WO2022155972A1 - 小区切换方法及装置、通信设备及存储介质 - Google Patents

小区切换方法及装置、通信设备及存储介质 Download PDF

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Publication number
WO2022155972A1
WO2022155972A1 PCT/CN2021/073659 CN2021073659W WO2022155972A1 WO 2022155972 A1 WO2022155972 A1 WO 2022155972A1 CN 2021073659 W CN2021073659 W CN 2021073659W WO 2022155972 A1 WO2022155972 A1 WO 2022155972A1
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Prior art keywords
cell
serving cell
handover
edge
indication information
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PCT/CN2021/073659
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English (en)
French (fr)
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洪伟
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北京小米移动软件有限公司
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Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to PCT/CN2021/073659 priority Critical patent/WO2022155972A1/zh
Priority to CN202180000312.0A priority patent/CN115136655B/zh
Publication of WO2022155972A1 publication Critical patent/WO2022155972A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H04W36/083—Reselecting an access point wherein at least one of the access points is a moving node

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, relates to a cell handover method and device, a communication device, and a storage medium.
  • NTN Non-Terrstrial Network
  • UE User Equipment
  • the process of selecting a target base station may trigger signaling exchanges between base stations;
  • Handover execution stage After the target base station is selected, the current serving base station will inform the UE of the message needed to access the target base station.
  • the terminal UE uses the random access procedure to access the target base station;
  • Handover completion stage the source base station releases resources, links, and deletes user information.
  • some UEs may lose synchronization with the serving cell after measuring the neighboring cell;
  • Embodiments of the present disclosure provide a cell handover method and apparatus, a communication device, and a storage medium.
  • a first aspect of the embodiments of the present disclosure provides a cell handover method, wherein, when applied to a user equipment UE, the method includes:
  • edge indication information is sent to the access device of the NTN.
  • a second aspect of the embodiments of the present disclosure provides a cell handover method, which is applied to an access device of a non-terrestrial network NTN, including:
  • the edge indication information send a handover request message to the target cell of the cell handover;
  • a cell handover command is sent to the UE.
  • a third aspect of the embodiments of the present disclosure provides a cell handover apparatus, wherein, when applied to a user equipment UE, the apparatus includes:
  • the first sending module is configured to send edge indication information to the access device of the NTN in response to the UE being located in the edge area of the serving cell.
  • a fourth aspect of the embodiments of the present disclosure provides a cell handover apparatus, which is applied to an access device of a non-terrestrial network NTN, including:
  • a third receiving module configured to receive edge indication information reported by the user equipment UE
  • the second sending module is configured to send a handover request message to the target cell of the cell handover according to the edge indication information
  • the third sending module is configured to send a cell handover command to the UE according to the response message of the handover request message.
  • a fifth aspect of the embodiments of the present disclosure provides a communication device, including a processor, a transceiver, a memory, and an executable program stored on the memory and capable of being run by the processor, wherein the processor runs the executable program When the program is executed, the first aspect or the second aspect provides a cell handover method.
  • a sixth aspect of the embodiments of the present disclosure provides a computer storage medium, where an executable program is stored in the computer storage medium; after the executable program is executed by a processor, the cell provided in the first aspect or the second aspect can be implemented Switch method.
  • the UE when the UE detects that it is located in the edge area of the serving cell, it reports the edge indication information that it is in the edge area to the access device of the NTN, and the edge indication information can at least trigger the network side to deliver the cell
  • the handover command saves the UE's step of measuring the reference signal of the neighboring cell, reduces the out-of-sync phenomenon with the serving cell caused by the UE measuring the reference signal of the neighboring cell for too long, and simplifies the cell handover process. Cell handover efficiency; and reduce the phenomenon of poor cell handover performance and low cell throughput caused by this delay, and improve cell handover performance and cell throughput.
  • the edge indication information can also be used by the serving cell to determine the location of the UE, so as to provide location-related communication services.
  • FIG. 1 is a schematic structural diagram of a wireless communication system according to an exemplary embodiment
  • FIG. 2 is a schematic flowchart of a cell handover method according to an exemplary embodiment
  • FIG. 3 is a schematic flowchart of a cell handover method according to an exemplary embodiment
  • FIG. 4 is a schematic flowchart of a cell handover method according to an exemplary embodiment
  • FIG. 5 is a schematic structural diagram of a cell handover apparatus according to an exemplary embodiment
  • FIG. 6 is a schematic structural diagram of a cell handover apparatus according to an exemplary embodiment
  • FIG. 7 is a schematic structural diagram of a UE according to an exemplary embodiment
  • Fig. 8 is a schematic structural diagram of an access device 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.”
  • 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 cellular mobile communication technology, and the wireless communication system may include: several UEs 11 and several base stations 12 .
  • the UE11 may be a device that provides voice and/or data connectivity to the user.
  • the UE11 may communicate with one or more core networks via a Radio Access Network (RAN), and the UE11 may be an IoT UE, such as a sensor device, a mobile phone (or "cellular" phone) and an IoT-enabled UE.
  • RAN Radio Access Network
  • the UE's computer for example, may be a stationary, portable, pocket-sized, hand-held, computer-built-in, or vehicle-mounted device.
  • a station For example, a station (Station, STA), a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile station), a mobile station (mobile), a remote station (remote station), an access point, a remote UE ( remote terminal), access UE (access terminal), user device (user terminal), user agent (user agent), user equipment (user device), or user UE (user equipment, UE).
  • the UE11 may also be a device of an unmanned aerial vehicle.
  • the UE 11 may also be an in-vehicle device, for example, a trip computer with a wireless communication function, or a wireless communication device connected to an external trip computer.
  • the UE11 may also be a roadside device, for example, may be a streetlight, a signal light, or other roadside device having a wireless communication function.
  • the base station 12 may be a network-side device in a wireless communication system.
  • the wireless communication system may be a fourth generation mobile communication (the 4th generation mobile communication, 4G) system, also known as a long term evolution (Long Term Evolution, LTE) system; or, the wireless communication system may also be a 5G system, Also known as new radio (NR) 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 MTC system may be a network-side device in a wireless communication system.
  • the base station 12 may be an evolved base station (eNB) used in the 4G system.
  • the base station 12 may also be a base station (gNB) that adopts a centralized distributed architecture in the 5G system.
  • eNB evolved base station
  • gNB base station
  • the base station 12 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 12 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 12 is not limited in this embodiment of the present disclosure.
  • a wireless connection can be established between the base station 12 and the UE 11 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 UE11.
  • 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 wireless communication system may further include a network management device 13 .
  • the network management device 13 may be a core network device in a wireless communication system, for example, the network management device 13 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 rules 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 13 is not limited in this embodiment of the present disclosure.
  • NTN non-terrestrial network
  • VAST Very Small Aperture Terminal
  • the VSAT terminal performs measurements on neighboring cells according to the cell handover process of the above-mentioned terrestrial network, it takes tens of seconds to tens of seconds for the VSAT It takes time to adjust the working frequency of its receiver to perform neighbor cell measurement, and after the measurement is completed, it takes a dozen to tens of seconds to adjust the working frequency of its receiver back to the frequency corresponding to the serving cell. During this period, the VSAT has lost the timing information of the serving cell, which may cause the UE to lose synchronization with the serving cell. Therefore, the traditional cell handover procedure of the terrestrial network is not suitable for the cell handover of the VSAT in the non-terrestrial network (NTN) system. Therefore, it is necessary to introduce a handover procedure suitable for a non-terrestrial network (NTN) to improve the handover performance in the NTN system.
  • NTN non-terrestrial network
  • an embodiment of the present disclosure provides a cell handover method, which, when applied to a user equipment UE, includes:
  • S110 In response to the UE being located in the edge area of the serving cell, send edge indication information to the access device of the NTN.
  • the UE may be various terminals capable of accessing an NTN cell of the NTN.
  • the UE may include: Very Small Aperture Terminal (VAST), Personal Earth Station (Personal Earth Station, PEC) or satellite small data station (referred to as small station).
  • VAST Very Small Aperture Terminal
  • PEC Personal Earth Station
  • small station satellite small data station
  • the UE when the UE determines that it is located in the edge area of the serving cell, the UE sends edge indication information to the access device of the NTN.
