WO2022134065A1 - 小区重选的方法、装置、通信设备及存储介质 - Google Patents

小区重选的方法、装置、通信设备及存储介质 Download PDF

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Publication number
WO2022134065A1
WO2022134065A1 PCT/CN2020/139604 CN2020139604W WO2022134065A1 WO 2022134065 A1 WO2022134065 A1 WO 2022134065A1 CN 2020139604 W CN2020139604 W CN 2020139604W WO 2022134065 A1 WO2022134065 A1 WO 2022134065A1
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Prior art keywords
information
terminal
ntn
serving cell
cell
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PCT/CN2020/139604
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English (en)
French (fr)
Inventor
李小龙
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Beijing Xiaomi Mobile Software Co Ltd
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Beijing Xiaomi Mobile Software Co Ltd
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Publication date
Application filed by Beijing Xiaomi Mobile Software Co Ltd filed Critical Beijing Xiaomi Mobile Software Co Ltd
Priority to CN202080004197.XA priority Critical patent/CN115088302A/zh
Priority to PCT/CN2020/139604 priority patent/WO2022134065A1/zh
Priority to US18/257,691 priority patent/US12537595B2/en
Priority to EP20966629.6A priority patent/EP4271038A4/en
Publication of WO2022134065A1 publication Critical patent/WO2022134065A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
    • H04B7/18539—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection
    • H04B7/18541—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection for handover of resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—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
    • 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
    • H04W36/00837—Determination of triggering parameters for hand-off
    • 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
    • H04W36/249—Reselection being triggered by specific parameters according to timing information
    • 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 disclosure relates to the field of wireless communication technologies, but is not limited to the field of wireless communication technologies, and in particular, to a method, apparatus, communication device, and storage medium for cell reselection.
  • the terminal can perform cell selection and reselection according to the S criterion and the R criterion. For example, the terminal can measure the The obvious difference between the RSRP of the reference signal received power (RSRP, Reference Signal Receiving Power) and the RSRP of the cell center is used to determine whether the terminal is at the edge of the cell, so as to perform neighbor cell measurement and cell reselection.
  • RSRP Reference Signal Receiving Power
  • NTN Non-Terrestrial Networks
  • the embodiments of the present disclosure disclose a method, an apparatus, a communication device, and a storage medium for cell reselection.
  • a method for cell reselection wherein, applied to a terminal, the method includes:
  • the service time is the time when the non-terrestrial network NTN serving cell can provide service to the terminal;
  • the auxiliary information includes: coverage information of the NTN serving cell, ephemeris information and/or the NTN
  • the serving cell can provide reference service time information of the service.
  • a method for cell reselection wherein, applied to a base station, the method includes:
  • the auxiliary information is used for the terminal to determine the service time that the NTN serving cell can provide services to the terminal;
  • the auxiliary information includes: coverage information, ephemeris information and/or information of the NTN serving cell Or the reference time information that the NTN serving cell can provide the service.
  • an apparatus for cell reselection wherein, applied to a terminal, the apparatus includes a determining module; wherein,
  • the determining module is configured to: determine the execution operation of performing cell reselection according to the service time determined based on the assistance information;
  • the service time is the time when the non-terrestrial network NTN serving cell can provide service to the terminal;
  • the auxiliary information includes: coverage information of the NTN serving cell, ephemeris information and/or the NTN
  • the serving cell can provide reference service time information of the service.
  • an apparatus for cell reselection wherein, applied to a base station, the apparatus includes a sending module; wherein,
  • the sending module is configured to send auxiliary information to the terminal
  • the auxiliary information is used for the terminal to determine the service time that the NTN serving cell can provide services to the terminal;
  • the auxiliary information includes: coverage information, ephemeris information and/or information of the NTN serving cell Or the reference time information that the NTN serving cell can provide the service.
  • a communication device comprising:
  • a memory for storing the processor-executable instructions
  • the processor is configured to: when executing the executable instructions, implement the method described in any embodiment of the present disclosure.
  • a computer storage medium stores a computer-executable program, and the executable program implements the method described in any embodiment of the present disclosure when the executable program is executed by a processor.
  • the execution operation of performing the cell reselection is determined according to the service time determined based on the auxiliary information; wherein, the service time is the time when the NTN serving cell can provide the service to the terminal; the auxiliary information, Including: coverage information of the NTN serving cell, ephemeris information and/or reference service time information that the NTN serving cell can provide services.
  • the service time can be determined according to the auxiliary information, in the NTN network, the execution operation of performing cell reselection is determined according to the service time, compared with the use of the measurement result of the signal quality to determine the execution operation of cell reselection.
  • the execution operation of the cell reselection can be adapted to the auxiliary information, and the terminal can perform the cell reselection in a timely and reliable manner.
  • FIG. 1 is a schematic structural diagram of a wireless communication system.
  • Fig. 2 is a schematic diagram showing a method for wireless communication according to an exemplary embodiment.
  • Fig. 3 is a schematic diagram showing a method for wireless communication according to an exemplary embodiment.
  • Fig. 4 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 5 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 6 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 7 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 8 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 9 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 10 is a schematic diagram illustrating a method for determining service time according to an exemplary embodiment.
  • Fig. 11 is a schematic diagram of a method for determining service time according to an exemplary embodiment.
  • Fig. 12 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 13 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 14 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 15 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 16 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 17 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 18 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 19 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 20 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 21 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 22 is a schematic diagram of an apparatus for cell reselection according to an exemplary embodiment.
  • Fig. 23 is a schematic diagram of an apparatus for cell reselection according to an exemplary embodiment.
  • FIG. 24 is a schematic structural diagram of a terminal according to an exemplary embodiment.
  • Fig. 25 is a block diagram of a base station according to an exemplary embodiment.
  • first, second, third, etc. may be used in embodiments of the present disclosure to describe various pieces of information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other.
  • the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information.
  • the word "if” as used herein can be interpreted as "at the time of” or "when” or "in response to determining.”
  • the terms “greater than” or “less than” are used herein when characterizing the relationship of size. However, those skilled in the art can understand that the term “greater than” also covers the meaning of “greater than or equal to”, and “less than” also covers the meaning of "less than or equal to”.
  • FIG. 1 shows a schematic structural diagram of a wireless communication system provided by an embodiment of the present disclosure.
  • the wireless communication system is a communication system based on a mobile communication technology, and the wireless communication system may include: several user equipments 110 and several base stations 120 .
  • the user equipment 110 may be a device that provides voice and/or data connectivity to the user.
  • User equipment 110 may communicate with one or more core networks via a Radio Access Network (RAN), and user equipment 110 may be IoT user equipment such as sensor devices, mobile phones (or "cellular" phones) ) and a computer with IoT user equipment, for example, may be stationary, portable, pocket-sized, hand-held, computer-built or vehicle-mounted.
  • RAN Radio Access Network
  • IoT user equipment such as sensor devices, mobile phones (or "cellular" phones)
  • a computer with IoT user equipment for example, may be stationary, portable, pocket-sized, hand-held, computer-built or vehicle-mounted.
  • station Ses, STA
  • subscriber unit subscriber unit
  • subscriber station subscriber station
  • mobile station mobile station
  • mobile station mobile station
  • remote station remote station
  • access terminal remote user equipment
  • the user equipment 110 may also be a device of an unmanned aerial vehicle.
  • the user equipment 110 may also be an in-vehicle device, for example, a trip computer with a wireless communication function, or a wireless user equipment connected to an external trip computer.
  • the user equipment 110 may also be a roadside device, for example, may be a street light, a signal light, or other roadside devices with a wireless communication function.
  • the base station 120 may be a network-side device in a wireless communication system.
  • the wireless communication system may be the 4th generation mobile communication (4G) system, also known as the Long Term Evolution (Long Term Evolution, LTE) system; or, the wireless communication system may also be a 5G system, Also known as New Radio System or 5G NR System.
  • the wireless communication system may also be a next-generation system of the 5G system.
  • the access network in the 5G system can be called NG-RAN (New Generation-Radio Access Network, a new generation of radio access network).
  • the base station 120 may be an evolved base station (eNB) used in the 4G system.
  • the base station 120 may also be a base station (gNB) that adopts a centralized distributed architecture in a 5G system.
  • eNB evolved base station
  • gNB base station
  • the base station 120 adopts a centralized distributed architecture it usually includes a centralized unit (central unit, CU) and at least two distributed units (distributed unit, DU).
  • the centralized unit is provided with a protocol stack of a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control Protocol (Radio Link Control, RLC) layer, and a Media Access Control (Media Access Control, MAC) layer; distribution A physical (Physical, PHY) layer protocol stack is set in the unit, and the specific implementation manner of the base station 120 is not limited in this embodiment of the present disclosure.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control Protocol
  • MAC Media Access Control
  • distribution A physical (Physical, PHY) layer protocol stack is set in the unit, and the specific implementation manner of the base station 120 is not limited in this embodiment of the present disclosure.
  • a wireless connection can be established between the base station 120 and the user equipment 110 through a wireless air interface.
  • the wireless air interface is a wireless air interface based on the fourth generation mobile communication network technology (4G) standard; or, the wireless air interface is a wireless air interface based on the fifth generation mobile communication network technology (5G) standard, such as
  • the wireless air interface is a new air interface; alternatively, the wireless air interface may also be a wireless air interface based on a 5G next-generation mobile communication network technology standard.
  • an E2E (End to End, end-to-end) connection may also be established between the user equipments 110 .
  • V2V vehicle to vehicle, vehicle-to-vehicle
  • V2I vehicle to Infrastructure, vehicle-to-roadside equipment
  • V2P vehicle to pedestrian, vehicle-to-person communication in vehicle-to-everything (V2X) communication etc. scene.
  • the above-mentioned user equipment may be regarded as the terminal equipment of the following embodiments.
  • the above wireless communication system may further include a network management device 130 .
  • the network management device 130 may be a core network device in a wireless communication system.
  • the network management device 130 may be a mobility management entity (Mobility Management Entity) in an evolved packet core network (Evolved Packet Core, EPC). MME).
  • the network management device may also be other core network devices, such as a serving gateway (Serving GateWay, SGW), a public data network gateway (Public Data Network GateWay, PGW), a policy and charging rule functional unit (Policy and Charging Rules) Function, PCRF) or home subscriber server (Home Subscriber Server, HSS), etc.
  • the implementation form of the network management device 130 is not limited in this embodiment of the present disclosure.
  • NTN was introduced.
  • FIG. 2 is a schematic diagram of the received signal strength of a signal received by a terminal in a TN wireless communication scenario.
  • the TN includes land network base stations and terminals.
  • FIG. 3 is a schematic diagram of received signal strength of a signal received by a terminal in an NTN wireless communication scenario.
  • the NTN includes non-terrestrial network base stations and terminals.
  • the terminal may determine whether the terminal is at the cell edge according to the apparent difference in RSRP between the cell center and the cell edge.
  • the terminal may determine whether the terminal is at the cell edge according to the apparent difference in reference signal receiving quality (RSRQ, Reference Signal Receiving Quality) between the cell center and the cell edge.
  • RSRQ Reference Signal Receiving Quality
  • the cell radius is large, and the terminal is at the center or edge of the cell.
  • the difference between the RSRP and RSRQ measured by the terminal is small, and the near-far effect is not obvious.
  • a large cell radius results in a large overlapping area of cells, which is prone to "ping-pong" handover.
  • "ping-pong" handover is a round-trip cell reselection between different cells.
  • the terminal performs cell selection or reselection according to the S criterion and the R criterion.
  • the S criterion is:
  • Srxlev is the cell selection received value
  • the terminal needs to satisfy the S criterion for cell selection or reselection.
  • the terminal may choose not to measure the co-frequency cell.
  • SIntraSearchP is used to start the RSRP signal level threshold value of the same frequency measurement
  • SIntraSearchQ is used to start the RSRQ signal quality threshold for intra-frequency measurement.
  • the terminal In response to the above conditions not being satisfied, the terminal starts to measure the neighbor cells, and then selects the target cell according to the R criterion to complete the cell reselection.
  • the R criterion is:
  • Rn Qmeas.n-Qoffset-Qoffset temp ;
  • Rs is the R value of the serving cell
  • Rn is the R value of the adjacent cell
  • Qmeas.s is the RSRP measurement value of the serving cell
  • Qmeas.n is the RSRP measurement value of the neighboring cell
  • Qhyst is the cell reselection hysteresis value
  • Qoffset temp is the temporary offset value
  • Qoffset is the offset value.
  • a method for cell reselection is provided in this embodiment, wherein, applied to a terminal, the method includes:
  • Step 41 Determine the execution operation of performing cell reselection according to the service time determined based on the auxiliary information
  • the service time is the time when the NTN serving cell can provide services to the terminal;
  • the auxiliary information includes: coverage information, ephemeris information of the NTN serving cell, and/or reference service time information that the NTN serving cell can provide services.
  • the terminal may be, but is not limited to, a terminal such as a mobile phone, a wearable device, a vehicle-mounted terminal, a roadside unit (RSU, Road Side Unit), a smart home terminal, and an industrial sensing device.
  • a terminal such as a mobile phone, a wearable device, a vehicle-mounted terminal, a roadside unit (RSU, Road Side Unit), a smart home terminal, and an industrial sensing device.
  • a terminal such as a mobile phone, a wearable device, a vehicle-mounted terminal, a roadside unit (RSU, Road Side Unit), a smart home terminal, and an industrial sensing device.
  • RSU Road Side Unit
  • the NTN serving cell may be a cell of a satellite in the NTN.
  • the satellites may be flying base stations.
  • the base station may be an access device for the terminal to access the NTN.
  • the base stations may be various types of base stations.
  • a base station of a third generation mobile communication (3G) network For example, a base station of a third generation mobile communication (3G) network, a base station of a fourth generation mobile communication (4G) network, a base station of a fifth generation mobile communication (5G) network, or other evolved base stations.
  • 3G third generation mobile communication
  • 4G fourth generation mobile communication
  • 5G fifth generation mobile communication
  • the cells of the satellite follow the movement of the satellite.
  • the terminal remains stationary relative to the ground and the NTN serving cell moves along a fixed trajectory relative to the ground.
  • the terminal moves relative to the ground and the NTN serving cell moves along a fixed trajectory relative to the ground.
  • the terminal moves in the diameter direction of the cell.
  • the diametrical direction is the same as the direction of motion of the satellite.
  • the terminal and the satellite may move toward or in the same direction.
