CN114915958A - Disaster roaming method, device and system - Google Patents

Disaster roaming method, device and system Download PDF

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Publication number
CN114915958A
CN114915958A CN202110185266.8A CN202110185266A CN114915958A CN 114915958 A CN114915958 A CN 114915958A CN 202110185266 A CN202110185266 A CN 202110185266A CN 114915958 A CN114915958 A CN 114915958A
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China
Prior art keywords
disaster
roaming
plmn
information
network element
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Granted
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CN202110185266.8A
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Chinese (zh)
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CN114915958B (en
Inventor
舒林
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN202110185266.8A priority Critical patent/CN114915958B/en
Priority to JP2023548208A priority patent/JP2024506066A/en
Priority to KR1020237029757A priority patent/KR20230134605A/en
Priority to PCT/CN2022/071919 priority patent/WO2022170914A1/en
Publication of CN114915958A publication Critical patent/CN114915958A/en
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Publication of CN114915958B publication Critical patent/CN114915958B/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
    • 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
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • 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
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data

Abstract

The application provides a method, a device and a system for disaster roaming, which can reduce service interruption of terminal equipment, realize minimum service interruption and improve user experience. Specifically, the terminal equipment determines a first Public Land Mobile Network (PLMN) according to the stored information of the PLMN; the information of the disaster roaming PLMN comprises identification information of at least one PLMN allowing the terminal equipment to carry out disaster roaming, and the first PLMN is a PLMN in the at least one PLMN; the terminal equipment sends a registration request message to the first PLMN, wherein the registration request message comprises disaster roaming indication information, and the disaster roaming indication information is used for indicating the terminal equipment to request disaster roaming registration; and the terminal equipment receives the registration acceptance message sent by the first PLMN.

Description

Disaster roaming method, device and system
Technical Field
The present application relates to the field of communications, and more particularly, to a method, apparatus and system for disaster roaming.
Background
In the prior art, when a disaster occurs, a Home Public Land Mobile Network (HPLMN) of a terminal device (UE) may not be able to provide a service for the UE, and at this time, a service of the UE is interrupted and cannot be recovered.
Disclosure of Invention
The application provides a method, a device and a system for disaster roaming, which can reduce service interruption of terminal equipment, realize minimum service interruption and improve user experience.
In a first aspect, a method for disaster roaming performed in a terminal device is provided, the method comprising: determining a first PLMN according to stored information of disaster roaming Public Land Mobile Networks (PLMNs), wherein the information of the disaster roaming PLMN comprises identification information of at least one PLMN allowing terminal equipment to perform disaster roaming, and the first PLMN is a PLMN in the at least one PLMN; sending a registration request message to the first PLMN, wherein the registration request message comprises disaster roaming indication information, and the disaster roaming indication information is used for indicating the terminal equipment to request for disaster roaming registration; and receiving a registration acceptance message sent by the first PLMN.
According to the method provided by the application, under the condition of network service failure caused by disaster, the terminal equipment carries out disaster roaming and acquires the service, so that the service interruption of the terminal equipment can be reduced, the service interruption minimization is realized, and the user experience is improved.
With reference to the first aspect, in certain implementations of the first aspect, the information of the disaster roaming PLMN further includes disaster roaming service time.
With reference to the first aspect, in certain implementations of the first aspect, after the receiving the registration acceptance information sent by the first PLMN, the method further includes: disaster roaming is performed at the first PLMN during the disaster roaming service time.
With reference to the first aspect, in certain implementations of the first aspect, the method further includes: notifying a user that the terminal device is undergoing disaster roaming.
With reference to the first aspect, in some implementations of the first aspect, the determining the first PLMN includes: obtaining information of available PLMNs in a current location area, and selecting a PLMN in the at least one PLMN from the available PLMNs as the first PLMN.
With reference to the first aspect, in certain implementations of the first aspect, before the determining the first PLMN, the method further includes: and acquiring that the current PLMN providing service stops service due to disaster.
With reference to the first aspect, in some implementations of the first aspect, before the obtaining that the currently serving PLMN is out of service due to disaster, the method further includes: sending a first message to a second PLMN, the first message comprising capability information of the terminal device to support disaster roaming; receiving a second message sent by the second PLMN, wherein the second message comprises information of a disaster roaming PLMN; and storing the information of the disaster roaming PLMN according to the second message.
According to the method provided by the application, the terminal equipment and the second PLMN carry out capability negotiation, the second PLMN sends the information of the disaster roaming PLMN, and the terminal equipment stores the information of the disaster roaming PLMN, so that the disaster roaming can be executed when a subsequent disaster happens, the service interruption of the terminal equipment is further reduced, the minimum service interruption is realized, and the user experience is improved.
With reference to the first aspect, in certain implementations of the first aspect, the first message is a registration request message.
With reference to the first aspect, in certain implementations of the first aspect, the second message is any one of: a registration accept message, a registration reject message, a downlink non-access stratum NAS transport message, or a configuration update command message.
With reference to the first aspect, in certain implementations of the first aspect, the second message further includes indication information that allows the terminal device to perform disaster roaming.
With reference to the first aspect, in some implementations of the first aspect, when the second message is registration rejection information, the method further includes: and storing the identification information of the second PLMN in the information of the disaster roaming PLMN.
In a second aspect, there is provided a method of disaster roaming performed in a first network element, the method comprising: receiving a first message sent by a terminal device, wherein the first message comprises the capability information of the terminal device for supporting disaster roaming; acquiring disaster roaming PLMN information for providing disaster roaming service for the terminal equipment according to the capability information supporting disaster roaming; and sending a second message to the terminal equipment, wherein the second message comprises the information of the disaster roaming PLMN.
According to the method provided by the application, the terminal equipment and the second PLMN carry out capability negotiation, the second PLMN sends the information of the disaster roaming PLMN, and the terminal equipment stores the information of the disaster roaming PLMN, so that the disaster roaming can be executed when a subsequent disaster happens, the service interruption of the terminal equipment is further reduced, the minimum service interruption is realized, and the user experience is improved.
With reference to the second aspect, in some implementations of the second aspect, the first message is a registration request message.
With reference to the second aspect, in some implementations of the second aspect, the second message is any one of: a registration accept message, a registration reject message, a downlink non-access stratum NAS transport message, or a configuration update command message.
With reference to the second aspect, in some implementations of the second aspect, the second message further includes indication information that allows the terminal device to perform disaster roaming.
With reference to the second aspect, in some implementations of the second aspect, the obtaining information of a disaster roaming PLMN that provides disaster roaming service for the terminal device includes: and determining the information of the disaster roaming PLMN according to local configuration.
With reference to the second aspect, in some implementations of the second aspect, before the determining the information of the disaster roaming PLMN according to the local configuration, the method further includes: and determining to provide disaster roaming service for the terminal equipment according to the local configuration.
With reference to the second aspect, in some implementations of the second aspect, before the determining the information of the disaster roaming PLMN according to the local configuration, the method further includes: and receiving indication information which is sent by a second network element and needs to perform disaster roaming, wherein the indication information which needs to perform disaster roaming is used for indicating the first network element to execute disaster roaming service.
With reference to the second aspect, in some implementations of the second aspect, the obtaining information of a disaster roaming PLMN that provides disaster roaming service for the terminal device includes: and receiving the information of the disaster roaming PLMN sent by the second network element.
With reference to the second aspect, in some implementations of the second aspect, the receiving information of the disaster roaming PLMN sent by the second network element, the method further includes: and receiving indication information which is sent by the second network element and needs to perform disaster roaming, wherein the indication information which needs to perform disaster roaming is used for indicating the first network element to execute disaster roaming service.
With reference to the second aspect, in some implementations of the second aspect, before the receiving information that the disaster roaming indication information or the information of the disaster roaming PLMN is required, sent by the second network element, the method further includes: and sending the capability information of the terminal equipment for supporting disaster roaming to the second network element.
With reference to the second aspect, in some implementations of the second aspect, the information of the disaster roaming PLMN includes: identification information of at least one PLMN that allows disaster roaming by said terminal device; or, disaster roaming service time; or, the identification information of at least one PLMN allowing the terminal device to perform disaster roaming and the disaster roaming service time.
In a third aspect, a method for performing disaster roaming in a second network element is provided, the method including: receiving capability information of terminal equipment for supporting disaster roaming, which is sent by a first network element; determining to allow the terminal equipment to obtain disaster roaming service according to the capability information of the terminal equipment supporting the disaster roaming; and sending information of the disaster roaming PLMN of the terminal equipment to the first network element.
According to the method provided by the application, the first network element performs capability negotiation with the second network element by reporting the capability information of the terminal equipment, and the second network element issues the information of the disaster roaming PLMN, so that the terminal equipment stores the information of the disaster roaming PLMN, thereby ensuring that the disaster roaming is executed when a subsequent disaster happens, further reducing the service interruption of the terminal equipment, realizing the minimum service interruption and improving the user experience.
With reference to the third aspect, in certain implementations of the third aspect, the method further includes: and sending indication information needing disaster roaming to the first network element, wherein the indication information needing disaster roaming is used for indicating the first network element to execute disaster roaming service.
