WO2022027201A1 - 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
WO2022027201A1
WO2022027201A1 PCT/CN2020/106664 CN2020106664W WO2022027201A1 WO 2022027201 A1 WO2022027201 A1 WO 2022027201A1 CN 2020106664 W CN2020106664 W CN 2020106664W WO 2022027201 A1 WO2022027201 A1 WO 2022027201A1
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WO
WIPO (PCT)
Prior art keywords
information
network device
terminal device
plmn
amf
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PCT/CN2020/106664
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English (en)
French (fr)
Inventor
严乐
耿婷婷
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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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 CN202080101769.6A priority Critical patent/CN115699871A/zh
Priority to PCT/CN2020/106664 priority patent/WO2022027201A1/zh
Publication of WO2022027201A1 publication Critical patent/WO2022027201A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements

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
  • 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.
  • the satellite can indicate that it can support the services of multiple countries or operators by broadcasting information from multiple public land mobile networks (PLMN), or the satellite can broadcast Multiple access and mobility management function (AMF) information to indicate that it can support services from multiple countries or operators.
  • PLMN public land mobile networks
  • AMF Multiple access and mobility management function
  • the target cell is an NTN cell that supports multiple PLMNs or multiple AMFs
  • the communication strategies corresponding to different PLMNs or different AMFs are different
  • the prior art is used to determine the handover to the target cell only based on the cell quality cell solution, there may be a situation where the terminal device requests to access a PLMN or AMF that does not match its location.
  • the communication behavior of the terminal device cannot meet the communication policy requirements of the PLMN or AMF it requests to access, which will lead to The handover process fails, affecting communication performance.
  • the present application provides a communication method and apparatus for providing a cell handover method when the target cell is an NTN cell supporting multiple PLMNs or multiple AMFs, so that the handover process of the terminal equipment can conform to the country or country to which its location belongs.
  • the operator's communication policy requirements thereby effectively improving the handover success rate.
  • an embodiment of the present application provides a communication method, which can be executed by a target network device or by a component (for example, a chip or a circuit) configured in the target network device.
  • a component for example, a chip or a circuit
  • the method includes: the target network device receives a handover request message from the source network device, the handover request message is used to request handover of the terminal device to the target network device, the handover request message includes the location information of the terminal device, and the terminal device
  • the source network device communicates, the information of the first PLMN to which the source network device belongs or the information of the first AMF to which the source network device is connected; In an area, and the PLMN corresponding to the first area does not include the first PLMN, or the AMF corresponding to the first area does not include the first AMF, wherein the target network device manages the target cell; the target network device sends to the source network device Switchover failure message.
  • the target network device can perform admission control or handover judgment or other scenarios according to the mapping relationship between at least one area covered by its own target cell and the PLMN and/or AMF, as well as the location information of the terminal device.
  • communication policy requirements to prevent terminal devices from accessing from countries/operators that do not belong to their location.
  • the handover failure message includes one or more of the following information: failure cause information, information about the PLMN that the target network device allows the terminal device to access, and the target network device allows The information of the AMF accessed by the terminal device; wherein, the failure cause information is used to indicate that the handover failure cause is an invalid PLMN, or an invalid AMF, or invalid location information, or an illegal request.
  • the handover failure message includes location information of at least one area covered by the target cell, and information of the PLMN and/or AMF corresponding to the at least one area.
  • an embodiment of the present application provides a communication method, which can be executed by a source network device or by a component (for example, a chip or a circuit) configured in the source network device.
  • a component for example, a chip or a circuit
  • the method includes: the source network device sends a handover request message to the target network device, the handover request message is used to request handover of the terminal device to the target network device, the handover request message includes the location information of the terminal device, and the terminal device is in contact with the source network device.
  • the network device communicates, information of the first PLMN to which the source network device belongs or information of the first AMF to which the source network device is connected; the source network device receives a handover failure message from the target network device.
  • the handover failure message includes one or more of the following information: failure cause information, information about the PLMN that the target network device allows the terminal device to access, and the target network device allows Information of the AMF accessed by the terminal device; wherein the failure cause information is used to indicate that the handover failure cause is an invalid PLMN, or an invalid AMF, or invalid location information, or an illegal request.
  • the handover failure message includes location information of at least one area covered by the target cell, and information of the PLMN and/or AMF corresponding to the at least one area.
  • the method further includes: the source network device sends location measurement configuration information to the terminal device, where the location measurement configuration information instructs the terminal device to perform location measurement; the source network device obtains the location information of the terminal device .
  • an embodiment of the present application provides a communication method, which can be executed by a source network device or by a component (for example, a chip or a circuit) configured in the source network device.
  • a component for example, a chip or a circuit
  • the method includes: the source network device obtains location information of the terminal device; the source network device determines, according to the location information of the terminal device, that the terminal device is located in a first area covered by a target cell, and the first area covered by the target cell corresponds to the second PLMN or The second AMF; the source network device sends a handover request message to the target network device, where the handover request message is used to request the terminal device to be handed over to the target network device, and the handover request message includes first information indicating that access is requested
  • the PLMN is the second PLMN or the AMF requesting the connection is the second AMF; the source network device receives the handover request confirmation message from the target network device.
  • the source network device can send the information of the PLMN requesting access or the information of the AMF requesting connection to the target network device, so that The target network device can access/switch the terminal device to the PLMN or AMF corresponding to the location of the terminal device, so that the access/handover process of the terminal device conforms to the communication policy requirements of the country/operator to which its location belongs, avoiding the need for the terminal device
  • the device is accessed from a country/operator that does not belong to its location, and the success rate of handover is effectively improved.
  • the method further includes: the source network device sends a first message to the terminal device, where the first message includes first indication information, where the first indication information instructs the terminal device to report the target cell Location information of at least one area covered, and information of the PLMN and/or AMF corresponding to the at least one area; the source network device receives a second message from the terminal device, and the second message includes at least one area covered by the target cell. Location information of an area, and information of the PLMN and/or AMF corresponding to the at least one area.
  • the method further includes: the source network device receiving a third message from the target network device, where the third message includes location information of at least one area covered by the target cell, and the Information about the PLMN and/or information about the AMF corresponding to at least one area.
  • an embodiment of the present application provides a communication method, which can be executed by a terminal device, or can be executed by a component (such as a chip or circuit) configured in the terminal device.
  • the device performs this method as an example for description.
  • the method includes: a terminal device receives a first message from a network device, the first message includes first indication information, the first indication information instructs the terminal device to report location information of at least one area covered by a neighboring cell, and the at least one area Information of the PLMN and/or AMF corresponding to an area; the terminal device obtains, according to the first indication information, the location information of at least one area covered by the neighboring cell, and the information of the PLMN corresponding to the at least one area and/or AMF information; the terminal device sends a second message to the network device, where the second message includes the location information of at least one area covered by the neighboring cell, and the PLMN information and/or AMF information corresponding to the at least one area .
  • the terminal device can obtain/report the mapping relationship information between at least one area covered by the adjacent cell and the PLMN/AMF, so that the service network device of the terminal device can obtain the information of the adjacent network device when the After the above mapping relationship, a reasonable handover decision/handover request/acceptance control can be made to the terminal device according to the mapping relationship and in combination with the location information of the terminal device, so that the handover/access of the terminal device can conform to the location to which the terminal device belongs.
  • the communication policy of the country/operator requires that terminal devices be prevented from accessing from countries/operators other than their location.
  • the method further includes: the terminal device receives location measurement configuration information from the network device, where the location measurement configuration information instructs the terminal device to perform location measurement; the terminal device sends the network device the location measurement configuration information of the terminal device. location information.
  • the first message further includes second indication information, where the second indication information instructs the terminal device to report the cell global identifier CGI of the neighbor cell.
  • an embodiment of the present application provides a communication method, which can be performed by a network device or by a component (such as a chip or circuit) configured in the network device.
  • the device performs this method as an example for description.
  • the method includes: the network device sends a first message to the terminal device, where the first message includes first indication information, the first indication information instructs the terminal device to report location information of at least one area covered by a neighboring cell, and the at least one The information of the PLMN and/or the AMF corresponding to the area; the network device receives a second message from the terminal device, and the second message includes the location information of at least one area covered by the neighboring cell, and the at least one area corresponds to PLMN information and/or AMF information.
  • the method further includes: the network device sends location measurement configuration information to the terminal device, where the location measurement configuration information instructs the terminal device to perform location measurement; the network device receives the location information sent by the terminal device.
  • the first message further includes second indication information, where the second indication information instructs the terminal device to report the cell global identifier CGI of the neighbor cell.
  • an embodiment of the present application provides a communication method.
  • the method may be executed by a first network device, or may be executed by a component (for example, a chip or a circuit) configured in the first network device, which is described in the following description of the present application. , which will be described by taking the first network device executing the method as an example.
  • the method includes: a first network device generating a third message, where the third message includes location information of at least one area covered by a first cell managed by the first network device, and a corresponding location information of at least one area covered by the first cell PLMN information and/or AMF information; the first network device sends the third message to the second network device.
  • the method further includes: the first network device receives a fourth message from the second network device, where the fourth message includes at least the coverage of the second cell managed by the second network device Location information of an area, and PLMN information and/or AMF information corresponding to at least one area covered by the second cell.
  • the mapping relationship between at least one area covered by each cell and the PLMN/AMF can be exchanged between network devices, so that the first network device or the second network device can obtain the mapping relationship of the other party after obtaining the mapping relationship.
  • a reasonable decision can be made when subsequent access control or handover judgment is required, or in other scenarios, so that the access/handover of the terminal device can conform to the country/operation where its location belongs.
  • the terminal device should not be accessed from a country/operator that does not belong to its location.
  • an embodiment of the present application provides a communication device, the device has the function of implementing the first aspect or the target network device in any possible design of the first aspect, or has the function of implementing the second aspect or the second aspect.
  • the function of the source network device in any possible design of the aspect, or the function of the source network device in any possible design of the third aspect or the third aspect, or the fifth aspect or the fifth aspect.
  • the function of the network device in any possible design of the aspect, or the function of the first network device in any possible design of the sixth aspect or the sixth aspect.
  • the apparatus may be a network device, or may be a chip or circuit included in the network device.
  • the communication apparatus may also have the function of implementing the terminal device in any possible design of the fourth aspect or the fourth aspect.
  • the apparatus may be a terminal device, or may be a chip or circuit 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 any design of the first aspect corresponding to the target network device. function, or perform the corresponding function of the source network device in the above-mentioned second aspect or any design of the second aspect, or perform the corresponding function of the source network device in the above-mentioned third aspect or any possible design of the third aspect, Or perform the corresponding function of the terminal device in the fourth aspect or any possible design of the fourth aspect, or perform the corresponding function of the network device in the fifth aspect or any possible design of the fifth aspect, or perform Corresponding functions of the first network device in any possible design of the sixth aspect or the sixth aspect.
  • the transceiver module is used to support the communication between the device and other communication devices. For example, when the device is a target network device, it can receive a handover request message from the source 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 communication 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 third aspect, or the implementation of the fourth aspect or the fourth aspect method, or execute the method in the fifth aspect or any possible design of the fifth aspect, or execute the method in the sixth aspect or any possible design of the sixth aspect.
  • 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 a chip included in the terminal device, the communication interface can be the input of the chip /Output Interface.
  • 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.
  • a method in any of the three aspects or any possible design of the third aspect, or a method in any possible design of the above-mentioned fourth aspect or the fourth aspect, or in any possible design of the above-mentioned fifth aspect or the fifth aspect A method in a possible design, or a method in implementing the sixth aspect or any one of the possible designs of the sixth 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.
  • a method in a possible design, or a method in any possible design of performing the above-mentioned second aspect or the second aspect, or a method in any possible design of performing the above-mentioned third aspect or the third aspect Or implement the method in any possible design of the fourth aspect or the fourth aspect above, or implement the method in any possible design of the fifth aspect or the fifth aspect above, or implement the sixth aspect or the above-mentioned aspect.
  • an embodiment of the present application provides a computer program product, which, 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 implement the method in any possible design of the second aspect or the second aspect above, or implement the method in any possible design of the third aspect or the third aspect above, or implement the fourth aspect or the above.
  • an embodiment of the present application provides a communication system, where the communication system includes a network device and at least one terminal device.
  • the network devices in the communication system may include a source network device and a target network device.
  • the network device may include a first network device and/or a second 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 logical cells 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 a network device configuring location measurement for a terminal device in an embodiment of the present application
  • FIG. 5 is a schematic diagram of a specific example of a communication method provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of another specific example of a communication method provided by an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 9 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 11 is another schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of another communication apparatus provided by an embodiment of the present application.
  • FIG. 13 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.
  • a satellite can indicate that it can support services of multiple countries/operators by broadcasting multiple PLMN information (such as PLMN identification information, etc.) or AMF information (such as AMF identification information, etc.)
  • PLMN information such as PLMN identification information, etc.
  • AMF information such as AMF identification information, etc.
  • 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/AMF1 and the information of PLMN2/AMF2.
  • 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.
  • satellite cells can be divided into finer granularity, for example, the entire service coverage area of a satellite cell can be 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 the service areas of different operators.
  • different areas under the same satellite cell can correspond to different PLMNs/AMFs, so that multiple logical cells are formed under the same satellite cell, and then the mobility of terminal equipment can be adjusted according to different areas. Effective management.
  • the embodiments of the present application can also be applied to the scenario of cell handover.
  • the terminal device may be handed over from the source network device to the target network device due to the movement of the location, the change of the service, the change of the network coverage 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. 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 source network device sends a handover request message to the target network device, where the handover request message is used to request to handover the terminal device to the target network device.
  • the target network device may receive the handover request message from the source network device.
  • the handover request message includes location information of the terminal device, and information of the first PLMN to which the source network device belongs or information of the first AMF to which the source network device is connected when the terminal device communicates with the source network device.
  • the PLMN information may include PLMN identification information, for example, PLMN-identifier.
  • the information of the AMF may include identification information of the AMF, for example, AMF-identifier.
  • the target cell can support/correspond to multiple PLMNs and/or multiple AMFs, but the source network device does not know the relationship between at least one area covered by the target cell and the PLMNs and/or AMFs supported/corresponding to the target cell
  • the terminal device accesses the source cell through PLMN1 or AMF1
  • the source terminal device requests to handover the terminal device to the target cell, it usually also requests to access the target cell through PLMN1 or AMF1.
  • the information of the first PLMN included in the handover request message can also be understood that the terminal device requests to access the target cell through the first PLMN, or the terminal device considers that the target cell requested for access belongs to the first PLMN.
  • the information of the first AMF included in the handover request message can also be understood as that the terminal device requests to access the target cell through the first AMF, or the terminal device considers that the target cell requested to be accessed is the cell managed by the first AMF, or , the terminal device considers that the AMF connected to the target network device requesting access is the first AMF.