  • the NTN serving cell may be the NTN cell to which the terminal is currently connected. In this way, the terminal can perform wireless communication in the NTN serving cell.
  • the coverage of the NTN serving cell may be the range of the ground area that the signal of the NTN serving cell can cover.
  • the coverage information of the NTN serving cell may include information on the radius, diameter and/or area of the NTN serving cell.
  • the ephemeris information may be information associated with a satellite's position and/or motion state.
  • the parameter values of the information contained in the ephemeris information may be different.
  • the location information of the satellites may be different.
  • the location information may be location coordinates.
  • the ephemeris information includes at least one of the following information: satellite running track information, satellite position information, satellite movement speed information, and satellite running orbit altitude information.
  • the reference service time information that the NTN serving cell can provide the service may be information of the maximum duration that the NTN serving cell can provide the service.
  • the terminal is located in the diameter direction of the NTN serving cell, and the movement direction of the satellite is the same as the diameter direction, then the movement of the satellite makes the time required for the terminal to travel from one end of the diameter to the other end for the NTN serving cell to provide services maximum duration.
  • the two ends of the diameter may be the intersections of the straight line where the diameter is located and the boundary of the NTN serving cell.
  • the maximum value of the service time may be the maximum duration.
  • the NTN serving cell can only provide the terminal with the service for the first duration.
  • the first duration is the service time during which the NTN serving cell can provide services to the terminal.
  • the service time provided by the NTN serving cell to different terminals may also be different.
  • the reselection time for the terminal to perform cell reselection in each cell may be determined according to the moving speed of the satellite and the distance of the ground cell corresponding to the satellite.
  • the radial distance may be a diameter or a radius.
  • the reference service time information that the NTN serving cell can provide the service can be obtained according to the moving speed of the satellite and the coverage distance of the ground cell corresponding to the satellite.
  • the duration T indicated by the reference service time information that the NTN serving cell can provide the service is:
  • cell size can be the distance of the NTN serving cell; UE speed is the movement speed of the terminal; satellite speed is the movement speed of the satellite.
  • the orbital height of the satellite operation is 600km
  • the relationship between the diameter of the NTN serving cell, the movement speed of the terminal, the movement speed of the satellite and the reference service time information is shown in Table 2:
  • the terminal receives the assistance information sent by the base station.
  • the terminal may receive a system message or a Radio Resource Control (RRC, Radio Resource control) message that carries auxiliary information.
  • RRC Radio Resource Control
  • the assistance information includes reference service time information that the NTN serving cell can provide services.
  • the assistance information does not include reference service time information that the NTN serving cell can provide services.
  • the base station determines the reference service time information that the NTN serving cell can provide services based on the coverage information and ephemeris information of the NTN serving cell.
  • the assistance information includes coverage information and ephemeris information of the NTN serving cell, but the assistance information does not include reference service time information that the NTN serving cell can provide services.
  • the terminal determines the reference service time information that the NTN serving cell can provide the service based on the coverage information and ephemeris information of the NTN serving cell in the assistance information.
  • auxiliary information is preconfigured in the terminal.
  • the terminal may pre-configure part of the information about the running track information of the satellite, the position information of the satellite, the moving speed information of the satellite, the orbit altitude information of the satellite running, the distance of the NTN serving cell and the area of the NTN serving cell. information.
  • the distance information of the NTN serving cell is pre-configured in the terminal.
  • the auxiliary information required by the terminal may include pre-configured auxiliary information and received auxiliary information.
  • the auxiliary information is stored in a storage area of the terminal.
  • the auxiliary information is stored in a Universal Subscriber Identity Module (USIM, Universal Subscriber Identity Module) of the terminal.
  • USB Universal Subscriber Identity Module
  • the auxiliary information is stored in an embedded global subscriber identity card (eSIM, embedded-SIM).
  • eSIM embedded global subscriber identity card
  • the operation of cell reselection in response to the serving cell being able to provide services to the terminal within the service time, the operation of cell reselection may not be performed.
  • an operation of cell reselection in response to the serving cell no longer being able to serve the terminal outside the service time, an operation of cell reselection may be performed.
  • the terminal in response to the terminal needing to perform cell reselection and the network designates multiple candidate target cells for reselection, the terminal performs signal measurement of neighboring cells, and selects the R value according to the R criterion to determine the highest candidate target The cell is used as a target cell, and cell reselection is performed based on the target cell.
  • the terminal in response to the terminal needing to perform cell reselection and the network uniquely specifies a target cell for reselection, the terminal reselects the target cell through cell reselection.
  • the service time is different from the time indicated by the reference service time information that the NTN serving cell can provide the service.
  • the service time is less than or equal to the time duration indicated by the reference service time information that the NTN serving cell can provide the service.
  • the service time is determined according to the duration indicated by the reference service time information that the NTN serving cell can provide the service.
  • the duration of passing through the cell along the diameter d1 of the serving cell is the first duration T1. It should be noted that, here, the duration indicated by the reference service time information that the NTN serving cell can provide the service is T1.
  • the terminal is located at position B of the serving cell, and in the diameter direction of the serving cell (the diameter is d1), the distance between the position B and the edge of the NTN serving cell is the first distance d2 (corresponding to the figure in the figure).
  • the service time T2 can be determined according to the proportional relationship between the first distance and the diameter of the serving cell (d2/d1) and the duration T1 indicated by the reference service time information that the NTN serving cell can provide services.
  • T2 T1 ⁇ (d2/d1).
  • the service time is determined according to the assistance information in response to the terminal entering the serving cell.
  • the service time is determined according to the assistance information in response to the terminal switching from the connected state to the disconnected state in the serving cell.
  • the disconnected state includes: an RRC idle state and an RRC inactive state.
  • the execution operation of performing cell reselection is determined according to the service time determined based on the auxiliary information; wherein, the service time is the time when the NTN serving cell can provide services to the terminal; the auxiliary information includes: Coverage information, ephemeris information and/or reference service time information that the NTN serving cell can provide services.
  • the service time can be determined according to the auxiliary information, in the NTN network, the execution operation of performing cell reselection is determined according to the service time.
  • the influence of the near and far effect on the cell reselection in the NTN network is reduced, the execution operation of the cell reselection can be adapted to the auxiliary information, and the terminal can perform the cell reselection in a timely and reliable manner.
  • a method for cell reselection is provided in this embodiment, wherein, applied to a terminal, the method includes:
  • Step 51 In response to the service time being less than or equal to the time threshold, determine to perform cell reselection; or, in response to the service time being greater than the time threshold, determine not to perform cell reselection.
  • the time threshold is determined according to the required delay.
  • the time threshold is determined to be greater than the A value in response to the requested delay being less than the delay threshold.
  • the time threshold is determined to be less than the A value in response to the requested delay being greater than the delay threshold.
  • the time threshold can be adapted to the required delay.
  • the terminal in the serving cell can obtain the service time that the serving cell can provide when the terminal is at any position in the serving cell.
  • the assistance information sent by the base station through dedicated signaling is received.
  • the assistance information sent by the base station through RRC signaling is received.
  • this implementation is suitable for a scenario where the terminal switches from a connected state to a disconnected state.
  • the assistance information sent by the base station through the system message is received.
  • this implementation manner is applicable to the scenario in which the terminal reselects to enter the NTN serving cell.
  • a timer is started in response to the service time determination.
  • the duration of the timer is the service time.
  • cell reselection is performed in response to the timer expiring; cell reselection is not performed in response to the timer not expiring.
  • a method for cell reselection is provided in this embodiment, wherein, applied to a terminal, the method includes:
  • Step 61 Receive the message carrying the time threshold sent by the base station.
  • an RRC message carrying a time threshold sent by the base station is received.
  • this implementation is suitable for a scenario where the terminal switches from a connected state to a disconnected state.
  • the assistance information sent by the base station through the system message is received.
  • this implementation manner is applicable to the scenario in which the terminal reselects to enter the NTN serving cell.
  • a method for cell reselection is provided in this embodiment, wherein, applied to a terminal, the method includes:
  • Step 71 in response to the trigger condition being met, start the timing of the timer for triggering the reselection of the cell; wherein, the timing duration of the timer is determined according to the service time determined when the trigger condition is met;
  • Step 72 In response to the timer expiring, determine to perform cell reselection; or, in response to the timer not expiring, determine not to perform cell reselection.
  • the trigger condition may be that the terminal accesses the NTN serving cell through cell reselection.
  • the service time in response to the terminal entering the NTN serving cell through cell reselection, may be determined as the time period indicated by the reference service time information that the NTN serving cell can provide services.
  • the terminal initially enters the NTN serving cell through cell reselection
  • the movement speed of the terminal relative to the ground is 0;
  • the terminal is located on the diameter of the coverage of the NTN serving cell
  • the diameter of the terminal is in the same direction as the satellite's motion.
  • the trigger condition may be that the terminal switches from the connected state to the disconnected state in the NTN serving cell.
  • the disconnected state includes an RRC idle state and an RRC inactive state.
  • the service time determined when different trigger conditions are satisfied may be different.
  • the timing duration of the timer is less than or equal to the service time determined when the trigger condition is satisfied.
  • a method for cell reselection is provided in this embodiment, wherein, applied to a terminal, the method includes:
  • Step 81 in response to the terminal accessing the NTN serving cell through cell reselection, start the timing of the timer; or, in response to the terminal switching from the connected state to the non-connected state in the NTN serving cell, start the timing of the timer; wherein, the timing The timing duration of the server is less than or equal to the service time.
  • different service times are determined when different trigger conditions are satisfied.
  • the timing duration of the timer is less than or equal to the service time determined when the trigger condition is satisfied.
  • the disconnected state includes an RRC idle state or an RRC inactive state.
  • a method for cell reselection is provided in this embodiment, wherein, applied to a terminal, the method includes:
  • Step 91 Determine the service time according to the coverage information of the NTN serving cell, the current location information of the terminal, the ephemeris information of the NTN serving cell, and/or the reference service time information that the NTN serving cell can provide services.
  • the assistance information includes reference service time information that the NTN serving cell can provide services.
  • the base station determines the reference service time information that the NTN serving cell can provide services based on the coverage information and ephemeris information of the NTN serving cell.
  • the coverage information of the NTN serving cell includes the distance of the NTN serving cell.
  • the span includes diameter and/or radius.
  • the ephemeris information includes the speed of movement of the satellite and/or the orbital altitude of the movement of the satellite.
  • the reference service time information that the NTN serving cell can provide services can be obtained according to the moving speed of the satellite and the diameter of the NTN serving cell.
  • the duration T indicated by the reference service time information that the NTN serving cell can provide the service is:
  • cell size can be the diameter of the serving cell; UE speed is the movement speed of the terminal; satellite speed is the movement speed of the satellite.
  • the diameter of the NTN serving cell is R1
  • the distance it passes through the NTN serving cell is R2
  • m R2/R1.
  • the service duration X m ⁇ T.
  • T is the duration corresponding to the reference service time that the cell can provide the service.
  • T is not carried in the auxiliary information.
  • T may be determined by the terminal according to the coverage information and ephemeris information of the NTN serving cell.
  • the terminal reselects to enter the NTN serving cell, the position of entering the NTN serving cell is B, and the position of the reference point obtained by the terminal from the network is A, then the terminal determines the distance between the current and the reference point.
  • a method for cell reselection is provided in this embodiment, wherein, applied to a terminal, the method includes:
  • Step 121 Determine the reference service time information that the NTN serving cell can provide services according to the coverage information and ephemeris information of the NTN serving cell.
  • this embodiment provides a method for cell reselection, which is applied to a terminal, and the method includes:
  • Step 131 Determine the reference service time information that the NTN serving cell can provide services according to the span of the NTN serving cell, the speed of movement of the satellite and/or the orbital height of the satellite; where the span is a radius or a diameter.
  • the span of the NTN serving cell may be the diameter or radius of the NTN serving cell.
  • the coverage information of the NTN serving cell includes the diameter and/or radius of the NTN serving cell.
  • the ephemeris information includes the speed of movement of the satellite and the orbital altitude at which the satellite operates.
  • this embodiment provides a method for cell reselection, which is applied to a terminal, and the method includes:
  • Step 141 based on the current position of the terminal and the position of the reference point, determine the relative distance between the current position of the terminal and the edge of the NTN serving cell; wherein, the service time is the terminal according to the relative distance, the distance of the NTN serving cell and the NTN serving cell can be.
  • the timing of the timer for triggering the cell reselection is started; wherein, the timing duration of the timer is determined according to the service time determined when the trigger condition is satisfied.
  • in response to the timer expiring it is determined to perform cell reselection; or in response to the timer not expiring, it is determined not to perform cell reselection.
  • the service duration X m ⁇ T.
  • T is the duration corresponding to the reference service time that the cell can provide the service.
  • the auxiliary information carries T. T is determined by the network side according to the coverage information and ephemeris information of the NTN serving cell.
  • the location of the terminal is B
  • the location of the reference point obtained by the terminal from the network is A
  • the service time is equal to m multiplied by the reference service time information that the NTN serving cell can provide the service.
  • a method for cell reselection is provided in this embodiment, wherein, applied to a terminal, the method includes:
  • Step 151 Determine the position of the reference point according to the ephemeris information; or, determine the position of the reference point according to the position information of the reference point sent by the base station.
  • the location of the reference point may be the center of the NTN serving cell.
  • the reference point can be point A.
  • the coordinate information of the reference point may be obtained by calculation according to the parameter information contained in the ephemeris information.
  • a message sent by a satellite carrying coordinate information of a reference point may be received.
  • this embodiment provides a method for cell reselection, which is applied to a terminal, and the method includes:
  • Step 161 Receive the auxiliary information sent by the base station; or, determine the auxiliary information according to a predetermined configuration in the terminal.
  • the terminal receives the assistance information sent by the base station.
  • the terminal may receive a system message or a Radio Resource Control (RRC, Radio Resource control) message that carries auxiliary information.
  • RRC Radio Resource Control
  • the assistance information includes reference service time information that the NTN serving cell can provide services.
  • the base station determines the reference service time information that the NTN serving cell can provide services based on the coverage information and ephemeris information of the NTN serving cell.
  • the assistance information includes coverage information and ephemeris information of the NTN serving cell, but the assistance information does not include reference service time information that the NTN serving cell can provide services.
  • the terminal determines the reference service time information that the NTN serving cell can provide services based on the coverage information and ephemeris information of the NTN serving cell in the assistance information.
  • auxiliary information is preconfigured in the terminal.
