WO2022027200A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2022027200A1
WO2022027200A1 PCT/CN2020/106663 CN2020106663W WO2022027200A1 WO 2022027200 A1 WO2022027200 A1 WO 2022027200A1 CN 2020106663 W CN2020106663 W CN 2020106663W WO 2022027200 A1 WO2022027200 A1 WO 2022027200A1
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WIPO (PCT)
Prior art keywords
cell
network device
plmn
terminal device
information
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PCT/CN2020/106663
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English (en)
French (fr)
Inventor
耿婷婷
吴烨丹
严乐
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2020/106663 priority Critical patent/WO2022027200A1/zh
Priority to EP20948080.5A priority patent/EP4185006A4/en
Priority to CN202080104856.7A priority patent/CN116250277A/zh
Publication of WO2022027200A1 publication Critical patent/WO2022027200A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H04W36/0094—Definition of hand-off measurement parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • 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
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a communication method and apparatus.
  • Non-terrestrial networks (NTN) communication systems provide seamless coverage for terminal equipment by deploying the functions of access network equipment or part of access network equipment on non-terrestrial equipment such as high-altitude platforms or satellites. Or the satellite is located in the high sky and is less affected by natural disasters, therefore, the reliability of the NTN communication system is high.
  • NTN Non-terrestrial networks
  • NTN communication system Another important feature of the NTN communication system is that the coverage of an NTN cell is usually relatively large. For example, the coverage diameter of the cell can reach tens to thousands of kilometers. Therefore, there will be an NTN cell that covers the geographic areas of multiple countries or covers multiple countries. the service area of each operator.
  • a satellite can indicate that it can support services of multiple countries or operators by broadcasting information of multiple public land mobile networks (PLMN).
  • PLMN public land mobile networks
  • the terminal device can receive the satellite signal and report the measurement result based on the received signal, so that the network can make a handover decision based on the measurement result reported by the terminal device.
  • the communication strategies corresponding to different PLMNs are different.
  • the handover to the target cell is performed only according to the cell measurement results reported by the terminal equipment.
  • the communication behavior of the terminal device cannot meet the communication policy requirements of the PLMN it requests to access, which in turn causes the handover process to fail and affects the communication performance.
  • a communication method and apparatus in the embodiments of the present application are used for, when a target cell is an NTN cell supporting multiple PLMNs, so that a terminal device can switch/access to the target cell from a PLMN that matches its location, so as to satisfy the The corresponding communication policy requirements.
  • an embodiment of the present application provides a communication method.
  • the method can be executed by a first network device, and can also be executed by a component (for example, a chip or a circuit) configured in the first network device.
  • a component for example, a chip or a circuit
  • the method may include: the first network device sends a first request message to the second network device, where the first request message is used to request the terminal device to access the second cell under the second network device, the first request message includes Location information of the terminal device and information of the first PLMN, where the first PLMN is the target PLMN accessed by the terminal device determined by the first network device; the first network device receives the first response message from the second network device, the first PLMN is The response message includes information of the second PLMN, which is the PLMN that the second network device allows the terminal device to access; wherein, the location of the terminal device is located outside the first area corresponding to the first PLMN, and is located in the second PLMN Within the corresponding second area, the first PLMN and the second PLMN are both PLMNs supported by the second network device.
  • the first network device can provide the second network device with the location information of the terminal device, so that the target network device can determine the request of the terminal device according to the location information of the terminal device.
  • the accessed PLMN is reasonable, so as to prevent the terminal equipment from accessing from countries/operators other than its location, and ensure that the communication behavior of the terminal equipment in the NTN cell can conform to the communication policy of the country/operator to which its location belongs.
  • the method further includes: the first network device receives second indication information from the terminal device or the second network device, where the second indication information is used to indicate that the second cell is an NTN cell, Alternatively, the second indication information is used to indicate that the second cell is an NTN cell and the number of PLMNs supported by the second cell is at least two.
  • the method further includes: the first network device receives cell information of the second cell from the terminal device or the second network device, where the cell information of the second cell includes the second cell support information of at least two PLMNs, the at least two PLMNs include a first PLMN and a second PLMN.
  • the first response message further includes second indication information, where the second indication information is used to indicate that the location where the terminal device is located does not match the first PLMN requested to access .
  • the method further includes: the first network device sends third indication information to the terminal device, where the third indication information is used to instruct the terminal device to report the measurement result of the second cell It carries the location information of the terminal device.
  • the sending of the first request message by the first network device to the second network device may specifically include: the first network device sends the first request message to the second network device through the core network device.
  • the first network device receiving the first response message from the second network device may specifically include: the first network device receiving the first response message from the second network device from the core network device.
  • an embodiment of the present application provides a communication method, which can be executed by a second network device or by a component (for example, a chip or a circuit) configured in the second network device.
  • a component for example, a chip or a circuit
  • the method may include: the second network device receives a first request message from the first network device, where the first request message is used to request the terminal device to access a cell under the second network device, the first request message includes The location information of the terminal device and the information of the first PLMN, the first PLMN is the target PLMN accessed by the terminal device determined by the first network device; if the location of the terminal device is located outside the first area corresponding to the first PLMN, and is located within the second area corresponding to the second PLMN, the second network device determines the second PLMN as the target PLMN that the terminal device is allowed to access, and the first PLMN and the second PLMN are both PLMNs supported by the second network device .
  • the method further includes: the second network device sends first indication information to the first network device, where the first indication information is used to indicate that the second cell is an NTN cell, or the first indication information is The second indication information is used when the second cell is an NTN cell and the number of PLMNs supported by the second cell is at least two.
  • the method further includes: the second network device sends cell information of the second cell to the first network device, where the cell information of the second cell includes at least the cell information supported by the second cell.
  • Information of two PLMNs, the at least two PLMNs include a first PLMN and a second PLMN.
  • the first response message further includes second indication information, where the second indication information is used to indicate that the location where the terminal device is located does not match the first PLMN requested to access.
  • the second network device receiving the first request message from the first network device may specifically include: the second network device receiving the first request message from the first network device from the core network device .
  • the sending of the first response message by the second network device to the first network device may specifically include: the second network device sends the first response message to the first network device through the core network device.
  • an embodiment of the present application provides a communication method, which can be executed by a terminal device or by a component (such as a chip or circuit) configured in the terminal device.
  • a component such as a chip or circuit configured in the terminal device.
  • the terminal device will be used as the The implementation of this method is described as an example.
  • the method may include: the terminal device receiving third indication information from the first network device, where the third indication information is used to instruct the terminal device to carry the location information of the terminal device when reporting the measurement result of the second cell, the second cell is a cell under the second network device; the terminal device sends a measurement report to the first network device, where the measurement report includes the location information of the terminal device.
  • the method further includes: the terminal device sends first indication information to the first network device, where the first indication information is used to indicate that the second cell is an NTN cell, or the first indication information The indication information is used to indicate that the second cell is an NTN cell and the number of PLMNs supported by the second cell is at least two.
  • the method further includes: the terminal device sends cell information of the second cell to the first network device, where the cell information of the second cell includes at least two PLMNs supported by the second cell Information.
  • an embodiment of the present application provides a communication apparatus, and the apparatus may also have the function of implementing the first network device in the first aspect or any possible design of the first aspect, or have the function of implementing the second aspect. or the function of the second network device in any possible design of the second aspect.
  • the apparatus may be a network device or a chip included in the network device.
  • the apparatus has the function of implementing the terminal device in any possible design of the third aspect or the third aspect, or has the function of implementing the first network device in the fourth aspect or any possible design of the fourth aspect.
  • the apparatus may be a terminal device or a chip included in the terminal device.
  • the functions of the above communication apparatus may be implemented by hardware, or by executing corresponding software in hardware, and the hardware or software includes one or more modules or units or means corresponding to the above functions.
  • the structure of the apparatus includes a processing module and a transceiver module, wherein the processing module is configured to support the apparatus to perform the first aspect or the corresponding first network device in any design of the first aspect. function, or perform the corresponding function of the second network device in the above-mentioned second aspect or any design of the second aspect, or perform the corresponding function of the terminal device in the above-mentioned third aspect or any possible design of the third aspect .
  • the transceiver module is used to support communication between the device and other communication devices. For example, when the device is a first network device, it can send a first request message to a second network device and receive a first response message from the second network device. .
  • the communication device may also include a storage module, which is coupled to the processing module and stores necessary program instructions and data of the device.
  • the processing module may be a processor
  • the transceiver module may be a transceiver
  • the storage module may be a memory.
  • the memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the structure of the apparatus includes a processor and may also include a memory.
  • the processor is coupled to the memory and can be used to execute computer program instructions stored in the memory to cause the apparatus to perform the method in the first aspect or any possible design of the first aspect above, or the second aspect or the second aspect above The method in any possible design of the above-mentioned third aspect or the method in any possible design of the third aspect is performed.
  • the apparatus further includes a communication interface to which the processor is coupled.
  • the communication interface can be a transceiver or an input/output interface; when the device is a chip included in the network device or terminal device, the communication interface can be an input/output interface of the chip.
  • the transceiver may be a transceiver circuit, and the input/output interface may be an input/output circuit.
  • an embodiment of the present application provides a chip system, including: a processor, where the processor is coupled to a memory, and the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor , so that the chip system implements the above-mentioned first aspect or the method in any possible design of the first aspect, or realizes the above-mentioned second aspect or the method in any possible design of the second aspect, or realizes the above-mentioned first aspect.
  • the method in the three aspects or any possible design of the third aspect.
  • the chip system further includes an interface circuit, and the interface circuit is used to exchange code instructions to the processor.
  • processors in the chip system, and the processors may be implemented by hardware or software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor implemented by reading software codes stored in memory.
  • the memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory can be a non-transitory processor, such as a read-only memory ROM, which can be integrated with the processor on the same chip, or can be provided on different chips.
  • the setting method of the processor is not particularly limited.
  • an embodiment of the present application provides a computer-readable storage medium on which a computer program or instruction is stored, and when the computer program or instruction is executed, causes the computer to execute the first aspect or any one of the first aspects.
  • an embodiment of the present application provides a computer program product that, when a computer reads and executes the computer program product, causes the computer to execute the method in the first aspect or any possible design of the first aspect, Or execute the method in the second aspect or any possible design of the second aspect, or execute the method in the third aspect or any possible design of the third aspect.
  • an embodiment of the present application provides a communication system, where the communication system includes the first network device, the second network device, and at least one terminal device described in the above aspects, where the first network device may be a source network device , the second network device may be the target network device.
  • the communication system may further include core network equipment.
  • FIG. 1a and 1b are schematic diagrams of the network architecture of a satellite communication system to which the embodiments of the application are applicable;
  • FIG. 2 is a schematic diagram of different PLMNs corresponding to different areas covered by a satellite cell in an embodiment of the present application
  • FIG. 3 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of the first network device determining that the second cell is an NTN cell, or determining that the second cell is an NTN cell and at least two PLMNs in the second cell in an embodiment of the present application;
  • FIG. 5 is an example of a communication method provided by an embodiment of the present application.
  • FIG. 6 is another example of a communication method provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of each neighboring cell of a first cell in an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a first network device instructing a terminal device to report location information in an embodiment of the present application
  • FIG. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 10 is another schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • FIG. 12 is another schematic structural diagram of another communication apparatus provided by an embodiment of the present application.
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio General packet radio service
  • LTE LTE system
  • FDD frequency division duplex
  • TDD LTE time division duplex
  • UMTS universal mobile telecommunication system
  • 5G 5th generation
  • the technical solutions provided in the embodiments of the present application may be applied to a non-terrestrial network (NTN) communication system, and may also be applied to a mixed deployment scenario of NTN and terrestrial networks (terrestrial networks, TN).
  • NTN non-terrestrial network
  • TN terrestrial networks
  • the NTN communication system may include a satellite communication system, a high altitude platform station (HAPS) communication system, or other non-terrestrial communication systems.
  • HAPS high altitude platform station
  • the following takes the NTN communication system as a satellite communication system as an example to describe the network architecture applied in the present application in detail.
  • FIG. 1a is a schematic diagram of a network architecture of a satellite communication system to which the embodiments of the present application are applied.
  • the network architecture includes a core network device 110, a radio access network device 120, a satellite 130, and at least one terminal device (as shown in FIG. 1a ).
  • the core network equipment, radio access network equipment and terminal equipment in FIG. 1a are located on the ground, and the satellites are located in the high sky.
  • the wireless access network equipment communicates with the core network equipment in a wireless or wired manner.
  • the core network device and the radio access network device can be independent and different physical devices, or the functions of the core network device and the logical functions of the radio access network device can be integrated on the same physical device, or they can be one physical device. It integrates the functions of some core network equipment and some functions of the wireless access network equipment.
  • the wireless access network devices mentioned in the embodiments of the present application may correspond to different devices in different communication systems, for example, the 5G system corresponds to the 5G access network devices, such as gNB or ng-eNB, The 4G system corresponds to the access network equipment in 4G, such as eNB or en-gNB.
  • the communication between the wireless access network equipment and the terminal equipment transmits signals through satellites, that is, the satellite can receive the signals of the wireless access network equipment and forward the signals to the ground to form a satellite cell, thereby providing service coverage for the terminal equipment on the ground.
  • the satellite is equivalent to a relay node or transponder, so this scenario can also be called a transparent form of the satellite.
  • the satellite cell can be fixed on the ground (can be marked as “fixed cell”), or it can move on the ground with the movement of the satellite (can be marked as “mobile cell”).
  • the satellite cell is fixed on the ground, which means that the coverage of the satellite cell on the ground is fixed, either for a period of time or permanently.
  • the satellite cell formed by it is generally also fixed relative to the ground.
  • the satellite can adjust the launch angle of its antenna or other physical parameters, so that the formed satellite cell is fixed relative to the ground.
  • the satellite cell moves with the movement of the satellite, that is, when the satellite moves, the satellite cell also follows the satellite to move on the ground.
  • the reason for the mobile cell is that the satellite does not dynamically adjust the direction of the beam as the satellite moves, so that the projection of the beam generated by the satellite on the ground moves with the movement of the satellite.
  • a possible mobile cell existence scenario may be: the satellite establishes a connection with the original wireless access network equipment, and as the satellite moves, the original wireless access network equipment forwarded by the satellite is connected to the The cell moves with the satellite for a period of time, that is, the satellite maintains a connection with the original wireless access network equipment for a period of time; at a certain moment, the connection between the satellite and the original wireless access network equipment is interrupted due to the long distance and weak signal.
  • the satellite is connected to a new wireless access network device, after that, the satellite starts to forward the signal of the new wireless access network device to form a new satellite cell.
  • the moving range of the satellite cell is usually around the periphery of the radio access network device.
  • FIG. 1b is a schematic diagram of another network architecture of a satellite communication system to which the embodiments of the present application are applied
  • the network architecture includes a core network device 110, a satellite 130, and at least one terminal device (the terminal device shown in FIG. 1b). 140).
  • the core network equipment and terminal equipment in Fig. 1b are located on the ground, while the satellites are located high in the sky.
  • a radio access network device such as a base station
  • the satellite can generate the cell signal by itself and forward it to the ground to form a satellite cell, thereby providing service coverage for the terminal equipment on the ground. Therefore, this scenario may also be referred to as a regenerative form of the satellite.
  • the satellite cell moves with the movement of the satellite, that is, when the satellite moves, the cell generated by it also moves on the ground, so it can be called a "moving cell". Since the “mobile cell” is generated by the satellite itself, the satellite “mobile cell” can move on the ground following the orbit of the satellite. Under normal circumstances, when a satellite is removed, new satellites will be moved over to ensure continuous coverage as much as possible. The coverage area of the new satellite and the previous satellite can be the same or different. It can be understood that the ground coverage areas of the two satellites may not necessarily be exactly the same due to differences in the satellite's running direction, beam launch direction, and beam launch capability.
  • one radio access network device or satellite or core network device may provide services for one or more terminal devices, and the embodiments of the present application may provide services for the satellite communication
  • the number of core network devices, wireless access network devices, satellites and terminal devices included in the system is not limited.
  • the terminal device may be fixed or movable, which is not limited in this application.
  • the wireless access network equipment and the terminal equipment and between the terminal equipment and the terminal equipment can communicate through the licensed spectrum (licensed spectrum), can also communicate through the unlicensed spectrum (unlicensed spectrum), and can also communicate through the licensed spectrum and unlicensed spectrum for communications.
  • the radio access network equipment and the terminal equipment and between the terminal equipment and the terminal equipment can communicate through the frequency spectrum below 6 gigahertz (gigahertz, GHz), and can also communicate through the frequency spectrum above 6 GHz, and can also use the frequency below 6 GHz at the same time. spectrum and the spectrum above 6GHz to communicate.
  • This embodiment of the present application does not limit the spectrum resources used between the radio access network device and the terminal device.
