终端设备可以通过这些相关信息确定所在的子区域，从而确定终端设备与网络设备之间的相对位置关系。又如，第一参数可以是网络设备发送的参考信号。终端设备可以根据接收的RSRP确定终端设备与网络设备之间的距离。
在步骤S420，终端设备基于第一参数在NTN小区执行邻小区测量。
邻小区测量也可以称为相邻小区测量。邻小区测量可以包括对相邻小区的测量，也可以包括用于触发邻小区测量的相关测量。终端设备执行邻小区测量时，相邻小区可以是NTN小区，也可以是TN小区，在此不做限定。
在一些实施例中，终端设备执行邻小区测量可以是为小区重选做准备。也就是说，终端设备触发邻小区测量后，邻小区的测量结果可以用于终端设备进行小区重选。
如前文所述，第一参数可以指示终端设备与服务小区的相对位置关系。第一参数的关联信息可以用于确定该相对位置关系，以指示终端设备是否触发邻小区测量。
终端设备可以基于多种触发因素执行邻小区测量。触发因素可以是时间，可以是距离，可以是角度，还可以是终端设备所在的子区域。
在一些实施例中，终端设备可以基于时间触发邻小区测量。作为可能的实现方式，终端设备可以根据第一参数确定到达NTN小区边缘的时间，根据该时间可以确定是否触发邻小区测量。例如对于准地球固定小区，服务小区可以提供停止服务时间。终端设备可以结合该停止服务时间和自身的运动信息设置一个时间测量阈值，当到达NTN小区边缘的时间小于该时间测量阈值，终端设备触发邻小区测量。例如对于准地球移动小区，终端设备和服务小区发生相对移动的情况下，终端设备同样可以根据时间测量阈值确定是否触发邻小区测量。
作为可能的实现方式，第一参数可以根据终端设备与网络设备之间的距离和网络设备距离地面的高度的比值确定。例如，网络设备距离地面的高度为D，终端设备与网络设备之间的距离为L时，该 比值(D/L)可以确定终端设备对应的网络设备的覆盖角度α。具体地，α＝arccos(D/L)。
作为一种可能的实现方式，网络设备可以通过广播信息/系统信息/专有信令向终端设备通知第一参数。终端设备可以根据第一参数确定第二参数，第二参数用于指示终端设备到达NTN小区边缘的时间。例如，第一参数包括网络设备的星历表数据时，终端设备可以根据星历表数据确定与网络设备之间的距离、网络设备距离地面的高度，从而确定对应的覆盖角度。为了得到终端设备到达NTN小区边缘的时间，第二参数还可以根据天线的方向角确定。通过天线的方向角和终端设备对应的覆盖角度可以确定终端设备到达小区边缘所需的时间，从而确定是否执行邻小区测量。
例如，终端设备到达NTN小区边缘的时间t可以通过如下公式确定：
t＝(αN-αn)/Δγ；
其中，αN为网络设备的天线的方向角(图5所示的αmax)，αn为终端设备所在位置对应的网络设备的覆盖角度，Δγ为相对角速度，Δγ＝γ1-γ2，γ1为网络设备的角速度，γ2为地球自转的角速度。
作为另一可能的实现方式，终端设备还可以设置时间测量阈值。当终端设备到达NTN小区边缘的时间小于该时间测量阈值时，可以触发邻小区测量。不同终端设备的时间测量阈值可以相同，也可以不同。
作为另一可能的实现方式，网络设备可以通知终端设备NTN小区的划分方式。NTN小区的覆盖范围较大，如果NTN区域内的所有终端设备分别设定到达NTN小区边缘时间的计算和通信，计算量偏大。终端设备还可以根据到达NTN小区边缘的时间所在的时间区域，确定是否触发邻小区测量。以图1所示的三个子区域为例，无论终端设备在NTN1、NTN2还是NTN3，终端设备到达小区边缘的所需的时间t可以满足下列条件：
t＝(αN-αi)/Δγ；
其中，αN为网络设备的天线的方向角(图5所示的αmax)，αi为N个子区域中第i个子区域远离第一位置的边界对应的覆盖角度，i为1到N-1的自然数，Δγ为相对角速度，Δγ＝γ1-γ2，γ1为网络设备的角速度，γ2为地球自转的角速度。
由上示可知，不同子区域内的终端设备到达小区边缘所需的时间可能是不一样的。到达小区边缘的时间可以用于准地球固定小区和准地球移动小区中邻小区测量的触发。
具体而言，NTN小区包括N个子区域时，N个子区域的边界分别对应一个时间，因此N个子区域可以对应N个时间区域。包括NTN小区边缘的子区域的两个边界可以对应一个时间范围，终端设备可以根据该时间范围设置时间测量阈值。也就是说，该时间测量阈值的范围可以与包括NTN小区边缘的子区域对应。终端设备在时间测量阈值的起始时间执行所述邻小区测量。其中，包括NTN小区边缘的子区域也可以称为最边缘的子区域。
例如，网络设备可以通过广播信息/系统信息/专有信令向终端设备提供网络设备垂直地面的距离、终端设备和网络设备之间的距离以及天线的方向角。终端设备可以根据服务链路距离和卫星垂直地面的高度计算出终端设备所在子区域的覆盖角度范围。按公式t＝(αN-αi)/Δγ可以知道终端设备所在子区域距离小区边缘的时间，以便终端设备发起测量和/或切换。
以图5所示的子区域划分方式为例，该NTN小区划分为3个区域：NTN1，NTN2，NTN3。该三个区域分别对应的到达这三个区域边缘的时间为t1，t2和t3。终端设备可以设置触发测量的时间阈值，时间阈值的设定基于NTN小区划分的最接近边缘的NTNx环形范围确定。如果基于时间测量的阈值为t，则图5对应的t的取值为[t2,t3]。在t2时，终端设备开始执行正常相邻小区评估并准备好小区重选的时间。因此，在时间间隙[t2,t3]，终端设备可以开始执行正常的相邻小区的测量，为下一个小区重选做好准备。