With reference to the third aspect, in certain implementations of the third aspect, the determining that the terminal device is allowed to obtain the disaster roaming service includes: and determining to allow the terminal equipment to obtain disaster roaming service according to the capability information of the terminal equipment supporting the disaster roaming and the local configuration.
With reference to the third aspect, in some implementations of the third aspect, before the sending, to the first network element, the information of the disaster roaming PLMN of the terminal device, the method further includes: and determining information of the disaster roaming PLMN of the terminal equipment according to the local configuration.
With reference to the third aspect, in some implementations of the third aspect, the information of the disaster roaming PLMN includes: identification information of at least one PLMN allowing disaster roaming by said terminal device; or, disaster roaming service times; or, the identification information of at least one PLMN allowing the terminal device to perform disaster roaming and the disaster roaming service time.
In a fourth aspect, a method of disaster roaming performed in a terminal device is provided, the method comprising: receiving system information sent by a third PLMN, wherein the system information comprises indication information allowing disaster roaming; sending a registration request message to the third PLMN according to the system information, wherein the registration request message comprises capability information of terminal equipment supporting disaster roaming and disaster roaming indication information; and receiving a registration acceptance message sent by the third PLMN, wherein the registration acceptance message comprises disaster roaming service time provided by the third PLMN.
According to the method provided by the application, after a disaster occurs, the terminal equipment receives the system information sent by the third PLMN, and then selects the third PLMN for disaster roaming, so that the service can be acquired, the service interruption of the terminal equipment is reduced, the minimum service interruption is realized, and the user experience is improved.
With reference to the fourth aspect, in certain implementations of the fourth aspect, the method further includes: disaster roaming is performed at the third PLMN during the disaster roaming service time.
With reference to the fourth aspect, in certain implementations of the fourth aspect, the method further includes: notifying a user that the terminal device is undergoing disaster roaming.
With reference to the fourth aspect, in some implementations of the fourth aspect, before the receiving the system information sent by the third PLMN, the method further includes: and obtaining that the fourth PLMN stops service due to disaster, wherein the fourth PLMN is the PLMN which provides service for the terminal equipment before disaster happens.
With reference to the fourth aspect, in some implementations of the fourth aspect, after learning that the fourth PLMN is out of service due to disaster, the method further includes: and acquiring information of available PLMNs in a current location area, and selecting a PLMN in the at least one PLMN from the available PLMNs as the third PLMN.
With reference to the fourth aspect, in certain implementations of the fourth aspect, the system information further includes identification information of the fourth PLMN.
In a fifth aspect, a disaster roaming device is provided, the device having functionality to implement the behavior of the method examples of the first aspect described above. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In one possible design, the apparatus includes a transceiver unit and a processing unit, and the processing unit is configured to determine a first PLMN according to stored information of disaster roaming public land mobile networks, PLMNs, where the information of the disaster roaming PLMN includes identification information of at least one PLMN that allows terminal equipment to perform disaster roaming, and the first PLMN is a PLMN of the at least one PLMN; the transceiver unit is configured to send a registration request message to the first PLMN, where the registration request message includes disaster roaming indication information, and the disaster roaming indication information is used to indicate the terminal device to request disaster roaming registration; the transceiver unit is further configured to receive a registration accept message sent by the first PLMN.
The modules may perform corresponding functions in the method example of the first aspect, for specific reference, detailed description of the method example is given, and details are not repeated here.
In a sixth aspect, an apparatus for disaster roaming is provided, where the apparatus may be a core network device or a chip for the core network device. The apparatus has the functionality to implement the actions in the method example of the second aspect described above. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above. In one possible design, the apparatus includes a transceiving unit and a processing unit, where the transceiving unit is configured to receive a first message sent by a terminal device, where the first message includes capability information of the terminal device that supports disaster roaming; the processing unit is used for acquiring information of a disaster roaming PLMN (public land Mobile network) for providing disaster roaming service for the terminal equipment according to the capability information supporting disaster roaming; the transceiver unit is further configured to send a second message to the terminal device, where the second message includes information of the disaster roaming PLMN.
The modules may perform corresponding functions in the method example of the second aspect, which refer to the detailed description in the method example specifically, and are not described herein again.
In a seventh aspect, an apparatus for disaster roaming is provided, where the apparatus may be a core network device, and may also be a chip for the core network device. The apparatus has the functionality to implement the actions in the method instance of the third aspect described above. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above. In one possible design, the apparatus includes a transceiver unit and a processing unit, where the transceiver unit is configured to receive capability information of the terminal device that supports disaster roaming, where the capability information is sent by a first network element; the processing unit is used for determining to allow the terminal equipment to obtain disaster roaming service according to the capability information of the terminal equipment for supporting the disaster roaming; the transceiver unit is further configured to send information of the disaster roaming PLMN of the terminal device to the first network element.
The modules may perform corresponding functions in the method example of the third aspect, for specific reference, detailed description of the method example is given, and details are not repeated here.
In an eighth aspect, there is provided a disaster roaming apparatus having functionality to implement the behavior of the method example of the fourth aspect. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above. In one possible design, the apparatus includes a transceiver unit and a processing unit, the transceiver unit is configured to receive system information sent by a third PLMN, the system information includes indication information that disaster roaming is allowed; the transceiver unit is further configured to send a registration request message to the third PLMN according to the system information, where the registration request message includes disaster roaming support capability information and disaster roaming indication information of the terminal device; the transceiver unit is further configured to receive a registration accept message sent by the third PLMN, where the registration accept message includes disaster roaming service time provided by the third PLMN.
These modules may perform corresponding functions in the method example of the fourth aspect, for specific reference, detailed description of the method example is given, and details are not repeated here.
In a ninth aspect, a system for disaster roaming is provided, the system comprising a first network element, a second network element; the first network element is used for sending the capability information of the terminal equipment for supporting disaster roaming; the second network element is configured to receive capability information of the terminal device for supporting disaster roaming; the second network element is further configured to determine to allow the terminal device to obtain a disaster roaming service according to the capability information of the terminal device for supporting disaster roaming; the second network element is further configured to send information of a disaster roaming PLMN of the terminal device; the first network element is further configured to receive information of a disaster roaming PLMN of the terminal device.
According to the embodiment, the first network element performs capability negotiation with the second network element by reporting the capability information of the terminal equipment, and the second network element issues the information of the disaster roaming PLMN, so that the terminal equipment stores the information of the disaster roaming PLMN, thereby ensuring that the disaster roaming is executed when a subsequent disaster occurs, further reducing the service interruption of the terminal equipment, realizing the minimum service interruption, and improving the user experience.
With reference to the ninth aspect, in some implementations of the ninth aspect, the second network element is further configured to send indication information that disaster roaming is required to be performed; the first network element is further configured to receive the indication information that disaster roaming is required; wherein, the indication information of the disaster roaming requirement is used for indicating the first network element to execute the disaster roaming service.
With reference to the ninth aspect, in some implementation manners of the ninth aspect, the second network element is configured to determine that the terminal device is allowed to obtain the disaster roaming service, and the second network element is specifically configured to: and determining to allow the terminal equipment to obtain disaster roaming service according to the capability information of the terminal equipment supporting the disaster roaming and the local configuration.
With reference to the ninth aspect, in some implementations of the ninth aspect, before the second network element is configured to send the information of the disaster roaming PLMN of the terminal device, the second network element is further configured to: and determining information of the disaster roaming PLMN of the terminal equipment according to local configuration.
With reference to the ninth aspect, in some implementations of the ninth aspect, the information of the disaster roaming PLMN includes: identification information of at least one PLMN that allows disaster roaming by said terminal device; or, disaster roaming service times; or, the identification information of at least one PLMN allowing the terminal device to perform disaster roaming and the disaster roaming service time.
In a tenth aspect, an apparatus is provided that includes a processor and a transceiver. The processor is connected with the transceiver. The processor is used for executing the instructions, and the transceiver is used for communicating with other network elements under the control of the processor. When the processor executes the instructions, the execution causes the apparatus to perform the method of any one of the above aspects or any possible implementation manner of any one of the above aspects. The apparatus also includes a memory to store instructions.
In an eleventh aspect, a computer-readable medium is provided, which stores a computer program (which may also be referred to as code, or instructions) that, when executed on a computer, causes the computer to perform the method of any one of the above aspects or any possible implementation of any one of the above aspects.
In a twelfth aspect, there is provided a communication chip having instructions stored therein, which when run on a computer device, cause the communication chip to perform the method of any of the above aspects or any possible implementation manner of any of the above aspects.
In a thirteenth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of the above aspects or any possible implementation of any one of the above aspects.
In a fourteenth aspect, a chip system is provided, which includes: the system comprises an input interface, an output interface, at least one processor and a memory, wherein the input interface, the output interface, the processor and the memory are connected through an internal connection path, the processor is used for executing codes in the memory, and when the codes are executed, the processor is used for executing the method in the aspects.