  • the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute limitations on the technical solutions provided by the embodiments of the present application.
  • the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • the cell involved in the embodiment of the present application may be an NTN cell, and the cell in the present application is described in detail below by taking the NTN cell as a satellite cell as an example.
  • satellite cells In addition to the above-mentioned mobility-related characteristics, another important feature of satellite cells is large coverage.
  • the coverage diameter of a satellite cell can reach tens to thousands of kilometers. Therefore, there are situations where one satellite cell covers the geographic areas of multiple countries, or covers the service areas of multiple operators.
  • satellites can broadcast multiple PLMN information (such as PLMN identification information, etc.), or access and mobility management function (AMF) information (such as AMF identification information, etc.), or network Service provider (also referred to as network identification information, such as independent non-public network (SNPN) identification information, or closed access group (CAG) identification information, etc.), or service type information (such as slice identification) to indicate that it can support services of multiple countries/operators/network service providers/service types, and the terminal device can communicate with countries/operators/network service providers/ The mapping relationship between service types determines the appropriate country/operator/network service provider/service type for access.
  • PLMN information such as PLMN identification information, etc.
  • AMF access and mobility management function
  • network Service provider also referred to as network identification information, such as independent non-public network (SNPN) identification information, or closed access group (CAG) identification information, etc.
  • service type information such as slice identification
  • physical cell C covers the geographic areas of country A, country B.
  • country A corresponds to PLMN1/AMF1
  • country B corresponds to PLMN2/AMF2
  • physical cell C can broadcast the information of PLMN1 and the information of PLMN2.
  • the PLMN1/AMF1 corresponding to country A means that the PLMN of the management cell C deployed by country A is PLMN1, or the AMF connected to the access network equipment to which cell C belongs is AMF1;
  • the corresponding PLMN2/AMF2 of country B means that country B
  • the PLMN of the deployed management cell C is PLMN2, or the AMF connected to the access network equipment to which the cell C belongs is AMF2.
  • UE1 can access cell C through PLMN1/AMF1; or, when UE1 wants to access cell C, it can access cell C through PLMN1/AMF1; or In other words, when UE1 wants to access cell C, UE1 can access the cell corresponding to PLMN1/AMF1; in other words, when UE1 wants to access cell C, the access network equipment that UE1 can access is connected to AMF1. , the access network equipment that UE1 can access belongs to PLMN1.
  • UE2 can access cell C through PLMN2/AMF2; in other words, when UE2 wants to access cell C, it can access cell C through PLMN2/AMF2; In other words, when UE2 wants to access cell C, UE2 can access the cell corresponding to PLMN2/AMF2; in other words, when UE2 wants to access cell C, the core network equipment connected to the access network equipment that UE2 can access is: AMF2, the access network equipment that UE2 can access belongs to PLMN2.
  • the satellite cells can be divided into finer granularity.
  • the entire service coverage area of a satellite cell is divided into multiple areas with regular or irregular shapes, which can be called virtual cells or virtual areas, so as to better fit the geographic areas of different countries or service areas of different operators Or service areas of different network service providers or service areas of different business types.
  • different areas under the same satellite cell can correspond to different PLMNs, so that multiple logical cells can be formed under the same satellite cell, and then the mobility of terminal equipment can be effectively managed according to different areas .
  • the access network device and/or the core network device will deny UE1 access from PLMN2, and deny UE2 access from PLMN1.
  • the division of virtual cells or virtual areas may have partial overlapping areas, or may be completely isolated, that is, without any overlapping areas.
  • the embodiments of the present application can also be applied to a cell handover scenario, where a terminal device may be handed over from a source network device to a target network device due to location movement, service change, network coverage change, or other reasons.
  • the source network device refers to the network device that the terminal device accesses before performing the handover, or the network device that provides services for the terminal device before the handover;
  • the target network device refers to the network device that the terminal device needs to switch to, or The network device that the terminal device accesses after the handover is successfully performed, or the network device that provides services for the terminal device after the handover is successful.
  • the source cell refers to the cell that the terminal device accesses before performing the handover, and the source cell is the cell covered by the source network device, or the source cell is the cell under the jurisdiction of the source network device, or the source cell belongs to the source network device.
  • the target cell refers to the cell accessed by the terminal device after performing handover, the target cell is a cell covered by the target network device, or the target cell is a cell under the jurisdiction of the target network device, or the target cell belongs to the target network device.
  • the source cell and/or the target cell in this embodiment of the present application may be the NTN cell described above, such as a satellite cell, or may be other cells covering different countries/operators/network service providers/service types . That is, the service coverage area of the source cell and/or the target cell may be divided into multiple areas, and different areas may correspond to different PLMNs and/or AMFs to form different logical cells.
  • the terminal device involved in the embodiments of this application is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it can also be deployed on water (such as ships, etc.) ); can also be deployed in the air (such as aircraft, balloons and satellites, etc.
  • the terminal equipment can communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN.
  • RAN radio access network
  • the terminal device can be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiver function, a mobile internet device (MID), a wearable device, a virtual reality (virtual reality, VR) terminal device, Augmented reality (AR) terminal equipment, wireless terminal in industrial control, wireless terminal in self driving, wireless terminal in remote medical (remote medical), smart grid (smart grid) ), wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the embodiments of this application are not applicable to application scenarios.
  • the terminal equipment may also be sometimes referred to as user equipment (UE), mobile station, remote station, etc.
  • the embodiments of this application do not limit the specific technology, device form and name used by the terminal equipment.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. Wait.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • Use such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • the terminal device in this embodiment of the present application may also be an on-board module, on-board module, on-board component, on-board chip or on-board unit built into the vehicle as one or more components or units.
  • a module, on-board component, on-board chip or on-board unit may implement the method of the present application.
  • the wireless access network device involved in the embodiments of the present application is a device in the network for connecting a terminal device to a wireless network.
  • the radio access network device may be a node in the radio access network, and may also be called a base station, and may also be called a RAN node.
  • a radio access network device refers to a radio access network device deployed on the ground.
  • a radio access network device may be referred to as an access network device or a network device for short.
  • the access network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in an LTE system or an evolved LTE system (LTE-Advanced, LTE-A), such as a traditional macro base station eNB and
  • the micro base station eNB in the heterogeneous network scenario may also include the next generation node B (gNB) in the 5G system or the NR system, or may also include a radio network controller (radio network controller, RNC), Node B (Node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), transmission reception point (transmission reception point, TRP), home base station (for example, home evolved NodeB , or home Node B, HNB), base band unit (BBU), baseband pool BBU pool, or wireless fidelity (wireless fidelity, WiFi) access point (access point, AP), access backhaul integration (integrated access and backhaul, IAB) no
  • the network device may be a CU node, a DU node, or an access network device including a CU node and a DU node.
  • CU nodes can be divided into control plane (CU-CP) and user plane (CU-UP), wherein CU-CP is responsible for control plane functions, mainly including radio resource control (radio resource control, RRC) and packet data convergence protocol. (packet data convergence protocol, PDCP)-C, PDCP-C is mainly responsible for encryption and decryption of control plane data, integrity protection, data transmission, etc.
  • CU-UP is responsible for user plane functions, mainly including service data adaptation protocol (SDAP) and PDCP-U.
  • SDAP service data adaptation protocol
  • SDAP is mainly responsible for processing core network data and mapping flows to bearers.
  • PDCP-U is mainly responsible for data plane encryption and decryption, integrity protection, header compression, serial number maintenance, data transmission, etc.
  • CU-CP and CU-UP can be connected through E1 interface.
  • CU-CP represents that the CU is connected to the core network through the Ng interface, and is connected to the DU through the F1-C (control plane).
  • CU-UP is connected through F1-U (user plane) and DU.
  • F1-C user plane
  • PDCP-C is also in CU-UP.
  • the core network equipment involved in the embodiments of this application refers to equipment in a core network (core network, CN) that provides service support for terminal equipment.
  • core network devices include: AMF entities, session management function (session management function, SMF) entities, user plane function (user plane function, UPF) entities, and the like.
  • the AMF entity is used for access management and mobility management of terminal equipment;
  • the SMF entity is used for session management, such as user session establishment;
  • entities in this application may also be referred to as network elements or functional entities, that is, AMF entities may also be referred to as AMF network elements or AMF functional entities, and SMF entities may also be referred to as SMF network elements or SMF functional entities.
  • the core network device may refer to the AMF.
  • the satellites involved in the embodiments of the present application refer to network devices located on the satellites.
  • the satellites may be low earth orbiting (LEO) or medium orbiting satellites or other network devices that move high in the sky.
  • LEO low earth orbiting
  • GEO geostationary earth orbiting
  • LEO low orbit satellites
  • medium orbit satellites according to their orbital heights.
  • high-orbit satellites can also be called stationary satellites. The operation speed of high-orbit satellites is the same as the rotation speed of the earth. Therefore, high-orbit satellites remain stationary relative to the ground.
  • Low-orbit satellites can also be called low-earth orbit satellites. Low-orbit satellites move relatively fast relative to the ground. Therefore, satellite cells formed by low-orbit satellites can move with the movement of satellites.
  • Medium-orbit satellites refer to satellites whose orbital altitude is between high-orbit satellites and low-orbit satellites.
  • system and “network” in the embodiments of the present application may be used interchangeably.
  • “Plurality” refers to two or more than two, and in view of this, “plurality” may also be understood as “at least two” in the embodiments of the present application.
  • “At least one” can be understood as one or more, such as one, two or more. For example, including at least one means including one, two or more, and does not limit which ones are included. For example, if at least one of A, B, and C is included, then A, B, C, A and B, A and C, B and C, or A and B and C may be included. Similarly, the understanding of descriptions such as “at least one” is similar.
  • ordinal numbers such as “first” and “second” mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, sequence, priority, or importance of multiple objects. Moreover, the description of “first” and “second” does not limit the objects to be necessarily different.
  • the terminal device and/or the network device may perform some or all of the steps in the embodiments of the present application, these steps or operations are only examples, and the embodiments of the present application may also perform other operations or various operations deformation.
  • various steps may be performed in different orders presented in the embodiments of the present application, and may not be required to perform all the operations in the embodiments of the present application.
  • the embodiments of the present application use PLMN and AMF entities as examples to describe the involved methods, but the present invention is not limited to PLMN and AMF entities.
  • the PLMN may also be other communication networks or devices that implement part of the functions of the communication network.
  • the AMF entity may also be other entities or devices that can implement mobility management functions, or entities or devices that implement similar functions in a communication network.
  • FIG. 3 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the method includes:
  • Step S301 The first network device sends a first request message to the second network device, where the first request message is used to request to access the terminal device to the second cell under the second network device, and the first request message includes the terminal The location information of the device and the information of the first PLMN, where the first PLMN is the target PLMN to be accessed by the terminal device determined by the first network device.
  • the first request message may further include mobility restriction information of the terminal device, where the mobility restriction information may include information of a country/operator/network service provider/service type that the terminal device is allowed to access.
  • the mobility restriction information may indicate PLMN information that the terminal device is allowed to access.
  • the second network device may receive the first request message from the first network device.
  • the first network device may be a source network device, and the second network device may be a target network device.
  • the first cell may be a source cell, and the first cell is managed by the first network device, or the first cell is a cell under the first network device or the first cell belongs to the first network device.
  • the second cell may be a target cell, and the second cell is managed by the second network device, or the second cell is a cell under the second network device or the second cell belongs to the second network device.
  • the first cell and the second cell may be adjacent cells, and the first cell and the second cell may be NTN cells.
  • the location information of the terminal device may include one or more of longitude information, latitude information, and altitude information, or may also be other forms of location information, which is not limited in this application.
  • the location information can be used to describe a specific location point, such as longitude, latitude and altitude information of the location point where the terminal device is currently located.
  • the location information can also be used to describe a general area range, that is, an area range where the terminal device is currently located. , plus parameters such as the diameter or radius of the area.
  • the location information or area information may be represented by an identifier, for example, the identifier may be an index or an ID, and the mapping relationship between the identifier and the location information or area information may be a protocol Agreed, or sent by the network device/core network device to the terminal device, that is, the terminal device, the network device or the core network device can determine the corresponding location or area according to the identifier.
  • the description of the scope of the region may also have other forms of expression, which will not be exemplified one by one in this application.
  • the location information of the terminal device may be received by the first network device from the terminal device.
  • the first network device may receive a measurement report reported by the terminal device, where the measurement report may include its own location information measured by the terminal device.
  • the location information of the terminal device may be received by the first network device from other network devices, for example, the first network device may receive the location information of the terminal device from the core network device.
  • the location information of the terminal device may also be determined by the first network device.
  • the first network device may position the terminal device to obtain the location information of the terminal device.
  • the location information of the terminal device may also be obtained by the first network device in other ways, which is not limited in this application.
  • the information of the first PLMN may include identification information of the first PLMN, for example, the ID of the first PLMN (ie, PLMN-identifier).
  • the information of the second PLMN described below may include identification information of the second PLMN, for example, the ID of the second PLMN (ie, PLMN-identifier). It can be understood that the embodiments of this application use PLMN as an example, and can also be extended to countries/operators/network service providers/service types, which are not limited in this application.
  • the first network device may determine that the second cell is an NTN cell, or determine that the second cell is an NTN cell and the The number of PLMNs supported by the second cell is at least two, or it is determined that the number of PLMNs supported by the second cell is at least two, and there is a correspondence between areas and PLMNs.
  • the first network device may receive first indication information from the terminal device or the second network device, where the first indication information is used to indicate that the second cell is an NTN cell , or the first indication information is used to indicate that the second cell is an NTN cell and the number of PLMNs supported by the second cell is at least two, or the first indication information is used to indicate that the number of PLMNs supported by the second cell is at least two, and There is a correspondence between regions and PLMNs.
  • the number of PLMNs supported by the second cell is at least two means that the number of PLMNs supported by the second cell is greater than or equal to two, or that there are multiple PLMNs supported by the second cell.
  • the first network device can be made to know that the second cell under the second network device is an NTN cell, and that the second cell supports at least two PLMNs.
  • the corresponding relationship between the existence area of the second cell and the PLMN may mean that terminal devices in different areas in the second cell need to access or switch to the second cell from the corresponding PLMN.
  • the embodiment of the present application uses an NTN cell as an example, and can also be extended to cells supporting multiple countries/operators/network service providers/service types, which is not limited in this application.
  • the terminal device may learn that the second cell is an NTN cell by reading the system message of the second cell, or learn that the second cell is an NTN cell and the number of PLMNs supported by the second cell is at least two, or obtain It is known that there are at least two PLMNs supported by the second cell, and there is a correspondence between areas and PLMNs. Further, the terminal device may send the first indication information to the first network device.
  • the first network device may receive cell information of the second cell from the terminal device or the second network device, and the cell information of the second cell may include the first Information about at least two PLMNs supported by the second cell.
  • the cell information of the second cell may further indicate that the second cell is an NTN cell, or may indicate that the second cell has a corresponding relationship between an area and a PLMN.
  • the first network device determines the first PLMN accessed by the terminal device from at least two PLMNs supported by the second cell according to the cell information of the second cell, thereby ensuring that the first PLMN carried in the first request message is the first PLMN 2.
  • the PLMN supported by the network device may receive cell information of the second cell from the terminal device or the second network device, and the cell information of the second cell may include the first Information about at least two PLMNs supported by the second cell.
  • the cell information of the second cell may further indicate that the second cell is an NTN cell, or may indicate that the second cell has a corresponding relationship between an area and
  • the first network device determines that the second cell is an NTN cell, or determines that the second cell is an NTN cell and that the second cell supports at least two PLMNs, or determines that the second cell supports at least two PLMNs. , and after there is a corresponding relationship between the area and the PLMN, as shown in step S404 in FIG. 4 , the first network device can send third indication information to the terminal device, and the third indication information is used to instruct the terminal device to report the second
  • the measurement result of the cell carries the location information of the terminal equipment.
  • the terminal device may send a measurement report to the first network device, where the measurement report includes the measurement result of the second cell and the location information of the terminal device.
  • the third indication information may be included in the location measurement configuration information sent by the first network device to the terminal device, where the location measurement configuration information is used to instruct the terminal device to perform location measurement.
  • the terminal device can perform location measurement according to the received location measurement configuration information, and when reporting the measurement result of the second cell according to the indication of the third indication information, send the measured location information to the user through the measurement report.
  • the first network device may be included in the location measurement configuration information sent by the first network device to the terminal device, where the location measurement configuration information is used to instruct the terminal device to perform location measurement.
  • the terminal device can perform location measurement according to the received location measurement configuration information, and when reporting the measurement result of the second cell according to the indication of the third indication information, send the measured location information to the user through the measurement report.
  • the first network device may be included in the location measurement configuration information sent by the first network device to the terminal device, where the location measurement configuration information is used to instruct the terminal device to perform location measurement.