在一些实施例中，终端设备可以基于距离触发邻小区测量。终端设备可以根据第一参数确定与网络设备之间的距离，根据该距离确定是否触发邻小区测量。例如对于准地球固定小区，网络设备可以向终端设备提供计算距离的参考位置。终端设备可以根据网络设备提供的距离阈值触发邻小区测量，也可以结合自身的运动信息触发邻小区测量。终端设备还可以根据参考位置和距离阈值估计服务小区何时停止在当前位置提供的覆盖。对于到小区边缘距离不同的终端设备来说，停止服务的时间是不同的。例如对于准地球移动小区，终端设备可以根据相对移动的情况，判断终端设备到小区边缘的距离，从而触发邻小区测量。
作为一种可能的实现方式，基于图5所示的小区划分方式，终端设备可以根据第一参数确定与网 络设备之间的距离，并根据天线的方向角确定小区边缘与网络设备之间的距离。比较两个距离可以指示终端设备与NTN小区边缘之间的距离，从而确定是否触发邻小区测量。如图5所示，NTN小区边缘与网络设备之间的距离为Lmax，终端设备与网络设备之间的距离L接近Lmax时，就可以触发邻小区测量。例如，可以设置一个阈值，当L与Lmax的小于该阈值时，触发邻小区测量。
作为一种可能的实现方式，终端设备可以根据前文所述的第一参数确定第二参数。第二参数可以用于指示终端设备与NTN小区边缘之间的距离。终端设备可以根据与NTN小区边缘之间的距离确定是否触发邻小区测量。具体而言，终端设备可以设置一个距离阈值，当终端设备与小区边缘的距离小于该阈值后，触发邻小区测量。例如，终端设备可以根据天线的方向角确定NTN小区的边缘。终端设备可以根据服务链路距离和网络设备距离地面的高度确定与第一位置之间的距离，从而可以确定与小区边缘的距离。
作为一种可能的实现方式，第二参数还可以根据其他信息确定。这些其他信息可以是网络设备基于参考位置确定的偏移量(offset)，可以是网络设备的星历表数据，可以是网络设备的移动速度，可以是网络设备的运动轨迹，还可以是终端设备的移动信息。其中，网络设备相关的偏移量、星历表数据、移动速度及运动轨迹可以称为第一信息。终端设备可以通过网络设备的广播信息、系统信息或者专有信令接收第一信息。第一信息中的各种信息可以相互转化。例如，网络设备的运动轨迹可以通过星历表数据确定，偏移量也可以通过网络设备的移动速度确定。
例如，第二参数可以根据终端设备的移动信息和到达NTN小区边缘的时间确定。其中，终端设备到达NTN小区边缘的时间可以通过第一参数或其他方式确定。具体而言，终端设备可以根据自己的速度以及到达小区边缘的时间，来计算距离小区边缘的距离。通过该距离和速度信息，终端设备可以知道何时发起基于距离的测量。
例如，第二参数可以根据网络设备的运动轨迹和移动速度确定网络设备在一个时间段内的偏移量。根据该偏移量可以确定网络设备的实时位置信息。终端设备可以根据自身的位置信息和该实时位置信息确定两者之间的距离。通过该距离和网络设备的覆盖区域，可以确定是否触发邻小区测量。
作为一种可能的实现方式，网络设备在不断运动中，可以通过广播信息/系统信息/专有信令通知终端设备星历表数据。终端设备可以根据星历表数据获得网络设备运动在不同时间点上的位置。例如，网络设备在第一时间点子卫星点的位置可以称为参考位置，在第二时间点的子卫星点位置可以根据参考位置和偏移量确定。因此，终端设备可以计算出网络设备的实时参考位置以及终端设备当前的实时位置。终端设备可以根据位置信息确定到达小区边缘的时间，从而确定何时发起小区测量和小区切换。
作为一个示例，网络设备的参考位置为网络设备对应第一时间点的第一投影位置，在第二时间点会对应第二投影位置，偏移量为第二投影位置与第一投影位置之间的距离。该偏移量可以用于确定终端设备在第二时间点与网络设备之间的距离。其中，第一投影位置和第二投影位置可以确定网络设备的运动轨迹。
作为另一示例，终端设备在第二时间点与网络设备之间的距离还可以根据终端设备的位置信息确定。其中，终端设备的位置信息可以通过到达时间差定位法(observed time difference of arrival，OTDOA)、全球导航卫星系统(global navigation satellite system，GNSS)辅助信息或者其它定位信息确定。
为便于理解，下面以准地球移动小区为例，结合图6对该基于距离的测量触发方案的一种可能的实现方式进行具体地介绍。图6为NTN小区的平面图。
参见图6，网络设备沿着其运动轨迹进行移动。在第一时间点，网络设备的第一投影位置为图6所示的参考位置，覆盖区域为A区域。在第二时间点，网络设备的第二投影位置为图6所示的子卫星点，覆盖区域为B区域。如图6所示，终端设备分别属于A区域和B区域的覆盖范围。其中，终端设备到网络设备的运动轨迹的垂直距离可以用K表示，通常K为常数。以网络设备的运动轨迹为参考，图6中的θ1，θ2分别为参考位置和子卫星点相连于终端设备在平面图中的角度。d1为参考位置到终端设备的距离，d2为子卫星点到终端设备的距离。
从第一时间点到第二时间点，网络设备从参考位置运动到子卫星点。在第一时间点，终端设备在A区域里，可以确定所属于的子区域，也能计算出离边缘的距离和离参考位置的距离。例如，终端设备可以通过与网络设备的通信确定d1和θ1。又如，终端设备还可以通过OTDOA定位、GNSS辅助信息或者其它定位信息确定θ1。第二时间点终端设备如果不确定网络设备的位置，或者终端设备还没有与网络设备建立连接。
由前文可知，K为常数，K可以表示为：K＝d1sinθ1＝d2sinθ2。因此，终端设备在第二时间点与网络设备之间的距离d2满足以下条件：
d2＝d1sinθ1/sinθ2；