  • the location information of the terminal device in the handover request message may include one or more of longitude information, latitude information, and altitude information, or may 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 source network device from the terminal device, for example, the source network device may receive a measurement report reported by the terminal device, and the measurement report may include the location of itself measured by the terminal device. information.
  • the location information of the terminal device may be received by the source network device from other network devices, for example, the source 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 source network device.
  • the source 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 source network device in other ways, which is not limited in this application.
  • the source network device may configure the terminal device to perform location measurement. Specifically, as shown in steps S304 to S305 in FIG. 4 , the source network device may send location measurement configuration information to the terminal device, where the location measurement configuration information is used to instruct the terminal device to perform location measurement. Further, the terminal device may perform location measurement according to the location measurement configuration information, and send the measured location information of itself to the source network device through a measurement report.
  • Step S302 the target network device determines that the location of the terminal device is located in the first area covered by the target cell according to the location information of the terminal device, and the PLMN corresponding to the first area does not include the first PLMN, or the first area corresponds to The AMF does not include the first AMF.
  • Step S303 The target network device sends a handover failure message to the source network device, where the handover failure message is used to refuse to handover the terminal device to the target network device.
  • the source network device may receive the handover failure message from the target network device.
  • the target network device may obtain information based on the location information of the terminal device, the location information of at least one area covered by the target cell, and the PLMN information and/or AMF information corresponding to the at least one area. Determine whether the terminal device is allowed to access the target network device.
  • the location information of at least one area covered by the target cell and the information of the PLMN and/or AMF corresponding to the at least one area can be understood as the at least one area covered by the target cell and the PLMN and/or Mapping relationship between AMFs.
  • the PLMN information and/or AMF information corresponding to the at least one area may be the PLMN information and/or AMF information corresponding to each area in the at least one area, or the at least one area
  • the information of the PLMN and/or the information of the AMF corresponding to some areas in the area is not limited in this application.
  • the information of the PLMN and/or the information of the AMF corresponding to different areas may be the same or different, which is also not limited in this application.
  • the target network device may refuse the terminal device to switch to the target network device. Further, the target network device may send a handover failure message to the source network device.
  • the handover failure message may also be called a handover preparation failure message, or has other names, which are not limited in this application.
  • the handover failure message may include one or more of the following information:
  • Failure reason information or handover failure reason value which is used to indicate that the handover failure reason is invalid or wrong PLMN, or invalid or wrong AMF, or invalid location information, or illegal request, or does not support the requested PLMN, or does not Support for requested AMF etc.
  • the invalid or wrong PLMN means that the target network device does not belong to the PLMN requested in the handover request message;
  • the invalid or wrong AMF means that the AMF requested in the handover request message is not responsible for managing the target network device;
  • the illegal request means the target network device The network device does not support the handover request of the terminal device, or the target network device does not support the PLMN or AMF requested in the handover request message.
  • the information of the PLMNs that the target network device allows the terminal device to access may include: information of the PLMNs corresponding to the target cell that the terminal device is allowed to access, and/or the corresponding allowable terminals of other non-target cells belonging to the target network device Information about the PLMN that the device accesses.
  • the information of the AMF that the target network device allows the terminal device to access may include: the information of the AMF corresponding to the target cell that allows the terminal device to access, and/or the allowable terminal device corresponding to other non-target cells belonging to the target network device Information about the access AMF.
  • the handover failure message may further include: location information of at least one area covered by the target cell, and PLMN information and/or AMF information corresponding to the at least one area. That is, the handover failure message indicates the mapping relationship between at least one area covered by the latest or available target cell and the PLMN and/or AMF.
  • the handover failure message may also include: location information of at least one area covered by other non-target cells belonging to the target network device, and a PLMN corresponding to at least one area covered by the other non-target cells. information and/or AMF information. That is, the handover failure message also indicates the mapping relationship between at least one area covered by other non-target cells belonging to the target network device and the PLMN and/or AMF.
  • the handover failure message may indicate that the area covered by the cells corresponding to all or part of the cells of the other non-target cells and the PLMN and/or AMF The mapping relationship between them is not limited in this application.
  • the source network device can determine the correct PLMN or AMF information when the terminal device at the current location accesses the target network device/target cell according to the information contained in the handover failure message , and then send a handover request message again, requesting that the terminal device be handed over to a logical cell that matches its location in the target cell.
  • the target The network device may determine that the terminal device is allowed to be handed over to the target cell or a cell belonging to the target network device corresponding to the first PLMN/first AMF, and send a handover request confirmation message to the source network device, the handover request confirmation message indicating that the terminal device is allowed to be handed over. to the target network device. Furthermore, the source network device may send a handover message to the terminal device, instructing the terminal device to switch to the target cell.
  • UE1 supports both PLMN1 and PLMN2, and UE2 supports both PLMN1 and PLMN2.
  • the positions of UE1 and UE2 are shown in Figure 2, that is, UE1 and UE2 are both located in the coverage area of the target cell, but UE1 is located in the area corresponding to PLMN1/AMF1 in the target cell, and UE2 is located in the target cell corresponding to PLMN2/AMF2 within the area.
  • the target base station can determine to allow UE1 to switch to the target cell belonging to PLMN1 or the logical cell corresponding to PLMN1, or, in other words, The target base station may determine to allow the UE1 to switch to the target cell under the management of the AMF1 or the logical cell corresponding to the AMF1. Subsequently, for UE1, the target base station may send a handover request confirmation message to the source base station.
  • the source base station may send a handover message to UE1, instructing UE1 to perform handover to the target cell.
  • the handover message may also be called a reconfiguration message, or may have other names, which are not limited in this application.
  • the target base station may determine that it cannot support UE2 to switch to the target cell belonging to PLMN1 or the logical cell corresponding to PLMN1, or, The target base station may determine that it cannot support the handover of UE2 to the target cell belonging to AMF1 or the logical cell corresponding to AMF1, that is, the target base station needs to reject the handover request of UE2. Subsequently, for UE2, the target base station may send a handover failure message to the source base station.
  • the source base station can send a handover request message to the target base station again according to the indication information included in the handover failure message that the PLMN that allows UE2 to access is PLMN2 or the AMF that allows UE2 to access is AMF2 , requesting that UE2 be handed over to the target cell belonging to PLMN2 or the target cell managed by AMF2.
  • the target network device can, according to the mapping relationship between at least one area covered by its own target cell and the PLMN and/or AMF, make an admission control or handover decision or other scenarios when it needs to be performed.
  • Reasonable decision to allow the terminal equipment to access/handover to the PLMN/AMF corresponding to its location, so that the access/handover process of the terminal equipment conforms to the communication policy requirements of the country/operator to which its location belongs, and avoids the terminal equipment from The country/operator access to which its location belongs.
  • the target network device may also exchange the mapping relationship between at least one area covered by the target cell and the PLMN and/or AMF with the source network device.
  • the source network device may make a reasonable judgment based on the mapping relationship and the location of the terminal device, and request the terminal device to be handed over to the logical cell corresponding to its location, thereby effectively improving the handover success rate.
  • 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 source network device and the target network device, and the source network device and the target 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 the present invention.
  • the core network device may, for example, refer to an AMF
  • 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.
  • the solution shown in FIG. 6 is also applicable to the situation where the interface between the access network device and the core network device is the S1 interface, which is not limited in the present invention.
  • the UE may send a measurement report to the source base station.
  • the measurement report includes the location information of the UE.
  • the source base station may send a handover request message to the target base station, where the handover request message includes the location information of the UE and the information of the PLMN1 and/or the AMF1 that the UE requests to access.
  • the location information of the UE included in the 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, such as locating the position of the UE, Or obtained from other network devices, which is not limited.
  • the PLMN1 that the UE requests to access may be the PLMN that the UE accesses in the source cell or the PLMN to which the source cell belongs.
  • the AMF1 that the UE requests to access may be the AMF that the source base station is connected to in the source cell or the management source cell AMF.
  • the target base station may determine whether to allow the UE to switch to the target cell according to the location information of the UE and the mapping relationship between at least one area covered by the target cell and the PLMN and/or AMF. Specifically, if the UE is located in a certain area covered by the target cell, but the area corresponds to PLMN2 and/or AMF2, the target base station can determine that the handover fails and needs to reject the handover request of the UE, that is, reject the UE Handover to the target cell below it belonging to PLMN1 or reject the UE to handover to the target cell managed by AMF1 below it.
  • the target base station may send a handover failure message to the source base station in step S504, and the handover failure message carries the handover failure cause value, and is used to indicate at least one area covered by the latest or available target cell and the PLMN and/or Information about the mapping relationship between AMFs.
  • the source base station can subsequently determine the PLMN to which the target cell the UE needs to handover to belongs to, or manage the AMF of the target cell to which the UE needs to handover, according to the mapping relationship of the target cell and the location information of the UE.
  • the source base station may re-initiate a handover request to switch the UE to a target cell matching its location/a PLMN to which the target cell belongs/an AMF that manages the target cell, so that the UE can successfully access the target cell.
  • the source base station can determine the PLMN and/or AMF that matches the location of the UE according to the mapping relationship and the location information of the UE, and then directly initiate the handover of the UE to match its location.
  • the handover request of the target cell/target AMF can effectively improve the handover success rate.
  • the UE may send a measurement report to the source base station, optionally, the measurement report includes the location information of the UE.
  • the source base station may send a first handover request message to AMF1, where the first handover request message may include the location information of the UE and the information of the PLMN1 and/or the AMF1 that the UE requests to access.
  • the first handover request message may be a HO required message or other, which is 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.
  • the PLMN1 that the UE requests to access may be the PLMN that the UE accesses in the source cell or the PLMN to which the source cell belongs.
  • the AMF1 that the UE requests to access may be the AMF connected to the source base station or the AMF that manages the source cell.
  • the AMF1 may send a second handover request message to the target base station, where the second handover request message may include the location information of the UE and the information of the PLMN1 and/or the AMF1 that the UE requests to access.
  • 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 target base station may determine whether to allow the UE to switch to the target cell according to the location information of the UE and the mapping relationship between at least one area covered by the target cell and the PLMN and/or AMF. Specifically, if the UE is located in a certain area covered by the target cell, but the area corresponds to PLMN2 and/or AMF2, the target base station can determine that the handover fails and needs to reject the handover request of the UE, that is, reject the UE Handover to the lower cell belonging to PLMN1 (such as the above target cell) or reject the UE to handover to the lower cell managed by AMF1 (such as the above target cell).
  • PLMN1 such as the above target cell
  • AMF1 such as the above target cell
  • the target base station can send a first handover failure message to AMF1 in step S605, and the first handover failure message carries the handover failure cause value, and is used to indicate at least one area covered by the latest or available target cell and the PLMN and/or information about the mapping relationship between AMFs, the handover failure cause value may be, for example, an invalid or wrong PLMN, or an invalid or wrong AMF.
  • the first handover failure message may be a handover failure message or other messages, which are not limited.
  • the AMF1 may send a second handover failure message to the source base station, where the second handover failure message carries the handover failure cause value, and is used to indicate at least one area and at least one area covered by the latest or available target cell.
  • the information of the mapping relationship between the PLMN and/or the AMF, and the handover failure cause value may be, for example, an invalid or wrong PLMN, or an invalid or wrong AMF.
  • the second handover failure message may be a handover preparation failure message or other messages, which are not limited.
  • the source base station may receive the second handover failure message.
  • the source base station can subsequently determine the PLMN to which the target cell that the UE needs to switch to belongs to, or manage the AMF of the target cell to which the UE needs to be handed over, according to the mapping relationship of the target cell and the location information of the UE, and further, Optionally, the source base station may initiate a handover request for handover of the UE to a target cell matching its location/PLMN to which the target cell belongs/AMF managing the target cell, so that the UE can be successfully handed over to the target cell.
  • the source base station can determine the PLMN and/or AMF that matches the location of the UE according to the mapping relationship of the target cell and the location information of the UE, and then initiates the handover of the UE to the location of the UE. Match the handover request of the target cell/target AMF, thereby effectively improving the handover success rate.
  • the specific example shown in FIG. 6 is described by taking the example that the source base station and the target base station belong to the same AMF, that is, the AMF1 shown in the figure. It can be understood that the source base station and the target base station may also belong to different AMFs.
  • the handover process may also include the handover process between AMFs, and the messages used for handover exchanged between AMFs also include the location information of the UE, the reason for the failure of the handover, One or more items of information for the mapping relationship between at least one area covered by the target base station and the PLMN and/or AMF, etc., will not be repeated here.
  • FIG. 7 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • the method includes:
  • Step S701 the source network device acquires the location information of the terminal device.
  • 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 source network device may obtain the location information of the terminal device from the terminal device. For example, the source network device may receive a measurement report reported by the terminal device, where the measurement report includes its own location information measured by the terminal device. Alternatively, the source network device may also obtain the location information of the terminal device from other network devices, for example, obtain the location information of the terminal device from the core network device. Alternatively, the source network device can also determine the location information of the terminal device by itself. For example, the source network device can perform location positioning on the terminal device, and then obtain the location information of the terminal device. The source network device may also acquire the location information of the terminal device in other ways, which is not limited in this application.
  • the source network device may also configure the terminal device to perform location measurement. Specifically, the source network device may send location measurement configuration information to the terminal device, where the location measurement configuration information is used to instruct the terminal device to perform location measurement. Further, the terminal device may send the measured location information to the source network device through a measurement report.
  • Step S702 The source network device determines, according to the location information of the terminal device, that the terminal device is located in the first area covered by the target cell, and the first area covered by the target cell corresponds to the second PLMN or the second AMF.
  • Step S703 The source network device sends a handover request message to the target network device, where the handover request message is used to request that the terminal device be handed over to the target network device, and the handover request message may include first information indicating that access is requested
  • the PLMN is the second PLMN or the AMF requesting the connection is the second AMF. That is, the first information may be information of the second PLMN and/or information of the second AMF.
  • the first information may include information of the second PLMN, indicating that access to a cell corresponding to the second PLMN or a request to access a cell belonging to the second PLMN is requested.
  • the target cell or the target cell for which access is requested belongs to the second PLMN, where the information of the PLMN may include identification information of the PLMN, such as PLMN-identifier.
  • the first information indicates that the AMF requesting connection is the second AMF
  • the first information may include information of the second AMF, indicating that the request to access the cell corresponding to the second AMF or the request to access the second AMF is requested.
  • the target cell managed by the AMF or the target cell requesting access is managed by the second AMF, wherein the information of the AMF may include identification information of the AMF, such as AMF-identifier.
  • the source network device may determine the current state of the terminal device according to the location information of the terminal device, the location information of at least one area covered by the target cell, and the PLMN information and/or AMF information corresponding to the at least one area.