  • the first network device may still receive the cell information of the second cell from the terminal device, or may receive the cell information of the second cell from the second network device, and Not limited.
  • the first network device may still receive the cell information of the second cell from the second network device, or may receive the cell information of the second cell from the terminal device Information is also not limited.
  • the at least two PLMNs supported by the second cell include a first PLMN and a second PLMN, and correspondingly, the second cell covers at least a first area corresponding to the first PLMN and a second area corresponding to the second PLMN.
  • the number of PLMNs supported by the second cell is at least two, when the number of PLMNs supported by the second cell is two, the first PLMN and the second PLMN are all PLMNs supported by the second cell; When the number of PLMNs is greater than two, the first PLMN and the second PLMN are two of all PLMNs supported by the second cell, that is, the second cell can support other PLMNs in addition to the first PLMN and the second PLMN , this application is not limited.
  • Step S302 the second network device determines whether to allow access/handover of the terminal device according to the location information of the terminal device.
  • the second network device determines, according to the location information of the terminal device, whether the terminal device is located in the first area corresponding to the first PLMN. If it is determined that the terminal device is located in the first area corresponding to the first PLMN, the second network device may accept the access/handover request of the terminal device. Optionally, the second network device may also reject the access/handover request of the terminal device. For example, the second network device determines to reject the access/handover request of the terminal device after further judgment based on other handover decision factors (for example, the load of the second cell is relatively high).
  • the second network device may reject the access/handover request of the terminal device. Further, the second network device may determine whether the terminal device supports the second PLMN according to the mobility restriction information of the terminal device. If the terminal device supports the second PLMN, the second network device determines the second PLMN as the target PLMN that the terminal device is allowed to access, and both the first PLMN and the second PLMN are PLMNs supported by the second network device.
  • Step S303 the second network device sends a first response message to the first network device.
  • the first network device may receive the first response message from the second network device.
  • the first response message includes information of a second PLMN, where the second PLMN is a target PLMN that the second network device allows the terminal device to access. That is, the second network device may carry the information of the target PLMN that the terminal device is allowed to access in the first response message.
  • the second network device may determine that the second PLMN is the target PLMN that the terminal device is allowed to access, and the second PLMN is related to the second PLMN.
  • the location of the terminal equipment matches, and is the PLMN corresponding to the area to which the current location of the terminal equipment belongs.
  • the first network device can re-initiate the handover request according to the second PLMN, and connect the terminal device to the second cell from the second PLMN corresponding to the area to which the terminal device belongs, thereby effectively improving the handover success rate.
  • the first response message may also include second indication information, where the second indication information is used to indicate that the location where the terminal device is located does not match the first PLMN that the terminal device requests to access.
  • the location where the terminal device is located does not match the first PLMN requested by the terminal device to access may mean that the location where the terminal device is located is not within the range of the first area corresponding to the first PLMN requested to access.
  • the first network device can determine that the second network device refuses the terminal device to access the second cell because the location of the terminal device does not match the first PLMN that was previously determined to access.
  • the second indication information may be used to indicate the reason for the handover failure, and the second indication information may also have other expressions, such as being used to indicate that the requested PLMN is invalid or wrong.
  • the terminal can be made to The PLMN accessed by the device must be the PLMN supported by the second network device, so as to avoid other situations in which the handover fails because the second network device does not support the accessed PLMN.
  • the first response message may include target PLMN information and/or second indication information. That is to say, neither the information of the target PLMN nor the second indication information is mandatory information in the first response message, and the first response message may include one or both of the information of the target PLMN and the second indication information , and both of these two kinds of information have the function of indicating the handover failure.
  • the second network device may allow the terminal device to access the second cell from the first PLMN.
  • a response message may also be called a handover request confirmation message, a handover command message, or a reconfiguration message, or have other names, which are not limited in this application.
  • the first network device may carry the location information of the terminal device in the first request message, and the second network device makes a handover/access decision according to the location information of the terminal device in the first request message to determine whether to The terminal equipment is allowed to handover/access to the second cell.
  • the second network device may determine that the PLMN requested by the terminal device is incorrect, or that the location of the terminal device is different from that of the first PLMN.
  • the handover request of the terminal device needs to be rejected, that is, the terminal device is not allowed to switch/access from the first PLMN to the second cell.
  • the first response message may also be referred to as a handover failure message.
  • FIG. 5 and FIG. 6 are two specific examples of a handover process in a communication method provided in an embodiment of the application.
  • the specific example shown in FIG. 5 corresponds to a scenario in which a directly connected interface exists between the first network device and the second network device, and the first network device and the second network device may perform a handover process based on the directly connected interface.
  • the directly connected interface may be, for example, an Xn interface.
  • the handover process may also be referred to as an Xn interface-based handover (Xn based HO) or an Xn handover process.
  • the solution shown in FIG. 5 is also applicable to the case where the directly connected interface is an X2 interface, which is not limited in this application.
  • the first network device and the second network device may be based on the relationship between the access network device and the core network device.
  • the interface performs the handover process.
  • the core network device may, for example, refer to an AMF, and the interface between the access network device and the core network device may be, for example, an NG interface.
  • the handover process may also be referred to as an NG interface-based handover (NG based HO). Or NG switching process.
  • NG based HO NG interface-based handover
  • NG switching process NG switching process.
  • the solution shown in FIG. 6 is also applicable to the case where the interface between the access network device and the core network device is the S1 interface (correspondingly, the core network device may be a mobility management entity (MME) at this time, and this The application is not limited.
  • MME mobility management entity
  • the UE may send a measurement report to the first base station.
  • the measurement report includes location information of the UE.
  • the first base station may send a handover request message to the second base station, where the handover request message includes the location information of the UE and the information of the PLMN1 that the UE accesses determined by the first base station.
  • the location information of the UE included in the handover request message may be obtained by the first base station from the measurement report reported by the UE, or may be obtained by the first base station in other ways, such as locating the position of the UE Obtained, or obtained from other network devices, which is not limited.
  • PLMN1 is a PLMN supported by the second base station.
  • the PLMN1 may be determined by the first base station according to the cell information of the second cell under the second base station, or may be determined by the first base station according to the cell information of the second cell and combined with the UE's cell information. Mobility restriction information and/or subscription information.
  • the handover request message may further include mobility restriction information of the UE.
  • the cell information and the mobility restriction information reference may be made to the relevant description in step S301 above, which will not be repeated here.
  • the second base station may determine whether to allow the UE to access/handover to the second cell according to the location information of the UE.
  • step S504a if the location of the UE is outside the first area covered by the second cell, and the first area corresponds to the PLMN1 to be accessed by the UE, the second base station may determine that the handover fails and needs to reject the The handover request of the UE, that is, refusing the UE to access the second cell from PLMN1.
  • the second base station may send a handover failure message to the first base station in step S504a, and carry second indication information in the handover failure message, and the second indication information is used to indicate that the location of the UE does not match the first PLMN. , which indicates the reason for the handover failure.
  • the second network device may determine whether the terminal device supports PLMN2 according to the mobility restriction information of the terminal device . If the terminal device supports PLMN2, the second base station may send a handover failure message to the first base station in step S504a, and the handover failure message carries PLMN2 information and/or second indication information.
  • the PLMN2 is a target PLMN determined by the second base station to allow the UE to access, and the PLMN2 is a PLMN corresponding to the second area to which the location of the UE belongs.
  • the first base station can subsequently re-initiate a handover request to access the second PLMN, so that the UE is successfully handed over to the second cell.
  • the handover failure message may also be called a handover preparation failure message, or has other names, which are not limited.
  • step S503 if the location of the UE is within the first area covered by the second cell, and the first area corresponds to the PLMN1 to be accessed by the UE, the second base station may accept the handover request of the UE, and determine to allow the UE to PLMN1 accesses the second cell. Therefore, the second base station may send a handover request confirmation message to the first base station in step S504b, and then in step S505, the first base station may further send an RRC reconfiguration message to the UE.
  • the UE may send a measurement report to the first base station.
  • the measurement report includes location information of the UE.
  • the first base station may send a first handover request message to the AMF1, where the first handover request message may include the location information of the UE and the information of the PLMN1 determined by the first base station to be accessed by the UE.
  • the first handover request message may be a HO required message or other messages, which are not limited.
  • the location information of the UE included in the first handover request message may be obtained by the source base station from the measurement report reported by the UE, or may be obtained by the source base station in other ways, which is not limited.
  • PLMN1 is a PLMN supported by the second base station.
  • the PLMN1 may be determined by the first base station according to the cell information of the second cell under the second base station, or may be determined by the first base station according to the cell information of the second cell and combined with the UE's cell information. Mobility restriction information and/or subscription information.
  • the handover request message may further include mobility restriction information of the UE.
  • the cell information and mobility restriction information reference may be made to the relevant descriptions in step S301 above, which will not be repeated here.
  • step S602 may be replaced by step S602', the first base station may send a first handover request message to AMF1, and the first handover request message may include a message for instructing AMF1 to provide the location information of the UE The indication information, and the information of the PLMN1 that the UE accesses determined by the first base station.
  • the AMF1 may acquire the location information of the UE according to the indication information used to instruct the AMF1 to provide the location information of the UE, and carry the location information of the UE in the second handover request message in step S603.
  • the location information of the UE acquired by AMF1 may be the location information reported by the UE received by AMF1, or acquired by AMF1 through the location server of the UE, or acquired in other ways, which are not limited.
  • the first handover request message may further include mobility restriction information of the terminal device.
  • the AMF1 may send a second handover request message to the second base station, where the second handover request message may include the location information of the UE and the information of the PLMN1 determined by the first base station to be accessed by the UE.
  • the second handover request message may be a HO request message or other messages, which are not limited.
  • the location information of the UE included in the second handover request message is obtained by AMF1 from the first handover request message, or may be obtained by AMF1 through other methods, such as locating the location of the UE, or It is obtained from other network devices, which is not limited.
  • the second handover request message may further include mobility restriction information of the terminal device.
  • the second base station may determine whether to allow the UE to access/handover to the second cell according to the location information of the UE.
  • step S604a if the location of the UE is outside the first area covered by the second cell, and the first area corresponds to the PLMN1 to be accessed by the UE, the second base station may determine that the handover fails and needs to reject the The handover request of the UE, that is, refusing the UE to access the second cell from PLMN1.
  • the second base station may send the first handover failure message to the AMF1 in step S605a, and carry the second indication information in the first handover failure message, and the second indication information is used to indicate the location of the UE and the first PLMN. If it does not match, it indicates the reason for the handover failure.
  • the second network device may determine whether the terminal device supports PLMN2 according to the mobility restriction information of the UE. If the terminal device supports PLMN2, the second base station may send a first handover failure message to AMF1 in step S605a, and the first handover failure message carries information of PLMN2 and/or second indication information.
  • the PLMN2 is a target PLMN determined by the second base station to allow the UE to access, and the PLMN2 is a PLMN corresponding to the area to which the location of the UE belongs.
  • the AMF1 may send a second handover failure message to the first base station, where the second handover failure message carries the information of the PLMN2 and/or the second indication information.
  • the second handover failure message may be a handover preparation failure message or other messages, which are not limited.
  • the first base station may receive the second handover failure message.
  • the first base station may re-initiate a handover request for accessing to the second PLMN, so that the UE is successfully handed over to the second cell.
  • the second handover failure message may also be called a handover preparation failure message, or has other names, which are not limited.
  • step S604 if the location of the UE is within the first area covered by the second cell, and the first area corresponds to the PLMN1 to be accessed by the UE, the second base station may accept the handover request of the UE, and determine to allow the UE to access from the UE. PLMN1 accesses the second cell. Therefore, the second base station may send a handover request confirmation message to AMF1 in step S605b, and then in step S606b, AMF1 may send a handover command message to the first base station, and then in step S607, the first base station may further send an RRC reset message to the UE Configuration messages.
  • the specific example shown in FIG. 6 is described by taking the example that the first base station and the second base station belong to the same AMF, that is, the AMF1 shown in the figure. It can be understood that the first base station and the second base station may also belong to different AMFs.
  • the handover process may also include a handover process between AMFs, and the messages used for handover exchanged between AMFs also include the location information of the UE, and allow the UE One or more kinds of information such as the information of the target PLMN to be accessed, the second indication information, etc., are not repeated here.
  • the second cell is a neighboring cell of the first cell.
  • the first cell may also have other neighboring cells.
  • the first cell has two adjacent cells, the second cell and the third cell, and the first cell, the second cell and the third cell are all NTN cells.
  • the first cell is a cell under the first network device, and the first cell only supports PLMN1, that is, the first cell supports one PLMN. It should be noted that the embodiment of the present application does not specifically limit the number of PLMNs supported by the first cell, which is only an example here.
  • the second cell is a cell under the second network device, the second cell supports PLMN1 and PLMN2, and PLMN1 corresponds to the first area, PLMN2 corresponds to the second area, that is, the second cell supports two PLMNs, and the second cell covers PLMN1 corresponding to The first area of , and the second area corresponding to PLMN2.
  • the third cell is a cell under the third network device, and the third cell supports only PLMN1, that is, the number of PLMNs supported by the third cell is one.
  • the first network device may exchange cell information of the respective cells with the second network device and the third network device respectively, and according to the information supported by each neighbor of the first cell
  • an indication message is sent to the terminal device, indicating whether the terminal device needs to report its location information.
  • the first network device may receive cell information of the second cell from the second network device, where the cell information of the second cell includes information of the PLMN supported by the second cell (such as the information of the first PLMN). and second PLMN information).
  • the cell information of the second cell may further include at least one of identification information of the second cell, frequency point information of the second cell, physical cell identification (physical cell identification, PCI) and other information.
  • the cell of the second cell may further indicate that the second cell is an NTN cell, or may indicate that the second cell has a corresponding relationship between an area and a PLMN. In this way, the first network device may determine, according to the cell information of the second cell, that there are multiple PLMNs supported by the second cell.
  • the first network device may also send the cell information of the first cell to the second network device, and details are not repeated here.
  • the first network device may receive cell information of the third cell from the third network device, where the cell information of the third cell includes PLMN information (eg, information of the first PLMN) supported by the third cell.
  • the cell information of the third cell may further include identification information of the third cell, frequency point information of the third cell, PCI and other information. In this way, the first network device may determine, according to the cell information of the third cell, that there is one PLMN supported by the third cell.
  • the first network device may also send the cell information of the first cell to the third network device, and details are not repeated here.
  • the first network device when the first network device determines to switch the terminal device to the second cell, the first network device needs to determine the location of the terminal device according to the location of the terminal device. information to determine the information of the target PLMN during handover.
  • the terminal device when the measurement report of the terminal device includes the measurement result of the second cell, the terminal device needs to report its own location information, so as to facilitate the target network device According to the location information of the terminal device, it is judged whether its access is reasonable, for example, whether the location of the terminal device matches the PLMN it requests.
  • the measurement report of the terminal device only includes the measurement result of the third cell, the terminal device does not need to report its own location information.
  • the first network device may send indication information to the terminal device, where the indication information is used to indicate whether the terminal device needs to report location information.
  • the indication information is used to indicate whether the terminal device needs to report the location information when reporting the measurement report, or is used to indicate the condition for the terminal device to report the location information in its measurement report.
  • the condition for reporting the location information may be, for example, that the terminal equipment needs to report its location information when the measurement results of which cells are included in the measurement report.
  • the cell may be identified by frequency point information of the cell, or frequency point information and PCI.
  • the indication information may be included in measurement configuration information or location measurement configuration information sent by the first network device to the terminal device, where the location measurement configuration information is used to instruct the terminal device to perform location measurement.
  • the terminal device may determine whether it needs to report its location information, and send a measurement report to the first network device.
  • the indication information may be configured based on a cell (per cell).
  • the third indication information may correspond to the second cell
  • the fourth indication information may correspond to the third cell.
  • the first network device may use the third indication information to indicate that the location information needs to be reported when reporting the measurement result of the second cell.
  • the third indication information is sent to the terminal device in combination with the frequency point information of the second cell and the PCI; the first network device
  • the fourth indication information may indicate that the location information of the third cell does not need to be reported when reporting the measurement result of the third cell.
  • the terminal device may, according to the measurement result of the cell reported in the measurement report, and the third indication information and the fourth indication information, determine that the location information needs to be reported when the measurement report includes the measurement result of the second cell, and when the measurement report includes the measurement result of the second cell When only the measurement result of the third cell is included in the report, the location information does not need to be reported.
  • FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device 900 includes a transceiver module 910 and a processing module 920 .
  • the communication apparatus may be used to implement the functions related to a network device (eg, a first network device or a second network device) in any of the foregoing method embodiments.
  • the communication apparatus may be a network device or a chip or circuit included in the network device.
