WO2024032537A1 - 通信方法、设备及可读存储介质 - Google Patents

通信方法、设备及可读存储介质 Download PDF

Info

Publication number
WO2024032537A1
WO2024032537A1 PCT/CN2023/111424 CN2023111424W WO2024032537A1 WO 2024032537 A1 WO2024032537 A1 WO 2024032537A1 CN 2023111424 W CN2023111424 W CN 2023111424W WO 2024032537 A1 WO2024032537 A1 WO 2024032537A1
Authority
WO
WIPO (PCT)
Prior art keywords
message
terminal
plmn
network device
access network
Prior art date
Application number
PCT/CN2023/111424
Other languages
English (en)
French (fr)
Inventor
程思涵
张奕忠
康艳超
Original Assignee
维沃移动通信有限公司
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.)
Filing date
Publication date
Application filed by 维沃移动通信有限公司 filed Critical 维沃移动通信有限公司
Publication of WO2024032537A1 publication Critical patent/WO2024032537A1/zh

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/50—Connection management for emergency connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/12—Mobility data transfer between location registers or mobility servers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities

Definitions

  • This application belongs to the field of communication technology, and specifically relates to a communication method, equipment and readable storage medium.
  • Multi-Operator Core Network refers to a set of wireless networks shared by multiple operators, that is, the same base station can be connected to the Core Network (Core Network) of multiple operators (Operator, Op) at the same time. ,CN). Each operator shares wireless network resources (cell carrier frequency) but does not share CN nodes, which belong to different operators.
  • Radio Access Network (RAN) nodes broadcast supported Public Land Mobile Network (PLMN) information, such as PLMN ID, through system broadcast messages.
  • PLMN Public Land Mobile Network
  • the terminal User Equipment, UE
  • PLMN ID Public Land Mobile Network
  • the terminal When the terminal (User Equipment, UE) initiates RRC connection establishment to the RAN, it will provide the RAN with information about which operator to access, such as the PLMN ID of the target operator; the RAN routes the UE's request to the corresponding operator based on this information. core network.
  • PLMN Public Land Mobile Network
  • Embodiments of the present application provide a communication method, device and readable storage medium, which can solve the problem that in the MOCN scenario, when the core network of the operator that provides services for the UE fails, the UE will be unable to continue normal communication services. .
  • a communication method including:
  • the terminal receives a first message from the access network device, where the first message contains information about one or more first PLMNs that provide disaster roaming services;
  • the terminal When the terminal determines that DC occurs in the PLMN that provides services to the terminal based on the first message, the terminal sends a second message to the access network device, where the second message is used to request one or A target PLMN among the plurality of first PLMNs provides services for the terminal.
  • the second aspect provides a communication method, including:
  • the access network device sends a first message, where the first message includes information about one or more first PLMNs that provide disaster roaming services;
  • the access network device receives a second message sent by the terminal.
  • the second message is used to request a target PLMN to provide services for the terminal.
  • the target PLMN is one of the one or more first PLMNs.
  • a communication method including:
  • the core network device receives a third message from the access network device.
  • the third message is used by the core network device to determine to send a first NAS message to the access network device.
  • the first NAS message includes providing a disaster roaming service.
  • the core network device is a network device of one or more target PLMNs in the first PLMN.
  • a communication device including:
  • a first receiving module configured to receive a first message from the access network device, where the first message contains information about one or more first PLMNs that provide disaster roaming services;
  • a first sending module configured to send a second message to the access network device when it is determined according to the first message that a DC occurs in the PLMN that provides services to the communication device, where the second message is used to request A target PLMN in one or more first PLMNs provides services for the communication device.
  • a communication device including:
  • a second sending module configured to send a first message, where the first message contains information about one or more first PLMNs that provide disaster roaming services;
  • the second receiving module is configured to receive a second message sent by the terminal.
  • the second message is used to request a target PLMN to provide services for the terminal.
  • the target PLMN is one of the one or more first PLMNs.
  • a communication device including:
  • the third receiving module is configured to receive a third message from the access network device, where the third message is used to determine to send a first NAS message to the access network device, where the first NAS message includes information about providing disaster roaming services.
  • the communication device is a network device of one or more target PLMNs in the first PLMN.
  • a terminal in a seventh aspect, includes a processor and a memory.
  • the memory stores programs or instructions that can be run on the processor.
  • the program or instructions When the program or instructions are executed by the processor, the following implementations are implemented: The steps of the method described in one aspect.
  • a terminal including a processor and a communication interface, wherein the communication interface is used for the terminal to receive a first message from an access network device, where the first message includes one or more devices providing disaster roaming services.
  • the terminal When the terminal determines that DC occurs in the PLMN that provides services to the terminal based on the first message, the terminal sends a second message to the access network device, where the second message is used to request one or A target PLMN among the plurality of first PLMNs provides services for the terminal.
  • a network device in a ninth aspect, includes a processor and a memory, and the memory stores A program or instructions that can be run on the processor, and when executed by the processor, implement the steps of the method described in the second aspect or the third aspect.
  • a network device including a processor and a communication interface
  • the communication interface is used by the access network device to send a first message, where the first message contains information about one or more first PLMNs that provide disaster roaming services;
  • the access network device receives a second message sent by the terminal.
  • the second message is used to request a target PLMN to provide services for the terminal.
  • the target PLMN is one of the one or more first PLMNs.
  • the core network device receives a third message from the access network device, and the third message is used by the core network device to determine to send the first NAS to the access network device.
  • the first NAS message contains information about one or more first PLMNs that provide disaster roaming services;
  • the core network device is a network device of one or more target PLMNs in the first PLMN.
  • a communication system including: a terminal, an access network device and a core network device.
  • the terminal can be used to perform the steps of the communication method as described in the first aspect.
  • the access network device can In order to perform the steps of the communication method as described in the second aspect, the core network device may be used to perform the steps of the communication method as described in the third aspect.
  • a readable storage medium In a twelfth aspect, a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method are implemented. The steps of the method as described in the second aspect, or the steps of implementing the method as described in the third aspect.
  • a chip in a thirteenth aspect, includes a processor and a communication interface.
  • the communication interface is coupled to the processor.
  • the processor is used to run programs or instructions to implement the method described in the first aspect. The steps of the method, or the steps of implementing the method as described in the second aspect, or the steps of implementing the method as described in the third aspect.
  • a computer program/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement as described in the first aspect
  • the access network device sends a first message to the terminal, which contains information about one or more first PLMNs that provide disaster roaming services.
  • the terminal determines that DC occurs in the PLMN that provides services to itself based on the first message.
  • the terminal sends a second message to the access network device, and requests through the second message that the target PLMN in one or more first PLMNs that provide disaster roaming services provide services for the terminal.
  • the PLMN that provides services for the terminal can be replaced, allowing the UE to continue normal communication services.
  • Figure 1 is a block diagram of a wireless communication system applicable to the embodiment of the present application.
  • FIG. 2 is one of the flow diagrams of the communication method provided by the embodiment of the present application.
  • FIG. 3 is a second schematic flowchart of the communication method provided by the embodiment of the present application.
  • Figure 4 is a third schematic flowchart of the communication method provided by the embodiment of the present application.
  • Figure 5a is a schematic diagram of an application scenario provided by an embodiment of the present application.
  • Figure 5b is one of the flow diagrams of the application embodiment provided by the embodiment of this application.
  • Figure 5c is the second schematic flow diagram of the application embodiment provided by the embodiment of this application.
  • Figure 5d is the third schematic flow diagram of the application embodiment provided by the embodiment of this application.
  • Figure 6 is one of the structural schematic diagrams of a communication device provided by an embodiment of the present application.
  • Figure 7 is a second structural schematic diagram of a communication device provided by an embodiment of the present application.
  • Figure 8 is a third schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Figure 9 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Figure 10 is a schematic structural diagram of a terminal provided by an embodiment of the present application.
  • Figure 11 is one of the structural schematic diagrams of the network equipment provided by the embodiment of the present application.
  • Figure 12 is a second schematic structural diagram of a network device provided by an embodiment of the present application.
  • first, second, etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first" and “second” are distinguished objects It is usually one type, and the number of objects is not limited.
  • the first object can be one or multiple.
  • “and/or” in the description and claims indicates at least one of the connected objects, and the character “/" generally indicates that the related objects are in an "or” relationship.
  • LTE Long Term Evolution
  • LTE-Advanced, LTE-A Long Term Evolution
  • LTE-A Long Term Evolution
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single-carrier Frequency Division Multiple Access
  • NR New Radio
  • FIG. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable.
  • the wireless communication system includes a terminal 11 and a network device 12.
  • the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop Laptop Computer is also known as notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile Internet device (Mobile Internet Device, MID), augmented reality (AR)/virtual reality (VR) equipment, robots, wearable devices (Wearable Devices), vehicle user equipment (VUE), pedestrian terminals (Pedestrian User Equipment, PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), terminal-side devices such as game consoles, personal computers (PC), teller machines or self-service machines, and wearable devices Including: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart
  • the network device 12 may include an access network device or a core network device, where the access network device may also be called a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a radio access network device.
  • Access network equipment may include base stations, WLAN access points, or WiFi nodes.
  • the base station may be called a Node B, an Evolved Node B (eNB), an access point, or a Base Transceiver Station (BTS).
  • eNB Evolved Node B
  • BTS Base Transceiver Station
  • radio base station radio transceiver
  • BSS Basic Service Set
  • ESS Extended Service Set
  • home B-node home evolved B-node
  • TRP Transmitting Receiving Point
  • the base station is not limited to specific technical terms. It should be noted that in the embodiment of this application, only the base station in the NR system is used as an example. Introduction, does not limit the specific type of base station.
  • FIG. 1 For simplicity and clarity, only one core network equipment diagram corresponding to one operator's core network is drawn, that is, Figure 1 can be understood as showing a wireless communication system including the core networks of two operators.
  • the embodiments of this application are also applicable to the scenario of a core network containing a larger number of operators.
  • Core network equipment may include but is not limited to at least one of the following: core network nodes, core network functions, mobility management entities (Mobility Management Entity, MME), access mobility management functions (Access and Mobility Management Function, AMF), session management functions (Session Management Function, SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Service Discovery function (Edge Application Server Discovery Function, EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), centralized network configuration ( Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (Local NEF, or L-NEF), Binding Support Function (Binding Support Function, BSF), application function (Application Function, AF), etc.
  • MME mobility management entities
  • AMF Access and Mobility Management Function
  • SMF Session Management Function
  • UPF User Plane Function
  • PCF Policy Control Function
  • an embodiment of the present application provides a communication method.
  • the execution subject of the method is a terminal.
  • the method includes:
  • Step 201 The terminal receives a first message from the access network device, where the first message contains information about one or more first PLMNs that provide disaster roaming services;
  • the DC here can also be understood as the Core Network DC, that is, user services are unavailable due to core network failure or damage.
  • Step 202 When the terminal determines that DC occurs in the PLMN that provides services to the terminal according to the first message, the terminal sends a second message to the access network device.
  • the second message is used to request the target PLMN in one or more first PLMNs.
  • the PLMN that provides services for the terminal can also be understood as: the terminal is currently registered in the PLMN.
  • the access network device sends a first message to the terminal, which contains information about one or more first PLMNs that provide disaster roaming services.
  • the terminal determines that DC occurs in the PLMN that provides services to itself based on the first message.
  • the terminal sends a second message to the access network device, and requests through the second message that the target PLMN in one or more first PLMNs that provide disaster roaming services provide services for the terminal.
  • the PLMN that provides services for the terminal can be changed, so that the UE can continue to perform normal communication services.
  • the above-mentioned access network device may be a base station to which the terminal accesses.
  • PLMNs correspond to different operators.
  • the terminal By informing the terminal which PLMNs are subject to DC and which PLMNs provide disaster roaming services, it is convenient for the terminal to subsequently change the PLMN that provides services, that is, change to other operators.
  • the above target PLMN is a PLMN selected from one or more first PLMNs. Although there can be multiple PLMNs that can provide disaster roaming services, there can only be one PLMN that ultimately provides services to the terminal. Therefore, A target PLMN needs to be selected from one or more first PLMNs. The selection of a specific target PLMN may be performed by the terminal or by the access network device.
  • the first message also contains information about one or more second PLMNs where the DC occurs.
  • the access network device can provide the information of the second PLMN where DC occurs to the terminal, so that the terminal determines whether the PLMN that provides services to itself has DC based on the information of the second PLMN.
  • the terminal determines that a DC occurs in the PLMN that provides services to the terminal, including:
  • the terminal determines, based on the information of the first PLMN, that the DC occurs in the PLMN that provides services to the terminal.
  • the access network equipment only sends the information of one or more first PLMNs that provide disaster roaming services to the terminal.
  • the terminal receives the information of the first PLMN, it can learn that DC occurs in the PLMN that provides services to itself at this time, that is, through
  • the method of sending information about one or more first PLMNs that provide disaster roaming services simultaneously informs the terminal of the occurrence of a DC in the PLMN that provides services for itself, as well as information about the PLMN that can provide disaster roaming services.
  • the first message further includes first indication information, and the first indication information is used to indicate DC occurs in a PLMN that provides services for the terminal.
  • the access network device directly notifies the terminal of the occurrence of DC in the PLMN that provides services to the terminal by indicating the first indication information.
  • the information of the second PLMN where DC occurs and the information of the first PLMN that provides disaster roaming services can be specifically determined by the access network device.
  • the access network device learns the second PLMN according to instructions from the core network side.
  • the information of the PLMN and the information of the first PLMN, or the information of the second PLMN and the information of the first PLMN are obtained through some other methods.
  • the embodiment of this application allows the access network device to obtain the information of the second PLMN and the information of the first PLMN. The method is not specifically limited.
  • the information about the second PLMN includes the identity of the second PLMN
  • the information about the first PLMN includes the identity of the first PLMN
  • the identifier of the PLMN may be a PLMN ID.
  • the access network device uses the PLMN ID to enable the terminal to learn the PLMN where DC currently occurs and the PLMN that provides disaster roaming services.
  • the first message is a system broadcast message.
  • the access network device sends a system broadcast message.
  • RRC Radio Resource Control
  • system broadcast message is composed of multiple system information blocks (System Information Block, SIB).
  • SIB System Information Block
  • the information of the PLMN where DC occurs and the information of the PLMN that provides disaster roaming services can be carried in the same or different parts of the system broadcast message. in the SIB.
  • the method before the terminal receives the first message from the access network device, the method further includes:
  • the terminal receives the paging message from the access network device.
  • the paging message is used to instruct the terminal to receive the system broadcast message. It can be understood that since the access network equipment needs to tell the terminal the information of the PLMN where the DC occurs and the information of the PLMN that provides disaster roaming services through the system broadcast message, it is equivalent to the system broadcast message changing, so the access network equipment sends the search message.
  • the paging message instructs the terminal to receive the system broadcast message through the paging message, so as to obtain the information of the PLMN where DC occurs and the information of the PLMN that provides disaster roaming services.
  • the terminal receiving the system broadcast message can be understood as the terminal receiving and reading the system broadcast message.
  • the terminal sends a second message to the access network device, including:
  • the terminal sends a registration request message to the access network device.
  • the terminal sends a registration request message to the access network device to request the target PLMN in one or more first PLMNs to register. Therefore, the terminal can continue to obtain services in the target PLMN.
  • the first message is an RRC message.
  • the access network device can provide the terminal with the information of the PLMN where DC occurs through the RRC message, and provide disaster roaming services.
  • PLMN information that is, by enhancing the RRC message, the RRC message carries the information of the PLMN where DC occurs and the information of the PLMN that provides disaster roaming services.
  • the terminal can use the existing RRC connection to directly send a registration message to the target PLMN, which avoids the process of the terminal re-searching the network and reestablishing the RRC connection with the access network device, shortening the user service interruption time, and improving the user experience.
  • the terminal receives the first message from the access network device, including:
  • the terminal When the terminal is in a connected state, the terminal receives the first message from the access network device;
  • the terminal sends a second message to the access network device, including:
  • the terminal sends the second message to the access network device through the RRC connection with the access network device.
  • the terminal since the terminal is in the connected state and there is an RRC connection between the terminal and the access network device, the terminal can directly use the existing RRC connection to send the second message to the access network device.
  • the method further includes:
  • the terminal establishes an RRC connection with the access network equipment
  • the terminal sends a Non-access stratum (NAS) message to the PLMN that provides services to the terminal through the RRC connection.
  • NAS Non-access stratum
  • the terminal can first establish an RRC connection with the access network device, and then send a NAS message to the PLMN that provides services for the terminal through the established RRC connection.
  • the PLMN that provides services to the terminal refers to the PLMN that the terminal has previously registered to use.
  • the PLMN may experience DC at this time and is no longer able to provide services to the terminal, since the terminal does not know that the PLMN has experienced DC, therefore The terminal will still send a NAS message to the PLMN that provides services to the terminal.
  • the NAS message carries information about the PLMN that provides services to the terminal, such as a PLMN ID.
  • the NAS message may be a service request (Service request) message or a registration (registration) message.
  • the RRC message includes one or more of the following:
  • the above RRC message can be enhanced, and the RRC message carries the information of the PLMN where DC occurs and the information of the PLMN that provides disaster roaming services.
  • the terminal determines, according to the first message, that the DC occurs in the PLMN that provides services to the terminal, including:
  • the terminal determines to provide services to the terminal based on the identity of the PLMN that provides services to the terminal and the identity of the second PLMN.
  • the DC service occurs in the PLMN.
  • the terminal can learn whether DC occurs in the PLMN serving itself by comparing the two. For example: It is known that there are 4 operators, corresponding to PLMN1, PLMN2, PLMN3, and PLMN4 respectively. DC occurs in PLMN1 and PLMN3, and the PLMN that provides services to the terminal is PLMN1. For the terminal, the identity of the PLMN that provides services to the terminal It is PLMN1. The identities of the second PLMN learned through the first message are PLMN1 and PLMN3. By comparing the two, it is learned that DC occurs in PLMN1 that provides services for itself.
  • the first message also includes third information, and the third information is used to indicate the identity of the PLMN supported by the access network device;
  • Methods also include:
  • the terminal determines the target PLMN according to the identity of the PLMN supported by the access network device and the identity of the first PLMN.
  • the identity of the PLMN supported by the access network device is used to indicate the PLMN that can connect and communicate with the access network device. It should be noted that among all the first PLMNs that provide disaster roaming services, there may be Not all are PLMNs supported by the access network equipment, so it is necessary to compare the identification of the PLMN supported by the access network equipment with the identification of the first PLMN to determine the target PLMN.
