WO2021134175A1 - 一种漫游的方法、装置及系统 - Google Patents

一种漫游的方法、装置及系统 Download PDF

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Publication number
WO2021134175A1
WO2021134175A1 PCT/CN2019/129833 CN2019129833W WO2021134175A1 WO 2021134175 A1 WO2021134175 A1 WO 2021134175A1 CN 2019129833 W CN2019129833 W CN 2019129833W WO 2021134175 A1 WO2021134175 A1 WO 2021134175A1
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WO
WIPO (PCT)
Prior art keywords
plmn
access
terminal device
information
indication information
Prior art date
Application number
PCT/CN2019/129833
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English (en)
French (fr)
Inventor
朱方园
李岩
刘建宁
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2019/129833 priority Critical patent/WO2021134175A1/zh
Priority to EP19958640.5A priority patent/EP4064763A4/en
Priority to CN201980103216.1A priority patent/CN114846853A/zh
Publication of WO2021134175A1 publication Critical patent/WO2021134175A1/zh
Priority to US17/851,226 priority patent/US20220330005A1/en

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    • 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
    • H04W60/06—De-registration or detaching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • 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
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/12—Mobility data transfer between location registers or mobility servers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a roaming method, device, and system.
  • HPLMN Home Public Land Mobile Network
  • the terminal device cannot access the HPLMN.
  • HPLMN Public Land Mobile Network
  • the current technology does not provide a method for terminal equipment to access other operators' networks.
  • the embodiments of the present application provide a roaming method, device, and system, which enable the device to access other operator networks in the failure area when the HPLMN corresponding to the terminal device fails.
  • an embodiment of the present application provides a roaming method including: when a terminal device cannot access a first PLMN, the terminal device accesses a second PLMN, and the communication between the second PLMN and the first PLMN The dynamic roaming protocol is activated; the terminal device receives indication information from the second PLMN, where the indication information is used to indicate the deactivation of the dynamic roaming protocol between the second PLMN and the first PLMN; the terminal The device sends an access request message to the first PLMN according to the instruction information.
  • the receiving, by the terminal device, the indication information from the second PLMN includes: receiving, by the terminal device, a broadcast message from the second PLMN, the broadcast message including the indication information .
  • the broadcast message further includes identification information of the first PLMN, and/or area information of the second PLMN that is not allowed to be accessed by the terminal device.
  • the method further includes: deregistering the terminal device in the second PLMN.
  • the terminal device receiving the indication information from the second PLMN includes: the terminal device receives a de-registration request message from the second PLMN, and the de-registration request message includes The instruction information.
  • the deregistration request message further includes area information in which the terminal device is not allowed to access the second PLMN.
  • the method further includes: before the terminal device accesses the second PLMN, the terminal device receives a message from the second PLMN for instructing the second PLMN to communicate with the second PLMN.
  • the method further includes: before the terminal device accesses the second PLMN, the terminal device obtains information of the second PLMN.
  • the information of the second PLMN further includes at least one of the following information: the type of access technology that allows the terminal device to access the second PLMN, and the type of access technology that allows the terminal device to access the second PLMN; Enter the area information of the second PLMN and the priority information of the second PLMN.
  • an embodiment of the present application provides a roaming method that includes: when a terminal device cannot access a first PLMN, a core network element in the second PLMN obtains first indication information, where the first indication information is used to indicate Activate a dynamic roaming agreement between the second PLMN and the first PLMN; the core network element sends the first indication information to the terminal device.
  • the core network element acquiring the first indication information includes: the core network element acquiring a first notification message, and the first notification message includes the first indication information.
  • the first notification message further includes information of the first PLMN, and the information of the first PLMN includes identification information of the first PLMN.
  • the first notification message further includes at least one of the following information: the type of access technology that allows the terminal device to access the second PLMN, and the type of access technology that allows the terminal device to access Area information of the second PLMN and priority information of the second PLMN.
  • the method further includes: the core network element determines the access network device according to the area information allowing the terminal device to access the second PLMN, wherein The access network device is located in the area where the terminal device is allowed to access the second PLMN.
  • the core network element is an access management network element
  • the core network element acquiring the first notification message includes: the access management network element passes through the second The network opening function network element in the PLMN obtains the first notification message from the network management network element.
  • the method further includes: the core network element acquiring second indication information, where the second indication information is used to instruct to deactivate the second PLMN and the first PLMN The core network element sends the second indication information to the terminal device through the access network device.
  • an embodiment of the present application provides a communication device, including: a processing unit, configured to connect the communication device to a second PLMN when the communication device cannot access a first PLMN, and the second PLMN
  • the dynamic roaming agreement with the first PLMN is activated;
  • the receiving unit is configured to receive indication information from the second PLMN, where the indication information is used to indicate the relationship between the second PLMN and the first PLMN
  • the inter-dynamic roaming protocol is deactivated;
  • the sending unit is configured to send an access request message to the first PLMN according to the instruction information.
  • the communication device may be a terminal device.
  • an embodiment of the present application provides a communication device, including: a receiving unit, configured to obtain first indication information when a terminal device cannot access a first PLMN, where the first indication information is used to indicate activation of a second PLMN A dynamic roaming protocol between the PLMN and the first PLMN, the communication device is a device in the second PLMN; and the sending unit is configured to send the first indication information to the terminal device.
  • the receiving unit is configured to obtain a first notification message, and the first notification message includes the first indication information.
  • the first notification message further includes information of the first PLMN, and the information of the first PLMN includes identification information of the first PLMN.
  • the first notification message further includes at least one of the following information: the type of access technology that allows the terminal device to access the second PLMN, and the type of access technology that allows the terminal device to access Area information of the second PLMN and priority information of the second PLMN.
  • the communication device further includes a processing unit, configured to determine the access network device according to the area information allowing the terminal device to access the second PLMN, where the The access network device is located in the area where the terminal device is allowed to access the second PLMN.
  • the receiving unit is configured to obtain the first notification message from a network management network element through a network opening function network element in the second PLMN.
  • the receiving unit is further configured to obtain second indication information, and the second indication information is used to indicate to deactivate dynamic roaming between the second PLMN and the first PLMN Protocol; the sending unit is also used to send the second indication information to the terminal device through the access network device.
  • the communication device may be a core network element, such as an access management network element.
  • the second PLMN and the first PLMN have the same mobile country code, and the mobile network code of the second PLMN is different from the mobile network code of the first PLMN.
  • the dynamic roaming agreement between the second PLMN and the first PLMN includes: if the terminal device can access the first PLMN, the second PLMN and the first PLMN The roaming agreement between the two is deactivated; if the terminal device cannot access the first PLMN, the roaming agreement between the second PLMN and the first PLMN is activated.
  • the first PLMN is the home public land mobile network HPLMN
  • the second PLMN is the visited public land mobile network VPLMN.
  • the present application provides a communication device, including a processor, which reads computer-readable instructions stored in a memory, so that the communication device executes the first aspect or any one of the possibilities of the first aspect.
  • the method in the implementation mode includes a processor, which reads computer-readable instructions stored in a memory, so that the communication device executes the first aspect or any one of the possibilities of the first aspect.
  • the present application provides a communication device including a processor that reads computer-readable instructions stored in a memory, so that the communication device executes the second aspect or any one of the second aspects. The method in the implementation.
  • this application provides a communication system.
  • the communication system includes the communication device in the fourth aspect or the sixth aspect and an access network device connected to the communication device.
  • the communication device communicates with the terminal device through the access network device.
  • the present application provides a computer-readable storage medium, including computer-readable instructions, which when executed on a computer, cause the computer to execute any one of the methods in the first aspect or the second aspect.
  • this application provides a computer program product, including a computer program, which when the program runs on a computer, causes the computer to execute any one of the methods in the first aspect or the second aspect.
  • this application provides a chip or chip system.
  • the chip or chip system includes at least one processor and a communication interface, the communication interface is coupled with at least one processor, and the processor is used to run a computer program or instruction to execute the method in the first aspect or any possible implementation of the first aspect ,
  • the communication interface is used to communicate with other modules outside the chip.
  • FIG. 1 is a schematic diagram of a scenario to which an embodiment of this application is applicable
  • Figure 2 is a schematic diagram of a 5G network to which an embodiment of the application is applicable;
  • FIG. 3 is a schematic diagram of a roaming method according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of another roaming method according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of another roaming method according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of another roaming method according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 8 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • FIG. 9 is a schematic structural diagram of a chip or chip system provided by an embodiment of the application.
  • words such as “first” and “second” are used to distinguish similar content.
  • the first PLMN and the second PLMN are only for distinguishing different PLMNs, and the sequence of them is not limited.
  • words such as “first” and “second” do not limit the quantity and order of execution, and words such as “first” and “second” do not limit the difference.
  • At least one refers to one or more, and “multiple” refers to two or more.
  • “And/or” describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects before and after are in an “or” relationship.
  • the following at least one item (a)” or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a).
  • at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
  • a terminal device wants to obtain the service provided by the network, it needs to select a PLMN, reside in a suitable cell, and successfully complete the registration process.
  • PLMN selection can be divided into automatic mode and manual mode according to the operation mode.
  • the terminal device automatically starts from the PLMN with the highest priority according to the priority order of each PLMN in the PLMN list, and if it succeeds, it selects a suitable cell for camping on the PLMN. If the selection of a high-priority PLMN fails, the terminal device tries the second-priority PLMN until the terminal device can successfully register to a certain PLMN.
  • the terminal device will present a list of currently available PLMNs to the user (for example: present in priority order). The user selects the appropriate PLMN to access according to the presented PLMN list.
  • the automatic mode it can be divided into PLMN selection based on a priori information and initial PLMN selection based on whether there is a priori information.
  • the PLMN selection based on a priori information means that the terminal device records the last (for example: current) registered PLMN (Registered PLMN, RPLMN). When the terminal device is powered on next time or returns to the coverage area, RPLMN is selected with the highest priority. If RPLMN is unavailable, perform PLMN selection according to the initial selection method.
  • RPLMN Registered PLMN
  • the initial PLMN selection means that the middle terminal device selects the PLMN according to various PLMNs and their priorities recorded in the Universal Subscriber Identity Module (USIM) without prior information.
  • these PLMNs can be arranged in descending order of priority as follows: (1) HPLMN; (2) Equivalent HPLMN (Equivalent HPLMN, EHPLMN); (3) User Controlled PLMN (User Controlled PLMN) ); (4) Operator Controlled PLMN (Operator Controlled PLMN); (5) PLMN selected according to service quality requirements; (6) Other PLMNs.
  • the user-controlled PLMN means that the user of the terminal device can select the corresponding PLMN according to preference.
  • the PLMN controlled by the operator is when the SIM is made.
  • the operator stores the PLMNs of other operators that have signed a roaming agreement with the operator in the terminal device SIM, and the terminal device can select the corresponding PLMN to access according to the stored PLMN .
  • the PLMN selected according to the quality of service requirements can be an indication information used to instruct the terminal equipment to select the corresponding PLMN according to the requirements of the quality of service, for example: select a network where the reference signal receiving power (RSRP) is not lower than -110dBm . If none of the above PLMNs (1) to (5) can be accessed, the terminal device can select other accessible PLMNs.
  • RSRP reference signal receiving power
  • these PLMNs will be set by the terminal device as prohibited PLMNs. For example: if the terminal device receives the reason information that the PLMN is not allowed "PLMN not allowed", the terminal device will add the PLMN to the SIM "forbidden PLMN" list.
  • the terminal equipment of a certain operator fails to access the PLMN of other operators that have not signed a roaming agreement, and the terminal equipment will put the failed PLMN into forbidden PLMN list.
  • the terminal device If the terminal device is in the automatic network selection mode, the terminal device will not subsequently try to access any PLMN in the forbidden PLMN list. If subsequent users manually try to access the PLMN and the registration is successful, the terminal device will delete the PLMN in the forbidden PLMN list.
  • the forbidden PLMN list is generated, the PLMN in the forbidden PLMN list will not be automatically deleted even if the terminal device is turned off or the SIM card is removed.
  • FIG. 1 is a schematic diagram of a scenario to which an embodiment of the present application is applicable.
  • the terminal device cannot access the first PLMN (for example, the first PLMN fails)
  • the terminal device can access the second PLMN according to the dynamic roaming agreement between the first PLMN and the second PLMN.
  • the first PLMN is HPLMN
  • the second PLMN is Visited Land Mobile Network (VPLMN).
  • VPLMN Visited Land Mobile Network
  • the first PLMN and the second PLMN have the same mobile country code (Mobile Country Code, MCC), and the mobile network code (Mobile Network Code, MNC) of the first PLMN and the mobile network code of the second PLMN have the same mobile country code (MCC).
  • MCC Mobile Country Code
  • MNC Mobile Network Code
  • MCC Mobile Country Code
  • MNC Mobile Network Code
  • the failure of the PLMN may refer to the failure of the PLMN in the area where the terminal device is located, and does not necessarily refer to the failure of the entire PLMN.