  • the access equipment of the NTN here includes, but is not limited to: a serving cell.
  • the serving cell may be a cell formed by satellite coverage.
  • the satellite of the serving cell may be a low earth orbit (Low earth Orbit, LEO) satellite and other non-geostationary satellites that are not synchronous with the earth.
  • LEO low earth orbit
  • the UE may locate its own position information through various positioning methods, for example, obtain its own position information through positioning satellites, or obtain its own position information through triangulation of a base station based on an NT network, etc. , or use a sensor such as a gravitational acceleration sensor to locate its own position information.
  • the UE obtains its own position information through Global Positioning System (Global Positioning System, GPS) positioning, and/or obtains its own position information through Global Navigation Satellite System (Global Navigation Satellite System, GNSS) positioning .
  • Global Positioning System Global Positioning System, GPS
  • GNSS Global Navigation Satellite System
  • the UE may determine whether it is located in the edge area of its own serving cell according to its own location information.
  • the service area of the serving cell includes: a central area and an edge area.
  • the central area includes the cell center of the serving cell; the edge area is located at the periphery of the central area and does not include the cell center.
  • the cell center is also referred to as the center location.
  • the serving cell delivers the area information of the central area and/or the edge area, so that the UE can determine whether it is located in the edge area of the serving cell after locating its own location information.
  • the distance between the position of the UE and the center of the serving cell is smaller, it means that the UE is closer to the center of the serving cell, and the probability that the UE is located in the center area of the serving cell is higher. Since the UE is located at the edge of the serving cell, it is necessary to switch cells, so the edge indication information is reported when the UE is located in the edge area of the serving cell.
  • the UE determines that it is located in the edge area of the serving cell, it sends edge indication information to an access device (including but not limited to satellites) of the serving cell.
  • the edge indication information indicates that the UE is currently located in the edge area of the serving cell. In this way, the NTN access device will consider whether it is necessary to start the UE to perform handover of the NTN cell.
  • the edge indication information may include at least one indication bit for displaying an indication.
  • the bit value of the indication bit is a preset value
  • the UE indicates to the NTN that it is located in the edge area of the current serving cell.
  • the edge indication information can be implicitly indicated by a signaling format of other signaling or other information content having any corresponding relationship with the edge indication information.
  • the edge indication information may be reported through RRC signaling, or may be reported through uplink control information (Uplink Control Imformation, UCI).
  • uplink control information Uplink Control Imformation, UCI.
  • the edge indication information may independently include: an indication bit, indicating that the UE is located in an edge area; the number of the indication bits may be one or more.
  • the edge indication information may further include: location information, indicating that the UE is located in the edge area, the location information can be used by the network side to verify whether the UE is indeed located in the edge area of the serving cell.
  • the RRC signaling or UCI sent by the RRC connection may be used.
  • the RRC resume (Resume) signaling report may be reported through a paging response.
  • the edge indication information can be used at least to trigger the access device to issue a cell handover command.
  • an embodiment of the present disclosure provides a cell handover method, which may include:
  • S100 In response to the distance between the position of the UE and the central position of the serving cell being greater than or equal to a threshold value, determine that the UE is located in an edge area of the serving cell.
  • an embodiment of the present disclosure provides a cell handover method, which may include:
  • S120 In response to the distance between the position of the UE and the central position of the serving cell being less than the threshold value, determine that the UE is located in the central area of the serving cell.
  • This step S120 may be a solution of combining with S110 to form a cell handover method, or may be independently formed with S110 to form a cell handover method.
  • the distance between the position of the UE and the center point of the serving cell is used to simplify whether the UE is located in the edge area of the serving cell in combination with its own position.
  • the UE determines by the distance between its own location and the cell center of the serving cell, which can be used to determine whether it is located in the edge area of the serving cell.
  • the UE may also determine whether it is located in the edge area through the position between its own position and the reference points of other positions in the cell. For example, if the UE determines that the position between its own position and at least one edge point among multiple edge points of the serving cell is less than or equal to the distance threshold, it can be considered that it is located in the edge area of the serving cell.
  • the UE may determine the area information of the edge area in advance. For example, the range of the edge area may be known according to the area information. The UE finds that its location is within the range indicated by the area information, and can also determine that it is located in the area indicated by the area information. The edge area of the serving cell.
  • Both the location information of the UE and the location information of the center location of the serving cell may be indicated by latitude and longitude, or may be indicated by coordinates in a world coordinate system. In a word, there are various ways of presenting the location information of the UE and the location information of the central location of the serving cell.
  • the method further comprises: receiving the threshold value of the serving cell.
  • the threshold value can be issued by the NTN network.
  • the threshold value is sent by broadcast, multicast or unicast of the serving cell.
  • the threshold value may be carried in a master message block (Master Imformation Block, MIB) or a system message block (System Imformation Block, SIB) 1.
  • MIB Master Imformation Block
  • SIB System Imformation Block
  • the NTN network may send a multicast message to a certain type of UE, for example, send a multicast message to a VSAT or a PEC.
  • This specific type of UE includes but is not limited to: any UE that triggers the NTN to issue a cell handover command according to whether its position is located in the edge area of the serving cell.
  • the threshold value can be used by the UE to determine whether it is located in the edge area of the serving cell based on the distance between itself and a reference position such as a central location.
  • sending edge indication information to the access device of the NTN includes:
  • the edge indication information is sent to an access device of the NTN in response to the UE being located in the edge area of the serving cell and the UE moving away from the center area of the serving cell.
  • the satellite forming the serving cell is an asynchronous satellite
  • the satellite and the UE are relatively moving, and the moving speed of the satellite is far greater than the moving speed of the UE.
  • the UE moves in a direction away from the central area of the serving cell. Even if the UE does not report its own movement information, the satellite of the serving cell can determine the target cell that the UE can access according to its own movement relative to the earth.
  • the UE may report the edge indication information after determining that it is located in the edge area of the serving cell. In order to reduce inconvenient reporting, the UE may determine that it is facing away from the serving cell relative to the serving cell. The direction of movement of the central area is reported in the edge indication information.
  • the UE may receive the ephemeris information of the satellites, so that the motion trajectory of the satellites forming the current serving cell can be determined according to the ephemeris information of the satellites, thereby determining that it is service-oriented relative to the serving cell
  • the central area of the cell still moves to the edge area. If the UE is currently located in the edge area of the serving cell and moves toward the center area of the serving cell, the UE does not report the edge indication information. Therefore, the UE reports the edge indication information only when it is determined that it is located in the edge area of the current serving cell and moves away from the center area of the serving cell.
  • the UE determines whether it is moving in the central area of the serving cell or moving away from the central area of the serving cell.
  • One is to determine the distance between its own location information and the central location of the serving cell at two moments.
  • the UE moves in a direction away from the central area of the serving cell, including:
  • the distance between the position of the UE at time t-m and the center position of the serving cell is smaller than the distance between the position of the UE at time t and the center position of the serving cell, where the t is a positive integer greater than or equal to m; the m is a positive integer.
  • the UE may periodically determine the distance between its own location information and the center location of the serving cell. If m is equal to 1, that is, if two adjacent moments, the distance between the location information of the UE and the center location of the serving cell increases. If it is large, it means that the UE is moving away from the regional center of the serving cell.
  • the value of m may also be 2 or 3.
  • the m may be any value between 1 and 10.
  • the value of m may be determined according to the moving speed of the UE, if the moving speed of the UE can be negatively correlated with the value of m.
  • the UE may also determine the movement direction of the satellite according to the ephemeris information of the satellite in the serving cell, and determine whether it moves in a direction away from the central area of the serving cell according to the movement direction.
  • the UE accurately determines whether it is in a direction of movement that is away from the center position of the serving cell in combination with the ephemeris information of the satellite of the serving cell and its own movement information.
  • the method further includes:
  • the center position of the serving cell is determined according to the ephemeris information of the satellite of the serving cell.
  • the UE may receive ephemeris information sent by the serving cell, and may calculate the center position of the serving cell at any time according to the ephemeris information.
  • the UE may periodically receive the central location of the serving cell from the serving cell.
  • the UE acquires the center position of the serving cell, which is not limited to any one of the above.