  • the PLMNs that provide disaster roaming services include PLMN2 and PLMN4, but the PLMN supported by the access network equipment is PLMN2, then PLMN2 still needs to provide services for the terminal, that is, the target PLMN is PLMN2.
  • a final target PLMN can be selected at this time.
  • each PLMN can be set in advance. Priority, the PLMN with the highest priority is selected as the target PLMN, or a default PLMN can be configured by the network side, and the default PLMN can be selected as the target PLMN, or a PLMN can be randomly selected as the target PLMN. This is not the case in the embodiment of the present application. Make specific limitations.
  • the first message is a first NAS message
  • the first NAS message is sent by the core network device of the target PLMN and forwarded to the terminal by the access network device.
  • the message used to inform the terminal of the information of the second PLMN where DC occurs and the information of the first PLMN that provides disaster roaming services is a NAS message sent by the core network device.
  • the NAS message carries information about the PLMN where the DC occurs and the information about the PLMN that provides disaster roaming services.
  • the target PLMN among the one or more first PLMNs is selected and determined by the access network device.
  • the method before the terminal receives the first message from the access network device, the method further includes:
  • the terminal sends the second NAS message to the PLMN that provides services for the terminal through the access network device.
  • the PLMN that provides services to the terminal refers to the PLMN that the terminal has previously registered to use. Although the PLMN may experience DC at this time and is no longer able to provide services to the terminal, the terminal does not know that the PLMN has experienced DC. , therefore the terminal will still send a NAS message to the PLMN that provides services to the terminal. Specifically, the NAS message carries information about the PLMN that provides services to the terminal, such as a PLMN ID.
  • the access network equipment is aware of it. Therefore, the second NAS message sent by the terminal to the core network equipment corresponding to the PLMN that provides services to the terminal will be ignored.
  • the access network device forwards the second NAS message to the target PLMN that provides disaster roaming services, and the second NAS message is used to request the establishment of a NAS connection with the PLMN that provides services for the terminal.
  • the second NAS message may be a Service request message or a registration message.
  • the first NAS message includes one or more of the following:
  • the above NAS message can be enhanced, and the NAS message carries the information of the PLMN where the DC occurs and the information of the PLMN that provides the disaster roaming service.
  • an embodiment of the present application provides a communication method.
  • the execution subject of the method is an access network device.
  • the access network device may be a base station accessed by a terminal.
  • the method includes:
  • Step 301 The access network device sends a first message.
  • the first message contains information about one or more first PLMNs that provide disaster roaming services; for example, it is known that there are four operators, corresponding to PLMN1, PLMN2, PLMN3, and PLMN4 respectively.
  • the one or more second PLMNs include PLMN1 and PLMN3, and the one or more first PLMNs include PLMN2 and PLMN4.
  • Step 302 The access network device receives the second message sent by the terminal.
  • the second message is used to request the target PLMN to provide services for the terminal.
  • the target PLMN is one of one or more first PLMNs.
  • the access network device sends a first message to the terminal, which contains information about one or more second PLMNs where DC occurs, and information about one or more first PLMNs that provide disaster roaming services.
  • the terminal Based on the first message, it is determined that a DC occurs in the PLMN that provides services for itself, and then the terminal sends a second message to the access network device, and uses the second message to request the target PLMN in one or more first PLMNs that provide disaster roaming services to provide the terminal with service, so that in the MOCN scenario, when a DC occurs in the PLMN that provides services for the UE, the PLMN that provides services for the terminal can be changed, so that the UE can continue to perform normal communication services.
  • PLMNs correspond to different operators.
  • the terminal By informing the terminal which PLMNs are subject to DC and which PLMNs provide disaster roaming services, it is convenient for the terminal to subsequently change the PLMN that provides services, that is, change to other operators.
  • the above target PLMN is a PLMN selected from one or more first PLMNs. Although there can be multiple PLMNs that can provide disaster roaming services, there can only be one PLMN that ultimately provides services to the terminal. One, therefore, a target PLMN needs to be selected from one or more first PLMNs. The selection of a specific target PLMN may be performed by the terminal or by the access network device.
  • the first message also contains information about one or more second PLMNs where the DC occurs.
  • the access network device can provide the information of the second PLMN where DC occurs to the terminal, so that the terminal determines whether the PLMN that provides services to itself has DC based on the information of the second PLMN.
  • the access network device only sends information about one or more first PLMNs that provide disaster roaming services to the terminal.
  • the terminal receives the information about the first PLMN, it can learn that it is provided with the disaster roaming service at this time.
  • the DC of the serving PLMN is to inform the terminal of the DC of the PLMN that provides services to the terminal and the information of the PLMN that can provide disaster roaming services by sending information about one or more first PLMNs that provide disaster roaming services.
  • the first message further includes first indication information, and the first indication information is used to indicate DC occurs in a PLMN that provides services for the terminal.
  • the access network device directly notifies the terminal of the occurrence of DC in the PLMN that provides services to the terminal by indicating the first indication information.
  • the information of the second PLMN where DC occurs and the information of the first PLMN that provides disaster roaming services can be specifically determined by the access network device.
  • the access network device learns the second PLMN according to instructions from the core network side.
  • the information of the PLMN and the information of the first PLMN, or the information of the second PLMN and the information of the first PLMN are obtained through some other methods.
  • the embodiment of this application allows the access network device to obtain the information of the second PLMN and the information of the first PLMN. The method is not specifically limited.
  • the information about the second PLMN includes the identity of the second PLMN
  • the information about the first PLMN includes the identity of the first PLMN
  • the identifier of the PLMN may be a PLMN ID.
  • the access network device uses the PLMN ID to enable the terminal to learn the PLMN where DC currently occurs and the PLMN that provides disaster roaming services.
  • the first message is a system broadcast message.
  • the access network device if the terminal is in the idle state and no RRC connection is established between the terminal and the access network device, the access network device provides the terminal with the information of the PLMN where DC occurs by sending a system broadcast message. , and information about PLMNs that provide disaster roaming services. That is, by enhancing the system broadcast message, the system broadcast message carries the information of the PLMN where DC occurs and the information of the PLMN that provides disaster roaming services.
  • system broadcast message is composed of multiple system information blocks (System Information Block, SIB).
  • SIB System Information Block
  • the information of the PLMN where DC occurs and the information of the PLMN that provides disaster roaming services can be carried in the same or different parts of the system broadcast message. in the SIB.
  • the method before the access network device sends the first message, the method further includes:
  • the access network device sends a paging message, and the paging message is used to instruct the terminal to receive the system broadcast message.
  • the paging message is used to instruct the terminal to receive the system broadcast message. It can be understood that since the access network equipment needs to tell the terminal the information of the PLMN where the DC occurs and the information of the PLMN that provides disaster roaming services through the system broadcast message, it is equivalent to the system broadcast message changing, so the access network equipment sends the search message. Call for news, The terminal is instructed to receive the system broadcast message through the paging message, thereby obtaining the information of the PLMN where the DC occurred and the information of the PLMN that provides the disaster roaming service.
  • the terminal receiving the system broadcast message can be understood as the terminal receiving and reading the system broadcast message.
  • the access network device receives the second message sent by the terminal, including:
  • the access network device receives the registration request message sent by the terminal.
  • the terminal sends a registration request message to the access network device to request the target PLMN in one or more first PLMNs to register. Therefore, the terminal can continue to obtain services in the target PLMN.
  • the first message is an RRC message.
  • the access network device can provide the terminal with the information of the PLMN where DC occurs through the RRC message, and provide disaster roaming services.
  • PLMN information that is, by enhancing the RRC message, the RRC message carries the information of the PLMN where DC occurs and the information of the PLMN that provides disaster roaming services.
  • the terminal can use the existing RRC connection to directly send a registration message to the target PLMN, which avoids the process of the terminal re-searching the network and reestablishing the RRC connection with the access network device, shortening the user service interruption time, and improving the user experience.
  • the access network device sends the first message, including:
  • the access network device When the terminal is in the connected state, the access network device sends the first message to the terminal;
  • the access network device receives the second message sent by the terminal, including:
  • the access network device receives the second message sent by the terminal through the RRC connection with the terminal.
  • the terminal since the terminal is in the connected state and there is an RRC connection between the terminal and the access network device, the terminal can directly use the existing RRC connection to send the second message to the access network device.
  • the RRC message includes one or more of the following:
  • the above RRC message can be enhanced, and the RRC message carries the information of the PLMN where DC occurs and the information of the PLMN that provides disaster roaming services.
  • the first message also includes third information, and the third information is used to indicate the identity of the PLMN supported by the access network device.
  • the first message is a first NAS message
  • the access network device sends the first message, including:
  • the access network device receives the first NAS message from the core network device of the target PLMN;
  • the access network device sends the first NAS message to the terminal.
  • the message used to inform the terminal of the information of the second PLMN where DC occurs and the information of the first PLMN that provides disaster roaming services is a NAS message sent by the core network device.
  • the NAS message carries information about the PLMN where the DC occurs and the information about the PLMN that provides disaster roaming services.
  • the method before the access network device sends the first message, the method further includes:
  • the access network device receives the second NAS message sent by the terminal.
  • the second NAS message is a NAS message sent to the core network device corresponding to the PLMN that provides services to the terminal.
  • the second NAS message is used to request and provide services for the terminal.
  • the PLMN providing services to the terminal establishes a NAS connection;
  • the access network device sends the second NAS message to the core network device.
  • the PLMN that provides services to the terminal refers to the PLMN that the terminal has previously registered to use. Although the PLMN may experience DC at this time and is no longer able to provide services to the terminal, the terminal does not know that the PLMN has experienced DC. , therefore the terminal will still send a NAS message to the PLMN that provides services to the terminal. Specifically, the NAS message carries information about the PLMN that provides services to the terminal, such as a PLMN ID.
  • the terminal does not know that DC occurs in the PLMN that provides services to the terminal, the access network equipment is aware of it. Therefore, the second NAS message sent by the terminal to the core network equipment corresponding to the PLMN that provides services to the terminal will be ignored.
  • the access network device forwards it to the core network device corresponding to the target PLMN that provides disaster roaming services, and the second NAS message is used to request the establishment of a NAS connection with the PLMN that provides services for the terminal.
  • the second NAS message may be a Service request message or a registration message.
  • the NAS sent by the terminal can still be forwarded to the target PLMN that provides disaster roaming services through the access network equipment, and then the target PLMN provides services for the terminal, ensuring that the terminal can continue to communicate. Improved user experience.
  • the method before the access network device sends the first message, the method further includes:
  • the access network device When the terminal is in the connected state, the access network device sends a third NAS message to the core network device.
  • the third NAS is used to notify the core network device that the terminal is in the connected state in the PLMN that provides services for the terminal.
  • the access network device can directly send a notification message to the core network device to notify the UE that it is in the connected state in the PLMN that provides services for the terminal.
  • the method further includes:
  • the access network device determines the target PLMN according to the identity of the PLMN supported by the access network device and the identity of the first PLMN.
  • the identity of the PLMN supported by the access network device is used to indicate the PLMN that can connect and communicate with the access network device. It should be noted that among all the first PLMNs that provide disaster roaming services, there may be Not all are PLMNs supported by the access network equipment, so it is necessary to compare the identification of the PLMN supported by the access network equipment with the identification of the first PLMN to determine the target PLMN.
  • the PLMNs that provide disaster roaming services include PLMN2 and PLMN4, but the PLMN supported by the access network equipment is PLMN2, then PLMN2 still needs to provide services for the terminal, that is, the target PLMN is PLMN2.
  • a final target PLMN can be selected at this time.
  • each PLMN can be set in advance. Priority, the PLMN with the highest priority is selected as the target PLMN, or a default PLMN can be configured by the network side, and the default PLMN can be selected as the target PLMN, or a PLMN can be randomly selected as the target PLMN. This is not the case in the embodiment of the present application. Make specific limitations.
  • the first NAS message includes one or more of the following:
  • the above NAS message can be enhanced, and the NAS message carries the information of the PLMN where the DC occurs and the information of the PLMN that provides the disaster roaming service.
  • an embodiment of the present application provides a communication method.
  • the execution subject of the method is a core network device.
  • the core network device is the core network device of the target PLMN that provides disaster roaming services.
  • the core network device can be an AMF device, including :
  • Step 401 The core network device receives a third message from the access network device.
  • the third message is used by the core network device to determine to send the first NAS message to the access network device.
  • the first NAS message includes one or more providers that provide disaster roaming services. Information about the first PLMN;
  • the access network device sends a first message to the terminal, which contains information about one or more second PLMNs where DC occurs, and information about one or more first PLMNs that provide disaster roaming services.
  • the terminal Based on the first message, it is determined that a DC occurs in the PLMN that provides services for itself, and then the terminal sends a second message to the access network device, and uses the second message to request the target PLMN in one or more first PLMNs that provide disaster roaming services to provide the terminal with service, so that in the MOCN scenario, when the PLMN that provides services for the UE fails, the PLMN that provides services for the terminal can be replaced, so that the UE can continue to carry out normal communication services.
  • PLMNs correspond to different operators.
  • the terminal By informing the terminal which PLMNs are subject to DC and which PLMNs provide disaster roaming services, it is convenient for the terminal to subsequently change the PLMN that provides services, that is, change to other operators.
  • the above target PLMN is a PLMN selected from one or more first PLMNs. Although there can be multiple PLMNs that can provide disaster roaming services, there can only be one PLMN that ultimately provides services to the terminal. Therefore, A target PLMN needs to be selected from one or more first PLMNs. The selection of a specific target PLMN may be performed by the terminal or by the access network device.
  • the first message also contains information about one or more second PLMNs where the DC occurs.
  • the core network device can provide the information of the second PLMN where DC occurs to the terminal, so that the terminal determines whether the PLMN that provides services to itself has DC based on the information of the second PLMN.
  • the core network device only sends information about one or more first PLMNs that provide disaster roaming services to the terminal.
  • the terminal receives the information about the first PLMN, it can know that it is providing services for itself at this time.
  • the DC of the PLMN occurs, that is, by sending information about one or more first PLMNs that provide disaster roaming services, it simultaneously informs the terminal of the DC of the PLMN that provides services for itself and the information of the PLMN that can provide disaster roaming services.
  • the first message further includes first indication information, and the first indication information is used to indicate DC occurs in a PLMN that provides services for the terminal.
  • the core network device directly notifies the terminal of the occurrence of DC in the PLMN that provides services to the terminal by indicating the first indication information.
  • the information of the second PLMN where DC occurs and the information of the first PLMN that provides disaster roaming services can be specifically determined by the access network device.
  • the access network device learns the second PLMN according to instructions from the core network side.
  • the information of the PLMN and the information of the first PLMN, or the information of the second PLMN and the information of the first PLMN are obtained through some other methods.
  • the embodiment of this application allows the access network device to obtain the information of the second PLMN and the information of the first PLMN. The method is not specifically limited.
  • the third message includes:
  • the PLMN that provides services to the terminal refers to the PLMN that the terminal has previously registered to use. Although the PLMN may experience DC at this time and is no longer able to provide services to the terminal, the terminal does not know that the PLMN has experienced DC. , therefore the terminal will still send a NAS message to the PLMN that provides services to the terminal. Specifically, the NAS message carries information about the PLMN that provides services to the terminal, such as a PLMN ID.
  • the third message includes:
  • the third NAS message is sent by the access network device to the core network device.
  • the third NAS is used to notify the core network device that the terminal is in a connected state in the PLMN that provides services for the terminal.
  • the access network device can directly send a notification message to the core network device to notify the UE that it is in the connected state in the PLMN that provides services for the terminal.
  • the third message is a message sent by the access network device to the second network, and the third message includes at least one of the following:
  • the terminal is a terminal that establishes an RRC connection with the access network equipment and generates DC for the PLMN that provides services to the terminal.
  • the terminal information is used by the access network device to notify the core network device of the terminal information that needs to provide disaster roaming services, so that the core network device can generate a NAS message for the terminal and send it to the terminal.
  • the information about the second PLMN includes the identity of the second PLMN
  • the information about the first PLMN includes the identity of the first PLMN
  • the identifier of the PLMN may specifically be a PLMN ID.
  • the terminal can learn the PLMN where DC currently occurs and the PLMN that provides disaster roaming services.
  • the first NAS message includes one or more of the following:
  • the above NAS message can be enhanced, and the NAS message carries the information of the PLMN where the DC occurs and the information of the PLMN that provides the disaster roaming service.
  • Embodiment 1 The base station notifies the UE through system broadcast
  • the premise of this embodiment is that the UE is in the registered state in the Op1 network, and the UE is currently in the idle state in Op1, that is, there is no RRC connection between the UE and the base station;
  • RAN receives instructions from the core network, such as Operations Administration and Maintenance (OAM) or AMF instructions, and RAN starts sending system broadcast messages, which include:
  • OAM Operations Administration and Maintenance
  • AMF Access Management Function
  • the UE After the UE receives the system broadcast message, it determines that the PLMN currently providing services to it has a core network Disaster, and determines that other PLMNs corresponding to the base station can provide core network disaster roaming services, then the UE initiates a call to the PLMN. registration request.
  • the UE determines the core network Disaster of the PLMN currently providing services to it based on the ID of its currently registered PLMN and the ID of the PLMN of the current core network Disaster broadcast by the base station. For example, the UE is currently registered in Op1, and the UE receives a system broadcast message from the base station that Op1 is in a core network disaster, and the UE determines it by comparing the two PLMN IDs.
  • the UE determines that other PLMNs corresponding to the base station can provide core network disaster roaming services based on the PLMN ID that it supports broadcasted by the base station where it currently resides and the ID of the PLMN that provides core network disaster roaming services. For example, if the base station broadcasts that it supports Op1 and Op2, and the base station broadcasts that Op2 can provide the core network disaster roaming service, the UE will make a determination based on these two pieces of information.
  • the UE reads the system broadcast message after receiving the paging message sent by the base station.
  • Embodiment 2 The base station notifies the UE through an RRC message
  • the premise of this embodiment is that the UE is in the registered state in the Op1 network, and the UE is currently in the connected state in Op1, that is, there is an RRC connection between the UE and the base station;
  • RAN receives instructions from the core network, such as OAM or AMF instructions, and RAN determines that Op1 is in the core network Disaster state based on the instructions:
  • the RAN determines the UEs currently connected in Op1 and sends an RRC message to each UE.
  • the information is used to notify the UE: a core network Disaster occurs in Op1.