Based on the technical scheme, the service interruption of the terminal equipment can be reduced, the minimization of the service interruption is realized, and the user experience is improved.
Drawings
FIG. 1 is a schematic diagram of a 5G mobile communication system architecture;
FIG. 2 is a schematic flow chart diagram of a method of disaster roaming provided herein;
FIG. 3 is a schematic flow chart diagram of a method of disaster roaming provided herein;
FIG. 4 is a schematic flow chart diagram of a method of disaster roaming provided herein;
FIG. 5 is a schematic flow chart diagram of a method of disaster roaming provided herein;
FIG. 6 is a schematic flow chart diagram illustrating a particular example of a method for disaster roaming provided herein;
FIG. 7 is a schematic flow chart diagram illustrating a particular example of a method for disaster roaming provided herein;
FIG. 8 is a schematic flow chart diagram illustrating a particular example of a method for disaster roaming provided herein;
FIG. 9 is a schematic flow chart diagram illustrating a particular example of a method for disaster roaming provided herein;
FIG. 10 is a schematic flow chart diagram illustrating a particular example of a method for disaster roaming provided herein;
FIG. 11 is a schematic flow chart diagram of another method for disaster roaming provided herein;
FIG. 12 is a schematic block diagram of a disaster roaming device provided herein;
fig. 13 is a schematic block diagram of another disaster roaming device provided in the present application.
Detailed Description
The technical solution in the present application will be described below with reference to the accompanying drawings.
The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, a future fifth Generation (5G) System or a New Radio Network (NR), and future communications.
Fig. 1 is a schematic diagram illustrating a network architecture of a communication system, where the network architecture includes a terminal device, an access network device, an access management network element, a session management network element, a user plane network element, a policy control network element, a network slice selection network element, a network warehouse function network element, a network data analysis network element, a unified data management network element, a unified data storage network element, an authentication service function network element, a network capability opening network element, an application function network element, and a Data Network (DN) connected to an operator network, and is applicable to this embodiment. The terminal equipment can send service data to the data network through the access network equipment and the user plane network element, and receive the service data from the data network.
The terminal equipment has a wireless transceiving function, can be deployed on land and comprises an indoor or outdoor, handheld, wearable or vehicle-mounted terminal; can also be deployed on the water surface (such as a ship and the like); the terminal device may be a mobile phone (mobile phone), a tablet (Pad), a computer with wireless transceiving function, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving, a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid, a wireless terminal in transportation security, a wireless terminal in smart city, a wireless terminal in home application field, etc . The terminal device may also be referred to as User Equipment (UE), a mobile station, a remote station, and the like, and the embodiments of the present application do not limit the specific technology, the device form, and the name adopted by the terminal device.
An access network device is a device in a network for accessing a terminal device to a wireless network. The access network device may be a node in a radio access network, which may also be referred to as a base station, and may also be referred to as a Radio Access Network (RAN) node (or device). The network device may include an evolved Node B (NodeB or eNB or e-NodeB) in a Long Term Evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-a), such as a conventional macro base station eNB and a micro base station eNB in a heterogeneous network scenario, or may also include a next generation Node B (gNB) in a fifth generation mobile communication technology (5th generation, 5G) New Radio (NR) system, or may also include a radio network controller (radio network controller, RNC), a Node B (NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a transmission point (transmission point, TRP), a home base station (e.g., a home Node B, base station unit (HNB), a base station (Node B, HNB), BBU), a baseband pool BBU port, or a WiFi Access Point (AP), and further may further or may further include a Centralized Unit (CU) and a Distributed Unit (DU) in a cloud access network (cloudlen) system, which is not limited in the embodiment of the present application. In a scenario of separate deployment of an access network device including a CU and a DU, the CU supports Radio Resource Control (RRC), Packet Data Convergence Protocol (PDCP), Service Data Adaptation Protocol (SDAP), and other protocols; the DU mainly supports a Radio Link Control (RLC), a Medium Access Control (MAC) and a physical layer protocol.
An access management network element, which is mainly used for the attachment of a terminal in a mobile network, mobility management, and tracking area update processes, terminates a Non Access Stratum (NAS) message, completes registration management, connection management, reachability management, tracking area list (TA list) allocation, mobility management, and the like, and transparently routes a Session Management (SM) message to the session management network element. In a fifth generation (5G) communication system, the access management network element may be an access and mobility management function (AMF), and in a future communication system (e.g. a 6G communication system), the mobility management network element may still be an AMF network element, or may also have other names, which is not limited in this application.
The session management network element is mainly used for session management in a mobile network, such as session establishment, modification and release. The specific functions include allocating an Internet Protocol (IP) address to the terminal, selecting a user plane network element providing a message forwarding function, and the like. In the 5G communication system, the session management network element may be a Session Management Function (SMF), and in a future communication system (e.g. a 6G communication system), the session management network element may still be an SMF network element, or may also have another name, which is not limited in this application.
The user plane network element is mainly used for processing user messages, such as forwarding, charging, legal monitoring and the like. The user plane network element may also be referred to as a Protocol Data Unit (PDU) session anchor (PSA). In a 5G communication system, the user plane network element may be a User Plane Function (UPF), and in a future communication system (e.g., a 6G communication system), the user plane network element may still be a UPF network element, or may also have other names, which is not limited in this application.
The policy control network element includes a user subscription data management function, a policy control function, a charging policy control function, quality of service (QoS) control, and the like. In a 5G communication system, the policy control network element may be a Policy Control Function (PCF), and in a future communication system (e.g. a 6G communication system), the policy control network element may still be a PCF network element, or may also have other names, which is not limited in this application.
The network slice selection functional network element is mainly used for selecting a proper network slice for the service of the terminal equipment. In the 5G communication system, the network slice selection network element may be a Network Slice Selection Function (NSSF) network element, and in a future communication system (e.g., a 6G communication system), the network slice selection network element may still be an NSSF network element, or may also have other names, which is not limited in this application.
The network warehouse function network element is mainly used for providing registration and discovery functions of the network element or services provided by the network element. In the 5G communication system, the network warehouse function network element may be a network warehouse function (NRF), and in a future communication system (e.g. 6G communication system), the network warehouse function network element may still be an NRF network element, or may also have other names, which is not limited in this application.
The network data analysis network element may collect data from various Network Functions (NF), such as a policy control network element, a session management network element, a user plane network element, an access management network element, and an application function network element (through a network capability open function network element), and perform analysis and prediction. In a 5G communication system, the network data analysis network element may be a network data analysis function (NWDAF), and in a future communication system (for example, a 6G communication system), the network data analysis network element may still be an NWDAF network element, or may also have another name, which is not limited in this application.
And the unified data management network element is mainly used for managing the subscription information of the terminal equipment. In the 5G communication system, the unified data management network element may be a Unified Data Management (UDM), and in a future communication system (for example, a 6G communication system), the unified data management network element may still be a UDM network element, or may also have other names, which is not limited in this application.
The unified data storage network element is mainly used for storing structured data information, wherein the structured data information comprises subscription information, strategy information and network data or service data defined by a standard format. In the 5G communication system, the unified data storage network element may be a unified data storage (UDR), and in a future communication system (e.g. a 6G communication system), the unified data storage network element may still be a UDR network element, or may also have other names, which is not limited in this application.
And the authentication service function network element is mainly used for carrying out security authentication on the terminal equipment. In the 5G communication system, the authentication service function network element may be an authentication server function (AUSF), and in a future communication system (e.g., a 6G communication system), the authentication service function network element may still be an AUSF network element, or may also have other names, which is not limited in this application.
The network capability is opened, and part of the functions of the network can be exposed to the application in a controlled manner. In the 5G communication system, the network element with an open network capability may be a network capability open function (NEF), and in a future communication system (e.g., a 6G communication system), the network element with an open network capability may still be an NEF network element, or may also have another name, which is not limited in this application.
The application function network element may provide service data of various applications to a control plane network element of a communication network of an operator, or obtain data information and control information of the network from the control plane network element of the communication network. In the 5G communication system, the application function network element may be an Application Function (AF), and in a future communication system (e.g. a 6G communication system), the application function network element may still be an AF network element, or may also have other names, which is not limited in this application.
And the data network is mainly used for providing data transmission service for the terminal equipment. The data network may be a private network, such as a local area network, a Public Data Network (PDN) network, such as the Internet (Internet), or a private network co-deployed by an operator, such as a deployed IP multimedia network subsystem (IMS) service.
It should be understood that the above network elements or functions may be network elements in a hardware device, or may be software functions running on dedicated hardware, or virtualization functions instantiated on a platform (e.g., a cloud platform). Optionally, the network element or the function may be implemented by one device, may also be implemented by multiple devices together, and may also be a functional module in one device, which is not specifically limited in this embodiment of the present application.
For convenience of description, the following description of the present application takes an access management network element as an AMF network element and a unified data management network element as an UDM network element as an example. Further, the AMF network element is abbreviated as AMF, and the UDM network element is UDM. That is, the AMFs described later in this application may be replaced with an access management network element, and the UDM may be replaced with a unified data management network element.