  • the method further includes:
  • the UE After the UE reports the edge indication information, and the NTN side confirms that the UE needs to switch cells, it will issue a cell switching command to the UE. After receiving the cell handover command, the UE will perform the handover of the serving cell, and switch the serving cell from the source cell to the target cell.
  • the UE will release the link and resources with the source cell, and request to access the target cell, synchronize with the target cell and establish a connection.
  • the UE accesses the target cell through a random access message.
  • the cell handover command carries synchronization configuration information and RRC reconfiguration information for the UE to connect to the target cell.
  • the UE After receiving the cell handover command, the UE performs synchronization with the target cell according to the synchronization configuration information.
  • the RRC reconfiguration information is used for the UE to perform radio resource reconfiguration. Random access is initiated after the UE synchronizes with the target cell and/or completes the RRC reconfiguration.
  • an embodiment of the present disclosure provides a cell handover method, which is applied to an access device of a non-terrestrial network NTN, including:
  • S220 Send a handover request message to the target cell of the cell handover according to the edge indication information
  • S230 Send a cell handover command to the UE according to the response message of the handover request message.
  • the cell access method is that the access device used for NTN may be a satellite or the like.
  • the UE may be the aforementioned VAST or PES or the like.
  • the edge indication information indicates that the reported UE is located in the edge area of the serving cell. That is, the edge indication information may be reported when the UE is in the edge area of the serving cell.
  • the access device may directly send the handover request information to the target cell.
  • the NTN access device receives the edge information. After indicating the information, the handover request message may be directly sent to the satellite of the target cell.
  • the edge indication information is: reported by the UE when it determines that it is located in the edge area of the serving cell
  • the satellite of the serving cell determines that the distance between itself and the UE is increasing according to its ephemeris information, that is, If the distance between the central area of the serving cell and the UE changes in the direction of increasing, the handover request message is sent to the target cell, otherwise the handover request message may not be sent to the target cell.
  • the access device of the NTN can determine the target cell to be accessed by the UE according to relative position information and/or ephemeris information of multiple satellites of the NTN.
  • the target cell After the target cell receives the handover request message, if the UE is allowed to access, it will perform access control and/or handover preparation of the UE.
  • the target cell If the target cell agrees to the access of the UE, it will return a response message indicating confirmation to the serving cell based on the handover request message.
  • the acknowledgement message carries an acknowledgement character (ACK).
  • the target cell determines that the target cell is ready for the UE to access after receiving the response message, it can send a cell handover command to the UE; through the cell handover command, the UE is triggered to switch the serving cell from the current cell (ie the source cell). to the target cell.
  • what the serving cell receives is no longer the measurement report generated by the UE reporting the signal quality of the reference signal of its own cell and/or neighboring cells, but the UE reports when it determines that it is in the edge area of the serving cell edge indication information.
  • the response message carries the cell handover command in the form of a radio resource control RRC container.
  • the serving cell can directly transparently transmit the cell handover command to the UE.
  • Transparent transmission means that the relay node between the sender and the receiver of the message directly forwards the message to the receiver without parsing the content sent by the sender.
  • the serving cell for the serving cell to transparently transmit the cell handover command to the UE: the serving cell directly sends the cell handover command sent by the target cell to the UE without parsing the cell handover command.
  • the acknowledgement message has at least one bit, and the indication bit is used to carry an ACK or a Non Acknowledgement character (NACK).
  • the serving cell decodes the bit and determines that the response message carries an ACK, and transparently transmits the cell handover command carried in the response message to the UE, otherwise it can stop decoding the remaining bits of the response message. If the indication bit carries NACK, the serving cell may stop decoding the remaining bits of the acknowledgement message.
  • the access device may not send a cell handover command to the UE, or send a handover rejection command to the UE.
  • the S230 may include: sending the cell handover command carried in the response message to the UE.
  • the cell handover command is generated by the target cell.
  • the UE being located in the edge area of the serving cell includes: the distance between the position of the UE and the central position of the serving cell is greater than or equal to a threshold value.
  • the central location of the serving cell is used for the UE to determine whether it is located in the edge area of the serving cell, which has the characteristic of simple calculation of the UE.
  • the method further includes:
  • the threshold value is sent.
  • Sending this threshold value can include:
  • One or more of the methods of directly sending the value of the threshold value and sending the index of the threshold value are provided.
  • the network side can send the threshold value through a broadcast message, a multicast message or a unicast message.
  • the access device of the NTN broadcasts the threshold value through MIB and/or SIB1 or the like, or sends the threshold value through an RRC message and/or MAC CE.
  • the sending the indication information of the edge threshold includes: sending the threshold value according to the cell area of the serving cell.
  • the cell area of the serving cell is different, so the threshold value is different.
  • the cell area of the serving cell is positively correlated with the threshold value, that is, the larger the cell area of the serving cell, the larger the threshold value.
  • the inner diameter of the serving cell is positively correlated with the threshold value, for example, the larger the inner diameter of the serving cell, the larger the threshold value.
  • the inner diameter of the serving cell is positively correlated with the area of the serving cell.
  • the cell handover command carries synchronization configuration information and RRC reconfiguration information for the UE to connect to the target cell.
  • the synchronization configuration information can be used for synchronization between the UE and the target cell; the RRC reconfiguration information can be used for the UE to reconfigure radio resources; the reconfigured radio resources are the radio resources of the target cell.
  • an embodiment of the present disclosure provides a cell handover apparatus, which, when applied to a user equipment UE, includes:
  • the first sending module 510 is configured to send edge indication information to the access device of the NTN in response to the UE being located in the edge area of the serving cell.
  • the first sending module 510 includes but is not limited to: a program module; the program module is executed by the processor, and can report the edge indication information when the UE is located in the edge area of the serving cell.
  • the first sending module 510 may be a software-hardware combination module; the software-hardware combination module includes but is not limited to: a programmable array; the programmable array includes but is not limited to: a field programmable array and/or complex programmable arrays.
  • the first sending module 510 may include a pure hardware module; the pure hardware module includes but is not limited to: an application specific integrated circuit.
  • the edge indication information is used to trigger the access device to issue a cell handover command.
  • the apparatus further comprises:
  • the first determining module is configured to determine that the UE is located in the edge area of the serving cell in response to the distance between the position of the UE and the central position of the serving cell being greater than or equal to a threshold value.
  • the apparatus further includes: a first receiving module configured to receive the threshold value of the serving cell.
  • the first sending module 510 is configured to, in response to the UE being located in the edge area of the serving cell and the UE moving away from the central area of the serving cell, send the UE to the serving cell.
  • the access device of the NTN sends the edge indication information.
  • the UE moves in a direction away from the central area of the serving cell, including:
  • the distance between the position of the UE at time t-m and the center position of the serving cell is smaller than the distance between the position of the UE at time t and the center position of the serving cell, where the t is a positive integer greater than or equal to m; the m is a positive integer.
  • the apparatus further comprises:
  • the second determining module is configured to determine the center position of the serving cell according to the ephemeris information of the satellite of the serving cell.
  • the apparatus further comprises:
  • a second receiving module configured to receive the cell handover command
  • a handover module configured to handover to a target cell in response to receiving the cell handover command.
  • an embodiment of the present disclosure provides a cell handover apparatus, which is applied to an access device of a non-terrestrial network NTN, including:
  • the third receiving module 610 is configured to receive the edge indication information reported by the user equipment UE; exemplarily, the third receiving module 610 may be configured to receive the edge indication information reported when the UE is located in the edge area of the serving cell;
  • the second sending module 620 is configured to send a handover request message to the target cell of the cell handover according to the edge indication information
  • the third sending module 630 is configured to send a cell handover command to the UE according to the response message of the handover request message.
  • the third receiving module 610 , the second sending module 620 and the third sending module 630 may all be program modules; after the program modules are executed by the processor, edge indication information can be implemented the reception of the cell handover request message, and the response message to send the cell handover command.
  • the third receiving module 610, the second sending module 620, and the third sending module 630 may all be software-hardware modules; the software-hardware modules include but are not limited to: Program the array.
  • the programmable arrays include, but are not limited to, complex programmable arrays and/or field programmable arrays.