  • FIG. 2 is a schematic diagram of a 5G network to which an embodiment of the present application is applicable.
  • the 5G network in Figure 2 adopts a service-oriented network architecture.
  • the embodiments of the present application may also adopt other 5G network architectures, which are not limited here.
  • the 5G network architecture shown in Figure 2 includes: access network (AN) nodes and multiple network function (NF) network elements.
  • multiple NF network elements may include: user plane function (UPF) network elements, access and mobility management function (access and mobility management function, AMF) network elements, session management function (session management function, SMF) network element, policy control function (PCF) network element, network slice selection function (NSSF) network element, unified data management (UDM) network element, network warehouse function ( network repository function (NRF) network element, network exposure function (NEF) network element, data storage function network element (unified data repository, UDR), network management network element, etc.
  • the network architecture may also include terminal equipment, data network (DN) nodes, application function (AF) network elements, and so on.
  • the network management network element may be an operation and maintenance management (Operation Administration and Maintenance, OAM) system.
  • OAM Operaation Administration and Maintenance
  • the OAM system can communicate with other NF network elements through NEF network elements.
  • the OAM system can also directly communicate with other NF network elements, which is not limited in the embodiment of this application.
  • Each network element in FIG. 2 can be either a network element in a hardware device, a software function running on dedicated hardware, or a virtualization function instantiated on a platform (for example, a cloud platform).
  • the network elements included in the network architecture are not limited.
  • the network architecture may include any one or more of all the network elements shown in FIG. 2 above. Network elements.
  • the terminal device is an electronic device with wireless communication function, which can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on the water (such as ships, etc.); it can also be deployed in the air (such as airplanes). , Balloons and satellites etc.).
  • Terminal equipment can be user equipment (UE), mobile phone (mobile phone), tablet computer (pad), computer with wireless transceiver function, virtual reality (VR) terminal equipment, augmented reality (AR) ) Terminal equipment, wireless terminal equipment in industrial control, wireless terminal equipment in unmanned driving (self-driving), wireless terminal equipment in remote medical, wireless terminal equipment in smart grid (smart grid) Terminal equipment, wireless terminal equipment in transportation safety, wireless terminal equipment in smart city, wireless terminal equipment in smart home, etc.
  • An AN node can be a device that provides wireless access to the UE, including but not limited to evolved Node B (evolved node B, referred to as eNB), wireless fidelity access point (wireless-fidelity access point, referred to as WiFi AP), global Microwave interconnected access base station (worldwide interoperability for microwave access base station, WiMAX BS for short), base station in 5G network (for example, gNodeB, gNB), etc.
  • the AN node may also be a (radio access network, RAN) node or an access node in a subsequent evolved network.
  • UPF network elements can process messages.
  • UPF can perform functions such as user data forwarding, routing, data statistics, rate limiting, and statistics reporting.
  • the AMF network element can perform mobility management in the mobile network, such as user location update, user registration network, user handover, and so on.
  • AMF network elements can access the UE's non-access stratum (NAS) signaling (including session management (SM) signaling) through the N1 interface, and can also access the RAN signaling through the N2 interface , To complete the user registration process and the forwarding of SM signaling and mobility management.
  • the AMF network element can forward messages between the SMF network element and the UE.
  • the SMF network element can manage the sessions in the mobile network, such as session establishment, session modification, and session release.
  • the PCF network element can manage user policies, including mobility-related policies, Protocol Data Unit (PDU) session-related policies, such as quality of service (QoS) policies, charging policies, etc.
  • PDU Protocol Data Unit
  • QoS quality of service
  • charging policies etc.
  • Network slicing is a logically isolated network used to support specific network capabilities and network characteristics. It can be end-to-end (E2E) including the entire network, or part of the network functions can be shared among multiple network slices.
  • E2E end-to-end
  • the 5G 5G mobile communication technology proposed by 3GPP is a key technology for network differentiation requirements. Generally, the network characteristics of different network slices are not the same, and the network slices are required to be isolated from each other without affecting each other. For example, network slicing for augmented reality (AR) or virtual reality (VR) services requires large bandwidth and low latency; network slicing for Internet of Things (IOT) services requires massive terminal access. But the bandwidth is small and there is no requirement for delay.
  • AR augmented reality
  • VR virtual reality
  • IOT Internet of Things
  • the UDM network element is responsible for managing the user's subscription data and other information, and the UDM network element can provide the user's subscription data to network elements such as AMF and SMF.
  • UDR network elements store structured data in the network, including user subscription data information and user policies.
  • UDM can read terminal contract data from UDR
  • PCF can read user policy information from UDR.
  • UDR can also be divided into two parts and merged with UDM and PCF network elements separately, instead of independent deployment.
  • the NRF network element stores the registration information of other functional network elements, and provides services for mutual search and discovery between network functional network elements based on the registration information.
  • NEF network elements are responsible for the authorization and control of network opening services and capabilities. AF network elements located outside the operator's network can provide network data to the network through NEF network elements, and can also obtain network open services and data through NEF.
  • the DN is used to provide data services to the UE, and can be the access destination of the user's PDU session.
  • the DN can be a PDN network, such as the Internet, IP multi-media service (IP multi-media Service, IMS), and so on.
  • IP multi-media Service IP multi-media Service, IMS
  • the AF network element can send requests to influence the SMF routing strategy, and is responsible for selecting and relocating applications in the local DN.
  • AF mainly performs dynamic policy/charging control on forwarding plane behavior. These services require dynamic policy and charging control.
  • AF transmits the dynamic session information needed by PCF,
  • the first PLMN and the second PLMN may both adopt the architecture shown in FIG. 2.
  • the first PLMN and the second PLMN may also adopt other network architectures, such as: Evolved Packet Core network (EPC) architecture or future evolved system architecture, which is not limited here.
  • EPC Evolved Packet Core network
  • FIG. 3 is a schematic diagram of a roaming method according to an embodiment of the present application.
  • the roaming method includes:
  • a core network element in the second PLMN obtains first indication information, where the first indication information is used to indicate a dynamic roaming agreement between the first PLMN and the second PLMN Activated.
  • the first PLMN may be the HPLMN of the terminal device
  • the second PLMN may be the VPLMN of the terminal device.
  • the deactivation of the roaming agreement between the first PLMN and the second PLMN may mean that there is no roaming agreement between the first PLMN and the second PLMN, or that the first PLMN and the second PLMN are The inter-roaming agreement is not available.
  • the activation of the roaming agreement between the first PLMN and the second PLMN refers to the existence of a roaming agreement between the first PLMN and the second PLMN, or the connection between the first PLMN and the second PLMN Roaming agreements are available.
  • a dynamic roaming agreement between the first PLMN and the second PLMN includes: if the first condition is met, the roaming agreement between the first PLMN and the second PLMN is valid.
  • the first condition may be that the first PLMN fails, or the terminal device cannot access the first PLMN.
  • the dynamic roaming agreement may also be referred to as a temporary roaming agreement, which is not limited in this application.
  • the core network element is an access management network element.
  • the access management network element may be an AMF network element; when the first PLMN and the second PLMN When a 4G network architecture is adopted, the access management network element may be a mobility management entity (mobility management entity, MME).
  • MME mobility management entity
  • the access management network element is an AMF network element for illustration.
  • the core network element in the second PLMN obtains the first notification message, where the first notification message includes the first indication information.
  • the AMF network element may obtain the first notification message from the network management network element (for example: OAM network element) through the network opening function network element in the second PLMN.
  • the AMF network element may also directly obtain the first notification message from the OAM network element, which is not limited in the embodiment of the present application.
  • the OAM system of the first PLMN can send an indication message to the OAM system of the second PLMN2 to indicate the activation of dynamic roaming between the first PLMN and the second PLMN protocol.
  • the dynamic roaming agreement between the first PLMN and the second PLMN may be activated by the second PLMN. For example, when the second PLMN learns that the first PLMN has failed, the OAM system of the second PLMN decides to activate the dynamic roaming agreement between the first PLMN and the second PLMN.
  • the first notification message further includes information of the first PLMN.
  • the information of the first PLMN may include identification information of the first PLMN.
  • the terminal device can determine a PLMN that has a dynamic roaming agreement with the second PLMN.
  • the identification information of the first PLMN may be an identification (identify, ID) of the first PLMN.
  • the first notification message further includes area information allowing the terminal device to access the second PLMN.
  • the area information may be a tracking area (Tracking Area, TA) identifier list (TA), and the list includes one or more tracking area identifiers.
  • the area information may be the area information of the second PLMN that allows the terminal device to access the second PLMN in the area where the first PLMN has failed. It can be understood that the area in the second PLMN that allows terminal equipment to access the second PLMN has an overlapping area with the area where the first PLMN fails. In this way, the terminal equipment located in the failure area of the first PLMN can be moved without moving. The terminal device is allowed to access the second PLMN, which improves the service experience of the terminal device.
  • the first notification message may further include policy information for the terminal device to access the second PLMN.
  • the policy information includes at least one of the following information: an access technology type that allows the terminal device to access the second PLMN, and priority information of the second VPLMN.
  • the priority information of the second PLMN can be understood as, when the terminal device sequentially attempts to access multiple PLMNs, among these multiple PLMNs, the priority of the terminal device accessing the second PLMN or the terminal device accessing the second PLMN order of.
  • the priority information of the second PLMN may also be referred to as the priority of the second PLMN in the network selection list of the terminal device, which is not limited herein.
  • the type of access technology that allows terminal equipment to access the second PLMN includes the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP) access technology, and/or non-3GPP (Non-3GPP) access technology. ) Access technology.
  • 3rd Generation Partnership Project 3rd Generation Partnership Project
  • Non-3GPP Non-3GPP
  • the priority information of the second PLMN includes that the priority of the second PLMN is lower than the priority of any one of the following PLMNs: the priority of the first PLMN, the equivalent PLMN (Equivalent PLMN of the first PLMN) , EPLMN) priority, user-controlled PLMN (User Controlled PLMN) priority, and operator-controlled (PLMN Operator Controlled PLMN) priority.
  • the network selection sequence of the terminal device is: (1) the first PLMN, (2) the equivalent PLMN of the first PLMN, (3) the user-controlled PLMN, (4) the operator-controlled PLMN, (5) the second PLMN.
  • the terminal device sequentially tries to access (1) the first PLMN, (2) the equivalent PLMN of the first PLMN, (3) the user-controlled PLMN, and (4) the operator-controlled PLMN, but they cannot successfully access At this time, the terminal device can try to access the second PLMN.
  • the priority information of the second PLMN includes that the priority of the second PLMN is higher than the priority of the PLMN selected by the user according to the quality of service requirements, or the priority of the second PLMN is lower than the operator control
  • the priority of the PLMN is higher than the priority of the PLMN selected by the user according to the quality of service requirements.
  • the priority information of the second PLMN may also include the priority of each second PLMN.
  • the core network element sends the first indication information to the terminal device.
  • the core network element determines the access network device according to the area information that allows the terminal device to access the second PLMN. Wherein, the access network device is located in an area where the terminal device is allowed to access the second PLMN.
  • the core network element sends the first indication information to the terminal device through the determined access network device. For example, if the area where the terminal device is allowed to access the second PLMN contains multiple access network devices, the multiple access network devices may simultaneously send broadcast messages to the terminal device.
  • the access network device sends a broadcast message to the terminal device.
  • the broadcast message includes the first indication information.
  • the broadcast message may also include identification information of the first PLMN.
  • the terminal device can determine a PLMN that has a dynamic roaming agreement with the second PLMN.
  • the broadcast message further includes area information allowing the terminal device to access the second PLMN.
  • area information allowing the terminal device to access the second PLMN. For details about this area, refer to the description of 301.
  • the broadcast message may further include policy information for the UE to access the second PLMN.
  • policy information refer to the description of 301.
  • the terminal device accesses the second PLMN.
  • the terminal device accesses the second PLMN according to the first indication information.
  • the terminal device may determine that the first PLMN is an HPLMN according to the identification information of the first PLMN included in the broadcast message. Then, the terminal device sends an access request message to the second PLMN according to the first indication information.
  • the access request message may be a registration request (registration request) message.
  • the terminal device sends an access request message to the second PLMN according to the received policy information for accessing the second PLMN. For example, the terminal device determines which access technology to select according to the policy information to send the access request message to the second PLMN. For another example, the terminal device determines the priority of the second PLMN according to the policy information, and then sends an access request message to the second PLMN according to the priority of the second PLMN.
  • the terminal device can access the second PLMN.
  • the following operations 304 to 306 may be performed to enable the terminal device to re-access to the first PLMN.
  • the core network element in the second PLMN obtains second indication information, where the second indication information is used to indicate the deactivation of the dynamic roaming protocol between the second PLMN and the first PLMN.
  • the core network element in the second PLMN obtains the second notification message, and the second notification message includes the second indication information.