The third generation partnership project (3rd generation partnership project, 3GPP) defines a network characteristic of minimizing service interruption (MINT) in Release 17(Release 17), where the network characteristic of the MINT mainly means that a user in a communication system can perform disaster roaming (disaster roaming) when a disaster condition occurs, so that a network service obtained by the user is not interrupted, that is, service interruption and failure caused by the disaster condition are reduced. The user may be referred to as a disaster-initiated roaming user (disaster-initiated roaming).
It should be understood that a disaster situation refers to a situation where a government decides to initiate or terminate, i.e., is regulated by the government. For example, natural disasters including earthquakes, tsunamis, fires, lightning strikes, floods, and the like; another example is a man-made disaster, including: terrorist attacks, war, etc. The disaster situation may be a disaster scene or a disaster situation. In the present application, for convenience of description, a disaster situation is used for detailed description.
It should be understood that disaster roaming refers to a special roaming policy that applies in disaster situations. A disaster roaming user refers to a user who cannot obtain services from a Public Land Mobile Network (PLMN) that the user normally serves due to a disaster, and the user may register with another PLMN to continue obtaining services, such as voice, data services, and the like.
The application provides a method, a device and a system for disaster roaming, which enable terminal equipment to perform disaster roaming and acquire services under the condition of network service failure caused by disaster situations, thereby reducing service interruption of the terminal equipment, realizing minimization of service interruption and improving user experience.
Fig. 2 shows a schematic flow chart of a method 200 for disaster roaming provided by the present application, the method comprising:
s201, the terminal device determines a first PLMN according to the stored information of the disaster roaming PLMNs, where the information of the disaster roaming PLMN includes identification (PLMN ID) information of at least one PLMN that allows the terminal device to perform disaster roaming, and the first PLMN is a PLMN in the at least one PLMN.
Specifically, in this embodiment of the present application, the terminal device may select a PLMN in the at least one PLMN as the first PLMN according to the stored identification information of the at least one PLMN.
In the embodiment of the present application, the process of selecting a PLMN by a terminal device is as follows: and the terminal equipment acquires the information of the available PLMNs in the current location area according to the stored information of the disaster roaming PLMN, and selects the PLMN in the at least one PLMN from the available PLMNs as a first PLMN. For example, the terminal device obtains information of available PLMNs in the current location area through cell scanning, and then selects a PLMN with a highest priority among the at least one PLMN in the available PLMNs as a first PLMN.
In an embodiment of the present application, the information of the disaster roaming PLMN may further include disaster roaming service time. Optionally, the disaster roaming service time is saved for the terminal device according to the local configuration, or may also be saved for the terminal device according to the distribution information received from the network, or may also be saved for the terminal device according to the distribution information and the local configuration received from the network. Which one is used as the disaster roaming service time when the allocation information and the local configuration received from the network coexist, which is not limited by the present invention based on different implementations of the terminal device. Further optionally, the terminal device determines that the disaster roaming service time is at least one according to the distribution information received from the network, for example, the disaster roaming service time is only one, that is, the disaster roaming service time that the terminal device can obtain is the same for different disaster roaming PLMNs; also for example, the terminal device may obtain different disaster roaming service times for different disaster roaming PLMNs.
S202, the terminal device sends a registration request message to the first PLMN, where the registration request message includes disaster roaming indication information, and the disaster roaming indication information is used to indicate the terminal device to request disaster roaming registration, and correspondingly, the first PLMN receives the registration request message.
Specifically, in this embodiment, the terminal device may send a registration request message to an access management network element of the first PLMN, where the registration request message includes disaster roaming indication information, and the disaster roaming indication information is used to indicate that the terminal device requests to perform disaster roaming registration. That is, the terminal device requests the first PLMN to provide a service, and particularly requests a disaster roaming service.
Optionally, the disaster roaming indication information may be a registration type, or may be a cell, or may be a value field (value field) in the cell.
S203, the first PLMN sends a registration acceptance message to the terminal device, and correspondingly, the terminal device receives the registration acceptance message.
Therefore, by the method for requesting the disaster roaming service from the network by the terminal equipment, the terminal equipment performs disaster roaming under the condition of network service failure caused by disaster, so that the service can be acquired, the service interruption of the terminal equipment is reduced, the service interruption minimization is realized, and the user experience is improved.
Optionally, after the terminal device receives the registration acceptance message, the method 200 further includes the following steps S204 to S206:
and S204, after the terminal equipment receives the registration acceptance message sent by the first PLMN, the terminal equipment performs disaster roaming on the first PLMN within the service time of disaster roaming.
Specifically, in the implementation of the present application, when the terminal device receives the registration acceptance message sent by the first PLMN, indicating that the first PLMN agrees to provide the disaster roaming service for the terminal device, the terminal device may perform disaster roaming through the first PLMN at this time, and the first PLMN provides the service for the terminal device within the service time of the disaster roaming service. After the disaster roaming service time is exceeded, the terminal device will re-execute steps S201-S203, i.e. the terminal device re-performs PLMN selection to leave the first PLMN.
It should be understood that, after the terminal device receives the registration accept message sent by the first PLMN, there may be the following two specific implementation manners for the terminal device to perform disaster roaming on the first PLMN within the disaster roaming service time, although the application is not limited thereto.
The method I comprises the following steps: the terminal equipment starts a timer according to the disaster roaming service time so as to carry out disaster roaming in a time period indicated by the disaster roaming service time, and after the time period is exceeded, the terminal equipment carries out PLMN selection again so as to leave the first PLMN.
The second method comprises the following steps: and the terminal equipment records the time of disaster roaming so as to perform disaster roaming in a time period indicated by the disaster roaming service time, and after the time period is exceeded, the terminal equipment performs PLMN selection again so as to leave the first PLMN.
S205, the terminal device notifies the user that the terminal device is performing disaster roaming.
Specifically, in the embodiment of the present application, the terminal device may output a notification to let the user know that disaster roaming is currently performed.
And S206, before the terminal equipment determines the first PLMN, the terminal equipment knows that the current PLMN providing service stops service due to disaster.
Optionally, for the information of the disaster roaming PLMN stored in the terminal device, before the terminal device learns that the PLMN currently providing the service stops service due to disaster, the terminal device stores the information of the disaster roaming PLMN by performing information interaction with the second PLMN. That is, the present application also proposes a disaster roaming method 300, and a schematic flow chart of the method 300 is shown in fig. 3. It should be understood that the PLMN currently providing the service may be the same as or different from the second PLMN, and the present application does not limit this.
The method 300 includes:
s301, the terminal device sends a first message to the second PLMN, where the first message includes capability information of the terminal device for supporting disaster roaming, and correspondingly, the second PLMN receives the first message.
Specifically, in this embodiment of the present application, the first message is a registration request message, that is, the registration request message includes capability information of the terminal device for supporting disaster roaming.
It should be understood that the capability information of the terminal device supporting the disaster roaming may be the capability information of the terminal device supporting the minimum service interruption MINT, and the two capability information may be used alternatively.
S302, the second PLMN sends a second message to the terminal device, where the second message includes information of the disaster roaming PLMN, and correspondingly, the terminal device receives the second message.
In this embodiment of the present application, the second message may be a registration accept message, or may be a registration reject message, or may also be a downlink non-access stratum NAS transport message, or may also be a configuration update command message.
Optionally, the second message further includes indication information for allowing the terminal device to perform disaster roaming (disaster roaming), where the indication information for allowing the terminal device to perform disaster roaming is used to indicate that the UE can perform disaster roaming when a disaster occurs in a PLMN currently providing a service.
And S303, the terminal equipment stores the information of the disaster roaming PLMN according to the second message.
Alternatively, the terminal device may store the information of the disaster roaming PLMN in a Universal Subscriber Identity Module (USIM), or may also store the information in a non-volatile memory (non-volatile memory) of the terminal device itself.
Therefore, the capability negotiation is carried out between the terminal equipment and the second PLMN, the second PLMN issues the information of the disaster roaming PLMN, and the terminal equipment stores the information of the disaster roaming PLMN, so that the disaster roaming can be executed when a subsequent disaster happens, the service interruption of the terminal equipment is further reduced, the service interruption minimization is realized, and the user experience is improved.
Optionally, the method further includes S304:
and when the second message is a registration rejection message, the terminal equipment stores the identification information of the second PLMN in the information of the disaster roaming PLMN.
Specifically, in this embodiment of the application, when the second message is a registration rejection message, that is, the second PLMN rejects the registration request of the terminal device, the terminal device may mark the second PLMN as a disaster roaming PLMN, and store the identification information of the second PLMN in the information of the disaster roaming PLMN.
The identification information of the second PLMN is stored in the disaster roaming PLMN information, so that the terminal equipment can maintain the original disaster roaming PLMN information, the disaster roaming is executed when the subsequent disaster happens, the service interruption of the terminal equipment is further reduced, the minimum service interruption is realized, and the user experience is improved.
Optionally, the second PLMN may include a first network element and a second network element. The method 300 is described in detail below with reference to schematic flow diagrams of methods 400, 500 shown in fig. 4 and 5, taking a first network element and a second network element as examples.