  • the location is located in the first area covered by the target cell, and the first area corresponds to the second PLMN or the second AMF.
  • a handover request message may be sent to the target network device to request handover of the terminal device to a cell belonging to the second PLMN or a cell managed by the second AMF.
  • the location information of at least one area covered by the target cell and the PLMN information and/or AMF information corresponding to the at least one area can be understood as indicating that the at least one area covered by the target cell is related to the PLMN and/or mapping between AMFs.
  • the source network device may receive information from the terminal device for indicating the mapping relationship between at least one area covered by the target cell and the PLMN and/or AMF.
  • the source network device may receive information from the terminal device for indicating the mapping relationship between at least one area covered by the target cell and the PLMN and/or AMF.
  • the source network device may receive information from the target network device for indicating the mapping relationship between at least one area covered by the target cell and the PLMN and/or AMF.
  • the information indicating the above-mentioned mapping relationship received from the target network device may refer to the handover failure message or the handover preparation failure message in the handover process performed between the source network device and the target network device before.
  • steps S901 to S903 For a detailed introduction of the process, reference may be made to the related descriptions in steps S901 to S903 below.
  • Step S704 the target network device sends a handover request confirmation message to the source network device.
  • the source network device may receive a handover request confirmation message from the target network device.
  • the source network device can make a reasonable decision when a handover decision or other scenarios need to be made according to the mapping relationship between at least one area covered by the target cell and the PLMN and/or AMF.
  • the terminal equipment accesses/handovers to the appropriate target cell/PLMN/AMF corresponding to its location, so that the access/handover process of the terminal equipment conforms to the communication policy requirements of the country/operator to which its location belongs, and prevents the terminal equipment from The country/operator to which its location belongs can be accessed, and the success rate of handover can be effectively improved.
  • the handover process described in the above steps S701 to S704 may be based on the directly connected interface (such as the Xn or X2 interface) between the access network devices.
  • the implementation may also be implemented based on the interface between the access network device and the core network device (eg, NG or S1 interface), and this application will not give examples one by one here.
  • FIG. 8 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • the method includes:
  • Step S801 the network device sends a first message to the terminal device, where the first message includes first indication information, the first indication information instructs the terminal device to acquire and/or report the location information of at least one area covered by a neighboring cell, and The information of the PLMN and/or the information of the AMF corresponding to the at least one area.
  • the terminal device may receive the above-mentioned first message from the network device.
  • the location information of at least one area covered by the adjacent cell, and the PLMN information and/or AMF information corresponding to the at least one area can be understood as indicating that the at least one area covered by the adjacent cell is the same as the Information about the mapping relationship between PLMN and/or AMF.
  • the first indication information can also be understood as information instructing the terminal device to acquire and/or report the mapping relationship between each area covered by the neighboring cell and the PLMN and/or AMF.
  • the mapping relationship between at least one area covered by the adjacent cell and the PLMN and/or AMF may be one-to-one, one-to-many, or many-to-one. The application is not limited.
  • the location information of each area in the at least one area covered by the neighboring cell is used to describe the geographic range included in the area.
  • the location information of an area may include at least one longitude information, at least one latitude information, at least one altitude information (such as altitude information or altitude information relative to the ground plane or others) of the area.
  • the location information of an area can also be represented by an identifier (such as ID or index), where the identifier of the area is related to the specific location of the area (that is, the specific geographic range included in the area).
  • association or mapping relationship there is an association or mapping relationship between them, and the association or mapping relationship may be predefined by the system, or may be sent by the network device to the terminal device through a system message, an RRC message, or a layer 2 message, which is not limited in this application. That is to say, both the network device and the terminal device can determine their corresponding area information/location information according to the identifier (eg, ID or index).
  • identifier eg, ID or index
  • the neighboring cell may be a neighboring cell of a cell currently accessed by the terminal device, or a neighboring cell of a serving cell of the terminal device.
  • the cell currently accessed by the terminal device or the serving cell of the terminal device is a cell under the jurisdiction of the network device, that is, the cell currently accessed by the terminal device belongs to the network device, or the serving cell of the terminal device belongs to the network device. It should be noted that the cell currently accessed by the terminal device and the serving cell of the terminal device may be the same concept. In the following description, the expression of the cell currently accessed by the terminal device will be uniformly used to describe the technical solutions of the present application in detail. .
  • the PLMN information may be PLMN identification information, such as PLMN-identifier.
  • the information of the AMF may be the identification information of the AMF, that is, AMF-identifier.
  • the first indication information in this embodiment of the present application may be at the cell level (per cell), that is, the first indication information is specific to a certain cell of the cell currently accessed by the terminal device.
  • the first indication information is specific to a certain cell of the cell currently accessed by the terminal device.
  • a neighboring cell it is used to instruct the terminal device to acquire and/or report the mapping relationship information between at least one area covered by the neighboring cell and the PLMN and/or AMF.
  • the cell currently accessed by the terminal device or the serving cell of the terminal device may have one or more neighboring cells, and different neighboring cells may correspond to different first indication information.
  • the first indication information may be at the terminal equipment level (per UE), that is, the first indication information is for all neighboring cells that can be detected by the terminal equipment, and is used to indicate the terminal equipment Acquire and/or report the mapping relationship information between at least one area covered by each of the neighboring cells that can be detected by the terminal device and the PLMN and/or AMF.
  • the neighboring cells that can be detected by the terminal device include one or more cells, and each of the cells corresponds to the first indication information.
  • the present application specifically takes one of the one or more adjacent cells as an example to describe the technical solution of the present application in detail.
  • the first message may be an RRC message or a layer 2 message or other messages, which is not limited in this application.
  • the first indication information may be indication information represented by a binary value or a Boolean value, or may be a certain information element carried in the first message, or may have other expressions, which are not limited in this application.
  • the first indication information may be a flag bit occupying 1 bit in the first message.
  • the flag bit When the value of the flag bit is "1", it indicates that the terminal The device needs to obtain and/or report the mapping relationship information between at least one area included in the adjacent cell and the PLMN and/or AMF.
  • the value of this flag When the value of this flag is "0", it means that the terminal device does not need to obtain and/or report Information about the mapping relationship between at least one area included in the adjacent cell and the PLMN and/or AMF.
  • the first indication information may be a Boolean type flag bit in the first message.
  • the value of the flag bit is "TRUE”
  • the value of the flag bit is "FALSE”
  • the first indication information is a certain information element carried in the first message
  • the first indication information may be the "AcquireMapping" information element contained in the first message, that is, when the first message contains the "AcquireMapping" information element
  • the terminal does not need to acquire and/or report the mapping relationship information between at least one area included in the neighbor cell and the PLMN and/or AMF.
  • the network device may also send location measurement configuration information to the terminal device, where the location measurement configuration information instructs the terminal device to perform location measurement.
  • the terminal device can measure its own location according to the location measurement configuration information, and report the measured location information to the network device.
  • the position information obtained by the terminal device is the position measurement result obtained by the terminal device performing the position measurement on its own position
  • the position information may include one or more of longitude information, latitude information and altitude information
  • the location information may include an identification (eg, ID or index).
  • 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.
  • the area range can be expressed by parameters such as multiple longitude values, multiple latitude values, and multiple height values.
  • 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 network device may also send measurement configuration information to the terminal device, where the signal measurement configuration information instructs the terminal device to measure the signal quality of the neighboring cell.
  • the measurement configuration information may include frequency information, which is used to indicate the object or frequency point that the terminal device needs to measure.
  • the frequency information may include a synchronization signal block (SSB) and/or an absolute frequency position of a reference resource block, and the like.
  • SSB synchronization signal block
  • the terminal device can perform signal quality measurement according to the measurement configuration information, and after detecting a new cell (such as a neighboring cell of the serving cell), then the physical cell identifier (PCI) of the cell, the signal The quality, etc. are reported to the network device. Subsequently, if the network device determines that the cell detected by the terminal device is a new neighbor cell, the network device may send the first message for indicating the cell global identifier (CGI) of the cell to be reported through the above-mentioned first message. 2. Instruction information.
  • the second indication information may include a PCI value.
  • the second indication information is used to instruct the terminal device to report the CGI of the cell whose cell identifier is the PCI value.
  • the second indication information may include frequency information. Yes, the second indication information is used to instruct the terminal device to report the CGI of the cell corresponding to the frequency information.
  • the second indication information may also be called measurement task information, or CGI measurement indication, or have other names, which are not limited in this application.
  • the network device may send location measurement configuration information and/or measurement configuration information for performing signal quality measurement to the terminal device.
  • the location measurement configuration information and the measurement configuration information for signal quality measurement may be sent in the same message , may also be sent in different messages, for example, may be sent in different RRC messages, which is not limited in this application.
  • Step S802 The terminal device obtains, according to the first indication information, the location information of at least one area covered by the neighboring cell, and the information of the PLMN and/or the AMF corresponding to the at least one area.
  • the terminal device can read the system message of the adjacent cell according to the indication of the first indication information, and obtain the location information of at least one area included in the adjacent cell from the system message of the adjacent cell, and the at least one area Corresponding PLMN information and/or AMF information.
  • Step S803 The terminal device sends a second message to the network device, where the second message includes location information of at least one area covered by the neighboring cell, and information of the PLMN and/or AMF corresponding to the at least one area.
  • the second message may include information for indicating the mapping relationship between at least one area covered by the neighboring cell and the PLMN and/or AMF.
  • the PLMN information and/or AMF information corresponding to the at least one area may be the PLMN information and/or AMF information corresponding to all areas covered by the adjacent area, or the adjacent area.
  • the information of the PLMN and/or the information of the AMF corresponding to the partial area covered by the area is not limited in this application.
  • the cell currently accessed by the terminal device has a neighboring cell, and the neighboring cell covers country A and country B.
  • the area belonging to country A in the neighboring area is denoted as area 1
  • the area belonging to country B is denoted as area 2
  • country A corresponds to PLMN1/AMF1
  • country B corresponds to PLMN2/AMF2.
  • the information broadcast in the system message of the neighboring cell may include one or more of the following: location information of area 1, identification information of PLMN1 and/or AMF1, location information of area 2, identification information of PLMN2 and/or AMF2 .
  • the information obtained by the terminal device from the system message of the adjacent cell and used to indicate the mapping relationship between at least one area covered by the adjacent cell and the PLMN and/or AMF can be expressed as, ⁇ Location information of area 1, Identification information of PLMN1 and/or AMF1 ⁇ , ⁇ location information of area 2, identification information of PLMN2 and/or AMF2 ⁇ . Further, the terminal device may report the information to the network device through the second message.
  • the second message may be an RRC message or a layer 2 message or other messages, which is not limited in this application.
  • the second message may further include the CGI of the neighboring cell measured by the terminal device.
  • the terminal device can acquire/report the mapping relationship information between at least one area covered by the neighbor cell and the PLMN/AMF, for example, in the automatic neighbor relationship (automatic neighbor relation, ANR) process
  • ANR automatic neighbor relation
  • FIG. 9 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • the method includes:
  • Step S901 the first network device generates a third message, the third message includes the location information of at least one area covered by the first cell managed by the first network device, and the information of the PLMN and/or AMF corresponding to the at least one area Information.
  • Step S902 the first network device sends a third message to the second network device. Accordingly, the second network device may receive the third message from the first network device.
  • Step S903 the second network device generates a fourth message, the fourth message includes the location information of at least one area covered by the second cell managed by the second network device, and the information of the PLMN corresponding to the at least one area and/or Information on AMF.
  • Step S904 the second network device sends a fourth message to the first network device.
  • the first network device may receive the fourth message from the second network device.
  • the present application does not specifically limit the execution sequence between the above steps S902 and S904. That is to say, the first network device may first send the third message to the second network device, and after receiving the third message, the second network device sends the fourth message to the first network device as a response to the third message . Alternatively, the second network device may first send the fourth message to the first network device, and after receiving the fourth message, the first network device sends the third message to the second network device as a response to the fourth message.
  • the PLMN information may include PLMN identification information, for example, PLMN-identifier.
  • the AMF information may include AMF identification information, for example, AMF-identifier.
  • the above-mentioned third message and fourth message may be an XN SETUP REQUEST message or an XN SETUP RESPONSE message, or other messages.
  • the above-mentioned third message and fourth message may be an X2 SETUP REQUEST message or an X2 SETUP RESPONSE message, or other messages.
  • the first network device and the second network device may be two adjacent access network devices, such as base stations, or may be CUs in two adjacent access network devices .
  • a directly connected interface eg X2/Xn interface
  • they can exchange information on the mapping relationship between each area covered by the cell they manage and the PLMN/AMF through the interface.
  • the XN SETUP REQUEST message and the XN SETUP RESPONSE message may contain information about the mapping relationship between each area covered by the cell and the PLMN/AMF.
  • the mapping relationship between each area covered by the cell and the PLMN/AMF reference may be made to the above description, and details are not repeated here.
  • cell C belongs to gNB1, and cell C covers country A and country B. It is assumed that the area belonging to country A in cell C is recorded as area 1, and the area belonging to country B in cell C is recorded as area 2, and it is assumed that country A corresponds to PLMN1/AMF1, country B corresponds to PLMN2/AMF2.
  • Cell D belongs to gNB2, and cell D covers country B and country C. It is assumed that the area belonging to country B in cell D is recorded as area 3, and the area belonging to country C in cell D is recorded as area 4, and it is assumed that country B corresponds to PLMN2/ AMF2, country C corresponds to PLMN3/AMF3.
  • the XN SETUP REQUEST message sent by gNB1 (or gNB1-CU) to gNB2 (or gNB2-CU) may contain information about the mapping relationship between each area covered by cell C and the PLMN/AMF, For example, ⁇ location information of area 1, identification information of PLMN1 and/or AMF1 ⁇ , ⁇ location information of area 2, identification information of PLMN2 and/or AMF2 ⁇ .
  • the XN SETUP RESPONSE message sent by gNB2 (or gNB2-CU) to gNB1 (or gNB1-CU) may contain information on the mapping relationship between each area covered by cell D and the PLMN/AMF, such as ⁇ area 3 Location information, identification information of PLMN2 and/or AMF2 ⁇ , ⁇ location information of area 4, identification information of PLMN3 and/or AMF3 ⁇ .
  • the XN SETUP REQUEST message sent by gNB2 (or gNB2-CU) to gNB1 (or gNB1-CU) may contain information about the mapping relationship between each area covered by cell D and the PLMN/AMF, such as ⁇ the location of area 3 information, identification information of PLMN2 and/or AMF2 ⁇ , ⁇ location information of area 4, identification information of PLMN3 and/or AMF3 ⁇ .