  • the manner in which the core network element obtains the second notification message is similar to the manner in which the core network element obtains the first notification message, and specifically refer to the description of 301.
  • the OAM system of the first PLMN may send an indication message to the OAM system of the second PLMN to indicate dynamic roaming between the first PLMN and the second PLMN
  • the agreement is deactivated.
  • the dynamic roaming agreement between the first PLMN and the second PLMN may be deactivated by the second PLMN. For example, when the second PLMN learns that the first PLMN has recovered from the failure, the OAM system of the second PLMN decides to deactivate the dynamic roaming agreement between the first PLMN and the second PLMN.
  • the second notification message further includes information of the first PLMN.
  • the information of the first PLMN may include identification information of the first PLMN. In this way, the terminal device can determine that it is unable to roam to the second PLMN.
  • the second notification message further includes area information in which the terminal device is not allowed to access the second PLMN.
  • the area information may be a tracking area identification list (TA list), which includes one or more tracking area identifications.
  • the area information may be area information in the second PLMN that does not allow the terminal device to access the second PLMN after the failure of the first PLMN is recovered.
  • the area information in the second PLMN that allows the terminal device to access the second PLMN and the area information that does not allow the terminal device to access the second PLMN in step 304 may be completely the same, partially the same, or completely different;
  • the area information in the second PLMN that allows terminal equipment to access the second PLMN is called the first area, and the first area contains the first tracking area identification list; terminal equipment will not be allowed to access the second PLMN.
  • the area information of the PLMN is called the second area, and the second area contains the second tracking area identifier list.
  • one or more tracking area identifiers in the first tracking area identifier list and one or more tracking area identifiers in the second tracking area identifier list may be completely the same, partially the same, or completely different, which is not limited in the present invention.
  • the core network element sends the second indication information to the terminal device.
  • the core network element determines the access network device according to the area information in which the terminal device is not allowed to access the second PLMN. Wherein, the access network device is located in an area where the terminal device is not allowed to access the second PLMN. The core network element sends the second indication information to the terminal device through the determined access network device.
  • the core network element sends the second indication information to the access network device.
  • the access network device may use the following two methods to send the second indication information to the terminal device.
  • the access network device sends a broadcast message to the terminal device.
  • the broadcast message includes the second indication information. Further, the broadcast message may also include identification information of the first PLMN.
  • the terminal device may determine that the first PLMN is an HPLMN according to the identification information of the first PLMN. In this way, the terminal device can determine that it cannot dynamically roam to the second PLMN.
  • the multiple access network devices can send broadcast messages to the terminal device at the same time.
  • the broadcast message also includes area information in which the terminal device is not allowed to access the second PLMN.
  • the area information may be a tracking area identification list (TA list), which includes one or more tracking area identifications.
  • the terminal device After receiving the broadcast message, the terminal device sends a deregistration request (deregistration request) message to the second PLMN, so that the terminal device deregisters in the second PLMN.
  • deregistration request deregistration request
  • the access network device sends a deregistration request message to the terminal device.
  • the deregistration request message includes second indication information.
  • the de-registration request message also includes area information in which the terminal device is not allowed to access the second PLMN. See the description of Mode 1 for details.
  • the terminal device accesses the first PLMN.
  • the terminal device sends an access request message to the first PLMN according to the second indication information, so as to access the first PLMN.
  • the access request message may be a registration request message.
  • the terminal device if the first PLMN fails and the terminal device cannot access the first PLMN, the terminal device sends an access request to the second PLMN according to the first indication information from the second PLMN, thereby reducing the number of terminals.
  • the service waiting time of the equipment improves the user's service experience.
  • the terminal device sends an access request to the first PLMN according to the second indication information from the second PLMN, so that the terminal device can return to the first PLMN in time.
  • HPLMN includes access network equipment RAN1 and access management network element AMF1.
  • the VPLMN includes the access network equipment RAN2 and the access management network element AMF1.
  • HPLMN and VPLMN may also include other network elements, which are not limited here.
  • the VPLMN starts dynamic roaming with the HPLMN.
  • the method includes:
  • the UE cannot access the HPLMN.
  • the UE After the UE initially accesses the HPLMN, if the HPLMN fails, the UE cannot access the HPLMN.
  • the OAM network element sends the first indication information to the NEF network element.
  • the VPLMN When the VPLMN learns that the HPLMN cannot be accessed due to a failure, the VPLMN activates dynamic roaming with the HPLMN, allowing UEs of the HPLMN to access the VPLMN.
  • the OAM network element in the VPLMN obtains the first notification message through a third party or directly through the HPLMN and sends the first notification message to the NEF network element.
  • the first notification message includes first indication information.
  • the first indication information is used to indicate that the dynamic roaming agreement between HPLMN and VPLMN is activated.
  • the first notification message may also include identification information of HPLMN. Through the identification information of the HPLMN, the PLMN that is allowed to roam to the VPLMN can be determined.
  • the first notification message further includes area information allowing the terminal device to access the VPLMN, and/or policy information for the UE to access the VPLMN.
  • area information allowing terminal equipment to access the VPLMN and the policy information for UE accessing the VPLMN refer to the area information allowing terminal equipment to access the second PLMN and the policy information for UE accessing the second PLMN in 301.
  • the NEF network element sends the first indication information to the AMF2 network element.
  • the NEF network element determines the corresponding AMF2 according to the area information allowing the terminal device to access the VPLMN.
  • the service area of AMF2 is included in the above-mentioned area where terminal equipment is allowed to access the VPLMN.
  • the NEF network element can look up the AMF2 identifier according to the network topology. The NEF network element sends the foregoing first indication information to the AMF2 network element.
  • the NEF network element sends a first notification message to AMF2, where the first notification message includes the first indication information.
  • the first notification message may also include at least one of the following content: identification information of the HPLMN, area information allowing the terminal device to access the VPLMN, and policy information for the UE to access the VPLMN. Refer to the description of 402 for details.
  • the OAM network element in step 402 may also find the identity of AMF2 according to the network topology, and directly send the first indication information to AMF2.
  • the AMF2 network element sends the first indication information to the RAN2.
  • the AMF2 network element After the AMF2 network element receives the first notification message from the NEF network element or the OAM network element, it determines the corresponding RAN2 according to the area information allowing the terminal device to access the VPLMN. Wherein, the service area of RAN2 is included in the above-mentioned area where terminal equipment is allowed to access the VPLMN. Specifically, the AMF2 network element can find the RAN2 identifier according to the network topology. The AMF2 network element sends the foregoing first indication information to RAN2.
  • the AMF2 network element sends a first notification message to RAN2, and the first notification message may also include at least one of the following: identification information of the HPLMN, and area information that allows terminal devices to access the VPLMN, The UE accesses the policy information of the VPLMN. Refer to the description of 402 for details.
  • the RAN2 network element sends a notification message to the UE.
  • the RAN2 after receiving the first indication information, the RAN2 sends a broadcast message to the UE according to the first indication information.
  • the notification message is the broadcast message.
  • the broadcast message includes the first indication information.
  • the broadcast message further includes at least one of the following contents: identification information of the HPLMN, area information allowing terminal devices to access the VPLMN, and policy information for the UE to access the VPLMN. Refer to the description of 402 for details.
  • the UE selects VPLMN.
  • the UE After the UE receives the broadcast message, if the HPLMN in the broadcast message is the same as the HPLMN of the UE, the corresponding policy information is used to select access to the VPLMN.
  • the UE selects to access the VPLMN according to the priority order of the VPLMN. For another example: if the policy information includes the type of access technology, the UE uses the corresponding access technology type to access the VPLMN.
  • the UE sends a registration request message to AMF2 in the VPLMN.
  • the UE can access the VPLMN that has a dynamic roaming agreement with the HPLMN.
  • the embodiment shown in FIG. 5 provides a method for the UE to return to the HPLMN from the VPLMN. Specifically, the method includes:
  • the UE After the HPLMN fails, the UE cannot access the HPLMN, and the UE can successfully access the VPLMN through the method of the embodiment in FIG. 4. For details, refer to the description of steps 401 to 407.
  • the OAM network element sends second indication information to the NEF network element.
  • the OAM network element obtains the second notification message through a third party or directly through HPLMN.
  • the second notification message includes second indication information.
  • the second indication information is used to indicate the deactivation of the dynamic roaming protocol between HPLMN and VPLMN.
  • the second notification message may also include identification information of HPLMN. Through the identification information of the HPLMN, it can be determined that the PLMN that is not allowed to roam to the VPLMN can be determined.
  • the second notification message also does not include area information allowing the terminal device to access the VPLMN.
  • the area information in which the terminal device is not allowed to access the VPLMN may be a tracking area identification list (TA list), which includes one or more tracking area identifications.
  • TA list tracking area identification list
  • the NEF network element sends second indication information to the AMF2 network element.
  • the NEF network element determines the corresponding AMF2 according to the area information in which the terminal device is not allowed to access the VPLMN.
  • the service area of AMF2 is included in the above-mentioned area where terminal devices are not allowed to access the VPLMN.
  • the NEF network element can look up the AMF2 identifier according to the network topology. The NEF network element sends the foregoing second indication information to the AMF2 network element.
  • the NEF network element sends a second notification message to AMF2, and the second notification message includes second indication information.
  • the second notification message may also include at least one of the following content: identification information of the HPLMN, and area information in which terminal devices are not allowed to access the VPLMN. See the description of 504 for details.
  • the OAM network element in step 504 may also find the identity of AMF2 according to the network topology, and directly send the second indication information to AMF2.
  • the AMF2 network element sends second indication information to the RAN2.
  • the AMF2 network element After the AMF2 network element receives the second notification message from the NEF network element or the OAM network element, it determines the corresponding RAN2 according to the area information in which the terminal device is not allowed to access the VPLMN. Wherein, the service area of RAN2 is included in the above-mentioned area where terminal equipment is not allowed to access the VPLMN. Specifically, the AMF2 network element can find the RAN2 identifier according to the network topology. The AMF2 network element sends the above-mentioned second indication information to RAN2.
  • the AMF2 network element sends a second notification message to RAN2.
  • the second notification message may also include at least one of the following: identification information of the HPLMN, and area information where terminal devices are not allowed to access the VPLMN . See the description of 504 for details.
  • the RAN2 network element sends a second notification message to the UE.
  • the RAN2 after receiving the second indication information, the RAN2 sends a broadcast message to the UE according to the second indication information.
  • the second notification message may be the broadcast message.
  • the broadcast message includes the second indication information.
  • the broadcast message further includes at least one of the following contents: identification information of the HPLMN, and area information in which terminal devices are not allowed to access the VPLMN. See the description of 504 for details.
  • the UE sends a deregistration request message to AMF2.
  • the UE after the UE receives the broadcast message, if the HPLMN in the broadcast message is the same as the HPLMN of the UE, the UE learns that the dynamic roaming protocol between the HPLMN and the VPLMN is deactivated according to the second indication information. Therefore, the UE sends a de-registration request message to AMF2, which triggers the UE to exit the network from the VPLMN.
  • the UE selects HPLMN.
  • the UE learns that the dynamic roaming protocol between HPLMN and VPLMN is deactivated according to the second indication information.
  • the UE can choose to access the HPLMN according to its stored PLMN selection list.
  • the UE sends a registration request message to AMF1 in the HPLMN.
  • the UE can return to the HPLMN from the VPLMN.
  • the embodiment shown in FIG. 6 provides another method for the UE to return to the HPLMN from the VPLMN. Specifically, the method includes:
  • the AMF2 network element sends a deregistration request message to RAN2.
  • the AMF2 network element determines whether the HPLMN corresponding to the UE currently registered with the AMF2 is in the second notification message The HPLMN included is the same; if they are the same, further, the AMF2 network element determines whether the current location of the UE belongs to the area according to the area information included in the second notification message that does not allow terminal equipment to access the VPLMN; if it does, AMF2
  • the UE initiates a de-registration process. Specifically, the AMF2 network element sends a de-registration request message to RAN2.
  • the deregistration request message includes the second indication information.
  • the registration request message may also include at least one of the following contents: area information where the terminal device is not allowed to access the VPLMN. See the description of 504 for details.
  • the RAN2 network element sends a deregistration request message to the UE.
  • RAN2 after receiving the de-registration request message, RAN2 sends a de-registration request message to the UE.
  • the deregistration request message includes the second indication information.
  • the UE After receiving the deregistration request message, the UE learns that the dynamic roaming protocol between HPLMN and VPLMN is deactivated according to the second indication information. Therefore, the UE exits the network from the VPLMN.
  • the UE can also return to the HPLMN from the VPLMN.
  • the PLMN selection list stored by the UE may include dynamic roaming PLMN information, as shown in Table 1.