  • the auxiliary information is stored in a storage area of the terminal.
  • the auxiliary information is stored in the terminal's USIM.
  • the auxiliary information is stored in the eSIM.
  • this embodiment provides a method for cell reselection, which is applied to a terminal, and the method includes:
  • Step 171 Receive a system message carrying auxiliary information sent by a base station; or, receive an RRC message carrying auxiliary information sent by a base station.
  • an RRC message carrying assistance information sent by the base station is received.
  • an RRC message carrying assistance information sent by the base station is received.
  • an embodiment of the present disclosure provides a method for cell reselection, wherein, applied to a base station, the method includes:
  • Step 181 Send auxiliary information to the terminal
  • the auxiliary information is used for the terminal to determine the service time that the NTN serving cell can provide services to the terminal; the auxiliary information includes: coverage information of the NTN serving cell, ephemeris information and/or reference time that the NTN serving cell can provide services information.
  • the terminal may be, but is not limited to, a terminal such as a mobile phone, a wearable device, a vehicle-mounted terminal, a roadside unit (RSU, Road Side Unit), a smart home terminal, and an industrial sensing device.
  • a terminal such as a mobile phone, a wearable device, a vehicle-mounted terminal, a roadside unit (RSU, Road Side Unit), a smart home terminal, and an industrial sensing device.
  • a terminal such as a mobile phone, a wearable device, a vehicle-mounted terminal, a roadside unit (RSU, Road Side Unit), a smart home terminal, and an industrial sensing device.
  • RSU Road Side Unit
  • the NTN serving cell may be a cell of a satellite in the NTN.
  • the satellites may be flying base stations.
  • the base station may be an access device for the terminal to access the NTN.
  • the base stations may be various types of base stations.
  • a base station of a third generation mobile communication (3G) network For example, a base station of a third generation mobile communication (3G) network, a base station of a fourth generation mobile communication (4G) network, a base station of a fifth generation mobile communication (5G) network, or other evolved base stations.
  • 3G third generation mobile communication
  • 4G fourth generation mobile communication
  • 5G fifth generation mobile communication
  • the cells of the satellite follow the movement of the satellite.
  • the terminal remains stationary relative to the ground and the NTN serving cell moves along a fixed trajectory relative to the ground.
  • the terminal moves relative to the ground and the NTN serving cell moves along a fixed trajectory relative to the ground.
  • the terminal moves in the diameter direction of the cell.
  • the diametrical direction is the same as the direction of motion of the satellite.
  • the terminal and satellite may be moving toward each other.
  • the terminal and the satellite may be moving in the same direction.
  • the NTN serving cell may be the NTN cell to which the terminal is currently connected. In this way, the terminal can perform wireless communication in the NTN serving cell.
  • the coverage of the NTN serving cell may be the range of the ground area that the signal of the NTN serving cell can cover.
  • the coverage information of the NTN serving cell may include information on the radius, diameter and/or area of the NTN serving cell.
  • the ephemeris information may be information associated with a satellite's position and/or motion state.
  • the parameter values of the information contained in the ephemeris information may be different.
  • the location information of the satellites may be different.
  • the ephemeris information includes at least one of the following information: satellite running track information, satellite position information, satellite movement speed information, and satellite running orbit altitude information.
  • the reference service time information that the NTN serving cell can provide the service may be information of the maximum duration that the NTN serving cell can provide the service.
  • the terminal is located in the diameter direction of the NTN serving cell, and the movement direction of the satellite is the same as the diameter direction, then the movement of the satellite makes the time required for the terminal to travel from one end of the diameter to the other end for the NTN serving cell to provide services maximum duration.
  • the two ends of the diameter may be the intersections of the straight line where the diameter is located and the boundary of the NTN serving cell.
  • the maximum value of the service time may be the maximum duration.
  • the NTN serving cell can only provide the terminal with the service for the first duration.
  • the first duration is the service time during which the NTN serving cell can provide services to the terminal.
  • the service time provided by the NTN serving cell to different terminals is also different.
  • the reselection time for the terminal to perform cell reselection in each cell may be determined according to the moving speed of the satellite and the distance of the ground cell corresponding to the satellite.
  • the radial distance may be a diameter or a radius.
  • the terminal after the terminal enters the cell for the duration indicated by the reference service time information through cell reselection, the terminal needs to perform cell reselection.
  • the reference service time information that the NTN serving cell can provide the service can be obtained according to the moving speed of the satellite and the coverage distance of the ground cell corresponding to the satellite.
  • the duration T indicated by the reference service time information that the NTN serving cell can provide the service is:
  • cell size can be the distance of the NTN serving cell; UE speed is the movement speed of the terminal; satellite speed is the movement speed of the satellite.
  • the orbital altitude of the satellite is 600km
  • the relationship between the diameter of the NTN serving cell, the movement speed of the terminal, the movement speed of the satellite and the reference service time information is shown in Table 2.
  • the base station sends assistance information to the terminal.
  • the base station sends a system message or an RRC message carrying auxiliary information to the terminal.
  • the assistance information includes reference service time information that the NTN serving cell can provide services.
  • the base station determines the reference service time information that the NTN serving cell can provide services based on the coverage information and ephemeris information of the NTN serving cell.
  • the assistance information includes coverage information and ephemeris information of the NTN serving cell, but the assistance information does not include reference service time information that the NTN serving cell can provide services.
  • the terminal determines the reference service time information that the NTN serving cell can provide the service based on the coverage information and ephemeris information of the NTN serving cell in the assistance information.
  • the operation of cell reselection in response to the serving cell being able to provide services to the terminal within the service time, the operation of cell reselection may not be performed.
  • an operation of cell reselection in response to the serving cell no longer being able to serve the terminal outside the service time, an operation of cell reselection may be performed.
  • the terminal in response to the terminal needing to perform cell reselection and the network designates multiple candidate target cells for reselection, the terminal performs signal measurement of neighboring cells, and selects the R value according to the R criterion to determine the highest candidate target The cell is used as a target cell, and cell reselection is performed based on the target cell.
  • the terminal in response to the terminal needing to perform cell reselection and the network uniquely specifies a target cell for reselection, the terminal reselects the target cell through cell reselection.
  • the service time is different from the time indicated by the reference service time information that the NTN serving cell can provide the service.
  • the service time is less than or equal to the time duration indicated by the reference service time information that the NTN serving cell can provide the service.
  • the service time is determined according to the time indicated by the reference service time information that the NTN serving cell can provide the service.
  • the duration of passing through the cell along the diameter d1 of the serving cell is the first duration T1. It should be noted that, here, the duration indicated by the reference service time information that the NTN serving cell can provide the service is T1.
  • the terminal is located at position B of the serving cell, and in the diameter direction of the serving cell (the diameter is d1), the distance between the position B and the edge of the NTN serving cell is the first distance d2 (corresponding to the figure in the figure).
  • the service time T2 can be determined according to the proportional relationship between the first distance and the diameter of the serving cell (d2/d1) and the duration T1 indicated by the reference service time information that the NTN serving cell can provide services.
  • T2 T1 ⁇ (d2/d1).
  • the terminal determines the service time according to the assistance information in response to the terminal entering the serving cell.
  • the terminal determines the service time according to the assistance information in response to the terminal switching from the connected state to the disconnected state in the serving cell.
  • the disconnected state includes: an RRC idle state and an RRC inactive state.
  • the execution operation of performing cell reselection is determined according to the service time determined based on the auxiliary information; wherein, the service time is the time when the NTN serving cell can provide services to the terminal; the auxiliary information includes: Coverage information, ephemeris information and/or reference service time information that the NTN serving cell can provide services.
  • the service time can be determined according to the auxiliary information, in the NTN network, the execution operation of performing cell reselection is determined according to the service time.
  • the influence of the near and far effect on the cell reselection in the NTN network is reduced, the execution operation of the cell reselection can be adapted to the auxiliary information, and the terminal can perform the cell reselection in a timely and reliable manner.
  • an embodiment of the present disclosure provides a method for cell reselection, wherein, applied to a base station, the method includes:
  • Step 191 Send a system message carrying auxiliary information to the terminal; or, send a radio resource control RRC message carrying auxiliary information to the terminal.
  • the base station sends the auxiliary information to the terminal through RRC signaling.
  • this implementation is suitable for a scenario where the terminal switches from a connected state to a disconnected state.
  • the base station sends the assistance information to the terminal through a system message.
  • this implementation manner is applicable to the scenario in which the terminal reselects to enter the NTN serving cell.
  • an embodiment of the present disclosure provides a method for cell reselection, wherein, applied to a base station, the method includes:
  • Step 201 sending the location information of the reference point to the terminal;
  • the location information of the reference point indicates the location of the reference point used to determine the service time.
  • the timing of the timer for triggering the cell reselection is started; wherein, the timing duration of the timer is determined according to the service time determined when the trigger condition is satisfied.
  • in response to the timer expiring it is determined to perform cell reselection; or in response to the timer not expiring, it is determined not to perform cell reselection.
  • the service duration X m ⁇ T.
  • T is the duration corresponding to the reference service time that the cell can provide the service.
  • the auxiliary information carries T. T is determined by the network side according to the coverage information and ephemeris information of the NTN serving cell.
  • the location of the terminal is B
  • the location of the reference point obtained by the terminal from the network is A
  • the service time is m multiplied by the reference service time information that the NTN serving cell can provide.
  • an embodiment of the present disclosure provides a method for cell reselection, wherein, applied to a base station, the method includes:
  • Step 21 Send a message carrying a time threshold to the terminal; wherein, the time threshold is used for the terminal to perform an operation of cell reselection.
  • the time threshold is determined according to the required delay.
  • the time threshold is determined to be greater than the A value in response to the requested delay being less than the delay threshold.
  • the time threshold is determined to be less than the A value in response to the requested delay being greater than the delay threshold.
  • the time threshold can be adapted to the required delay.
  • a timer is started in response to the service time determination.
  • the duration of the timer is the service time.
  • cell reselection is performed in response to the timer expiring; cell reselection is not performed in response to the timer not expiring.
  • Example 1 See Figure 10 again.
  • the terminal is in a stationary state relative to the ground, and the signals of cell 1, cell 2 and cell 3 of the moving satellites in the NTN network cover the terminal in turn.
  • Step a1 the terminal is in NTN cell 1 and enters NTN cell 2 through cell reselection.
  • the terminal enters cell 2 through cell reselection, the position where the terminal performs cell reselection is B, and the terminal is at position B in FIG. 10 .
  • Step b1 the terminal reads the system message broadcast by the NTN serving cell, and obtains auxiliary information from the system message. And determine the service time that the NTN serving cell can provide services for the terminal through the auxiliary information;
  • the auxiliary information includes: coverage information of the NTN serving cell (for example, diameter L) and service reference time T.
  • step c1 the terminal also obtains the location information of the reference point from the network, that is, the location information of point A in FIG. 10 .
  • Step d1 the terminal acquires the location information of the terminal, that is, the location information of point B in the above-mentioned FIG. 10 .
  • Step e1 the terminal determines, according to the above information, that the distance from the terminal moving (relative movement) to point D (cell edge) is x1.
  • Step g1 the terminal determines T1 through the above steps immediately after entering the cell 2, and starts a timer, and the timer duration is T1.
  • step h1 in response to the timer expiring, the terminal immediately measures neighboring cells, and reselects the cell with the highest R value, that is, cell 3, by sorting the R values in the R rule.
  • the moving speed of the terminal relative to the ground is h km/h, and the signals of cell 1, cell 2 and cell 3 of the moving satellites in the NTN network cover the terminal in turn.
  • a method for cell reselection disclosed in Example 2, comprising:
  • Step a2 the terminal receives the auxiliary information sent by the cell 2 through the RRC message.
  • the auxiliary information does not include: the service reference time T, and the auxiliary information includes: coverage information (eg, diameter L) of the NTN serving cell, and moving speed q (km/s) of satellite operation.
  • coverage information eg, diameter L
  • moving speed q km/s
  • step b2 the service reference time T is determined based on the coverage information of the NTN serving cell, the orbital height of the satellite operation and the movement speed of the satellite operation:
  • L is the diameter of the NTN cell
  • h is the ground velocity of the terminal
  • q is the moving velocity of the satellite.
  • Step c2 when the terminal is located at the B position in the cell 2, the terminal switches from the RRC connected state to the RRC disconnected state, and at this time, the UE calculates the service duration T1 that the NTN serving cell can provide for it.
  • Step d2 the terminal obtains the time threshold K configured by the network in the RRC release message in the process of switching from the RRC connected state to the RRC disconnected state;
  • step e2 the terminal also obtains the location information of the reference point from the network, that is, the location information of point A in FIG. 11 .
  • Step f2 the terminal acquires the location information of the terminal, that is, the location information of point B in FIG. 11 .
  • Step g2 the terminal determines, according to the above information, that the distance from the terminal moving (relative movement) to point D (cell edge) is x2.
  • Step i2 In response to the service time T1 that the serving cell can provide is less than or equal to the time threshold K, the terminal immediately measures the neighboring cells, and reselects the cell with the highest R value by sorting the R value, that is, reselecting to cell 3.
  • an embodiment of the present disclosure provides an apparatus for cell reselection, which is applied to a terminal, and the apparatus includes a determination module 221; wherein,
  • the determining module 221 is configured to: determine the execution operation of performing cell reselection according to the service time determined based on the assistance information;
  • the service time is the time when the non-terrestrial network NTN serving cell can provide services to the terminal;
  • the auxiliary information includes: coverage information of the NTN serving cell, ephemeris information and/or reference service time information that the NTN serving cell can provide services .
  • the determining module 221 is further configured to:
  • the apparatus further includes a first receiving module 222; wherein the first receiving module 222,
  • the apparatus further includes a start module 223; the start module 223 is configured to: in response to the trigger condition being satisfied, start the timing of the timer for triggering the reselection of the cell; wherein, the timing duration of the timer is based on The service time determined when the trigger condition is satisfied;
  • the determining module 221 is further configured to:
  • the startup module 223 is further configured to:
  • the timing of the timer is started; wherein, the timing duration of the timer is less than or equal to the service time.
  • the determining module 221 is further configured to:
  • the service time is determined according to the coverage information of the NTN serving cell, the current location of the terminal, the ephemeris information of the NTN serving cell, and/or the reference service time information that the NTN serving cell can provide services.
  • the determining module 221 in response to the assistance information not including reference time information that the NTN serving cell can provide services, is further configured to:
  • the reference service time information that the NTN serving cell can provide services is determined.