  • the XN SETUP RESPONSE message sent by gNB1 (or gNB1-CU) to gNB2 (or gNB2-CU) may contain information about the mapping relationship between each area covered by cell C and PLMN/AMF, such as ⁇ area 1 Location information, identification information of PLMN1 and/or AMF1 ⁇ , ⁇ location information of area 2, identification information of PLMN2 and/or AMF2 ⁇ .
  • the first network device and the second network device may also be CU nodes inside the same access network device and DU nodes. That is, the CU node of a certain access network device may send information about the mapping relationship between at least one area covered by the cell of the access network device and the PLMN/AMF to the DU node of the access network device, and/or , the DU node of the access network device may also send to the CU node of the access network device information about the mapping relationship between at least one area covered by the cell of the access network device and the PLMN/AMF.
  • the F1 SETUP REQUEST message sent by gNB-DU to gNB-CU the F1 SETUP RESPONSE message sent by gNB-CU to gNB-DU, the F1 SETUP FAILURE message sent by gNB-CU to gNB-DU, and the F1 SETUP FAILURE message sent by gNB-CU to gNB- UE CONTEXT SETUP REQUEST message sent by DU, UE CONTEXT SETUP RESPONSE message sent by gNB-DU to gNB-CU, GNB-DU CONFIGURATION UPDATE message sent by gNB-DU to gNB-CU, GNB sent by gNB-CU to gNB-DU -DU CONFIGURATION UPDATE ACKNOWLEDGE message, GNB-DU CONFIGURATION UPDATE FAILURE message sent by gNB-CU to gNB-DU, GNB-CU CONFIGURATION UPDATE message sent by gNB-CU to g
  • the first network device and the second network device may also be CUs.
  • the GNB-CU-UP E1 SETUP REQUEST message sent by gNB-CU-UP to gNB-CU-CP the GNB-CU-UP E1 SETUP RESPONSE message sent by gNB-CU-CP to gNB-CU-UP
  • the gNB-CU-UP E1 SETUP RESPONSE message GNB-CU-UP E1 SETUP FAILURE message sent by CU-CP to gNB-CU-UP
  • GNB-CU-CP E1 SETUP FAILURE message sent by gNB-CU-CP the GNB-CU-CP E1 SETUP FAILURE message sent by gNB-CU-CP
  • the Reasonable decisions can be made in subsequent access control or handover judgments or in other scenarios, so that the access/handover of terminal equipment can meet the communication policy requirements of the country/operator where its location belongs, avoiding the need for terminals
  • the device is accessing from a country/operator other than its location.
  • FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device 1000 includes a transceiver module 1010 and a processing module 1020 .
  • the communication apparatus may be used to implement the functions related to a network device (eg, a first network device or a target 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 transceiver module 1010 is configured to receive a handover request message from the source network device, and the handover request message is used for Request to switch the terminal device to the target network device, the handover request message includes the location information of the terminal device, and the first public land mobile network PLMN to which the source network device belongs when the terminal device communicates with the source network device or the source network device is connected.
  • the processing module 1020 is configured to, according to the location information of the terminal equipment, determine that the location of the terminal equipment is located in the first area covered by the target cell, and the first area corresponds to The PLMN does not include the first PLMN, or the AMF corresponding to the first area does not include the first AMF, wherein the target network device manages the target cell; the transceiver module 1010 is further configured to send a handover failure message to the source network device.
  • the handover failure message includes one or more of the following information: failure cause information, information about the PLMN that the target network device allows the terminal device to access, and the target network device allows the terminal device to access The information of the AMF; wherein, the failure cause information is used to indicate that the handover failure cause is invalid PLMN, or invalid AMF, or invalid location information, or illegal request.
  • the handover failure message includes location information of at least one area covered by the target cell, and information of the PLMN and/or AMF corresponding to the at least one area.
  • the transceiver module 1010 is configured to send a handover request message to the target network device, where the handover request message is used to request the terminal device Handover to the target network device, the handover request message includes the location information of the terminal device, and the information of the first public land mobile network PLMN to which the source network device belongs when the terminal device communicates with the source network device or the first connection of the source network device. information of the access and mobility management function AMF; the transceiver module 1010 is further configured to receive a handover failure message from the target network device.
  • the handover failure message includes one or more of the following information: failure cause information, information about the PLMN that the target network device allows the terminal device to access, and the target network device allows the terminal device to access The information of the AMF; wherein, the failure cause information is used to indicate that the handover failure cause is an invalid PLMN, or an invalid AMF, or invalid location information, or an illegal request.
  • the handover failure message includes location information of at least one area covered by the target cell, and information of the PLMN and/or AMF corresponding to the at least one area.
  • the transceiver module 1010 is further configured to send location measurement configuration information to the terminal device, where the location measurement configuration information instructs the terminal device to perform location measurement; the processing module 1020 is configured to acquire the location information of the terminal device.
  • the transceiver module 1010 is used to obtain the location information of the terminal device; the processing module 1020 is used to obtain the location information of the terminal device according to the location information of the terminal device.
  • the target network device sends a handover request message, the handover request message is used to request the terminal device to be handed over to the target network device, the handover request message includes first information, the first information indicates that the PLMN requesting access is the second PLMN or the request
  • the transceiver module 1010 is further configured to send a first message to the terminal device, where the first message includes first indication information, where the first indication information instructs the terminal device to report at least one area covered by the target cell location information, and the information of the PLMN and/or the AMF corresponding to the at least one area; the transceiver module 1010 is further configured to receive a second message from the terminal device, where the second message includes at least one coverage of the target cell. The location information of the area, and the information of the PLMN and/or the AMF corresponding to the at least one area.
  • the transceiver module 1010 is further configured to receive a third message from the target network device, where the third message includes location information of at least one area covered by the target cell, and the corresponding information of the at least one area. PLMN information and/or AMF information.
  • the transceiver module 1010 is configured to send a first message to the terminal device, where the first message includes first indication information, the The first indication information instructs the terminal equipment to report the location information of at least one area covered by the neighboring cell, and the information of the public land mobile network PLMN and/or the information of the access and mobility management function AMF corresponding to the at least one area; the transceiver module 1010 is also used to receive a second message from the terminal device, where the second message includes the location information of at least one area covered by the neighbor cell, and the information of the PLMN and/or the AMF corresponding to the at least one area .
  • the transceiver module 1010 is further configured to send location measurement configuration information to the terminal device, where the location measurement configuration information instructs the terminal device to perform location measurement; the network device receives the location information sent by the terminal device.
  • the first message further includes second indication information, where the second indication information instructs the terminal device to report the cell global identifier CGI of the neighboring cell.
  • the processing module 1020 is configured to generate a third message, where the third message includes the first network device managed by the first network device.
  • the transceiver module 1010 is further configured to receive a fourth message from the second network device, where the fourth message includes location information of at least one area covered by the second cell managed by the second network device, and the information of the PLMN and/or the information of the AMF corresponding to at least one area covered by the second cell.
  • the processing module 1020 involved in the communication apparatus may be implemented by at least one processor or processor-related circuit components
  • the transceiver module 1010 may be implemented by at least one transceiver or transceiver-related circuit components or communication interfaces.