It should be noted that some steps mentioned below are the same as the above method 300, and details thereof are not repeated here, and specific processes may refer to the steps related to the method 300.
S401, a terminal device sends a first message to a first network element, where the first message includes capability information of the terminal device for supporting disaster roaming, and correspondingly, the first network element receives the first message. The specific process of this step may refer to S301 in the method 300.
S402, the first network element obtains the information of the disaster roaming PLMN providing the disaster roaming service for the terminal equipment according to the capability information supporting the disaster roaming.
For example, in a specific implementation in which the first network element obtains the information of the disaster roaming PLMN, the first network element may be implemented in one or two of the following ways, and certainly is not limited to these ways.
The method I comprises the following steps: and the first network element determines the information of the disaster roaming PLMN according to the local configuration.
In an optional embodiment of the first mode, before the first network element determines the information of the disaster roaming PLMN according to the local configuration, the first network element may perform disaster roaming indication information according to the local configuration or the requirement sent by the second network element, and determine to provide the disaster roaming service for the terminal device. Wherein the disaster roaming instructing information is required to instruct the first network element to execute the disaster roaming service.
The second method comprises the following steps: and the first network element receives the information of the disaster roaming PLMN sent by the second network element.
In an optional embodiment of the second mode, for a process in which the first network element receives information of the disaster roaming PLMN sent by the second network element, the first network element receives indication information that the disaster roaming is required and sent by the second network element, where the indication information that the disaster roaming is required is used to indicate the first network element to execute the disaster roaming service. That is, the indication information that the disaster roaming is required and the information of the disaster roaming PLMN may be transmitted simultaneously, or the indication information that the disaster roaming is required may be transmitted first and then the information of the disaster roaming PLMN may be transmitted.
As to the above second mode, optionally, before the first network element receives the information that the disaster roaming instruction needs to be performed or the information of the disaster roaming PLMN, which is sent by the second network element, the first network element sends the capability information of the terminal device, which supports the disaster roaming, to the second network element.
For a specific implementation of the second mode, reference may be made to the following detailed description of the method 500.
S403, the first network element sends a second message to the terminal device, where the second message includes information of the disaster roaming PLMN, and the terminal device receives the second message, and correspondingly, the terminal device receives the second message. The specific process of this step can refer to S302 in the method 300.
Optionally, the second message further includes indication information for allowing the terminal device to perform disaster roaming.
In the embodiment of the present application, there are three possible situations for the content of the information of the disaster roaming PLMN:
in case one, the information of disaster roaming PLMNs includes identification information of at least one PLMN allowing the terminal device to perform disaster roaming;
case two, the information of the disaster roaming PLMN includes disaster roaming service time;
and in case three, the information of the disaster roaming PLMN comprises identification information of at least one PLMN allowing the terminal equipment to carry out disaster roaming and disaster roaming service time.
And S404, the terminal equipment stores the information of the disaster roaming PLMN according to the second message. The specific process of this step may refer to S303 in the method 300.
Therefore, the capability negotiation is carried out between the terminal equipment and the first network element, the first network element issues the information of the disaster roaming PLMN, and the terminal equipment stores the information of the disaster roaming PLMN, so that the disaster roaming can be executed when a subsequent disaster happens, the service interruption of the terminal equipment is further reduced, the service interruption minimization is realized, and the user experience is improved.
Fig. 5 is a flow chart illustrating a method 500 for disaster roaming provided by the present application. The method 500 includes:
s501, the first network element sends the capability information of the terminal device for supporting the disaster roaming to the second network element, and correspondingly, the second network element receives the capability information of the terminal device for supporting the disaster roaming.
And S502, the second network element determines to allow the terminal equipment to obtain the disaster roaming service according to the capability information of the terminal equipment for supporting the disaster roaming.
In this embodiment, the second network element determines to allow the terminal device to obtain the disaster roaming service according to the capability information of the terminal device for supporting the disaster roaming and the local configuration.
S503, the second network element sends the information of the disaster roaming PLMN of the terminal device to the first network element, and correspondingly, the first network element receives the information of the disaster roaming PLMN of the terminal device.
Specifically, in this embodiment, after determining, by the second network element, information of a disaster roaming PLMN of the terminal device according to the local configuration, the second network element sends the information of the disaster roaming PLMN to the first network element.
Optionally, the second network element may further send instruction information that disaster roaming is required to be performed to the first network element, where the instruction information that disaster roaming is required to be performed is used to instruct the first network element to execute a disaster roaming service.
In the embodiment of the present application, there are three possible situations for the content of the information of the disaster roaming PLMN as described above:
in case one, the information of the disaster roaming PLMN includes identification information of at least one PLMN that allows the terminal device to perform disaster roaming;
case two, the information of the disaster roaming PLMN includes disaster roaming service time;
and in case three, the information of the disaster roaming PLMN comprises identification information of at least one PLMN allowing the terminal equipment to carry out disaster roaming and disaster roaming service time.
It should be understood that for the "local configuration" mentioned in the above methods 400 and 500, the local configuration may be an operator policy, or may be a network configuration, or may also be an operator policy and a network configuration.
It should also be understood that, for the terminal device executing the method, the terminal device may also be a chip or a chip system disposed in the terminal device; for the first network element executing the method, the first network element may also be a chip or a chip system set in the first network element; for the second network element executing the method, the second network element may also be a chip or a chip system disposed in the second network element; the embodiments of the present application do not limit this. The chip system may include an input interface, an output interface, at least one processor, and a memory, the input interface, the output interface, the processor, and the memory communicate with each other through an internal connection path, and the processor is configured to execute codes in the memory.
Therefore, the first network element performs capability negotiation with the second network element by reporting the capability information of the terminal device, and the second network element issues the information of the disaster roaming PLMN, so that the terminal device stores the information of the disaster roaming PLMN, thereby ensuring that the disaster roaming is executed when a subsequent disaster occurs, further reducing the service interruption of the terminal device, realizing the minimization of the service interruption, and improving the user experience.
Optionally, for the terminal device, the first network element, and the second network element in the foregoing method, the terminal device may be a UE, the first network element may be an AMF, and the second network element may be a UDM.
To facilitate understanding of the methods 300, 400, and 500 for disaster roaming provided in the present application, the following takes, as an example and not as a limitation, a terminal device as a UE, a first network element as an AMF, and a second network element as a UDM, and various implementations of the methods are described in detail with reference to the following methods 600, 700, 800, 900, and 1000, respectively.
It should be noted that some steps mentioned below are the same as the above methods 300, 400, and 500, and details thereof are not repeated here, and specific processes may refer to the relevant steps in the above methods.
Fig. 6 is a schematic flow chart diagram illustrating a specific example method 600 of a method for disaster roaming provided herein.
S601, the UE sends a first message to the AMF, where the first message includes capability information of the UE for supporting disaster roaming, and accordingly, the AMF receives the first message. The specific process of this step may refer to S301 in the method 300.
The AMF determines to provide disaster roaming service for the UE according to the local configuration S602.
And S603, the AMF determines the information of the disaster roaming PLMN according to the local configuration.
S604, the AMF sends a second message to the UE, where the second message includes information of the disaster roaming PLMN, and accordingly, the UE receives the second message. The specific process of this step can refer to S302 in the method 300.
S605, the UE stores the information of the disaster roaming PLMN according to the second message. The specific process of this step may refer to S303 in the method 300.
Fig. 7 is a schematic flow chart diagram illustrating a specific example method 700 of a method for disaster roaming provided herein.
S701, the UE sends a first message to the AMF, where the first message includes capability information of the UE for supporting the disaster roaming, and the AMF receives the first message accordingly. The specific process of this step may refer to S301 in the method 300.
S702, the AMF sends the capability information supporting the disaster roaming of the UE to the UDM, and accordingly, the UDM receives the capability information supporting the disaster roaming of the UE.
And S703, the UDM determines to allow the UE to acquire the disaster roaming service according to the capability information of the UE for supporting the disaster roaming and the local configuration.
S704, the UDM determines information of the disaster roaming PLMN of the UE according to the local configuration.
S705, the UDM sends information of the disaster roaming PLMN of the UE to the AMF, and accordingly, the AMF receives the information of the disaster roaming PLMN of the UE.
Specifically, in one implementation, the UDM encapsulates the information of the disaster roaming PLMN in a container (container) and passes it through the AMF to the UE. The container is transparent to the AMF and invisible.
S706, the AMF sends a second message to the UE, where the second message includes information of the disaster roaming PLMN, and accordingly, the UE receives the second message. The specific process of this step can refer to S302 in the method 300.
And S707, the UE stores the information of the disaster roaming PLMN according to the second message. The specific process of this step may refer to S303 in the method 300.
Fig. 8 is a schematic flow chart diagram illustrating a specific example method 800 of a method for disaster roaming provided herein.
S801, the UE sends a first message to the AMF, where the first message includes capability information of the UE for supporting the disaster roaming, and accordingly, the AMF receives the first message. The specific process of this step may refer to S301 in the method 300.