  • the determining module 221 is further configured to:
  • the reference service time information that the NTN serving cell can provide services is determined according to the distance of the NTN serving cell, the moving speed of the satellite and/or the orbital height of the satellite.
  • the distance is a radius or a diameter.
  • the apparatus further includes an obtaining module 224; wherein, the obtaining module 224 is configured to obtain the current position of the terminal and the position of the reference point;
  • the determining module 221 is configured to: determine the relative distance between the current location of the terminal and the edge of the NTN serving cell based on the information about the current location of the terminal and the location of the reference point; The distance and the time determined by the reference service time information that the NTN serving cell can provide the service.
  • the determining module 221 is further configured to:
  • the location of the reference point is determined according to the location information of the reference point sent by the base station.
  • the apparatus further includes a second receiving module 225; wherein,
  • the second receiving module 225 is configured to receive the auxiliary information sent by the base station
  • the determining module is further configured to determine auxiliary information according to a predetermined configuration in the terminal.
  • the second receiving module 225 is further configured to:
  • Radio resource control RRC message that carries auxiliary information and is sent by the base station.
  • an embodiment of the present disclosure provides an apparatus for cell reselection, which is applied to a base station, and the apparatus includes a sending module 231; wherein,
  • the sending module 231 is configured to send auxiliary information to the terminal;
  • the auxiliary information is used for the terminal to determine the service time that the NTN serving cell can provide services to the terminal; the auxiliary information includes: coverage information of the NTN serving cell, ephemeris information and/or reference time that the NTN serving cell can provide services information.
  • the sending module 231 is further configured to:
  • a radio resource control RRC message carrying auxiliary information is sent to the terminal.
  • the sending module 231 is further configured to:
  • the location information of the reference point indicates the location of the reference point used to determine the service time.
  • the sending module 231 is further configured to:
  • a message carrying a time threshold is sent to the terminal; wherein, the time threshold is used for the terminal to perform an operation of cell reselection.
  • Embodiments of the present disclosure provide a communication device, the communication device includes:
  • memory for storing processor-executable instructions
  • the processor is configured to, when executing the executable instructions, implement the method applied to any embodiment of the present disclosure.
  • the processor may include various types of storage media, which are non-transitory computer storage media that can continue to memorize and store information on the communication device after the power is turned off.
  • the processor can be connected to the memory through a bus or the like, and is used to read the executable program stored on the memory.
  • An embodiment of the present disclosure further provides a computer storage medium, wherein the computer storage medium stores a computer-executable program, and when the executable program is executed by a processor, the method of any embodiment of the present disclosure is implemented.
  • this embodiment provides a terminal 800, which may be a mobile phone, a computer, a digital broadcasting terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc. .
  • the terminal 800 may include one or more of the following components: a processing component 802, a memory 804, a power supply component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and communication component 816.
  • the processing component 802 generally controls the overall operations of the terminal 800, such as operations associated with display, phone calls, data communications, camera operations, and recording operations.
  • the processing component 802 can include one or more processors 820 to execute instructions to perform all or some of the steps of the methods described above.
  • processing component 802 may include one or more modules that facilitate interaction between processing component 802 and other components.
  • processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802.
  • Memory 804 is configured to store various types of data to support operation at device 800 . Examples of such data include instructions for any application or method operating on the terminal 800, contact data, phonebook data, messages, pictures, videos, and the like. Memory 804 may be implemented by any type of volatile or nonvolatile storage device or combination thereof, such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Magnetic or Optical Disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read only memory
  • EPROM erasable Programmable Read Only Memory
  • PROM Programmable Read Only Memory
  • ROM Read Only Memory
  • Magnetic Memory Flash Memory
  • Magnetic or Optical Disk Magnetic Disk
  • Power supply assembly 806 provides power to various components of terminal 800 .
  • Power supply components 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to terminal 800 .
  • Multimedia component 808 includes screens that provide an output interface between terminal 800 and the user.
  • the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user.
  • the touch panel includes one or more touch sensors to sense touch, swipe, and gestures on the touch panel. A touch sensor can sense not only the boundaries of a touch or swipe action, but also the duration and pressure associated with the touch or swipe action.
  • the multimedia component 808 includes a front-facing camera and/or a rear-facing camera. When the device 800 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each of the front and rear cameras can be a fixed optical lens system or have focal length and optical zoom capability.
  • Audio component 810 is configured to output and/or input audio signals.
  • the audio component 810 includes a microphone (MIC) that is configured to receive external audio signals when the terminal 800 is in an operating mode, such as a calling mode, a recording mode, and a voice recognition mode.
  • the received audio signal may be further stored in memory 804 or transmitted via communication component 816 .
  • audio component 810 also includes a speaker for outputting audio signals.
  • the I/O interface 812 provides an interface between the processing component 802 and a peripheral interface module, which may be a keyboard, a click wheel, a button, or the like. These buttons may include, but are not limited to: home button, volume buttons, start button, and lock button.
  • Sensor assembly 814 includes one or more sensors for providing various aspects of the status assessment of terminal 800 .
  • the sensor component 814 can detect the open/closed state of the device 800, the relative positioning of components, such as the display and keypad of the terminal 800, the sensor component 814 can also detect the position change of the terminal 800 or a component of the terminal 800, the user The presence or absence of contact with the terminal 800, the orientation or acceleration/deceleration of the terminal 800 and the temperature change of the terminal 800.
  • Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact.
  • Sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications.