  • Op1 can be represented by the PLMN ID of Op1;
  • Op2 can provide core network disaster roaming services, and Op2 can be represented by Op2’s PLMN ID.
  • the RRC message may specifically be an RRC connection reconfiguration (connection reconfiguration) message and a downlink (Downlink, DL) information transfer (information transfer) message.
  • the UE After receiving the RRC message, the UE determines that a core network Disaster occurs in Op1 and determines that Op2 corresponding to the base station can provide core network disaster roaming services. The UE uses the existing RRC connection to initiate a registration request to Op2.
  • the RRC setup complete message carries the PLMN ID of Op1;
  • the RAN directly performs step 1 so that the existing RRC connection can be utilized to direct the UE to Op2.
  • Embodiment 3 The base station forwards the message to the core network of Op2, and the core network of Op2 notifies the UE through the NAS message.
  • the premise of this embodiment is that the UE is in the registered state in the Op1 network, and the UE enters the connected state from the idle state.
  • the UE establishes an RRC connection with the RAN and sends a NAS message to Op1, such as a Service request message or a registration message.
  • the RAN determines that Op1 is in the core network Disaster state.
  • Op2 can provide core network disaster roaming services:
  • RAN forwards the NAS message of the UE to the core network of Op2;
  • the RAN can directly send a notification message to the core network element AMF of Op2 to notify the AMF of Op2 that the UE is in the connected state in Op1;
  • the AMF of Op2 sends a NAS message to the UE.
  • This NAS message is used to notify the UE:
  • Op1 can be represented by the PLMN ID of Op1;
  • Op2 can provide core network disaster roaming services, and Op2 can be represented by the PLMN ID of Op2;
  • NAS messages can be downlink NAS transport messages (DL NAS transport), configuration update commands (Configuration Update Command), and notifications (Notification).
  • DL NAS transport downlink NAS transport messages
  • Configuration Update Command Configuration Update Command
  • Notification Notification
  • the RAN After receiving the NAS message, the RAN sends it to the UE through the UE's existing RRC connection;
  • the UE determines that a core network Disaster occurs in Op1 and determines that Op2 corresponding to the base station can provide core network disaster roaming services.
  • the UE uses the existing RRC connection to initiate a registration request to Op2.
  • the execution subject may be a communication device.
  • a communication device performing a communication method is used as an example to describe the communication device provided by the embodiment of the present application.
  • an embodiment of the present application provides a communication device 600, including:
  • the first receiving module 601 is configured to receive a first message from the access network device, where the first message contains information about one or more first PLMNs that provide disaster roaming services;
  • the first sending module 602 is configured to send a second message to the access network device when it is determined that DC occurs in the PLMN that provides services for the communication device according to the first message, where the second message is used to Request one or more The target PLMN in the first PLMN provides services for the communication device.
  • the first message also contains information about one or more second PLMNs where DC occurs.
  • the terminal determines that a DC occurs in the PLMN that provides services to the terminal, including:
  • the terminal determines, based on the information of the first PLMN, that the DC occurs in the PLMN that provides services to the terminal.
  • the first message further includes first indication information, and the first indication information is used to indicate DC occurs in a PLMN that provides services for the terminal.
  • the information about the second PLMN includes the identity of the second PLMN
  • the information about the first PLMN includes the identity of the first PLMN
  • the first message is a system broadcast message.
  • the device further includes:
  • the fourth receiving module is configured to receive a paging message from the access network device before receiving the first message from the access network device, where the paging message is used to instruct the communication device to receive a system broadcast message.
  • the first sending module is used for:
  • the terminal sends a registration request message to the access network device.
  • the first message is a radio resource control RRC message.
  • the first receiving module is used for:
  • the terminal When the terminal is in a connected state, the terminal receives the first message from the access network device;
  • the first sending module is used for:
  • the terminal sends the second message to the access network device through an RRC connection with the access network device.
  • the device further includes:
  • a first establishment module configured to establish an RRC connection with the access network device
  • the third sending module is configured for the terminal to send a non-access layer NAS message to the PLMN that provides services for the terminal through the RRC connection.
  • the RRC message includes one or more of the following:
  • determining a DC in a PLMN that provides services for the terminal according to the first message includes:
  • the PLMN that provides services for the communication device According to the identification of the PLMN that provides services for the communication device and the identification of the second PLMN, it is determined that the PLMN that provides services for the communication device generates a DC.
  • the first message further includes third information, where the third information is used to indicate the identity of the PLMN supported by the access network device;
  • the device also includes:
  • a first determination module configured to determine the target PLMN according to the identity of the PLMN supported by the access network device and the identity of the first PLMN.
  • the first message is a first non-access layer NAS message
  • the first NAS message is sent by the core network device of the target PLMN and is sent by the access network device. forwarded to the communication device.
  • the device further includes:
  • a fourth sending module configured to send a second NAS message through the access network device to the core network device corresponding to the PLMN that provides services for the communication device before the terminal receives the first message from the access network device,
  • the second NAS message is used to request the establishment of a NAS connection with a PLMN that provides services for the terminal.
  • the first NAS message includes one or more of the following:
  • an embodiment of the present application provides a communication device 700, including:
  • the second sending module 701 is configured to send a first message, where the first message contains information about one or more first PLMNs that provide disaster roaming services;
  • the second receiving module 702 is configured to receive a second message sent by the terminal.
  • the second message is used to request a target PLMN to provide services for the terminal.
  • the target PLMN is one of one or more first PLMNs. .
  • the first message also contains information about one or more second PLMNs where DC occurs.
  • the first message further includes first indication information, and the first indication information is used to indicate DC occurs in a PLMN that provides services for the terminal.
  • the information about the second PLMN includes the identity of the second PLMN
  • the information about the first PLMN includes the identity of the first PLMN
  • the first message is a system broadcast message.
  • the device further includes:
  • the fifth sending module is configured to send a paging message before sending the first message, where the paging message is used to instruct the terminal to receive the system broadcast message.
  • the second receiving module is used for:
  • the first message is an RRC message.
  • the second sending module is used for:
  • the second receiving module is used for:
  • the second message sent by the terminal is received through an RRC connection with the terminal.
  • the RRC message includes one or more of the following:
  • the first message further includes third information, where the third information is used to indicate an identity of the PLMN supported by the communication device.
  • the first message is a first NAS message
  • the second sending module is used for:
  • the device further includes:
  • the fourth receiving module is configured to receive a second NAS message sent by the terminal before sending the first message.
  • the second NAS message is a NAS message sent to the core network device corresponding to the PLMN that provides services for the terminal. ;
  • a sixth sending module configured to send the second NAS message to the core network device
  • the second NAS message is used to request the establishment of a NAS connection with a PLMN that provides services for the terminal.
  • the device further includes:
  • the seventh sending module is configured to send a third NAS message to the core network device when the terminal is in a connected state before sending the first message.
  • the third NAS is used to send a third NAS message to the core network device.
  • the terminal is notified that it is in a connected state in the PLMN that provides services for the terminal.
  • the device further includes:
  • the second determination module is configured to determine the target PLMN according to the identity of the PLMN supported by the communication device and the identity of the first PLMN.
  • the first NAS message includes one or more of the following:
  • an embodiment of the present application provides a communication device 800, including:
  • the third receiving module 801 is configured to receive a third message from the access network device.
  • the third message is used to determine to send the first NAS message to the access network device.
  • the first NAS message includes providing disaster roaming service.
  • the communication device is a core network device of one or more target PLMNs in the first PLMN.
  • the first message also contains information about one or more second PLMNs where DC occurs.
  • the first message further includes first indication information, and the first indication information is used to indicate DC occurs in a PLMN that provides services for the terminal.
  • the third message includes:
  • the third message includes:
  • the third NAS message sent by the access network device to the communication device, the third NAS is used to notify the communication device that the terminal is in a connected state in the PLMN that provides services for the terminal.
  • the third message is a message sent by the access network device to the second network, and the third message includes at least one of the following:
  • the terminal is a terminal that establishes an RRC connection with the access network device and generates DC for the PLMN that provides services to the terminal.
  • the information about the second PLMN includes the identity of the second PLMN
  • the information about the first PLMN includes the identity of the first PLMN
  • the first NAS message includes one or more of the following:
  • the communication device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or may be a component in the electronic device, such as an integrated circuit or chip.
  • the electronic device may be a terminal or other devices other than the terminal.
  • terminals may include but are not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., which are not specifically limited in the embodiment of this application.
  • NAS Network Attached Storage
  • the communication device provided by the embodiment of the present application can implement each process implemented by the method embodiment in Figures 2 to 5d, and achieve the same technical effect. To avoid duplication, the details will not be described here.
  • this embodiment of the present application also provides a communication device 900, which includes a processor 901 and a memory 902.
  • the memory 902 stores programs or instructions that can be run on the processor 901, such as , when the communication device 900 is a terminal, when the program or instruction is executed by the processor 901, each step of the above communication method embodiment is implemented, and the same technical effect can be achieved.
  • the communication device 900 is a network device, when the program or instruction is executed by the processor 901, each step of the above communication method embodiment is implemented, and the same technical effect can be achieved. To avoid duplication, the details are not repeated here.
  • An embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein the communication interface is used for the terminal to receive a first message from an access network device, where the first message contains one or more DCs in a disaster situation.
  • the terminal determines that DC occurs in the PLMN that provides services to the terminal based on the first message
  • the terminal sends a second message to the access network device, where the second message is used to request one or A target PLMN among the plurality of first PLMNs provides services for the terminal.
  • This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment.
  • Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve the same technical effect.
  • FIG. 10 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.
  • the terminal 1000 includes but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009, a processor 1010, etc. At least some parts.
  • the terminal 1000 may also include a power supply (such as a battery) that supplies power to various components.
  • the power supply may be logically connected to the processor 1010 through a power management system, thereby managing charging, discharging, and power consumption through the power management system. Management and other functions.
  • the terminal structure shown in FIG. 10 does not constitute a limitation on the terminal.
  • the terminal may include more or fewer components than shown in the figure, or some components may be combined or arranged differently, which will not be described again here.
  • the input unit 1004 may include a graphics processing unit (Graphics Processing Unit, GPU) 10041 and a microphone 10042.
  • the graphics processor 10041 is responsible for the image capture device (GPU) in the video capture mode or the image capture mode. Process the image data of still pictures or videos obtained by cameras (such as cameras).
  • the display unit 1006 may include a display panel 10061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like.
  • the user input unit 1007 includes at least one of a touch panel 10071 and other input devices 10072 .
  • Touch panel 10071 also known as touch screen.
  • the touch panel 10071 may include two parts: a touch detection device and a touch controller.
  • Other input devices 10072 may include but are not limited to physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be described again here.
  • the radio frequency unit 1001 after receiving downlink data from the network device, can transmit it to the processor 1010 for processing; in addition, the radio frequency unit 1001 can send uplink data to the network device.
  • the radio frequency unit 1001 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.
  • Memory 1009 may be used to store software programs or instructions as well as various data.
  • the memory 1009 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, Image playback function, etc.) etc.
  • memory 1009 may include volatile memory or nonvolatile memory, or memory 1009 may include both volatile and nonvolatile memory.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM).
  • RAM Random Access Memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM Double Data Rate SDRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • Synch link DRAM, SLDRAM synchronous link dynamic random access memory
  • Direct Rambus RAM Direct Rambus RAM
  • the memory x09 in the embodiment of the present application includes,
  • the processor 1010 may include one or more processing units; optionally, the processor 1010 integrates an application processor and a modem processor, where the application processor mainly handles operations related to the operating system, user interface, application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the above modem processor may not be integrated into the processor 1010.
  • the radio frequency unit 1001 is configured to receive a first message from the access network device, where the first message contains information about one or more first PLMNs that provide disaster roaming services;
  • a second message is sent to the access network device, where the second message is used to request one or more of the The target PLMN in the first PLMN provides services for the terminal.
  • the first message also contains information about one or more second PLMNs where DC occurs.
  • the first message further includes first indication information, and the first indication information is used to indicate DC occurs in a PLMN that provides services for the terminal.
  • the information about the second PLMN includes the identity of the second PLMN
  • the information about the first PLMN includes the identity of the first PLMN
  • the first message is a system broadcast message.
  • the radio frequency unit 1001 is also used to:
  • a paging message is received from the access network device, and the paging message is used to instruct the terminal to receive a system broadcast message.
  • the radio frequency unit 1001 is also used for:
  • the first message is a radio resource control RRC message.
  • the radio frequency unit 1001 is also used for:
  • RF unit 1001 also used for:
  • the second message is sent to the access network device through an RRC connection with the access network device.
  • the radio frequency unit 1001 is also used for:
  • the RRC message includes one or more of the following:
  • the terminal determines, according to the first message, that a DC occurs in the PLMN that provides services for the terminal, including:
  • the terminal determines that the DC occurs in the PLMN that provides services for the terminal based on the identification of the PLMN that provides services for the terminal and the identification of the second PLMN.
  • the first message also includes third information, where the third information is used to indicate the identity of the PLMN supported by the access network device;
  • the method also includes:
  • the terminal determines the target PLMN according to the identity of the PLMN supported by the access network device and the identity of the first PLMN.
  • the first message is a first non-access layer NAS message
  • the first NAS message is sent by the core network device of the target PLMN and forwarded by the access network device to the terminal. of.
  • the processor 1010 is configured to:
  • the access network device sends a second NAS message to the core network device corresponding to the PLMN that provides services for the terminal, where the second NAS message is used to request the establishment of a NAS connection with the PLMN that provides services for the terminal.
  • the first NAS message includes one or more of the following:
  • An embodiment of the present application also provides a network device, including a processor and a communication interface.
  • the communication interface is used for the access network device to send a first message, and the first The message contains information about one or more first PLMNs that provide disaster roaming services;
  • the access network device receives a second message sent by the terminal, and the second message is used to request the target PLMN to provide services for the terminal, and the The target PLMN is one of one or more first PLMNs.
  • the core network device receives a third message from the access network device, and the third message is used by the core network device to determine to send the first NAS to the access network device.
  • the first NAS message contains information about one or more first PLMNs that provide disaster roaming services; wherein the core network device is a network device of a target PLMN in one or more of the first PLMNs.
  • This network equipment embodiment corresponds to the above-mentioned network equipment method embodiment. Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this network equipment embodiment, and can achieve the same technical effect.
  • the embodiment of the present application also provides a network device.
  • the network device 1100 includes: an antenna 111 , a radio frequency device 112 , a baseband device 113 , a processor 114 and a memory 115 .
  • the antenna 111 is connected to the radio frequency device 112 .
  • the radio frequency device 112 receives information through the antenna 111 and sends the received information to the baseband device 113 for processing.
  • the baseband device 113 processes the information to be sent and sends it to the radio frequency device 112.
  • the radio frequency device 112 processes the received information and then sends it out through the antenna 111.
  • the method performed by the network device in the above embodiment can be implemented in the baseband device 113, which includes a baseband processor.
  • the baseband device 113 may include, for example, at least one baseband board on which multiple chips are disposed, as shown in FIG. 11 .
  • One of the chips is, for example, a baseband processor, which is connected to the memory 115 through a bus interface to call the memory.
  • the program in 115 performs the network device operations shown in the above method embodiment.
  • the network device may also include a network interface 116, such as a common public radio interface (CPRI).
  • a network interface 116 such as a common public radio interface (CPRI).
  • CPRI common public radio interface
  • the network device 1100 in this embodiment of the present invention also includes: instructions or programs stored in the memory 115 and executable on the processor 114.
  • the processor 114 calls the instructions or programs in the memory 115 to execute the modules shown in Figure 7
  • the implementation method and achieve the same technical effect will not be repeated here to avoid repetition.
  • the embodiment of the present application also provides a network device.
  • the network device 1200 includes: a processor 1201, a network interface 1202 and a memory 1203.
  • the network interface 1202 is, for example, a common public radio interface (CPRI).
  • CPRI common public radio interface
  • the network device 1200 in this embodiment of the present invention also includes: instructions or programs stored in the memory 1203 and executable on the processor 1201.
  • the processor 1201 calls the instructions or programs in the memory 1203 to execute the modules shown in Figure 8 The implementation method and achieve the same technical effect will not be repeated here to avoid repetition.
  • Embodiments of the present application also provide a readable storage medium.
  • Programs or instructions are stored on the readable storage medium.
  • the program or instructions are executed by a processor, each process of the above communication method embodiment is implemented and the same can be achieved. To avoid repetition, the technical effects will not be repeated here.
  • the processor is the processor in the terminal described in the above embodiment.
  • the readable storage medium includes computer readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disk or optical disk, etc.
  • An embodiment of the present application further provides a chip.
  • the chip includes a processor and a communication interface.
  • the communication interface is coupled to the processor.
  • the processor is used to run programs or instructions to implement each of the above communication method embodiments. The process can achieve the same technical effect. To avoid repetition, it will not be described again here.
  • chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.
  • Embodiments of the present application further provide a computer program/program product.
  • the computer program/program product is stored in a storage medium.
  • the computer program/program product is executed by at least one processor to implement the above communication method embodiment.
  • Each process can achieve the same technical effect. To avoid duplication, it will not be described again here.
  • Embodiments of the present application also provide a communication system, including: a terminal, an access network device, and a core network device.
  • the terminal can be used to perform the steps of the terminal side method as described above.
  • the access network device can be used to perform the above steps.
  • the core network device may be used to perform the steps of the core network device side method as described above.
  • the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation.
  • the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to related technologies.
  • the computer software product is stored in a storage medium (such as ROM/RAM, disk, CD), including several instructions to cause a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of this application.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本申请公开了一种通信方法、设备及可读存储介质，属于通信技术领域，该方法包括：终端从接入网设备接收第一消息，所述第一消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；在所述终端根据所述第一消息确定为所述终端提供服务的PLMN发生DC的情况下，所述终端向所述接入网设备发送第二消息，所述第二消息用于请求一个或多个所述第一PLMN中的目标PLMN为所述终端提供服务。