其中，d1表示终端设备在第一时间点与网络设备之间的距离；d2表示终端设备在第二时间点与网络设备之间的距离；θ1表示终端设备与参考位置的连线与运动轨迹的夹角；θ2表示终端设备与第二投影位置的连线与运动轨迹的夹角，θ2满足以下条件：
θ2＝180-arctg[d1sinθ1/(Loffset-d1cosθ1)]；
其中，Loffset表示网络设备在第二时间点基于参考位置的偏移量。
当终端设备获得d2，也就表明终端设备能够获得在区域B时离小区边缘的距离。通过卫星的移动速度，也能知道在区域B的服务时间。根据边缘的距离和服务时间，终端设备可以确定什么时候或者距离多远时发起邻小区测量。
在一些实施例中，终端设备可以基于角度触发邻小区测量。作为可能的实现方式，终端设备可以根据第一参数确定与网络设备之间的相对角度。该相对角度可以是终端设备对应的网络设备的覆盖角度。网络设备的覆盖角度可以是网络设备与覆盖位置的连线和网络设备与地面的垂线形成的夹角。覆盖角度通常小于或等于天线的方向角。图6中的αmax为网络设备边缘对应的覆盖角度，该覆盖角度等于天线的方向角。例如对于准地球移动小区，终端设备对应的覆盖角度随着网络设备和终端设备的相对移动而变化。终端设备可以根据覆盖角度和天线方向角的差值确定是否触发邻小区测量。
作为可能的实现方式，终端设备可以根据第一参数确定第二参数，第二参数用于指示终端设备对应的网络设备的覆盖角度。终端设备可以根据终端设备对应的覆盖角度确定是否触发邻小区测量。
作为另一可能的实现方式，当网络设备与终端设备在某一时刻运动到某一相对位置时，网络设备可以通过广播信息/系统信息/专有信令向终端设备通知星历表数据。终端设备通过当前服务链路的距离和网络设备距离地面的高度，获得当前终端设备相对网络设备的偏移角，也就是对应的覆盖角度。例如，终端设备m服务链路的距离为Lm，高度为D时，终端设备对应的覆盖角度αm＝arccos(D/Lm)。网络设备的最大覆盖角度αmax＝arccos(D/Lmax)。以卫星为例，在卫星运动轨道中，可以近似认为每一个子卫星点距离卫星的高度是一样的。如果αm＜αmax，可以认为终端设备在卫星的覆盖区域内。如果αm＞αmax，可以认为终端设备已经脱离卫星的覆盖区域。因此，可以根据终端设备对应的覆盖角度触发邻小区测量。
作为另一可能的实现方式，NTN小区包括基于覆盖角度确定的N个子区域时，通过天线的方向角可以确定与N个子区域一一对应的N个角度区域。如果终端设备对应的覆盖角度位于包括天线的方向角的角度区域，则终端设备触发邻小区测量。也就是说，如果终端设备对应的覆盖角度位于包括边缘的最后一个子区域内，触发邻小区测量。
以图5划分的三个子区域为例，三个子区域的外边界对应的覆盖角度分别为α1，α2，α3。α1＝arccos(D/L1)，α2＝arccos(D/L2)，α3＝arccos(D/L3)。其中，α3＝αmax，L3＝Lmax。子区域NTN1对应的角度区域为[0,α1]，子区域NTN2对应的角度区域为[α1,α2]，子区域NTN3对应的角度区域为[α2,α3]。如果终端设备对应的覆盖角度在[α2,α3]范围内，终端设备可以发起邻小区测量。[α2,α3]与子区域NTN3对应，子区域NTN3也可以称为松弛测量区域。
在一些实施例中，终端设备可以根据所在的子区域触发邻小区测量。作为可能的实现方式，当NTN小区的子区域划分方式可以指示终端设备与NTN边缘的距离时，终端设备可以根据所在的子区域确定是否触发邻小区测量。例如对于准地球移动小区，随着服务小区位置的变化，终端设备静止时所处的子区域也在发生变化。
作为可能的实现方式，终端设备可以根据第一确定所在的子区域，并根据所在子区域确定是否触发邻小区测量。例如，终端设备可以通过当前服务链路距离和网络设备距离地面的高度确定属于NTN小区的哪个子区域内。随着网络设备的移动，当终端设备移动到NTN小区最边缘的子区域后可以触发邻小区测量，也可以计算到达小区边缘的时间，以确定是否发生切换或者测量行为。以图5为例，当终端设备位于子区域NTN3时，可以触发邻小区测量。
为便于理解，下面以准地球移动小区为例，结合图7对可能的实现方式进行说明。
参见图7，在T0时刻，终端设备属于A区域的子区域NTN2。随着网络设备的移动，在T1时刻，终端设备属于B区域的子区域NTN3。此时终端设备需要重新计算在B区域的服务时间和离小区边缘 的距离。终端设备可以通过周期性地收到网络设备的广播/上层信令消息，确定网络设备的相关参数。相关参数例如是图7所示的小区半径，网络设备偏移量等。终端设备可以根据这些参数来重新计算自己到达小区边缘的时间，并确定是否发生切换或者测量等行为。
在一些实施例中，终端设备可以基于第一参数和松弛测量区域确定是否触发邻小区测量。松弛测量区域可以与多种参数对应，以确定多种触发邻小区测量的参数范围。当终端设备对应的参数在该参数范围内时，触发邻小区测量。当终端设备对应的参数不在该参数范围内时，终端设备不需要进行与邻小区测量相关或者进一步的计算与测量。通过设置松弛测量区域，可以减少终端设备进行测量的次数，从而降低功耗。
作为可能的实现方式，松弛测量区域可以分别与前文所述的时间参数、距离参数和角度参数对应。根据松弛测量测量区域对应的参数范围，终端设备可以基于第一参数确定终端设备对应的参数，从而判断是否需要触发邻小区测量。
例如，松弛测量区域可以与网络设备的覆盖角度对应。以图5所示的覆盖角度为例，松弛测量区域对应的参数范围可以设置为[α2,α3]。终端设备对应的覆盖角度根据第一参数确定。如果终端设备对应的覆盖角度不属于[α2,α3]，终端设备不需要执行与邻小区测量相关的测试，有助于减少功耗。如果终端设备对应的覆盖角度属于[α2,α3]，则触发邻小区测量。