  • the third receiving module 610, the second sending module 620 and the third sending module 630 may all be pure hardware modules; the pure hardware modules include but are not limited to application specific integrated circuits .
  • the response message carries the cell handover command in the form of a radio resource control RRC container
  • the third sending module 630 is configured to send the cell handover command carried in the response message to the UE.
  • the UE being located in the edge area of the serving cell includes: the distance between the position of the UE and the central position of the serving cell is greater than or equal to a threshold value.
  • the third sending module 630 is configured to send the threshold value.
  • the third sending module 630 is configured to send the indication information of the edge threshold according to the cell area of the serving cell.
  • the cell handover command carries synchronization configuration information and RRC reconfiguration information for the UE to connect to the target cell.
  • the embodiment of the present disclosure provides a cell handover method suitable for an NTN system.
  • P is the current real-time position information of the terminal UE
  • P 2 is the central position of the cell covered by the satellite calculated by the UE in real time according to the obtained satellite ephemeris information
  • Step 2 The source serving cell configures the threshold value D Thres at the cell edge according to the size of the cell on the ground covered by the satellite
  • Step 3 When the distance ⁇ D t between the UE and the center of the source serving cell is greater than or equal to D Thres and the distance ⁇ D t between the UE and the center of the serving cell at time t (for example, the current time) is greater than t-1 (for example, the previous time)
  • the UE reports the indication information that the UE is at the cell edge to the serving cell; the cell edge here may correspond to the aforementioned edge area.
  • Step 4 After the serving cell receives the cell edge indication signaling, the serving cell sends a handover request message to the target cell, and the target cell is the cell corresponding to the UE that will be covered by the next satellite. After receiving the handover request command, the target cell performs admission control and handover preparation. At the same time, a handover request response message (ACK) is sent to the source cell, wherein the handover command sent to the terminal is included in the response message in the form of an RRC container (container).
  • ACK handover request response message
  • Step 5 The source cell triggers an air interface handover, and sends a handover command to the terminal UE.
  • the handover command can be generated by the target cell and includes RRC reconfiguration information with a synchronization configuration message.
  • the source cell here is the current serving cell of the UE.
  • Step 6 After receiving the handover command, the terminal performs synchronization with the target cell and initiates random access.
  • the embodiment of the present disclosure provides a cell handover method suitable for the NTN system, which can effectively solve the problem that in the NTN system, based on the terrestrial cell handover mechanism, the VSAT loses synchronization with the serving cell after measuring the neighboring cell, and can improve the The cell handover performance under the NTN system improves the system throughput performance.
  • Embodiments of the present disclosure provide a communication device, including:
  • memory for storing processor-executable instructions
  • the processor is connected to the memory;
  • the processor is configured to execute the cell handover method provided by any of the foregoing technical solutions.
  • the processor may include various types of storage media, which are non-transitory computer storage media that can continue to memorize information stored thereon after the communication device is powered down.
  • the communication device includes an NTN access device or UE.
  • the processor may be connected to the memory through a bus or the like, for reading executable programs stored on the memory, for example, at least one of the methods shown in FIG. 2 to FIG. 4 .
  • FIG. 7 is a block diagram of a UE (UE) 800 according to an exemplary embodiment.
  • UE 800 may be a mobile phone, computer, digital broadcast user equipment, messaging device, game console, tablet device, medical device, fitness device, personal digital assistant, and the like.
  • UE 800 may include one or more of the following components: processing component 802, memory 804, power supply component 806, multimedia component 808, audio component 810, input/output (I/O) interface 812, sensor component 814, and Communication component 816.