S802, the AMF sends the capability information of the UE for supporting the disaster roaming to the UDM, and accordingly, the UDM receives the capability information of the UE for supporting the disaster roaming.
And S803, the UDM determines to allow the UE to acquire the disaster roaming service according to the capability information of the UE for supporting the disaster roaming and the local configuration.
S804, the UDM sends indication information which needs disaster roaming to the AMF, the indication information which needs disaster roaming is used for indicating the AMF to execute disaster roaming service, and correspondingly, the AMF receives the indication information which needs disaster roaming.
The AMF determines information of the disaster roaming PLMN according to the local configuration S805.
S806, the AMF sends a second message to the UE, where the second message includes information of the disaster roaming PLMN, and accordingly, the UE receives the second message. The specific process of this step may refer to S302 in the method 300.
And S807, the UE stores the information of the disaster roaming PLMN according to the second message. The specific process of this step may refer to S303 in the method 300.
Fig. 9 is a schematic flow chart diagram illustrating a specific example method 900 of a method for disaster roaming provided herein.
S901, the UE sends a first message to the AMF, where the first message includes capability information of the UE for supporting the disaster roaming, and the AMF receives the first message accordingly. The specific process of this step may refer to S301 in the method 300.
S902, the AMF sends the capability information supporting the disaster roaming of the UE to the UDM, and accordingly, the UDM receives the capability information supporting the disaster roaming of the UE.
And S903, the UDM determines to allow the UE to acquire the disaster roaming service according to the capability information of the UE supporting the disaster roaming and the local configuration.
S904, the UDM sends the indication information that the disaster roaming is required to be performed to the AMF, where the indication information that the disaster roaming is required to be performed is used to instruct the AMF to perform the disaster roaming service, and correspondingly, the AMF receives the indication information that the disaster roaming is required to be performed.
S905, the AMF sends a second message to the UE, where the second message includes indication information allowing the terminal device to perform disaster roaming, and accordingly, the UE receives the second message. The specific process of this step can refer to S302 in the method 300.
S906, the UDM determines information of the disaster roaming PLMN of the UE according to the local configuration.
S907, the UDM sends a third message to the AMF, the third message including information of the disaster roaming PLMN, and accordingly, the AMF receives the third message.
In this embodiment of the application, the step S907 may be a service operation (service operation) for a subscription data management notification (subscription data management notification) provided by the UDM.
Specifically, when the second message in S905 is a registration accept message, that is, the UE registration is successful, step S907 is a UDM UE parameter update (UE parameters update) procedure initiated by the UDM, and the UDM encapsulates the information of the disaster roaming PLMN in a container (container) in the third message, and passes the information through the AMF to the UE. The container is transparent to the AMF and invisible.
S908, the AMF sends a fourth message, which includes information of the disaster roaming PLMN, and accordingly, the UE receives the fourth message.
Specifically, in this embodiment, the fourth message includes a container received from the third message in step S907, the container includes information of the disaster roaming PLMN,
in this embodiment of the present application, the fourth message may be a downlink non-access stratum NAS transport message, or may also be a configuration update command message.
And S909, the UE stores the information of the disaster roaming PLMN according to the fourth message.
Specifically, in this embodiment, the UE includes the information of the disaster roaming PLMN according to the information of the disaster roaming PLMN included in the fourth message.
The specific process of this step may refer to S303 in the method 300, wherein "second message" may be replaced with "fourth message".
Fig. 10 is a schematic flow chart diagram illustrating a specific example method 1000 of a method for disaster roaming provided herein.
S1001, the UE sends a first message to the AMF, where the first message includes capability information of the UE for supporting the disaster roaming, and accordingly, the AMF receives the first message. The specific process of this step may refer to S301 in the method 300.
S1002, the AMF sends the capability information of the UE for supporting the disaster roaming to the UDM, and accordingly, the UDM receives the capability information of the UE for supporting the disaster roaming.
And S1003, the UDM determines to allow the UE to acquire the disaster roaming service according to the capability information of the UE for supporting the disaster roaming and the local configuration.
S1004, the UDM sends indication information that the disaster roaming is required and the disaster roaming service time to the AMF, where the indication information that the disaster roaming is required is used to indicate the AMF to execute the disaster roaming service, and accordingly, the AMF receives the indication information that the disaster roaming is required and the disaster roaming service time.
S1005, the AMF sends a second message to the UE, where the second message includes indication information allowing the terminal device to perform disaster roaming and disaster roaming service time, and accordingly, the AMF receives the second message.
Specifically, the second message is a registration rejection message. I.e. when the network rejects the registration request of the UE.
The specific process of this step can refer to S302 in the method 300.
S1006, the UE stores the information of the disaster roaming PLMN according to the second message.
Specifically, after the network rejects the registration request of the UE, the UE may mark the network as a disaster roaming PLMN and store the identification information and the disaster roaming service time of the network.
The specific process of this step may refer to S303 in the method 300.
In addition to the above, the present application provides another method 1100 of disaster roaming.
Fig. 11 is a schematic flow chart diagram illustrating another method 1100 for disaster roaming provided herein. The method comprises the following steps:
s1101, the third PLMN transmits system information to the terminal device, where the system information includes indication information allowing disaster roaming, and accordingly, the terminal device receives the system information.
It should be appreciated that the third PLMN is a PLMN that may provide disaster roaming services for the terminal device.
It should be understood that, in the embodiment of the present application, due to the influence of the disaster, after the PLMN providing the service for the terminal device before the disaster occurs stops the service due to the disaster, the PLMN providing the service for the terminal device before the disaster occurs may send the identification information and the location area information of the disaster to the available disaster roaming PLMN. Thus, an available disaster roaming PLMN will obtain identification information of PLMNs that are out of service in case of disaster. It should also be appreciated that an existing standardized or proprietary interface may exist between the PLMN serving the terminal device prior to the occurrence of the disaster and the available disaster roaming PLMNs, so that messages may be interworked between the two PLMNs.
Specifically, in the embodiment of the present application, the third PLMN broadcasts system information including identification information of a PLMN which has ceased to provide service in the event of a disaster and indication information that disaster roaming is permitted. Namely, the terminal equipment can know whether the PLMN which stops providing service due to disaster is the PLMN which provides service for the terminal equipment; and the indication information of allowing the disaster roaming is used for the terminal device to know that the third PLMN can provide the disaster roaming service for the terminal device, so the terminal device may proceed to the next operation S602.
S1102, the terminal device sends a registration request message to a third PLMN according to the system information, where the registration request message includes capability information of the terminal device for supporting disaster roaming and disaster roaming indication information, and correspondingly, the third PLMN receives the registration request message.
It should be appreciated that the capability information of the terminal device to support disaster roaming may be the capability information of the terminal device to support the minimum service interruption MINT. It should also be understood that the disaster roaming indication information is used to indicate that the terminal device requests disaster roaming registration.
Specifically, in this embodiment of the present application, the terminal device may perform cell scanning, select a cell with a strongest signal to perform physical camping, and read system information broadcast by the selected cell to know that the third PLMN is available in the currently selected cell.
S1103, the third PLMN sends a registration acceptance message to the terminal device, where the registration acceptance message includes the disaster roaming service time provided by the third PLMN, and accordingly, the terminal device receives the registration acceptance message.
Therefore, after a disaster occurs, the terminal device receives and reads the system information broadcast by the third PLMN, and then selects the third PLMN to perform disaster roaming, so that a service can be acquired, service interruption of the terminal device is reduced, service interruption minimization is realized, and user experience is improved.
Optionally, the method further comprises steps S1104-S1107.
And S1104, the terminal equipment performs disaster roaming on the third PLMN within the service time of the disaster roaming.
It should be understood that, after receiving the registration acceptance message, the terminal device may provide the disaster roaming service to the terminal device by including the disaster roaming service time in the registration acceptance message, that is, the disaster roaming service time is the PLMN that the third PLMN can provide the disaster roaming service to the terminal device.
S1105, the terminal device notifies the user that the terminal device is performing disaster roaming.
Specifically, in the embodiment of the present application, the terminal device may output a notification to let the user know that disaster roaming is currently performed.
And S1106, before the terminal equipment receives the system information sent by the third PLMN, the terminal equipment learns that the fourth PLMN stops service due to disaster, and the fourth PLMN provides service for the terminal equipment before the disaster occurs.
S1107, after the terminal device learns that the fourth PLMN is out of service due to disaster, the terminal device obtains information of available PLMNs in the current location area, and selects a PLMN in the at least one PLMN as the third PLMN from the available PLMNs.
Specifically, in this embodiment of the present application, the terminal device may perform cell scanning, select a cell with a strongest signal to perform physical camping, and read system information broadcast by the selected cell to know that the third PLMN is available in the currently selected cell.
Optionally, for the system information, the system information may include identification information of the fourth PLMN.
It should be appreciated that, alternatively to the method 1100 described above, the third PLMN may further be an access network device, e.g., RAN, in the third PLMN, and the terminal device may be a UE.