  • the processing module 920 is configured to generate a first request message, where the first request message is used to request Access the terminal device to the second cell under the second network device, the first request message includes the location information of the terminal device and the information of the first PLMN, and the first PLMN is determined by the first network device the target PLMN accessed by the terminal device; the transceiver module 910 is configured to send a first request message to the second network device, and receive a first response message from the second network device, where the first response message includes a second PLMN information, the second PLMN is the target PLMN that the second network device allows the terminal device to access; wherein, the location of the terminal device is located outside the first area corresponding to the first PLMN, and is located in the second PLMN corresponding to the second PLMN. Within the area, both the first PLMN and the second PLMN are PLMNs supported by the
  • the transceiver module 910 is further configured to receive first indication information from the terminal device or the second network device, where the first indication information is used to indicate that the second cell is an NTN cell, or is used to indicate the first indication information
  • the second cell is an NTN cell and the number of PLMNs supported by the second cell is at least two.
  • the transceiver module 910 is further configured to receive cell information of the second cell from the terminal device or the second network device, where the cell information of the second cell includes at least two PLMNs supported by the second cell. information, the at least two PLMNs include a first PLMN and a second PLMN.
  • the first response message further includes second indication information, where the second indication information is used to indicate that the location where the terminal device is located does not match the first PLMN requested to access.
  • the transceiver module 910 is further configured to send third indication information to the terminal device, where the third indication information is used to instruct the terminal device to carry the location information of the terminal device when reporting the measurement result of the second cell.
  • the transceiver module 910 is specifically configured to send the first request message to the second network device through the core network device; and receive the first response message from the second network device from the core network device .
  • the transceiver module 910 is configured to receive a first request message from the first network device, the first request message using In order to request to access the terminal device to the second cell under the second network device, the first request message includes the location information of the terminal device and the information of the first PLMN, and the first PLMN is the terminal device determined by the first network device.
  • the target PLMN to be accessed is configured to, if the location of the terminal device is located outside the first area corresponding to the first PLMN and within the second area corresponding to the second PLMN, then determine the second PLMN as The target PLMN that the terminal device is allowed to access, the first PLMN and the second PLMN are both PLMNs supported by the second network device; the transceiver module 910 is further configured to send a first response message to the first network device, the first PLMN A response message includes information of the second PLMN.
  • the transceiver module 910 is further configured to send first indication information to the first network device, where the first indication information is used to indicate that the second cell is an NTN cell, or is used to indicate that the second cell is an NTN cell There are at least two PLMNs supported by the NTN cell and the second cell.
  • the transceiver module 910 is further configured to send cell information of the second cell to the first network device, where the cell information of the second cell includes information of at least two PLMNs supported by the second cell, so The at least two PLMNs include a first PLMN and a second PLMN.
  • the first response message further includes second indication information, where the second indication information is used to indicate that the location where the terminal device is located does not match the first PLMN requested to access.
  • the transceiver module 910 is specifically configured to receive, from the core network device, the first request message from the first network device; and send the first response message to the first network device through the core network device.
  • the processing module 920 involved in the communication apparatus may be implemented by at least one processor or processor-related circuit components
  • the transceiver module 910 may be implemented by at least one transceiver or transceiver-related circuit components or communication interfaces.
  • the operations and/or functions of each module in the communication device are respectively to implement the corresponding processes of the methods shown in FIG. 3 , FIG. 4 , FIG. 5 , FIG. 6 , or FIG. 8 , and are not described here for brevity.
  • the communication device may further include a storage module, which may be used to store data and/or instructions, and the transceiver module 910 and/or the processing module 920 may read the data and/or instructions in the access module, Thereby, the communication device can implement the corresponding method.
  • the memory module can be implemented, for example, by at least one memory.
  • the above-mentioned storage module, processing module, and transceiver module may exist separately, or all or part of the modules may be integrated, for example, the storage module and the processing module are integrated, or the processing module and the transceiver module are integrated.
  • FIG. 10 is another schematic structural diagram of a communication device provided in an embodiment of the present application.
  • the communication apparatus may specifically be a network device, such as a base station, for implementing the functions related to the network device (eg, the first network device or the second network device) in any of the foregoing method embodiments.
  • the network equipment includes: one or more radio frequency units, such as a remote radio unit (remote radio unit, RRU) 1001 and one or more baseband units (baseband unit, BBU) (also referred to as digital units, digital units, DUs) )1002.
  • the RRU 1001 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 10011 and a radio frequency unit 10012.
  • the RRU 1001 part is mainly used for the transceiver of radio frequency signals and the conversion of radio frequency signals and baseband signals.
  • the part of the BBU 1002 is mainly used to perform baseband processing, control the base station, and the like.
  • the RRU 1001 and the BBU 1002 may be physically set together, or may be physically separated, that is, a distributed base station.
  • the BBU 1002 is the control center of the base station, which can also be called a processing unit, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spectrum spreading, and the like.
  • the BBU (processing unit) 1002 may be used to control the base station to perform the operation procedures related to the network device in the foregoing method embodiments.
  • the BBU 1002 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as an LTE network) with a single access indication, or may respectively support a wireless access network with different access standards.
  • Wireless access network (such as LTE network, 5G network or other network).
  • the BBU 1002 may also include a memory 10021 and a processor 10022, and the memory 10021 is used to store necessary instructions and data.
  • the processor 10022 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the sending operation in the foregoing method embodiments.
  • the memory 10021 and the processor 10022 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be provided on each single board.
  • FIG. 11 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • the communication device 1100 includes a transceiver module 1110 and a processing module 1120 .
  • the communication apparatus can be used to implement the functions related to the terminal device in any of the foregoing method embodiments.
  • the communication device may be a terminal device, such as a handheld terminal device or a vehicle-mounted terminal device; the communication device may also be a chip or circuit included in the terminal device, or a device including the terminal device, such as various types of vehicles.
  • the transceiver module 1110 is configured to receive third indication information from the first network device, the third indication The information is used to instruct the terminal equipment to carry the location information of the terminal equipment when reporting the measurement result of the second cell, and the second cell is a cell under the second network equipment; the processing module 1120 is used to generate a measurement report, in which the measurement report is The location information of the terminal device is included; the transceiver module 1110 is further configured to send a measurement report to the first network device.
  • the transceiver module 1110 is further configured to send first indication information to the first network device, where the first indication information is used to indicate that the second cell is an NTN cell, or the first indication information is used to It is indicated that the second cell is an NTN cell and the number of PLMNs supported by the second cell is at least two.