例如，松弛测量区域可以对应终端设备与网络设备之间的距离。松弛测量区域对应的参数范围可以设置为[L2,L3]。终端设备与网络设备之间的距离可以直接根据第一参数确定。只有当终端设备与网络设备之间的距离属于范围[L2,L3]时，终端设备才触发邻小区测量。
在上述的实施例中，终端设备可以根据所在的子区域确定是否执行用于触发邻小区测量的相关测量。也就是说，终端设备可以先确定在哪个子区域，只有在最边缘的子区域时才进行上述用于触发邻小区测量的时间、距离或角度的相关测量。仍以图5为例，如果终端设备位于NTN2中，终端设备不需要触发邻小区测量，也不需要计算或测量与阈值进行对比的参数。因此，基于更精细的小区划分，可以使得终端设备更好地进行测量，提升终端设备执行邻小区测量的效果，同时通过减少不必要的测量而降低终端设备的功耗。
前文提到，图5介绍的NTN小区划分方式适用于准地球固定小区和准地球移动小区。
对于准地球固定小区，NTN小区的覆盖范围可以划分为多个子区域。例如，准地球固定小区的NTN小区覆盖范围可以按图5所示的方式划分为n个等分的子区域，或者根据TN覆盖的程度和范围划分为不等分的几个子区域。
在准地球固定小区的情况下，NTN小区的覆盖范围不变，但是网络设备与终端设备的相对距离一直在改变。在一段时间之后，当前网络设备的信号可能无法覆盖该终端设备。例如，当服务链路距离L小于服务链路的最大距离Lmax以及终端设备对应的第一网络设备的覆盖角度小于αmax时，终端设备在第一网络设备的覆盖范围内。又如，当服务链路距离大于最大距离，或者终端设备对应的第一网络设备的覆盖角度大于αmax时，终端设备已脱离第一网络设备的覆盖范围。终端设备可以与接替第一网络设备服务该区域的第二网络设备进行通信。也就是说，对于准地球固定小区，如果终端设备位置不动，终端设备会一直在相同的子区域内。但是，为终端设备提供服务的网络设备在发生变化。
对于准地球移动小区，NTN小区的覆盖范围随着网络设备的移动而变化。对NTN小区进行小区划分后，终端设备所在的子区域会随着网络设备的移动而变化。如果终端设备固定不动，终端设备所在的子区域会发生变化。终端设备可以根据网络设备发送的消息(例如，前文所述的第一消息)，确定所在的子区域以及后续的变化情况。如果终端设备为运动状态，终端设备需要周期性地接收网络设备的消息，以确定当前和后续所在的子区域，从而确定是否触发邻小区测量及其相关测量和计算。
在一些实施例中，网络设备通过广播信息/系统信息/专有信令可以向终端设备提供小区中心的天线波束角以及小区半径。通过小区中心的波束角可以确定子卫星点的方向以及服务链路的距离。网络设备还可以向终端设备提供NTN小区划分，根据所在地理位置，不同天线方向角，NTN划分的子区域可以是不同的。终端设备根据网络设备的天线方向角、移动速度可以计算小区中心参考位置的坐标。此外，终端设备还需要小区半径或阈值来计算小区的边缘。
在一些实施例中，当网络设备移动时，可以设置时间阈值T。每经过T时间，网络设备可以向终端设备提供参考信息。网络设备可以每次为移动小区提供更新的星历参数，或者是提供带有时间戳的星历参数。此外，网络设备也可向移动小区提供多个参考位置及其时间信息或者移动速度。当终端设 备可以确定自己到达小区边缘的时间后，终端设备也就知道何时发起小区测量和小区切换。
如前文所述，NTN小区还可以通过其他方式进行小区划分。图8和图9为两种可能的划分方式。
参见图8，通过相互交错的四条直径将NTN小区等分为8个子区域。该8个子区域分别是子区域a、子区域b、子区域c、子区域d、子区域e、子区域f、子区域g以及子区域h。如图8所示，在子区域a、子区域b、子区域e中分别有TN小区。
参见图9，通过井字形的方式将NTN小区划分为9个子区域。该9个子区域分别是子区域a、子区域b、子区域c、子区域d、子区域e、子区域f、子区域g、子区域h以及子区域i。如图9所示，在子区域f、子区域h分别有TN小区。
如果图8和图9中的子区域中存在TN单元，则可以通过一定的指示信息进行指示。例如，指示信息包含TN单元的子区域对应的比特位设置为1，否则设置为0。区域划分规则和编号规则可以预先配置给终端设备。通过这种方式，网络设备只需要向终端设备提供几个比特就可以指示TN小区的位置。作为可能的实现方式，网络设备可以通过广播或者系统信息块(system information block，SIB)消息、无线资源控制(radio resource control，RRC)消息将上述指示消息通知终端设备。终端设备一旦接收到该指示信息，终端设备就可以借助于NTN小区的参考位置和半径来计算TN小区的粗略面积范围。
上文结合图4至图9，详细地描述了本申请的方法实施例。下面结合图10至图12，详细描述本申请的装置实施例。应理解，装置实施例的描述与方法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10为本申请一个实施例提供的用于无线通信的装置的示意性框图。该装置1000可以为上文描述的任意一种终端设备。图10所示的装置1000包括测量单元1010。
测量单元1010，可用于基于第一参数在NTN小区执行邻小区测量，第一参数与以下信息中的一种或多种关联：终端设备与NTN小区对应的网络设备之间的距离；NTN小区对应的网络设备距离地面的高度；NTN小区对应的网络设备的天线的方向角；以及NTN小区中的子区域。
可选地，NTN小区中的子区域基于NTN小区对应的网络设备的覆盖角度确定，覆盖角度小于或者等于天线的方向角。