  • the operations and/or functions of the respective modules in the communication device are to implement the corresponding flow of the method shown in FIG. 3 , FIG. 4 , FIG. 5 , FIG. 6 , FIG. 7 , FIG. 8 or FIG. Repeat.
  • the communication device may further include a storage module, the storage module may be used to store data and/or instructions, the transceiver module 1010 and/or the processing module 1020 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. 11 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 target 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) 1101 and one or more baseband units (baseband unit, BBU) (also referred to as digital units, digital units, DUs) )1102.
  • the RRU 1101 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 11011 and a radio frequency unit 11012.
  • the RRU 1101 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 1102 is mainly used to perform baseband processing, control the base station, and the like.
  • the RRU 1101 and the BBU 1102 may be physically set together, or may be physically separated, that is, a distributed base station.
  • the BBU 1102 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) 1102 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 1102 may be composed of one or more single boards, and the multiple single 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 1102 may also include a memory 11021 and a processor 11022, and the memory 11021 is used to store necessary instructions and data.
  • the processor 11022 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 11021 and the processor 11022 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. 12 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • the communication device 1200 includes a transceiver module 1210 and a processing module 1220 .
  • 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 1210 is configured to receive a first message from a network device, where the first message includes the first message. Indication information, the first indication information instructs the terminal device to report the location information of at least one area covered by a neighboring cell, and the information of the public land mobile network PLMN and/or the access and mobility management function AMF corresponding to the at least one area
  • the processing module 1220 is configured to, according to the first indication information, obtain the location information of at least one area covered by the neighboring cell, and the information of the PLMN and/or the AMF corresponding to the at least one area; the transceiver module 1210 It is also used for sending a second message to the network device, where the second message includes the location information of at least one area covered by the neighboring cell, and the information of the PLMN and/or the AMF corresponding to the at least one area.
  • the transceiver module 1210 is further configured to receive location measurement configuration information from the network device, where the location measurement configuration information instructs the terminal device to perform location measurement; the processing module 1220 is further configured to, according to the location measurement configuration The position measurement is performed according to the indication of the device; the transceiver module 1210 is further configured to send the measured position information of the terminal device to the network device.
  • the first message further includes second indication information, where the second indication information instructs the terminal device to report the cell global identifier CGI of the neighbor cell.
  • the processing module 1220 involved in the communication apparatus may be implemented by at least one processor or a processor-related circuit component, and the transceiver module 1210 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 1210 and/or the processing module 1220 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, may also include a memory, and of course, 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. 13 only one memory and processor are shown in FIG. 13 . 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 1310 and a processing unit 1320 .
  • 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 1310 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 1310 may be regarded as a transmitting unit, that is, the transceiver unit 1310 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 1310 is configured to perform the sending and receiving operations on the terminal device side in the above method embodiments
  • processing unit 1320 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 .
  • Embodiments of the present application further provide a computer program product, which, when the computer reads and executes the computer program product, 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 at least one network device and at least one terminal device, and the at least one network device may include a source network device and a target network device, or may include a first network device and a second network device. 2. 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 displayed 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.
  • 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：目标网络设备接收来自源网络设备的切换请求消息，该切换请求消息包括终端设备的位置信息以及源网络设备所属的第一PLMN的信息或源网络设备连接的第一AMF的信息；目标网络设备根据终端设备的位置信息，确定终端设备所处的位置位于目标小区覆盖的第一区域内，且该第一区域对应的PLMN中不包括第一PLMN，或者第一区域对应的AMF中不包括第一AMF，则向源网络设备发送切换失败消息。采用该技术方案，可以使得终端设备的接入/切换过程符合其位置所属的国家/运营商的通信策略要求，避免终端设备从非其位置所属的国家/运营商接入。

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，或者，卫星可以通过广播多个接入与移动性管理功能(access and mobility management function，AMF)的信息来指示其可以支持多个国家或运营商的服务。
在小区切换的过程中，如果目标小区为支持多个PLMN或多个AMF的NTN小区，由于不同PLMN或不同AMF对应的通信策略不同，如果采用现有技术中仅根据小区质量来确定切换到目标小区的方案，则可能存在终端设备请求接入到与其位置不匹配的PLMN或AMF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或AMF的通信策略要求，进而会导致切换流程失败，影响通信性能。
发明内容
本申请提供一种通信方法及装置，用于提供一种当目标小区为支持多个PLMN或多个AMF的NTN小区时的小区切换方法，使得终端设备的切换过程能够符合其位置所属的国家或运营商的通信策略要求，从而有效提高切换成功率。
第一方面，本申请实施例提供一种通信方法，该方法可以由目标网络设备执行，也可以由配置于目标网络设备的部件(例如芯片或者电路)执行，在本申请下文的描述中，将以目标网络设备执行该方法为例进行说明。
该方法包括：目标网络设备接收来自源网络设备的切换请求消息，该切换请求消息用于请求将终端设备切换到目标网络设备，该切换请求消息中包括终端设备的位置信息，以及终端设备在与源网络设备通信时源网络设备所属的第一PLMN的信息或源网络设备连接的第一AMF的信息；目标网络设备根据终端设备的位置信息，确定终端设备所处的位置位于目标小区覆盖的第一区域内，且该第一区域对应的PLMN中不包括第一PLMN，或者第一区域对应的AMF中不包括第一AMF，其中，目标网络设备管理目标小区；目标网络设备向源网络设备发送切换失败消息。
采用该技术方案，目标网络设备可以根据自身的目标小区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系、以及终端设备的位置信息，在需要进行准入控制或切 换判决或其他场景时做出合理的判决，确定终端设备能接入/切换至的目标网络设备所属的PLMN或目标网络设备连接的AMF，从而使得终端设备的接入/切换过程符合其位置所属的国家/运营商的通信策略要求，避免终端设备从非其位置所属的国家/运营商接入。
在第一方面的一种可能的设计中，所述切换失败消息中包括下列信息中的一项或多项：失败原因信息、目标网络设备允许终端设备接入的PLMN的信息、目标网络设备允许终端设备接入的AMF的信息；其中，失败原因信息用于指示切换失败原因为无效的PLMN，或者无效的AMF，或者无效的位置信息，或者非法请求。
在第一方面的一种可能的设计中，所述切换失败消息中包括目标小区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应PLMN的信息和/或AMF的信息。
第二方面，本申请实施例提供一种通信方法，该方法可以由源网络设备执行，也可以由配置于源网络设备的部件(例如芯片或者电路)执行，在本申请下文的描述中，将以源网络设备执行该方法为例进行说明。
该方法包括：源网络设备向目标网络设备发送切换请求消息，该切换请求消息用于请求将终端设备切换到目标网络设备，该切换请求消息中包括终端设备的位置信息，以及终端设备在与源网络设备通信时源网络设备所属的第一PLMN的信息或源网络设备连接的第一AMF的信息；源网络设备接收来自目标网络设备的切换失败消息。
在第二方面的一种可能的设计中，所述切换失败消息中包括下列信息中的一项或多项：失败原因信息、目标网络设备允许终端设备接入的PLMN的信息、目标网络设备允许终端设备接入的AMF的信息；其中，所述失败原因信息用于指示切换失败原因为无效的PLMN，或者无效的AMF，或者无效的位置信息，或者非法请求。
在第二方面的一种可能的设计中，所述切换失败消息中包括所述目标小区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应PLMN的信息和/或AMF的信息。
在第二方面的一种可能的设计中，该方法还包括：源网络设备向终端设备发送位置测量配置信息，该位置测量配置信息指示终端设备进行位置测量；源网络设备获取终端设备的位置信息。
第三方面，本申请实施例提供一种通信方法，该方法可以由源网络设备执行，也可以由配置于源网络设备的部件(例如芯片或者电路)执行，在本申请下文的描述中，将以源网络设备执行该方法为例进行说明。
该方法包括：源网络设备获取终端设备的位置信息；源网络设备根据终端设备的位置信息，确定终端设备位于目标小区覆盖的第一区域内，且目标小区覆盖的第一区域对应第二PLMN或第二AMF；源网络设备向目标网络设备发送切换请求消息，该切换请求消息用于请求将终端设备切换到目标网络设备，该切换请求消息中包括第一信息，该第一信息指示请求接入的PLMN为第二PLMN或者请求连接的AMF为第二AMF；源网络设备接收来自目标网络设备的切换请求确认消息。
采用上述技术方案，根据目标小区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系，源网络设备可以向目标网络设备发送请求接入的PLMN的信息或者请求连接的AMF的信息，使得目标网络设备能够将终端设备接入/切换到与终端设备的位置相对应的PLMN或AMF，从而使得终端设备的接入/切换过程符合其位置所属的国家/运营商的通信策略要求，避免终端设备从非其位置所属的国家/运营商接入，并有效提高切换成功率。
在第三方面的一种可能的设计中，该方法还包括：源网络设备向终端设备发送第一消 息，该第一消息中包括第一指示信息，该第一指示信息指示终端设备上报目标小区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息；源网络设备接收来自终端设备的第二消息，该第二消息中包括目标小区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息。
在第三方面的一种可能的设计中，该方法还包括：源网络设备接收来自目标网络设备的第三消息，该第三消息中包括目标小区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息。
第四方面，本申请实施例提供一种通信方法，该方法可以由终端设备执行，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。
该方法包括：终端设备接收来自网络设备的第一消息，该第一消息中包括第一指示信息，该第一指示信息指示终端设备上报邻区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息；终端设备根据第一指示信息，获取所述邻区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息；终端设备向网络设备发送第二消息，该第二消息中包括所述邻区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息。
采用上述技术方案，终端设备可以进行邻区覆盖的至少一个区域与PLMN/AMF之间的映射关系信息的获取/上报，如此，可使终端设备的服务网络设备在获取到相邻的网络设备的上述映射关系后，可以根据该映射关系并结合终端设备的位置信息，对终端设备做出合理的切换判决/切换请求/准纳控制，从而使得终端设备的切换/接入可以符合其位置所属的国家/运营商的通信策略要求，避免终端设备从非其位置所属的国家/运营商接入。
在第四方面的一种可能的设计中，该方法还包括：终端设备接收来自网络设备的位置测量配置信息，该位置测量配置信息指示终端设备进行位置测量；终端设备向网络设备发送终端设备的位置信息。
在第四方面的一种可能的设计中，所述第一消息中还包括第二指示信息，该第二指示信息指示终端设备上报所述邻区的小区全局标识CGI。
第五方面，本申请实施例提供一种通信方法，该方法可以由网络设备执行，也可以由配置于网络设备的部件(例如芯片或者电路)执行，在本申请下文的描述中，将以网络设备执行该方法为例进行说明。
该方法包括：网络设备向终端设备发送第一消息，该第一消息中包括第一指示信息，该第一指示信息指示终端设备上报邻区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息；网络设备接收来自终端设备的第二消息，该第二消息中包括所述邻区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息。
在第五方面的一种可能的设计中，该方法还包括：网络设备向终端设备发送位置测量配置信息，该位置测量配置信息指示终端设备进行位置测量；网络设备接收终端设备发送的位置信息。
在第五方面的一种可能的设计中，该第一消息中还包括第二指示信息，该第二指示信息指示终端设备上报所述邻区的小区全局标识CGI。
第六方面，本申请实施例提供一种通信方法，该方法可以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。
该方法包括：第一网络设备生成第三消息，该第三消息中包括第一网络设备管理的第一小区覆盖的至少一个区域的位置信息，以及所述第一小区覆盖的至少一个区域对应的PLMN的信息和/或AMF的信息；第一网络设备向第二网络设备发送该第三消息。
在第六方面的一种可能的设计中，该方法还包括：第一网络设备接收来自第二网络设备的第四消息，该第四消息中包括第二网络设备管理的第二小区覆盖的至少一个区域的位置信息，以及所述第二小区覆盖的至少一个区域对应的PLMN的信息和/或AMF的信息。
采用上述技术方案，可以实现在网络设备之间交互各自小区覆盖的至少一个区域与PLMN/AMF之间的映射关系，从而使得第一网络设备或第二网络设备可以在获取到对方的映射关系后，可以基于该映射关系，在后续需要进行例如接入控制或切换判决时或是在其他场景中可以做出合理的决策，从而使得终端设备的接入/切换可以符合其位置所属的国家/运营商的通信策略要求，避免终端设备从非其位置所属的国家/运营商接入。