  • the transceiver module 1110 is further configured to send cell information of the second cell to the first network device, where the cell information of the second cell includes information of at least two PLMNs supported by the second cell.
  • the processing module 1120 involved in the communication apparatus may be implemented by at least one processor or a processor-related circuit component, and the transceiver module 1110 may be implemented by at least one transceiver or a transceiver-related circuit component or a communication interface.
  • the operations and/or functions of each module in the communication device are respectively to implement the corresponding processes of the methods shown in FIG. 4 , FIG. 5 , FIG. 6 or FIG. 8 , and for brevity, details are not repeated here.
  • the communication device may further include a storage module, the storage module may be used to store data and/or instructions, the transceiver module 1110 and/or the processing module 1120 may read the data and/or instructions in the access module, Thereby, the communication device can implement the corresponding method.
  • the memory module can be implemented, for example, by at least one memory.
  • the above-mentioned storage module, processing module, and transceiver module may exist separately, or all or part of the modules may be integrated, for example, the storage module and the processing module are integrated, or the processing module and the transceiver module are integrated.
  • the communication device may be a terminal device, and the communication device may be used to implement the functions related to the terminal device in any of the foregoing method embodiments.
  • the terminal device takes a mobile phone as an example.
  • the terminal device includes a processor, and may also include a memory. Of course, it may also include a radio frequency circuit, an antenna, an input and output device, and the like.
  • the processor is mainly used to process communication protocols and communication data, control terminal equipment, execute software programs, and process data of software programs.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal equipment may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.
  • FIG. 12 only one memory and processor are shown in FIG. 12 . In an actual end device product, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or a storage device or the like.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.
  • the antenna and the radio frequency circuit with a transceiver function may be regarded as a transceiver unit of the terminal device, and the processor with a processing function may be regarded as a processing unit of the terminal device.
  • the terminal device includes a transceiver unit 1210 and a processing unit 1220 .
  • the transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, or the like.
  • the processing unit may also be referred to as a processor, a processing single board, a processing module, a processing device, and the like.
  • the device for implementing the receiving function in the transceiver unit 1210 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 1210 may be regarded as a transmitting unit, that is, the transceiver unit 1210 includes a receiving unit and a transmitting unit.
  • the transceiver unit may also sometimes be referred to as a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may also sometimes be referred to as a receiver, receiver, or receiving circuit, or the like.
  • the transmitting unit may also sometimes be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.
  • transceiving unit 1210 is configured to perform the sending and receiving operations on the terminal device side in the above method embodiments
  • processing unit 1220 is configured to perform other operations on the terminal device in the above method embodiments except the transceiving operations.
  • An embodiment of the present application further provides a chip system, including: a processor, where the processor is coupled with a memory, the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor, the The chip system implements a method corresponding to a terminal device or a method corresponding to a network device in any of the foregoing method embodiments.
  • the number of processors in the chip system may be one or more.
  • the processor can be implemented by hardware or by software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor implemented by reading software codes stored in memory.
  • the memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory can be a non-transitory processor, such as a read-only memory ROM, which can be integrated with the processor on the same chip, or can be provided on different chips.
  • the setting method of the processor is not particularly limited.
  • the system-on-chip may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or a system on chip (SoC), It can also be a central processing unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), or a microcontroller (microcontroller).
  • controller unit, MCU it can also be a programmable logic device (PLD) or other integrated chips.
  • each step in the above method embodiments may be implemented by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the method steps disclosed in conjunction with the embodiments of the present application may be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • Embodiments of the present application further provide a computer-readable storage medium, where computer-readable instructions are stored in the computer storage medium, and when the computer reads and executes the computer-readable instructions, the computer is made to execute any of the foregoing method embodiments method in .
  • the embodiment of the present application also provides a computer program product, when the computer reads and executes the computer program product, it causes the computer to execute the method in any of the above method embodiments.
  • An embodiment of the present application further provides a communication system, where the communication system includes a first network device, a second network device, and at least one terminal device, wherein the first network device may be a source network device, and the second network device may be a target network equipment.
  • the communication system may further include core network equipment.
  • processors mentioned in the embodiments of the present application may be a central processing unit (central processing unit, CPU), and may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), application-specific integrated circuits ( application specific integrated circuit, ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM enhanced synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SCRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components
  • the memory storage module
  • memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution, and the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

本申请公开了一种通信方法及装置，该方法包括：在第二网络设备下的第二小区支持多个PLMN的场景下，第一网络设备可以向第二网络设备发送第一请求消息，在该第一请求消息中携带终端设备的位置信息和第一PLMN的信息，该第一PLMN为第一网络设备确定的终端设备接入的目标PLMN。如此，第二网络设备可以根据第一请求消息中终端设备的位置信息，判断终端设备请求接入的PLMN是否合理，如果终端设备所在的位置位于第一PLMN对应的第一区域之外，则第二网络设备可以拒绝终端设备的切换请求，从而避免终端设备从非其位置所属的国家/运营商接入，保证NTN小区下的终端设备的通信行为可以符合其位置所属的国家/运营商的通信策略。

Description

一种通信方法及装置 技术领域
本申请涉及无线通信技术领域，尤其涉及一种通信方法及装置。
背景技术
非陆地网络(non terrestrial networks，NTN)通信系统通过将接入网设备或部分接入网设备的功能部署在高空平台或者卫星等非地面设备上，为终端设备提供无缝覆盖，并且由于高空平台或卫星位于高空中，受自然灾害的影响较小，因此，NTN通信系统的可靠性较高。
NTN通信系统还有一个重要特征为NTN小区的覆盖范围通常比较大，例如小区覆盖直径可以达到几十到上千公里，因此，会存在一个NTN小区覆盖了多个国家的地理区域或者覆盖了多个运营商的服务区域的情形。以NTN系统为卫星通信系统为例，卫星可以通过广播多个公共陆地移动网络(public land mobile network，PLMN)的信息来指示其可以支持多个国家或运营商的服务。
现有技术中，只要终端设备位于小区的覆盖范围内，终端设备就可以接收到卫星的信号，并基于接收到的信号进行测量结果的上报，以便网络根据终端设备上报的测量结果进行切换判决。但是在目标小区支持多个PLMN的场景下，不同的PLMN对应的通信策略不同，这时仅根据终端设备上报的小区的测量结果来执行到目标小区的切换，可能会存在终端设备请求接入到与其位置不匹配的PLMN的情况，这时终端设备的通信行为无法满足其请求接入的PLMN的通信策略要求，进而导致切换流程失败，影响通信性能。
发明内容
本申请实施例中的一种通信方法及装置，用于在当目标小区为支持多个PLMN的NTN小区时，使终端设备可以从与其位置相匹配的PLMN切换/接入到目标小区，从而满足相应的通信策略要求。
第一方面，本申请实施例提供一种通信方法，该方法可由第一网络设备执行，也可以由配置于第一网络设备的部件(例如芯片或者电路)执行，在本申请下文的描述中，将以第一网络设备执行该方法为例进行说明。
该方法可以包括：第一网络设备向第二网络设备发送第一请求消息，该第一请求消息用于请求将终端设备接入到第二网络设备下的第二小区，该第一请求消息包括终端设备的位置信息和第一PLMN的信息，该第一PLMN为第一网络设备确定的终端设备接入的目标PLMN；第一网络设备接收来自第二网络设备的第一响应消息，该第一响应消息包括第二PLMN的信息，该第二PLMN为第二网络设备允许终端设备接入的PLMN；其中，终端设备所在的位置位于第一PLMN对应的第一区域之外，且位于第二PLMN对应的第二区域之内，所述第一PLMN和第二PLMN均为第二网络设备支持的PLMN。
采用上述技术方案，在第二小区支持多个PLMN的场景下，第一网络设备可以向第二网络设备提供终端设备的位置信息，用于目标网络设备根据终端设备的位置信息，判断终端设备请求接入的PLMN是否合理，从而避免终端设备从非其位置所属的国家/运营商接 入，保证NTN小区下的终端设备的通信行为可以符合其位置所属的国家/运营商的通信策略。
在第一方面的一种可能的设计中，该方法还包括：第一网络设备从终端设备或第二网络设备接收第二指示信息，该第二指示信息用于指示第二小区为NTN小区，或者，该第二指示信息用于指示第二小区为NTN小区且第二小区支持的PLMN为至少两个。
在第一方面的一种可能的设计中，该方法还包括：第一网络设备从终端设备或第二网络设备接收第二小区的小区信息，所述第二小区的小区信息包括第二小区支持的至少两个PLMN的信息，所述至少两个PLMN包括第一PLMN和第二PLMN。
在第一方面的一种可能的设计中，该第一响应消息中还包括第二指示信息，该第二指示信息用于指示终端设备所在的位置与请求接入的所述第一PLMN不匹配。
在第一方面的一种可能的设计中，该方法还包括：第一网络设备向终端设备发送第三指示信息，该第三指示信息用于指示所述终端设备在上报第二小区的测量结果时携带所述终端设备的位置信息。
在第一方面的一种可能的设计中，第一网络设备向第二网络设备发送第一请求消息具体可以包括：第一网络设备通过核心网设备向第二网络设备发送第一请求消息。相应的，第一网络设备接收来自第二网络设备的第一响应消息具体可以包括：第一网络设备从核心网设备接收来自第二网络设备的第一响应消息。
第二方面，本申请实施例提供一种通信方法，该方法可由第二网络设备执行，也可以由配置于第二网络设备的部件(例如芯片或者电路)执行，在本申请下文的描述中，将以第二网络设备执行该方法为例进行说明。
该方法可以包括：第二网络设备接收来自第一网络设备的第一请求消息，该第一请求消息用于请求将终端设备接入到第二网络设备下的小区，该第一请求消息中包括终端设备的位置信息和第一PLMN的信息，该第一PLMN为第一网络设备确定的终端设备接入的目标PLMN；若终端设备所在的位置位于第一PLMN对应的第一区域之外，且位于第二PLMN对应的第二区域之内，则第二网络设备将第二PLMN确定为允许终端设备接入的目标PLMN，所述第一PLMN和第二PLMN均为第二网络设备支持的PLMN。
在第二方面的一种可能的设计中，该方法还包括：第二网络设备向第一网络设备发送第一指示信息，该第一指示信息用于指示第二小区为NTN小区，或者该第二指示信息用于第二小区为NTN小区且第二小区支持的PLMN为至少两个。
在第二方面的一种可能的设计中，该方法还包括：第二网络设备向第一网络设备发送第二小区的小区信息，所述第二小区的小区信息中包括第二小区支持的至少两个PLMN的信息，所述至少两个PLMN包括第一PLMN和第二PLMN。
在第二方面的一种可能的设计中，第一响应消息中还包括第二指示信息，该第二指示信息用于指示终端设备所在的位置与请求接入的所述第一PLMN不匹配。
在第二方面的一种可能的设计中，第二网络设备接收来自第一网络设备的第一请求消息具体可以包括：第二网络设备从核心网设备接收来自第一网络设备的第一请求消息。相应的，第二网络设备向第一网络设备发送第一响应消息具体可以包括：第二网络设备通过核心网设备向第一网络设备发送第一响应消息。
第三方面，本申请实施例提供一种通信方法，该方法可由终端设备执行，也可以由配置于终端设备的部件(例如芯片或者电路)执行，在本申请下文的描述中，将以终端设备 执行该方法为例进行说明。