Description

通信方法、设备及可读存储介质
相关申请的交叉引用
本申请主张在2022年8月12日在中国提交的中国专利申请No.202210971810.6的优先权，其全部内容通过引用包含于此。
技术领域
本申请属于通信技术领域，具体涉及一种通信方法、设备及可读存储介质。
背景技术
多运营商核心网(Multi-Operator Core Network，MOCN)，是指多个运营商公用一套无线网络，即同一套基站可以同时连接到多个运营商(Operator，Op)的核心网(Core Network，CN)。各运营商共享无线网络资源(小区载频)不共享CN节点，CN节点属于不同运营商。
无线接入网络(Radio Access Network，RAN)节点通过系统广播消息广播支持的公共陆地移动网络(Public Land Mobile Network，PLMN)的信息，例如PLMN ID。终端(User Equipment，UE)向RAN发起RRC连接建立时，会向RAN提供接入哪个运营商的信息，例如携带目标运营商的PLMN ID；RAN根据该信息将UE的请求路由到对应的运营商的核心网。
在MOCN场景下，当为UE提供服务的运营商的核心网发生故障即发生灾难情况(Disaster Condition，DC)时，UE将无法继续进行正常的通信业务。
发明内容
本申请实施例提供一种通信方法、设备及可读存储介质，能够解决在MOCN场景下，当为UE提供服务的运营商的核心网发生故障时，UE将无法继续进行正常的通信业务的问题。
第一方面，提供了一种通信方法，包括：
终端从接入网设备接收第一消息，所述第一消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
在所述终端根据所述第一消息确定为所述终端提供服务的PLMN发生DC的情况下，所述终端向所述接入网设备发送第二消息，所述第二消息用于请求一个或多个所述第一PLMN中的目标PLMN为所述终端提供服务。
第二方面，提供了一种通信方法，包括：
接入网设备发送第一消息，所述第一消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
所述接入网设备接收终端发送的第二消息，所述第二消息用于请求目标PLMN为所述终端提供服务，所述目标PLMN是一个或多个所述第一PLMN中的一个。
第三方面，提供了一种通信方法，包括：
核心网设备从接入网设备接收第三消息，所述第三消息用于所述核心网设备确定向所述接入网设备发送第一NAS消息，所述第一NAS消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
其中，所述核心网设备为一个或多个所述第一PLMN中的目标PLMN的网络设备。
第四方面，提供了一种通信装置，包括：
第一接收模块，用于从接入网设备接收第一消息，所述第一消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
第一发送模块，用于在根据所述第一消息确定为所述通信装置提供服务的PLMN发生DC的情况下，向所述接入网设备发送第二消息，所述第二消息用于请求一个或多个所述第一PLMN中的目标PLMN为所述通信装置提供服务。
第五方面，提供了一种通信装置，包括：
第二发送模块，用于发送第一消息，所述第一消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
第二接收模块，用于接收终端发送的第二消息，所述第二消息用于请求目标PLMN为所述终端提供服务，所述目标PLMN是一个或多个所述第一PLMN中的一个。
第六方面，提供了一种通信装置，包括：
第三接收模块，用于从接入网设备接收第三消息，所述第三消息用于确定向所述接入网设备发送第一NAS消息，所述第一NAS消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
其中，所述通信装置为一个或多个所述第一PLMN中的目标PLMN的网络设备。
第七方面，提供了一种终端，该终端包括处理器和存储器，所述存储器存储可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如第一方面所述的方法的步骤。
第八方面，提供了一种终端，包括处理器及通信接口，其中，所述通信接口用于终端从接入网设备接收第一消息，所述第一消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
在所述终端根据所述第一消息确定为所述终端提供服务的PLMN发生DC的情况下，所述终端向所述接入网设备发送第二消息，所述第二消息用于请求一个或多个所述第一PLMN中的目标PLMN为所述终端提供服务。
第九方面，提供了一种网络设备，该网络设备包括处理器和存储器，所述存储器存储 可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如第二方面或第三方面所述的方法的步骤。
第十方面，提供了一种网络设备，包括处理器及通信接口，
其中，当网络设备为上述接入网设备时，所述通信接口用于接入网设备发送第一消息，所述第一消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
所述接入网设备接收终端发送的第二消息，所述第二消息用于请求目标PLMN为所述终端提供服务，所述目标PLMN是一个或多个所述第一PLMN中的一个。
其中，当网络设备为上述接入网设备时，核心网设备从接入网设备接收第三消息，所述第三消息用于所述核心网设备确定向所述接入网设备发送第一NAS消息，所述第一NAS消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
其中，所述核心网设备为一个或多个所述第一PLMN中的目标PLMN的网络设备。
第十一方面，提供了一种通信系统，包括：终端、接入网设备和核心网设备，所述终端可用于执行如第一方面所述的通信方法的步骤，所述接入网设备可用于执行如第二方面所述的通信方法的步骤，所述核心网设备可用于执行如第三方面所述的通信方法的步骤。
第十二方面，提供了一种可读存储介质，所述可读存储介质上存储程序或指令，所述程序或指令被处理器执行时实现如第一方面所述的方法的步骤，或者实现如第二方面所述的方法的步骤，或者实现如第三方面所述的方法的步骤。
第十三方面，提供了一种芯片，所述芯片包括处理器和通信接口，所述通信接口和所述处理器耦合，所述处理器用于运行程序或指令，实现如第一方面所述的方法的步骤，或者实现如第二方面所述的方法的步骤，或者实现如第三方面所述的方法的步骤。
第十四方面，提供了一种计算机程序/程序产品，所述计算机程序/程序产品被存储在存储介质中，所述计算机程序/程序产品被至少一个处理器执行以实现如第一方面所述的方法的步骤，或者实现如第二方面所述的方法的步骤，或者实现如第三方面所述的方法的步骤。
在本申请实施例中，接入网设备向终端发送第一消息，其中包含提供灾难漫游服务的一个或多个第一PLMN的信息，终端基于第一消息确定为自身提供服务的PLMN发生DC，然后终端向接入网设备发送第二消息，通过第二消息请求提供灾难漫游服务的一个或多个第一PLMN中的目标PLMN为终端提供服务，这样在MOCN场景下，当为UE提供服务的PLMN发生故障时，能够实现为终端更换提供服务的PLMN，使UE能够继续进行正常的通信业务。
附图说明
图1是本申请实施例可应用的一种无线通信系统的框图；
图2是本申请实施例提供的通信方法的流程示意图之一；
图3是本申请实施例提供的通信方法的流程示意图之二；
图4是本申请实施例提供的通信方法的流程示意图之三；
图5a是本申请实施例提供的应用场景示意图；
图5b是本申请实施例提供的应用实施例的流程示意图之一；
图5c是本申请实施例提供的应用实施例的流程示意图之二；
图5d是本申请实施例提供的应用实施例的流程示意图之三；
图6是本申请实施例提供的通信装置的结构示意图之一；
图7是本申请实施例提供的通信装置的结构示意图之二；
图8是本申请实施例提供的通信装置的结构示意图之三；
图9是本申请实施例提供的通信设备的结构示意图；
图10是本申请实施例提供的终端的结构示意图；
图11是本申请实施例提供的网络设备的结构示意图之一；
图12是本申请实施例提供的网络设备的结构示意图之二。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本申请保护的范围。
本申请的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象，而不用于描述特定的顺序或先后次序。应该理解这样使用的术语在适当情况下可以互换，以便本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施，且“第一”、“第二”所区别的对象通常为一类，并不限定对象的个数，例如第一对象可以是一个，也可以是多个。此外，说明书以及权利要求中“和/或”表示所连接对象的至少其中之一，字符“/”一般表示前后关联对象是一种“或”的关系。
值得指出的是，本申请实施例所描述的技术不限于长期演进型(Long Term Evolution，LTE)/LTE的演进(LTE-Advanced，LTE-A)系统，还可用于其他无线通信系统，诸如码分多址(Code Division Multiple Access，CDMA)、时分多址(Time Division Multiple Access，TDMA)、频分多址(Frequency Division Multiple Access，FDMA)、正交频分多址(Orthogonal Frequency Division Multiple Access，OFDMA)、单载波频分多址(Single-carrier Frequency Division Multiple Access，SC-FDMA)和其他系统。本申请实施例中的术语“系统”和“网络”常被可互换地使用，所描述的技术既可用于以上提及的系统和无线电技术，也可用于其他系统和无线电技术。以下描述出于示例目的描述了新空口(New Radio，NR)系统，并且在以下大部分描述中使用NR术语，但是这些技术也可应用于NR系统应用以外的应用，如第6代(6th Generation，6G)通信系统。
图1示出本申请实施例可应用的一种无线通信系统的框图。无线通信系统包括终端11和网络设备12。其中，终端11可以是手机、平板电脑(Tablet Personal Computer)、膝上 型电脑(Laptop Computer)或称为笔记本电脑、个人数字助理(Personal Digital Assistant，PDA)、掌上电脑、上网本、超级移动个人计算机(ultra-mobile personal computer，UMPC)、移动上网装置(Mobile Internet Device，MID)、增强现实(augmented reality，AR)/虚拟现实(virtual reality，VR)设备、机器人、可穿戴式设备(Wearable Device)、车载设备(Vehicle User Equipment，VUE)、行人终端(Pedestrian User Equipment，PUE)、智能家居(具有无线通信功能的家居设备，如冰箱、电视、洗衣机或者家具等)、游戏机、个人计算机(personal computer，PC)、柜员机或者自助机等终端侧设备，可穿戴式设备包括：智能手表、智能手环、智能耳机、智能眼镜、智能首饰(智能手镯、智能手链、智能戒指、智能项链、智能脚镯、智能脚链等)、智能腕带、智能服装等。除了上述终端设备，也可以是终端内的芯片，例如调制解调器(Modem)芯片，系统级芯片(System on Chip，SoC)。需要说明的是，在本申请实施例并不限定终端11的具体类型。网络设备12可以包括接入网设备或核心网设备，其中，接入网设备也可以称为无线接入网设备、无线接入网(Radio Access Network，RAN)、无线接入网功能或无线接入网单元。接入网设备可以包括基站、WLAN接入点或WiFi节点等，基站可被称为节点B、演进节点B(Evolved Node B，eNB)、接入点、基收发机站(Base Transceiver Station，BTS)、无线电基站、无线电收发机、基本服务集(Basic Service Set，BSS)、扩展服务集(Extended Service Set，ESS)、家用B节点、家用演进型B节点、发送接收点(Transmitting Receiving Point，TRP)或所述领域中其他某个合适的术语，只要达到相同的技术效果，所述基站不限于特定技术词汇，需要说明的是，在本申请实施例中仅以NR系统中的基站为例进行介绍，并不限定基站的具体类型。
由于本申请实施例针对MOCN场景，因此在网络中存在多个运营商的核心网，每个运营商的核心网内可以根据需求设置多个的核心网设备，需要说明的是，目前图1中为了简洁明了仅绘制一个核心网设备图形对应一个运营商的核心网，即图1可以理解为示出了包含两个运营商的核心网的无线通信系统。对于包含更多数量运营商的核心网的场景，本申请实施例同样适用。
核心网设备可以包含但不限于如下至少一项：核心网节点、核心网功能、移动管理实体(Mobility Management Entity，MME)、接入移动管理功能(Access and Mobility Management Function，AMF)、会话管理功能(Session Management Function，SMF)、用户平面功能(User Plane Function，UPF)、策略控制功能(Policy Control Function，PCF)、策略与计费规则功能单元(Policy and Charging Rules Function，PCRF)、边缘应用服务发现功能(Edge Application Server Discovery Function，EASDF)、统一数据管理(Unified Data Management，UDM)，统一数据仓储(Unified Data Repository，UDR)、归属用户服务器(Home Subscriber Server，HSS)、集中式网络配置(Centralized network configuration，CNC)、网络存储功能(Network Repository Function，NRF)，网络开放功能(Network Exposure Function，NEF)、本地NEF(Local NEF，或L-NEF)、绑定支持功能(Binding Support Function， BSF)、应用功能(Application Function，AF)等。需要说明的是，在本申请实施例中仅以NR系统中的核心网设备为例进行介绍，并不限定核心网设备的具体类型。
下面结合附图，通过一些实施例及其应用场景对本申请实施例提供的通信方法进行详细地说明。
参见图2，本申请实施例提供一种通信方法，该方法的执行主体为终端，方法包括：
步骤201：终端从接入网设备接收第一消息，第一消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
这里的DC也可以理解为核心网(Core Network)DC，即由于核心网故障或损坏导致的用户业务不可用。
步骤202：在终端根据第一消息确定为终端提供服务的PLMN发生DC的情况下，终端向接入网设备发送第二消息，第二消息用于请求一个或多个第一PLMN中的目标PLMN为终端提供服务。例如，已知存在4个运营商，分别对应PLMN1、PLMN2、PLMN3、PLMN4，如果PLMN1、PLMN3发生DC，而PLMN2、PLMN4能够提供灾难漫游服务，则上述一个或多个第二PLMN包括PLMN1、PLMN3，上述一个或多个第一PLMN包括PLMN2、PLMN4。
为终端提供服务的PLMN也可以理解为：终端当前在该PLMN内处于注册状态。
在本申请实施例中，接入网设备向终端发送第一消息，其中包含提供灾难漫游服务的一个或多个第一PLMN的信息，终端基于第一消息确定为自身提供服务的PLMN发生DC，然后终端向接入网设备发送第二消息，通过第二消息请求提供灾难漫游服务的一个或多个第一PLMN中的目标PLMN为终端提供服务，这样在MOCN场景下，当为UE提供服务的PLMN发生DC时，能够实现为终端更换提供服务的PLMN，使UE能够继续进行正常的通信业务。
上述接入网设备可以是终端接入的基站。
需要说明的是，不同的PLMN对应的是不同的运营商，通过告知终端哪些PLMN发生DC，哪些PLMN提供灾难漫游服务，便于后续为终端更换提供服务的PLMN，即更换其他的运营商。
可以理解的是，上述目标PLMN是从一个或多个第一PLMN中选择出的PLMN，虽然能够提供灾难漫游服务的PLMN可以有多个，但最终为终端提供服务的PLMN只能有一个，因此需要从一个或多个第一PLMN中选择出的目标PLMN，具体目标PLMN的选择可以由终端来执行或者也可以由接入网设备来执行。
在一种可能的实施方式中，第一消息还包含发生DC的一个或多个第二PLMN的信息。
即接入网设备可以将发生DC的第二PLMN的信息提供给终端，这样终端根据该第二PLMN的信息确定为自身提供的服务的PLMN是否发生DC。