It should also be understood that, for the terminal device executing the method, it may also be a chip or a chip system disposed in the terminal device; for the third PLMN executing the method, the third PLMN may also be a chip or a chip system disposed on the third PLMN; the embodiments of the present application do not limit this. The chip system may include an input interface, an output interface, at least one processor, and a memory, the input interface, the output interface, the processor, and the memory communicate with each other through an internal connection path, and the processor is configured to execute codes in the memory.
Fig. 12 and 13 are schematic structural diagrams of a possible disaster roaming apparatus according to an embodiment of the present application. The devices can realize the functions of the terminal equipment or any network element in the above method embodiments, so that the beneficial effects of the above method embodiments can also be realized. In this embodiment of the present application, the apparatus may be a terminal device, a first network element, a second network element, or a module (e.g., a chip) applied to the terminal device, the first network element, or the second network element.
Fig. 12 is a schematic block diagram of a disaster roaming apparatus 1200 according to an embodiment of the present application, where the apparatus 1200 may include a transceiver unit 1201 and a processing unit 1202.
When the apparatus 1200 is configured to implement the functions of the terminal device in the method embodiments shown in fig. 2 or fig. 3, the processing unit is configured to determine a first PLMN according to the stored information of disaster roaming public land mobile networks PLMN, where the information of the disaster roaming PLMN includes identification information of at least one PLMN that allows disaster roaming of the terminal device, and the first PLMN is a PLMN in the at least one PLMN; the transceiver unit is configured to send a registration request message to the first PLMN, where the registration request message includes disaster roaming indication information, and the disaster roaming indication information is used to indicate the terminal device to request for disaster roaming registration; the transceiver unit is further configured to receive a registration accept message sent by the first PLMN.
When the apparatus 1200 is used to implement the function of the first network element in the method embodiment shown in fig. 4, the transceiver unit is configured to receive a first message sent by a terminal device, where the first message includes capability information of the terminal device that supports disaster roaming; the processing unit is used for acquiring information of a disaster roaming PLMN (public land Mobile network) for providing disaster roaming service for the terminal equipment according to the capability information supporting disaster roaming; the transceiver unit is further configured to send a second message to the terminal device, where the second message includes information of the disaster roaming PLMN.
When the apparatus 1200 is configured to implement the function of the second network element in the embodiment of the method in fig. 5, the transceiver unit is configured to receive capability information of a terminal device supporting disaster roaming, which is sent by the first network element; the processing unit is used for determining to allow the terminal equipment to obtain disaster roaming service according to the capability information of the terminal equipment for supporting the disaster roaming; the transceiver unit is further configured to send information of the disaster roaming PLMN of the terminal device to the first network element.
When the apparatus 1200 is used to implement the function of the terminal device in the method embodiment shown in fig. 11, the transceiver unit is configured to receive system information sent by the third PLMN, where the system information includes indication information that disaster roaming is allowed; the transceiver unit is further configured to send a registration request message to the third PLMN according to the system information, where the registration request message includes disaster roaming support capability information and disaster roaming indication information of the terminal device; the transceiver unit is further configured to receive a registration accept message sent by the third PLMN, where the registration accept message includes disaster roaming service time provided by the third PLMN.
For more detailed description of the transceiving unit 1201 and the processing unit 1202, reference may be made to the related description in the above method embodiments, and no further description is made here.
Fig. 13 shows a schematic block diagram of an apparatus 1300 to which embodiments of the present application are applied. Any network element involved in any of the methods 200 to 1100 described above may be implemented by the apparatus shown in fig. 13.
It is to be appreciated that apparatus 1300 may be a physical device, a component of a physical device (e.g., an integrated circuit, a chip, etc.), or a functional block in a physical device.
As shown in fig. 13, the apparatus 1300 includes: one or more processors 1301. The processor 1301 may store execution instructions for performing the methods of the embodiments of the present application. Optionally, an interface may be called in the processor 1301 to implement the receiving and sending functions. The interface may be a logical interface or a physical interface, which is not limited in this regard. For example, the interface may be a transceiver circuit, or an interface circuit. The transceiver circuitry, or interface circuitry, used to implement the receive and transmit functions may be separate or integrated. The transceiver circuit or the interface circuit may be used for reading and writing code/data, or the transceiver circuit or the interface circuit may be used for transmitting or transferring signals.
Alternatively, the interface may be implemented by a transceiver. Optionally, the apparatus 1300 may further include a transceiver 1303. The transceiver 1303 may be referred to as a transceiving unit, a transceiver, a transceiving circuit, a transceiver, or the like, and is used for implementing a transceiving function.
Optionally, the apparatus 1300 may further include a memory 1302. The embodiment of the present application does not specifically limit the specific deployment location of the memory 1302, and the memory may be integrated into the processor or may be independent from the processor. For the case where the apparatus 1300 does not include memory, the apparatus 1300 may have processing functionality, and the memory may be deployed elsewhere (e.g., in a cloud system).
The processor 1301, the memory 1302 and the transceiver 1303 communicate with each other via internal connection paths to transfer control and/or data signals.
It is understood that although not shown, the device 1300 may also include other devices, such as an input device, an output device, a battery, etc.
Optionally, in some embodiments, the memory 1302 may store instructions for performing the methods of embodiments of the present application. The processor 1301 may execute the instructions stored in the memory 1302 to perform the steps performed by the method described below in conjunction with other hardware (e.g., the transceiver 1303), and the specific working process and beneficial effects can be found in the description of the method embodiments below.
The method disclosed in the embodiments of the present application may be applied to the processor 1301, or implemented by the processor 1301. Processor 1301 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in a Random Access Memory (RAM), a flash memory, a read-only memory (ROM), a programmable ROM, an electrically erasable programmable memory, a register, or other storage medium known in the art. The storage medium is located in a memory, and a processor reads instructions in the memory and combines hardware thereof to complete the steps of the method.
It will be appreciated that the memory 1302 can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory ROM, a programmable read-only memory (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be random access memory, RAM, which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
In addition, in the present application, the apparatus 1200 is presented in the form of a functional module. As used herein, a "module" may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other devices that may provide the described functionality. In a simple embodiment, those skilled in the art will appreciate that the apparatus 1200 may take the form shown in FIG. 12. The processing unit 1201 may be implemented by the processor 1301 illustrated in fig. 13. Alternatively, if the computer device shown in fig. 13 includes the memory 1302, the processing unit 1202 may be implemented by the processor 1301 and the memory 1302. The transceiving unit 1201 may be implemented by the transceiver 1303 illustrated in fig. 13. The transceiver 1303 includes a receiving function and a transmitting function. In particular, the processor is implemented by executing a computer program stored in the memory. Alternatively, when the apparatus 1200 is a chip, the functions and/or implementation procedures of the transceiving unit 1201 can also be implemented by pins, circuits or the like. Alternatively, the memory may be a storage unit in the chip, such as a register, a cache, or the like, and the storage unit may also be a storage unit in the computer device that is located outside the chip, such as the memory 1302 in fig. 13, or may also be a storage unit disposed in another system or device, which is not in the computer device. Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
Various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media can include but are not limited to magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips, etc.), optical disks (e.g., Compact Disk (CD), Digital Versatile Disk (DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), card, stick, or key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.
The present application also provides a computer-readable medium having stored thereon a computer program which, when executed by a computer, performs the functions of any of the method embodiments described above.
The present application also provides a computer program product which, when executed by a computer, implements the functionality of any of the above-described method embodiments. In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.
It should be appreciated that reference throughout this specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the various embodiments are not necessarily referring to the same embodiment throughout the specification. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
It should also be understood that, in the present application, "when …", "if" and "if" all refer to the fact that the UE or the base station will perform the corresponding processing under certain objective conditions, and are not limited time, and do not require the UE or the base station to perform certain judgment actions, nor do they mean that there are other limitations.
Additionally, the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone.
Herein, the term "at least one of … …" or "at least one of … …" means all or any combination of the listed items, e.g., "at least one of A, B and C", may mean: there are six cases of a alone, B alone, C alone, a and B together, B and C together, and A, B and C together.
In this application, unless otherwise specified, "at least one" means one or more, and "a plurality" means two or more.
It should be understood that in the embodiments of the present application, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also be determined from a and/or other information.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions may be stored in a computer-readable storage medium if they are implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (41)

1. A method of disaster roaming performed in a terminal device, comprising:
determining a first PLMN according to stored information of disaster roaming Public Land Mobile Networks (PLMNs), wherein the information of the disaster roaming PLMN comprises identification information of at least one PLMN allowing terminal equipment to perform disaster roaming, and the first PLMN is a PLMN in the at least one PLMN;
sending a registration request message to the first PLMN, wherein the registration request message comprises disaster roaming indication information, and the disaster roaming indication information is used for indicating the terminal equipment to request for disaster roaming registration;
and receiving a registration acceptance message sent by the first PLMN.
2. The method of claim 1, wherein the information of the disaster roaming PLMN further comprises disaster roaming service time.
3. The method according to claim 1 or 2, wherein after said receiving registration acceptance information sent by said first PLMN, said method further comprises:
disaster roaming is performed at the first PLMN during the disaster roaming service time.