该方法可以包括：终端设备接收来自第一网络设备的第三指示信息，该第三指示信息用于指示终端设备在上报第二小区的测量结果时携带终端设备的位置信息，所述第二小区为第二网络设备下的小区；终端设备向第一网络设备发送测量报告，该测量报告中包括终端设备的位置信息。
在第三方面的一种可能的设计中，该方法还包括：终端设备向第一网络设备发送第一指示信息，该第一指示信息用于指示第二小区为NTN小区，或者，该第一指示信息用于指示第二小区为NTN小区且第二小区支持的PLMN为至少两个。
在第三方面的一种可能的设计中，该方法还包括：终端设备向第一网络设备发送第二小区的小区信息，该第二小区的小区信息中包括第二小区支持的至少两个PLMN的信息。
第四方面，本申请实施例提供一种通信装置，该装置也可以具有实现上述第一方面或第一方面的任一种可能的设计中第一网络设备的功能，或者具有实现上述第二方面或第二方面的任一种可能的设计中第二网络设备的功能。该装置可以为网络设备，也可以为网络设备中包括的芯片。
该装置具有实现上述第三方面或第三方面的任一种可能的设计中终端设备的功能，或具有实现上述第四方面或第四方面的任一种可能的设计中第一网络设备的功能。该装置可以为终端设备，也可以为终端设备中包括的芯片。
上述通信装置的功能可以通过硬件实现，也可以通过硬件执行相应的软件实现，所述硬件或软件包括一个或多个与上述功能相对应的模块或单元或手段(means)。
在一种可能的设计中，该装置的结构中包括处理模块和收发模块，其中，处理模块被配置为支持该装置执行上述第一方面或第一方面的任一种设计中第一网络设备相应的功能，或者执行上述第二方面或第二方面的任一种设计中第二网络设备相应的功能，或者执行上述第三方面或第三方面的任一种可能的设计中终端设备相应的功能。收发模块用于支持该装置与其他通信设备之间的通信，例如该装置为第一网络设备时，可以向第二网络设备发送第一请求消息，以及接收来自第二网络设备的第一响应信息。该通信装置还可以包括存储模块，存储模块与处理模块耦合，其保存有装置必要的程序指令和数据。作为一种示例，处理模块可以为处理器，收发模块可以为收发器，存储模块可以为存储器，存储器可以和处理器集成在一起，也可以和处理器分离设置，本申请并不限定。
在另一种可能的设计中，该装置的结构中包括处理器，还可以包括存储器。处理器与存储器耦合，可用于执行存储器中存储的计算机程序指令，以使装置执行上述第一方面或第一方面的任一种可能的设计中的方法，或者执行上述第二方面或第二方面的任一种可能的设计中的方法，或者执行上述第三方面或第三方面的任一种可能的设计中的方法。可选地，该装置还包括通信接口，处理器与通信接口耦合。当装置为网络设备或终端设备时，该通信接口可以是收发器或输入/输出接口；当该装置为网络设备或终端设备中包含的芯片时，该通信接口可以是芯片的输入/输出接口。可选地，收发器可以为收发电路，输入/输出接口可以是输入/输出电路。
第五方面，本申请实施例提供一种芯片系统，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得该芯片系统实现上述第一方面或第一方面的任一种可能的设计中的方法，或实现上述第二方面或第二方面的任一种可能的设计中的方法，或实现上述第三方面或第三方面的任一种可能 的设计中的方法。
可选地，该芯片系统还包括接口电路，该接口电路用于交互代码指令至所述处理器。
可选地，该芯片系统中的处理器可以为一个或多个，该处理器可以通过硬件实现也可以通过软件实现。当通过硬件实现时，该处理器可以是逻辑电路、集成电路等。当通过软件实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现。
可选地，该芯片系统中的存储器也可以为一个或多个。该存储器可以与处理器集成在一起，也可以和处理器分离设置，本申请并不限定。示例性的，存储器可以是非瞬时性处理器，例如只读存储器ROM，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本申请对存储器的类型，以及存储器与处理器的设置方式不作具体限定。
第六方面，本申请实施例提供一种计算机可读存储介质，其上存储有计算机程序或指令，当该计算机程序或指令被执行时，使得计算机执行上述第一方面或第一方面的任一种可能的设计中的方法，或执行上述第二方面或第二方面的任一种可能的设计中的方法，或执行上述第三方面或第三方面的任一种可能的设计中的方法。
第七方面，本申请实施例提供一种计算机程序产品，当计算机读取并执行所述计算机程序产品时，使得计算机执行上述第一方面或第一方面的任一种可能的设计中的方法，或执行上述第二方面或第二方面的任一种可能的设计中的方法，或执行上述第三方面或第三方面的任一种可能的设计中的方法。
第八方面，本申请实施例提供一种通信系统，该通信系统包括上述各方面中所述的第一网络设备、第二网络设备和至少一个终端设备，其中第一网络设备可以为源网络设备，第二网络设备可以为目标网络设备。可选的，该通信系统中还可以包括核心网设备。
附图说明
图1a和图1b为本申请实施例适用的一种卫星通信系统的网络架构示意图；
图2为本申请实施例中卫星小区覆盖的不同区域对应不同的PLMN的示意图；
图3为本申请实施例提供的一种通信方法的流程示意图；
图4为本申请实施例中第一网络设备确定第二小区为NTN小区，或者确定第二小区为NTN小区且第二小区至少的PLMN为至少两个的示意图；
图5为本申请实施例提供的一种通信方法的一个示例；
图6为本申请实施例提供的一种通信方法的另一个示例；
图7为本申请实施例中第一小区的各个邻区的示意图；
图8为本申请实施例中第一网络设备指示终端设备上报位置信息的示意图；
图9为本申请实施例提供的一种通信装置的结构示意图；
图10为本申请实施例提供的一种通信装置的另一结构示意图；
图11为本申请实施例提供的另一种通信装置的结构示意图；
图12为本申请实施例提供的另一种通信装置的另一结构示意图。
具体实施方式
为了使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施例作进一步地详细描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：码分多址(code division multiple access，CDMA)系统、宽带码分多址(wideband code division multiple access，WCDMA)系统、通用分组无线业务(general packet radio service，GPRS)、LTE系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、第五代(5th generation，5G)系统或NR系统，或者应用于未来的通信系统或其它类似的通信系统等。
本申请实施例提供的技术方案可以应用于非陆地网络(NTN)通信系统，也可以应用于NTN与陆地网络(terrestrial networks，TN)混合部署的场景中。所述NTN通信系统可以包括卫星通信系统、高空平台(high altitude platform station，HAPS)通信系统或者其他非地面通信系统。
下面以NTN通信系统为卫星通信系统为例来详细说明本申请应用的网络架构。
请参考图1a，为本申请实施例适用的卫星通信系统的一种网络架构示意图，该网络架构中包括核心网设备110、无线接入网设备120、卫星130和至少一个终端设备(如图1a中所示的终端设备140)。作为一种示例，图1a中的核心网设备、无线接入网设备和终端设备位于地面，而卫星位于高空中。
其中，无线接入网设备通过无线或有线的方式与核心网设备通信。核心网设备与无线接入网设备可以是独立的不同的物理设备，也可以是将核心网设备的功能与无线接入网设备的逻辑功能集成在同一个物理设备上，还可以是一个物理设备上集成了部分核心网设备的功能和部分的无线接入网设备的功能。应理解，本申请实施例中所提及的无线接入网设备在不同的通信系统可对应不同的设备，例如在5G系统中对应5G中的接入网设备，例如gNB或者ng-eNB，在4G系统中对应4G中的接入网设备，例如eNB或者en-gNB。
无线接入网设备与终端设备之间的通信通过卫星转发信号，即卫星可以接收无线接入网设备的信号并将信号转发至地面形成卫星小区，进而为地面上的终端设备提供服务覆盖。此时，卫星相当于一个中继节点或转发器，因此，该场景也可以称为卫星的透明转发(transparent)形式。
在透明转发形式下，卫星小区可以是地面固定的(可以记为“固定小区”)，也可以随着卫星的移动而在地面上移动(可以记为“移动小区”)。对于“固定小区”的场景，卫星小区是地面固定的，是指卫星小区在地面上的覆盖是固定的，可以是在一段时间内是固定的，也可以是永久固定的。例如，对于高轨卫星，由于卫星相对地面保持静止，其形成的卫星小区一般相对地面也是固定的。对于低轨卫星，由于卫星相对地面移动，卫星可以通过调整其天线的发射角或是其它物理参数，使得形成的卫星小区相对地面是固定的。
对于“移动小区”的场景，卫星小区随着卫星的移动而移动，即当卫星移动时，卫星小区也跟随卫星在地面上移动。通常移动小区产生的原因是因为，随着卫星的移动，卫星并不会动态地调整波束的方向，进而导致卫星生成的波束在地面上的投影跟随着卫星的移动而移动。
应注意，本申请实施例对移动小区的存在场景不作具体限定。当卫星采用透明转发形式提供服务覆盖时，一种可能的移动小区的存在场景可以为：卫星与原无线接入网设备建立连接，随着卫星的移动，卫星转发的原无线接入网设备下的小区跟随卫星移动一段时间，即卫星与原无线接入网设备保持一段时间的连接；在某一时刻，卫星 与原无线接入网设备的连接由于距离较远、信号较弱等原因而断开，卫星连接至一个新的无线接入网设备，此后，卫星开始转发新的无线接入网设备的信号，形成新的卫星小区。可以理解，虽然卫星在不停地运行，但是由于地面的无线接入网设备的位置不变，因此，对于存在移动小区的场景，若卫星转发地面的某一无线接入网设备的信号，那么形成的该无线接入网设备下的卫星小区虽然也会随着卫星的运行，有一定范围的移动，但是该卫星小区的移动范围通常是围绕无线接入网设备的周边。
请参考图1b，为本申请实施例适用的卫星通信系统的另一种网络架构示意图，该网络架构中包括核心网设备110、卫星130和至少一个终端设备(如图1b中所示的终端设备140)。作为一种示例，图1b中的核心网设备和终端设备位于地面，而卫星位于高空中。
与图1a中所示的网络架构的区别之处在于，图1b所示的网络架构中，卫星上可以部署有无线接入网设备，例如基站。卫星可以自己生成小区信号，并转发至地面形成卫星小区，进而为地面上的终端设备提供服务覆盖。因此，该场景也可以称为卫星的再生(regenerative)形式。
在再生形式下，卫星小区随着卫星的移动而移动，即当卫星移动时，其生成的小区也跟随在地面上移动，因此可以称为“移动小区”。由于该“移动小区”是卫星自己生成的，因此该卫星“移动小区”可以跟随卫星的轨道在地面移动。一般情况下，当卫星移走后，后续会有新的卫星移过来，以保证尽可能的连续覆盖。新的卫星和之前的卫星的覆盖区域可以相同，也可以不同。可以理解，由于卫星的运行方向，波束发射方向，波束发射能力的不同，2个卫星的地面覆盖区域可能不一定完全相同。
尽管图1a和图1b中仅示出了一个终端设备，但应理解，一个无线接入网设备或卫星或核心网设备可以为一个或多个终端设备提供服务，本申请实施例对该卫星通信系统中包括的核心网设备、无线接入网设备、卫星和终端设备的数量不作限定。此外，所述终端设备可以是固定位置的，也可以是可移动的，本申请也不限定。
无线接入网设备与终端设备之间以及终端设备和终端设备之间，可以通过授权频谱(licensed spectrum)进行通信，也可以通过非授权频谱(unlicensed spectrum)进行通信，也可以同时通过授权频谱和非授权频谱进行通信。无线接入网设备和终端设备之间以及终端设备和终端设备之间可以通过6吉兆赫(gigahertz，GHz)以下的频谱进行通信，也可以通过6GHz以上的频谱进行通信，还可以同时使用6GHz以下的频谱和6GHz以上的频谱进行通信。本申请实施例对无线接入网设备和终端设备之间所使用的频谱资源不做限定。
本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着通信网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
本申请实施例中所涉及的小区可以是NTN小区，下面以NTN小区为卫星小区为例来详细说明本申请中的小区。
卫星小区除了具有上述有关移动性的特征外，另一个重要特征是覆盖大。一个卫星小区的覆盖直径可以达到几十到上千公里。因此，存在一个卫星小区覆盖了多个国家的地理区域，或者覆盖了多个运营商的服务区域的情形。一般来说，卫星可以通过广播多个PLMN的信息(如PLMN标识信息等)，或接入与移动性管理功能(access and mobility management  function，AMF)的信息(如AMF标识信息等)，或网络服务提供商(也可以称为网络识别信息，比如独立非公共网络(standalone non-public network，SNPN)标识信息，或者封闭接入组(closed access group，CAG)标识信息等)，或业务类型信息(比如切片标识)来指示其可以支持多个国家/运营商/网络服务提供商/业务类型的服务，终端设备可以根据自身位置、小区覆盖的区域信息与国家/运营商/网络服务提供商/业务类型之间的映射关系，确定出合适的国家/运营商/网络服务提供商/业务类型以接入。
举例来说，物理小区C覆盖国家A、国家B的地理区域。其中，国家A对应PLMN1/AMF1，国家B对应PLMN2/AMF2，则物理小区C可以广播PLMN1的信息、以及PLMN2的信息。可以理解，国家A对应PLMN1/AMF1是指，国家A部署的管理小区C的PLMN为PLMN1，或小区C所属的接入网设备连接的AMF为AMF1；国家B对应PLMN2/AMF2是指，国家B部署的管理小区C的PLMN为PLMN2，或小区C所属的接入网设备连接的AMF为AMF2。
如此，对于处于国家A且位于小区C的覆盖范围内的UE1，UE1可以通过PLMN1/AMF1接入小区C；或者说，UE1要接入小区C时，可以通过PLMN1/AMF1接入小区C；或者说，UE1要接入小区C时，UE1可以接入PLMN1/AMF1所对应的小区；或者说，UE1要接入小区C时，UE1可以接入的接入网设备所连接的核心网设备为AMF1，UE1可以接入的接入网设备属于PLMN1。
类似的，对于处于国家B且位于小区C的覆盖范围内的UE2，UE2可以通过PLMN2/AMF2接入小区C；或者说，UE2要接入小区C时，可以通过PLMN2/AMF2接入小区C；或者说，UE2要接入小区C时，UE2可以接入PLMN2/AMF2所对应的小区；或者说，UE2要接入小区C时，UE2可以接入的接入网设备所连接的核心网设备为AMF2，UE2可以接入的接入网设备属于PLMN2。
考虑到不同国家或运营商或网络服务提供商或业务类型的通信策略不同，可以将卫星小区区分为更细的粒度。例如，将卫星小区的整个服务覆盖区域划分为形状规则或不规则的多个区域，可以称之为虚拟小区或虚拟区域，从而更好的贴合不同国家的地理区域或不同运营商的服务区域或不同网络服务提供商的服务区域或不同业务类型的服务区域。如图2所示，同一个卫星小区下的不同的区域可以对应不同的PLMN，从而使得在同一个卫星小区下形成多个逻辑小区，进而可以根据不同的区域对终端设备的移动性进行有效管理。结合上述示例，从通信管理的角度，接入网设备和/或核心网设备会拒绝UE1从PLMN2接入，拒绝UE2从PLMN1接入。可以理解的，虚拟小区或虚拟区域的划分可以存在部分的重叠区域，也可以是完全隔离的，即无任何重叠区域。
本申请实施例还可以应用于小区切换的场景下，终端设备可能会因位置的移动、业务的变化、网络覆盖情况的改变或是其它原因而发生从源网络设备到目标网络设备的切换。其中，源网络设备是指终端设备在执行切换前接入的网络设备，或者说是切换前为终端设备提供服务的网络设备；目标网络设备是指终端设备需要切换至的网络设备，或者说是终端设备在成功执行切换后接入的网络设备，或者说是切换成功后为终端设备提供服务的网络设备。相应的，源小区是指终端设备在执行切换前接入的小区，该源小区为源网络设备覆盖下的小区，或者说源小区为源网络设备管辖的小区，或者说源小区属于源网络设备。目标小区是指终端设备在执行切换后接入的小区，该目标小区为目标网络设备覆盖下的小区，或者说目标小区为目标网络设备管辖的小区，或者说目标小区属于目标网络设备。
可以理解，本申请实施例中的源小区和/或目标小区可以是上面所介绍的NTN小区，例如卫星小区，也可以是其它的覆盖不同国家/运营商/网络服务提供商/业务类型的小区。即，源小区和/或目标小区的服务覆盖区域可以划分为多个区域，不同的区域可以对应不同的PLMN和/或AMF，形成不同的逻辑小区。
下面对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
1)本申请实施例中所涉及的终端设备，是一种具有无线收发功能的设备，可以部署在陆地上，包括室内或室外、手持、穿戴或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等。所述终端设备可以经无线接入网(radio access network，RAN)与核心网进行通信，与RAN交换语音和/或数据。所述终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。本申请的实施例对应用场景不做限定。终端设备有时也可以称为用户设备(user equipment，UE)、移动台和远方站等，本申请的实施例对终端设备所采用的具体技术、设备形态以及名称不做限定。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备或智能穿戴式设备等，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能头盔、智能首饰等。
本申请实施例中的终端设备还可以是作为一个或多个部件或者单元而内置于车辆的车载模块、车载模组、车载部件、车载芯片或者车载单元，车辆通过内置的所述车载模块、车载模组、车载部件、车载芯片或者车载单元可以实施本申请的方法。
2)本申请实施例中所涉及的无线接入网设备，是网络中用于将终端设备接入到无线网络的设备。所述无线接入网设备可以为无线接入网中的节点，又可以称为基站，还可以称为RAN节点。在本申请中，无线接入网设备是指部署在地面上的无线接入网设备，在下文的描述中，无线接入网设备可以简称为接入网设备或网络设备。
所述接入网设备可以包括LTE系统或演进的LTE系统(LTE-Advanced，LTE-A)中的演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，如传统的宏基站eNB和异构网络场景下的微基站eNB，或者也可以包括5G系统或NR系统中的下一代节点B(next generation node B，gNB)，或者也可以包括无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、传输接收点(transmission reception point，TRP)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(base band unit，BBU)、基带池BBU pool， 或无线保真(wireless fidelity，WiFi)接入点(access point，AP)、接入回传一体化(integrated access and backhaul，IAB)节点等，再或者也可以包括云接入网(cloud radio access network，CloudRAN)系统中的集中式单元(centralized unit，CU)和/或分布式单元(distributed unit，DU)，本申请实施例并不限定。
例如，在一种网络结构中，网络设备可以为CU节点、或DU节点、或为包括CU节点和DU节点的接入网设备。进一步地，CU节点可以划分为控制面(CU-CP)和用户面(CU-UP)，其中CU-CP负责控制面功能，主要包含无线资源控制(radio resource control，RRC)和分组数据汇聚协议(packet data convergence protocol，PDCP)-C，PDCP-C主要负责控制面数据的加解密，完整性保护，数据传输等。CU-UP负责用户面功能，主要包含服务数据适配协议(service data adaptation protocol，SDAP)和PDCP-U，SDAP主要负责将核心网的数据进行处理并将流(flow)映射到承载(bearer)，PDCP-U主要负责数据面的加解密，完整性保护，头压缩，序列号维护，数据传输等。CU-CP与CU-UP可通过E1接口连接。CU-CP代表CU通过Ng接口和核心网连接，通过F1-C(控制面)和DU连接。CU-UP通过F1-U(用户面)和DU连接。当然还有一种可能的实现是PDCP-C也在CU-UP。
3)本申请实施例中所涉及的核心网设备，是指为终端设备提供业务支持的核心网(core network，CN)中的设备。目前，一些核心网设备的举例包括：AMF实体、会话管理功能(session management function，SMF)实体、用户面功能(user plane function，UPF)实体等。其中，AMF实体用于负责终端设备的接入管理和移动性管理；SMF实体用于负责会话管理，如用户的会话建立等；UPF实体是用户面的功能实体，主要用于负责连接外部网络。应注意，本申请中的实体也可以称为网元或功能实体，即AMF实体也可以称为AMF网元或AMF功能实体，SMF实体也可以称为SMF网元或SMF功能实体。在本申请下文的描述中，核心网设备可以是指AMF。
4)本申请实施例中所涉及的卫星，是指位于卫星上的网络设备，为了便于说明，可以将“卫星上的网络设备”简称为“卫星”。所述卫星可以是低轨卫星(low earth orbiting，LEO)或者中轨卫星或者其他位于高空中移动的网络设备。一般来说，按照卫星的轨位高度，卫星通信系统中的卫星可分为高轨卫星(geostationary earth orbiting，GEO)、低轨卫星(LEO)和中轨卫星三类。其中，高轨卫星又可以称为静止卫星，高轨卫星的运行速度与地球自转速度相同，因此，高轨卫星相对地面保持静止状态，相应地，高轨卫星形成的卫星小区也是静止的。低轨卫星又可以称为近地轨道卫星，低轨卫星相对地面移动速度较快，因此，低轨卫星形成的卫星小区可随着卫星的移动而移动。中轨卫星是指位于轨道高度位于高轨卫星与低轨卫星之间的卫星。