在一种可能的实施方式中，所述终端确定为所述终端提供服务的PLMN发生DC，包括：
所述终端根据所述第一PLMN的信息，确定为所述终端提供服务的PLMN发生DC。
即接入网设备只向终端发送提供灾难漫游服务的一个或多个第一PLMN的信息，当终端接收到第一PLMN的信息，即可获知此时为自身提供服务的PLMN发生DC，即通过发送提供灾难漫游服务的一个或多个第一PLMN的信息的方式，同时完成告知终端为自身提供服务的PLMN发生DC，以及能够提供灾难漫游服务的PLMN的信息。
在一种可能的实施方式中，所述第一消息还包含第一指示信息，所述第一指示信息用于指示为所述终端提供服务的PLMN发生DC。
即接入网设备通过指示第一指示信息直接告知终端为自身提供服务的PLMN发生DC。
还需要说明的是，上述发生DC的第二PLMN的信息，以及提供灾难漫游服务的第一PLMN的信息具体可以由接入网设备确定，例如接入网设备根据核心网侧的指示获知第二PLMN的信息和第一PLMN的信息，或者通过其他一些方式来获得第二PLMN的信息和第一PLMN的信息，本申请实施例对接入网设备获知第二PLMN的信息和第一PLMN的信息的方式不做具体限定。
在一种可能的实施方式中，第二PLMN的信息包括第二PLMN的标识，第一PLMN的信息包括第一PLMN的标识。
在本申请实施例中，PLMN的标识具体可以是PLMN ID，接入网设备通过PLMN ID使终端获知当前发生DC的PLMN，以及提供灾难漫游服务的PLMN。
在一种可能的实施方式中，第一消息为系统广播消息。
在本申请实施例中，如果终端处于空闲态，此时终端与接入网设备之间没有建立无线资源控制(Radio Resource Control，RRC)连接，因此接入网设备通过发送系统广播消息的方式，向终端提供发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息。即，通过对系统广播消息进行增强，在系统广播消息中携带发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息。
需要说明的是，系统广播消息是由多个系统信息块(System Information Block，SIB)组成的，发生DC的PLMN的信息以及提供灾难漫游服务的PLMN的信息可以携带在系统广播消息的相同或不同的SIB中。
在一种可能的实施方式中，在终端从接入网设备接收第一消息之前，方法还包括：
终端从接入网设备接收寻呼消息。
在本申请实施例中，寻呼消息用于指示终端接收系统广播消息。可以理解的是，由于接入网设备需要通过系统广播消息告诉终端发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息，相当于系统广播消息发生了变化，因此接入网设备发送寻呼消息，通过寻呼消息指示终端接收系统广播消息，从而获得发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息。
终端接收系统广播消息可以理解为终端接收并读取系统广播消息。
在一种可能的实施方式中，终端向接入网设备发送第二消息，包括：
终端向接入网设备发送注册请求消息。
在本申请实施例中，终端向接入网设备发送注册请求消息，用于请求在一个或多个第一PLMN中的目标PLMN进行注册。从而终端可以在目标PLMN中继续获得服务。
在一种可能的实施方式中，第一消息为RRC消息。
在本申请实施例中，如果终端处于连接态，此时终端与接入网设备之间具有RRC连接，接入网设备可以通过RRC消息向终端提供发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息。即，通过对RRC消息进行增强，在RRC消息中携带发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息。终端可以利用现有的RRC连接直接向目标PLMN发送注册消息，避免了终端重新搜网并与接入网设备重建RRC连接的过程，缩短了用户服务中断的时间，提升了用户体验。
在一种可能的实施方式中，终端从接入网设备接收第一消息，包括：
终端在处于连接态的情况下，终端从接入网设备接收第一消息；
相应地，终端向接入网设备发送第二消息，包括：
终端通过与接入网设备之间的RRC连接向接入网设备发送第二消息。
在本申请实施例中，由于终端处于连接态，此时终端与接入网设备之间具有RRC连接，因此终端向接入网设备发送第二消息是可以直接使用现有的RRC连接。
在一种可能的实施方式中，方法还包括：
(1)终端与接入网设备建立RRC连接；
(2)终端通过RRC连接向为终端提供服务的PLMN发送非接入层(Non-access stratum，NAS)消息。
在本申请实施例中，如果终端处于空闲态，则终端可以先与接入网设备建立RRC连接，然后通过建立的RRC连接向为终端提供服务的PLMN发送NAS消息。需要说明的是，为终端提供服务的PLMN指的是终端先前注册使用的PLMN，虽然此时该PLMN可能发生DC，已无法为终端提供服务，但由于终端并不知道该PLMN发生了DC，因此终端仍然会向该为终端提供服务的PLMN发送NAS消息，具体地，在NAS消息中携带该为终端提供服务的PLMN的信息，例如PLMN ID。该NAS消息可以是服务请求(Service request)消息，或注册(registration)消息。
在一种可能的实施方式中，RRC消息包括以下一项或者多项：
(1)RRC连接重配消息；
(2)下行信息传输消息。
即可以对上述RRC消息进行增强，在RRC消息中携带发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息。
在一种可能的实施方式中，终端根据第一消息确定为终端提供服务的PLMN发生DC，包括：
终端根据为终端提供服务的PLMN的标识与第二PLMN的标识，确定为终端提供服 务的PLMN发生DC。
在本申请实施例中，终端基于为自身服务的PLMN的标识以及通过第一消息获知的第二PLMN的标识，两者进行比对即可获知为自身服务的PLMN是否发生DC。例如：已知存在4个运营商，分别对应PLMN1、PLMN2、PLMN3、PLMN4，其中PLMN1、PLMN3发生DC，而为终端提供服务的PLMN是PLMN1，对于终端来说，为终端提供服务的PLMN的标识是PLMN1，通过第一消息获知的第二PLMN的标识是PLMN1、PLMN3，两者比对即获知了为自身提供服务的PLMN1发生DC。
可以理解的是，如果为终端服务的PLMN的标识和通过第一消息获知的第二PLMN的标识比对之后，发现为终端服务的PLMN没有发生DC，那么这就属于正常情况，不会影响终端正常通信，也就无需做进一步处理。
在一种可能的实施方式中，第一消息中还包括第三信息，第三信息用于指示接入网设备支持的PLMN的标识；
方法还包括：
终端根据接入网设备支持的PLMN的标识与第一PLMN的标识，确定目标PLMN。
在本申请实施例中，接入网设备支持的PLMN的标识用于指示出能够与接入网设备连接通信的PLMN，需要说明的是，上述提供灾难漫游服务的所有第一PLMN中，可能并不全都是接入网设备支持的PLMN，因此需要将接入网设备支持的PLMN的标识与第一PLMN的标识进行比对，确定出目标PLMN。例如：提供灾难漫游服务的PLMN包括PLMN2和PLMN4，但接入网设备支持的PLMN是PLMN2，那么最终还是需要由PLMN2为终端提供服务，即目标PLMN是PLMN2。
需要说明的是，如果基于接入网设备支持的PLMN的标识与第一PLMN的标识仍然可以确定出多个PLMN的话，此时可以选取出一个最终的目标PLMN，例如：可以预先为各个PLMN设置优先级，选择优先级最高的PLMN作为目标PLMN，或者可以由网络侧配置一个默认PLMN，选择该默认PLMN作为目标PLMN，又或者可以随机选取出一个PLMN作为目标PLMN，本申请实施例对此不做具体限定。
在一种可能的实施方式中，第一消息为第一NAS消息，第一NAS消息是由目标PLMN的核心网设备发送，并由接入网设备转发给终端的。
在本申请实施例中，用于告知终端发生DC的第二PLMN的信息，以及提供灾难漫游服务的第一PLMN的信息的消息是由核心网设备发送的NAS消息，通过对NAS消息进行增强，在NAS消息中携带发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息。
需要说明的是，在本实施例中，关于一个或多个第一PLMN中的目标PLMN是由接入网设备选择确定的。
在一种可能的实施方式中，在终端从接入网设备接收第一消息之前，方法还包括：
终端通过接入网设备向为终端提供服务的PLMN发送第二NAS消息。
在本申请实施例中，为终端提供服务的PLMN指的是终端先前注册使用的PLMN，虽然此时该PLMN可能发生DC，已无法为终端提供服务，但由于终端并不知道该PLMN发生了DC，因此终端仍然会向该为终端提供服务的PLMN发送NAS消息，具体地，在NAS消息中携带该为终端提供服务的PLMN的信息，例如PLMN ID。
可以理解的是，虽然终端不知道为终端提供服务的PLMN发生DC，但接入网设备是知晓的，因此终端向为终端提供服务的PLMN对应的核心网设备发送的第二NAS消息，会被接入网设备转发给提供灾难漫游服务的目标PLMN，所述第二NAS消息用于请求与为所述终端提供服务的PLMN建立NAS连接。该第二NAS消息可以是Service request消息，或registration消息。
在一种可能的实施方式中，第一NAS消息包括以下一项或者多项：
(1)下行NAS传输消息；
(2)配置更新命令；
(3)通知消息。
即可以对上述NAS消息进行增强，在NAS消息中携带发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息。
参见图3，本申请实施例提供一种通信方法，该方法的执行主体是接入网设备，例如接入网设备可以是终端接入的基站，方法包括：
步骤301：接入网设备发送第一消息，第一消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；例如，已知存在4个运营商，分别对应PLMN1、PLMN2、PLMN3、PLMN4，如果PLMN1、PLMN3发生DC，而PLMN2、PLMN4能够提供灾难漫游服务，则上述一个或多个第二PLMN包括PLMN1、PLMN3，上述一个或多个第一PLMN包括PLMN2、PLMN4。
步骤302：接入网设备接收终端发送的第二消息，第二消息用于请求目标PLMN为终端提供服务，目标PLMN是一个或多个第一PLMN中的一个。
在本申请实施例中，接入网设备向终端发送第一消息，其中包含发生DC的一个或多个第二PLMN的信息，以及提供灾难漫游服务的一个或多个第一PLMN的信息，终端基于第一消息确定为自身提供服务的PLMN发生DC，然后终端向接入网设备发送第二消息，通过第二消息请求提供灾难漫游服务的一个或多个第一PLMN中的目标PLMN为终端提供服务，这样在MOCN场景下，当为UE提供服务的PLMN发生DC时，能够实现为终端更换提供服务的PLMN，使UE能够继续进行正常的通信业务。
需要说明的是，不同的PLMN对应的是不同的运营商，通过告知终端哪些PLMN发生DC，哪些PLMN提供灾难漫游服务，便于后续为终端更换提供服务的PLMN，即更换其他的运营商。
可以理解的是，上述目标PLMN是从一个或多个第一PLMN中选择出的PLMN，虽然能够提供灾难漫游服务的PLMN可以有多个，但最终为终端提供服务的PLMN只能有 一个，因此需要从一个或多个第一PLMN中选择出的目标PLMN，具体目标PLMN的选择可以由终端来执行或者也可以由接入网设备来执行。
在一种可能的实施方式中，第一消息还包含发生DC的一个或多个第二PLMN的信息。
即接入网设备可以将发生DC的第二PLMN的信息提供给终端，这样终端根据该第二PLMN的信息确定为自身提供的服务的PLMN是否发生DC。
在一种可能的实施方式中，接入网设备只向终端发送提供灾难漫游服务的一个或多个第一PLMN的信息，当终端接收到第一PLMN的信息，即可获知此时为自身提供服务的PLMN发生DC，即通过发送提供灾难漫游服务的一个或多个第一PLMN的信息的方式，同时完成告知终端为自身提供服务的PLMN发生DC，以及能够提供灾难漫游服务的PLMN的信息。
在一种可能的实施方式中，所述第一消息还包含第一指示信息，所述第一指示信息用于指示为所述终端提供服务的PLMN发生DC。
即接入网设备通过指示第一指示信息直接告知终端为自身提供服务的PLMN发生DC。还需要说明的是，上述发生DC的第二PLMN的信息，以及提供灾难漫游服务的第一PLMN的信息具体可以由接入网设备确定，例如接入网设备根据核心网侧的指示获知第二PLMN的信息和第一PLMN的信息，或者通过其他一些方式来获得第二PLMN的信息和第一PLMN的信息，本申请实施例对接入网设备获知第二PLMN的信息和第一PLMN的信息的方式不做具体限定。
在一种可能的实施方式中，第二PLMN的信息包括第二PLMN的标识，第一PLMN的信息包括第一PLMN的标识。
在本申请实施例中，PLMN的标识具体可以是PLMN ID，接入网设备通过PLMN ID使终端获知当前发生DC的PLMN，以及提供灾难漫游服务的PLMN。
在一种可能的实施方式中，第一消息为系统广播消息。
在本申请实施例中，如果终端处于空闲态，此时终端与接入网设备之间没有建立RRC连接，因此接入网设备通过发送系统广播消息的方式，向终端提供发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息。即，通过对系统广播消息进行增强，在系统广播消息中携带发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息。
需要说明的是，系统广播消息是由多个系统信息块(System Information Block，SIB)组成的，发生DC的PLMN的信息以及提供灾难漫游服务的PLMN的信息可以携带在系统广播消息的相同或不同的SIB中。
在一种可能的实施方式中，在接入网设备发送第一消息之前，方法还包括：
接入网设备发送寻呼消息，寻呼消息用于指示终端接收系统广播消息。
在本申请实施例中，寻呼消息用于指示终端接收系统广播消息。可以理解的是，由于接入网设备需要通过系统广播消息告诉终端发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息，相当于系统广播消息发生了变化，因此接入网设备发送寻呼消息， 通过寻呼消息指示终端接收系统广播消息，从而获得发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息。
终端接收系统广播消息可以理解为终端接收并读取系统广播消息。
在一种可能的实施方式中，接入网设备接收终端发送的第二消息，包括：
接入网设备接收终端发送的注册请求消息。
在本申请实施例中，终端向接入网设备发送注册请求消息，用于请求在一个或多个第一PLMN中的目标PLMN进行注册。从而终端可以在目标PLMN中继续获得服务。
在一种可能的实施方式中，第一消息为RRC消息。
在本申请实施例中，如果终端处于连接态，此时终端与接入网设备之间具有RRC连接，接入网设备可以通过RRC消息向终端提供发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息。即，通过对RRC消息进行增强，在RRC消息中携带发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息。终端可以利用现有的RRC连接直接向目标PLMN发送注册消息，避免了终端重新搜网并与接入网设备重建RRC连接的过程，缩短了用户服务中断的时间，提升了用户体验。
在一种可能的实施方式中，接入网设备发送第一消息，包括：
终端在处于连接态的情况下，接入网设备向终端发送第一消息；
相应地，接入网设备接收终端发送的第二消息，包括：
接入网设备通过与终端之间的RRC连接接收终端发送的第二消息。
在本申请实施例中，由于终端处于连接态，此时终端与接入网设备之间具有RRC连接，因此终端向接入网设备发送第二消息是可以直接使用现有的RRC连接。
在一种可能的实施方式中，RRC消息包括以下一项或者多项：
(1)RRC连接重配消息；
(2)下行信息传输消息。
即可以对上述RRC消息进行增强，在RRC消息中携带发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息。
在一种可能的实施方式中，第一消息中还包括第三信息，第三信息用于指示接入网设备支持的PLMN的标识。
在一种可能的实施方式中，第一消息为第一NAS消息；
接入网设备发送第一消息，包括：
接入网设备从目标PLMN的核心网设备接收第一NAS消息；
接入网设备向终端发送第一NAS消息。
在本申请实施例中，用于告知终端发生DC的第二PLMN的信息，以及提供灾难漫游服务的第一PLMN的信息的消息是由核心网设备发送的NAS消息，通过对NAS消息进行增强，在NAS消息中携带发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息。