  • the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
  • Communication component 816 is configured to facilitate wired or wireless communication between terminal 800 and other devices.
  • Terminal 800 may access a wireless network based on a communication standard, such as Wi-Fi, 2G or 3G, or a combination thereof.
  • the communication component 816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel.
  • the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication.
  • NFC near field communication
  • the NFC module may be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.
  • RFID radio frequency identification
  • IrDA infrared data association
  • UWB ultra-wideband
  • Bluetooth Bluetooth
  • terminal 800 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable A gate array (FPGA), controller, microcontroller, microprocessor or other electronic component implementation is used to perform the above method.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGA field programmable A gate array
  • controller microcontroller, microprocessor or other electronic component implementation is used to perform the above method.
  • non-transitory computer-readable storage medium including instructions, such as a memory 804 including instructions, which are executable by the processor 820 of the terminal 800 to perform the above method.
  • the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.
  • an embodiment of the present disclosure shows a structure of a base station.
  • the base station 900 may be provided as a network-side device.
  • base station 900 includes processing component 922, which further includes one or more processors, and a memory resource represented by memory 932 for storing instructions executable by processing component 922, such as application programs.
  • An application program stored in memory 932 may include one or more modules, each corresponding to a set of instructions.
  • the processing component 922 is configured to execute instructions to perform any of the aforementioned methods applied to the base station.
  • the base station 900 may also include a power supply assembly 926 configured to perform power management of the base station 900, a wired or wireless network interface 950 configured to connect the base station 900 to a network, and an input output (I/O) interface 958.
  • Base station 900 may operate based on an operating system stored in memory 932, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM or the like.

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Abstract

本公开实施例提供了一种小区重选的方法，其中，应用于终端，方法，包括：根据基于辅助信息确定的服务时间，确定执行小区重选的执行操作；其中，服务时间，为非地面网络NTN服务小区能够给终端提供服务的时间；辅助信息，包括：NTN服务小区的覆盖范围信息、星历信息和/或NTN服务小区能够提供服务的参考服务时间信息。

Description

小区重选的方法、装置、通信设备及存储介质 技术领域
本公开涉及无线通信技术领域但不限于无线通信技术领域，尤其涉及一种小区重选的方法、装置、通信设备及存储介质。
背景技术
在第五代移动通信技术新空口(NR，New Radio)中，对于地面网络(TN，Terrestrial Networks)，终端可以根据S准则和R准则进行小区选择和重选，例如，终端可以通过比较测量到的参考信号接收功率(RSRP，Reference Signal Receiving Power)与小区中心的RSRP之间的明显差异来确定终端是否处于小区边缘，从而进行邻区测量和小区重选。但是对于非地面网络(NTN，Non-Terrestrial Networks)，当卫星的移动或终端的移动使得终端需要进行小区重选时，由于RSRP没有明显的远近效益，可能会导致终端的小区重选过晚或者终端会在不同小区之间来回重选。
发明内容
本公开实施例公开了一种小区重选的方法、装置、通信设备及存储介质。
根据本公开实施例的第一方面，提供一种小区重选的方法，其中，应用于终端，所述方法，包括：
根据基于辅助信息确定的服务时间，确定执行小区重选的执行操作；
其中，所述服务时间，为非地面网络NTN服务小区能够给所述终端提供服务的时间；所述辅助信息，包括：所述NTN服务小区的覆盖范围信息、星历信息和/或所述NTN服务小区能够提供服务的参考服务时间信息。
根据本公开实施例的第二方面，提供一种小区重选的方法，其中，应用于基站，所述方法，包括：
向终端发送辅助信息；
其中，所述辅助信息，用于供所述终端确定NTN服务小区能够给所述终端提供服务的服务时间；所述辅助信息，包括：所述NTN服务小区的覆盖范围信息、星历信息和/或所述NTN服务小区能够提供服务的参考时间信息。
根据本公开实施例的第三方面，提供一种小区重选的装置，其中，应用于终端，所述装置，包括确定模块；其中，
所述确定模块，被配置为：根据基于辅助信息确定的服务时间，确定执行小区重选的执行操作；
其中，所述服务时间，为非地面网络NTN服务小区能够给所述终端提供服务的时间；所述辅助信息，包括：所述NTN服务小区的覆盖范围信息、星历信息和/或所述NTN服务小区能够提供服务的参考服务时间信息。
根据本公开实施例的第四方面，提供一种小区重选的装置，其中，应用于基站，所述装置，包括发 送模块；其中，
所述发送模块，被配置为向终端发送辅助信息；
其中，所述辅助信息，用于供所述终端确定NTN服务小区能够给所述终端提供服务的服务时间；所述辅助信息，包括：所述NTN服务小区的覆盖范围信息、星历信息和/或所述NTN服务小区能够提供服务的参考时间信息。
根据本公开实施例的第五方面，提供一种通信设备，所述通信设备，包括：
处理器；
用于存储所述处理器可执行指令的存储器；
其中，所述处理器被配置为：用于运行所述可执行指令时，实现本公开任意实施例所述的方法。
根据本公开实施例的第六方面，提供一种计算机存储介质，所述计算机存储介质存储有计算机可执行程序，所述可执行程序被处理器执行时实现本公开任意实施例所述的方法。
本公开实施例中，根据基于辅助信息确定的服务时间，确定执行小区重选的执行操作；其中，所述服务时间，为NTN服务小区能够给所述终端提供服务的时间；所述辅助信息，包括：所述NTN服务小区的覆盖范围信息、星历信息和/或所述NTN服务小区能够提供服务的参考服务时间信息。这里，由于可以根据所述辅助信息确定所述服务时间，在NTN网络中，根据所述服务时间确定执行小区重选的执行操作，相较于采用利用信号质量的测量结果确定执行小区重选的执行操作的方式，减小了NTN网络中远近效应不明显对小区重选的影响，小区重选的执行操作能够与所述辅助信息相适应，终端能够及时可靠地进行小区重选。
附图说明
图1是一种无线通信系统的结构示意图。
图2是根据一示例性实施例示出的一种无线通信的方法的示意图。
图3是根据一示例性实施例示出的一种无线通信的方法的示意图。
图4是根据一示例性实施例示出的一种小区重选的方法的流程示意图。
图5是根据一示例性实施例示出的一种小区重选的方法的流程示意图。
图6是根据一示例性实施例示出的一种小区重选的方法的流程示意图。
图7是根据一示例性实施例示出的一种小区重选的方法的流程示意图。
图8是根据一示例性实施例示出的一种小区重选的方法的流程示意图。
图9是根据一示例性实施例示出的一种小区重选的方法的流程示意图。
图10是根据一示例性实施例示出的一种确定服务时间的方法的示意图。
图11是根据一示例性实施例示出的一种确定服务时间的方法的示意图。
图12是根据一示例性实施例示出的一种小区重选的方法的流程示意图。
图13是根据一示例性实施例示出的一种小区重选的方法的流程示意图。
图14是根据一示例性实施例示出的一种小区重选的方法的流程示意图。
图15是根据一示例性实施例示出的一种小区重选的方法的流程示意图。
图16是根据一示例性实施例示出的一种小区重选的方法的流程示意图。
图17是根据一示例性实施例示出的一种小区重选的方法的流程示意图。
图18是根据一示例性实施例示出的一种小区重选的方法的流程示意图。
图19是根据一示例性实施例示出的一种小区重选的方法的流程示意图。
图20是根据一示例性实施例示出的一种小区重选的方法的流程示意图。
图21是根据一示例性实施例示出的一种小区重选的方法的流程示意图。
图22是根据一示例性实施例示出的一种小区重选的装置的示意图。
图23是根据一示例性实施例示出的一种小区重选的装置的示意图。
图24是根据一示例性实施例示出的一种终端的结构示意图。
图25是根据一示例性实施例示出的一种基站的框图。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本公开实施例相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本公开实施例的一些方面相一致的装置和方法的例子。
在本公开实施例使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本公开实施例。在本公开实施例和所附权利要求书中所使用的单数形式的“一种”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。还应当理解，本文中使用的术语“和/或”是指并包含一个或多个相关联的列出项目的任何或所有可能组合。
应当理解，尽管在本公开实施例可能采用术语第一、第二、第三等来描述各种信息，但这些信息不应限于这些术语。这些术语仅用来将同一类型的信息彼此区分开。例如，在不脱离本公开实施例范围的情况下，第一信息也可以被称为第二信息，类似地，第二信息也可以被称为第一信息。取决于语境，如在此所使用的词语“如果”可以被解释成为“在……时”或“当……时”或“响应于确定”。
出于简洁和便于理解的目的，本文在表征大小关系时，所使用的术语为“大于”或“小于”。但对于本领域技术人员来说，可以理解：术语“大于”也涵盖了“大于等于”的含义，“小于”也涵盖了“小于等于”的含义。
请参考图1，其示出了本公开实施例提供的一种无线通信系统的结构示意图。如图1所示，无线通信系统是基于移动通信技术的通信系统，该无线通信系统可以包括：若干个用户设备110以及若干个基站120。
其中，用户设备110可以是指向用户提供语音和/或数据连通性的设备。用户设备110可以经无线接入网(Radio Access Network，RAN)与一个或多个核心网进行通信，用户设备110可以是物联网用户设备，如传感器设备、移动电话(或称为“蜂窝”电话)和具有物联网用户设备的计算机，例如，可以是固定式、便携式、袖珍式、手持式、计算机内置的或者车载的装置。例如，站(Station，STA)、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、移动台(mobile)、远 程站(remote station)、接入点、远程用户设备(remote terminal)、接入用户设备(access terminal)、用户装置(user terminal)、用户代理(user agent)、用户设备(user device)、或用户设备(user equipment)。或者，用户设备110也可以是无人飞行器的设备。或者，用户设备110也可以是车载设备，比如，可以是具有无线通信功能的行车电脑，或者是外接行车电脑的无线用户设备。或者，用户设备110也可以是路边设备，比如，可以是具有无线通信功能的路灯、信号灯或者其它路边设备等。
基站120可以是无线通信系统中的网络侧设备。其中，该无线通信系统可以是第四代移动通信技术(the 4th generation mobile communication，4G)系统，又称长期演进(Long Term Evolution，LTE)系统；或者，该无线通信系统也可以是5G系统，又称新空口系统或5G NR系统。或者，该无线通信系统也可以是5G系统的再下一代系统。其中，5G系统中的接入网可以称为NG-RAN(New Generation-Radio Access Network，新一代无线接入网)。
其中，基站120可以是4G系统中采用的演进型基站(eNB)。或者，基站120也可以是5G系统中采用集中分布式架构的基站(gNB)。当基站120采用集中分布式架构时，通常包括集中单元(central unit，CU)和至少两个分布单元(distributed unit，DU)。集中单元中设置有分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)层、无线链路层控制协议(Radio Link Control，RLC)层、媒体访问控制(Media Access Control，MAC)层的协议栈；分布单元中设置有物理(Physical，PHY)层协议栈，本公开实施例对基站120的具体实现方式不加以限定。
基站120和用户设备110之间可以通过无线空口建立无线连接。在不同的实施方式中，该无线空口是基于第四代移动通信网络技术(4G)标准的无线空口；或者，该无线空口是基于第五代移动通信网络技术(5G)标准的无线空口，比如该无线空口是新空口；或者，该无线空口也可以是基于5G的更下一代移动通信网络技术标准的无线空口。
在一些实施例中，用户设备110之间还可以建立E2E(End to End，端到端)连接。比如车联网通信(vehicle to everything，V2X)中的V2V(vehicle to vehicle，车对车)通信、V2I(vehicle to Infrastructure，车对路边设备)通信和V2P(vehicle to pedestrian，车对人)通信等场景。
这里，上述用户设备可认为是下面实施例的终端设备。
在一些实施例中，上述无线通信系统还可以包含网络管理设备130。
若干个基站120分别与网络管理设备130相连。其中，网络管理设备130可以是无线通信系统中的核心网设备，比如，该网络管理设备130可以是演进的数据分组核心网(Evolved Packet Core，EPC)中的移动性管理实体(Mobility Management Entity，MME)。或者，该网络管理设备也可以是其它的核心网设备，比如服务网关(Serving GateWay，SGW)、公用数据网网关(Public Data Network GateWay，PGW)、策略与计费规则功能单元(Policy and Charging Rules Function，PCRF)或者归属签约用户服务器(Home Subscriber Server，HSS)等。对于网络管理设备130的实现形态，本公开实施例不做限定。
为了更好地理解本公开任一个实施例所描述的技术方案，首先，通过一个实施例对一种无线通信的场景进行说明。
在5G系统中，引入了NTN。
请参见图2和图3，为不同无线通信场景下的终端接收信号的接收信号强度的远近效应示意图。
其中，图2为TN无线通信场景下终端接收信号的接收信号强度的示意图。该TN包括陆地网络基站和终端。图3为NTN无线通信场景下终端接收信号的接收信号强度的示意图。该NTN包括非陆地网络基站和终端。