  • PLMN priority PLMN list 1 HPLMN or EHPLM 2 User controlled PLMN 3 Operator controlled PLMN 4 Dynamic roaming PLMN 5 PLMN selected according to service quality requirements 6 Other PLMN
  • the network selection priority of PLMN is shown from high to low in the order from 1 to 6.
  • the PLMN in the order "1" corresponds to the highest network selection priority
  • the PLMN in the order "6" corresponds to The network selection priority is the lowest.
  • HPLMN or EHPLMN has the highest priority.
  • the user-controlled PLMN has the second level of priority.
  • Table 1 may also include the access technology type corresponding to the PLMN controlled by the user.
  • the PLMN controlled by the operator has the third level of priority.
  • Table 1 may also include the type of access technology corresponding to the PLMN controlled by the operator.
  • the dynamic roaming PLMN refers to the aforementioned second PLMN. Dynamic roaming PLMN has the fourth level of priority.
  • the terminal device After obtaining the information of the second PLMN, the terminal device stores the information of the second PLMN in the dynamic roaming PLMN.
  • the PLMN selected according to the quality of service requirements has the fifth level of priority.
  • the PLMN selected according to the service quality requirements means that the terminal equipment selects the PLMN that meets the quality requirements according to the signal quality and/or access technology type of each PLMN.
  • the information of the second PLMN (that is, the dynamic roaming PLMN in Table 1) will be added to Table 1 only after the UE obtains the information of the second PLMN.
  • the dynamic roaming PLMN in Table 1 is The terminal equipment is dynamically generated according to the received dynamic roaming PLMN information. Before the UE obtains the information of the second PLMN, the PLMN selection list of the terminal equipment does not include the information of the second PLMN, that is, the information of the second PLMN is not included in Table 1, so the terminal equipment will not consider the second PLMN in the network selection process. PLMN information.
  • the content in the foregoing Table 1 may be stored in a subscriber identity module (Subscriber Identity Module, SIM) of the terminal device.
  • SIM Subscriber Identity Module
  • the terminal device can select the corresponding PLMN to access in sequence according to the PLMN priority in Table 1.
  • Fig. 7 is a schematic diagram of a communication device in an embodiment of the present application. Specifically, it includes a processing unit 701, a receiving unit 702, and a sending unit 703. The communication device may further include a storage unit 704. The processing unit 701, the receiving unit 702, the sending unit 703, and the storage unit 704 may be physically separated units, or may be integrated into one or more physical units, which are not limited here.
  • the receiving unit 702 and the sending unit 703 are used to implement content interaction between the processing unit 701 and other units or network elements.
  • the sending unit 703 may be a sending circuit or a transmitter.
  • the receiving unit 702 may be a receiving circuit or a receiver.
  • the sending unit 703 and the receiving unit 702 may also be transceivers of the communication device.
  • the sending unit 703 and the receiving unit 702 may also be a communication interface or a transceiver circuit of the processing unit 701.
  • the sending unit 703 and the receiving unit 702 may be a transceiver chip.
  • the communication device may also include multiple sending units 703 and multiple receiving units 702.
  • the sending unit 703 and the receiving unit 702 may also be subunits of one or more transceiver units.
  • the processing unit 701 is used to implement data processing by the communication device.
  • the processing unit 701 may be a processing circuit or a processor.
  • the processor may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.
  • the processor may further include a hardware chip.
  • the above-mentioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • the above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (Generic Array Logic, GAL) or any combination thereof.
  • the communication device may also include multiple processing units or the processing unit 701 may include multiple sub-data processing units.
  • the processor may be a single-CPU (single-CPU) processor or a multi-core (multi-CPU) processor.
  • the storage unit 704 is used to store computer instructions executed by the processing unit 701.
  • the storage unit 704 may be a storage circuit or a memory.
  • the memory may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically accessible memory. Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • the storage unit 704 may be a unit independent of the processing unit 701, or may be a storage unit in the processing unit 701, which is not limited herein. Although only one storage unit is shown in FIG. 7, the communication device may also include multiple storage units or the storage unit may include multiple sub-storage units.
  • the processing unit 701 may interact with other network elements through the sending unit 703 and the receiving unit 702. For example, the processing unit 701 obtains or receives content from other network elements.
  • the processing unit 701, the sending unit 703, the receiving unit 702, and the storage unit 704 may be connected to each other through a bus.
  • the bus may be a peripheral component interconnect standard (PCI) bus or an extended industry standard architecture (EISA) bus, etc.
  • PCI peripheral component interconnect standard
  • EISA extended industry standard architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and so on.
  • the communication device may be the terminal device in the embodiments of Figs. 3-6.
  • the communication device includes: a processing unit, configured to connect the communication device to a second PLMN when the communication device cannot access the first PLMN, and the communication between the second PLMN and the first PLMN The dynamic roaming protocol is activated; a receiving unit, configured to receive indication information from the second PLMN, where the indication information is used to indicate the deactivation of the dynamic roaming protocol between the second PLMN and the first PLMN; sending unit , Used to send an access request message to the first PLMN according to the instruction information.
  • the receiving unit is configured to receive a broadcast message from the second PLMN, where the broadcast message includes the indication information.
  • the broadcast message further includes the identification information of the first PLMN, and/or the area information of the second PLMN is not allowed to be accessed by the communication device.
  • the processing unit is further configured to deregister the communication device in the second PLMN.
  • the receiving unit is configured to receive a de-registration request message from the second PLMN, where the de-registration request message includes the indication information.
  • the deregistration request message further includes area information in which the communication device is not allowed to access the second PLMN.
  • the receiving unit is further configured to receive, before the communication device accesses the second PLMN, a message from the second PLMN that is used to indicate that the second PLMN is connected to the first PLMN. An indication that the dynamic roaming agreement between PLMNs is activated.
  • the receiving unit is further configured to obtain information of the second PLMN before the communication device accesses the second PLMN.
  • the information of the second PLMN further includes at least one of the following information: the type of access technology that allows the communication device to access the second PLMN, and the type of access technology that allows the communication device to access the second PLMN; Enter the area information of the second PLMN and the priority information of the second PLMN.
  • the second PLMN and the first PLMN have the same mobile country code, and the mobile network code of the second PLMN is different from the mobile network code of the first PLMN.
  • the dynamic roaming agreement between the second PLMN and the first PLMN includes: if the communication device can access the first PLMN, the second PLMN and the first PLMN The roaming agreement between the first PLMN is deactivated; if the communication device cannot access the first PLMN, the roaming agreement between the second PLMN and the first PLMN is activated.
  • the first PLMN is the home public land mobile network HPLMN
  • the second PLMN is the visited public land mobile network VPLMN.
  • the receiving unit 702 is configured to perform the signal receiving operation of the terminal device in the embodiment of FIG. 3 to FIG. 6.
  • the sending unit 703 is configured to perform the signal sending operation of the terminal device in the embodiments of FIG. 3 to FIG. 6.
  • the processing unit 701 is configured to perform the signal processing operations of the terminal device in the embodiments of FIG. 3 to FIG. 6.
  • the processing unit 71 causes the communication device to execute the operation of the terminal device in the embodiments of FIGS. 3-6 according to the computer instructions stored in the storage unit 704.
  • the communication device may also be an access management network element.
  • the communication apparatus may include: a receiving unit, configured to obtain first indication information when the terminal device cannot access the first PLMN, where the first indication information is used to instruct to activate the communication between the second PLMN and the first PLMN
  • the communication device is a device in the second PLMN; and a sending unit is configured to send the first indication information to the terminal device.
  • the receiving unit is configured to obtain a first notification message, and the first notification message includes the first indication information.
  • the first notification message further includes information of the first PLMN, and the information of the first PLMN includes identification information of the first PLMN.
  • the first notification message further includes at least one of the following information: the type of access technology that allows the terminal device to access the second PLMN, and the type of access technology that allows the terminal device to access Area information of the second PLMN and priority information of the second PLMN.
  • the communication device further includes a processing unit, configured to determine the access network device according to the area information allowing the terminal device to access the second PLMN, where the The access network device is located in the area where the terminal device is allowed to access the second PLMN.
  • the receiving unit is configured to obtain the first notification message from a network management network element through a network opening function network element in the second PLMN.
  • the receiving unit is further configured to obtain second indication information, and the second indication information is used to indicate to deactivate dynamic roaming between the second PLMN and the first PLMN Protocol; the sending unit is also used to send the second indication information to the terminal device through the access network device.
  • the communication device may also be the access management network element in FIGS. 4-6, such as AM1 or AMF2.
  • the receiving unit 702 is configured to perform the signal receiving operation of the AMF network element in the embodiments of FIG. 4 to FIG. 6.
  • the sending unit 703 is configured to perform the signal sending operation of the AMF network element in the embodiments of FIG. 4 to FIG. 6.
  • the processing unit 701 is configured to perform the signal processing operation of the AMF network element in the embodiments of FIG. 4 to FIG. 6.
  • the description in the embodiments of Figs. 4-6 refer to the description in the embodiments of Figs. 4-6.
  • the processing unit 701 causes the communication device to execute the operations of the AMF network element in the embodiments of FIGS. 4 to 6 according to the computer instructions stored in the storage unit 704.
  • Fig. 8 is a schematic diagram of another communication device in an embodiment of the present application.
  • the communication device includes at least one processor 801, a transceiver 802, and a memory 803.
  • At least one processor 801, transceiver 802, and memory 803 are connected through a communication line 804.
  • the processor 801 may be a CPU, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of the program of the present application.
  • the memory 803 is used to store computer-executable instructions for executing the solution of the present application, and the processor 801 controls the execution.
  • the processor 801 is configured to execute computer execution instructions stored in the memory 803, so as to implement the operation of the terminal device or the AMF network element in the above-mentioned embodiments of FIG. 3 to FIG. 6 of the present application.
  • the computer execution instructions in the embodiments of the present application may also be referred to as application program codes, which are not specifically limited in the embodiments of the present application.
  • the processor 801 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 7.
  • the processor 801 may be a single-CPU (single-CPU) processor or a multi-core (multi-CPU) processor.
  • FIG. 9 is a schematic structural diagram of a chip or a chip system provided by an embodiment of the present application.
  • the chip includes one or more (including two) processors 901 and a communication interface 902.
  • the chip or chip system may further include a memory 903.
  • the memory 903 may include a read-only memory and a random access memory, and provides operation instructions and data to the processor 901.
  • the memory 903 stores the following elements, execution modules or data structures, or their subsets, or their extended sets.
  • the terminal device or the AMF network element in the embodiment of FIG. 3 to FIG. 6 is controlled to perform corresponding operations.
  • the computer program product includes one or more computer programs or instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, network equipment, user equipment, or other programmable devices.
  • the computer program or instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer program or instruction may be transmitted from a website, a computer, or The server or data center transmits to another website site, computer, server or data center through wired or wireless means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that integrates one or more available media.
  • the usable medium may be a magnetic medium, such as a floppy disk, a hard disk, and a magnetic tape; it may also be an optical medium, such as a digital video disc (digital video disc, DVD); and it may also be a semiconductor medium, such as a solid state drive (solid state drive). , SSD).