在一种可能的实施方式中，在接入网设备发送第一消息之前，方法还包括：
(1)接入网设备接收终端发送的第二NAS消息，第二NAS消息是向为终端提供服务的PLMN对应的核心网设备发送的NAS消息，所述第二NAS消息用于请求与为所述终端提供服务的PLMN建立NAS连接；
(2)接入网设备向核心网设备发送第二NAS消息。
在本申请实施例中，为终端提供服务的PLMN指的是终端先前注册使用的PLMN，虽然此时该PLMN可能发生DC，已无法为终端提供服务，但由于终端并不知道该PLMN发生了DC，因此终端仍然会向该为终端提供服务的PLMN发送NAS消息，具体地，在NAS消息中携带该为终端提供服务的PLMN的信息，例如PLMN ID。
可以理解的是，虽然终端不知道为终端提供服务的PLMN发生DC，但接入网设备是知晓的，因此终端向为终端提供服务的PLMN对应的核心网设备发送的第二NAS消息，会被接入网设备转发给提供灾难漫游服务的目标PLMN对应的核心网设备，所述第二NAS消息用于请求与为所述终端提供服务的PLMN建立NAS连接。该第二NAS消息可以是Service request消息，或registration消息。这样即便是为终端提供服务的PLMN发生DC，仍然可以通过接入网设备将终端发送的NAS转发给提供灾难漫游服务的目标PLMN，进而由目标PLMN为终端提供服务，确保终端能够继续进行通信，提升了用户体验。
在一种可能的实施方式中，在接入网设备发送第一消息之前，方法还包括：
终端在处于连接态的情况下，接入网设备向核心网设备发送第三NAS消息，第三NAS用于向核心网设备通知终端在为终端提供服务的PLMN中处于连接态。
在本申请实施例中，如果终端处于连接态，则接入网设备可直接向核心网设备发送通知消息，用于通知UE在为终端提供服务的PLMN中处于连接态。
在一种可能的实施方式中，方法还包括：
接入网设备根据接入网设备支持的PLMN的标识与第一PLMN的标识，确定目标PLMN。
在本申请实施例中，接入网设备支持的PLMN的标识用于指示出能够与接入网设备连接通信的PLMN，需要说明的是，上述提供灾难漫游服务的所有第一PLMN中，可能并不全都是接入网设备支持的PLMN，因此需要将接入网设备支持的PLMN的标识与第一PLMN的标识进行比对，确定出目标PLMN。例如：提供灾难漫游服务的PLMN包括PLMN2和PLMN4，但接入网设备支持的PLMN是PLMN2，那么最终还是需要由PLMN2为终端提供服务，即目标PLMN是PLMN2。
需要说明的是，如果基于接入网设备支持的PLMN的标识与第一PLMN的标识仍然可以确定出多个PLMN的话，此时可以选取出一个最终的目标PLMN，例如：可以预先为各个PLMN设置优先级，选择优先级最高的PLMN作为目标PLMN，或者可以由网络侧配置一个默认PLMN，选择该默认PLMN作为目标PLMN，又或者可以随机选取出一个PLMN作为目标PLMN，本申请实施例对此不做具体限定。
在一种可能的实施方式中，第一NAS消息包括以下一项或者多项：
(1)下行NAS传输消息；
(2)配置更新命令；
(3)通知消息。
即可以对上述NAS消息进行增强，在NAS消息中携带发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息。
参见图4，本申请实施例提供一种通信方法，该方法的执行主体为核心网设备，核心网设备为提供灾难漫游服务的目标PLMN的核心网设备，例如核心网设备可以是AMF设备，包括：
步骤401：核心网设备从接入网设备接收第三消息，第三消息用于核心网设备确定向接入网设备发送第一NAS消息，第一NAS消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
在本申请实施例中，接入网设备向终端发送第一消息，其中包含发生DC的一个或多个第二PLMN的信息，以及提供灾难漫游服务的一个或多个第一PLMN的信息，终端基于第一消息确定为自身提供服务的PLMN发生DC，然后终端向接入网设备发送第二消息，通过第二消息请求提供灾难漫游服务的一个或多个第一PLMN中的目标PLMN为终端提供服务，这样在MOCN场景下，当为UE提供服务的PLMN发生故障时，能够实现为终端更换提供服务的PLMN，使UE能够继续进行正常的通信业务。
需要说明的是，不同的PLMN对应的是不同的运营商，通过告知终端哪些PLMN发生DC，哪些PLMN提供灾难漫游服务，便于后续为终端更换提供服务的PLMN，即更换其他的运营商。
可以理解的是，上述目标PLMN是从一个或多个第一PLMN中选择出的PLMN，虽然能够提供灾难漫游服务的PLMN可以有多个，但最终为终端提供服务的PLMN只能有一个，因此需要从一个或多个第一PLMN中选择出的目标PLMN，具体目标PLMN的选择可以由终端来执行或者也可以由接入网设备来执行。
在一种可能的实施方式中，第一消息还包含发生DC的一个或多个第二PLMN的信息。
即核心网设备可以将发生DC的第二PLMN的信息提供给终端，这样终端根据该第二PLMN的信息确定为自身提供的服务的PLMN是否发生DC。
在一种可能的实施方式中，核心网设备只向终端发送提供灾难漫游服务的一个或多个第一PLMN的信息，当终端接收到第一PLMN的信息，即可获知此时为自身提供服务的PLMN发生DC，即通过发送提供灾难漫游服务的一个或多个第一PLMN的信息的方式，同时完成告知终端为自身提供服务的PLMN发生DC，以及能够提供灾难漫游服务的PLMN的信息。
在一种可能的实施方式中，所述第一消息还包含第一指示信息，所述第一指示信息用于指示为所述终端提供服务的PLMN发生DC。
即核心网设备通过指示第一指示信息直接告知终端为自身提供服务的PLMN发生DC。还需要说明的是，上述发生DC的第二PLMN的信息，以及提供灾难漫游服务的第一PLMN的信息具体可以由接入网设备确定，例如接入网设备根据核心网侧的指示获知第二PLMN的信息和第一PLMN的信息，或者通过其他一些方式来获得第二PLMN的信息和第一PLMN的信息，本申请实施例对接入网设备获知第二PLMN的信息和第一PLMN的信息的方式不做具体限定。
在一种可能的实施方式中，第三消息包括：
终端向为终端提供服务的PLMN对应的核心网设备发送的第二NAS消息，所述第二NAS消息用于请求与为所述终端提供服务的PLMN建立NAS连接。
在本申请实施例中，为终端提供服务的PLMN指的是终端先前注册使用的PLMN，虽然此时该PLMN可能发生DC，已无法为终端提供服务，但由于终端并不知道该PLMN发生了DC，因此终端仍然会向该为终端提供服务的PLMN发送NAS消息，具体地，在NAS消息中携带该为终端提供服务的PLMN的信息，例如PLMN ID。
在一种可能的实施方式中，第三消息包括：
接入网设备向核心网设备发送的第三NAS消息，第三NAS用于向核心网设备通知终端在为终端提供服务的PLMN中处于连接态。
在本申请实施例中，如果终端处于连接态，则接入网设备可直接向核心网设备发送通知消息，用于通知UE在为终端提供服务的PLMN中处于连接态。
在一种可能的实施方式中，第三消息是接入网设备发送给第二网络的消息，第三消息包括以下至少一种：
(1)发生灾难情况DC的一个或多个第二PLMN的信息；
(2)提供灾难漫游服务的一个或多个第一PLMN的信息；
(3)提供第一NAS消息的第二指示信息；提供第一NAS消息的第二指示信息，用于接入网设备通知第二网络生成一个发送给终端的NAS消息。从而，接入网设备在收到该NAS消息后，接入网设备可以直接通过与终端间的RRC连接将该NAS消息发送给终端。
(4)终端的信息，终端是与接入网设备间建立RRC连接，且为终端提供服务的PLMN发生DC的终端。终端的信息用于接入网设备通知核心网设备，需要提供灾难漫游服务的终端的信息，从而核心网设备可以针对该终端生成NAS消息，并发送给该终端。
在一种可能的实施方式中，第二PLMN的信息包括第二PLMN的标识，第一PLMN的信息包括第一PLMN的标识。
在本申请实施例中，PLMN的标识具体可以是PLMN ID，通过PLMN ID使终端获知当前发生DC的PLMN，以及提供灾难漫游服务的PLMN。
在一种可能的实施方式中，第一NAS消息包括以下一项或者多项：
(1)下行NAS传输消息；
(2)配置更新命令；
(3)通知消息。
即可以对上述NAS消息进行增强，在NAS消息中携带发生DC的PLMN的信息，以及提供灾难漫游服务的PLMN的信息。
下面结合具体应用实施例对本申请的技术方案进行描述：
需要说明的是，为描述清楚简单，以下个实施例针对的场景如图5a所示，其中，Op1和Op2分别为RAN支持的运营商，其中UE在Op1网络内处于注册状态，在MOCN场景下，Op1的核心网发生故障，即发生DC，Op2能够提供灾难漫游服务。
实施例一：基站通过系统广播通知UE
本实施例的前提：UE在Op1网络内处于注册状态，当前UE在Op1内处于空闲(idle)态，即与UE与基站间无RRC连接；
参见图5b，流程如下：
1.RAN接收到核心网的指示，例如操作维护管理(Operations Administration and Maintenance，OAM)或AMF的指示，RAN开始发送系统广播消息，在消息中包括：
(1)出现核心网灾难(Disaster)的PLMN的ID，即Op1的PLMN ID
(2)提供核心网灾难漫游服务的PLMN的ID，即Op2的PLMN ID
2.UE收到系统广播消息后，通过系统广播消息，确定当前为其提供服务的PLMN出现核心网Disaster，并确定该基站对应的其他PLMN可提供核心网灾难漫游服务，则UE发起向该PLMN的注册请求。
UE具体是根据其当前注册的PLMN的ID，以及基站广播的当前出现核心网Disaster的PLMN的ID，确定当前为其提供服务的PLMN出现核心网Disaster。例如，UE当前在Op1内注册，UE收到基站的系统广播消息为Op1处于核心网灾难，UE通过比较2个PLMN ID确定。
UE具体是根据当前驻留的基站广播的其支持的PLMN ID，以及提供核心网灾难漫游服务的PLMN的ID，确定该基站对应的其他PLMN可提供核心网灾难漫游服务。例如，基站广播支持Op1和Op2，并且基站广播Op2可提供核心网灾难漫游服务，则UE根据这2个信息进行确定。
可选地，UE是收到基站发送的寻呼(paging)消息后读系统广播消息的
实施例二：基站通过RRC消息通知UE
本实施例的前提：UE在Op1网络内处于注册状态，当前UE在Op1内处于连接(connected)态，即与UE与基站间有RRC连接；
参见图5c，流程如下：
1.RAN接收到核心网的指示，例如OAM或AMF的指示，RAN根据该指示确定Op1处于核心网Disaster状态：
RAN确定当前在Op1内处于连接态的UE，并向每个UE发送RRC消息，该RRC消 息用于通知UE：Op1出现核心网Disaster，具体，Op1可通过Op1的PLMN ID表示；
Op2可提供核心网灾难漫游服务，Op2可通过Op2的PLMN ID表示
RRC消息具体可以是RRC连接重配(connection reconfiguration)消息，下行(Downlink，DL)信息传输(information transfer)消息。
2.UE收到该RRC消息后，确定Op1出现核心网Disaster，并确定该基站对应的Op2可提供核心网灾难漫游服务，则UE使用现有RRC连接向Op2发起注册请求。
需要说明的是，该方案也适用于UE从空闲态进入连接态的场景：
当RAN接收到UE发送的与Op1建立连接的请求，具体是在RRC建立完成(RRC setup complete)消息内携带Op1的PLMN ID；
RAN直接执行步骤1，从而可以利用现有RRC连接将UE引导到Op2。
实施例三：基站转发给Op2的核心网，Op2的核心网通过NAS消息通知UE
本实施例的前提：UE在Op1网络内处于注册状态，UE从空闲态进入连接态
参见图5d，流程如下：
1.UE与RAN建立RRC连接，并向Op1发送NAS消息，例如Service request消息，或registration消息
2.RAN根据核心网的指示，例如OAM或AMF的指示，RAN根据该指示确定Op1处于核心网Disaster状态，Op2可提供核心网灾难漫游服务：
RAN向Op2的核心网转发UE的NAS消息；
需要说明的是，若UE已处于连接态，则RAN可直接向Op2的核心网网元AMF发送通知消息，用于通知Op2的AMF，UE在Op1内处于连接态；
3.Op2的AMF向UE发送NAS消息，该NAS消息用于通知UE：
Op1出现核心网Disaster，具体，Op1可通过Op1的PLMN ID表示；
Op2可提供核心网灾难漫游服务，Op2可通过Op2的PLMN ID表示；
NAS消息具体可以是下行NAS传输消息(DL NAS transport)，配置更新命令(Configuration Update Command)，通知(Notification)。
4.RAN收到该NAS消息后，通过UE现有RRC连接发送给UE；
5.UE收到该NAS消息后，确定Op1出现核心网Disaster，并确定该基站对应的Op2可提供核心网灾难漫游服务，则UE使用现有RRC连接向Op2发起注册请求。
本申请实施例提供的通信方法，执行主体可以为通信装置。本申请实施例中以通信装置执行通信方法为例，说明本申请实施例提供的通信装置。
参见图6，本申请实施例提供一种通信装置600，包括：
第一接收模块601，用于从接入网设备接收第一消息，所述第一消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
第一发送模块602，用于在根据所述第一消息确定为所述通信装置提供服务的PLMN发生DC的情况下，向所述接入网设备发送第二消息，所述第二消息用于请求一个或多个 所述第一PLMN中的目标PLMN为所述通信装置提供服务。
在一种可能的实施方式中，所述第一消息还包含发生DC的一个或多个第二PLMN的信息。
在一种可能的实施方式中，所述终端确定为所述终端提供服务的PLMN发生DC，包括：
所述终端根据所述第一PLMN的信息，确定为所述终端提供服务的PLMN发生DC。
在一种可能的实施方式中，所述第一消息还包含第一指示信息，所述第一指示信息用于指示为所述终端提供服务的PLMN发生DC。
在一种可能的实施方式中，所述第二PLMN的信息包括所述第二PLMN的标识，所述第一PLMN的信息包括所述第一PLMN的标识。
在一种可能的实施方式中，所述第一消息为系统广播消息。
在一种可能的实施方式中，所述装置还包括：
第四接收模块，用于在从接入网设备接收第一消息之前，从所述接入网设备接收寻呼消息，所述寻呼消息用于指示所述通信装置接收系统广播消息。
在一种可能的实施方式中，所述第一发送模块，用于：
所述终端向所述接入网设备发送注册请求消息。
在一种可能的实施方式中，所述第一消息为无线资源控制RRC消息。
在一种可能的实施方式中，所述第一接收模块，用于：
所述终端在处于连接态的情况下，所述终端从所述接入网设备接收所述第一消息；
所述第一发送模块，用于：
所述终端通过与所述接入网设备之间的RRC连接向所述接入网设备发送所述第二消息。
在一种可能的实施方式中，所述装置还包括：
第一建立模块，用于与所述接入网设备建立RRC连接；
第三发送模块，用于所述终端通过所述RRC连接向为所述终端提供服务的PLMN发送非接入层NAS消息。
在一种可能的实施方式中，所述RRC消息包括以下一项或者多项：
RRC连接重配消息；
下行信息传输消息。
在一种可能的实施方式中，根据所述第一消息确定为所述终端提供服务的PLMN发生DC，包括：
根据为所述通信装置提供服务的PLMN的标识与所述第二PLMN的标识，确定为所述通信装置提供服务的PLMN发生DC。
在一种可能的实施方式中，所述第一消息中还包括第三信息，所述第三信息用于指示所述接入网设备支持的PLMN的标识；
所述装置还包括：
第一确定模块，用于根据所述接入网设备支持的PLMN的标识与所述第一PLMN的标识，确定所述目标PLMN。
在一种可能的实施方式中，所述第一消息为第一非接入层NAS消息，所述第一NAS消息是由所述目标PLMN的核心网设备发送，并由所述接入网设备转发给所述通信装置的。
在一种可能的实施方式中，所述装置还包括：
第四发送模块，用于在所述终端从接入网设备接收第一消息之前，通过所述接入网设备向为所述通信装置提供服务的PLMN对应的核心网设备发送第二NAS消息，所述第二NAS消息用于请求与为所述终端提供服务的PLMN建立NAS连接。
在一种可能的实施方式中，所述第一NAS消息包括以下一项或者多项：
下行NAS传输消息；
配置更新命令；
通知消息。
参见图7，本申请实施例提供一种通信装置700，包括：
第二发送模块701，用于发送第一消息，所述第一消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
第二接收模块702，用于接收终端发送的第二消息，所述第二消息用于请求目标PLMN为所述终端提供服务，所述目标PLMN是一个或多个所述第一PLMN中的一个。
在一种可能的实施方式中，所述第一消息还包含发生DC的一个或多个第二PLMN的信息。
在一种可能的实施方式中，所述第一消息还包含第一指示信息，所述第一指示信息用于指示为所述终端提供服务的PLMN发生DC。