在一个实施例中，在TN系统中，终端可以根据小区中心与小区边缘之间的RSRP的明显差异来确定终端是否处于小区边缘。
在一个实施例中，在TN系统中，终端可以根据小区中心与小区边缘之间的参考信号接收质量(RSRQ，Reference Signal Receiving Quality)的明显差异来确定终端是否处于小区边缘。
但在NTN中，小区半径大，终端在小区中心或者小区边缘，终端测量到的RSRP和RSRQ差异较小，远近效应并不明显。并且小区半径大导致小区重叠面积较大，容易出现“乒乓”切换的情况。这里，“乒乓”切换为在不同小区之间进行来回小区重选。
在5G NR中，终端根据S准则和R准则进行小区选择或重选。
其中，S准则为：
Srxlev>0和Squal>0；
其中，Srxlev为小区选择接收值；
Squal为小区选择质量值。
终端进行小区选择或者重选需要满足S准则。
并且，对于终端的同频的测量，响应于服务小区满足：
Srxlev>SintraSearchP和Squal>SintraSearchQ；
则终端可以选择不对同频领小区进行测量。
其中SIntraSearchP用于启动同频测量的RSRP信号电平门限值；
SIntraSearchQ用于启动同频测量的RSRQ信号质量门限值。
响应于上述条件不满足，则终端开始进行邻小区测量，然后根据R准则选择出目标小区，完成小区重选。
其中，R准则为：
Rs＝Qmeas.s+Qhyst-Qoffset temp；
Rn＝Qmeas.n-Qoffset-Qoffset temp；
其中，Rs为服务小区的R值；
Rn为相邻小区的R值；
Qmeas.s为服务小区的RSRP测量值；
Qmeas.n为相邻小区的RSRP测量值；
Qhyst为小区重选滞后值；
Qoffset temp为临时偏移值；
Qoffset为偏移值。
具体参数描述如表一：
表一
Figure PCTCN2020139604-appb-000001
对于NTN，由于远近效应不明显。仅基于RSRP和/或RSRQ进行小区重选可能会导致终端在两个小区之间来回重选，是不可靠的，且会出现小区重选不及时的情况。
如图4所示，本实施例中提供一种小区重选的方法，其中，应用于终端，该方法，包括：
步骤41、根据基于辅助信息确定的服务时间，确定执行小区重选的执行操作；
其中，服务时间，为NTN服务小区能够给终端提供服务的时间；辅助信息，包括：NTN服务小区的覆盖范围信息、星历信息和/或NTN服务小区能够提供服务的参考服务时间信息。
在一些实施例中，终端可以是但不限于是手机、可穿戴设备、车载终端、路侧单元(RSU，Road Side Unit)、智能家居终端和工业用传感设备等终端。
这里，NTN服务小区可以是NTN中卫星的小区。
在一个实施例中，卫星可以是飞行的基站。
在一个实施例中，基站可以是终端接入NTN的接入设备。
在一些实施例中，基站可以为各种类型的基站。
例如，第三代移动通信(3G)网络的基站、第四代移动通信(4G)网络的基站、第五代移动通信(5G)网络的基站或其它演进型基站。
在一个实施例中，卫星的小区跟随卫星运动。
在一个实施例中，终端与NTN服务小区之间具有相对速度。
在一个实施例中，终端相对地面保持静止且NTN服务小区相对地面沿着固定轨迹运动。
在一个实施例中，终端相对地面运动且NTN服务小区相对地面沿着固定轨迹运动。
在一个实施例中，终端在小区的直径方向上运动。
在一个实施例中，直径方向与卫星的运动方向相同。
在一个实施例中，终端与卫星可以是相向或者同向运动。
在一个实施例中，NTN服务小区可以是终端当前连接的NTN小区。如此，终端可以在该NTN服务小区中进行无线通信。
在一个实施例中，NTN服务小区的覆盖范围可以是NTN服务小区的信号能够覆盖到的地面区域的范围。
在一个实施例中，NTN服务小区的覆盖范围信息，可以包括：NTN服务小区的半径、直径和/或面积的信息。
在一个实施例中，星历信息可以是跟卫星的位置和/或运动状态相关联的信息。
在一个实施例中，在不同的时刻，星历信息包含的信息的参数值可以不同。
例如，在不同的时刻，卫星的位置信息可以不同。这里，位置信息可以是位置坐标。
在一个实施例中，星历信息，包括以下信息中的至少一种：卫星的运行轨迹信息、卫星的位置信息、卫星的运动速度信息和卫星运行的轨道高度信息。
在一个实施例中，NTN服务小区能够提供服务的参考服务时间信息，可以是NTN服务小区能够提供服务的最大时长的信息。
在一个实施例中，终端位于NTN服务小区的直径方向上，且卫星的运动方向与该直径方向相同，则卫星运动使得终端从直径的一端到另一端所需的时间为NTN服务小区能够提供服务的最大时长。这里，直径的两端，可以是直径所在的直线与NTN服务小区的边界的交点。
在一个实施例中，服务时间的最大取值可以为该最大时长。
在一个实施例中，由于卫星的移动，因此，NTN服务小区只能够给终端提供第一时长的服务。这里，第一时长即为NTN服务小区能够给终端提供服务的服务时间。而且，由于终端所在NTN服务小区的位置不同，NTN服务小区给不同终端提供的服务时间也可能不同。
在一个实施例中，可以根据卫星的运动速度以及卫星对应的地面小区的径距，确定终端在每个小区执行小区重选的重选时间。这里，径距可以是直径或者半径。
在一个实施例中，可以根据卫星的运动速度以及卫星对应的地面小区的覆盖径距获得NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，NTN服务小区能够提供服务的参考服务时间信息指示的时长T为：
Figure PCTCN2020139604-appb-000002
这里，cell size可以是NTN服务小区的径距；UE speed为终端的运动速度；satellite speed为卫星的运动速度。
在一个实施例中，卫星运行的轨道高度为600km，NTN服务小区的直径、终端的运动速度、卫星的运动速度和参考服务时间信息的关系如表二：
表二
Figure PCTCN2020139604-appb-000003
Figure PCTCN2020139604-appb-000004
在一个实施例中，终端接收基站发送的辅助信息。
在一个实施例中，终端可以接收携带辅助信息的系统消息或者无线资源控制(RRC，Radio Resource control)消息。
在一个实施例中，辅助信息包括NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，辅助信息不包括NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，响应于辅助信息不包括NTN服务小区能够提供服务的参考服务时间信息，基站基于NTN服务小区的覆盖范围信息和星历信息确定NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，辅助信息包括NTN服务小区的覆盖范围信息和星历信息，但是辅助信息不包括NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，终端基于辅助信息中的NTN服务小区的覆盖范围信息和星历信息确定NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，终端中预先配置有辅助信息。
在一个实施例中，终端可以预先配置卫星的运行轨迹信息、卫星的位置信息、卫星的运动速度信息和卫星运行的轨道高度信息、NTN服务小区的径距和NTN服务小区面积的信息中的部分信息。
例如，终端中预先配置了NTN服务小区的径距信息。
在一个实施例中，终端需要的辅助信息，可以包括预先配置的辅助信息和接收到的辅助信息。
在一个实施例中，辅助信息存储在终端的存储区域中。
在一个实施例中，辅助信息存储在终端的全球用户识别卡(USIM，Universal Subscriber Identity Module)中。
在一个实施例中，辅助信息存储在嵌入式全球用户识别卡(eSIM，embedded-SIM)中。
在一个实施例中，响应于在服务时间内，服务小区能够给终端提供服务，可以不执行小区重选的操作。
在一个实施例中，响应于在服务时间外，服务小区不能够再给终端提供服务，可以执行小区重选的操作。
在一个实施例中，响应于终端需要执行小区重选且网络指定重选的多个备选目标小区，则终端执行对邻小区信号的测量，根据R准则选择R值确定出最高的备选目标小区作为目标小区，基于该目标小区执行小区重选。
在一个实施例中，响应于终端需要执行小区重选且网络唯一指定重选的目标小区，则终端通过小区重选，重选到该目标小区。
在一个实施例中，服务时间不同于NTN服务小区能够提供服务的参考服务时间信息指示的时间。
在一个实施例中，服务时间小于或者等于NTN服务小区能够提供服务的参考服务时间信息指示的时长。
在一个实施例中，根据NTN服务小区能够提供服务的参考服务时间信息指示的时长确定服务时间。
在一个实施例中，终端通过小区重选后进入服务小区后，沿服务小区的直径d1穿过小区的时长为第一时长T1。需要说明的是，这里，NTN服务小区能够提供服务的参考服务时间信息指示的时长为T1。
在一个实施例中，请参见图10，终端位于服务小区的B位置，在服务小区的直径方向上(直径为d1)，B位置与NTN服务小区边缘的距离为第一距离d2(对应图中的BD)，则可以根据第一距离与服务小区的直径的比例关系(d2/d1)，以及NTN服务小区能够提供服务的参考服务时间信息指示的时长T1，确定服务时间T2。其中，
T2＝T1×(d2/d1)。
在一个实施例中，响应于终端进入服务小区，根据辅助信息确定服务时间。
在一个实施例中，响应于终端在服务小区中终端从连接态切换至非连接态，根据辅助信息确定服务时间。
在一个实施例中，非连接态，包括：RRC空闲态和RRC非激活态。
本公开实施例中，根据基于辅助信息确定的服务时间，确定执行小区重选的执行操作；其中，服务时间，为NTN服务小区能够给终端提供服务的时间；辅助信息，包括：NTN服务小区的覆盖范围信息、星历信息和/或NTN服务小区能够提供服务的参考服务时间信息。这里，由于可以根据辅助信息确定服务时间，在NTN网络中，根据服务时间确定执行小区重选的执行操作，相较于采用利用信号质量的测量结果确定执行小区重选的执行操作的方式，减小了NTN网络中远近效应不明显对小区重选的影响，执行小区重选的执行操作能够与辅助信息相适应，终端能够及时可靠地进行小区重选。
需要说明的是，本领域内技术人员可以理解，本公开实施例提供的方法，可以被单独执行，也可以与本公开实施例中一些方法或相关技术中的一些方法一起被执行。
如图5所示，本实施例中提供一种小区重选的方法，其中，应用于终端，该方法，包括：
步骤51、响应于服务时间小于或者等于时间阈值，确定执行小区重选；或者，响应于服务时间大于时间阈值，确定不执行小区重选。
在一个实施例中，根据要求的时延确定时间阈值。
在一个实施例中，响应于要求的时延小于时延阈值，确定时间阈值大于A值。
在一个实施例中，响应于要求的时延大于时延阈值，确定时间阈值小于A值。
如此，时间阈值可以适应于要求的时延。
在一个实施例中，处于服务小区内的终端可以获得终端在服务小区内任意位置时服务小区能够提供的服务时间。
在一个实施例中，接收基站通过专有信令发送的辅助信息。
在一个实施例中，接收基站通过RRC信令发送的辅助信息。
这里，该实现方式适应于终端从连接态切换为非连接态的场景。
在一个实施例中，接收基站通过系统消息发送的辅助信息。
这里，该实现方式适用于终端重选进入NTN服务小区的场景。
在一个实施例中，响应于服务时间确定，启动定时器。这里，定时器的时长为该服务时间。
在一个实施例中，响应于定时器超时，执行小区重选；响应于定时器未超时，不执行小区重选。
需要说明的是，本领域内技术人员可以理解，本公开实施例提供的方法，可以被单独执行，也可以与本公开实施例中一些方法或相关技术中的一些方法一起被执行。
如图6所示，本实施例中提供一种小区重选的方法，其中，应用于终端，该方法，包括：
步骤61、接收基站下发的携带时间阈值的消息。
在一个实施例中，接收基站发送的携带时间阈值的RRC消息。
这里，该实现方式适应于终端从连接态切换为非连接态的场景。
在一个实施例中，接收基站通过系统消息发送的辅助信息。
这里，该实现方式适用于终端重选进入NTN服务小区的场景。
需要说明的是，本领域内技术人员可以理解，本公开实施例提供的方法，可以被单独执行，也可以与本公开实施例中一些方法或相关技术中的一些方法一起被执行。
如图7所示，本实施例中提供一种小区重选的方法，其中，应用于终端，该方法，包括：
步骤71、响应于触发条件满足，启动用于触发重选小区的定时器的定时；其中，定时器的定时时长为根据在触发条件满足时确定的服务时间确定的；
步骤72、响应于定时器超时，确定执行小区重选；或者，响应于定时器未超时，确定不执行小区重选。
在一个实施例中，触发条件可以是终端通过小区重选接入NTN服务小区。
在一个实施例中，响应于终端通过小区重选进入NTN服务小区，可以将服务时间确定为NTN服务小区能够提供服务的参考服务时间信息指示的时长。
这里，需要说明的是，在一个实施例中，上述方式的实现需要满足如下条件：
终端通过小区重选初始进入NTN服务小区；
终端的相对地面的运动速度为0；
终端位于NTN服务小区的覆盖范围的直径上；
终端所在直径的方向与卫星的运动方向相同。
在一个实施例中，触发条件可以是终端在NTN服务小区中从连接态切换至非连接态。这里，非连接态包括RRC空闲态和RRC非激活态。
在一个实施例中，不同的触发条件满足时确定的服务时间可以不同。
在一个实施例中，定时器的定时时长小于或者等于在触发条件满足时确定的服务时间。
需要说明的是，本领域内技术人员可以理解，本公开实施例提供的方法，可以被单独执行，也可以与本公开实施例中一些方法或相关技术中的一些方法一起被执行。
如图8所示，本实施例中提供一种小区重选的方法，其中，应用于终端，该方法，包括：
步骤81、响应于终端通过小区重选接入NTN服务小区，启动定时器的定时；或者，响应于终端在NTN服务小区中从连接态切换至非连接态，启动定时器的定时；其中，定时器的定时时长小于或等于服务时间。
在一个实施例中，不同的触发条件满足时确定的服务时间不同。
在一个实施例中，定时器的定时时长小于或者等于在触发条件满足时确定的服务时间。
在一个实施例中，非连接态包括RRC空闲态或者RRC非激活态。
需要说明的是，本领域内技术人员可以理解，本公开实施例提供的方法，可以被单独执行，也可以与本公开实施例中一些方法或相关技术中的一些方法一起被执行。
如图9所示，本实施例中提供一种小区重选的方法，其中，应用于终端，该方法，包括：
步骤91、根据NTN服务小区的覆盖范围信息、终端当前所在位置的信息、NTN服务小区的星历信息和/或NTN服务小区能够提供服务的参考服务时间信息，确定服务时间。
在一个实施例中，辅助信息包括NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，响应于辅助信息不包括NTN服务小区能够提供服务的参考服务时间信息，基站基于NTN服务小区的覆盖范围信息和星历信息确定NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，NTN服务小区的覆盖范围信息包括NTN服务小区的径距。这里，径距包括直径和/或半径。
在一个实施例中，星历信息包括卫星的运动速度和/或卫星运动的轨道高度。
在一个实施例中，响应于终端辅助信息不包括NTN服务小区能够提供服务的参考服务时间信息，可以根据卫星的运动速度以及NTN服务小区的直径获得NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，NTN服务小区能够提供服务的参考服务时间信息指示的时长T为：
Figure PCTCN2020139604-appb-000005
这里，cell size可以是服务小区的直径；UE speed为终端的运动速度；satellite speed为卫星的运动速度。
在一个实施例中，NTN服务小区的直径为R1，则终端进入NTN服务小区后，其经过NTN服务小区的距离为R2，且m＝R2/R1。
在一个实施例中，服务时长X＝m×T。这里，T为小区能够提供服务的参考服务时间对应的时长。辅助信息中未携带有T。这里，T可以是终端根据NTN服务小区的覆盖范围信息和星历信息确定的。
在一个实施例中，请参见图10，终端重选进入NTN服务小区，进入NTN服务小区的位置为B，终端从网络获取的参考点的位置为A，则终端确定当前与参考点之间的距离为L(即，AB的距离)，确定与参考点连线与水平方向(AC方向)的夹角为α，即∠BAC＝α，则m＝2×L×cosα/R1。
在一个实施例中，请参见图11，终端在NTN服务小区内从连接态进入空闲态或者非激活态，即终端在B位置进入空闲态或非激活态，终端从网络获取的参考点位置为B，则终端确定终端与参考点之间的距离为L(AB的距离),终端确定终端与参考点的连线与水平方向(AC方向)的夹角为α，即∠BAC＝α，则AE的距离为L*sinα，则ED的距离为：sqrt((R1/2) 2-(L×sinα) 2)。
在一个实施例中，如果α小于或等于π/2，则m＝(L×cosα+sqrt((R1/2) 2-(L×sinα) 2))/R1。
在一个实施例中，如果α大于π/2，则m＝(sqrt((R1/2) 2-(L×sinα) 2)-L×sin(π/2-α))/R1。
这里，需要说明的是：
Figure PCTCN2020139604-appb-000006
需要说明的是，本领域内技术人员可以理解，本公开实施例提供的方法，可以被单独执行，也可以与本公开实施例中一些方法或相关技术中的一些方法一起被执行。
如图12所示，本实施例中提供一种小区重选的方法，其中，应用于终端，该方法，包括：
步骤121、根据NTN服务小区的覆盖范围信息和星历信息，确定NTN服务小区能够提供服务的参考服务时间信息。
需要说明的是，本领域内技术人员可以理解，本公开实施例提供的方法，可以被单独执行，也可以与本公开实施例中一些方法或相关技术中的一些方法一起被执行。
如图13所示，本实施例中提供一种小区重选的方法，其中，应用于终端，该方法，包括：
步骤131、根据NTN服务小区的径距、卫星的运动速度和/或卫星运行的轨道高度，确定NTN服务小区能够提供服务的参考服务时间信息；其中，所述径距，为半径或者直径。
在一个实施例中，NTN服务小区的径距可以是NTN服务小区的直径或者半径。