5)需要说明的是，本申请实施例中的术语“系统”和“网络”可被互换使用。“多个”是指两个或两个以上，鉴于此，本申请实施例中也可以将“多个”理解为“至少两个”。“至少一个”，可理解为一个或多个，例如理解为一个、两个或更多个。例如，包括至少一个，是指包括一个、两个或更多个，而且不限制包括的是哪几个。例如，包括A、B和C中的至少一个，那么包括的可以是A、B、C，A和B，A和C，B和C，或A和B和C。同理，对于“至少一种”等描述的理解，也是类似的。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，字符“/”，如无特殊说明，一般表示前后关联对象是一种“或”的关系。
除非有相反的说明，本申请实施例提及“第一”、“第二”等序数词用于对多个对象进行区分，不用于限定多个对象的顺序、时序、优先级或者重要程度，并且“第一”、“第二”的描述也并不限定对象一定不同。
可以理解，本申请实施例中，终端设备和/或网络设备可以执行本申请实施例中的部分或全部步骤，这些步骤或操作仅是示例，本申请实施例还可以执行其它操作或者各种操作的变形。此外，各个步骤可以按照本申请实施例呈现的不同的顺序来执行，并且有可能并非要执行本申请实施例中的全部操作。
本申请实施例以PLMN和AMF实体为例对涉及的方法进行说明，但本发明并不限于PLMN和AMF实体。PLMN还可以是其他通信网络或实现通信网络部分功能的设备。AMF实体还可以是其他可实现移动管理功能的实体或设备，或在通信网络中实现类似功能的实体或设备。
请参考图3，为本申请实施例提供的一种通信方法的流程示意图，该方法包括：
步骤S301、第一网络设备向第二网络设备发送第一请求消息，该第一请求消息用于请求将终端设备接入到第二网络设备下的第二小区，该第一请求消息中包括终端设备的位置信息和第一PLMN的信息，该第一PLMN为第一网络设备确定的终端设备接入的目标PLMN。
可选的，第一请求消息还可以包括终端设备的移动性限制信息，该移动性限制信息可以包括终端设备允许接入的国家/运营商/网络服务提供商/业务类型的信息。比如，移动性限制信息可以指示终端设备允许接入的PLMN信息。
相应的，第二网络设备可以接收来自第一网络设备的第一请求消息。
本申请实施例中，所述第一网络设备可以为源网络设备，所述第二网络设备可以为目标网络设备。所述第一小区可以为源小区，该第一小区受第一网络设备的管理，或者说第一小区为第一网络设备下的小区或第一小区属于第一网络设备。所述第二小区可以为目标小区，该第二小区受第二网络设备的管理，或者说第二小区为第二网络设备下的小区或第二小区属于第二网络设备。第一小区与第二小区可以是相邻的小区，而且第一小区和第二小区可以为NTN小区。
所述终端设备的位置信息可以包括经度信息、纬度信息、高度信息中的一种或多种，或者也可以为其它形式的位置信息，本申请并不限定。在一种可能的实施方式中，所述位置信息可以用来描述一个具体的位置点，如终端设备当前所处的位置点的经度、纬度和高度信息。在另一种可能的实施方式中，所述位置信息还可以用于描述一个大致的区域范围，即终端设备当前所处的一块区域范围，如该区域范围可以用中心点的经度、纬度和高度，再加上该区域范围的直径或半径等参数来表示。在又一种可能的实施方式中，所述位置信息或区域信息可以用标识来表示，如所述标识可以是index或ID，所述标识与位置信息或区域信息之间的映射关系可以是协议约定的，或者是网络设备/核心网设备发送给终端设备的，也就是说，终端设备、网络设备或核心网设备可以根据标识确定出相应的位置或区域。当然，该区域范围的描述也可以有其他的表现形式，本申请不再逐一举例。
进一步地，所述终端设备的位置信息可以是第一网络设备从终端设备处接收的。例如，第一网络设备可以接收终端设备上报的测量报告，该测量报告中可以包括终端设备测量到的自身的位置信息。或者，所述终端设备的位置信息可以是第一网络设备从其他网络设备 处接收的，例如，第一网络设备可以从核心网设备处接收该终端设备的位置信息。再或者，所述终端设备的位置信息也可以是第一网络设备自行确定的，例如，第一网络设备可以对终端设备进行位置定位，进而得到终端设备的位置信息。所述终端设备的位置信息也可以是第一网络设备通过其它方式获取到的，本申请并不限定。
所述第一PLMN的信息可以包括第一PLMN的标识信息，例如第一PLMN的ID(即PLMN-identifier)。类似的，下文中所述的第二PLMN的信息可以包括第二PLMN的标识信息，例如第二PLMN的ID(即PLMN-identifier)。可以理解的，本申请实施例以PLMN进行示例，也可以扩展到国家/运营商/网络服务提供商/业务类型，本申请并不限定。
可选的，在第一网络设备向第二网络设备发送第一请求消息之前，如图4所示，第一网络设备可以确定第二小区为NTN小区，或者确定第二小区为NTN小区且该第二小区支持的PLMN为至少两个，或者确定第二小区支持的PLMN为至少两个，且存在区域和PLMN的对应关系。
作为一种可能的实现方式，如步骤S401a、步骤S401b所示，第一网络设备可以从终端设备或第二网络设备接收第一指示信息，该第一指示信息用于指示第二小区为NTN小区，或者该第一指示信息用于指示第二小区为NTN小区且该第二小区支持的PLMN为至少两个，或者该第一指示信息用于指示第二小区支持的PLMN为至少两个，且存在区域和PLMN的对应关系。可以理解，所述第二小区支持的PLMN为至少两个是指，第二小区支持的PLMN的数量大于或等于两个，或者说第二小区支持的PLMN有多个。如此，通过上述方式，可以使得第一网络设备获知第二网络设备下的第二小区为NTN小区，以及该第二小区支持的PLMN为至少两个。可以理解，所述第二小区存在区域和PLMN的对应关系可以是指，第二小区中处于不同区域的终端设备需要从对应的PLMN接入或者切入第二小区。可以理解的，本申请实施例以NTN小区进行示例，也可以扩展到支持多个国家/运营商/网络服务提供商/业务类型的小区，本申请并不限定。
示例性的，终端设备可以通过读取第二小区的系统消息，得知第二小区是NTN小区，或者得知第二小区为NTN小区且该第二小区支持的PLMN为至少两个，或者得知第二小区支持的PLMN为至少两个，且存在区域和PLMN的对应关系。进而，终端设备可以向第一网络设备发送所述第一指示信息。
作为又一种可能的实现方式，如步骤S402a、步骤402b所示，第一网络设备可以从终端设备或第二网络设备接收第二小区的小区信息，该第二小区的小区信息中可以包括第二小区支持的至少两个PLMN的信息。可选的，第二小区的小区信息还可以指示第二小区为NTN小区，或者可以指示第二小区存在区域和PLMN的对应关系。如此，第一网络设备根据第二小区的小区信息，从第二小区支持的至少两个PLMN中确定出终端设备接入的第一PLMN，从而确保第一请求消息中携带的第一PLMN为第二网络设备支持的PLMN。
可选的，在第一网络设备确定第二小区为NTN小区，或者确定第二小区为NTN小区且该第二小区支持的PLMN为至少两个，或者确定第二小区支持的PLMN为至少两个，且存在区域和PLMN的对应关系后，如图4中步骤S404所示，第一网络设备可以向终端设备发送第三指示信息，该第三指示信息用于指示终端设备在上报所述第二小区的测量结果时携带终端设备的位置信息。后续，终端设备可以向第一网络设备发送测量报告，该测量报告中包括第二小区的测量结果以及终端设备的位置信息。可选的，所述第三指示信息可以包含在第一网络设备向终端设备发送的位置测量配置信息中，该位置测量配置信息用 于指示终端设备进行位置测量。如此，终端设备可根据接收到的位置测量配置信息进行位置测量，并根据其中第三指示信息的指示在上报第二小区的测量结果时，将测量到的自身的位置信息一起通过测量报告发送给第一网络设备。
需要说明的是，图4所示仅为一种示意，本申请实施例对第一网络设备接收第一指示信息和接收第二小区的小区信息的先后顺序不作限定。而且，当第一网络设备从终端设备接收第一指示信息时，第一网络设备可以仍从终端设备接收第二小区的小区信息，也可以从第二网络设备接收第二小区的小区信息，并不限定。类似的，当第一网络设备从第二网络设备接收第一指示信息时，第一网络设备可以仍从第二网络设备接收第二小区的小区信息，也可以从终端设备接收第二小区的小区信息也不限定。
所述第二小区支持的至少两个PLMN中包括第一PLMN和第二PLMN，相应的，第二小区至少覆盖第一PLMN对应的第一区域和第二PLMN对应的第二区域。由于第二小区支持的PLMN为至少两个，因此，当第二小区支持的PLMN的数量为两个时，第一PLMN和第二PLMN是第二小区支持的全部PLMN；当第二小区支持的PLMN的数量大于两个时，第一PLMN和第二PLMN是第二小区支持的全部PLMN中的其中两个PLMN，即第二小区除第一PLMN和第二PLMN之外还可以支持其他的PLMN，本申请并不限定。
步骤S302、第二网络设备根据终端设备的位置信息，确定是否允许终端设备的接入/切换。
具体的，第二网络设备根据终端设备的位置信息，确定该终端设备是否位于第一PLMN对应的第一区域内。若确定终端设备位于第一PLMN对应的第一区域内，第二网络设备可以接受该终端设备的接入/切换请求。可选的，第二网络设备也可以拒绝该终端设备的接入/切换请求。比如，第二网络设备基于其它的切换判决因素(比如第二小区的负载较高)，进一步判断后确定拒绝该终端设备的接入/切换请求。
若确定终端设备位于第一PLMN对应的第一区域之外，且位于第二PLMN对应的第二区域之内，第二网络设备可以拒绝该终端设备的接入/切换请求。进一步的，第二网络设备可以根据终端设备的移动性限制信息，确定终端设备是否支持第二PLMN。若终端设备支持第二PLMN，第二网络设备将第二PLMN确定为允许终端设备接入的目标PLMN，第一PLMN和第二PLMN均为第二网络设备支持的PLMN。
步骤S303、第二网络设备向第一网络设备发送第一响应消息。相应的，第一网络设备可以接收来自第二网络设备的第一响应消息。
可选的，该第一响应消息包括第二PLMN的信息，该第二PLMN为第二网络设备允许终端设备接入的目标PLMN。即，第二网络设备可以在第一响应消息中携带允许终端设备接入的目标PLMN的信息。当终端设备所在的位置位于第二PLMN对应的第二区域内，且终端设备支持第二PLMN时，第二网络设备可以确定第二PLMN为允许终端设备接入的目标PLMN，该第二PLMN与终端设备所在的位置相匹配，是终端设备当前所在位置所属的区域对应的PLMN。如此，可使第一网络设备根据该第二PLMN重新发起切换请求，将终端设备从其位置所属的区域对应的第二PLMN接入第二小区，从而有效提高切换成功率。
可选的，该第一响应消息中也可以包括第二指示信息，该第二指示信息用于指示终端设备所在的位置与终端设备请求接入的第一PLMN不匹配。所述终端设备所在的位置与终端设备请求接入的第一PLMN不匹配可以是指，终端设备所在的位置不在请求接入的第一 PLMN对应的第一区域的范围内。如此，第一网络设备接收到该第二指示信息后，可以确定是因为终端设备的位置与之前确定接入的第一PLMN不匹配，所以导致了第二网络设备拒绝终端设备接入第二小区。所述第二指示信息可以用于指示切换失败原因，该第二指示信息也可以具有其他的表达方式，例如用于指示请求的PLMN无效或错误等。
可以看出，本申请实施例中，由于第一网络设备可以从终端设备或第二网络设备接收第二小区的小区信息，并根据第二小区的小区信息确定请求接入的PLMN，可以使得终端设备接入的PLMN一定是第二网络设备支持的PLMN，从而避免因第二网络设备不支持接入的PLMN而导致切换失败的其他情形发生。
需要说明的是，所述第一响应消息中可以包括目标PLMN的信息和/或第二指示信息。也就是说，目标PLMN的信息和第二指示信息都不是第一响应消息中必选的信息，第一响应消息中可以包括目标PLMN的信息和第二指示信息中的其中一种或两种信息，而且这两种信息均具有指示切换失败的作用。
可选的，若终端设备所在的位置位于请求接入的第一PLMN对应的第一区域内，则第二网络设备可以允许终端设备从第一PLMN接入第二小区，此时，所述第一响应消息也可以称为切换请求确认消息或切换命令消息或重配置消息，或具有其他名称，本申请并不限定。
本申请实施例中，第一网络设备可以在第一请求消息中携带终端设备的位置信息，由第二网络设备根据第一请求消息中的终端设备的位置信息进行切换/接入判决，确定是否允许终端设备切换/接入到第二小区。当终端设备请求接入第一PLMN，而终端设备所在的位置位于第一PLMN对应的第一区域之外时，第二网络设备可以确定终端设备请求的PLMN错误，或者说终端设备所在的位置与请求接入的PLMN不匹配，需要拒绝终端设备的切换请求，即不允许终端设备从第一PLMN切换/接入至第二小区。此时，所述第一响应消息也可以称为切换失败消息。
图5和图6为本申请实施例中提供的一种通信方法中有关切换过程的两种具体示例。其中，图5所示的具体示例对应于第一网络设备与第二网络设备之间存在直接连接的接口的场景，第一网络设备和第二网络设备可以基于该直接连接的接口执行切换过程。该直接连接的接口例如可以是Xn接口，此时，切换过程也可以称为基于Xn接口的切换(Xn based HO)或是Xn切换过程。图5所示的方案也适用于直接连接的接口是X2接口的情形，本申请不作限定。图6所示的具体示例对应于第一网络设备与第二网络设备之间不存在直接连接的接口的场景，第一网络设备和第二网络设备可以基于接入网设备与核心网设备之间的接口执行切换过程。所述核心网设备例如可以是指AMF，所述接入网设备与核心网设备之间的接口例如可以是NG接口，此时，切换过程也可以称为基于NG接口的切换(NG based HO)或是NG切换过程。图6所示的方案也适用于接入网设备与核心网设备之间的接口是S1接口的情形(对应的，此时核心网设备可以为移动性管理实体(mobility management entity，MME)，本申请不作限定。
如图5所示，在步骤S501中，UE可以向第一基站发送测量报告。可选的，该测量报告中包括UE的位置信息。
在步骤S502中，第一基站可以向第二基站发送切换请求消息，该切换请求消息中包括UE的位置信息以及第一基站确定的UE接入的PLMN1的信息。应注意，此处，切换请 求消息中包括的UE的位置信息可以是第一基站从该UE上报的测量报告中得到的，也可以第一基站通过其他方式获取的，例如对UE的位置进行定位得到，或是从其他网络设备处获取，并不限定。PLMN1是第二基站支持的PLMN，该PLMN1可以是第一基站根据第二基站下的第二小区的小区信息确定的，或者也可以是第一基站根据第二小区的小区信息，并结合UE的移动性限制信息和/或签约信息确定的。可选的，切换请求消息还可以包括UE的移动性限制信息。关于所述小区信息和移动性限制信息可参考上文中步骤S301中的相关描述，此处不再赘述。
进而，在步骤S503中，第二基站接收到切换请求消息后，可根据UE的位置信息，判断是否允许UE接入/切换到第二小区。
具体的，在步骤S504a中，若UE所在的位置位于第二小区覆盖的第一区域之外，该第一区域对应于UE要接入的PLMN1，那么第二基站可以确定切换失败，需要拒绝该UE的切换请求，即拒绝该UE从PLMN1接入第二小区。相应的，第二基站可以在步骤S504a中向第一基站发送切换失败消息，并在切换失败消息中携带第二指示信息，该第二指示信息用于指示UE所在的位置与第一PLMN不匹配，即指示切换失败原因。
或者，若第二基站确定终端设备位于PLMN1对应的第一区域之外，且位于PLMN2对应的第二区域之内，第二网络设备可以根据终端设备的移动性限制信息，确定终端设备是否支持PLMN2。若终端设备支持PLMN2，第二基站可以在步骤S504a中向第一基站发送切换失败消息，并在切换失败消息中携带PLMN2的信息和/或第二指示信息。所述PLMN2为第二基站确定的允许UE接入的目标PLMN，该PLMN2为该UE所在的位置所属的第二区域对应的PLMN。
如此，针对该UE，第一基站后续可以重新发起接入到第二PLMN的切换请求，以使UE成功切换至第二小区。所述切换失败消息也可以称为切换准备失败消息，或者具有其他名称，并不限定。
在步骤S503中，若UE所在的位置位于第二小区覆盖的第一区域之内，该第一区域对应于UE要接入的PLMN1，则第二基站可以接受UE的切换请求，确定允许UE从PLMN1接入第二小区。于是，第二基站可以在步骤S504b中向第一基站发送切换请求确认消息，后续在步骤S505中，第一基站可以进一步向UE发送RRC重配置消息。
如图6所示，在步骤S601中，UE可以向第一基站发送测量报告。可选的，该测量报告中包括UE的位置信息。
在步骤S602中，第一基站可以向AMF1发送第一切换请求消息，该第一切换请求消息中可以包括UE的位置信息以及第一基站确定的UE要接入的PLMN1的信息。该第一切换请求消息可以是HO required消息或其他消息，不作限定。该第一切换请求消息中包括的UE的位置信息可以是源基站从该UE上报的测量报告中得到的，也可以源基站通过其他方式获取的，不作限定。PLMN1是第二基站支持的PLMN，该PLMN1可以是第一基站根据第二基站下的第二小区的小区信息确定的，或者也可以是第一基站根据第二小区的小区信息，并结合UE的移动性限制信息和/或签约信息确定的。可选的，切换请求消息还可以包括UE的移动性限制信息。关于所述小区信息和移动性限制信息可参考上文中步骤S301中的相关描述，此处不再赘述。
作为又一种可能的实现方式，步骤S602可以替换为步骤S602’，第一基站可以向AMF1发送第一切换请求消息，该第一切换请求消息中可以包括用于指示AMF1提供UE的位置 信息的指示信息，以及第一基站确定的UE接入的PLMN1的信息。AMF1可以根据用于指示AMF1提供UE的位置信息的指示信息，获取UE的位置信息，并在步骤S603的第二切换请求消息中携带UE的位置信息。AMF1获取UE的位置信息，可以是AMF1接收的该UE上报的位置信息，也可以是AMF1通过该UE的位置服务器获取的，又可以是通过其他方式获取的，不作限定。可选的，第一切换请求消息还可以包括终端设备的移动性限制信息。
进而，在步骤S603中，AMF1可以向第二基站发送第二切换请求消息，该第二切换请求消息中可以包括UE的位置信息以及第一基站确定的UE要接入的PLMN1的信息。该第二切换请求消息可以是HO request消息或其他消息，不作限定。应注意，此处，第二切换请求消息中包括的UE的位置信息是AMF1从第一切换请求消息中得到的，也可以是AMF1通过其他方式获取的，例如对UE的位置进行定位得到，或是从其他网络设备处获取，并不限定。可选的，第二切换请求消息还可以包括终端设备的移动性限制信息。
进而，在步骤S604中，第二基站接收到第二切换请求消息后，可根据UE的位置信息，判断是否允许该UE接入/切换到第二小区。
具体的，在步骤S604a中，若UE所在的位置位于第二小区覆盖的第一区域之外，该第一区域对应于UE要接入的PLMN1，那么第二基站可以确定切换失败，需要拒绝该UE的切换请求，即拒绝该UE从PLMN1接入第二小区。相应的，第二基站可以在步骤S605a中向AMF1发送第一切换失败消息，并在第一切换失败消息中携带第二指示信息，该第二指示信息用于指示UE所在的位置与第一PLMN不匹配，即指示切换失败原因。
或者，若第二基站确定终端设备位于PLMN1对应的第一区域之外，且位于PLMN2对应的第二区域之内，第二网络设备可以根据UE的移动性限制信息，确定终端设备是否支持PLMN2。若终端设备支持PLMN2，第二基站可以在步骤S605a中向AMF1发送第一切换失败消息，并在第一切换失败消息中携带PLMN2的信息和/或第二指示信息。该PLMN2为第二基站确定的允许UE接入的目标PLMN，该PLMN2为该UE所在的位置所属的区域对应的PLMN。
后续，在步骤S606a中，AMF1可以向第一基站发送第二切换失败消息，在该第二切换失败消息中携带PLMN2的信息和/或第二指示信息。该第二切换失败消息可以是handover preparation failure消息或其他消息，不作限定。相应的，第一基站可以接收该第二切换失败消息。
如此，针对该UE，第一基站可以重新发起请求接入到第二PLMN的切换请求，以使UE成功切换至第二小区。所述第二切换失败消息也可以称为切换准备失败消息，或者具有其他名称，并不限定。
在步骤S604中，若UE所在的位置位于第二小区覆盖的第一区域之内，该第一区域对应于UE要接入的PLMN1，那么第二基站可以接受UE的切换请求，确定允许UE从PLMN1接入第二小区。于是，第二基站可以在步骤S605b中向AMF1发送切换请求确认消息，进而在步骤S606b中，AMF1可以向第一基站发送切换命令消息，后续在步骤S607中第一基站可以进一步向UE发送RRC重配置消息。
需要说明的是，图6所示的具体示例是以第一基站与第二基站属于同一个AMF为例进行说明的，即图中所示的AMF1。可以理解，第一基站与第二基站也可以属于不同的AMF，此时切换流程还可以包括AMF间的切换流程，且AMF间交互的用于切换的消息中也包括 UE的位置信息、允许UE接入的目标PLMN的信息、第二指示信息等信息中的一种或多种，在此不再赘述。
如前所述，第二小区为第一小区的邻区。本申请实施例中，第一小区还可能具有其他邻区。示例性的，如图7所示，第一小区具有第二小区和第三小区两个邻区，且第一小区、第二小区和第三小区均为NTN小区。
其中，第一小区为第一网络设备下的小区，第一小区仅支持PLMN1，即第一小区支持的PLMN为一个。应注意，本申请实施例对第一小区支持的PLMN的数量不作具体限定，此处仅为一种示例。第二小区为第二网络设备下的小区，第二小区支持PLMN1和PLMN2，且PLMN1对应第一区域，PLMN2对应第二区域，即第二小区支持的PLMN为两个，第二小区覆盖PLMN1对应的第一区域和PLMN2对应的第二区域。第三小区为第三网络设备下的小区，第三小区仅支持PLMN1，即第三小区支持的PLMN为一个。
基于第一小区的上述邻区关系，如图8所示，第一网络设备可以与第二网络设备、第三网络设备分别交互各自小区的小区信息，并根据第一小区的各个邻区支持的PLMN的情况向终端设备发送指示信息，指示终端设备是否需要上报其位置信息。
具体的，在步骤S801中，第一网络设备可以从第二网络设备接收第二小区的小区信息，该第二小区的小区信息中包括第二小区支持的PLMN的信息(如第一PLMN的信息和第二PLMN的信息)。可选的，该第二小区的小区信息还可以包括第二小区的标识信息、第二小区的频点信息和物理小区标识(physical cell identify，PCI)等信息的至少一种。可选的，第二小区的小区还可以指示第二小区为NTN小区，或者可以指示第二小区存在区域和PLMN的对应关系。如此，第一网络设备可根据第二小区的小区信息，确定第二小区支持的PLMN有多个。
可选的，第一网络设备也可以向第二网络设备发送第一小区的小区信息，不再赘述。
在步骤S802中，第一网络设备可以从第三网络设备接收第三小区的小区信息，该第三小区的小区信息中包括第三小区支持的PLMN信息(如第一PLMN的信息)。可选的，该第三小区的小区信息还可以包括第三小区的标识信息、第三小区的频点信息和PCI等信息。如此，第一网络设备可根据第三小区的小区信息，确定第三小区支持的PLMN为一个。
可选的，第一网络设备也可以向第三网络设备发送第一小区的小区信息，不再赘述。