  • the processing component 802 generally controls the overall operations of the UE 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 UE 800 . Examples of such data include instructions for any application or method operating on the UE 800, contact data, phonebook data, messages, pictures, videos, etc.
  • 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 component 806 provides power to various components of UE 800 .
  • Power components 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to UE 800 .
  • Multimedia component 808 includes screens that provide an output interface between the UE 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. The touch sensor may not only sense the boundaries of a touch or swipe action, but also detect 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 UE 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 UE 800 is in operating modes, such as call mode, recording mode, and 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 component 814 includes one or more sensors for providing various aspects of status assessment for UE 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 UE 800, the sensor component 814 can also detect the position change of the UE 800 or a component of the UE 800, the user and the UE 800. Presence or absence of UE800 contact, UE800 orientation or acceleration/deceleration and UE800 temperature changes.
  • 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 communications between UE 800 and other devices.
  • the UE 800 can access a wireless network based on a communication standard, such as WiFi, 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
  • UE 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 gates An array (FPGA), controller, microcontroller, microprocessor, or other electronic component implementation for performing the above method.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGA field programmable gates
  • controller microcontroller, microprocessor, or other electronic component implementation for performing 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 UE 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 an access device.
  • the access device 900 may be provided as a network-side device, such as a satellite in the network-side device.
  • the access device 900 includes a processing component 922, which further includes one or more processors, and a memory resource, represented by memory 932, for storing instructions executable by the processing component 922, such as an application program.
  • 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 execute any of the aforementioned methods applied to the access device, eg, the methods shown in FIGS. 2-4 .
  • the access device 900 may also include a power supply assembly 926 configured to perform power management of the access device 900, a wired or wireless network interface 950 configured to connect the access device 900 to a network, and an input and output (I/O ) interface 958.
  • Access device 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

本公开实施例提供一种小区切换方法及装置、通信设备及存储介质。应用于用户设备UE中的所述小区切换方法可包括：包括：响应于所述UE位于服务小区的边缘区域内，向NTN的接入设备发送边缘指示信息。

Description

小区切换方法及装置、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，尤其涉及一种小区切换方法及装置、通信设备及存储介质。
背景技术
在非地面网络(Non-Terrstrial Network，NTN)场景中，由于卫星相对地面位置的快速变化，终端被同一颗卫星连续覆盖的时间只有几分钟到十几分钟。根据地面网络(Terrstrial Network，TN)的小区切换流程简述如下：
测量和报告：用户设备(User Equipment，UE)对配置邻小区进行测量，并将测量结果报告给服务基站，服务基站根据上报的测量结果判断是否满足切换条件；
准备切换：当服务基站判断切换条件满足时，开始为UE选择目标基站。选择目标基站的过程可能触发基站之间的信令交换；
切换执行阶段：目标基站选定后，当前服务基站就会告知UE接入目标基站时需要的消息。终端UE采用随机接入流程来接入目标基站；
切换完成阶段：源基站释放资源、链路，删除用户信息。
将TN网络的小区切换流程直接移植到NTN网络，会出现有的UE测量邻小区之后就丢失与服务小区的同步；或者，出现切换延时大或者切换之后的小区通信质量差的现象。
发明内容
本公开实施例提供一种小区切换方法及装置、通信设备及存储介质。
本公开实施例第一方面提供一种小区切换方法，其中，应用于用户设备UE中，包括：
响应于所述UE位于服务小区的边缘区域内，向NTN的接入设备发送边缘指示信息。
本公开实施例第二方面提供一种小区切换方法，其中，应用于非地面网络NTN的接入设备中，包括：
接收用户设备UE上报的边缘指示信息；
根据所述边缘指示信息，向小区切换的目标小区发送切换请求消息；
根据所述切换请求消息的应答消息，向所述UE发送小区切换命令。
本公开实施例第三方面提供一种小区切换装置，其中，应用于用户设备UE中，包括：
第一发送模块，被配置为响应于所述UE位于服务小区的边缘区域内，向NTN的接入设备发送边缘指示信息。
本公开实施例第四方面提供一种小区切换装置，其中，应用于非地面网络NTN的接入设备中，包括：
第三接收模块，被配置为接收用户设备UE上报的边缘指示信息；
第二发送模块，被配置为根据所述边缘指示信息，向小区切换的目标小区发送切换请求消息；
第三发送模块，被配置为根据所述切换请求消息的应答消息，向所述UE发送小区切换命令。
本公开实施例第五方面提供一种通信设备，包括处理器、收发器、存储器及存储在存储器上并能够有所述处理器运行的可执行程序，其中，所述处理器运行所述可执行程序时执行如前述第一方面或第二方面提供小区切换方法。
本公开实施例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可执行程序；所述可执行程序被处理器执行后，能够实现前述的第一方面或第二方面提供的小区切换方法。
本公开实施例提供的技术方案，UE检测到自身位于服务小区的边缘区域内时，向NTN的接入设备上报自身处于边缘区域的边缘指示信息，该边缘指示信息可至少触发网络侧下发小区切换命令，如此就节省了UE测量邻小区的参考信号的步骤，减少了UE因为测量邻小区的参考信号的时长过长导致的与服务小区的失步现象，同时简化了小区切换过程，提升了小区切换效率；并且减少因为这种延时导致的小区切换性能差和小区吞吐量低的现象，提升小区切换性能和小区吞吐量。当然在一些实施例中，该边缘指示信息还可用于服务小区确定UE的位置，从而提供与位置相关的通信服务。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开实施例。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本发明实施例，并与说明书一起用于解释本发明实施例的原理。
图1是根据一示例性实施例示出的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小区切换方法的流程示意图；
图3是根据一示例性实施例示出的一种小区切换方法的流程示意图；
图4是根据一示例性实施例示出的一种小区切换方法的流程示意图；
图5是根据一示例性实施例示出的一种小区切换装置的结构示意图；
图6是根据一示例性实施例示出的一种小区切换装置的结构示意图；
图7是根据一示例性实施例示出的一种UE的结构示意图；
图8是根据一示例性实施例示出的一种接入设备的结构示意图。