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Abstract

本申请实施例提供一种漫游方法，装置和系统。该方法包括：当终端设备无法接入第一PLMN时，所述终端设备接入第二PLMN，所述第二PLMN与所述第一PLMN之间的动态漫游协议被激活；所述终端设备接收来自所述第二PLMN的指示信息，所述指示信息用于指示所述第二PLMN与所述第一PLMN之间动态漫游协议去激活；所述终端设备根据所述指示信息向所述第一PLMN发送接入请求消息。。

Description

一种漫游的方法、装置及系统 技术领域
本申请实施例涉及通信技术领域，尤其涉及一种漫游的方法、装置及系统。
背景技术
在现有的通信网络中，当终端设备对应的归属公用陆地移动网(Home Public Land Mobile Network,HPLMN)发生故障时，该终端设备无法接入该HPLMN。通常情况下，HPLMN发生故障的区域还会存在其他运营商网络，但是这些运营商网络与HPLMN之间可能没有签订漫游协议。在这种情况下，现在技术并没有提供终端设备接入其他运营商网络的方法。
发明内容
本申请实施例提供一种漫游的方法、装置及系统，在终端设备对应的HPLMN发生故障时，使得设备能够接入到故障区域内的其他运营商网络。
第一方面，本申请实施例提供一种漫游方法包括：当终端设备无法接入第一PLMN时，所述终端设备接入第二PLMN，所述第二PLMN与所述第一PLMN之间的动态漫游协议被激活；所述终端设备接收来自所述第二PLMN的指示信息，所述指示信息用于指示所述第二PLMN与所述第一PLMN之间动态漫游协议去激活；所述终端设备根据所述指示信息向所述第一PLMN发送接入请求消息。
在一种可能的实现方式中，所述终端设备接收来自所述第二PLMN的指示信息，包括：所述终端设备接收来自所述第二PLMN的广播消息，所述广播消息包括所述指示信息。
在一种可能的实现方式中，所述广播消息还包括所述第一PLMN的标识信息，和/或，不允许所述终端设备接入所述第二PLMN的区域信息。
在一种可能的实现方式中，所述方法还包括：所述终端设备在所述第二PLMN中去注册。
在一种可能的实现方式中，所述终端设备接收来自所述第二PLMN的指示信息，包括：所述终端设备接收来自所述第二PLMN的去注册请求消息，所述去注册请求消息包括所述指示信息。
在一种可能的实现方式中，所述去注册请求消息还包括不允许所述终端设备接入所述第二PLMN的区域信息。
在一种可能的实现方式中，所述方法还包括：所述终端设备接入所述第二PLMN之前，所述终端设备接收来自所述第二PLMN的用于指示所述第二PLMN与所述第一PLMN之间的动态漫游协议被激活的指示信息。
在一种可能的实现方式中，所述方法还包括：所述终端设备接入所述第二PLMN之前，所述终端设备获取所述第二PLMN的信息。
在一种可能的实现方式中，所述第二PLMN的信息还包括如下信息中的至少一种：允 许所述终端设备接入所述第二PLMN的接入技术类型、允许所述终端设备接入所述第二PLMN的区域信息、所述第二PLMN的优先级信息。
第二方面，本申请实施例提供一种漫游方法包括：当终端设备无法接入第一PLMN时，第二PLMN中的核心网网元获取第一指示信息，所述第一指示信息用于指示激活所述第二PLMN与所述第一PLMN之间的动态漫游协议；所述核心网网元向所述终端设备发送所述第一指示信息。
在一种可能的实现方式中，所述核心网网元获取所述第一指示信息包括：所述核心网网元获取第一通知消息，所述第一通知消息包括所述第一指示信息。
在一种可能的实现方式中，所述第一通知消息还包括所述第一PLMN的信息，所述第一PLMN的信息包括所述第一PLMN的标识信息。
在一种可能的实现方式中，所述第一通知消息还包括如下信息中的至少一种：允许所述终端设备接入所述第二PLMN的接入技术类型、允许所述终端设备接入所述第二PLMN的区域信息、所述第二PLMN的优先级信息。
在一种可能的实现方式中，所述方法还包括：所述核心网网元根据所述允许所述终端设备接入所述第二PLMN的区域信息确定所述接入网设备，其中，所述接入网设备位于所述允许所述终端设备接入所述第二PLMN的区域内。
在一种可能的实现方式中，所述核心网网元为接入管理网元，所述核心网网元获取所述第一通知消息，包括：所述接入管理网元通过所述第二PLMN中的网络开放功能网元从网管网元获取所述第一通知消息。
在一种可能的实现方式中，所述方法还包括：所述核心网网元获取第二指示信息，所述在第二指示信息用于指示去激活所述第二PLMN与所述第一PLMN之间的动态漫游协议；所述核心网网元通过所述接入网设备向所述终端设备发送所述第二指示信息。
第三方面，本申请实施例提供一种通信装置，包括：处理单元，用于当所述通信装置无法接入第一PLMN时，将所述通信装置接入第二PLMN，所述第二PLMN与所述第一PLMN之间的动态漫游协议被激活；接收单元，用于接收来自所述第二PLMN的指示信息，所述指示信息用于指示所述第二PLMN与所述第一PLMN之间动态漫游协议去激活；发送单元，用于根据所述指示信息向所述第一PLMN发送接入请求消息。
在一种可能的实现方式中，该通信装置可以是终端设备。
第四方面，本申请实施例提供一种通信装置，包括：接收单元，用于当终端设备无法接入第一PLMN时，获取第一指示信息，所述第一指示信息用于指示激活第二PLMN与所述第一PLMN之间的动态漫游协议，所述通信装置为所述第二PLMN中的装置；发送单元，用于向所述终端设备发送所述第一指示信息。
在一种可能的实现方式中，所述接收单元用于获取第一通知消息，所述第一通知消息包括所述第一指示信息。
在一种可能的实现方式中，所述第一通知消息还包括所述第一PLMN的信息，所述第一PLMN的信息包括所述第一PLMN的标识信息。
在一种可能的实现方式中，所述第一通知消息还包括如下信息中的至少一种：允许所述终端设备接入所述第二PLMN的接入技术类型、允许所述终端设备接入所述第二PLMN的区域信息、所述第二PLMN的优先级信息。
在一种可能的实现方式中，所述通信装置还包括处理单元，用于根据所述允许所述终端设备接入所述第二PLMN的区域信息确定所述接入网设备，其中，所述接入网设备位于所述允许所述终端设备接入所述第二PLMN的区域内。
在一种可能的实现方式中，所述接收单元用于通过所述第二PLMN中的网络开放功能网元从网管网元获取所述第一通知消息。
在一种可能的实现方式中，所述接收单元还用于获取第二指示信息，所述在第二指示信息用于指示去激活所述第二PLMN与所述第一PLMN之间的动态漫游协议；所述发送单元还用于通过所述接入网设备向所述终端设备发送所述第二指示信息。
在一种可能的实现方式中，该通信装置可以是核心网网元，例如接入管理网元。
在本申请中，所述第二PLMN与所述第一PLMN具有相同的移动国家码，所述第二PLMN的移动网络码与所述第一PLMN的移动网络码不同。
在本申请中，所述第二PLMN与所述第一PLMN之间的动态漫游协议，包括：若所述终端设备能够接入所述第一PLMN，所述第二PLMN与所述第一PLMN之间的漫游协议去激活；若所述终端设备无法接入所述第一PLMN，所述第二PLMN与所述第一PLMN之间的漫游协议激活。
在本申请中，所述第一PLMN为归属公用陆地移动网HPLMN，第二PLMN为拜访公用陆地移动网VPLMN。
第五方面，本申请提供了一种通信装置，包括处理器，该处理器读取存储器中存储的计算机可读指令，以使得该通信装置执行上述第一方面或者第一方面任意一种可能的实现方式中的方法。
第六方面，本申请提供了一种通信装置，包括处理器，该处理器读取存储器中存储的计算机可读指令，以是的该通信装置执行上述第二方面或者第二方面任意一种可能的实现方式中的方法。
第七方面，本申请提供了一种通信系统。该通信系统包括上述第四方面或者第六方面中的通信装置以及与该通信装置连接的接入网设备。该通信装置通过该接入网设备与终端设备进行通信。
第八方面，本申请提供了一种计算机可读存储介质，包括计算机可读指令，当指令在计算机上运行时，使得计算机执行上述第一方面或者第二方面中任意一种方法。
第九方面，本申请提供了一种计算机程序产品，包括计算机程序，当程序在计算机上运行时，使得计算机执行上述第一方面或者第二方面中任意一种方法。
第十方面，本申请提供一种芯片或者芯片系统。该芯片或者芯片系统包括至少一个处理器和通信接口，通信接口和至少一个处理器耦合，处理器用于运行计算机程序或指令，以执行第一方面或第一方面的任意可能的实现方式中的方法，通信接口用于与芯片之外的其它模块进行通信。
附图说明
图1为本申请实施例适用的一种场景的示意图；
图2为本申请实施例适用的5G网络的示意图；
图3是本申请实施例的一种漫游方法的示意图；
图4是本申请实施例的另一种漫游方法的示意图；
图5是本申请实施例的再一种漫游方法的示意图；
图6是本申请实施例的又一种漫游方法的示意图；
图7为本申请实施例提供的一种通信装置的结构示意图；
图8为本申请实施例提供的另一种通信装置的结构示意图；
图9为本申请实施例提供的一种芯片或者芯片系统的结构示意图。
具体实施方式
为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了“第一”、“第二”等词语对相似内容进行区分。例如，第一PLMN和第二PLMN仅仅是为了区分不同的PLMN，并不对其先后顺序进行限定。本领域技术人员可以理解“第一”、“第二”等词语并不对数量和执行次序进行限定，并且“第一”、“第二”等词语也并不限定一定不同。
需要说明的是，本申请中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其他实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中a，b，c可以是单个，也可以是多个。
在通信网络中，终端设备要想获得网络提供的服务，就需要选择一个PLMN、驻留在一个合适的小区，并成功完成注册过程。其中，PLMN选择依据操作模式可以分为自动模式和手动两种方式。
自动模式：终端设备自动根据PLMN列表中各PLMN的优先级次序，从最高优先级的PLMN开始尝试，如果成功，则在该PLMN选择合适小区进行驻留。如果某个高优先级的PLMN选择失败，则终端设备尝试次优先级的PLMN，直到终端设备能成功注册到某个PLMN为止。
手动模式:终端设备会向用户呈现当前可用PLMN的列表(例如：按优先次序呈现)。用户根据呈现的PLMN的列表选择合适的PLMN接入。
在自动模式中，依据是否存在先验信息可以分为基于先验信息的PLMN选择和初始PLMN选择。
基于先验信息的PLMN选择，是指终端设备记录最近一次(例如：当前)注册的PLMN(Registered PLMN，RPLMN)。当该终端设备下一次开机或回到覆盖区时，以最高优先级选择RPLMN。如果RPLMN不可用，再按照初始选择的方法进行PLMN选择。
初始PLMN选择，是指中终端设备在没有先验信息的情况下，按照全球用户识别模块(Universal Subscriber Identity Module,USIM)中记录的各种PLMN及其优先级来选择PLMN。在一种可能的实现方式中，这些PLMN可以按照如下优先级由高到低排列(1)HPLMN；(2)等效HPLMN(Equivalent HPLMN,EHPLMN)；(3)用户控制的PLMN(User Controlled PLMN)；(4)运营商控制的PLMN(Operator Controlled PLMN)；(5)按照服务质量要求选择的PLMN；(6)其他PLMN。其中，用户控制的PLMN是指终端设备的用户可以根据偏好选择对应的PLMN。运营商控制的PLMN是在制作SIM时，运营商将与该运营商签署了漫游协议的其他运营商的PLMN存储到该终端设备SIM中，终端设备可以根据该存储的PLMN选择对应的PLMN接入。按照服务质量要求选择的PLMN可以是一个指示信息，用于指示终端设备按照服务质量的要求选择对应的PLMN，例如：选择参考信号接收功率(Reference Signal Receiving Power,RSRP)不低于-110dBm的网络。若上述(1)～(5)的PLMN均无法接入，则终端设备可以选择其他可以接入的PLMN。
如果终端设备所在的区域存在多个可选的PLMN，但是终端设备在该多个可选的PLMN中的每一个PLMN的注册尝试都失败了，这些PLMN将被终端设备设置为被禁止访问的PLMN。例如：如果终端设备接收到PLMN不被允许“PLMN not allowed”的原因信息，终端设备会把该PLMN加入SIM里的禁止PLMN“forbidden PLMN”列表。
通常情况下，如果同一地区多个运营商间没有签订漫游协议，那么某个运营商的终端设备接入没有签订漫游协议的其他运营商的PLMN失败，则终端设备会将该失败的PLMN放入forbidden PLMN列表。如果该终端设备是自动选网模式，则终端设备后续不会再尝试接入该forbidden PLMN列表中的任一PLMN。如果后续用户手动尝试接入该PLMN，并且注册成功的话，终端设备会删除forbidden PLMN列表里这个PLMN。在自动选网模式或手动选网模式下，一旦forbidden PLMN列表生成，即使终端设备关机或者拔SIM卡，forbidden PLMN列表里的PLMN也不会自动删除。
请参阅图1，图1是本申请实施例适用的一种场景的示意图。当终端设备无法接入第一PLMN时(例如：第一PLMN发生故障)，终端设备可以根据第一PLMN和第二PLMN之间的动态漫游协议接入第二PLMN。
在一种可能的实现方式中，第一PLMN为HPLMN，第二PLMN为拜访公用陆地移动网(Visited Land Mobile Network,VPLMN)。
在一种可能的实现方式中，第一PLMN与第二PLMN具有相同的移动国家码(Mobile Country Code,MCC)，第一PLMN的移动网络码(Mobile Network Code,MNC)与第二PLMN的移动网络码不同。