由此可知，由于第二小区支持的PLMN有多个，第三小区支持的PLMN为一个，当第一网络设备确定将终端设备切换到第二小区时，第一网络设备需要根据终端设备的位置信息，确定切换时的目标PLMN的信息。以第一网络设备通过终端设备发送的位置信息获取终端设备的位置为例，当终端设备的测量报告中包括第二小区的测量结果时，终端设备需要上报自身的位置信息，以便于目标网络设备根据终端设备的位置信息来判断其接入是否合理，如判断终端设备所在的位置是否与其请求的PLMN相匹配。而当终端设备的测量报告中仅包括第三小区的测量结果时，终端设备不需要上报自身的位置信息。
鉴于此，在步骤S803中，第一网络设备可以向终端设备发送指示信息，该指示信息用于指示终端设备是否需要上报位置信息。或者说，该指示信息用于指示终端设备在上报测量报告时是否需要上报位置信息，或者用于指示终端设备在其测量报告中上报位置信息的条件。所述上报位置信息的条件例如可以是当测量报告中包括哪些小区的测量结果时终端设备需要上报其位置信息。其中所述小区可以通过小区的频点信息，或者频点信息和PCI 来识别。可选的，所述指示信息可以包含在第一网络设备发送给终端设备的测量配置信息或者位置测量配置信息中，其中位置测量配置信息用于指示终端设备进行位置测量。
在步骤S804中，终端设备接收到所述指示信息后，可以确定是否需要上报其位置信息，并向第一网络设备发送测量报告。
需要说明的是，所述指示信息可以是基于小区(per cell)配置的。例如，第三指示信息可以对应于第二小区，第四指示信息可以对应于第三小区。第一网络设备可以通过第三指示信息指示在上报第二小区的测量结果时需要上报位置信息，比如，第三指示信息结合第二小区的频点信息和PCI发送给终端设备；第一网络设备可以通过第四指示信息指示在上报第三小区的测量结果时不需要上报其位置信息。如此，终端设备可根据需要在测量报告中上报的小区的测量结果，以及第三指示信息和第四指示信息，确定当测量报告中包括第二小区的测量结果时需要上报位置信息，而当测量报告中仅包括第三小区的测量结果时不需要上报位置信息。
本申请实施例还提供一种通信装置，请参考图9，为本申请实施例提供的一种通信装置的结构示意图，该通信装置900包括：收发模块910和处理模块920。该通信装置可用于实现上述任一方法实施例中涉及网络设备(如第一网络设备或者第二网络设备)的功能。例如，该通信装置可以是网络设备或网络设备中包括的芯片或电路。
示例性的，当该通信装置执行图3中所示的方法实施例中对应第一网络设备的操作或者步骤时，处理模块920用于，生成第一请求消息，该第一请求消息用于请求将终端设备接入到第二网络设备下的第二小区，该第一请求消息中包括所述终端设备的位置信息和第一PLMN的信息，该第一PLMN为所述第一网络设备确定的所述终端设备接入的目标PLMN；收发模块910用于，向第二网络设备发送第一请求消息，以及接收来自所述第二网络设备的第一响应消息，该第一响应消息包括第二PLMN的信息，该第二PLMN为第二网络设备允许终端设备接入的目标PLMN；其中，终端设备所在的位置位于第一PLMN对应的第一区域之外，且位于第二PLMN对应的第二区域之内，第一PLMN和第二PLMN均为所述第二网络设备支持的PLMN。
在一种可能的设计中，收发模块910还用于，从终端设备或者第二网络设备接收第一指示信息，该第一指示信息用于指示第二小区为NTN小区，或者，用于指示第二小区为NTN小区且第二小区支持的PLMN为至少两个。
在一种可能的设计中，收发模块910还用于，从终端设备或者第二网络设备接收第二小区的小区信息，该第二小区的小区信息中包括第二小区支持的至少两个PLMN的信息，所述至少两个PLMN包括第一PLMN和第二PLMN。
在一种可能的设计中，所述第一响应消息中还包括第二指示信息，该第二指示信息用于指示终端设备所在的位置与请求接入的第一PLMN不匹配。
在一种可能的设计中，收发模块910还用于，向终端设备发送第三指示信息，该第三指示信息用于指示终端设备在上报第二小区的测量结果时携带终端设备的位置信息。
在一种可能的设计中，收发模块910具体用于，通过核心网设备向所述第二网络设备发送所述第一请求消息；以及从核心网设备接收来自第二网络设备的第一响应消息。
当该通信装置执行图3中所示的方法实施例中对应第二网络设备的操作或步骤时，收发模块910用于，接收来自第一网络设备的第一请求消息，该第一请求消息用于请求将终 端设备接入到第二网络设备下的第二小区，该第一请求消息中包括终端设备的位置信息和第一PLMN的信息，该第一PLMN为第一网络设备确定的终端设备接入的目标PLMN；处理模块920用于，若终端设备所在的位置位于第一PLMN对应的第一区域之外，且位于第二PLMN对应的第二区域之内，则将第二PLMN确定为允许终端设备接入的目标PLMN，所述第一PLMN和所述第二PLMN均为第二网络设备支持的PLMN；收发模块910还用于，向第一网络设备发送第一响应消息，该第一响应消息包括第二PLMN的信息。
在一种可能的设计中，收发模块910还用于，向第一网络设备发送第一指示信息，该第一指示信息用于指示第二小区为NTN小区，或者，用于指示第二小区为NTN小区且第二小区支持的PLMN为至少两个。
在一种可能的设计中，收发模块910还用于，向第一网络设备发送第二小区的小区信息，该第二小区的小区信息中包括第二小区支持的至少两个PLMN的信息，所述至少两个PLMN包括第一PLMN和第二PLMN。
在一种可能的设计中，第一响应消息中还包括第二指示信息，该第二指示信息用于指示终端设备所在的位置与请求接入的第一PLMN不匹配。
在一种可能的设计中，收发模块910具体用于，从核心网设备接收来自第一网络设备的第一请求消息；以及，通过核心网设备向第一网络设备发送第一响应消息。
应理解，该通信装置中涉及的处理模块920可以由至少一个处理器或处理器相关电路组件实现，收发模块910可以由至少一个收发器或收发器相关电路组件或通信接口实现。该通信装置中的各个模块的操作和/或功能分别为了实现图3、图4、图5、图6、或图8中所示方法的相应流程，为了简洁，在此不再赘述。可选的，该通信装置中还可以包括存储模块，该存储模块可以用于存储数据和/或指令，收发模块910和/或处理模块920可以读取存取模块中的数据和/或指令，从而使得通信装置实现相应的方法。该存储模块例如可以通过至少一个存储器实现。
上述存储模块、处理模块和收发模块可以分离存在，也可以全部或者部分模块集成，例如存储模块和处理模块集成，或者处理模块和收发模块集成等。
请参考图10，为本申请实施例中提供的一种通信装置的另一结构示意图。该通信装置可具体为一种网络设备，例如基站，用于实现上述任一方法实施例中涉及网络设备(如第一网络设备或者第二网络设备)的功能。
该网络设备包括：一个或多个射频单元，如远端射频单元(remote radio unit，RRU)1001和一个或多个基带单元(baseband unit，BBU)(也可称为数字单元，digital unit，DU)1002。所述RRU 1001可以称为收发单元、收发机、收发电路、或者收发器等等，其可以包括至少一个天线10011和射频单元10012。所述RRU 1001部分主要用于射频信号的收发以及射频信号与基带信号的转换。所述BBU 1002部分主要用于进行基带处理，对基站进行控制等。所述RRU 1001与BBU 1002可以是物理上设置在一起，也可以物理上分离设置的，即分布式基站。
所述BBU 1002为基站的控制中心，也可以称为处理单元，主要用于完成基带处理功能，如信道编码，复用，调制，扩频等等。例如所述BBU(处理单元)1002可以用于控制基站执行上述方法实施例中关于网络设备的操作流程。
在一个示例中，所述BBU 1002可以由一个或多个单板构成，多个单板可以共同支持单一接入指示的无线接入网(如LTE网)，也可以分别支持不同接入制式的无线接入网(如 LTE网，5G网或其他网)。所述BBU 1002还可以包括存储器10021和处理器10022，所述存储器10021用于存储必要的指令和数据。所述处理器10022用于控制基站进行必要的动作，例如用于控制基站执行上述方法实施例中发送操作。所述存储器10021和处理器10022可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路。
本申请实施例还提供另一种通信装置，请参考图11，为本申请实施例提供的另一种通信装置的结构示意图，该通信装置1100包括：收发模块1110和处理模块1120。该通信装置可用于实现上述任一方法实施例中涉及终端设备的功能。例如，该通信装置可以是终端设备，例如手持终端设备或车载终端设备；该通信装置还可以是终端设备中包括的芯片或者电路，或者包括终端设备的装置，如各种类型的车辆等。
示例性的，当该通信装置执行图4中所示的方法实施例中对应终端设备的操作或步骤时，收发模块1110用于，接收来自第一网络设备的第三指示信息，该第三指示信息用于指示终端设备在上报第二小区的测量结果时携带终端设备的位置信息，所述第二小区为第二网络设备下的小区；处理模块1120用于，生成测量报告，该测量报告中包括终端设备的位置信息；收发模块1110还用于，向第一网络设备发送测量报告。
在一种可能的设计中，收发模块1110还用于，向第一网络设备发送第一指示信息，该第一指示信息用于指示第二小区为NTN小区，或者，该第一指示信息用于指示第二小区为NTN小区且第二小区支持的PLMN为至少两个。
在一种可能的设计中，收发模块1110还用于，向第一网络设备发送第二小区的小区信息，该第二小区的小区信息中包括第二小区支持的至少两个PLMN的信息。
该通信装置中涉及的处理模块1120可以由至少一个处理器或处理器相关电路组件实现，收发模块1110可以由至少一个收发器或收发器相关电路组件或通信接口实现。该通信装置中的各个模块的操作和/或功能分别为了实现图4、图5、图6或图8中所示方法的相应流程，为了简洁，在此不再赘述。可选的，该通信装置中还可以包括存储模块，该存储模块可以用于存储数据和/或指令，收发模块1110和/或处理模块1120可以读取存取模块中的数据和/或指令，从而使得通信装置实现相应的方法。该存储模块例如可以通过至少一个存储器实现。
上述存储模块、处理模块和收发模块可以分离存在，也可以全部或者部分模块集成，例如存储模块和处理模块集成，或者处理模块和收发模块集成等。
请参考图12，为本申请实施例中提供的另一种通信装置的另一结构示意图。该通信装置具体可为一种终端设备，该通信装置可用于实现上述任一方法实施例中涉及终端设备的功能。便于理解和图示方便，在图12中，终端设备以手机作为例子。如图12所示，终端设备包括处理器，还可以包括存储器，当然，也还可以包括射频电路、天线以及输入输出装置等。处理器主要用于对通信协议以及通信数据进行处理，以及对终端设备进行控制，执行软件程序，处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是，有些种类的终端设备可以不具有输入输出装置。
当需要发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电 路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。为便于说明，图12中仅示出了一个存储器和处理器。在实际的终端设备产品中，可以存在一个或多个处理器和一个或多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以是独立于处理器设置，也可以是与处理器集成在一起，本申请实施例对此不做限制。
在本申请实施例中，可以将具有收发功能的天线和射频电路视为终端设备的收发单元，将具有处理功能的处理器视为终端设备的处理单元。如图12所示，终端设备包括收发单元1210和处理单元1220。收发单元也可以称为收发器、收发机、收发装置等。处理单元也可以称为处理器，处理单板，处理模块、处理装置等。可选的，可以将收发单元1210中用于实现接收功能的器件视为接收单元，将收发单元1210中用于实现发送功能的器件视为发送单元，即收发单元1210包括接收单元和发送单元。收发单元有时也可以称为收发机、收发器、或收发电路等。接收单元有时也可以称为接收机、接收器、或接收电路等。发送单元有时也可以称为发射机、发射器或者发射电路等。应理解，收发单元1210用于执行上述方法实施例中终端设备侧的发送操作和接收操作，处理单元1220用于执行上述方法实施例中终端设备上除了收发操作之外的其他操作。
本申请实施例还提供一种芯片系统，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得该芯片系统实现上述任一方法实施例中的对应终端设备的方法或者对应网络设备的方法。
可选地，该芯片系统中的处理器可以为一个或多个。该处理器可以通过硬件实现也可以通过软件实现。当通过硬件实现时，该处理器可以是逻辑电路、集成电路等。当通过软件实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现。
可选地，该芯片系统中的存储器也可以为一个或多个。该存储器可以与处理器集成在一起，也可以和处理器分离设置，本申请并不限定。示例性的，存储器可以是非瞬时性处理器，例如只读存储器ROM，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本申请对存储器的类型，以及存储器与处理器的设置方式不作具体限定。
示例性的，该芯片系统可以是现场可编程门阵列(field programmable gate array，FPGA)，可以是专用集成芯片(application specific integrated circuit，ASIC)，还可以是系统芯片(system on chip，SoC)，还可以是中央处理器(central processor unit，CPU)，还可以是网络处理器(network processor，NP)，还可以是数字信号处理电路(digital signal processor，DSP)，还可以是微控制器(micro controller unit，MCU)，还可以是可编程控制器(programmable logic device，PLD)或其他集成芯片。
应理解，上述方法实施例中的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
本申请实施例还提供一种计算机可读存储介质，所述计算机存储介质中存储有计算机可读指令，当计算机读取并执行所述计算机可读指令时，使得计算机执行上述任一方法实施例中的方法。
本申请实施例还提供一种计算机程序产品，当计算机读取并执行所述计算机程序产品 时，使得计算机执行上述任一方法实施例中的方法。
本申请实施例还提供一种通信系统，该通信系统包括第一网络设备、第二网络设备和至少一个终端设备，其中，第一网络设备可以是源网络设备，第二网络设备可以是目标网络设备。可选的，该通信系统中还可包括核心网设备。
应理解，本申请实施例中提及的处理器可以是中央处理单元(central processing unit，CPU)，还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中提及的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)集成在处理器中。
应注意，本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，在本申请的各种实施例中涉及的各种数字编号仅为描述方便进行的区分，上述各过程或步骤的序号的大小并不意味着执行顺序的先后，各过程或步骤的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的 部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
在本申请的各个实施例中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应所述以权利要求的保护范围为准。

Claims (19)

  1. 一种通信方法，其特征在于，所述方法包括：
    第一网络设备向第二网络设备发送第一请求消息，所述第一请求消息用于请求将终端设备接入到所述第二网络设备下的第二小区，所述第一请求消息中包括所述终端设备的位置信息和第一公共陆地移动网络PLMN的信息，所述第一PLMN为所述第一网络设备确定的所述终端设备接入的目标PLMN；
    所述第一网络设备接收来自所述第二网络设备的第一响应消息，所述第一响应消息包括第二PLMN的信息，所述第二PLMN为所述第二网络设备允许所述终端设备接入的目标PLMN；
    其中，所述终端设备所在的位置位于所述第一PLMN对应的第一区域之外，且位于所述第二PLMN对应的第二区域之内，所述第一PLMN和所述第二PLMN均为所述第二网络设备支持的PLMN。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备从所述终端设备或者所述第二网络设备接收第一指示信息，所述第一指示信息用于指示所述第二小区为NTN小区，或者，用于指示所述第二小区为NTN小区且所述第二小区支持的PLMN为至少两个。
  3. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备从所述终端设备或者所述第二网络设备接收所述第二小区的小区信息，所述第二小区的小区信息中包括所述第二小区支持的至少两个PLMN的信息，所述至少两个PLMN包括所述第一PLMN和所述第二PLMN。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，所述第一响应消息中还包括第二指示信息，所述第二指示信息用于指示所述终端设备所在的位置与请求接入的所述第一PLMN不匹配。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备向所述终端设备发送第三指示信息，所述第三指示信息用于指示所述终端设备在上报所述第二小区的测量结果时携带所述终端设备的位置信息。
  6. 根据权利要求1至5中任一项所述的方法，其特征在于，所述第一网络设备向第二网络设备发送第一请求消息，包括：
    所述第一网络设备通过核心网设备向所述第二网络设备发送所述第一请求消息；
    所述第一网络设备接收来自所述第二网络设备的第一响应消息，包括：
    所述第一网络设备从所述核心网设备接收来自所述第二网络设备的所述第一响应消息。
  7. 一种通信方法，其特征在于，所述方法包括：
    第二网络设备接收来自第一网络设备的第一请求消息，所述第一请求消息用于请求将终端设备接入到所述第二网络设备下的第二小区，所述第一请求消息中包括终端设备的位置信息和第一PLMN的信息，所述第一PLMN为所述第一网络设备确定的所述终端设备接入的目标PLMN；
    若所述终端设备所在的位置位于所述第一PLMN对应的第一区域之外，且位于第二PLMN对应的第二区域之内，则所述第二网络设备将所述第二PLMN确定为允许所述终端 设备接入的目标PLMN，所述第一PLMN和所述第二PLMN均为所述第二网络设备支持的PLMN；
    所述第二网络设备向所述第一网络设备发送第一响应消息，所述第一响应消息包括所述第二PLMN的信息。
  8. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    所述第二网络设备向所述第一网络设备发送第一指示信息，所述第一指示信息用于指示所述第二小区为NTN小区，或者，用于指示所述第二小区为NTN小区且所述第二小区支持的PLMN为至少两个。
  9. 根据权利要求7或8所述的方法，其特征在于，所述方法还包括：
    所述第二网络设备向所述第一网络设备发送所述第二小区的小区信息，所述第二小区的小区信息中包括所述第二小区支持的至少两个PLMN的信息，所述至少两个PLMN包括所述第一PLMN和所述第二PLMN。
  10. 根据权利要求7至9中任一项所述的方法，其特征在于，所述第一响应消息中还包括第二指示信息，所述第二指示信息用于指示所述终端设备所在的位置与请求接入的所述第一PLMN不匹配。
  11. 根据权利要求1至10中任一项所述的方法，其特征在于，所述第二网络设备接收来自第一网络设备的第一请求消息，包括：
    所述第二网络设备从核心网设备接收来自所述第一网络设备的所述第一请求消息；
    所述第二网络设备向所述第一网络设备发送第一响应消息，包括：
    所述第二网络设备通过所述核心网设备向所述第一网络设备发送所述第一响应消息。
  12. 一种通信方法，其特征在于，所述方法包括：
    终端设备接收来自第一网络设备的第三指示信息，所述第三指示信息用于指示所述终端设备在上报第二小区的测量结果时携带所述终端设备的位置信息，所述第二小区支持的PLMN为至少两个，所述第二小区为第二网络设备下的小区；
    所述终端设备向所述第一网络设备发送测量报告，所述测量报告中包括所述终端设备的位置信息。
  13. 根据权利要求12所述的方法，其特征在于，所述方法还包括：
    所述终端设备向所述第一网络设备发送第一指示信息，所述第一指示信息用于指示所述第二小区为NTN小区，或者，用于指示所述第二小区为NTN小区且所述第二小区支持的PLMN为至少两个。
  14. 根据权利要求12或13所述的方法，其特征在于，所述方法还包括：
    所述终端设备向所述第一网络设备发送所述第二小区的小区信息，所述第二小区的小区信息中包括所述第二小区支持的至少两个PLMN的信息。
  15. 一种通信装置，其特征在于，所述装置包括用于执行如权利要求1至6中任一项所述的方法的各步骤的单元，或者包括用于执行如权利要求7至11中任一项所述的方法的各步骤的单元，或者包括用于执行如权利要求12至14中任一项所述的方法的各步骤的单元。
  16. 一种通信装置，其特征在于，所述装置包括至少一个处理器，所述至少一个处理器与至少一个存储器耦合：
    所述至少一个处理器，用于执行所述至少一个存储器中存储的计算机程序或指令，以 使得所述装置执行如权利要求1至6中任一项所述的方法，或者使得所述装置执行如权利要求7至11中任一项所述的方法，或者使得所述装置执行如权利要求12至14中任一项所述的方法。
  17. 一种计算机可读存储介质，其特征在于，用于存储指令，当所述指令被执行时，使如权利要求1至6中任一项所述的方法被实现，或者使如权利要求7至11中任一项所述的方法被实现，或者使如权利要求12至14中任一项所述的方法被实现。
  18. 一种通信装置，其特征在于，包括处理器和接口电路；
    所述接口电路，用于交互代码指令至所述处理器；
    所述处理器用于运行所述代码指令以执行如权利要求1至6中任一项所述的方法，或者所述处理器用于运行所述代码指令以执行如权利要求7至11中任一项所述的方法，或者所述处理器用于运行所述代码指令以执行如权利要求12至14中任一项所述的方法。
  19. 一种计算机程序产品，其特征在于，当计算机读取并执行所述计算机程序产品时，使得计算机执行如权利要求1至6中任一项所述的方法，或者执行如权利要求7至11中任一项所述的方法，或者执行如权利要求12至14中任一项所述的方法。
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