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发明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、本发明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”。
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蜂窝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UE11以及若干个基站12。
其中，UE11可以是指向用户提供语音和/或数据连通性的设备。UE11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，UE11可以是物联网UE，如传感器设备、移动电话(或称为“蜂窝”电话)和具有物联网UE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UE(remote terminal)、接入UE(access terminal)、用户装置(user terminal)、用户代理(user agent)、用户设备(user device)、或用户UE(user equipment，UE)。或者，UE11也可以是无人飞行器的设备。或者，UE11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通信设备。或者，UE11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12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(new radio，NR)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)。或者，MTC系统。
其中，基站12可以是4G系统中采用的演进型基站(eNB)。或者，基站12也可以是5G系统 中采用集中分布式架构的基站(gNB)。当基站12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12的具体实现方式不加以限定。
基站12和UE11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，UE11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。
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13。
若干个基站12分别与网络管理设备13相连。其中，网络管理设备13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13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13的实现形态，本公开实施例不做限定。
对于非地面网络(NTN)系统中，有多种能够为卫星进行信息交互的UE。以下以甚小口径卫星终端站(Very Small Aperture Terminal，VAST)作为接入到NTN的UE为例进行举例说明。VSAT终端的接收机调整工作频点的时间可能需要十几秒到几十秒的时间，如果VSAT终端根据上述地面网络的小区切换流程对邻小区执行测量，VSAT需要花费十几秒到几十秒的时间调整它的接收机的工作频点执行邻小区测量，测量完成后再花费十几秒到几十秒的时间将它的接收机的工作频点调回到服务小区所对应的频点。而在这段时间内，VSAT已经丢失了服务小区的定时信息，从而可能导致UE与服务小区之前的失步。因此，地面网络传统的小区切换流程并不适用于非地面网络(NTN)系统中VSAT的小区切换。因此有必要引入适用于非地面网络(NTN)的切换流程，提升NTN系统中的切换性能。
如图2所示，本公开实施例提供一种小区切换方法，其中，应用于用户设备UE中，包括：
S110：响应于所述UE位于服务小区的边缘区域内，向NTN的接入设备发送边缘指示信息。
在本公开实施例中，该UE可为各种能够接入到NTN的NTN小区的终端，例如，所述UE可包括：甚小口径卫星终端站(Very Small Aperture Terminal，VAST)、个人地球站(Personal Earth Station，PEC)或者卫星小数据站(简称小站)。
在本公开实施例提供的触发UE进行小区切换的方法，UE会在确定自身位于服务小区的边缘区域内时，向NTN的接入设备发送边缘指示信息。
此处的NTN的接入设备包括但不限于：服务小区。该服务小区可为由卫星覆盖形成的小区。
在一个实施例中，该服务小区的卫星可为低轨(Low earth Orbit，LEO)卫星等与地球不同步的非同步卫星。
在一个实施例中，所述UE可以通过各种定位方式定位自身的位置信息，例如，通过定位卫星获得自身的位置信息，或者，通过基于NT网络的基站的三角定位等方式获得自身的位置信息，或者，利用重力加速度传感器等传感器定位自身的位置信息。
在一个实施例中，所述UE通过全球定位系统(Global Positioning System，GPS)定位得到自身的位置信息，和/或，通过全球导航卫星系统(Global Navigation Satellite System，GNSS)定位得到自身的位置信息。
UE可以根据自身的位置信息，确定自身是否位于自身的服务小区的边缘区域内。
服务小区的服务区域包括：中心区域和边缘区域。所述中心区域包含服务小区的小区中心；所述边缘区域位于所述中心区域的外围且不包含所述小区中心。所述小区中心又称之为中心位置。
在一个实施例中，所述服务小区下发了中心区域和/或边缘区域的区域信息，如此，UE在定位到自身的位置信息之后，就可以确定自身是否位于服务小区的边缘区域内。
通常情况下，UE的位置与服务小区的中心位置之间的距离越大，则说明UE越靠近服务小区的边缘，则UE位于服务小区的边缘区域的概率越大。相反，若UE的位置与服务小区的中心位置之间的距离越小，则说明UE越靠近服务小区的中心，则UE位于服务小区的中心区域的概率越大。由于UE位于服务小区的边缘才有切换小区的必要性，因此边缘指示信息是由UE位于服务小区的边缘区域时上报的。即若UE确定出自身位于服务小区的边缘区域内，就向服务小区的接入设备(包括但不限于卫星)发送边缘指示信息。该边缘指示信息指示UE当前位于服务小区的边缘区域内，如此，NTN的接入设备就会考虑是否需要出发UE进行NTN小区的切换。
在一个实施例中，所述边缘指示信息可包括至少一个显示指示的指示比特，该指示比特的比特值为预设值时为：UE向NTN指示自身位于当前服务小区的边缘区域内。
在另一个实施例中，所述边缘指示信息可由其他信令的信令格式或者与边缘指示信息具有任意对应关系的其他信息内容来隐性指示。
在一个实施例中，所述边缘指示信息可通过RRC信令上报，也可以通过上行控制信息(Uplink Control Imformation，UCI)上报。
可以理解地，所述边缘指示信息可单独包括：指示比特，指示所述UE位于边缘区域；该指示比特的个数可为1个或多个。
示例性地，所述边缘指示信息还可包括：位置信息，指示UE位于边缘区域的位置信息，该位置信息，可供网络侧核实UE是否确实位于服务小区的边缘区域内。
示例性地，若UE当前处于连接态，则可以通过RRC连接发送的RRC信令上报或者UCI。
在另一个实施例中，若UE当前处于空闲态或者非激活态，则可以通过寻呼响应来上报RRC恢复(Resume)信令上报。
在一个实施例中，所述边缘指示信息，可至少用于触发所述接入设备下发小区切换命令。
如此，UE就不用进行邻小区测量进行测量结果的上报，减少因为UE在邻小区测量过程中的与服务小区的失步现象，同时减少了小区切换的延时，且能够进一步减少因为切换不够及时导致的切入的小区服务通信质量比较差或者很快变差的现象。如图3所示，本公开实施例提供一种小区切换方法，可包括：
S100：响应于所述UE的位置与所述服务小区的中心位置之间的距离大于或等于门限值，确定所述UE位于所述服务小区的边缘区域内。
如图3所示，本公开实施例提供一种小区切换方法，可包括：：
S120：响应于所述UE的位置与所述服务小区的中心位置之间的距离小于所述门限值，确定所述UE位于服务小区的中心区域内。
该步骤S120可为与S110组合形成一个小区切换方法的一个方案，也可以独立与S110单独形成一个小区切换方法。
在本公开实施例中，利用UE的位置与服务小区的中心点之间的距离，来简化所述UE结合自身的位置是否位于服务小区的边缘区域内。
UE通过自身的位置与服务小区的小区中心之间的距离确定，可以用于确定自身是否位于服务小区的边缘区域内。
在另一个实施例中，所述UE还可以通过自身的位置与小区内其他位置的参考点之间的位置，确定出自身是否位于边缘区域内。例如，若UE确定出自身的位置与服务小区的多个边缘点中的至少一个边缘点之间的位置，小于或等于距离阈值，可认为自身位于服务小区的边缘区域内。
在一些实施例中，所述UE可以预先确定出边缘区域的区域信息，例如，根据区域信息就可以知晓边缘区域的范围，UE发现自身的位置位于区域信息指示的范围内，也可以确定自身位于服务小区的边缘区域。
所述UE的位置信息和服务小区的中心位置的位置信息都可以由经纬度指示，也可以是世界坐标系的坐标来指示。总之，所述UE的位置信息和所述服务小区的中心位置的位置信息的呈现方式有多种。
在一个实施例中，所述方法还包括：接收服务小区的所述门限值。
该门限值可以由NTN网络的下发的。例如，该门限值是被服务小区的广播、组播或者单播发送的。
例如，门限值可以携带在主消息快(Master Imformation Block，MIB)或者系统消息块(System Imformation Block，SIB)1中。
再例如，所述NTN网络可以针对某一个特定类型的UE发送组播消息，例如，针对VSAT或者PEC发送组播消息。该特定类型的UE包括但不限于：任意根据自身的位置是否位于服务小区的边 缘区域内的触发NTN下发小区切换命令的任意UE。
所述门限值可用于UE结合自身与中心位置等参考位置之间的距离，确定自身是否位于服务小区的边缘区域内。
在一个实施例中，所述响应于所述UE位于服务小区的边缘区域内，向NTN的接入设备发送边缘指示信息，包括：
响应于所述UE位于所述服务小区的边缘区域内且所述UE向背离所述服务小区的中心区域方向运动，向所述NTN的接入设备发送所述边缘指示信息。
若形成服务小区的卫星为非同步卫星，则卫星与UE之间是相对移动的，且卫星的移动速度远远大于UE的移动速度。
此时UE向背离服务小区的中心区域方向运动，UE即便不上报自身的移动信息，服务小区的卫星也能够根据自身相对于地球的运动，确定出可供UE接入的目标小区。
在一个实施例中，所述UE可以在确定出自身位于服务小区的边缘区域就上报边缘指示信息，为了减少不便要的上报，UE可以确定出自身相对于服务小区而言，是背向服务小区的中心区域的方向运动在上报所述边缘指示信息。
在一些实施例中，UE可以接收到卫星的星历信息，如此可以根据卫星的星历信息确定出形成当前服务小区的卫星的运动轨迹，从而确定出自身相对于服务小区而言，是面向服务小区的中心区域运动还是向边缘区域运动。若UE当前位于服务小区的边缘区域内，当时面向服务小区的中心区域运动时，则UE不上报所述边缘指示信息。因此，UE仅在确定出自身位于当前服务小区的边缘区域且背向服务小区的中心区域运动的情况下，上报所述边缘指示信息。
UE确定自身是否服务小区的中心区域运动或者背向服务小区的中心区域运动的方式有多种，一种是结合两个时刻，自身的位置信息与服务小区的中心位置之间的距离来确定。