可选地，网络设备与地面垂直的投影位置为第一位置，覆盖角度对应子区域的边界，子区域的边界包括以第一位置为圆心的曲线。
可选地，NTN小区包括N个子区域，其中N为大于1的自然数，N个子区域远离第一位置的边界分别对应的N个覆盖角度满足以下条件：
0＜αi＜αi+1≤αN；
其中，αi为N个子区域中第i个子区域远离第一位置的边界对应的覆盖角度，i为1到N-1的自然数，αN为天线的方向角。
可选地，NTN小区包括N个子区域，其中N为大于1的自然数，N个子区域等分或者不等分NTN小区的覆盖区域。
可选地，NTN小区中的子区域还根据以下中的一种或多种信息确定：NTN小区对应的网络设备的坐标；NTN小区覆盖区域的地理环境；NTN小区覆盖区域内TN小区的分布情况；NTN小区信号交互的限制；终端设备的测量要求和/或切换要求；以及终端设备提供的辅助信息。
可选地，第一参数根据终端设备与NTN小区对应的网络设备之间的距离和高度的比值确定。
可选地，装置1000还包括确定单元，可用于根据第一参数确定第二参数，第二参数用于指示终端设备到达NTN小区边缘的时间；根据第二参数确定是否触发邻小区测量。
可选地，第二参数还根据以下中的一种或多种信息确定：网络设备的天线的方向角；NTN小区中的子区域。
可选地，第二参数根据网络设备的天线的方向角确定，终端设备到达NTN小区边缘的时间t满足以下条件：
t＝(αN-αn)/Δγ；
其中，αN为网络设备的天线的方向角，αn为终端设备所在位置对应的网络设备的覆盖角度，Δγ为相对角速度，Δγ＝γ1-γ2，γ1为网络设备的角速度，γ2为地球自转的角速度。
可选地，NTN小区包括N个子区域，其中N为大于1的自然数，装置1000还包括设置单元，可用于设置时间测量阈值，时间测量阈值对应N个子区域中包括NTN小区的边缘的子区域；测量单元 1010还可用于在时间测量阈值的起始时间执行邻小区测量。
可选地，N个子区域的边界以网络设备的第一位置为圆心，第一位置为网络设备与地面垂直的投影位置，终端设备位于N个子区域中的第i个子区域，其中i为1到N-1的自然数，终端设备到达NTN小区边缘的时间t满足以下条件：
t＝(αN-αi)/Δγ；
其中，αN为网络设备的天线的方向角，αi为第i个子区域远离第一位置的边界对应的网络设备的覆盖角度，Δγ为相对角速度，Δγ＝γ1-γ2，γ1为网络设备的角速度，γ2为地球自转的角速度。
可选地，确定单元还用于根据第一参数确定第二参数，第二参数用于指示终端设备对应的网络设备的覆盖角度；根据第二参数确定是否触发邻小区测量。
可选地，NTN小区包括N个子区域，其中N为大于1的自然数，网络设备的天线的方向角用于确定与NTN小区的N个子区域一一对应的N个角度区域，测量单元1010还用于如果终端设备对应的网络设备的覆盖角度位于包括天线的方向角的角度区域，则触发邻小区测量。
可选地，确定单元还用于根据第一参数确定第二参数，第二参数用于指示终端设备与NTN小区边缘之间的距离；根据第二参数确定是否触发邻小区测量。
可选地，第二参数还根据以下中的一种或多种信息确定：NTN小区对应的网络设备基于参考位置确定的偏移量；NTN小区对应的网络设备的星历表数据；NTN小区对应的网络设备的移动速度；NTN小区对应的网络设备的运动轨迹；以及终端设备的移动信息。
可选地，第一参数用于确定终端设备到达NTN小区边缘的时间，第二参数根据终端设备的移动信息和到达NTN小区边缘的时间确定。
可选地，NTN小区为准地球移动小区，第二参数与NTN小区对应的网络设备基于参考位置确定的偏移量相关，参考位置为网络设备对应第一时间点的第一投影位置，偏移量为网络设备对应第二时间点的第二投影位置与第一投影位置之间的距离，偏移量用于确定终端设备在第二时间点与网络设备之间的距离。
可选地，终端设备在第二时间点与网络设备之间的距离还根据终端设备的位置信息确定。
可选地，网络设备的运动轨迹与第一投影位置和第二投影位置相关，终端设备在第二时间点与网络设备之间的距离d2满足以下条件：
d2＝d1sinθ1/sinθ2；
其中，d1表示终端设备在第一时间点与网络设备之间的距离；d2表示终端设备在第二时间点与网络设备之间的距离；θ1表示终端设备与参考位置的连线与运动轨迹的夹角；θ2表示终端设备与第二投影位置的连线与运动轨迹的夹角。
可选地，夹角θ2满足以下条件：
θ2＝180-arctg[d1sinθ1/(Loffset-d1cosθ1)]；
其中，Loffset表示网络设备在第二时间点基于参考位置的偏移量。
可选地，第一参数用于确定终端设备所在的子区域，确定单元还用于根据所在的子区域确定是否触发邻小区测量。
可选地，确定单元还用于基于第一参数和松弛测量区域确定是否触发邻小区测量；其中，松弛测量区域用于确定触发邻小区测量的参数范围，第一参数用于确定终端设备与参数范围对应的参数值。
图11是本申请另一实施例提供的用于无线通信的装置的示意性框图。该装置1100可以为上文描述的任意一种网络设备。图11所示的装置1100包括发送单元1110。
发送单元1110，可用于向终端设备发送第一参数，第一参数用于终端设备在NTN小区执行邻小区测量，第一参数与以下信息中的一种或多种关联：终端设备与网络设备之间的距离；网络设备距离地面的高度；网络设备的天线的方向角；以及NTN小区中的子区域。
可选地，NTN小区中的子区域基于网络设备的覆盖角度确定，覆盖角度小于或者等于天线的方向角。
可选地，网络设备与地面垂直的投影位置为第一位置，覆盖角度对应子区域的边界，子区域的边界包括以第一位置为圆心的曲线。