在本申请的各实施例中，PLMN发生故障可以是指PLMN在终端设备所在区域的发生故障，并不一定指整个PLMN发生故障。
请参阅图2，图2是本申请实施例适用的5G网络的示意图。图2中的5G网络采用服务化的网络架构。本申请的实施例也可以采用其他5G网络架构，在此不做限定。
图2所示的5G网络架构包括：接入网(access network，AN)节点、以及多个网络功 能(network function，NF)网元。其中，多个NF网元可以包括：用户面功能(user plane function，UPF)网元、接入和移动性管理功能(access and mobility management function，AMF)网元、会话管理功能(session management function，SMF)网元、策略控制功能(policy control function，PCF)网元、网络切片选择功能(network slice selection function，NSSF)网元、统一数据管理(unified data management，UDM)网元、网络仓库功能(network repository function，NRF)网元、网络开放功能(network exposure function，NEF)网元、数据存储功能网元(unified data repository，UDR)、网管网元等。另外，网络架构还可以包括终端设备、数据网(data network，DN)节点、应用功能(application function，AF)网元等。
在本申请的实例例中，网管网元可以是操作维护管理(Operation Administration and Maintenance,OAM)系统。OAM系统可以通过NEF网元与其他NF网元通信。OAM系统也可以直接与其他NF网元通信，本申请实施例不做限定。
图2中的各网元既可以是硬件设备中的网络元件，也可以是在专用硬件上运行的软件功能，或者是平台(例如，云平台)上实例化的虚拟化功能。
需要说明的是，在上述图2所示的网络架构中，仅仅是示例性说明整个网络架构中所包括的网元。在本申请实施例中，并不限定网络架构中所包括的网元，比如，在本申请实施例中，网络架构中可包括上述图2所示所有网元中的任一个网元或任多个网元。
其中，终端设备是一种具有无线通信功能的电子设备，可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。终端设备可以是用户设备(user equipment，UE)、手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端设备、无人驾驶(self driving)中的无线终端设备、远程医疗(remote medical)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端设备、智慧城市(smart city)中的无线终端设备、智慧家庭(smart home)中的无线终端设备等。
AN节点可以是向UE提供无线接入的设备，包括但不限于演进型Node B(evolved node B，简称eNB)、无线保真访问接入点(wireless-fidelity access point，简称WiFi AP)、全球微波互联接入基地站(worldwide interoperability for microwave access base station，简称WiMAX BS)、5G网络中的基站(例如，gNodeB，gNB)等。AN节点还可以为(radio access network，RAN)节点或者后续演进网络中的接入节点。
UPF网元可以对报文进行处理，例如：UPF可以执行用户数据转发、路由、数据统计、限速、统计上报等功能。
AMF网元可以进行移动网络中的移动性管理，如用户位置更新、用户注册网络、用户切换等。AMF网元可以通过N1接口接入UE的非接入层(non-access stratum，NAS)信令(包括会话管理(session management，SM)信令)，还可以通过N2接口接入RAN的信令，完成用户的注册流程和SM信令的转发以及移动性管理。AMF网元可以转发SMF网元与UE之间的消息。
SMF网元可以对移动网络中的会话进行管理，如会话建立、会话修改、会话释放等。
PCF网元可以管理用户策略，包括移动性相关策略、协议数据单元(Protocol Data Unit， PDU)会话相关策略，如服务质量(quality of service，QoS)策略、计费策略等。
NSSF网元用于选择网络切片(network slice)。网络切片是一个用于支持特定网络能力与网络特性的逻辑隔离的网络，可以端到端(end to end，E2E)的包括整个网络，也可以部分网络功能在多个网络切片中共享，是满足3GPP提出的第五代5G移动通信技术关于网络差异化需求的关键技术。通常，不同网络切片的网络特征并不相同，且要求网络切片之间相互隔离，互不影响。如增强实现(augmented reality，AR)或虚拟实现(virtual reality，VR)业务的网络切片要求大带宽、低时延；物联网(internet of things，IOT)业务的网络切片要求支持海量终端接入，但带宽小，对时延没要求。
UDM网元负责管理用户的签约数据等信息，UDM网元可以向AMF、SMF等网元提供用户的签约数据。
UDR网元存储网络中结构化的数据，包括用户签约数据信息和用户策略。UDM可以从UDR读取终端签约数据，PCF可以从UDR读取用户策略信息。UDR也可以分成两个部分分别于UDM和PCF网元合并，而不独立部署。
NRF网元存储其他功能网元的注册信息，并根据这些注册信息提供网络功能网元之间互相查找发现的服务。
NEF网元负责网络对外开放服务和能力的授权和控制，位于运营商网络之外的AF网元可以通过NEF网元向网络提供网络数据，也可以通过NEF获得网络的对外开放的服务和数据。
DN用于向UE提供数据服务，可以为用户的PDU会话的访问目的地。DN可以是PDN网络，如因特网(internet)、IP多媒体业务(IP multi-media Service，IMS)等。
AF网元可以发送请求以影响SMF路由策略、以及负责在本地DN中选择和重新定位应用程序。AF主要对转发面行为进行动态策略/计费控制。这些业务需要动态策略和计费控制。AF传送PCF需要的动态会话信息，
在本申请的实施例中，第一PLMN和第二PLMN可以均采用图2所示的架构。当然第一PLMN和第二PLMN也可以采用其他网络架构，例如：演进分组核心网(Evolved Packet Core network,EPC)架构或者未来演进的系统架构，在此不做限定。
请参阅图3，图3是本申请实施例的一种漫游方法的示意图。该漫游方法包括：
301、当终端设备无法接入第一PLMN时，第二PLMN中的核心网网元获取第一指示信息，所述第一指示信息用于指示第一PLMN与第二PLMN之间的动态漫游协议被激活。
在本申请的实施例中，第一PLMN与第二PLMN之间具有动态漫游协议。在一种可能的实现方式中，第一PLMN与第二PLMN之间具有动态漫游协议，包括：若终端设备能够接入第一PLMN，第一PLMN与第二PLMN之间的漫游协议去激活；若终端设备无法接入第一PLMN，第一PLMN与第二PLMN之间的漫游协议激活。例如，第一PLMN可以是终端设备的HPLMN，第二PLMN可以是终端设备的VPLMN。
若终端设备能够接入第一PLMN，第一PLMN与第二PLMN之间的漫游协议去激活可以是指第一PLMN与第二PLMN之间没有漫游协议，或者，第一PLMN与第二PLMN之间的漫游协议不可用。
若终端设备无法接入第一PLMN，第一PLMN与第二PLMN之间的漫游协议激活是指第一PLMN与第二PLMN之间存在漫游协议，或者，第一PLMN与第二PLMN之间的 漫游协议可用。
可以理解为：第一PLMN与第二PLMN之间具有临时的漫游协议，当终端设备能够接入第一PLMN时，该临时的漫游协议失效，当终端设备无法接入第一PLMN时，该临时的漫游协议生效。
在另一种可能的实现方式中，第一PLMN与第二PLMN之间具有动态漫游协议，包括：若满足第一条件，该第一PLMN与第二PLMN之间的漫游协议有效。该第一条件可以是第一PLMN发生故障，或者，终端设备无法接入第一PLMN。
在本申请中，动态漫游协议也可以称为临时漫游协议，本申请并不做限定。
在本申请中，该核心网网元是接入管理网元，当第一PLMN和第二PLMN采用5G网络架构时，接入管理网元可以是AMF网元；当第一PLMN和第二PLMN采用4G网络架构时，接入管理网元可以是移动性管理实体(mobility management entity，MME)。在本申请的实施例中，以接入管理网元为AMF网元进行举例说明。
在一种可能的实现方式中，第二PLMN中的核心网网元获取第一通知消息，该第一通知消息包括第一指示信息。当该核心网网元为AMF网元时，AMF网元可以通过第二PLMN中的网络开放功能网元从网管网元(例如：OAM网元)获取第一通知消息。AMF网元也可以直接从OAM网元获取第一通知消息，本申请实施例不做限定。
在一种可能的实现方式中，当第一PLMN发生故障，第一PLMN的OAM系统可以向第二PLMN2的OAM系统发送指示消息，用于指示激活第一PLMN与第二PLMN之间的动态漫游协议。在另一种可能的实现方式中，第一PLMN与第二PLMN之间的动态漫游协议可以由第二PLMN发起激活。例如当第二PLMN获知第一PLMN发生故障，第二PLMN的OAM系统决定激活第一PLMN与第二PLMN之间的动态漫游协议。
在一种可能的实现方式中，第一通知消息还包括所述第一PLMN的信息。第一PLMN的信息可以包括第一PLMN的标识信息。这样，终端设备就可以确定与第二PLMN具有动态漫游协议的PLMN。具体的，该第一PLMN的标识信息可以为第一PLMN的标识(identify,ID)。
在一种可能的实现方式中，第一通知消息还包括允许终端设备接入第二PLMN的区域信息。具体的，区域信息可以是跟踪区(Tracking Area,TA)标识列表(TA list)，该列表包含一个或者多个跟踪区标识。示例的，区域信息可以是在第一PLMN发生故障的区域内，第二PLMN中允许终端设备接入第二PLMN的区域信息。可以理解为，第二PLMN中允许终端设备接入第二PLMN的区域与第一PLMN发生故障的区域存在重叠区域，这样位于第一PLMN发生故障区域的终端设备可以在无需移动的前提下，该终端设备允许接入第二PLMN，提升终端设备的业务体验。
在一种可能的实现方式中，第一通知消息还可以进一步的包括终端设备接入第二PLMN的策略信息。该策略信息包括如下信息中的至少一种：允许所述终端设备接入第二PLMN的接入技术类型、第二VPLMN的优先级信息。其中，第二PLMN的优先级信息可以理解为，当终端设备依次尝试接入多个PLMN时，在这些多个PLMN中，终端设备接入第二PLMN的优先级或者终端设备接入第二PLMN的顺序。第二PLMN的优先级信息也可以称为第二PLMN在终端设备选网列表中的优先级，在此不做限定。
在一种可能的实现方式中，允许终端设备接入第二PLMN的接入技术类型包括第三代 合作计划(3rd Generation Partnership Project,3GPP)接入技术，和/或，非3GPP(Non-3GPP)接入技术。
在一种可能的实现方式中，第二PLMN的优先级信息包括第二PLMN的优先级低于如下任意一个PLMN的优先级：第一PLMN的优先级、第一PLMN的等效PLMN(Equivalent PLMN,EPLMN)的优先级、用户控制的PLMN(User Controlled PLMN)的优先级、运营商控制的(PLMN Operator Controlled PLMN)的优先级。当终端设备尝试接入PLMN时，终端设备的选网顺序为：(1)第一PLMN、(2)第一PLMN的等效PLMN、(3)用户控制的PLMN、(4)运营商控制的PLMN、(5)第二PLMN。即，当终端设备依次尝试接入(1)第一PLMN、(2)第一PLMN的等效PLMN、(3)用户控制的PLMN、(4)运营商控制的PLMN，但是均无法成功接入时，终端设备可以尝试接入第二PLMN。
在另一种可能的实现方式中，第二PLMN的优先级信息包括第二PLMN的优先级高于用户按照服务质量要求选择的PLMN的优先级，或者第二PLMN的优先级低于运营商控制的PLMN的优先级并且高于用户按照服务质量要求选择的PLMN的优先级。当终端设备无法接入运营商控制的PLMN时，终端设备可以尝试接入第二PLMN。如果无法接入第二PLMN，那么终端设备可以尝试接入户按照服务质量要求选择的PLMN。
在一种可能的实现方式中，当具有多个第二PLMN时，第二PLMN的优先级信息还可以包括各个第二PLMN的优先级。
302、核心网网元向终端设备发送所述第一指示信息。
在一种可能的实现方式中，核心网网元根据允许终端设备接入第二PLMN的区域信息确定接入网设备。其中，该接入网设备位于允许终端设备接入第二PLMN的区域内。核心网网元通过确定的接入网设备向终端设备发送所述第一指示信息。实例性的，如果允许终端设备接入第二PLMN的区域内包含多个接入网设备，则多个接入网设备可以同时向终端设备发送广播消息。
在一种可能的实现方式中，接入网设备向终端设备发送广播消息。该广播消息包括该第一指示信息。该广播消息还可以包括第一PLMN的标识信息。这样，终端设备就可以确定与第二PLMN具有动态漫游协议的PLMN。
在一种可能的实现方式中，广播消息还包括允许终端设备接入第二PLMN的区域信息。该区域信息具体参见301的描述。
在一种可能的实现方式中，广播消息还可以进一步的包括UE接入第二PLMN的策略信息。该策略信息具体参见301的描述。
303、终端设备接入第二PLMN。
具体的，终端设备根据第一指示信息接入第二PLMN。