4. The method according to any one of claims 1-3, further comprising:
notifying the user that the terminal device is undergoing disaster roaming.
5. The method of any of claims 1-4, wherein determining the first PLMN comprises:
obtaining information of available PLMNs in a current location area, and selecting a PLMN in the at least one PLMN from the available PLMNs as the first PLMN.
6. The method of any of claims 1-5, wherein prior to said determining the first PLMN, the method further comprises:
and obtaining that the current PLMN providing service stops service due to disaster.
7. The method according to any of claims 1-6, wherein before the obtaining that the currently serving PLMN is out of service due to disaster, the method further comprises:
sending a first message to a second PLMN, the first message comprising capability information of the terminal device to support disaster roaming;
receiving a second message sent by the second PLMN, wherein the second message comprises information of a disaster roaming PLMN;
and storing the information of the disaster roaming PLMN according to the second message.
8. The method of claim 7, wherein the first message is a registration request message.
9. The method of claim 7, wherein the second message is any one of:
a registration accept message, a registration reject message, a downlink non-access stratum NAS transport message, or a configuration update command message.
10. The method of any of claims 7-9, wherein the second message further comprises indication information to allow disaster roaming by the terminal device.
11. The method according to any of claims 7-10, wherein when the second message is registration rejection information, the method further comprises:
and storing the identification information of the second PLMN in the information of the disaster roaming PLMN.
12. A method of disaster roaming performed in a first network element, comprising:
receiving a first message sent by a terminal device, wherein the first message comprises capability information of the terminal device for supporting disaster roaming;
acquiring disaster roaming PLMN information for providing disaster roaming service for the terminal equipment according to the capability information supporting disaster roaming;
and sending a second message to the terminal equipment, wherein the second message comprises the information of the disaster roaming PLMN.
13. The method of claim 12, wherein the first message is a registration request message.
14. The method of claim 12, wherein the second message is any one of:
a registration accept message, a registration reject message, a downlink non-access stratum NAS transport message, or a configuration update command message.
15. The method of any of claims 12-14, wherein the second message further comprises indication information that allows disaster roaming for the terminal device.
16. The method of claim 12, wherein obtaining information about a disaster roaming PLMN that provides disaster roaming services for the terminal device comprises:
and determining the information of the disaster roaming PLMN according to local configuration.
17. The method of claim 16, wherein prior to the determining the information of the disaster roaming PLMN according to a local configuration, the method further comprises:
and determining to provide disaster roaming service for the terminal equipment according to the local configuration.
18. The method of claim 16, wherein prior to the determining the information of the disaster roaming PLMN according to a local configuration, the method further comprises:
and receiving indication information which is sent by a second network element and needs to perform disaster roaming, wherein the indication information which needs to perform disaster roaming is used for indicating the first network element to execute disaster roaming service.
19. The method of claim 12, wherein obtaining information about a disaster roaming PLMN that provides disaster roaming services for the terminal device comprises:
and receiving the information of the disaster roaming PLMN sent by the second network element.
20. The method of claim 19, wherein the receiving information of the disaster roaming PLMN sent by the second network element, the method further comprising:
and receiving indication information which is sent by the second network element and needs to carry out disaster roaming, wherein the indication information which needs to carry out disaster roaming is used for indicating the first network element to execute disaster roaming service.
21. The method according to claim 18 or 19, wherein before receiving the information of indication that disaster roaming is required or the information of the disaster roaming PLMN sent by the second network element, the method further comprises:
and sending the capability information of the terminal equipment for supporting disaster roaming to the second network element.
22. The method of any of claims 12-21, wherein the information of the disaster roaming PLMN comprises:
identification information of at least one PLMN that allows disaster roaming by said terminal device; alternatively, the first and second electrodes may be,
disaster roaming service time; alternatively, the first and second electrodes may be,
identification information of at least one PLMN allowing disaster roaming by said terminal device and disaster roaming service time.
23. A method of disaster roaming performed in a second network element, comprising:
receiving capability information of terminal equipment for supporting disaster roaming, which is sent by a first network element;
determining to allow the terminal equipment to obtain disaster roaming service according to the capability information of the terminal equipment supporting the disaster roaming;
and sending information of the disaster roaming PLMN of the terminal equipment to the first network element.
24. The method of claim 23, further comprising: and sending indication information needing disaster roaming to the first network element, wherein the indication information needing disaster roaming is used for indicating the first network element to execute disaster roaming service.
25. The method of claim 23 or 24, wherein the determining to allow the terminal device to obtain disaster roaming services comprises:
and determining to allow the terminal equipment to obtain disaster roaming service according to the capability information of the terminal equipment supporting the disaster roaming and the local configuration.
26. The method according to any of claims 23-25, wherein before said sending information of the disaster roaming PLMN of the terminal device to the first network element, the method further comprises:
and determining information of the disaster roaming PLMN of the terminal equipment according to local configuration.
27. The method of any of claims 23-26, wherein the information about the disaster roaming PLMN comprises:
identification information of at least one PLMN that allows disaster roaming by said terminal device; alternatively, the first and second electrodes may be,
disaster roaming service time; alternatively, the first and second electrodes may be,
identification information of at least one PLMN allowing disaster roaming by the terminal device and disaster roaming service time.
28. A method of disaster roaming performed in a terminal device, comprising:
receiving system information sent by a third PLMN, wherein the system information comprises indication information allowing disaster roaming;
according to the system information, sending a registration request message to the third PLMN, wherein the registration request message comprises the capability information of terminal equipment for supporting disaster roaming and disaster roaming indication information;
and receiving a registration acceptance message sent by the third PLMN, wherein the registration acceptance message comprises disaster roaming service time provided by the third PLMN.
29. The method of claim 28, further comprising:
disaster roaming is performed at the third PLMN during the disaster roaming service time.
30. The method of claim 28 or 29, further comprising:
notifying the user that the terminal device is undergoing disaster roaming.
31. The method of any of claims 28-30, wherein prior to said receiving system information transmitted by the third PLMN, the method further comprises:
and obtaining that the fourth PLMN stops service due to disaster, wherein the fourth PLMN is the PLMN which provides service for the terminal equipment before disaster happens.
32. The method of claim 31, wherein after learning that the fourth PLMN is out of service due to disaster, the method further comprises:
and acquiring information of available PLMNs in a current location area, and selecting a PLMN in the at least one PLMN from the available PLMNs as the third PLMN.
33. The method according to any of claims 28-32, wherein said system information further comprises identification information of said fourth PLMN.
34. A disaster roaming device for performing the method of any one of claims 1 to 11; alternatively, the first and second electrodes may be,
for performing the method of any one of claims 12-22; alternatively, the first and second liquid crystal display panels may be,
for performing the method of any one of claims 23-27; alternatively, the first and second liquid crystal display panels may be,
for performing the method of any one of claims 28-33.
35. A system for disaster roaming, the system comprising a first network element, a second network element;
the first network element is used for sending the capability information of the terminal equipment for supporting disaster roaming;
the second network element is configured to receive capability information of the terminal device for supporting disaster roaming;
the second network element is further configured to determine to allow the terminal device to obtain a disaster roaming service according to the capability information of the terminal device for supporting disaster roaming;
the second network element is further configured to send information of a disaster roaming PLMN of the terminal device;
the first network element is further configured to receive information of a disaster roaming PLMN of the terminal device.
36. The system of claim 35, wherein the second network element is further configured to send an indication that disaster roaming is required;
the first network element is further configured to receive the indication information that the disaster roaming is required to be performed;
wherein, the indication information of the disaster roaming requirement is used for indicating the first network element to execute the disaster roaming service.
37. The system according to claim 35 or 36, wherein the second network element is configured to determine that the terminal device is allowed to obtain the disaster roaming service, and the second network element is specifically configured to:
and determining to allow the terminal equipment to obtain disaster roaming service according to the capability information of the terminal equipment for supporting the disaster roaming and the local configuration.
38. The system according to any of claims 35-37, wherein before said second network element is configured to send information of a disaster roaming PLMN for said terminal device, said second network element is further configured to:
and determining information of the disaster roaming PLMN of the terminal equipment according to local configuration.
39. The system according to any of claims 35-38, wherein the information of the disaster roaming PLMN comprises:
identification information of at least one PLMN allowing disaster roaming by said terminal device; alternatively, the first and second electrodes may be,
disaster roaming service time; alternatively, the first and second liquid crystal display panels may be,
identification information of at least one PLMN allowing disaster roaming by said terminal device and disaster roaming service time.
40. A computer-readable storage medium, characterized in that it stores a computer program which, when executed, implements the method of any one of claims 1-11; alternatively, the first and second electrodes may be,
implementing the method of any one of claims 12-22; alternatively, the first and second electrodes may be,
implementing the method of any one of claims 23-27; alternatively, the first and second electrodes may be,
implementing the method of any one of claims 28-33.
41. A chip, comprising: a processor for reading instructions stored in a memory, which when executed by the processor, cause the chip to carry out the method of any of claims 1 to 33.
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