可选地，NTN小区包括N个子区域，其中N为大于1的自然数，N个子区域远离第一位置的边界分别对应的N个覆盖角度满足以下条件：
0＜αi＜αi+1≤αN；
其中，αi为N个子区域中第i个子区域远离第一位置的边界对应的覆盖角度，i为1到N-1的自然数，αN为天线的方向角。
可选地，NTN小区包括N个子区域，其中N为大于1的自然数，N个子区域等分或者不等分NTN小区的覆盖区域。
可选地，NTN小区中的子区域还根据以下中的一种或多种信息确定：网络设备的坐标；NTN小区覆盖区域的地理环境；NTN小区覆盖区域内地面网络TN小区的分布情况；NTN小区信号交互的限制；终端设备的测量要求和/或切换要求；以及终端设备提供的辅助信息。
可选地，第一参数根据终端设备与网络设备之间的距离和高度的比值确定。
可选地，发送单元1110还用于向终端设备发送第一信息，第一信息用于终端设备确定是否触发邻小区测量；其中，第一信息包括以下中的一种或多种信息：网络设备基于参考位置确定的偏移量；网络设备的星历表数据；网络设备的移动速度；以及网络设备的运动轨迹。
可选地，第一参数和第一信息承载于以下的一种或多种信息中：广播信息、系统信息以及专有信令。
图12所示为本申请实施例提供的通信装置的示意性结构图。图12中的虚线表示该单元或模块为可选的。该装置1200可用于实现上述方法实施例中描述的方法。装置1200可以是芯片、终端设备或者网络设备。
装置1200可以包括一个或多个处理器1210。该处理器1210可支持装置1200实现前文方法实施例所描述的方法。该处理器1210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1200还可以包括一个或多个存储器1220。存储器1220上存储有程序，该程序可以被处理器1210执行，使得处理器1210执行前文方法实施例所描述的方法。存储器1220可以独立于处理器1210也可以集成在处理器1210中。
装置1200还可以包括收发器1230。处理器1210可以通过收发器1230与其他设备或芯片进行通信。例如，处理器1210可以通过收发器1230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。
在一些实施例中，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。
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。
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。
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。
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。
在本申请的实施例中，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。
在本申请实施例中，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。
在本申请的实施例中，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。
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。
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 (40)

  1. 一种用于无线通信的方法，其特征在于，包括：
    终端设备基于第一参数在非地面网络NTN小区执行邻小区测量，所述第一参数与以下信息中的一种或多种关联：
    所述终端设备与所述NTN小区对应的网络设备之间的距离；
    所述NTN小区对应的网络设备距离地面的高度；
    所述NTN小区对应的网络设备的天线的方向角；以及
    所述NTN小区中的子区域。
  2. 根据权利要求1所述的方法，其特征在于，所述NTN小区中的子区域基于所述NTN小区对应的网络设备的覆盖角度确定，所述覆盖角度小于或者等于所述天线的方向角。
  3. 根据权利要求2所述的方法，其特征在于，所述网络设备与地面垂直的投影位置为第一位置，所述覆盖角度对应所述子区域的边界，所述子区域的边界包括以所述第一位置为圆心的曲线。
  4. 根据权利要求3所述的方法，其特征在于，所述NTN小区包括N个子区域，其中N为大于1的自然数，所述N个子区域远离所述第一位置的边界分别对应的N个覆盖角度满足以下条件：
    0＜αi＜αi+1≤αN；
    其中，αi为所述N个子区域中第i个子区域远离所述第一位置的边界对应的覆盖角度，i为1到N-1的自然数，αN为所述天线的方向角。
  5. 根据权利要求2所述的方法，所述NTN小区包括N个子区域，其中N为大于1的自然数，所述N个子区域等分或者不等分所述NTN小区的覆盖区域。
  6. 根据权利要求2所述的方法，其特征在于，所述NTN小区中的子区域还根据以下中的一种或多种信息确定：
    所述NTN小区对应的网络设备的坐标；
    所述NTN小区覆盖区域的地理环境；
    所述NTN小区覆盖区域内地面网络TN小区的分布情况；
    所述NTN小区信号交互的限制；
    所述终端设备的测量要求和/或切换要求；以及
    所述终端设备提供的辅助信息。