在一个实施例中，NTN服务小区的覆盖范围信息包括NTN服务小区的直径和/或半径。
在一个实施例中，星历信息包括卫星的运动速度和卫星运行的轨道高度。
需要说明的是，本领域内技术人员可以理解，本公开实施例提供的方法，可以被单独执行，也可以与本公开实施例中一些方法或相关技术中的一些方法一起被执行。
如图14所示，本实施例中提供一种小区重选的方法，其中，应用于终端，该方法，包括：
步骤141、基于终端当前所在位置和参考点的位置，确定终端当前所在位置与NTN服务小区边缘的相对距离；其中，服务时间，为终端根据相对距离、NTN服务小区的径距和NTN服务小区能够提供服务的参考服务时间信息确定的时间。
在一个实施例中，启动用于触发重选小区的定时器的定时；其中，定时器的定时时长为根据在触发条件满足时确定的服务时间确定的。
在一个实施例中，响应于定时器超时，确定执行小区重选；或者，响应于定时器未超时，确定不执行小区重选。
在一个实施例中，服务时长X＝m×T。这里，T为小区能够提供服务的参考服务时间对应的时长。辅助信息中携带有T。T为网络侧根据NTN服务小区的覆盖范围信息和星历信息确定的。
在一个实施例中，请再次参见图10，终端所处位置为B，终端从网络获取的参考点的位置为A，则终端确定当前与参考点之间的相对距离为L(即，AB的距离)，确定与参考点连线与水平方向(AC方向)的夹角为α，即∠BAC＝α，则m＝2×L×cosα/R1。则服务时间等于m乘以NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，请再次参见图11，终端所处位置为B，终端从网络获取的参考点位置为B，则终端确定终端与参考点之间的相对距离为L(AB的距离),终端确定终端与参考点的连线与水平方向(AC方向)的夹角为α，即∠BAC＝α，则AE的距离为L×sinα，则ED的距离为：sqrt((R1/2) 2-(L×sinα) 2)。则服务时间等于m乘以NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，如果α小于或等于π/2,则m＝(L×cosα+sqrt((R1/2) 2-(L×sinα) 2))/R1。
在一个实施例中，如果α大于π/2,则m＝(sqrt((R1/2) 2-(L×sinα) 2)-L×sin(π/2-α))/R1。
这里，需要说明的是：
Figure PCTCN2020139604-appb-000007
需要说明的是，本领域内技术人员可以理解，本公开实施例提供的方法，可以被单独执行，也可以与本公开实施例中一些方法或相关技术中的一些方法一起被执行。
如图15所示，本实施例中提供一种小区重选的方法，其中，应用于终端，该方法，包括：
步骤151、根据星历信息确定参考点的位置；或者，根据基站发送的参考点的位置信息确定参考点的位置。
在一个实施例中，参考点的位置可以是NTN服务小区的中心。请参见图10，参考点可以是A点。
在一个实施例中，参考点的坐标信息可以是根据星历信息中包含的参数信息计算获得的。
在一个实施例中，可以接收卫星发送的携带参考点的坐标信息的消息。
需要说明的是，本领域内技术人员可以理解，本公开实施例提供的方法，可以被单独执行，也可以与本公开实施例中一些方法或相关技术中的一些方法一起被执行。
如图16所示，本实施例中提供一种小区重选的方法，其中，应用于终端，该方法，包括：
步骤161、接收基站发送的辅助信息；或者，根据终端中的预定配置确定辅助信息。
在一个实施例中，终端接收基站发送的辅助信息。
在一个实施例中，终端可以接收携带辅助信息的系统消息或者无线资源控制(RRC，Radio Resource control)消息。
在一个实施例中，辅助信息包括NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，响应于辅助信息不包括NTN服务小区能够提供服务的参考服务时间信息，基站基于NTN服务小区的覆盖范围信息和星历信息确定NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，辅助信息包括NTN服务小区的覆盖范围信息和星历信息，但是辅助信息不包括NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，终端基于辅助信息中的NTN服务小区的覆盖范围信息和星历信息确定NTN服 务小区能够提供服务的参考服务时间信息。
在一个实施例中，终端中预先配置有辅助信息。
在一个实施例中，辅助信息存储在终端的存储区域中。
在一个实施例中，辅助信息存储在终端的USIM中。
在一个实施例中，辅助信息存储在eSIM中。
需要说明的是，本领域内技术人员可以理解，本公开实施例提供的方法，可以被单独执行，也可以与本公开实施例中一些方法或相关技术中的一些方法一起被执行。
如图17所示，本实施例中提供一种小区重选的方法，其中，应用于终端，该方法，包括：
步骤171、接收基站发送的携带辅助信息的系统消息；或者，接收基站发送的携带辅助信息的RRC消息。
在一个实施例中，响应于终端与基站建立RRC连接，接收基站发送的携带辅助信息的RRC消息。
在一个实施例中，响应于终端进入NTN服务小区，接收基站发送的携带辅助信息的RRC消息。
需要说明的是，本领域内技术人员可以理解，本公开实施例提供的方法，可以被单独执行，也可以与本公开实施例中一些方法或相关技术中的一些方法一起被执行。
如图18所示，本公开实施例中提供一种小区重选的方法，其中，应用于基站，方法，包括：
步骤181、向终端发送辅助信息；
其中，辅助信息，用于供终端确定NTN服务小区能够给终端提供服务的服务时间；辅助信息，包括：NTN服务小区的覆盖范围信息、星历信息和/或NTN服务小区能够提供服务的参考时间信息。
在一些实施例中，终端可以是但不限于是手机、可穿戴设备、车载终端、路侧单元(RSU，Road Side Unit)、智能家居终端和工业用传感设备等终端。
这里，NTN服务小区可以是NTN中卫星的小区。
在一个实施例中，卫星可以是飞行的基站。
在一个实施例中，基站可以是终端接入NTN的接入设备。
在一些实施例中，基站可以为各种类型的基站。
例如，第三代移动通信(3G)网络的基站、第四代移动通信(4G)网络的基站、第五代移动通信(5G)网络的基站或其它演进型基站。
在一个实施例中，卫星的小区跟随卫星运动。
在一个实施例中，终端与NTN服务小区之间具有相对速度。
在一个实施例中，终端相对地面保持静止且NTN服务小区相对地面沿着固定轨迹运动。
在一个实施例中，终端相对地面运动且NTN服务小区相对地面沿着固定轨迹运动。
在一个实施例中，终端在小区的直径方向上运动。
在一个实施例中，直径方向与卫星的运动方向相同。
在一个实施例中，终端与卫星可以是相向运动。
在一个实施例中，终端与卫星可以是同向运动。
在一个实施例中，NTN服务小区可以是终端当前连接的NTN小区。如此，终端可以在该NTN服务小区中进行无线通信。
在一个实施例中，NTN服务小区的覆盖范围可以是NTN服务小区的信号能够覆盖到的地面区域的范围。
在一个实施例中，NTN服务小区的覆盖范围信息，可以包括：NTN服务小区的半径、直径和/或面积的信息。
在一个实施例中，星历信息可以是跟卫星的位置和/或运动状态相关联的信息。
在一个实施例中，在不同的时刻，星历信息包含的信息的参数值可以不同。
例如，在不同的时刻，卫星的位置信息可以不同。
在一个实施例中，星历信息，包括以下信息中的至少一种：卫星的运行轨迹信息、卫星的位置信息、卫星的运动速度信息和卫星运行的轨道高度信息。
在一个实施例中，NTN服务小区能够提供服务的参考服务时间信息，可以是NTN服务小区能够提供服务的最大时长的信息。
在一个实施例中，终端位于NTN服务小区的直径方向上，且卫星的运动方向与该直径方向相同，则卫星运动使得终端从直径的一端到另一端所需的时间为NTN服务小区能够提供服务的最大时长。这里，直径的两端，可以是直径所在的直线与NTN服务小区的边界的交点。
在一个实施例中，服务时间的最大取值可以为该最大时长。
在一个实施例中，由于卫星的移动，因此，NTN服务小区只能够给终端提供第一时长的服务。这里，第一时长即为NTN服务小区能够给终端提供服务的服务时间。而且，由于终端所在NTN服务小区的位置不同，NTN服务小区给不同终端提供的服务时间也不同。
在一个实施例中，可以根据卫星的运动速度以及卫星对应的地面小区的径距，确定终端在每个小区执行小区重选的重选时间。这里，径距可以是直径或者半径。
在一个实施例中，在终端通过小区重选进入小区该参考服务时间信息指示的时长后，终端需要执行小区重选。
在一个实施例中，可以根据卫星的运动速度以及卫星对应的地面小区的覆盖径距获得NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，NTN服务小区能够提供服务的参考服务时间信息指示的时长T为：
Figure PCTCN2020139604-appb-000008
这里，cell size可以是NTN服务小区的径距；UE speed为终端的运动速度；satellite speed为卫星的运动速度。
在一个实施例中，卫星运行的轨道高度为600km，NTN服务小区的直径、终端的运动速度、卫星的运动速度和参考服务时间信息的关系如表二。
在一个实施例中，基站向终端发送辅助信息。
在一个实施例中，基站向终端发送携带辅助信息的系统消息或者RRC消息。
在一个实施例中，辅助信息包括NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，响应于辅助信息不包括NTN服务小区能够提供服务的参考服务时间信息，基站基于NTN服务小区的覆盖范围信息和星历信息确定NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，辅助信息包括NTN服务小区的覆盖范围信息和星历信息，但是辅助信息不包括NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，终端基于辅助信息中的NTN服务小区的覆盖范围信息和星历信息确定NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，响应于在服务时间内，服务小区能够给终端提供服务，可以不执行小区重选的操作。
在一个实施例中，响应于在服务时间外，服务小区不能够再给终端提供服务，可以执行小区重选的操作。
在一个实施例中，响应于终端需要执行小区重选且网络指定重选的多个备选目标小区，则终端执行对邻小区信号的测量，根据R准则选择R值确定出最高的备选目标小区作为目标小区，基于该目标小区执行小区重选。
在一个实施例中，响应于终端需要执行小区重选且网络唯一指定重选的目标小区，则终端通过小区重选，重选到该目标小区。
在一个实施例中，服务时间不同于NTN服务小区能够提供服务的参考服务时间信息指示的时间。
在一个实施例中，服务时间小于或者等于NTN服务小区能够提供服务的参考服务时间信息指示的时长。
在一个实施例中，根据NTN服务小区能够提供服务的参考服务时间信息指示的时间确定服务时间。
在一个实施例中，终端通过小区重选进入服务小区后，沿服务小区的直径d1穿过小区的时长为第一时长T1。需要说明的是，这里，NTN服务小区能够提供服务的参考服务时间信息指示的时长为T1。
在一个实施例中，请参见图10，终端位于服务小区的B位置，在服务小区的直径方向上(直径为d1)，B位置与NTN服务小区边缘的距离为第一距离d2(对应图中的BD)，则可以根据第一距离与服务小区的直径的比例关系(d2/d1)，以及NTN服务小区能够提供服务的参考服务时间信息指示的时长T1，确定服务时间T2。其中，
T2＝T1×(d2/d1)。
在一个实施例中，终端响应于终端进入服务小区，根据辅助信息确定服务时间。
在一个实施例中，终端响应于终端在服务小区中终端从连接态切换至非连接态，根据辅助信息确定服务时间。
在一个实施例中，非连接态，包括：RRC空闲态和RRC非激活态。
本公开实施例中，根据基于辅助信息确定的服务时间，确定执行小区重选的执行操作；其中，服务时间，为NTN服务小区能够给终端提供服务的时间；辅助信息，包括：NTN服务小区的覆盖范围信息、星历信息和/或NTN服务小区能够提供服务的参考服务时间信息。这里，由于可以根据辅助信息确定服 务时间，在NTN网络中，根据服务时间确定执行小区重选的执行操作，相较于采用利用信号质量的测量结果确定执行小区重选的执行操作的方式，减小了NTN网络中远近效应不明显对小区重选的影响，执行小区重选的执行操作能够与辅助信息相适应，终端能够及时可靠地进行小区重选。
需要说明的是，本领域内技术人员可以理解，本公开实施例提供的方法，可以被单独执行，也可以与本公开实施例中一些方法或相关技术中的一些方法一起被执行。
如图19所示，本公开实施例中提供一种小区重选的方法，其中，应用于基站，方法，包括：
步骤191、向终端发送携带辅助信息的系统消息；或者，向终端发送携带辅助信息的无线资源控制RRC消息。
在一个实施例中，基站通过RRC信令向终端发送辅助信息。
这里，该实现方式适应于终端从连接态切换为非连接态的场景。
在一个实施例中，基站通过系统消息向终端发送辅助信息。
这里，该实现方式适用于终端重选进入NTN服务小区的场景。
需要说明的是，本领域内技术人员可以理解，本公开实施例提供的方法，可以被单独执行，也可以与本公开实施例中一些方法或相关技术中的一些方法一起被执行。
如图20所示，本公开实施例中提供一种小区重选的方法，其中，应用于基站，方法，包括：
步骤201、向终端发送参考点的位置信息；
其中，参考点的位置信息指示用于确定服务时间的参考点的位置。
在一个实施例中，启动用于触发重选小区的定时器的定时；其中，定时器的定时时长为根据在触发条件满足时确定的服务时间确定的。
在一个实施例中，响应于定时器超时，确定执行小区重选；或者，响应于定时器未超时，确定不执行小区重选。
在一个实施例中，服务时长X＝m×T。这里，T为小区能够提供服务的参考服务时间对应的时长。辅助信息中携带有T。T为网络侧根据NTN服务小区的覆盖范围信息和星历信息确定的。
在一个实施例中，请再次参见图10，终端所处位置为B，终端从网络获取的参考点的位置为A，则终端确定当前与参考点之间的相对距离为L(即，AB的距离),确定与参考点连线与水平方向(AC方向)的夹角为α，即∠BAC＝α，则m＝2*L*cosα/R1。则服务时间为m乘以NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，请再次参见图11，终端所处位置为B，终端从网络获取的参考点位置为B，则终端确定终端与参考点之间的相对距离为L(AB的距离),终端确定终端与参考点的连线与水平方向(AC方向)的夹角为α，即∠BAC＝α，则AE的距离为L*sinα，则ED的距离为：sqrt((R1/2) 2-(L×sinα) 2)则服务时间为m乘以NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，如果α小于或等于π/2，则m＝(L×cosα+sqrt((R1/2) 2-(L×sinα) 2))/R1。
在一个实施例中，如果α大于π/2，则m＝(sqrt((R1/2) 2-(L×sinα) 2)-L×sin(π/2-α))/R1。
这里，需要说明的是：
Figure PCTCN2020139604-appb-000009
需要说明的是，本领域内技术人员可以理解，本公开实施例提供的方法，可以被单独执行，也可以与本公开实施例中一些方法或相关技术中的一些方法一起被执行。
如图21所示，本公开实施例中提供一种小区重选的方法，其中，应用于基站，方法，包括：
步骤21、向终端发送携带时间阈值的消息；其中，时间阈值用于供终端执行小区重选的执行操作。
在一个实施例中，根据要求的时延确定时间阈值。
在一个实施例中，响应于要求的时延小于时延阈值，确定时间阈值大于A值。
在一个实施例中，响应于要求的时延大于时延阈值，确定时间阈值小于A值。
如此，时间阈值可以适应于要求的时延。
在一个实施例中，响应于服务时间确定，启动定时器。这里，定时器的时长为该服务时间。
在一个实施例中，响应于定时器超时，执行小区重选；响应于定时器未超时，不执行小区重选。
需要说明的是，本领域内技术人员可以理解，本公开实施例提供的方法，可以被单独执行，也可以与本公开实施例中一些方法或相关技术中的一些方法一起被执行。
为了方便对本公开实施例的理解，以下通过示例性实施例对本公开技术方案进行说明：
示例1：请再次参见图10。
终端处于相对地面的静止状态，NTN网络中运动的卫星的小区1、小区2和小区3的信号依次覆盖终端。
示例1公开的一种小区重选的方法，包括：
步骤a1、终端在NTN小区1中，通过小区重选进入NTN小区2。
例如，终端通过小区重选进入小区2，终端进行小区重选的位置为B，终端处于图10中的B位置。
步骤b1、终端读取NTN服务小区广播的系统消息，从该系统消息中获取辅助信息。并通过辅助信息确定NTN服务小区能够为终端提供服务的服务时间；
其中，辅助信息，包括：NTN服务小区的覆盖信息(例如，直径L)和服务参考时间T。
步骤c1、终端还从网络获取参考点的位置信息，即图10中A点的位置信息。
步骤d1、终端获取终端的位置信息，即上述图10中B点的位置信息。
步骤e1、终端根据上述信息确定终端移动(相对移动)到D点(小区边缘)的距离为x1。
步骤f1、终端根据上述信息确定服务小区能够为其提供的服务时间T1＝x1/L*T。
步骤g1、终端在进去小区2后立刻通过上述步骤确定T1，并启动定时器，定时器时长为T1。
步骤h1、响应于定时器超时，终端立即对邻小区进行测量，通过对R规则中的R值排序，重选到R值最高的小区，即重选到小区3。
示例2，请再次参见图11。
终端相对地面的移动速度为h km/h，NTN网络中运动的卫星的小区1、小区2和小区3的信号依 次覆盖终端。示例2公开的一种小区重选的方法，包括：
步骤a2、终端接收小区2通过RRC消息发送的辅助信息。
其中，辅助信息不包括：服务参考时间T，且辅助信息包括：NTN服务小区的覆盖信息(例如，直径L)、卫星运行的运动速度q(km/s)。
步骤b2、基于NTN服务小区的覆盖信息、卫星运行的轨道高度和卫星运行的运动速度确定服务参考时间T：
Figure PCTCN2020139604-appb-000010
这里，L是NTN小区的直径；h是终端的对地速度；q为卫星的运动速度。