在一种可能的实施方式中，所述第二PLMN的信息包括所述第二PLMN的标识，所述第一PLMN的信息包括所述第一PLMN的标识。
在一种可能的实施方式中，所述第一消息为系统广播消息。
在一种可能的实施方式中，所述装置还包括：
第五发送模块，用于在发送第一消息之前，发送寻呼消息，所述寻呼消息用于指示所述终端接收系统广播消息。
在一种可能的实施方式中，所述第二接收模块，用于：
接收所述终端发送的注册请求消息。
在一种可能的实施方式中，所述第一消息为RRC消息。
在一种可能的实施方式中，所述第二发送模块，用于：
所述终端在处于连接态的情况下，向所述终端发送第一消息；
所述第二接收模块，用于：
通过与所述终端之间的RRC连接接收所述终端发送的所述第二消息。
在一种可能的实施方式中，所述RRC消息包括以下一项或者多项：
RRC连接重配消息；
下行信息传输消息。
在一种可能的实施方式中，所述第一消息中还包括第三信息，所述第三信息用于指示所述通信装置支持的PLMN的标识。
在一种可能的实施方式中，所述第一消息为第一NAS消息；
所述第二发送模块，用于：
从所述目标PLMN的核心网设备接收所述第一NAS消息；
向所述终端发送所述第一NAS消息。
在一种可能的实施方式中，所述装置还包括：
第四接收模块，用于在发送第一消息之前，接收所述终端发送的第二NAS消息，所述第二NAS消息是向为所述终端提供服务的PLMN对应的核心网设备发送的NAS消息；
第六发送模块，用于向所述核心网设备发送所述第二NAS消息；
其中，所述第二NAS消息用于请求与为所述终端提供服务的PLMN建立NAS连接。
在一种可能的实施方式中，所述装置还包括：
第七发送模块，用于在发送第一消息之前，所述终端在处于连接态的情况下，向所述核心网设备发送第三NAS消息，所述第三NAS用于向所述核心网设备通知所述终端在为所述终端提供服务的PLMN中处于连接态。
在一种可能的实施方式中，所述装置还包括：
第二确定模块，用于根据所述通信装置支持的PLMN的标识与所述第一PLMN的标识，确定所述目标PLMN。
在一种可能的实施方式中，所述第一NAS消息包括以下一项或者多项：
下行NAS传输消息；
配置更新命令；
通知消息。
参见图8，本申请实施例提供一种通信装置800，包括：
第三接收模块801，用于从接入网设备接收第三消息，所述第三消息用于确定向所述接入网设备发送第一NAS消息，所述第一NAS消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
其中，所述通信装置为一个或多个所述第一PLMN中的目标PLMN的核心网设备。
在一种可能的实施方式中，所述第一消息还包含发生DC的一个或多个第二PLMN的信息。
在一种可能的实施方式中，所述第一消息还包含第一指示信息，所述第一指示信息用于指示为所述终端提供服务的PLMN发生DC。
在一种可能的实施方式中，所述第三消息包括：
终端向为所述终端提供服务的PLMN对应的核心网设备发送的第二NAS消息，所述第二NAS消息用于请求与为所述终端提供服务的PLMN建立NAS连接。
在一种可能的实施方式中，所述第三消息包括：
所述接入网设备向所述通信装置发送的第三NAS消息，所述第三NAS用于向所述通信装置通知终端在为所述终端提供服务的PLMN中处于连接态。
在一种可能的实施方式中，所述第三消息是所述接入网设备发送给所述第二网络的消息，所述第三消息包括以下至少一种：
发生灾难情况DC的一个或多个第二PLMN的信息；
提供灾难漫游服务的一个或多个第一PLMN的信息；
提供第一NAS消息的第二指示信息；
终端的信息，所述终端是与所述接入网设备间建立RRC连接，且为所述终端提供服务的PLMN发生DC的终端。
在一种可能的实施方式中，所述第二PLMN的信息包括所述第二PLMN的标识，所述第一PLMN的信息包括所述第一PLMN的标识。
在一种可能的实施方式中，所述第一NAS消息包括以下一项或者多项：
下行NAS传输消息；
配置更新命令；
通知消息。
本申请实施例中的通信装置可以是电子设备，例如具有操作系统的电子设备，也可以是电子设备中的部件，例如集成电路或芯片。该电子设备可以是终端，也可以为除终端之外的其他设备。示例性的，终端可以包括但不限于上述所列举的终端11的类型，其他设备可以为服务器、网络附属存储器(Network Attached Storage，NAS)等，本申请实施例不作具体限定。
本申请实施例提供的通信装置能够实现图2至图5d的方法实施例实现的各个过程，并达到相同的技术效果，为避免重复，这里不再赘述。
可选地，如图9所示，本申请实施例还提供一种通信设备900，包括处理器901和存储器902，存储器902上存储有可在所述处理器901上运行的程序或指令，例如，该通信设备900为终端时，该程序或指令被处理器901执行时实现上述通信方法实施例的各个步骤，且能达到相同的技术效果。该通信设备900为网络设备时，该程序或指令被处理器901执行时实现上述通信方法实施例的各个步骤，且能达到相同的技术效果，为避免重复，这里不再赘述。
本申请实施例还提供一种终端，包括处理器和通信接口，其中，所述通信接口用于终端从接入网设备接收第一消息，所述第一消息包含发生灾难情况DC的一个或多个第一公共陆地移动网络PLMN的信息，以及提供灾难漫游服务的一个或多个第一PLMN的信息； 在所述终端根据所述第一消息确定为所述终端提供服务的PLMN发生DC的情况下，所述终端向所述接入网设备发送第二消息，所述第二消息用于请求一个或多个所述第一PLMN中的目标PLMN为所述终端提供服务。该终端实施例与上述终端侧方法实施例对应，上述方法实施例的各个实施过程和实现方式均可适用于该终端实施例中，且能达到相同的技术效果。具体地，图10为实现本申请实施例的一种终端的硬件结构示意图。
该终端1000包括但不限于：射频单元1001、网络模块1002、音频输出单元1003、输入单元1004、传感器1005、显示单元1006、用户输入单元1007、接口单元1008、存储器1009以及处理器1010等中的至少部分部件。
本领域技术人员可以理解，终端1000还可以包括给各个部件供电的电源(比如电池)，电源可以通过电源管理系统与处理器1010逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。图10中示出的终端结构并不构成对终端的限定，终端可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置，在此不再赘述。
应理解的是，本申请实施例中，输入单元1004可以包括图形处理单元(Graphics Processing Unit，GPU)10041和麦克风10042，图形处理器10041对在视频捕获模式或图像捕获模式中由图像捕获装置(如摄像头)获得的静态图片或视频的图像数据进行处理。显示单元1006可包括显示面板10061，可以采用液晶显示器、有机发光二极管等形式来配置显示面板10061。用户输入单元1007包括触控面板10071以及其他输入设备10072中的至少一种。触控面板10071，也称为触摸屏。触控面板10071可包括触摸检测装置和触摸控制器两个部分。其他输入设备10072可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆，在此不再赘述。
本申请实施例中，射频单元1001接收来自网络设备的下行数据后，可以传输给处理器1010进行处理；另外，射频单元1001可以向网络设备发送上行数据。通常，射频单元1001包括但不限于天线、放大器、收发信机、耦合器、低噪声放大器、双工器等。
存储器1009可用于存储软件程序或指令以及各种数据。存储器1009可主要包括存储程序或指令的第一存储区和存储数据的第二存储区，其中，第一存储区可存储操作系统、至少一个功能所需的应用程序或指令(比如声音播放功能、图像播放功能等)等。此外，存储器1009可以包括易失性存储器或非易失性存储器，或者，存储器1009可以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)，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，DDRSDRAM)、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(Synch link DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DRRAM)。本申请实施例中的存储器x09包括但不限于这些和任意其它适合类型的存储器。
处理器1010可包括一个或多个处理单元；可选地，处理器1010集成应用处理器和调制解调处理器，其中，应用处理器主要处理涉及操作系统、用户界面和应用程序等的操作，调制解调处理器主要处理无线通信信号，如基带处理器。可以理解的是，上述调制解调处理器也可以不集成到处理器1010中。
其中，射频单元1001，用于从接入网设备接收第一消息，所述第一消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
在所述终端根据所述第一消息确定为所述终端提供服务的PLMN发生DC的情况下，向所述接入网设备发送第二消息，所述第二消息用于请求一个或多个所述第一PLMN中的目标PLMN为所述终端提供服务。
可选地，所述第一消息还包含发生DC的一个或多个第二PLMN的信息。
可选地，所述第一消息还包含第一指示信息，所述第一指示信息用于指示为所述终端提供服务的PLMN发生DC。
可选地，所述第二PLMN的信息包括所述第二PLMN的标识，所述第一PLMN的信息包括所述第一PLMN的标识。
可选地，所述第一消息为系统广播消息。
可选地，在所述终端从接入网设备接收第一消息之前，射频单元1001，还用于：
从所述接入网设备接收寻呼消息，所述寻呼消息用于指示所述终端接收系统广播消息。
可选地，射频单元1001，还用于：
向所述接入网设备发送注册请求消息。
可选地，所述第一消息为无线资源控制RRC消息。
可选地，射频单元1001，还用于：
所述终端在处于连接态的情况下，从所述接入网设备接收所述第一消息；
射频单元1001，还用于：
通过与所述接入网设备之间的RRC连接向所述接入网设备发送所述第二消息。
可选地，射频单元1001，还用于：
与所述接入网设备建立RRC连接；
通过所述RRC连接向为所述终端提供服务的PLMN发送非接入层NAS消息。
可选地，所述RRC消息包括以下一项或者多项：
RRC连接重配消息；
下行信息传输消息。
可选地，所述终端根据所述第一消息确定为所述终端提供服务的PLMN发生DC，包括：
所述终端根据为所述终端提供服务的PLMN的标识与所述第二PLMN的标识，确定为所述终端提供服务的PLMN发生DC。
可选地，所述第一消息中还包括第三信息，所述第三信息用于指示所述接入网设备支持的PLMN的标识；
所述方法还包括：
所述终端根据所述接入网设备支持的PLMN的标识与所述第一PLMN的标识，确定所述目标PLMN。
可选地，所述第一消息为第一非接入层NAS消息，所述第一NAS消息是由所述目标PLMN的核心网设备发送，并由所述接入网设备转发给所述终端的。
可选地，在所述终端从接入网设备接收第一消息之前，所述处理器1010，用于：
通过所述接入网设备向为所述终端提供服务的PLMN对应的核心网设备发送第二NAS消息，所述第二NAS消息用于请求与为所述终端提供服务的PLMN建立NAS连接。
可选地，所述第一NAS消息包括以下一项或者多项：
下行NAS传输消息；
配置更新命令；
通知消息。
本申请实施例还提供一种网络设备，包括处理器和通信接口，其中，当网络设备为上述接入网设备时，所述通信接口用于接入网设备发送第一消息，所述第一消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；所述接入网设备接收终端发送的第二消息，所述第二消息用于请求目标PLMN为所述终端提供服务，所述目标PLMN是一个或多个所述第一PLMN中的一个。其中，当网络设备为上述接入网设备时，核心网设备从接入网设备接收第三消息，所述第三消息用于所述核心网设备确定向所述接入网设备发送第一NAS消息，所述第一NAS消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；其中，所述核心网设备为一个或多个所述第一PLMN中的目标PLMN的网络设备。该网络设备实施例与上述网络设备方法实施例对应，上述方法实施例的各个实施过程和实现方式均可适用于该网络设备实施例中，且能达到相同的技术效果。
具体地，本申请实施例还提供了一种网络设备。如图11所示，该网络设备1100包括：天线111、射频装置112、基带装置113、处理器114和存储器115。天线111与射频装置112连接。在上行方向上，射频装置112通过天线111接收信息，将接收的信息发送给基带装置113进行处理。在下行方向上，基带装置113对要发送的信息进行处理，并发送给射频装置112，射频装置112对收到的信息进行处理后经过天线111发送出去。
以上实施例中网络设备执行的方法可以在基带装置113中实现，该基带装置113包括基带处理器。
基带装置113例如可以包括至少一个基带板，该基带板上设置有多个芯片，如图11所示，其中一个芯片例如为基带处理器，通过总线接口与存储器115连接，以调用存储器 115中的程序，执行以上方法实施例中所示的网络设备操作。
该网络设备还可以包括网络接口116，该接口例如为通用公共无线接口(common public radio interface，CPRI)。
具体地，本发明实施例的网络设备1100还包括：存储在存储器115上并可在处理器114上运行的指令或程序，处理器114调用存储器115中的指令或程序执行图7所示各模块执行的方法，并达到相同的技术效果，为避免重复，故不在此赘述。
具体地，本申请实施例还提供了一种网络设备。如图12所示，该网络设备1200包括：处理器1201、网络接口1202和存储器1203。其中，网络接口1202例如为通用公共无线接口(common public radio interface，CPRI)。
具体地，本发明实施例的网络设备1200还包括：存储在存储器1203上并可在处理器1201上运行的指令或程序，处理器1201调用存储器1203中的指令或程序执行图8所示各模块执行的方法，并达到相同的技术效果，为避免重复，故不在此赘述。
本申请实施例还提供一种可读存储介质，所述可读存储介质上存储有程序或指令，该程序或指令被处理器执行时实现上述通信方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
其中，所述处理器为上述实施例中所述的终端中的处理器。所述可读存储介质，包括计算机可读存储介质，如计算机只读存储器ROM、随机存取存储器RAM、磁碟或者光盘等。
本申请实施例另提供了一种芯片，所述芯片包括处理器和通信接口，所述通信接口和所述处理器耦合，所述处理器用于运行程序或指令，实现上述通信方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
应理解，本申请实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。
本申请实施例另提供了一种计算机程序/程序产品，所述计算机程序/程序产品被存储在存储介质中，所述计算机程序/程序产品被至少一个处理器执行以实现上述通信方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
本申请实施例还提供了一种通信系统，包括：终端、接入网设备和核心网设备，所述终端可用于执行如上所述终端侧方法的步骤，所述接入网设备可用于执行如上所述接入网设备侧方法的步骤，所述核心网设备可用于执行如上所述核心网设备侧方法的步骤。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。此外，需要指出的是，本申请实施方式中的方法和装置的范围不限按示出或讨论的顺序来执行功能，还可包 括根据所涉及的功能按基本同时的方式或按相反的顺序来执行功能，例如，可以按不同于所描述的次序来执行所描述的方法，并且还可以添加、省去、或组合各种步骤。另外，参照某些示例所描述的特征可在其他示例中被组合。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本申请的技术方案本质上或者说对相关技术做出贡献的部分可以以计算机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(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端(可以是手机，计算机，服务器，空调器，或者网络设备等)执行本申请各个实施例所述的方法。
上面结合附图对本申请的实施例进行了描述，但是本申请并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本申请的启示下，在不脱离本申请宗旨和权利要求所保护的范围情况下，还可做出很多形式，均属于本申请的保护之内。