示例性地，所述UE向背离所述服务小区的中心区域方向运动，包括：
所述UE在第t-m时刻的位置与所述服务小区的中心位置之间的距离，小于所述UE在第t时刻的位置与所述服务小区的中心位置之间的距离，其中，所述t为大于或等于m正整数；所述m为正整数。
UE可以周期性确定根据自身的位置信息和服务小区的中心位置的之间距离，若m等于1，则即若两个相邻时刻，UE的位置信息与服务小区的中心位置之间的距离增大，则说明UE正在远离所述服务小区的区域中心。
在一个实施例中，所述m的取值还可为2或3，具体的取值范围，所述m可为1到10之间的任意取值。在一个实施例中，所述m的取值可以根据UE的移动速度来确定，若UE的移动速度可与所述m的取值负相关。
在另一个实施例中，所述UE还可以根据服务小区的卫星的星历信息，确定出所述卫星的运动方向，根据该运动方向确定自身是否向背离服务小区的中心区域的方向运动。
在还有一个实施例中，所述UE结合服务小区的卫星的星历信息和自身的移动信息，精确的确 定出自身是否背向服务小区的中心位置的运动方向。
在一个实施例中，所述方法还包括：
根据所述服务小区的卫星的星历信息，确定所述服务小区的中心位置。
在一个实施例中，所述UE可以接收服务小区的发送的星历信息，根据星历信息可以计算出任意时刻服务小区的中心位置。
在另一个实施例中，所述UE可以周期性从服务小区接收所述服务小区的中心位置。
所述UE获取所述服务小区的中心位置的方式有很多种，不限于上述任意一种。
在一个实施例中，所述方法还包括：
接收所述小区切换命令；
响应于接收到小区切换命令，切换到目标小区。
UE上报边缘指示信息之后，且NTN侧确认UE需要切换小区，就会向UE下发小区切换命令。UE在接收到小区切换命令之后，会执行服务小区的切换，将服务小区从源小区切换到目标小区。
在进行服务小区的切换时，UE会释放与源小区的链路和资源，并请求接入到目标小区，与目标小区同步并建立连接。
示例性地，UE与目标小区进行下行同步之后，通过随机接入消息的接入到目标小区。
所述小区切换命令携带有所述UE连接到目标小区的同步配置信息和RRC重配置信息。
所述UE接收到小区切换命令之后，根据所述同步配置信息，与目标小区进行同步。所述RRC重配置信息，用于UE进行无线资源重配置。在UE与目标小区同步和/或完成所述RRC重配置之后，发起随机接入。
如图4所示，本公开实施例提供一种小区切换方法，其中，应用于非地面网络NTN的接入设备中，包括：
S210：接收用户设备UE上报的边缘指示信息；
S220：根据所述边缘指示信息，向小区切换的目标小区发送切换请求消息；
S230：根据所述切换请求消息的应答消息，向所述UE发送小区切换命令。
在本公开实施例中，该小区接入方法是用于NTN的接入设备可为卫星等。所述UE可为前述VAST或者PES等。
示例性地，该边缘指示信息，指示上报的UE位于服务小区的边缘区域内。即所述边缘指示信息可为：UE在服务小区的边缘区域内时上报的。
在本公开实施例中，若接入设备接收到边缘指示信息之后，可以直接向目标小区发送切换请求信息。
示例性地，若所述边缘指示信息为：UE在确定出自身位于服务小区的边缘区域且确定UE向背离服务小区的中心区域方向移动发送的，则NTN的接入设备在接收到所述边缘指示信息之后，可直接向目标小区的卫星发送所述切换请求消息。
又一个示例，若边缘指示信息为：UE在确定出自身位于服务小区的边缘区域时上报的，服务小 区的卫星根据自身的星历信息确定出自身与UE之间的距离越来越大，即服务小区的中心区域与UE之间的距离朝着变大的方向变动，则向目标小区发送所述切换请求消息，否则可以不向目标小区发送切换请求消息。
在一个实施例中，NTN的接入设备接收到边缘指示信息之后，可以根据NTN的多个卫星的相对位置信息和/或星历信息，确定出待UE接入的目标小区。
目标小区接收到切换请求消息之后，若允许UE接入则会进行UE的接入控制和/或切换准备。
目标小区同意UE的接入，则会基于所述切换请求消息向服务小区返回指示确认的应答消息。例如，该应答消息携带有确认字符(Acknowledgement character，ACK)。
若目标小区接收到应答消息之后，确定目标小区已经预备好供UE接入，此时就可以向UE发送小区切换命令；通过小区切换命令，触发UE将服务小区从当前小区(即源小区)切换到目标小区。
在本公开实施例中，服务小区接收的不再是UE上报对本小区和/或邻小区的参考信号的信号质量等生成的测量报告，而是UE确定出自身在服务小区的边缘区域内时上报的边缘指示信息。
在一个实施例中，所述应答消息以无线资源控制RRC容器方式携带有所述小区切换命令。
若应答消息携带有RRC容器(Container)封装的小区切换命令，则服务小区可以直接将小区切换命令透传给UE。透传是指：在消息的发送端和接收端之间的中转节点，在不解析发送端所发送的内容的情况下，直接转发给接收端。示例性地，服务小区将小区切换命令透传给UE为：服务小区将目标小区发送的小区切换命令在不解析小区切换命令的情况下，直接发送给UE。
例如，在应答消息具有至少一个比特，该指示比特用于携带ACK或者否认字符(Non Acknowledgement character，NACK)。服务小区解码该比特，确定应答消息携带的是ACK，则将该应答消息携带的小区切换命令透传给UE，否则可以停止解码应答消息的剩余比特。若指示比特携带的是NACK，则服务小区可以停止解码该应答消息的剩余比特。与此同时，接入设备可以不会向UE发送小区切换命令，或者向UE发送拒绝切换命令。
在一个实施例中，所述S230可包括：将所述应答消息携带的小区切换命令，发送给所述UE。
示例性地，该小区切换命令是目标小区生成的。
在一个实施例中，所述UE位于服务小区的边缘区域内包括：所述UE的位置与服务小区的中心位置之间的距离大于或等于门限值。
使用服务小区的中心位置来供UE确定是否位于服务小区的边缘区域内，具有UE的计算简单的特点。
在一个实施例中，所述方法还包括：
发送所述门限值。
发送该门限值可包括：
直接发送该门限值的数值及发送该门限值的索引等方式中一个或多个。
网络侧可以通过广播消息、组播消息或者单播消息来发送该门限值。示例性地，NTN的接入设备通过MIB和/或SIB1等广播所述门限值，或者，通过RRC消息和/或MAC CE发送所述门限值。
在一个实施例中，所述发送所述边缘门限的指示信息，包括：根据所述服务小区的小区面积，发送所述门限值。
服务小区的小区面积不同，则门限值不同。示例性地，服务小区的小区面积与所述门限值正相关，即所述服务小区的小区面积越大，则所述门限值越大。又示例性地，所述服务小区的内径与所述门限值正相关，例如，服务小区的内径越大，则所述门限值越大。且通常服务小区的内径与服务小区的面积正相关。
在一个实施例中，所述小区切换命令携带有所述UE连接到目标小区的同步配置信息和RRC重配置信息。
该同步配置信息，可用于UE与目标小区的同步；该RRC重配置信息，可用于UE进行无线资源的重配置；重配置后的无线资源为目标小区的无线资源。如图5所示，本公开实施例提供一种小区切换装置，其中，应用于用户设备UE中，包括：
第一发送模块510，被配置为响应于所述UE位于服务小区的边缘区域内，向NTN的接入设备发送边缘指示信息。
在一个实施例中，所述第一发送模块510包括但不限于：程序模块；所述程序模块被处理器执行惠州，能够在UE位于服务小区的边缘区域时上报所述边缘指示信息。
在另一个实施例中，所述第一发送模块510可为软硬结合模块；所述软硬结合模块包括但不限于：可编程阵列；所述可编程阵列包括但不限于：现场可编程阵列和/或复杂可编程阵列。
在还有一个实施例中，所述第一发送模块510可包括纯硬件模块；所述纯硬件模块包括但不限于：专用集成电路。
在一个实施例中，所述边缘指示信息，用于触发所述接入设备下发小区切换命令。
在一个实施例中，所述装置还包括：
第一确定模块，被配置为响应于所述UE的位置与所述服务小区的中心位置之间的距离大于或等于门限值，确定所述UE位于所述服务小区的边缘区域内。
在一个实施例中，所述装置还包括：第一接收模块，被配置为接收服务小区的所述门限值。
在一个实施例中，所述第一发送模块510，被配置为响应于所述UE位于所述服务小区的边缘区域内且所述UE向背离所述服务小区的中心区域方向运动，向所述NTN的接入设备发送所述边缘指示信息。
在一个实施例中，所述UE向背离所述服务小区的中心区域方向运动，包括：
所述UE在第t-m时刻的位置与所述服务小区的中心位置之间的距离，小于所述UE在第t时刻的位置与所述服务小区的中心位置之间的距离，其中，所述t为大于或等于m正整数；所述m为正整数。
在一个实施例中，所述装置还包括：
第二确定模块，被配置为根据所述服务小区的卫星的星历信息，确定所述服务小区的中心位置。
在一个实施例中，所述装置还包括：
第二接收模块，被配置为接收所述小区切换命令；以及，
切换模块，被配置为响应于接收到所述小区切换命令，切换到目标小区。
如图6所示，本公开实施例提供一种小区切换装置，其中，应用于非地面网络NTN的接入设备中，包括：
第三接收模块610，被配置为接收用户设备UE上报的边缘指示信息；示例性地，第三接收模块610可被配置为接收UE位于服务小区的边缘区域内时上报的所述边缘指示信息；
第二发送模块620，被配置为根据所述边缘指示信息，向小区切换的目标小区发送切换请求消息；
第三发送模块630，被配置为根据所述切换请求消息的应答消息，向所述UE发送小区切换命令。
在一个实施例中，所述第三接收模块610、所述第二发送模块620及所述第三发送模块630可均为程序模块；所述程序模块被处理器执行之后，能够实现边缘指示信息的接收、小区切换请求消息的发送和所述应答消息发送小区切换命令。
在另一个实施例中，所述第三接收模块610、所述第二发送模块620及所述第三发送模块630可均为软硬结合模块；所述软硬结合模块包括但不限于：可编程阵列。所述可编程阵列包括但不限于：复杂可编程阵列和/或现场可编程阵列。
在还有一个实施例中，所述第三接收模块610、所述第二发送模块620及所述第三发送模块630可均为纯硬件模块；所述纯硬件模块包括但不限于专用集成电路。
在一个实施例中，所述应答消息以无线资源控制RRC容器方式携带有所述小区切换命令；
所述第三发送模块630，被配置为将所述应答消息携带的小区切换命令，发送给所述UE。
在一个实施例中，所述UE位于服务小区的边缘区域内包括：所述UE的位置与服务小区的中心位置之间的距离大于或等于门限值。
在一个实施例中，所述第三发送模块630，被配置为发送所述门限值。
在一个实施例中，所述第三发送模块630，被配置为根据所述服务小区的小区面积，发送所述边缘门限的指示信息。
在一个实施例中，所述小区切换命令携带有所述UE连接到目标小区的同步配置信息和RRC重配置信息。
本公开实施例给出一种适用于NTN系统的小区切换方法。
为了便于描述，以步骤形式说明，实际顺序不必完全按照描述的先后。
第1步：支持GNSS定位的终端UE通过GNSS定位获取的当前位置信息，终端UE通过获取卫星的星历信息计算出它和该卫星所覆盖的小区的中心位置的距离ΔD＝P 1-P 2，其中P为终端UE当前的实时位置信息，P 2为UE根据获取的卫星星历信息实时计算出的卫星所覆盖小区的中心位置；
第2步：源服务小区根据卫星所覆盖地面的小区大小配置小区边缘的门限值D Thres
第3步：当UE与源服务小区中心位置的距离ΔD≥D Thres且t时刻(例如，当前时刻)UE与服务小区的中心位置的距离ΔD t，大于t-1(例如，上一时刻)UE与源服务小区中心位置的距离ΔD t-1时(即ΔD t>ΔD t-1)，则UE向服务小区上报UE处于小区边缘的指示信息；此处的小区边缘可对应于前述的边缘区域。