  7. 根据权利要求1-6中任一项所述的方法，其特征在于，所述第一参数根据所述终端设备与所述NTN小区对应的网络设备之间的距离和所述高度的比值确定。
  8. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    所述终端设备根据所述第一参数确定第二参数，所述第二参数用于指示所述终端设备到达所述NTN小区边缘的时间；
    所述终端设备根据所述第二参数确定是否触发所述邻小区测量。
  9. 根据权利要求8所述的方法，其特征在于，所述第二参数还根据以下中的一种或多种信息确定：
    所述网络设备的天线的方向角；
    所述NTN小区中的子区域。
  10. 根据权利要求9所述的方法，其特征在于，所述第二参数根据所述网络设备的天线的方向角确定，所述终端设备到达所述NTN小区边缘的时间t满足以下条件：
    t＝(αN-αn)/Δγ；
    其中，αN为所述网络设备的天线的方向角，αn为所述终端设备所在位置对应的所述网络设备的覆盖角度，Δγ为相对角速度，Δγ＝γ1-γ2，γ1为所述网络设备的角速度，γ2为地球自转的角速度。
  11. 根据权利要求9所述的方法，其特征在于，所述NTN小区包括N个子区域，其中N为大于1的自然数，所述终端设备根据所述第二参数确定是否触发所述邻小区测量，包括：
    所述终端设备设置时间测量阈值，所述时间测量阈值对应所述N个子区域中包括所述NTN小区的边缘的子区域；
    所述终端设备在所述时间测量阈值的起始时间执行所述邻小区测量。
  12. 根据权利要求11所述的方法，其特征在于，所述N个子区域的边界以所述网络设备的第一位 置为圆心，所述第一位置为所述网络设备与地面垂直的投影位置，所述终端设备位于所述N个子区域中的第i个子区域，其中i为1到N-1的自然数，所述终端设备到达所述NTN小区边缘的时间t满足以下条件：
    t＝(αN-αi)/Δγ；
    其中，αN为所述网络设备的天线的方向角，αi为所述第i个子区域远离所述第一位置的边界对应的所述网络设备的覆盖角度，Δγ为相对角速度，Δγ＝γ1-γ2，γ1为所述网络设备的角速度，γ2为地球自转的角速度。
  13. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    所述终端设备根据所述第一参数确定第二参数，所述第二参数用于指示所述终端设备对应的所述网络设备的覆盖角度；
    所述终端设备根据所述第二参数确定是否触发所述邻小区测量。
  14. 根据权利要求13所述的方法，其特征在于，所述NTN小区包括N个子区域，其中N为大于1的自然数，所述网络设备的天线的方向角用于确定与所述NTN小区的N个子区域一一对应的N个角度区域，所述终端设备根据所述第二参数确定是否触发所述邻小区测量，包括：
    如果所述终端设备对应的所述网络设备的覆盖角度位于包括所述天线的方向角的角度区域，则所述终端设备触发所述邻小区测量。
  15. 根据权利要求1-6中任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备根据所述第一参数确定第二参数，所述第二参数用于指示所述终端设备与所述NTN小区边缘之间的距离；
    所述终端设备根据所述第二参数确定是否触发所述邻小区测量。
  16. 根据权利要求15所述的方法，其特征在于，所述第二参数还根据以下中的一种或多种信息确定：
    所述NTN小区对应的网络设备基于参考位置确定的偏移量；
    所述NTN小区对应的网络设备的星历表数据；
    所述NTN小区对应的网络设备的移动速度；
    所述NTN小区对应的网络设备的运动轨迹；以及
    所述终端设备的移动信息。
  17. 根据权利要求16所述的方法，其特征在于，所述第一参数用于确定所述终端设备到达所述NTN小区边缘的时间，所述第二参数根据所述终端设备的移动信息和到达所述NTN小区边缘的时间确定。
  18. 根据权利要求16所述的方法，其特征在于，所述NTN小区为准地球移动小区，所述第二参数与所述NTN小区对应的网络设备基于参考位置确定的偏移量相关，所述参考位置为所述网络设备对应第一时间点的第一投影位置，所述偏移量为所述网络设备对应第二时间点的第二投影位置与所述第一投影位置之间的距离，所述偏移量用于确定所述终端设备在所述第二时间点与所述网络设备之间的距离。
  19. 根据权利要求18所述的方法，其特征在于，所述终端设备在所述第二时间点与所述网络设备之间的距离还根据所述终端设备的位置信息确定。
  20. 根据权利要求18所述的方法，其特征在于，所述网络设备的运动轨迹与所述第一投影位置和所述第二投影位置相关，所述终端设备在所述第二时间点与所述网络设备之间的距离d2满足以下条件：
    d2＝d1sinθ1/sinθ2；
    其中，d1表示所述终端设备在所述第一时间点与所述网络设备之间的距离；d2表示所述终端设备在所述第二时间点与所述网络设备之间的距离；θ1表示所述终端设备与所述参考位置的连线与所述运动轨迹的夹角；θ2表示所述终端设备与所述第二投影位置的连线与所述运动轨迹的夹角。
  21. 根据权利要求20所述的方法，其特征在于，所述夹角θ2满足以下条件：
    θ2＝180-arctg[d1sinθ1/(Loffset-d1cosθ1)]；
    其中，Loffset表示所述网络设备在所述第二时间点基于所述参考位置的偏移量。
  22. 根据权利要求1-6中任一项所述的方法，其特征在于，所述第一参数用于确定所述终端设备所在的子区域，所述方法还包括：