第七方面，本申请实施例提供一种通信装置，该装置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目标网络设备的功能，或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源网络设备的功能，或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源网络设备的功能，或具有实现上述第五方面或第五方面的任一种可能的设计中网络设备的功能，或具有实现上述第六方面或第六方面的任一种可能的设计中第一网络设备的功能。该装置可以为网络设备，也可以为网络设备中包括的芯片或电路。
该通信装置也可以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终端设备的功能。该装置可以为终端设备，也可以为终端设备中包括的芯片或电路。
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目标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源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源网络设备相应的功能，或者执行上述第四方面或第四方面的任一种可能的设计中终端设备相应的功能，或者执行上述第五方面或第五方面的任一种可能的设计中网络设备相应的功能，或者执行上述第六方面或第六方面的任一种可能的设计中第一网络设备相应的功能。收发模块用于支持该装置与其他通信设备之间的通信，例如该装置为目标网络设备时，可接收来自源网络设备的切换请求消息。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，通信模块可以为收发器，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，或者执行上述第四方面或第四方面的任一种可能的设计中的方法，或者执行上述第五方面或第 五方面的任一种可能的设计中的方法，或者执行上述第六方面或第六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中包含的芯片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。
第八方面，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，或实现上述第四方面或第四方面的任一种可能的设计中的方法，或实现上述第五方面或第五方面的任一种可能的设计中的方法，或实现上述第六方面或第六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。
第九方面，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，或执行上述第四方面或第四方面的任一种可能的设计中的方法，或执行上述第五方面或第五方面的任一种可能的设计中的方法，或执行上述第六方面或第六方面的任一种可能的设计中的方法。
第十方面，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，或执行上述第四方面或第四方面的任一种可能的设计中的方法，或执行上述第五方面或第五方面的任一种可能的设计中的方法，或执行上述第六方面或第六方面的任一种可能的设计中的方法。
第十一方面，本申请实施例提供一种通信系统，该通信系统包括网络设备和至少一个终端设备。可选的，该通信系统中的网络设备可以包括源网络设备和目标网络设备。可选的，所述网络设备可以包括第一网络设备和/或第二网络设备。可选的，该通信系统中还可包括核心网设备。
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逻辑小区的示意图；
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为本申请实施例中网络设备为终端设备配置位置测量的示意图；
图5为本申请实施例提供的一种通信方法的一个具体示例的示意图；
图6为本申请实施例提供的一种通信方法的另一个具体示例的示意图；
图7为本申请实施例提供的另一种通信方法的流程示意图；
图8为本申请实施例提供的又一种通信方法的流程示意图；
图9为本申请实施例提供的另一种通信方法的流程示意图；
图10为本申请实施例提供的一种通信装置的结构示意图；
图11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12为本申请实施例提供的另一种通信装置的结构示意图；
图13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AMF的信息(如AMF标识信息等)来指示其可以支持多个国家/运营商的服务，终端设备可以根据自身位置、小区覆盖的区域信息与PLMN/AMF之间的映射关系，确定出合适的PLMN/AMF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/AMF1的信息、以及PLMN2/AMF2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。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/AMF，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。
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。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、源网络设备向目标网络设备发送切换请求消息，该切换请求消息用于请求将终端设备切换到目标网络设备。相应的，目标网络设备可以接收来自源网络设备的切换请求消息。
该切换请求消息中包括终端设备的位置信息，以及该终端设备在与源网络设备通信时源网络设备所属的第一PLMN的信息或源网络设备连接的第一AMF的信息。其中，PLMN的信息可以包括PLMN的标识信息，例如，PLMN-identifier。类似的，AMF的信息可以包括AMF的标识信息，例如，AMF-identifier。
在一些场景中，若目标小区可以支持/对应多个PLMN和/或多个AMF，但是源网络设备不知道目标小区覆盖的至少一个区域与目标小区支持/对应的PLMN和/或AMF之间的映射关系，那么如果终端设备通过PLMN1或AMF1接入源小区，源终端设备在请求将终端设备切换到目标小区时，通常也会请求通过PLMN1或AMF1接入目标小区。鉴于此，切换请求消息中包括第一PLMN的信息也可以理解为，终端设备请求通过该第一PLMN接入目标小区，或者终端设备认为请求接入的目标小区属于第一PLMN。类似的，切换请求消息中包括第一AMF的信息也可以理解为，终端设备请求通过第一AMF接入目标小区，或者终端设备认为请求接入的目标小区是第一AMF负责管理的小区，或者，终端设备认为请求接入的目标网络设备所连接的AMF是第一AMF。
本申请实施例中，切换请求消息中的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源网络设备从终端设备处接收的，例如，源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源网络设备从其他网络设备处接收的，例如，源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源网络设备自行确定的，例如，源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源网络设备通过其它方式获取到的，本申请并不限定。
在一种可能的实施方式中，在源网络设备向目标网络设备发送切换请求消息之前，源网络设备可以配置终端设备进行位置测量。具体的，如图4中的步骤S304至步骤S305所示，源网络设备可以向终端设备发送位置测量配置信息，该位置测量配置信息用于指示终端设备进行位置测量。进而，终端设备可根据该位置测量配置信息进行位置测量，并将测量到的自身的位置信息通过测量报告发送给源网络设备。
步骤S302、目标网络设备根据终端设备的位置信息，确定终端设备所处的位置位于目标小区覆盖的第一区域内，且该第一区域对应的PLMN中不包括第一PLMN，或者第一区域对应的AMF中不包括第一AMF。
步骤S303、目标网络设备向源网络设备发送切换失败消息，该切换失败消息用于拒绝将终端设备切换到目标网络设备。相应的，源网络设备可以接收来自目标网络设备的切换失败消息。
也就是说，本申请实施例中，目标网络设备可根据终端设备的位置信息、目标小区覆盖的至少一个区域的位置信息以及所述至少一个区域对应的PLMN的信息和/或AMF的信息，来判断是否允许终端设备接入目标网络设备。
需要说明的是，所述目标小区覆盖的至少一个区域的位置信息以及所述至少一个区域对应的PLMN的信息和/或AMF的信息可以理解为，目标小区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系。其中，所述至少一个区域对应的PLMN的信息和/或AMF的信息，可以是所述至少一个区域中的每个区域对应的PLMN的信息和/或AMF的信息，也可以是所述至少一个区域中的部分区域对应的PLMN的信息和/或AMF的信息，本申请并不限定。而且，不同区域对应的PLMN的信息和/或AMF的信息可以相同，也可以不同，本申请同样不作限定。
具体的，当终端设备所在的位置位于目标小区覆盖的第一区域内，但是该第一区域对应的PLMN中不包括源网络设备所属的第一PLMN，或者该第一区域对应的AMF中不包括源网络设备连接的第一AMF时，目标网络设备可以拒绝该终端设备切换到目标网络设备。进而，目标网络设备可以向源网络设备发送切换失败消息。所述切换失败消息也可以称为切换准备失败消息，或具有其他名称，本申请并不限定。
可选的，所述切换失败消息中可以包括下列信息中的一项或多项：
1)失败原因信息或切换失败原因值，用于指示切换失败原因为无效或错误的PLMN，或者无效或错误的AMF，或者无效的位置信息，或者非法请求，或者不支持请求的PLMN，或者不支持请求的AMF等。其中，无效或错误的PLMN是指目标网络设备不属于切换请求消息中所请求的PLMN；无效或错误的AMF是指切换请求消息中所请求的AMF不负责管理目标网络设备；非法请求是指目标网络设备不支持终端设备的切换请求，或者目标网络设备不支持切换请求消息中所请求的PLMN或AMF。
2)目标网络设备允许终端设备接入的PLMN的信息，或者目标网络设备允许终端设备接入的目标小区所属的PLMN的信息，或者目标网络设备所属的PLMN的信息。
应注意，目标网络设备允许终端设备接入的PLMN的信息可以包括：目标小区对应的允许终端设备接入的PLMN的信息，和/或，属于目标网络设备的其他非目标小区的对应的允许终端设备接入的PLMN的信息。
3)目标网络设备允许终端设备接入的AMF的信息，或者管理目标网络设备允许终端设备接入的目标小区的AMF的信息，或者管理目标网络设备的AMF的信息。
应注意，目标网络设备允许终端设备接入的AMF的信息可以包括：目标小区对应的允许终端设备接入的AMF的信息，和/或，属于目标网络设备的其他非目标小区对应的允许终端设备接入的AMF的信息。
可选的，所述切换失败消息中还可以包括：目标小区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息。即，通过该切换失败消息指示最新的或可用的目标小区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系。
可选的，所述切换失败消息中还可以包括：属于目标网络设备的其他非目标小区所覆盖的至少一个区域的位置信息，以及与所述其他非目标小区所覆盖的至少一个区域对应的PLMN的信息和/或AMF的信息。即，通过该切换失败消息还指示属于目标网络设备的其他非目标小区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系。
可以理解，属于目标网络设备的其他非目标小区可以有一个或多个。当属于目标设备的其他非目标小区的小区有多个时，所述切换失败消息中可以指示所述其他非目标小区的小区中的全部或部分小区对应的小区覆盖的区域与PLMN和/或AMF之间的映射关系，本申请并不限定。
如此，源网络设备接收到该切换失败消息后，可根据该切换失败消息中包含的信息，确定出当前位置的终端设备接入目标网络设备/目标小区时所对应的正确的PLMN或AMF的信息，进而再次发送切换请求消息，请求将终端设备切换到目标小区中与其位置相匹配的逻辑小区。
当确定终端设备所处的位置位于目标小区覆盖的第一区域内，而且该第一区域对应的PLMN中包括第一PLMN，或者，该第一区域对应的AMF中包括第一AMF时，那么目标网络设备可确定允许终端设备切换到目标小区或对应第一PLMN/第一AMF的属于目标网络设备的小区，并向源网络设备发送切换请求确认消息，该切换请求确认消息表示允许将终端设备切换到目标网络设备。进而，源网络设备可以向终端设备发送切换消息，指示终端设备切换到目标小区。
举例来说，UE1同时支持PLMN1和PLMN2，UE2同时支持PLMN1和PLMN2。UE1和UE2的位置如图2所示，即UE1和UE2都位于目标小区的覆盖范围内，但是UE1位于 目标小区中与PLMN1/AMF1对应的区域内，UE2位于目标小区中与PLMN2/AMF2对应的区域内。
如此，若当前UE1、UE2接入基站为属于PLMN1的源基站，并请求切换到属于PLMN1的目标基站。那么对于UE1，由于位于源小区边缘的UE1位于目标小区中与PLMN1/AMF1对应的区域内，目标基站可以确定允许UE1切换到其下的属于PLMN1的目标小区或PLMN1对应的逻辑小区，或者说，目标基站可以确定允许UE1切换到其下的受AMF1管理的目标小区或AMF1对应的逻辑小区。后续，针对UE1，目标基站可以向源基站发送切换请求确认消息。进而，源基站接收到该切换请求确认消息后，可以向UE1发送切换消息，指示UE1执行到目标小区的切换。所述切换消息也可以称为重配置消息，或者也可以具有其他名称，本申请不作限定。
对于UE2，由于位于源小区边缘的UE2位于目标小区中与PLMN2/AMF2对应的区域内，目标基站可以确定自身无法支持UE2切换到其下的属于PLMN1的目标小区或PLMN1对应的逻辑小区，或者，目标基站可以确定自身无法支持UE2切换到其下的属于AMF1的目标小区或AMF1对应的逻辑小区，即目标基站需要拒绝UE2的切换请求。后续，针对UE2，目标基站可以向源基站发送切换失败消息。进而，源基站接收到该切换失败消息后，可以根据该切换失败消息中包括的允许UE2接入的PLMN为PLMN2或允许UE2接入的AMF为AMF2的指示信息，再次向目标基站发送切换请求消息，请求将UE2切换到其下的属于PLMN2的目标小区或受AMF2管理的目标小区。
由此可知，采用该技术方案，目标网络设备可以根据自身的目标小区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系，在需要进行准入控制或切换判决或其他场景时做出合理的判决，允许终端设备接入/切换到与其位置相对应的PLMN/AMF，从而使得终端设备的接入/切换过程符合其位置所属的国家/运营商的通信策略要求，避免终端设备从非其位置所属的国家/运营商接入。
进一步地，在上述切换过程中，目标网络设备还可以与源网络设备交互目标小区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系。如此，可便于源网络设备后续根据该映射关系和终端设备自身的位置进行合理的判断，请求将终端设备切换到与其位置对应的逻辑小区，从而有效提高切换成功率。
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源网络设备与目标网络设备之间存在直接连接的接口的场景，源网络设备和目标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，本发明不做限定。图6所示的具体示例对应于源网络设备与目标网络设备之间不存在直接连接的接口的场景，源网络设备和目标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，本发明不做限定。
如图5所示，在步骤S501中，UE可以向源基站发送测量报告，可选的，该测量报告中包括UE的位置信息。在步骤S502中，源基站可以向目标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UE请求接入的PLMN1的信息和/或AMF1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，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。UE请求接入的PLMN1可以是UE在源小区中接入的PLMN或者是源小区属于的PLMN，类似的，UE请求接入的AMF1可以是源基站在源小区中连接的AMF或者是管理源小区的AMF。
在步骤S503中，目标基站可根据UE的位置信息，以及目标小区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系，判断是否允许该UE切换到目标小区。具体的，若UE所处的位置位于目标小区覆盖的某个区域内，但是该区域对应于PLMN2和/或AMF2，那么目标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切换到其下的属于PLMN1的目标小区或拒绝该UE切换到其下的受AMF1管理的目标小区。于是，目标基站可以在步骤S504中向源基站发送切换失败消息，并在切换失败消息中携带切换失败原因值，以及用于指示最新的或可用的目标小区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系的信息。如此，针对该UE，源基站后续可以根据目标小区的该映射关系以及UE的位置信息，确定出UE需要切换至的目标小区所属的PLMN，或管理需要切换至的目标小区的AMF。进而，可选的，源基站可以再次发起将UE切换到与其位置相匹配的目标小区/目标小区所属的PLMN/管理目标小区的AMF的切换请求，以使该UE可以成功接入目标小区。而对于后续需要进行切换的其他UE，源基站可以根据该映射关系、以及UE的位置信息，确定出与UE的位置相匹配的PLMN和/或AMF，进而直接发起将UE切换到与其位置相匹配的目标小区/目标AMF的切换请求，从而有效提高切换成功率。
如图6所示，在步骤S601中，UE可以向源基站发送测量报告，可选地，该测量报告中包括UE的位置信息。在步骤S602中，源基站可以向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UE请求接入的PLMN1的信息和/或AMF1的信息。该第一切换请求消息可以是HO required消息或其他，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。UE请求接入的PLMN1可以是UE在源小区中接入的PLMN或者是源小区属于的PLMN，类似的，UE请求接入的AMF1可以是源基站连接的AMF或者是管理源小区的AMF。
进而，在步骤S603中，AMF1可以向目标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UE请求接入的PLMN1的信息和/或AMF1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。
在步骤S604中，目标基站可根据UE的位置信息，以及目标小区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系，判断是否允许该UE切换到目标小区。具体的，若UE所处的位置位于目标小区覆盖的某个区域内，但是该区域对应于PLMN2和/或AMF2，那么目标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切换到其下的属于PLMN1的小区(如上述目标小区)或拒绝该UE切换到其下的受AMF1管理的小区(如上述目标小区)。于是，目标基站可以在步骤S605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切换失败原因值，以及用于指示最新的或可用的目标小区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系的信息，切换失败原因值例如可以是无效或错误的PLMN，或者是无效或错误的AMF。该第一切换失败消息可以是handover failure消息或其他消息，不作限定。
后续，在步骤S606中，AMF1可以向源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切换失败原因值，以及用于指示最新的或可用的目标小区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系的信息，切换失败原因值例如可以是无效或错误的PLMN，或者是无效或错误AMF。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，源基站可以接收该第二切换失败消息。
如此，针对该UE，源基站后续可以根据目标小区的该映射关系以及UE的位置信息，确定出与UE需要切换至的目标小区所属的PLMN，或管理需要切换至的目标小区的AMF，进而，可选的，源基站可以再次发起将UE切换到与其位置相匹配的目标小区/目标小区所属的PLMN/管理目标小区的AMF的切换请求，以使该UE可以成功切换到目标小区。而针对后续需要进行切换的其他UE，源基站可以根据目标小区的该映射关系以及UE的位置信息，确定出与UE的位置相匹配的PLMN和/或AMF，进而发起将UE切换到与其位置相匹配的目标小区/目标AMF的切换请求，从而有效提高切换成功率。
需要说明的是，图6所示的具体示例是以源基站与目标基站属于同一个AMF为例进行说明的，即图中所示的AMF1。可以理解，源基站与目标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、切换失败原因、用于目标基站覆盖的至少一个区域与PLMN和/或AMF之间的映射关系的信息等中的一项或多项，在此不再赘述。
请参考图7，为本申请实施例提供的另一种通信方法的流程示意图，该方法包括：
步骤S701、源网络设备获取终端设备的位置信息。
本申请实施例中，所述终端设备的位置信息可以包括经度信息、纬度信息、高度信息中的一项或多项，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。在另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。