在一种可能的实现方式中，终端设备可以根据广播消息中包括的第一PLMN的标识信息确定该第一PLMN为HPLMN。然后，终端设备根据第一指示信息向第二PLMN发送接入请求消息。该接入请求消息可以是注册请求(registration request)消息。
在一种可能的实现方式中，终端设备根据接收到的接入第二PLMN的策略信息向第二PLMN发送接入请求消息。例如：终端设备根据策略信息确定选择哪种接入技术向第二PLMN发送接入请求消息。又例如：终端设备根据策略信息确定第二PLMN的优先级，然后根据第二PLMN的优先级向第二PLMN发送接入请求消息。
通过上述操作301～303，当第一PLMN发生故障而导致终端设备无法接入第一PLMN时，终端设备可以接入第二PLMN。
当第一PLMN故障恢复时，可以通过如下操作304～306，使得终端设备重新接入到第一PLMN。
304、第二PLMN中的核心网网元获取第二指示信息，第二指示信息用于指示所述第二PLMN与所述第一PLMN之间动态漫游协议去激活。
在一种可能的实现方式中，第二PLMN中的核心网网元获取第二通知消息，该第二通知消息包括第二指示信息。核心网网元获取第二通知消息的方式与核心网网元获取第一通知消息的方式类似，具体参加301的描述。
在一种可能的实现方式中，当第一PLMN故障恢复时，第一PLMN的OAM系统可以向第二PLMN的OAM系统发送指示消息，用于指示第一PLMN与第二PLMN之间的动态漫游协议去激活。在另一种可能的实现方式中，第一PLMN与第二PLMN之间的动态漫游协议可以由第二PLMN发起去激活。例如当第二PLMN获知第一PLMN故障恢复，第二PLMN的OAM系统决定去激活第一PLMN与第二PLMN之间的动态漫游协议。
在一种可能的实现方式中，第二通知消息还包括所述第一PLMN的信息。第一PLMN的信息可以包括第一PLMN的标识信息。这样，终端设备就可以确定无法态漫游到第二PLMN。
在一种可能的实现方式中，第二通知消息还包括不允许终端设备接入第二PLMN的区域信息。具体的，区域信息可以是跟踪区标识列表(TA list)，该列表包含一个或者多个跟踪区标识。示例的，区域信息可以是在第一PLMN故障恢复后，第二PLMN中不允许终端设备接入第二PLMN的区域信息。
需要说明的是，步骤302中，第二PLMN中允许终端设备接入第二PLMN的区域信息与步骤304中不允许终端设备接入第二PLMN的区域信息可以完全相同、部分相同或者完全不同；示例的，为了描述方便，将第二PLMN中允许终端设备接入第二PLMN的区域信息称为第一区域，该第一区域包含第一跟踪区标识列表；将不允许终端设备接入第二PLMN的区域信息称为第二区域，该第二区域包含第二跟踪区标识列表。其中，第一跟踪区标识列表内的一个或者多个跟踪区标识与第二跟踪区标识列表内的一个或者多个跟踪区标识可以完全相同、部分相同或者完全不同，本发明不做限定。
305、核心网网元向终端设备发送所述第二指示信息。
在一种可能的实现方式中，核心网网元根据不允许终端设备接入第二PLMN的区域信息确定接入网设备。其中，该接入网设备位于不允许终端设备接入第二PLMN的区域内。核心网网元通过确定的接入网设备向终端设备发送所述第二指示信息。
核心网网元向接入网设备发送第二指示信息。接入网设备可以采用如下两种方式向终端设备发送所述第二指示信息。
方式一
接入网设备向终端设备发送广播消息。该广播消息包括该第二指示信息。进一步的，该广播消息还可以包括第一PLMN的标识信息。终端设备可以根据第一PLMN的标识信息确定该第一PLMN为HPLMN。这样，终端设备就可以确定无法动态漫游到第二PLMN。
在一种可能的实现方式中，如果不允许终端设备接入第二PLMN的区域内包含多个接 入网设备，则多个接入网设备可以同时向终端设备发送广播消息。
在一种可能的实现方式中，广播消息还包括不允许终端设备接入第二PLMN的区域信息。具体的，区域信息可以是跟踪区标识列表(TA list)，该列表包含一个或者多个跟踪区标识。
当终端设备收到该广播消息后，向该第二PLMN发送去注册请求(deregistration request)消息，从而使得终端设备在该第二PLMN去注册。
方式二
接入网设备向终端设备发送去注册请求消息。该去注册请求消息包括第二指示信息。
在一种可能的实现方式中，去注册请求消息还包括不允许终端设备接入第二PLMN的区域信息。具体参见方式一的描述。
306、终端设备接入第一PLMN。
具体的，终端设备根据第二指示信息向第一PLMN发送接入请求消息，从而接入第一PLMN。该接入请求消息可以是注册请求消息。
在本申请的实施例中，若第一PLMN发生故障导致终端设备无法接入第一PLMN时，终端设备根据来自第二PLMN的第一指示信息向第二PLMN发送接入请求，从而可以减少终端设备业务等待时间，提升用户的业务体验。进一步的，当第一PLMN故障恢复后，终端设备根据来自第二PLMN的第二指示信息向第一PLMN发送接入请求，从而使得终端设备可以及时返回到第一PLMN。
下面以第一PLMN为HPLMN，第二PLMN为VPLMN，终端设备为UE为例，详细说明本申请实施例的漫游方法。HPLMN包括接入网设备RAN1和接入管理网元AMF1。VPLMN包括接入网设备RAN2、接入管理网元AMF1。NEF网元以及OAM网元。当然，HPLMN和VPLMN也可以包括其他网元，在此不做限定。
在图4所示的实施例中，当HPLMN故障时，VPLMN开启与HPLMN之间的动态漫游。具体的，该方法包括：
401、UE无法接入HPLMN。
当UE初始接入HPLMN后，若HPLMN发生故障，则UE无法接入到HPLMN。
402、OAM网元向NEF网元发送第一指示信息。
当VPLMN获知HPLMN因故障而无法接入，VPLMN激活与HPLMN之间的动态漫游，允许该HPLMN的UE接入到该VPLMN中。在一种可能的实现方式中,VPLMN中的OAM网元通过第三方或直接通过HPLMN获取第一通知消息并将该第一通知消息发送至NEF网元。该第一通知消息包括第一指示信息。第一指示信息用于指示HPLMN与VPLMN之间的动态漫游协议被激活。该第一通知消息还可以包括HPLMN的标识信息。通过该HPLMN的标识信息，可以确定允许漫游到该VPLMN的PLMN。
在一种可能的实现方式，该第一通知消息还包括允许终端设备接入VPLMN的区域信息，和/或，UE接入VPLMN的策略信息。允许终端设备接入VPLMN的区域信息和UE接入VPLMN的策略信息具体参见301中允许终端设备接入第二PLMN的区域信息和UE接入第二PLMN的策略信息。
403、NEF网元向AMF2网元发送第一指示信息。
在一种可能的实现方式中，NEF网元收到来自OAM网元的第一通知消息后，根据允许终端设备接入VPLMN的区域信息确定对应的AMF2。其中，AMF2的服务区域包括在上述允许终端设备接入VPLMN的区域内。具体的，NEF网元可以根据网络拓扑查找出AMF2的标识。NEF网元向AMF2网元发送上述第一指示信息。
在一种可能的实现方式中，NEF网元向AMF2发送第一通知消息，该第一通知消息包括第一指示信息。该第一通知消息还可以包括如下内容中的至少一个：HPLMN的标识信息、允许终端设备接入VPLMN的区域信息，UE接入VPLMN的策略信息。具体参见402的描述。
在一种可能的实现方式中，步骤402中的OAM网元还可以根据网络拓扑查找出AMF2的标识，直接向AMF2发送第一指示信息。
404、AMF2网元向RAN2发送第一指示信息。
在一种可能的实现方式中，AMF2网元收到来自NEF网元或者OAM网元的第一通知消息后，根据允许终端设备接入VPLMN的区域信息确定对应的RAN2。其中，RAN2的服务区域包括在上述允许终端设备接入VPLMN的区域内。具体的，AMF2网元可以根据网络拓扑查找出RAN2的标识。AMF2网元向RAN2发送上述第一指示信息。
在一种可能的实现方式中，AMF2网元向RAN2发送第一通知消息，该第一通知消息还可以包括如下内容中的至少一个：HPLMN的标识信息、允许终端设备接入VPLMN的区域信息，UE接入VPLMN的策略信息。具体参见402的描述。
405、RAN2网元向UE发送通知消息。
在一种可能的实现方式中，RAN2接收到第一指示信息后，根据第一指示信息向UE发送广播消息。该通知消息即该广播消息。该广播消息包括该第一指示信息。
在一种可能的实现方式中，该广播消息还包括如下内容中的至少一个：HPLMN的标识信息、允许终端设备接入VPLMN的区域信息，UE接入VPLMN的策略信息。具体参见402的描述。
406、UE选择VPLMN。
在一种可能的实现方式中，UE接收到广播消息后，若广播消息中的HPLMN与该UE的HPLMN相同，则采用对应的策略信息选择接入到该VPLMN。
在一种可能的实现方式中，若策略信息包括该VPLMN的优先级信息，则UE根据该VPLMN的优先级顺序选择接入该VPLMN。又例如：若策略信息包括接入技术的类型，则UE采用对应的接入技术类型接入该VPLMN。
407、UE向VPLMN中的AMF2发送注册请求消息。
通过上述401～407的操作，当UE的HPLMN发生故障后，UE可以接入与HPLMN之间具有动态漫游协议的VPLMN。
当HPLMN故障恢复时，图5所示的实施例提供一种UE从VPLMN返回HPLMN的方法。具体的，该方法包括：
501～503、当HPLMN发生故障后，UE无法接入HPLMN，UE可以通过图4实施例的方法成功接入到VPLMN。具体参见步骤401～407的描述。
504、OAM网元向NEF网元发送第二指示信息。
当VPLMN获知HPLMN故障恢复后，VPLMN去激活与HPLMN之间的动态漫游， 不允许该HPLMN的UE接入到该VPLMN中。在一种可能的实现方式中,OAM网元通过第三方或直接通过HPLMN获取第二通知消息。该第二通知消息包括第二指示信息。第二指示信息用于指示HPLMN与VPLMN之间的动态漫游协议去激活。该第二通知消息还可以包括HPLMN的标识信息。通过该HPLMN的标识信息，可以确定不允许漫游到该VPLMN的PLMN。
在一种可能的实现方式，该第二通知消息还不包括允许终端设备接入VPLMN的区域信息。示例性的，不允许终端设备接入VPLMN的区域信息可以是跟踪区标识列表(TA list)，该列表包含一个或者多个跟踪区标识。
505、NEF网元向AMF2网元发送第二指示信息。
在一种可能的实现方式中，NEF网元收到来自OAM网元的第二通知消息后，根据不允许终端设备接入VPLMN的区域信息确定对应的AMF2。其中，AMF2的服务区域包括在上述不允许终端设备接入VPLMN的区域内。具体的，NEF网元可以根据网络拓扑查找出AMF2的标识。NEF网元向AMF2网元发送上述第二指示信息。
在一种可能的实现方式中，NEF网元向AMF2发送第二通知消息，该第二通知消息包括第二指示信息。该第二通知消息还可以包括如下内容中的至少一个：HPLMN的标识信息、不允许终端设备接入VPLMN的区域信息。具体参见504的描述。
在一种可能的实现方式中，步骤504中的OAM网元还可以根据网络拓扑查找出AMF2的标识，直接向AMF2发送第二指示信息。
506、AMF2网元向RAN2发送第二指示信息。
在一种可能的实现方式中，AMF2网元收到来自NEF网元或者OAM网元的第二通知消息后，根据不允许终端设备接入VPLMN的区域信息确定对应的RAN2。其中，RAN2的服务区域包括在上述不允许终端设备接入VPLMN的区域内。具体的，AMF2网元可以根据网络拓扑查找出RAN2的标识。AMF2网元向RAN2发送上述第二指示信息。
在一种可能的实现方式中，AMF2网元向RAN2发送第二通知消息，该第二通知消息还可以包括如下内容中的至少一个：HPLMN的标识信息、不允许终端设备接入VPLMN的区域信息。具体参见504的描述。
507、RAN2网元向UE发送第二通知消息。
在一种可能的实现方式中，RAN2接收到第二指示信息后，根据第二指示信息向UE发送广播消息。该第二通知消息即可是该广播消息。该广播消息包括该第二指示信息。
在一种可能的实现方式中，该广播消息还包括如下内容中的至少一个：HPLMN的标识信息、不允许终端设备接入VPLMN的区域信息。具体参见504的描述。
508、UE向AMF2发送去注册请求消息。
在一种可能的实现方式中，UE接收到广播消息后，若广播消息中的HPLMN与该UE的HPLMN相同，该UE根据该第二指示信息获知HPLMN与VPLMN之间的动态漫游协议去激活。因此，UE向AMF2发送去注册请求消息，触发UE从VPLMN中退网。
509、UE选择HPLMN。
在一种可能的实现方式中，UE接收到广播消息后，根据该第二指示信息获知HPLMN与VPLMN之间的动态漫游协议去激活。UE可以根据自身存储的PLMN选择列表选择接 入HPLMN。
510、UE向HPLMN中的AMF1发送注册请求消息。
通过上述504～510的操作，当HPLMN故障恢复时，UE可以从VPLMN返回HPLMN。
当HPLMN故障恢复时，图6所示的实施例提供另一种UE从VPLMN返回HPLMN的方法。具体的，该方法包括：
605～605具体参见501～505的描述。
606、AMF2网元向RAN2发送去注册请求消息。
在一种可能的实现方式中，AMF2网元收到来自NEF网元或者OAM网元的第二通知消息后，AMF2网元判断当前注册到该AMF2的UE对应的HPLMN是否与第二通知消息中包含的HPLMN相同；如果相同，进一步地，AMF2网元根据该第二通知消息包括的不允许终端设备接入VPLMN的区域信息判断该UE当前所在位置是否属于该区域内；如果属于，AMF2对该UE发起去注册流程。具体地，AMF2网元向RAN2发送去注册请求消息。该去注册请求消息包括该第二指示信息。
在一种可能的实现方式中，该注册请求消息还可以包括如下内容中的至少一个：不允许终端设备接入VPLMN的区域信息。具体参见504的描述。
607、RAN2网元向UE发送去注册请求消息。
在一种可能的实现方式中，RAN2接收到去注册请求消息后，向UE发送去注册请求消息。该去注册请求消息包括该第二指示信息。