Claims (47)

  1. 一种通信方法，包括：
    终端从接入网设备接收第一消息，所述第一消息包含提供灾难漫游服务的一个或多个第一公共陆地移动网络PLMN的信息；
    在所述终端确定为所述终端提供服务的PLMN发生灾难情况DC的情况下，所述终端向所述接入网设备发送第二消息，所述第二消息用于请求一个或多个所述第一PLMN中的目标PLMN为所述终端提供服务。
  2. 根据权利要求1所述的方法，其中，所述第一消息还包含发生DC的一个或多个第二PLMN的信息。
  3. 根据权利要求1所述的方法，其中，所述终端确定为所述终端提供服务的PLMN发生DC，包括：
    所述终端根据所述第一PLMN的信息，确定为所述终端提供服务的PLMN发生DC。
  4. 根据权利要求1所述的方法，其中，所述第一消息还包含第一指示信息，所述第一指示信息用于指示为所述终端提供服务的PLMN发生DC。
  5. 根据权利要求2所述的方法，其中，所述第二PLMN的信息包括所述第二PLMN的标识，所述第一PLMN的信息包括所述第一PLMN的标识。
  6. 根据权利要求1或5所述的方法，其中，
    所述第一消息为系统广播消息。
  7. 根据权利要求6所述的方法，其中，在所述终端从接入网设备接收第一消息之前，所述方法还包括：
    所述终端从所述接入网设备接收寻呼消息，所述寻呼消息用于指示所述终端接收系统广播消息。
  8. 根据权利要求1所述的方法，其中，所述终端向所述接入网设备发送第二消息，包括：
    所述终端向所述接入网设备发送注册请求消息。
  9. 根据权利要求1或5所述的方法，其中，
    所述第一消息为无线资源控制RRC消息。
  10. 根据权利要求9所述的方法，其中，
    所述终端从接入网设备接收第一消息，包括：
    所述终端在处于连接态的情况下，所述终端从所述接入网设备接收所述第一消息；
    所述终端向所述接入网设备发送第二消息，包括：
    所述终端通过与所述接入网设备之间的RRC连接向所述接入网设备发送所述第二消息。
  11. 根据权利要求9所述的方法，所述方法还包括：
    所述终端与所述接入网设备建立RRC连接；
    所述终端通过所述RRC连接向为所述终端提供服务的PLMN对应的核心网设备发送非接入层NAS消息。
  12. 根据权利要求9所述的方法，其中，所述RRC消息包括以下一项或者多项：
    RRC连接重配消息；
    下行信息传输消息。
  13. 根据权利要求5所述的方法，其中，所述终端确定为所述终端提供服务的PLMN发生DC，包括：
    所述终端根据为所述终端提供服务的PLMN的标识与所述第二PLMN的标识，确定为所述终端提供服务的PLMN发生DC。
  14. 根据权利要求5所述的方法，其中，所述第一消息中还包括第三信息，所述第三信息用于指示所述接入网设备支持的PLMN的标识；
    所述方法还包括：
    所述终端根据所述接入网设备支持的PLMN的标识与所述第一PLMN的标识，确定所述目标PLMN。
  15. 根据权利要求1或5所述的方法，其中，
    所述第一消息为第一非接入层NAS消息。
  16. 根据权利要求15所述的方法，其中，在所述终端从接入网设备接收第一消息之前，所述方法还包括：
    所述终端通过所述接入网设备向为所述终端提供服务的PLMN对应的核心网设备发送第二NAS消息，所述第二NAS消息用于请求与为所述终端提供服务的PLMN建立NAS连接。
  17. 根据权利要求15所述的方法，其中，所述第一NAS消息包括以下一项或者多项：
    下行NAS传输消息；
    配置更新命令；
    通知消息。
  18. 一种通信方法，包括：
    接入网设备发送第一消息，所述第一消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
    所述接入网设备接收终端发送的第二消息，所述第二消息用于请求目标PLMN为所述终端提供服务，所述目标PLMN是一个或多个所述第一PLMN中的一个。
  19. 根据权利要求18所述的方法，其中，所述第一消息还包含发生DC的一个或多个第二PLMN的信息。
  20. 根据权利要求18所述的方法，其中，所述第一消息还包含第一指示信息，所述第一指示信息用于指示为所述终端提供服务的PLMN发生DC。
  21. 根据权利要求19所述的方法，其中，所述第二PLMN的信息包括所述第二PLMN的标识，所述第一PLMN的信息包括所述第一PLMN的标识。
  22. 根据权利要求18或21所述的方法，其中，
    所述第一消息为系统广播消息。
  23. 根据权利要求22所述的方法，其中，在所述接入网设备发送第一消息之前，所述方法还包括：
    所述接入网设备发送寻呼消息，所述寻呼消息用于指示所述终端接收系统广播消息。
  24. 根据权利要求18所述的方法，其中，所述接入网设备接收终端发送的第二消息，包括：
    所述接入网设备接收所述终端发送的注册请求消息。
  25. 根据权利要求18或21所述的方法，其中，
    所述第一消息为RRC消息。
  26. 根据权利要求25所述的方法，其中，
    所述接入网设备发送第一消息，包括：
    所述终端在处于连接态的情况下，所述接入网设备向所述终端发送第一消息；
    所述接入网设备接收终端发送的第二消息，包括：
    所述接入网设备通过与所述终端之间的RRC连接接收所述终端发送的所述第二消息。
  27. 根据权利要求25所述的方法，其中，所述RRC消息包括以下一项或者多项：
    RRC连接重配消息；
    下行信息传输消息。
  28. 根据权利要求21所述的方法，其中，所述第一消息中还包括第三信息，所述第三信息用于指示所述接入网设备支持的PLMN的标识。
  29. 根据权利要求21所述的方法，其中，所述第一消息为第一NAS消息；
    所述接入网设备发送第一消息，包括：
    所述接入网设备从所述目标PLMN的核心网设备接收所述第一NAS消息；
    所述接入网设备向所述终端发送所述第一NAS消息。
  30. 根据权利要求29所述的方法，其中，在所述接入网设备发送第一消息之前，所述方法还包括：
    所述接入网设备接收所述终端发送的第二NAS消息，所述第二NAS消息是向为所述终端提供服务的PLMN对应的核心网设备发送的NAS消息；
    所述接入网设备向所述核心网设备发送所述第二NAS消息；
    其中，所述第二NAS消息用于请求与为所述终端提供服务的PLMN建立NAS连接。
  31. 根据权利要求29所述的方法，其中，在所述接入网设备发送第一消息之前，所述方法还包括：
    所述终端在处于连接态的情况下，所述接入网设备向所述核心网设备发送第三NAS 消息，所述第三NAS用于向所述核心网设备通知所述终端在为所述终端提供服务的PLMN中处于连接态。
  32. 根据权利要求29所述的方法，所述方法还包括：
    所述接入网设备根据所述接入网设备支持的PLMN的标识与所述第一PLMN的标识，确定所述目标PLMN。
  33. 根据权利要求29所述的方法，其中，所述第一NAS消息包括以下一项或者多项：
    下行NAS传输消息；
    配置更新命令；
    通知消息。
  34. 一种通信方法，包括：
    核心网设备从接入网设备接收第三消息，所述第三消息用于所述核心网设备确定向所述接入网设备发送第一NAS消息，所述第一NAS消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
    其中，所述核心网设备为一个或多个所述第一PLMN中的目标PLMN的核心网设备。
  35. 根据权利要求34所述的方法，其中，所述第一消息还包含发生DC的一个或多个第二PLMN的信息。
  36. 根据权利要求34所述的方法，其中，所述第一消息还包含第一指示信息，所述第一指示信息用于指示为终端提供服务的PLMN发生DC。
  37. 根据权利要求34所述的方法，其中，所述第三消息包括：
    终端向为所述终端提供服务的PLMN对应的核心网设备发送的第二NAS消息，所述第二NAS消息用于请求与为所述终端提供服务的PLMN建立NAS连接。
  38. 根据权利要求34所述的方法，其中，所述第三消息包括：
    所述接入网设备向所述核心网设备发送的第三NAS消息，所述第三NAS用于向所述核心网设备通知终端在为所述终端提供服务的PLMN中处于连接态。
  39. 根据权利要求34所述的方法，其中，所述第三消息是所述接入网设备发送给所述第二网络的消息，所述第三消息包括以下至少一种：
    发生灾难情况DC的一个或多个第二PLMN的信息；
    提供灾难漫游服务的一个或多个第一PLMN的信息；
    提供第一NAS消息的第二指示信息；
    终端的信息，所述终端是与所述接入网设备间建立RRC连接，且为所述终端提供服务的PLMN发生DC的终端。
  40. 根据权利要求34或39所述的方法，其中，所述第二PLMN的信息包括所述第二PLMN的标识，所述第一PLMN的信息包括所述第一PLMN的标识。
  41. 根据权利要求34所述的方法，其中，所述第一NAS消息包括以下一项或者多项：
    下行NAS传输消息；
    配置更新命令；
    通知消息。
  42. 一种通信装置，包括：
    第一接收模块，用于从接入网设备接收第一消息，所述第一消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
    第一发送模块，用于在根据所述第一消息确定为所述通信装置提供服务的PLMN发生DC的情况下，向所述接入网设备发送第二消息，所述第二消息用于请求一个或多个所述第一PLMN中的目标PLMN为所述通信装置提供服务。
  43. 一种通信装置，包括：
    第二发送模块，用于发送第一消息，所述第一消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
    第二接收模块，用于接收终端发送的第二消息，所述第二消息用于请求目标PLMN为所述终端提供服务，所述目标PLMN是一个或多个所述第一PLMN中的一个。
  44. 一种通信装置，包括：
    第三接收模块，用于从接入网设备接收第三消息，所述第三消息用于确定向所述接入网设备发送第一NAS消息，所述第一NAS消息包含提供灾难漫游服务的一个或多个第一PLMN的信息；
    其中，所述通信装置为一个或多个所述第一PLMN中的目标PLMN的网络设备。
  45. 一种终端，包括处理器和存储器，所述存储器存储可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如权利要求1至17任一项所述的通信方法的步骤。
  46. 一种网络设备，包括处理器和存储器，所述存储器存储可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如权利要求18至33任一项所述的通信方法的步骤，或者实现如权利要求34至41任一项所述的通信方法的步骤。
  47. 一种可读存储介质，所述可读存储介质上存储程序或指令，所述程序或指令被处理器执行时实现如权利要求1至17任一项所述的通信方法，或者实现如权利要求18至33任一项所述的通信方法的步骤，或者实现如权利要求34至41任一项所述的通信方法的步骤。
PCT/CN2023/111424 2022-08-12 2023-08-07 通信方法、设备及可读存储介质 WO2024032537A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210971810.6A CN117641513A (zh) 2022-08-12 2022-08-12 通信方法、设备及可读存储介质
CN202210971810.6 2022-08-12

Publications (1)

Publication Number Publication Date
WO2024032537A1 true WO2024032537A1 (zh) 2024-02-15

Family

ID=89850826

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/111424 WO2024032537A1 (zh) 2022-08-12 2023-08-07 通信方法、设备及可读存储介质

Country Status (2)

Country Link
CN (1) CN117641513A (zh)
WO (1) WO2024032537A1 (zh)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020218764A1 (ko) * 2019-04-26 2020-10-29 엘지전자 주식회사 무선 통신 시스템에서 네트워크에 등록을 수행하는 방법 및 이를 위한 장치
WO2022097098A1 (en) * 2020-11-05 2022-05-12 Telefonaktiebolaget Lm Ericsson (Publ) Core network becoming aware of plmns with disaster conditions
CN114727364A (zh) * 2021-01-07 2022-07-08 联发科技（新加坡）私人有限公司 有关网络灾难时和之后的ue和网络行为的方法及装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020218764A1 (ko) * 2019-04-26 2020-10-29 엘지전자 주식회사 무선 통신 시스템에서 네트워크에 등록을 수행하는 방법 및 이를 위한 장치
WO2022097098A1 (en) * 2020-11-05 2022-05-12 Telefonaktiebolaget Lm Ericsson (Publ) Core network becoming aware of plmns with disaster conditions
CN114727364A (zh) * 2021-01-07 2022-07-08 联发科技（新加坡）私人有限公司 有关网络灾难时和之后的ue和网络行为的方法及装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUAWEI, HISILICON: "Deregistration for UE not eligible for disaster roaming service", 3GPP DRAFT; S2-2107514, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. SA WG2, no. e-meeting; 20211018 - 20211022, 11 October 2021 (2021-10-11), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052062388 *

Also Published As

Publication number Publication date
CN117641513A (zh) 2024-03-01

Similar Documents

Publication Publication Date Title
CN117856999A (zh) 会话建立方法、中继设备的选择方法和注册方法及设备
US20230337128A1 (en) Network selection method and apparatus, device, and storage medium
US20230199633A1 (en) Network selection method, information sending method, information obtaining method, and apparatus
WO2024032537A1 (zh) 通信方法、设备及可读存储介质
WO2024032543A1 (zh) 信息获取方法、终端及接入网设备
WO2024037512A1 (zh) 网络接入方法、装置、终端及通信设备
WO2023179571A1 (zh) 非公共网络接入方法、装置及终端
WO2024022389A1 (zh) 小区连接方法、装置及相关设备
WO2023179595A1 (zh) 非3gpp设备的会话通道建立方法、装置及设备
WO2023165481A1 (zh) 网络故障的处理方法、终端、接入网设备及核心网设备
CN115134797B (zh) 紧急服务的处理方法、网络侧设备及终端
WO2024037632A1 (zh) 通信方法、终端及网络侧设备
WO2024022398A1 (zh) 托管网络的选网信息的获取方法、终端及网络侧设备
WO2023143422A1 (zh) 灾难漫游的控制方法、装置、终端及网络侧设备
WO2023185810A1 (zh) 终端路由选择策略ursp确定方法、终端及网络侧设备
WO2023213242A1 (zh) Ue策略信息的配置方法、装置、第一网络功能及终端
WO2023185728A1 (zh) 业务处理方法、装置、终端、网络侧设备及可读存储介质
WO2024032545A1 (zh) 灾难漫游方法、装置、终端、第一通信设备及第二网络
WO2024032499A1 (zh) Dns查询方法及通信设备
WO2024017023A1 (zh) 允许的nssai的获取方法、终端及网络侧设备
WO2023165422A1 (zh) 寻呼指示方法、装置、终端及网络侧设备
WO2024051630A1 (zh) 定位方法、装置、终端及网络侧设备
WO2024012304A1 (zh) 多播业务接收方法、装置、终端及网络侧设备
WO2024078589A1 (zh) 信息上报方法、装置、通信设备及存储介质
WO2024017244A1 (zh) 信息发送方法、信息接收方法、装置及相关设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23851758

Country of ref document: EP

Kind code of ref document: A1