第4步：服务小区收到小区边缘指示信令后，服务小区向目标小区发送切换请求消息，该目标小区为下一个卫星即将覆盖该UE所对应的小区。目标小区收到切换请求命令后进行接纳控制和切换准备。同时向源小区发送切换请求应答消息(ACK)，其中向终端发送的切换命令以RRC容器(container)的方式包含在应答消息中。
第5步：源小区触发空口切换，将切换命令发送给终端UE。该切换命令可由目标小区生成，包含带有同步配置消息的RRC重配信息。此处的源小区即为UE当前的服务小区。
第6步：终端接收到切换命令后，执行与目标小区的同步并发起随机接入。
本公开实施例给出一种适用于NTN系统的小区切换方法，可以有效解决在NTN系统中，可解决基于地面小区切换机制，VSAT在测量邻小区后与服务小区失步的问题，可以提高在NTN系统下的小区切换性能，提升系统吞吐量性能。
本公开实施例提供一种通信设备，包括：
用于存储处理器可执行指令的存储器；
处理器，分别存储器连接；
其中，处理器被配置为执行前述任意技术方案提供的小区切换方法。
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。
这里，所述通信设备包括NTN的接入设备或UE。
所述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，例如，如图2至图4所示的方法的至少其中之一。
图7是根据一示例性实施例示出的一种UE(UE)800的框图。例如，UE800可以是移动电话，计算机，数字广播用户设备，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7，UE800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UE800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UE800的操作。这些数据的示例包括用于在UE800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UE800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UE800生成、管理和分配电力相关联的组件。
多媒体组件808包括在所述UE800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。所述触摸传感器可以不仅感测触摸或滑动动作的边界，而且还检测与所述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UE800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UE800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UE800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，例如所述组件为UE800的显示器和小键盘，传感器组件814还可以检测UE800或UE800一个组件的位置改变，用户与UE800接触的存在或不存在，UE800方位或加速/减速和UE800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UE800和其他设备之间有线或无线方式的通信。UE800可以接入基于通信标准的无线网络，如WiFi，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，所述通信组件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，UE800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UE800的处理器820执行以完成上述方法。例如，所述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8所示，本公开一实施例示出一种接入设备的结构。例如，接入设备900可以被提供为一网络侧设备，例如网络侧设备中的卫星。参照图8，接入设备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接入设备的任意方法，例如，如图2至图4所示方法。
接入设备900还可以包括一个电源组件926被配置为执行接入设备900的电源管理，一个有线或无线网络接口950被配置为将接入设备900连接到网络，和一个输入输出(I/O)接口958。接入设备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，将容易想到本公开实施例的其它实施方案。本公开旨在涵盖本公开实施例的任何变型、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公开实施例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，本公开实施例的真正范围和精神由下面的权利要求指出。
应当理解的是，本公开实施例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。本公开实施例的范围仅由所附的权利要求来限制。

Claims (28)

  1. 一种小区切换方法，其中，应用于用户设备UE中，包括：
    响应于所述UE位于服务小区的边缘区域内，向NTN的接入设备发送边缘指示信息。
  2. 根据权利要求1所述的方法，其中，所述方法还包括：
    响应于所述UE的位置与所述服务小区的中心位置之间的距离大于或等于门限值，确定所述UE位于所述服务小区的边缘区域内。
  3. 根据权利要求2所述的方法，其中，所述方法还包括：
    接收服务小区的所述门限值。
  4. 根据权利要求1至3任一项所述的方法，其中，所述响应于所述UE位于服务小区的边缘区域内，向NTN的接入设备发送边缘指示信息，包括：
    响应于所述UE位于所述服务小区的边缘区域内且所述UE向背离所述服务小区的中心区域方向运动，向所述NTN的接入设备发送所述边缘指示信息。
  5. 根据权利要求4所述的方法，其中，所述UE向背离所述服务小区的中心区域方向运动，包括：
    所述UE在第t-m时刻的位置与所述服务小区的中心位置之间的距离，小于所述UE在第t时刻的位置与所述服务小区的中心位置之间的距离，其中，所述t为大于或等于m的正整数；所述m为正整数。
  6. 根据权利要求2至5任一项所述的方法，其中，所述方法还包括：
    根据所述服务小区的卫星的星历信息，确定所述服务小区的中心位置。
  7. 根据权利要求1所述的方法，其中，所述方法还包括：
    接收所述小区切换命令；以及
    响应于接收到所述小区切换命令，切换到目标小区。
  8. 一种小区切换方法，其中，应用于非地面网络NTN的接入设备中，包括：
    接收用户设备UE上报的边缘指示信息；
    根据所述边缘指示信息，向小区切换的目标小区发送切换请求消息；
    根据所述切换请求消息的应答消息，向所述UE发送小区切换命令。
  9. 根据权利要求8所述的方法，其中，所述应答消息以无线资源控制RRC容器方式携带有所述小区切换命令；
    所述根据所述切换请求消息的应答消息，向所述UE发送小区切换命令，包括：
    将所述应答消息携带的小区切换命令，发送给所述UE。
  10. 根据权利要求8或9所述的方法，其中，所述UE位于服务小区的边缘区域内包括：所述UE的位置与服务小区的中心位置之间的位置大于或等于门限值。
  11. 根据权利要求10所述的方法，其中，所述方法还包括：
    发送所述门限值。
  12. 根据权利要求11所述的方法，其中，所述发送所述边缘门限的指示信息，包括：
    根据所述服务小区的小区面积，发送所述门限值。
  13. 根据权利要求9至12任一项所述的方法，其中，所述小区切换命令携带有所述UE连接到目标小区的同步配置信息和RRC重配置信息。
  14. 一种小区切换装置，其中，应用于用户设备UE中，包括：
    第一发送模块，被配置为响应于所述UE位于服务小区的边缘区域内，向NTN的接入设备发送边缘指示信息。
  15. 根据权利要求14所述的装置，其中，所述装置还包括：
    第一确定模块，被配置为响应于所述UE的位置与所述服务小区的中心位置之间的距离大于或等于门限值，确定所述UE位于所述服务小区的边缘区域内。
  16. 根据权利要求15所述的装置，其中，所述装置还包括：
    第一接收模块，被配置为接收服务小区的所述门限值。
  17. 根据权利要求14至16任一项所述的装置，其中，所述第一发送模块，被配置为响应于所述UE位于所述服务小区的边缘区域内且所述UE向背离所述服务小区的中心区域方向运动，向所述NTN的接入设备发送所述边缘指示信息。
  18. 根据权利要求17所述的装置，其中，所述UE向背离所述服务小区的中心区域方向运动，包括：
    所述UE在第t-m时刻的位置与所述服务小区的中心位置之间的距离，小于所述UE在第t时刻的位置与所述服务小区的中心位置之间的距离，其中，所述t为大于或等于m的正整数；所述m为正整数。
  19. 根据权利要求15至18任一项所述的装置，其中，所述装置还包括：
    第二确定模块，被配置为根据所述服务小区的卫星的星历信息，确定所述服务小区的中心位置。
  20. 根据权利要求14所述的装置，其中，所述装置还包括：
    第二接收模块，被配置为接收所述小区切换命令；以及
    切换模块，被配置为响应于接收到所述小区切换命令，切换到目标小区。
  21. 一种小区切换装置，其中，应用于非地面网络NTN的接入设备中，包括：
    第三接收模块，被配置为接收用户设备UE上报的边缘指示信息；
    第二发送模块，被配置为根据所述边缘指示信息，向小区切换的目标小区发送切换请求消息；
    第三发送模块，被配置为根据所述切换请求消息的应答消息，向所述UE发送小区切换命令。
  22. 根据权利要求21所述的装置，其中，所述应答消息以无线资源控制RRC容器方式携带有所述小区切换命令；
    所述第三发送模块，被配置为将所述应答消息携带的小区切换命令，发送给所述UE。
  23. 根据权利要求21或22所述的装置，其中，所述UE位于服务小区的边缘区域内包括：所 述UE的位置与服务小区的中心位置之间的距离大于门限值。
  24. 根据权利要求23所述的装置，其中，所述第三发送模块，被配置为发送所述门限值。
  25. 根据权利要求24所述的装置，其中，所述第三发送模块，被配置为根据所述服务小区的小区面积，发送所述边缘门限的指示信息。
  26. 根据权利要求21至25任一项所述的装置，其中，所述小区切换命令携带有所述UE连接到目标小区的同步配置信息和RRC重配置信息。
  27. 一种通信设备，包括处理器、收发器、存储器及存储在存储器上并能够有所述处理器运行的可执行程序，其中，所述处理器运行所述可执行程序时执行如权利要求1至7或8至13任一项提供的小区切换方法。
  28. 一种计算机存储介质，所述计算机存储介质存储有可执行程序；所述可执行程序被处理器执行后，能够实现如权利要求1至7或8至13任一项提供的小区切换方法。
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