进一步的，源网络设备可以从终端设备处获取该终端设备的位置信息，例如，源网络设备可以接收终端设备上报的测量报告，该测量报告中包括终端设备测量到的自己的位置信息。或者，源网络设备也可以从其他网络设备处获取该终端设备的位置信息，例如从核心网设备处获取该终端设备的位置信息。再或者，源网络设备也可以自行确定终端设备的位置信息，例如，源网络设备可以对终端设备进行位置定位，进而获取该终端设备的位置 信息。源网络设备也可以通过其它方式获取终端设备的位置信息，本申请并不限定。
可选的，若源网络设备通过终端设备上报的测量报告获取终端设备的位置信息，那么在源网络设备接收终端设备上报的测量报告之前，源网络设备还可以配置终端设备进行位置测量。具体的，源网络设备可以向终端设备发送位置测量配置信息，该位置测量配置信息用于指示终端设备进行位置测量。进而，终端设备可将测量到的位置信息通过测量报告发送给源网络设备。
步骤S702、源网络设备根据终端设备的位置信息，确定终端设备位于目标小区覆盖的第一区域内，且目标小区的覆盖的第一区域对应第二PLMN或第二AMF。
步骤S703、源网络设备向目标网络设备发送切换请求消息，该切换请求消息用于请求将终端设备切换到目标网络设备，该切换请求消息中可以包括第一信息，该第一信息指示请求接入的PLMN为第二PLMN或请求连接的AMF为第二AMF。即，第一信息可以为第二PLMN的信息和/或第二AMF的信息。
若第一信息指示请求接入的PLMN为第二PLMN，则该第一信息中可以包括第二PLMN的信息，表示请求接入到第二PLMN对应的小区或请求接入到属于第二PLMN的目标小区或请求接入的目标小区属于第二PLMN，其中，PLMN的信息可以包括PLMN的标识信息，如PLMN-identifier。类似的，若第一信息指示请求连接的AMF为第二AMF，则该第一信息中可以包括第二AMF的信息，表示请求接入到第二AMF对应的小区或请求接入到受第二AMF管理的目标小区或请求接入的目标小区受第二AMF管理，其中，AMF的信息可以包括AMF的标识信息，如AMF-identifier。
本申请实施例中，源网络设备可以根据终端设备的位置信息、目标小区覆盖的至少一个区域的位置信息，以及该至少一个区域对应的PLMN的信息和/或AMF的信息，确定出终端设备当前所处的位置位于目标小区覆盖的第一区域内，且该第一区域对应第二PLMN或第二AMF。进而，可以向目标网络设备发送切换请求消息，以请求将终端设备切换到属于第二PLMN的小区或受第二AMF管理的小区。
如上文所述，所述目标小区覆盖的至少一个区域的位置信息以及所述至少一个区域对应的PLMN的信息和/或AMF的信息可以理解为，用于指示目标小区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系。
在一种可能的实施方式中，源网络设备可以从终端设备处接收用于指示目标小区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系的信息。该实施方式的具体过程可以参考下文中关于步骤S801至步骤S803中的相关描述。
在另一种可能的实施方式中，源网络设备可以从目标网络设备处接收用于指示目标小区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系的信息。需要说明的是，所述从目标网络设备处接收用于指示上述映射关系的信息可以是指，源网络设备通过之前与目标网络设备之间执行的切换过程中的切换失败消息或切换准备失败消息接收指示该映射关系的信息，如上文中步骤S303所述；或者，也可以是，在非切换场景下，源网络设备与相邻的网络设备相互交互各自小区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系信息的过程中接收到的，该过程的详细介绍可以参考下文中关于步骤S901至步骤S903中的相关描述。
步骤S704、目标网络设备向源网络设备发送切换请求确认消息。相应的，源网络设备可以接收来自目标网络设备的切换请求确认消息。
由此可知，采用该技术方案，源网络设备可以根据目标小区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系，在需要进行切换判决或其他场景时做出合理的判决，请求将终端设备接入/切换到与其位置相对应的合适的目标小区/PLMN/AMF，从而使得终端设备的接入/切换过程符合其位置所属的国家/运营商的通信策略要求，避免终端设备从非其位置所属的国家/运营商接入，并有效提高切换成功率。
需要说明的是，与图5、图6中所示的切换过程类似，上述步骤S701至步骤S704中所描述的切换过程可以基于接入网设备间的直接连接的接口(如Xn或X2接口)实现，也可以基于接入网设备与核心网设备间的接口(如NG或S1接口)实现，本申请在此不再逐一举例。
请参考图8，为本申请实施例提供的又一种通信方法的流程示意图，该方法包括：
步骤S801、网络设备向终端设备发送第一消息，该第一消息中包括第一指示信息，该第一指示信息指示该终端设备获取和/或上报邻区覆盖的至少一个区域的位置信息，以及该至少一个区域对应的PLMN的信息和/或AMF的信息。
相应的，终端设备可以接收来自网络设备的上述第一消息。
本申请实施例中，所述邻区覆盖的至少一个区域的位置信息，以及该至少一个区域对应的PLMN的信息和/或AMF的信息可以理解为，指示所述邻区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系的信息。相应的，所述第一指示信息也可以理解为，指示终端设备获取和/或上报邻区覆盖的各个区域与PLMN和/或AMF之间的映射关系的信息。应注意，本申请实施例中，所述邻区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系可以是一对一，也可以是一对多，也可以是多对一，本申请并不限定。
所述邻区覆盖的至少一个区域中的每个区域的位置信息，用于描述该区域所包含的地理范围。在一种可能的实施方式中，一个区域的位置信息可以包括该区域的至少一个经度信息、至少一个纬度信息、至少一个高度信息(如海拔高度信息或相对地平面的高度信息或其他)中的一种或多种，分别用来表示该区域在经度、纬度和高度这三个维度上覆盖的地理范围。在另一种可能的实施方式中，一个区域的位置信息也可以用标识(如ID或index)来表示，其中，区域的标识与该区域的具体位置(即该区域包含的具体地理范围)之间存在着关联或映射关系，且该关联或映射关系可以是系统预定义的，也可以是网络设备通过系统消息或RRC消息或层二消息发送给终端设备的，本申请并不限定。也就是说，网络设备和终端设备均可以根据标识(如ID或index)，确定其对应的区域信息/位置信息。
所述邻区可以是终端设备当前接入的小区的邻接小区，或是终端设备的服务小区的相邻小区。所述终端设备当前接入的小区或终端设备的服务小区均为所述网络设备管辖的小区，即所述终端设备当前接入的小区属于所述网络设备，或者所述终端设备的服务小区属于所述网络设备。应注意，终端设备当前接入的小区与终端设备的服务小区可以是相同的概念，在下文的描述中，将统一采用终端设备当前接入的小区这种表达方式来详细说明本申请的技术方案。
本申请实施例中，所述PLMN的信息可以为PLMN的标识信息，如PLMN-identifier。AMF的信息可以为AMF的标识信息，即AMF-identifier。
需要说明的是，在一种实现方式中，本申请实施例中的第一指示信息可以是小区级(per cell)的，即所述第一指示信息是针对终端设备当前接入的小区的某一个邻区的，用于指示 终端设备获取和/或上报该邻区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系信息。可以理解，所述终端设备当前接入的小区或所述终端设备的服务小区可以具有一个或多个邻区，不同的邻区可以对应不同的第一指示信息。另一种实现方式中，第一指示信息可以是终端设备级(per UE)的，即所述第一指示信息是针对所有能被终端设备检测到的邻区而言的，用于指示终端设备获取和/或上报所有能被终端设备检测到的邻区中的每个邻区所覆盖的至少一个区域与PLMN和/或AMF之间的映射关系信息。可以理解，能被终端设备检测到的邻区中包括一个或多个小区，其中的每个小区均对应该第一指示信息。
本申请在下文中具体以所述一个或多个邻区中的其中一个邻区为例来详细说明本申请的技术方案。
具体的，所述第一消息可以是RRC消息或层二消息或其他消息，本申请并不限定。
所述第一指示信息可以是用二进制数值或是布尔值表示的指示信息，也可以是第一消息中携带的某个信元，或者也可以具有其它的表现形式，本申请并不限定。
举例来说，若该第一指示信息用二进制数值来表示，那么第一指示信息可以是第一消息中占据1比特的一个标志位，当该标志位的取值为“1”时，表示终端设备需要获取和/或上报邻区包括的至少一个区域与PLMN和/或AMF之间的映射关系信息，当该标志位的取值为“0”时，表示终端设备不需要获取和/或上报邻区包括的至少一个区域与PLMN和/或AMF之间的映射关系信息。
若该第一指示信息用布尔值表示，那么该第一指示信息可以是第一消息中的一个布尔类型的标志位，当该标志位的取值为“TRUE”时，可表示终端设备需要获取和/或上报邻区包括的至少一个区域与PLMN和/或AMF之间的映射关系信息，当该标志位的取值为“FALSE”时，表示终端设备不需要获取和/或上报邻区包括的至少一个区域与PLMN和/或AMF之间的映射关系信息。
若该第一指示信息为第一消息中携带的某个信元，那么该第一指示信息可以为第一消息中包含的“AcquireMapping”信元，即当第一消息中包含该“AcquireMapping”信元时，可表示终端设备需要获取和/或上报邻区包括的至少一个区域与PLMN和/或AMF之间的映射关系信息，当第一消息中不包括该“AcquireMapping”信元时，表示终端设备不需要获取和/或上报邻区包括的至少一个区域与PLMN和/或AMF之间的映射关系信息。
可选的，在网络设备向终端设备发送第一消息之前，网络设备还可以向终端设备发送位置测量配置信息，该位置测量配置信息指示终端设备进行位置测量。如此，终端设备可以根据该位置测量配置信息，测量自身所处的位置，并将测量得到的位置信息上报给网络设备。
其中，终端设备测量得到的位置信息即为终端设备对自己所处的位置进行位置测量得到的位置测量结果，所述位置信息可以包括经度信息、纬度信息和高度信息中的一种或多种，或者，所述位置信息可以包括标识(如ID或index)。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。或者，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；或者，该区域范围可以用多个经度值、多个纬度值、多个高度值等参数来表示。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。
可选的，在网络设备向终端设备发送第一消息之前，网络设备还可以向终端设备发送测量配置信息，该信号测量配置信息指示终端设备对邻区的信号质量进行测量。该测量配置信息中可以包括频率信息，用于指示终端设备需要测量的对象或频点。例如，频率信息可以包括同步信号块(synchronization signal block，SSB)和/或参考资源模块的绝对频率位置等。
如此，终端设备可根据该测量配置信息，执行信号质量的测量，检测到一个新的小区(如服务小区的邻区)后，然后将该小区的物理小区标识(physical cell identifier，PCI)、信号质量等上报给网络设备。后续，若网络设备确定终端设备检测到的该小区是一个新的邻区，那么网络设备可以通过上述第一消息，发送用于指示上报该小区的小区全局标识(cell global identifier，CGI)的第二指示信息。该第二指示信息中可以包含PCI值，相应的，该第二指示信息用于指示终端设备上报小区标识为该PCI值的小区的CGI，或者，该第二指示信息中可以包含频率信息，相应的，该第二指示信息用于指示终端设备上报该频率信息对应的小区的CGI。该第二指示信息也可以称为测量任务信息，或CGI测量指示，或具有其他名称，本申请并不限定。
需要说明的是，网络设备可以向终端设备发送位置测量配置信息和/或用于进行信号质量测量的测量配置信息。当网络设备向终端设备发送位置测量配置信息和用于进行信号质量测量的测量配置信息的场景下，所述位置测量配置信息与用于进行信号质量测量的测量配置信息可以在同一条消息中发送，也可以分别在不同的消息中发送，例如可以分别在不同的RRC消息中发送，本申请并不限定。
步骤S802、终端设备根据第一指示信息，获取所述邻区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息。
具体的，终端设备可以根据该第一指示信息的指示，读取该邻区的系统消息，从该邻区的系统消息中获取该邻区包括的至少一个区域的位置信息，以及该至少一个区域对应的PLMN的信息和/或AMF的信息。
步骤S803、终端设备向网络设备发送第二消息，该第二消息中包括所述邻区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息。
也就是说，该第二消息中可以包括用于指示所述邻区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系的信息。需要说明的是，所述至少一个区域对应的PLMN的信息和/或AMF的信息，可以是所述邻区覆盖的所有区域对应的PLMN的信息和/或AMF的信息，也可以是所述邻区覆盖的部分区域对应的PLMN的信息和/或AMF的信息，本申请并不限定。
举例来说，终端设备当前接入的小区存在一个邻区，该邻区覆盖国家A和国家B。假设该邻区中属于国家A的区域记作区域1，属于国家B的区域记作区域2，且国家A对应PLMN1/AMF1，国家B对应PLMN2/AMF2。那么该邻区的系统消息中广播的信息可以包括下列的一项或多项：区域1的位置信息、PLMN1和/或AMF1的标识信息、区域2的位置信息、PLMN2和/或AMF2的标识信息。
如此，终端设备从该邻区的系统消息中获取到的用于指示该邻区覆盖的至少一个区域与PLMN和/或AMF之间的映射关系的信息可以表示为，{区域1的位置信息，PLMN1和/或AMF1的标识信息}，{区域2的位置信息，PLMN2和/或AMF2的标识信息}。进而，终端设备可以通过第二消息将该信息上报给网络设备。
所述第二消息可以是RRC消息或层二消息或其他消息，本申请并不限定。
可选的，该第二消息中还可以包括终端设备测量到的该邻区的CGI。
由此可知，采用该技术方案，终端设备可以进行邻区覆盖的至少一个区域与PLMN/AMF之间的映射关系信息的获取/上报，例如，在自动邻区关系(automatic neighbor relation，ANR)流程中，如此，可使终端设备的服务基站获取相邻基站的上述映射关系后，可以根据该映射关系并结合终端设备的位置信息，对终端设备的切换过程做出合理的切换判决/切换请求，从而使得终端设备的切换/接入可以符合其位置所属的国家/运营商的通信策略要求，避免终端设备从非其位置所属的国家/运营商接入。
请参考图9，为本申请实施例提供的又一种通信方法的流程示意图，该方法包括：
步骤S901、第一网络设备生成第三消息，该第三消息中包括第一网络设备管理的第一小区覆盖的至少一个区域的位置信息，以及该至少一个区域对应的PLMN的信息和/或AMF的信息。
步骤S902、第一网络设备向第二网络设备发送第三消息。相应地，第二网络设备可以接收来自第一网络设备的第三消息。
步骤S903、第二网络设备生成第四消息，该第四消息中包括第二网络设备管理的第二小区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息。
步骤S904、第二网络设备向第一网络设备发送第四消息。相应的，第一网络设备可以接收来自第二网络设备的第四消息。
需要说明的是，本申请对上述步骤S902与步骤S904之间的执行顺序不作具体限定。也就是说，可以是第一网络设备先向第二网络设备发送第三消息，第二网络设备接收到第三消息后，作为对该第三消息的响应，向第一网络设备发送第四消息。或者，也可以是第二网络设备先向第一网络设备发送第四消息，第一网络设备接收到该第四消息后，作为对第四消息的响应，向第二网络设备发送第三消息。
本申请实施例中，所述PLMN的信息可以包括PLMN的标识信息，例如，PLMN-identifier。类似的，所述AMF的信息可以包括AMF的标识信息，例如，AMF-identifier。
在NR系统中，上述第三消息、第四消息可以是XN SETUP REQUEST消息或者XN SETUP RESPONSE消息，或其他消息。在LTE系统中，上述第三消息、第四消息可以是X2 SETUP REQUEST消息或者X2 SETUP RESPONSE消息，或其他消息。
在一种可能的实施方式中，所述第一网络设备和第二网络设备可以是相邻的两个接入网设备，如基站，也可以是相邻的两个接入网设备中的CU。当两个接入网设备之间存在直接连接的接口(如X2/Xn接口)时，它们可以通过该接口交互各自管理的小区覆盖的各个区域与PLMN/AMF之间的映射关系的信息。例如，可以在XN SETUP REQUEST消息、XN SETUP RESPONSE消息中可以包含小区覆盖的各个区域与PLMN/AMF之间的映射关系的信息。关于小区覆盖的各个区域与PLMN/AMF之间的映射关系的信息可参考上文中的描述，在此不再赘述。
例如，小区C属于gNB1，小区C覆盖国家A、国家B，假设小区C中的属于国家A的区域记做区域1，小区C中的属于国家B的区域记做区域2，且假设国家A对应PLMN1/AMF1，国家B对应PLMN2/AMF2。小区D属于gNB2，小区D覆盖国家B、国 家C，假设小区D中的属于国家B的区域记做区域3，小区D中的属于国家C的区域记做区域4，且假设国家B对应PLMN2/AMF2，国家C对应PLMN3/AMF3。
那么，以NR系统为例，gNB1(或gNB1-CU)向gNB2(或gNB2-CU)发送的XN SETUP REQUEST消息中可以包含小区C覆盖的各个区域与PLMN/AMF之间的映射关系的信息，如{区域1的位置信息，PLMN1和/或AMF1的标识信息}、{区域2的位置信息，PLMN2和/或AMF2的标识信息}。相应的，gNB2(或gNB2-CU)向gNB1(或gNB1-CU)发送的XN SETUP RESPONSE消息中可以包含小区D覆盖的各个区域与PLMN/AMF之间的映射关系的信息，如{区域3的位置信息，PLMN2和/或AMF2的标识信息}、{区域4的位置信息，PLMN3和/或AMF3的标识信息}。
或者，gNB2(或gNB2-CU)向gNB1(或gNB1-CU)发送的XN SETUP REQUEST消息中可以包含小区D覆盖的各个区域与PLMN/AMF之间的映射关系的信息，如{区域3的位置信息，PLMN2和/或AMF2的标识信息}、{区域4的位置信息，PLMN3和/或AMF3的标识信息}。相应的，gNB1(或gNB1-CU)向gNB2(或gNB2-CU)发送的XN SETUP RESPONSE消息中可以包含小区C覆盖的各个区域与PLMN/AMF之间的映射关系的信息，如{区域1的位置信息，PLMN1和/或AMF1的标识信息}、{区域2的位置信息，PLMN2和/或AMF2的标识信息}。
进一步地，考虑到接入网设备采用的CU-DU架构，在另一种可能的实施方式中，所述第一网络设备和第二网络设备还可以是同一个接入网设备内部的CU节点和DU节点。即，某一接入网设备的CU节点可以向该接入网设备的DU节点发送属于该接入网设备的小区覆盖的至少一个区域与PLMN/AMF之间的映射关系的信息，和/或，该接入网设备的DU节点也可以向该接入网设备的CU节点发送属于该接入网设备的小区覆盖的至少一个区域与PLMN/AMF之间的映射关系的信息。
例如，gNB-DU向gNB-CU发送的F1 SETUP REQUEST消息、gNB-CU向gNB-DU发送的F1 SETUP RESPONSE消息、gNB-CU向gNB-DU发送的F1 SETUP FAILURE消息、gNB-CU向gNB-DU发送的UE CONTEXT SETUP REQUEST消息、gNB-DU向gNB-CU发送的UE CONTEXT SETUP RESPONSE消息、gNB-DU向gNB-CU发送的GNB-DU CONFIGURATION UPDATE消息、gNB-CU向gNB-DU发送的GNB-DU CONFIGURATION UPDATE ACKNOWLEDGE消息、gNB-CU向gNB-DU发送的GNB-DU CONFIGURATION UPDATE FAILURE消息、gNB-CU向gNB-DU发送的GNB-CU CONFIGURATION UPDATE消息、gNB-DU向gNB-CU发送的GNB-CU CONFIGURATION UPDATE ACKNOWLEDGE消息、gNB-DU向gNB-CU发送的GNB-CU CONFIGURATION UPDATE FAILURE消息等，中可以包含小区覆盖的至少一个区域与PLMN/AMF之间的映射关系的信息。
更进一步地，若接入网设备中的CU节点可以划分为CU-CP和CU-UP，则在又一种可能的实施方式中，所述第一网络设备和第二网络设备还可以是CU节点的CU-CP部分和CU-UP部分。即，接入网设备内部的CU节点的CU-CP可以向该CU节点的CU-UP发送小区覆盖的至少一个区域与PLMN/AMF之间的映射关系的信息，和/或，该CU节点的CU-UP可以向该CU节点的CU-CP发送小区覆盖的至少一个区域与PLMN/AMF之间的映射关系的信息。
例如，gNB-CU-UP向gNB-CU-CP发送的GNB-CU-UP E1 SETUP REQUEST消息、gNB-CU-CP向gNB-CU-UP发送的GNB-CU-UP E1 SETUP RESPONSE消息、gNB-CU-CP 向gNB-CU-UP发送的GNB-CU-UP E1 SETUP FAILURE消息、gNB-CU-CP向gNB-CU-UP发送的GNB-CU-CP E1 SETUP REQUEST消息、gNB-CU-UP向gNB-CU-CP发送的GNB-CU-CP E1 SETUP RESPONSE消息、gNB-CU-UP向gNB-CU-CP发送的GNB-CU-CP E1 SETUP FAILURE消息、gNB-CU-UP向gNB-CU-CP发送的GNB-CU-UP CONFIGURATION UPDATE消息、gNB-CU-CP向gNB-CU-UP发送的GNB-CU-UP CONFIGURATION UPDATE ACKNOWLEDGE消息、gNB-CU-CP向gNB-CU-UP发送的GNB-CU-UP CONFIGURATION UPDATE FAILURE消息、gNB-CU-CP向gNB-CU-UP发送的GNB-CU-CP CONFIGURATION UPDATE消息、gNB-CU-UP向gNB-CU-CP发送的GNB-CU-CP CONFIGURATION UPDATE ACKNOWLEDGE消息、gNB-CU-UP向gNB-CU-CP发送的GNB-CU-CP CONFIGURATION UPDATE FAILURE消息等，中可以包含小区覆盖的至少一个区域与PLMN/AMF之间的映射关系的信息。