    所述终端设备根据所在的子区域确定是否触发所述邻小区测量。
  23. 根据权利要求1-6中任一项所述的方法，其特征在于，所述终端设备基于第一参数在NTN小区执行邻小区测量，包括：
    所述终端设备基于第一参数和松弛测量区域确定是否触发所述邻小区测量；
    其中，所述松弛测量区域用于确定触发所述邻小区测量的参数范围，所述第一参数用于确定所述终端设备与所述参数范围对应的参数值。
  24. 一种用于无线通信的方法，其特征在于，包括：
    网络设备向终端设备发送第一参数，所述第一参数用于所述终端设备在非地面网络NTN小区执行邻小区测量，所述第一参数与以下信息中的一种或多种关联：
    所述终端设备与所述网络设备之间的距离；
    所述网络设备距离地面的高度；
    所述网络设备的天线的方向角；以及
    所述NTN小区中的子区域。
  25. 根据权利要求24所述的方法，其特征在于，所述NTN小区中的子区域基于所述网络设备的覆盖角度确定，所述覆盖角度小于或者等于所述天线的方向角。
  26. 根据权利要求25所述的方法，其特征在于，所述网络设备与地面垂直的投影位置为第一位置，所述覆盖角度对应所述子区域的边界，所述子区域的边界包括以所述第一位置为圆心的曲线。
  27. 根据权利要求26所述的方法，其特征在于，所述NTN小区包括N个子区域，其中N为大于1的自然数，所述N个子区域远离所述第一位置的边界分别对应的N个覆盖角度满足以下条件：
    0＜αi＜αi+1≤αN；
    其中，αi为所述N个子区域中第i个子区域远离所述第一位置的边界对应的覆盖角度，i为1到N-1的自然数，αN为所述天线的方向角。
  28. 根据权利要求25所述的方法，所述NTN小区包括N个子区域，其中N为大于1的自然数，所述N个子区域等分或者不等分所述NTN小区的覆盖区域。
  29. 根据权利要求25所述的方法，其特征在于，所述NTN小区中的子区域还根据以下中的一种或多种信息确定：
    所述网络设备的坐标；
    所述NTN小区覆盖区域的地理环境；
    所述NTN小区覆盖区域内地面网络TN小区的分布情况；
    所述NTN小区信号交互的限制；
    所述终端设备的测量要求和/或切换要求；以及
    所述终端设备提供的辅助信息。
  30. 根据权利要求24-29中任一项所述的方法，其特征在于，所述第一参数根据所述终端设备与所述网络设备之间的距离和所述高度的比值确定。
  31. 根据权利要求24-29中任一项所述的方法，其特征在于，所述方法还包括：
    所述网络设备向所述终端设备发送第一信息，所述第一信息用于所述终端设备确定是否触发所述邻小区测量；
    其中，所述第一信息包括以下中的一种或多种信息：
    所述网络设备基于参考位置确定的偏移量；
    所述网络设备的星历表数据；
    所述网络设备的移动速度；以及
    所述网络设备的运动轨迹。
  32. 根据权利要求31所述的方法，其特征在于，所述第一参数和所述第一信息承载于以下的一种或多种信息中：广播信息、系统信息以及专有信令。
  33. 一种用于无线通信的装置，其特征在于，所述装置为终端设备，所述终端设备包括：
    测量单元，用于基于第一参数在非地面网络NTN小区执行邻小区测量，所述第一参数与以下信息中的一种或多种关联：
    所述终端设备与所述NTN小区对应的网络设备之间的距离；
    所述NTN小区对应的网络设备距离地面的高度；
    所述NTN小区对应的网络设备的天线的方向角；以及
    所述NTN小区中的子区域。
  34. 一种用于无线通信的装置，其特征在于，所述装置为网络设备，所述网络设备包括：
    发送单元，用于向终端设备发送第一参数，所述第一参数用于所述终端设备在非地面网络NTN小区执行邻小区测量，所述第一参数与以下信息中的一种或多种关联：
    所述终端设备与所述网络设备之间的距离；
    所述网络设备距离地面的高度；
    所述网络设备的天线的方向角；以及
    所述NTN小区中的子区域。
  35. 一种通信装置，其特征在于，包括存储器和处理器，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，以执行如权利要求1-32中任一项所述的方法。
  36. 一种通信装置，其特征在于，包括处理器，用于从存储器中调用程序，以执行如权利要求1-32中任一项所述的方法。
  37. 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1-32中任一项所述的方法。
  38. 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1-32中任一项所述的方法。
  39. 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1-32中任一项所述的方法。
  40. 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1-32中任一项所述的方法。
PCT/CN2023/082071 2023-02-01 2023-03-17 用于无线通信的方法及装置 Ceased WO2024159585A1 (zh)

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