步骤c2、当终端位于小区2中的B位置，终端从RRC连接态切换至RRC非连接态，此时UE计算NTN服务小区能够为其提供的服务时长T1。
步骤d2、终端从RRC连接态切换至RRC非连接态过程中的RRC release消息中获取网络配置的时间阈值K；
步骤e2、终端还从网络获取参考点的位置信息，即图11中A点的位置信息。
步骤f2、终端获取终端的位置信息，即图11中B点的位置信息。
步骤g2、终端根据上述信息确定终端移动(相对移动)到D点(小区边缘)的距离为x2。
步骤h2、终端根据上述信息确定服务小区能够为其提供的服务时间T1＝x2/L*T。
步骤i2、响应于服务小区能够提供的服务时间T1小于或者等于时间阈值K，终端立即对邻小区进行测量，通过R值排序，重选到R值最高的小区，即重选到小区3。
如图22所示，本公开实施例中提供一种小区重选的装置，其中，应用于终端，装置，包括确定模块221；其中，
确定模块221，被配置为：根据基于辅助信息确定的服务时间，确定执行小区重选的执行操作；
其中，服务时间，为非地面网络NTN服务小区能够给终端提供服务的时间；辅助信息，包括：NTN服务小区的覆盖范围信息、星历信息和/或NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，确定模块221，还被配置为：
响应于服务时间小于或者等于时间阈值，确定执行小区重选；
或者，
响应于服务时间大于时间阈值，确定不执行小区重选。
在一个实施例中，装置，还包括第一接收模块222；其中，第一接收模块222，
被配置为：接收基站下发的携带时间阈值的消息。
在一个实施例中，装置，还包括启动模块223；启动模块223，被配置为：响应于触发条件满足，启动用于触发重选小区的定时器的定时；其中，定时器的定时时长为根据在触发条件满足时确定的服务时间确定的；
确定模块221，还被配置为：
响应于定时器超时，确定执行小区重选；
或者，
响应于定时器未超时，确定不执行小区重选。
在一个实施例中，启动模块223，还被配置为：
响应于终端通过小区重选接入NTN服务小区，启动定时器的定时；
或者，
响应于终端在NTN服务小区中从连接态切换至非连接态，启动定时器的定时；其中，定时器的定时时长小于或等于服务时间。
在一个实施例中，确定模块221，还被配置为：
根据NTN服务小区的覆盖范围信息、终端当前所在位置、NTN服务小区的星历信息和/或NTN服务小区能够提供服务的参考服务时间信息，确定服务时间。
在一个实施例中，响应于辅助信息不包括NTN服务小区能够提供服务的参考时间信息；确定模块221，还被配置为：
根据NTN服务小区的覆盖范围信息和星历信息，确定NTN服务小区能够提供服务的参考服务时间信息。
在一个实施例中，确定模块221，还被配置为：
根据NTN服务小区的径距、卫星的运动速度和/或卫星运行的轨道高度，确定NTN服务小区能够提供服务的参考服务时间信息；其中，径距，为半径或者直径。
在一个实施例中，装置，还包括获取模块224；其中，获取模块224，被配置为获取终端当前所在位置和参考点的位置；
确定模块221，被配置为：基于终端当前所在位置和参考点的位置的信息，确定终端当前所在位置与NTN服务小区边缘的相对距离；其中，服务时间，为终端根据相对距离、NTN服务小区的径距和NTN服务小区能够提供服务的参考服务时间信息确定的时间。
在一个实施例中，确定模块221；还被配置为：
根据星历信息确定参考点的位置；
或者，
根据基站发送的参考点的位置信息确定参考点的位置。
在一个实施例中，装置，还包括第二接收模块225；其中，
第二接收模块225，被配置为接收基站发送的辅助信息；
或者，
确定模块，还被配置为根据终端中的预定配置确定辅助信息。
在一个实施例中，第二接收模块225，还被配置为：
接收基站发送的携带辅助信息的系统消息；
或者，
接收基站发送的携带辅助信息的无线资源控制RRC消息。
如图23所示，本公开实施例中提供一种小区重选的装置，其中，应用于基站，装置，包括发送模块231；其中，
发送模块231，被配置为向终端发送辅助信息；
其中，辅助信息，用于供终端确定NTN服务小区能够给终端提供服务的服务时间；辅助信息，包括：NTN服务小区的覆盖范围信息、星历信息和/或NTN服务小区能够提供服务的参考时间信息。
在一个实施例中，发送模块231，还被配置为：
向终端发送携带辅助信息的系统消息；
或者，
向终端发送携带辅助信息的无线资源控制RRC消息。
在一个实施例中，发送模块231，还被配置为：
向终端发送参考点的位置信息；
其中，参考点的位置信息，指示用于确定服务时间的参考点的位置。
在一个实施例中，发送模块231，还被配置为：
向终端发送携带时间阈值的消息；其中，时间阈值用于供终端执行小区重选的执行操作。
需要说明的是，本领域内技术人员可以理解，本公开实施例提供的方法，可以被单独执行，也可以与本公开实施例中一些方法或相关技术中的一些方法一起被执行。
关于上述实施例中的装置，其中各个模块执行操作的具体方式已经在有关该方法的实施例中进行了详细描述，此处将不做详细阐述说明。
本公开实施例提供一种通信设备，通信设备，包括：
处理器；
用于存储处理器可执行指令的存储器；
其中，处理器被配置为：用于运行可执行指令时，实现应用于本公开任意实施例的方法。
其中，处理器可包括各种类型的存储介质，该存储介质为非临时性计算机存储介质，在通信设备掉电之后能够继续记忆存储其上的信息。
处理器可以通过总线等与存储器连接，用于读取存储器上存储的可执行程序。
本公开实施例还提供一种计算机存储介质，其中，计算机存储介质存储有计算机可执行程序，可执行程序被处理器执行时实现本公开任意实施例的方法。
关于上述实施例中的装置，其中各个模块执行操作的具体方式已经在有关该方法的实施例中进行了详细描述，此处将不做详细阐述说明。
如图24所示，本公开一个实施例提供一种终端的结构。
参照图24所示终端800本实施例提供一种终端800，该终端具体可是移动电话，计算机，数字广 播终端，消息收发设备，游戏控制台，平板设备，医疗设备，健身设备，个人数字助理等。
参照图24，终端800可以包括以下一个或多个组件：处理组件802，存储器804，电源组件806，多媒体组件808，音频组件810，输入/输出(I/O)的接口812，传感器组件814，以及通信组件816。
处理组件802通常控制终端800的整体操作，诸如与显示，电话呼叫，数据通信，相机操作和记录操作相关联的操作。处理组件802可以包括一个或多个处理器820来执行指令，以完成上述的方法的全部或部分步骤。此外，处理组件802可以包括一个或多个模块，便于处理组件802和其他组件之间的交互。例如，处理组件802可以包括多媒体模块，以方便多媒体组件808和处理组件802之间的交互。
存储器804被配置为存储各种类型的数据以支持在设备800的操作。这些数据的示例包括用于在终端800上操作的任何应用程序或方法的指令，联系人数据，电话簿数据，消息，图片，视频等。存储器804可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，如静态随机存取存储器(SRAM)，电可擦除可编程只读存储器(EEPROM)，可擦除可编程只读存储器(EPROM)，可编程只读存储器(PROM)，只读存储器(ROM)，磁存储器，快闪存储器，磁盘或光盘。
电源组件806为终端800的各种组件提供电力。电源组件806可以包括电源管理系统，一个或多个电源，及其他与为终端800生成、管理和分配电力相关联的组件。
多媒体组件808包括在终端800和用户之间的提供一个输出接口的屏幕。在一些实施例中，屏幕可以包括液晶显示器(LCD)和触摸面板(TP)。如果屏幕包括触摸面板，屏幕可以被实现为触摸屏，以接收来自用户的输入信号。触摸面板包括一个或多个触摸传感器以感测触摸、滑动和触摸面板上的手势。触摸传感器可以不仅感测触摸或滑动动作的边界，而且还检测与触摸或滑动操作相关的持续时间和压力。在一些实施例中，多媒体组件808包括一个前置摄像头和/或后置摄像头。当设备800处于操作模式，如拍摄模式或视频模式时，前置摄像头和/或后置摄像头可以接收外部的多媒体数据。每个前置摄像头和后置摄像头可以是一个固定的光学透镜系统或具有焦距和光学变焦能力。
音频组件810被配置为输出和/或输入音频信号。例如，音频组件810包括一个麦克风(MIC)，当终端800处于操作模式，如呼叫模式、记录模式和语音识别模式时，麦克风被配置为接收外部音频信号。所接收的音频信号可以被进一步存储在存储器804或经由通信组件816发送。在一些实施例中，音频组件810还包括一个扬声器，用于输出音频信号。
I/O接口812为处理组件802和外围接口模块之间提供接口，上述外围接口模块可以是键盘，点击轮，按钮等。这些按钮可包括但不限于：主页按钮、音量按钮、启动按钮和锁定按钮。
传感器组件814包括一个或多个传感器，用于为终端800提供各个方面的状态评估。例如，传感器组件814可以检测到设备800的打开/关闭状态，组件的相对定位，例如组件为终端800的显示器和小键盘，传感器组件814还可以检测终端800或终端800一个组件的位置改变，用户与终端800接触的存在或不存在，终端800方位或加速/减速和终端800的温度变化。传感器组件814可以包括接近传感器，被配置用来在没有任何的物理接触时检测附近物体的存在。传感器组件814还可以包括光传感器，如CMOS或CCD图像传感器，用于在成像应用中使用。在一些实施例中，该传感器组件814还可以包括加速度传感器，陀螺仪传感器，磁传感器，压力传感器或温度传感器。
通信组件816被配置为便于终端800和其他设备之间有线或无线方式的通信。终端800可以接入基 于通信标准的无线网络，如Wi-Fi，2G或3G，或它们的组合。在一个示例性实施例中，通信组件816经由广播信道接收来自外部广播管理系统的广播信号或广播相关信息。在一个示例性实施例中，通信组件816还包括近场通信(NFC)模块，以促进短程通信。例如，在NFC模块可基于射频识别(RFID)技术，红外数据协会(IrDA)技术，超宽带(UWB)技术，蓝牙(BT)技术和其他技术来实现。
在示例性实施例中，终端800可以被一个或多个应用专用集成电路(ASIC)、数字信号处理器(DSP)、数字信号处理设备(DSPD)、可编程逻辑器件(PLD)、现场可编程门阵列(FPGA)、控制器、微控制器、微处理器或其他电子元件实现，用于执行上述方法。
在示例性实施例中，还提供了一种包括指令的非临时性计算机可读存储介质，例如包括指令的存储器804，上述指令可由终端800的处理器820执行以完成上述方法。例如，非临时性计算机可读存储介质可以是ROM、随机存取存储器(RAM)、CD-ROM、磁带、软盘和光数据存储设备等。
如图25所示，本公开一实施例示出一种基站的结构。例如，基站900可以被提供为一网络侧设备。参照图25，基站900包括处理组件922，其进一步包括一个或多个处理器，以及由存储器932所代表的存储器资源，用于存储可由处理组件922的执行的指令，例如应用程序。存储器932中存储的应用程序可以包括一个或一个以上的每一个对应于一组指令的模块。此外，处理组件922被配置为执行指令，以执行上述方法前述应用在所述基站的任意方法。
基站900还可以包括一个电源组件926被配置为执行基站900的电源管理，一个有线或无线网络接口950被配置为将基站900连接到网络，和一个输入输出(I/O)接口958。基站900可以操作基于存储在存储器932的操作系统，例如Windows Server TM，Mac OS XTM，UnixTM，LinuxTM，FreeBSDTM或类似。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本发明的其它实施方案。本公开旨在涵盖本发明的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本发明的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本发明的真正范围和精神由下面的权利要求指出。
应当理解的是，本发明并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本发明的范围仅由所附的权利要求来限制。

Claims (20)

  1. 一种小区重选的方法，其中，应用于终端，所述方法，包括：
    根据基于辅助信息确定的服务时间，确定执行小区重选的执行操作；
    其中，所述服务时间，为非地面网络NTN服务小区能够给所述终端提供服务的时间；所述辅助信息，包括：所述NTN服务小区的覆盖范围信息、星历信息和/或所述NTN服务小区能够提供服务的参考服务时间信息。
  2. 根据权利要求1所述的方法，其中，所述根据基于辅助信息确定的服务时间，确定执行小区重选的执行操作，包括：
    响应于所述服务时间小于或者等于时间阈值，确定执行小区重选；
    或者，
    响应于所述服务时间大于所述时间阈值，确定不执行小区重选。
  3. 根据权利要求2所述的方法，其中，所述方法，还包括：
    接收基站下发的携带所述时间阈值的消息。
  4. 根据权利要求1所述的方法，其中，所述方法，还包括：
    响应于触发条件满足，启动用于触发重选小区的定时器的定时；其中，所述定时器的定时时长为根据在所述触发条件满足时确定的所述服务时间确定的；
    所述根据基于辅助信息确定的服务时间，确定执行小区重选的执行操作，包括：
    响应于所述定时器超时，确定执行小区重选；
    或者，
    响应于所述定时器未超时，确定不执行小区重选。
  5. 根据权利要求4所述的方法，其中，所述响应于触发条件满足，启动用于触发重选小区的定时器的定时，包括：
    响应于所述终端通过小区重选接入所述NTN服务小区，启动所述定时器的定时；
    或者，
    响应于所述终端在所述NTN服务小区中从连接态切换至非连接态，启动所述定时器的定时；其中，所述定时器的定时时长小于或等于所述服务时间。
  6. 根据权利要求1所述的方法，其中，所述方法，还包括：
    根据所述NTN服务小区的覆盖范围信息、所述终端当前所在位置的信息、所述NTN服务小区的星历信息和/或所述NTN服务小区能够提供服务的参考服务时间信息，确定所述服务时间。
  7. 根据权利要求6所述的方法，其中，响应于所述辅助信息不包括所述NTN服务小区能够提供服务的参考时间信息；所述方法，还包括：
    根据所述NTN服务小区的覆盖范围信息和所述星历信息，确定所述NTN服务小区能够提供服务的参考服务时间信息。
  8. 根据权利要求7所述的方法，其中，所述根据所述NTN服务小区的覆盖范围信息和所述星历信息，确定所述NTN服务小区能够提供服务的参考服务时间信息，包括：
    根据NTN服务小区的径距、卫星的运动速度和/或卫星运行的轨道高度，确定所述NTN服务小区能够提供服务的参考服务时间信息；其中，所述径距，为半径或者直径。
  9. 根据权利要求8所述的方法，其中，所述方法，还包括：
    基于所述终端当前所在位置和所述参考点的位置，确定所述终端当前所在位置与所述NTN服务小区边缘的相对距离；其中，所述服务时间，为所述终端根据所述相对距离、所述NTN服务小区的径距和所述NTN服务小区能够提供服务的参考服务时间信息确定的时间。
  10. 根据权利要求9所述的方法，其中，所述方法，还包括：
    根据星历信息确定所述参考点的位置；
    或者，
    根据基站发送的参考点的位置信息确定所述参考点的位置。
  11. 根据权利要求1所述的方法，其中，所述方法，还包括：
    接收基站发送的所述辅助信息；
    或者，
    根据所述终端中的预定配置确定所述辅助信息。
  12. 根据权利要求11所述的方法，其中，所述接收基站发送的所述辅助信息，包括：
    接收所述基站发送的携带所述辅助信息的系统消息；
    或者，
    接收所述基站发送的携带所述辅助信息的无线资源控制RRC消息。
  13. 一种小区重选的方法，其中，应用于基站，所述方法，包括：
    向终端发送辅助信息；
    其中，所述辅助信息，用于供所述终端确定NTN服务小区能够给所述终端提供服务的服务时间；所述辅助信息，包括：所述NTN服务小区的覆盖范围信息、星历信息和/或所述NTN服务小区能够提供服务的参考时间信息。
  14. 根据权利要求13所述的方法，其中，所述向终端发送辅助信息，包括：
    向所述终端发送携带所述辅助信息的系统消息；
    或者，
    向所述终端发送携带所述辅助信息的无线资源控制RRC消息。
  15. 根据权利要求13所述的方法，其中，所述方法，还包括：
    向所述终端发送参考点的位置信息；
    其中，所述参考点的位置信息，指示用于确定所述服务时间的参考点的位置。
  16. 根据权利要求13所述的方法，其中，所述方法，还包括：
    向所述终端发送携带时间阈值的消息；
    其中，所述时间阈值用于供所述终端执行小区重选的执行操作。
  17. 一种小区重选的装置，其中，应用于终端，所述装置，包括确定模块；其中，
    所述确定模块，被配置为：根据基于辅助信息确定的服务时间，确定执行小区重选的执行操作；
    其中，所述服务时间，为非地面网络NTN服务小区能够给所述终端提供服务的时间；所述辅助信息，包括：所述NTN服务小区的覆盖范围信息、星历信息和/或所述NTN服务小区能够提供服务的参考服务时间信息。
  18. 一种小区重选的装置，其中，应用于基站，所述装置，包括发送模块；其中，
    所述发送模块，被配置为向终端发送辅助信息；
    其中，所述辅助信息，用于供所述终端确定NTN服务小区能够给所述终端提供服务的服务时间；所述辅助信息，包括：所述NTN服务小区的覆盖范围信息、星历信息和/或所述NTN服务小区能够提供服务的参考时间信息。
  19. 一种通信设备，其中，包括：
    天线；
    存储器；
    处理器，分别与所述天线及存储器连接，被配置为通执行存储在所述存储器上的计算机可执行指令，控制所述天线的收发，并能够实现权利要求1至12或权利要求13至权利要求16任一项提供的方法。
  20. 一种计算机存储介质，所述计算机存储介质存储有计算机可执行指令，所述计算机可执行指令被处理器执行后能够实现权利要求1至12或权利要求13至权利要求16任一项提供的方法。
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