由此可知，本申请实施例中，通过引入节点间交互小区覆盖的至少一个区域与PLMN/AMF之间的映射关系的信息的机制，使得节点获取上述映射关系后，可以基于该映射关系，在后续需要进行例如接入控制或切换判决时或是在其他场景中可以做出合理的决策，从而使得终端设备的接入/切换可以符合其位置所属的国家/运营商的通信策略要求，避免终端设备从非其位置所属的国家/运营商接入。
本申请实施例还提供一种通信装置，请参考图10，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1000包括：收发模块1010和处理模块1020。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目标网络设备)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目标网络设备的操作或者步骤时，收发模块1010用于，来自源网络设备的切换请求消息，该切换请求消息用于请求将终端设备切换到目标网络设备，该切换请求消息中包括终端设备的位置信息，以及终端设备在与源网络设备通信时源网络设备所属的第一公共陆地移动网络PLMN或源网络设备连接的第一接入与移动性管理功能AMF的信息；处理模块1020用于，根据终端设备的位置信息，确定终端设备所处的位置位于目标小区覆盖的第一区域内，且该第一区域对应的PLMN中不包括第一PLMN，或者第一区域对应的AMF中不包括第一AMF，其中，目标网络设备管理目标小区；收发模块1010还用于，向源网络设备发送切换失败消息。
在一种可能的设计中，所述切换失败消息中包括下列信息中的一项或多项：失败原因信息、目标网络设备允许终端设备接入的PLMN的信息、目标网络设备允许终端设备接入的AMF的信息；其中，失败原因信息用于指示切换失败原因为无效的PLMN，或者无效的AMF，或者无效的位置信息，或者非法请求。
在一种可能的设计中，所述切换失败消息中包括目标小区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应PLMN的信息和/或AMF的信息。
当该通信装置执行图3中所示的方法实施例中对应源网络设备的操作或步骤时，收发模块1010用于，向目标网络设备发送切换请求消息，该切换请求消息用于请求将终端设备切换到目标网络设备，该切换请求消息中包括终端设备的位置信息，以及终端设备在与源网络设备通信时源网络设备所属的第一公共陆地移动网络PLMN的信息或源网络设备连接的第一接入与移动性管理功能AMF的信息；收发模块1010还用于，接收来自目标网 络设备的切换失败消息。
在一种可能的设计中，所述切换失败消息中包括下列信息中的一项或多项：失败原因信息、目标网络设备允许终端设备接入的PLMN的信息、目标网络设备允许终端设备接入的AMF的信息；其中，所述失败原因信息用于指示切换失败原因为无效的PLMN，或者无效的AMF，或者无效的位置信息，或者非法请求。
在一种可能的设计中，所述切换失败消息中包括所述目标小区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应PLMN的信息和/或AMF的信息。
在一种可能的设计中，收发模块1010还用于，向终端设备发送位置测量配置信息，该位置测量配置信息指示终端设备进行位置测量；处理模块1020用于，获取终端设备的位置信息。
当该通信装置执行图7中所示的方法实施例中对应源网络设备的操作或步骤时，收发模块1010用于，获取终端设备的位置信息；处理模块1020用于，根据终端设备的位置信息，确定终端设备位于目标小区覆盖的第一区域内，且目标小区覆盖的第一区域对应第二公共陆地移动网络PLMN或第二接入与移动性管理功能AMF；收发模块1010还用于，向目标网络设备发送切换请求消息，该切换请求消息用于请求将终端设备切换到目标网络设备，该切换请求消息中包括第一信息，该第一信息指示请求接入的PLMN为第二PLMN或者请求接入的AMF为第二AMF；收发模块1010还用于，接收来自目标网络设备的切换请求确认消息。
在一种可能的设计中，收发模块1010还用于，向终端设备发送第一消息，该第一消息中包括第一指示信息，该第一指示信息指示终端设备上报目标小区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息；收发模块1010还用于，接收来自终端设备的第二消息，该第二消息中包括目标小区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息。
在一种可能的设计中，收发模块1010还用于，接收来自目标网络设备的第三消息，该第三消息中包括目标小区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息。
当该通信装置执行图8中所示的方法实施例中对应网络设备的操作或步骤时，收发模块1010用于，向终端设备发送第一消息，该第一消息中包括第一指示信息，该第一指示信息指示终端设备上报邻区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的公共陆地移动网络PLMN的信息和/或接入与移动性管理功能AMF的信息；收发模块1010还用于，接收来自终端设备的第二消息，该第二消息中包括所述邻区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息。
在一种可能的设计中，收发模块1010还用于，向终端设备发送位置测量配置信息，该位置测量配置信息指示终端设备进行位置测量；网络设备接收终端设备发送的位置信息。
在一种可能的设计中，该第一消息中还包括第二指示信息，该第二指示信息指示终端设备上报所述邻区的小区全局标识CGI。
当该通信装置执行图9中所示的方法实施例中对应第一网络设备的操作或步骤时，处理模块1020用于，生成第三消息，该第三消息中包括第一网络设备管理的第一小区覆盖的至少一个区域的位置信息，以及所述第一小区覆盖的至少一个区域对应的公共陆地移动网络PLMN的信息和/或接入与移动性管理功能AMF的信息；收发模块1010用于，向第 二网络设备发送该第三消息。
在一种可能的设计中，收发模块1010还用于，接收来自第二网络设备的第四消息，该第四消息中包括第二网络设备管理的第二小区覆盖的至少一个区域的位置信息，以及所述第二小区覆盖的至少一个区域对应的PLMN的信息和/或AMF的信息。
应理解，该通信装置中涉及的处理模块1020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1010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、图7、图8或图9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1010和/或处理模块1020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11，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目标网络设备)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)1101和一个或多个基带单元(baseband unit，BBU)(也可称为数字单元，digital unit，DU)1102。所述RRU 1101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11011和射频单元11012。所述RRU 1101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 1102部分主要用于进行基带处理，对基站进行控制等。所述RRU 1101与BBU 1102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 1102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)1102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 1102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 1102还可以包括存储器11021和处理器11022，所述存储器11021用于存储必要的指令和数据。所述处理器11022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11021和处理器11022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12，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1200包括：收发模块1210和处理模块1220。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8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1210用于，接收来自网络设备的第一消息，该第一消息中包括第一指示信息，该第一指示信息指示终端设备上报邻区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的公共陆地移动网络PLMN的信息和/或接入与移动性管理功能AMF的信息；处理模块1220用于，根据第一指示信息，获取所述邻区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息；收发模块1210还用于，向网络设备发送第二消息，该第二消息中包括所述邻区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息。
在一种可能的设计中，收发模块1210还用于，接收来自网络设备的位置测量配置信息，该位置测量配置信息指示终端设备进行位置测量；处理模块1220还用于，根据所述位置测量配置的指示进行位置测量；收发模块1210还用于，向网络设备发送测量到的终端设备的位置信息。
在一种可能的设计中，所述第一消息中还包括第二指示信息，该第二指示信息指示终端设备上报所述邻区的小区全局标识CGI。
该通信装置中涉及的处理模块1220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1210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1210和/或处理模块1220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13，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13中，终端设备以手机作为例子。如图13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13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13所示，终端设备包括收发单元1310和处理单元1320。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1310中用于实现接收功能的器件视为接收单元，将收发单元1310中用于实现发送功能的器件视为发送单元，即收发单元1310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1310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1320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，该通信系统包括至少一个网络设备和至少一个终端设备，所述至少一个网络设备可以包括源网络设备和目标网络设备，也可以包括第一网络设备和第二网络设备。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 (23)

  1. 一种通信方法，其特征在于，所述方法包括：
    目标网络设备接收来自源网络设备的切换请求消息，所述切换请求消息用于请求将终端设备切换到所述目标网络设备，所述切换请求消息中包括所述终端设备的位置信息，以及所述终端设备在与所述源网络设备通信时所述源网络设备所属的第一公共陆地移动网络PLMN的信息或所述源网络设备连接的第一接入与移动性管理功能AMF的信息；
    所述目标网络设备根据所述终端设备的位置信息，确定所述终端设备所处的位置位于目标小区覆盖的第一区域内，且所述第一区域对应的PLMN中不包括所述第一PLMN，或者所述第一区域对应的AMF中不包括所述第一AMF；其中，所述目标网络设备管理所述目标小区；
    所述目标网络设备向所述源网络设备发送切换失败消息。
  2. 根据权利要求1所述的方法，其特征在于，所述切换失败消息中包括下列信息中的一项或多项：失败原因信息、所述目标网络设备允许所述终端设备接入的PLMN的信息、所述目标网络设备允许所述终端设备接入的AMF的信息；
    其中，所述失败原因信息用于指示切换失败原因为无效的PLMN，或者无效的AMF，或者无效的位置信息，或者非法请求。
  3. 根据权利要求1或2所述的方法，其特征在于，所述切换失败消息中包括所述目标小区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应PLMN的信息和/或AMF的信息。
  4. 一种通信方法，其特征在于，所述方法包括：
    源网络设备向目标网络设备发送切换请求消息，所述切换请求消息用于请求将终端设备切换到所述目标网络设备，所述切换请求消息中包括所述终端设备的位置信息，以及所述终端设备在与所述源网络设备通信时所述源网络设备所属的第一公共陆地移动网络PLMN的信息或所述源网络设备连接的第一接入与移动性管理功能AMF的信息；
    所述源网络设备接收来自所述目标网络设备的切换失败消息。
  5. 根据权利要求4所述的方法，其特征在于，所述切换失败消息中包括下列信息中的一项或多项：失败原因信息、所述目标网络设备允许所述终端设备接入的PLMN的信息、所述目标网络设备允许所述终端设备接入的AMF的信息；
    其中，所述失败原因信息用于指示切换失败原因为无效的PLMN，或者无效的AMF，或者无效的位置信息，或者非法请求。
  6. 根据权利要求4或5所述的方法，其特征在于，所述切换失败消息中包括所述目标小区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应PLMN的信息和/或AMF的信息。
  7. 根据权利要求4至6中任一项所述的方法，其特征在于，所述方法还包括：
    所述源网络设备向所述终端设备发送位置测量配置信息，所述位置测量配置信息指示所述终端设备进行位置测量；
    所述源网络设备获取所述终端设备的位置信息。
  8. 一种通信方法，其特征在于，所述方法包括：
    源网络设备获取终端设备的位置信息；
    所述源网络设备根据所述终端设备的位置信息，确定所述终端设备位于目标小区覆盖的第一区域内，且所述目标小区覆盖的第一区域对应第二公共陆地移动网络PLMN或第二接入与移动性管理功能AMF；
    所述源网络设备向所述目标网络设备发送切换请求消息，所述切换请求消息用于请求将终端设备切换到所述目标网络设备，所述切换请求消息中包括第一信息，所述第一信息指示请求接入的PLMN为第二PLMN或者请求连接的AMF为第二AMF；
    所述源网络设备接收来自所述目标网络设备的切换请求确认消息。
  9. 根据权利要求8所述的方法，其特征在于，所述方法还包括：
    所述源网络设备向所述终端设备发送第一消息，所述第一消息中包括第一指示信息，所述第一指示信息指示所述终端设备上报所述目标小区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息；
    所述源网络设备接收来自所述终端设备的第二消息，所述第二消息中包括所述目标小区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息。
  10. 根据权利要求8所述的方法，其特征在于，所述方法还包括：
    所述源网络设备接收来自所述目标网络设备的第三消息，所述第三消息中包括所述目标小区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息。
  11. 一种通信方法，其特征在于，所述方法包括：
    终端设备接收来自网络设备的第一消息，所述第一消息中包括第一指示信息，所述第一指示信息指示所述终端设备上报邻区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的公共陆地移动网络PLMN的信息和/或接入与移动性管理功能AMF的信息；
    所述终端设备根据所述第一指示信息，获取所述邻区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息；
    所述终端设备向所述网络设备发送第二消息，所述第二消息中包括所述邻区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息。
  12. 根据权利要求11所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收来自所述网络设备的位置测量配置信息，所述位置测量配置信息指示所述终端设备进行位置测量；
    所述终端设备向所述网络设备发送所述终端设备的位置信息。
  13. 根据权利要求11或12所述的方法，其特征在于，所述第一消息中还包括第二指示信息，所述第二指示信息指示所述终端设备上报所述邻区的小区全局标识CGI。
  14. 一种通信方法，其特征在于，所述方法包括：
    网络设备向终端设备发送第一消息，所述第一消息中包括第一指示信息，所述第一指示信息指示所述终端设备上报邻区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的公共陆地移动网络PLMN的信息和/或接入与移动性管理功能AMF的信息；
    所述网络设备接收来自所述终端设备的第二消息，所述第二消息中包括所述邻区覆盖的至少一个区域的位置信息，以及所述至少一个区域对应的PLMN的信息和/或AMF的信息。
  15. 根据权利要求14所述的方法，其特征在于，所述方法还包括：
    所述网络设备向所述终端设备发送位置测量配置信息，所述位置测量配置信息指示所述终端设备进行位置测量；
    所述网络设备接收所述终端设备发送的位置信息。
  16. 根据权利要求14或15所述的方法，其特征在于，所述第一消息中还包括第二指示信息，所述第二指示信息指示所述终端设备上报所述邻区的小区全局标识CGI。
  17. 一种通信方法，其特征在于，所述方法包括：
    第一网络设备生成第三消息，所述第三消息中包括所述第一网络设备管理的第一小区覆盖的至少一个区域的位置信息，以及所述第一小区覆盖的至少一个区域对应的公共陆地移动网络PLMN的信息和/或接入与移动性管理功能AMF的信息；
    所述第一网络设备向第二网络设备发送所述第三消息。
  18. 根据权利要求17所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备接收来自所述第二网络设备的第四消息，所述第四消息中包括所述第二网络设备管理的第二小区覆盖的至少一个区域的位置信息，以及所述第二小区覆盖的至少一个区域对应的PLMN的信息和/或AMF的信息。
  19. 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3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4至7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8至10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11至13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14至16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17或18所述的方法的各步骤的单元。
  20. 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3中任一项所述的方法，或者使得所述装置执行如权利要求4至7中任一项所述的方法，或者使得所述装置执行如权利要求8至10中任一项所述的方法，或者使得所述装置执行如权利要求11至13中任一项所述的方法，或者使得所述装置执行如权利要求14至16中任一项所述的方法，或者使得所述装置执行如权利要求17或18所述的方法。
  21. 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3中任一项所述的方法被实现，或者使如权利要求4至7中任一项所述的方法被实现，或者使如权利要求8至10中任一项所述的方法被实现，或者使如权利要求11至13中任一项所述的方法被实现，或者使如权利要求14至16中任一项所述的方法被实现，或者使如权利要求17或18所述的方法被实现。
  22. 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3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4至7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8至10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11至13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14至16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17或18所述的方法。
  23. 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3中任一项所述的方法，或者执行如权利要求4至7中任一项所述的方法，或者执行如权利要求8至10中任一项所述的方法，或者执行如权利要求11至13中任一项所述的方法，或者执行如权利要求14至16中任一项所述的方法，或者执行如权利要求17或18所述的方法。
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CN109151924A (zh) * 2017-06-16 2019-01-04 华为技术有限公司 通信方法及接入网设备、核心网设备
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