UE接收到去注册请求消息后，根据该第二指示信息获知HPLMN与VPLMN之间的动态漫游协议去激活。因此，UE从VPLMN中退网。
608～609具体参见509～510的描述。
通过上述604～609的操作，当HPLMN故障恢复时，UE也可以从VPLMN返回HPLMN。
在一种可能的实现方式中，UE存储的PLMN选择列表中，可以包括动态漫游PLMN的信息，如表1所示。
表1
PLMN优先级 PLMN列表
1 HPLMN或者EHPLM
2 用户控制的PLMN
3 运营商控制的PLMN
4 动态漫游PLMN
5 按照服务质量要求选择的PLMN
6 其他PLMN
在表1中，PLMN的选网优先级按照从1到6的顺序来表示从高到低的顺序，位于顺序“1”的PLMN对应的选网优先级最高，位于顺序“6”的PLMN对应的的选网优先级最低。例如：HPLMN或者EHPLMN的优先级最高。用户控制的PLMN具有第二等级的优先级。进一步的，表1还可以包括该用户控制的PLMN对应的接入技术类型。运营商控制的PLMN具有第三等级的优先级。进一步的，表1还可以包括该运营商控制的PLMN对应的接入技术类型。动态漫游PLMN即指上述的第二PLMN。动态漫游PLMN具有第 四等级的优先级。当终端设备获取到第二PLMN的信息后，将该第二PLMN的信息储存到动态漫游PLMN中。按照服务质量要求选择的PLMN具有第五等级的优先级。按照服务质量要求选择的PLMN是指终端设备根据各PLMN的信号质量和/或接入技术类型选择满足质量要求的PLMN。
需要说明的是，第二PLMN的信息(即表1中的动态漫游PLMN)只有在UE获取第二PLMN的信息之后才会添加到表1中，可以理解为，表1中的动态漫游PLMN是终端设备根据接收到的动态漫游PLMN信息动态生成的。在UE获取第二PLMN的信息之前，终端设备的PLMN选择列表不包括第二PLMN的信息，即表1中不包含第二PLMN的信息，那么终端设备在选网过程中也不会考虑第二PLMN的信息。
在一种可能的方式中，上述表1中的内容可以存储到终端设备的用户识别模块(Subscriber Identity Module,SIM)中。在一种可能的实现方式中，若终端设备采用自动选网的方式接入PLMN，则终端设备可以按照表1中的PLMN的优先级依次选择对应的PLMN接入。
在图4～图6实施例中，相同或者相似的内容可以具体参见图3实施例的描述。
图7是本申请实施例中的一种通信装置的示意图。具体的，包括处理单元701、接收单元702、发送单元703。该通信装置还可以包括存储单元704。处理单元701、接收单元702、发送单元703以及存储单元704可以是在物理上相互分离的单元，也可以是集成到一个或者多个物理单元中，在此不做限定。
接收单元702和发送单元703用于实现处理单元701与其他单元或者网元的内容交互。具体的，发送单元703可以是发送电路或者发送器。接收单元702可以是接收电路或者接收器。发送单元703和接收单元702还可以是该通信装置的收发信机。发送单元703和接收单元702还可以是处理单元701的通信接口或者收发电路。可选的，发送单元703和接收单元702可以是一个收发芯片。
虽然图7中仅仅示出了一个发送单元703和一个接收单元702，该通信装置也可以包括多个发送单元703和多个接收单元702。发送单元703和接收单元702还可以是一个或者多个收发单元的子单元。
处理单元701用于实现通信装置对数据的处理。处理单元701可以是处理电路，也可以是处理器。其中，处理器可以是中央处理器(central processing unit，CPU)，网络处理器(network processor，NP)或者CPU和NP的组合。处理器还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路(application-specific integrated circuit，ASIC)，可编程逻辑器件(programmable logic device，PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device,CPLD)，现场可编程逻辑门阵列(field-programmable gate array，FPGA)，通用阵列逻辑(Generic Array Logic，GAL)或其任意组合。
虽然图7中仅仅示出了一个处理单元701，通信装置也可以包括多个处理单元或者处理单元701包括多个子数据处理单元。具体的，处理器可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。
存储单元704用于存储处理单元701执行的计算机指令。存储单元704可以是存储电路也可以是存储器。存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、 可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。
存储单元704可以是独立于处理单元701的单元，也可以是处理单元701中的存储单元，在此不做限定。虽然图7中仅仅示出了一个存储单元，通信装置也可以包括多个存储单元或者存储单元包括多个子存储单元。
在本申请的各实施例中，处理单元701可以通过发送单元703和接收单元702与其他网元进行内容交互，例如：处理单元701获取或者接收来自其他网元的内容。
一种可能的实现方式中，处理单元701、发送单元703、接收单元702以及存储单元704可以通过总线相互连接。总线可以是外设部件互连标准(peripheral component interconnect，PCI)总线或扩展工业标准结构(extended industry standard architecture，EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。
该通信装置可以是图3-图6实施例中的终端设备。具体的，通信装置包括：处理单元，用于当所述通信装置无法接入第一PLMN时，将所述通信装置接入第二PLMN，所述第二PLMN与所述第一PLMN之间的动态漫游协议被激活；接收单元，用于接收来自所述第二PLMN的指示信息，所述指示信息用于指示所述第二PLMN与所述第一PLMN之间动态漫游协议去激活；发送单元，用于根据所述指示信息向所述第一PLMN发送接入请求消息。
在一种可能的实现方式中，所述接收单元用于接收来自所述第二PLMN的广播消息，所述广播消息包括所述指示信息。
在一种可能的实现方式中，所述广播消息还包括所述第一PLMN的标识信息，和/或，不允许所述通信装置接入所述第二PLMN的区域信息。
在一种可能的实现方式中，所述处理单元还用于将所述通信装置在所述第二PLMN中去注册。
在一种可能的实现方式中，所述接收单元用于接收来自所述第二PLMN的去注册请求消息，所述去注册请求消息包括所述指示信息。
在一种可能的实现方式中，所述去注册请求消息还包括不允许所述通信装置接入所述第二PLMN的区域信息。
在一种可能的实现方式中，所述接收单元还用于在所述通信装置接入所述第二PLMN之前，接收来自所述第二PLMN的用于指示所述第二PLMN与所述第一PLMN之间的动态漫游协议被激活的指示信息。
在一种可能的实现方式中，所述接收单元还用于在所述通信装置接入所述第二PLMN之前，获取所述第二PLMN的信息。
在一种可能的实现方式中，所述第二PLMN的信息还包括如下信息中的至少一种：允许所述通信装置接入所述第二PLMN的接入技术类型、允许所述通信装置接入所述第二PLMN的区域信息、所述第二PLMN的优先级信息。
在一种可能的实现方式中，所述第二PLMN与所述第一PLMN具有相同的移动国家码，所述第二PLMN的移动网络码与所述第一PLMN的移动网络码不同。
在一种可能的实现方式中，所述第二PLMN与所述第一PLMN之间的动态漫游协议， 包括：若所述通信装置能够接入所述第一PLMN，所述第二PLMN与所述第一PLMN之间的漫游协议去激活；若所述通信装置无法接入所述第一PLMN，所述第二PLMN与所述第一PLMN之间的漫游协议激活。
在一种可能的实现方式中，所述第一PLMN为归属公用陆地移动网HPLMN，第二PLMN为拜访公用陆地移动网VPLMN。
在本申请的实施例中，接收单元702用于执行图3-图6实施例中终端设备的信号接收操作。发送单元703用于执行图3-图6实施例中终端设备的信号发送操作。处理单元701用于执行图3-图6实施例中终端设备的信号处理操作。具体参见图3-图6实施例中的描述。
在一种可能的实现方式中，处理单元71根据存储单元704中存储的计算机指令，使得该通信装置执行图3-图6实施例中终端设备的操作。
在另一种可能的实现方式中，该通信装置还可以是接入管理网元。该通信装置可以包括：接收单元，用于当终端设备无法接入第一PLMN时，获取第一指示信息，所述第一指示信息用于指示激活第二PLMN与所述第一PLMN之间的动态漫游协议，所述通信装置为所述第二PLMN中的装置；发送单元，用于向所述终端设备发送所述第一指示信息。
在一种可能的实现方式中，所述接收单元用于获取第一通知消息，所述第一通知消息包括所述第一指示信息。
在一种可能的实现方式中，所述第一通知消息还包括所述第一PLMN的信息，所述第一PLMN的信息包括所述第一PLMN的标识信息。
在一种可能的实现方式中，所述第一通知消息还包括如下信息中的至少一种：允许所述终端设备接入所述第二PLMN的接入技术类型、允许所述终端设备接入所述第二PLMN的区域信息、所述第二PLMN的优先级信息。
在一种可能的实现方式中，所述通信装置还包括处理单元，用于根据所述允许所述终端设备接入所述第二PLMN的区域信息确定所述接入网设备，其中，所述接入网设备位于所述允许所述终端设备接入所述第二PLMN的区域内。
在一种可能的实现方式中，所述接收单元用于通过所述第二PLMN中的网络开放功能网元从网管网元获取所述第一通知消息。
在一种可能的实现方式中，所述接收单元还用于获取第二指示信息，所述在第二指示信息用于指示去激活所述第二PLMN与所述第一PLMN之间的动态漫游协议；所述发送单元还用于通过所述接入网设备向所述终端设备发送所述第二指示信息。
该通信装置还可以是图4～图6中的接入管理网元，例如AM1，或者AMF2。对应的，接收单元702用于执行图4～图6实施例中AMF网元的信号接收操作。发送单元703用于执行图4～图6实施例中AMF网元的信号发送操作。处理单元701用于执行图4～图6实施例中AMF网元的信号处理操作。具体参见图4～图6实施例中的描述。
在一种可能的实现方式中，处理单元701根据存储单元704中存储的计算机指令，使得该通信装置执行执行图4～图6实施例中AMF网元的操作。
图8是本申请实施例中的另一种通信装置的示意图。具体的，该通信装置包括至少一个处理器801，收发器802、存储器803。至少一个处理器801，收发器802、存储器803通过通信线路804连接。
处理器801可以是一个CPU，微处理器，ASIC，或一个或多个用于控制本申请方 案程序执行的集成电路。
其中，存储器803用于存储执行本申请方案的计算机执行指令，并由处理器801来控制执行。处理器801用于执行存储器803中存储的计算机执行指令，从而实现本申请上述图3-图6实施例中终端设备或者AMF网元的操作。
本申请实施例中的计算机执行指令也可以称之为应用程序代码，本申请实施例对此不作具体限定。
在具体实现中，作为一种实施例，处理器801可以包括一个或多个CPU，例如图7中的CPU0和CPU1。
在具体实现中，作为一种实施例，处理器801可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。
图9是本申请实施例提供的芯片或者芯片系统的结构示意图。芯片包括一个或两个以上(包括两个)处理器901和通信接口902。
该芯片或者芯片系统还可以包括存储器903，存储器903可以包括只读存储器和随机存取存储器，并向处理器901提供操作指令和数据。
在一些实施方式中，存储器903存储了如下的元素，执行模块或者数据结构，或者他们的子集，或者他们的扩展集。
在本申请实施例中，通过调用存储器903存储的操作指令(该操作指令可存储在操作系统中)，控制上述图3-图6实施例中终端设备或者AMF网元的执行相应的操作。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机程序或指令。在计算机上加载和执行所述计算机程序或指令时，全部或部分地执行本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、网络设备、用户设备或者其它可编程装置。所述计算机程序或指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机程序或指令可以从一个网站站点、计算机、服务器或数据中心通过有线或无线方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是集成一个或多个可用介质的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，例如，软盘、硬盘、磁带；也可以是光介质，例如，数字视频光盘(digital video disc，DVD)；还可以是半导体介质，例如，固态硬盘(solid state drive，SSD)。
尽管在此结合各实施例对本申请进行了描述，然而，在实施所要求保护的本申请过程中，本领域技术人员通过查看附图、公开内容、以及所附权利要求书，可理解并实现公开实施例的其他变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。单个处理器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。
。

Claims (26)

  1. 一种漫游方法，其特征在于，包括：
    当终端设备无法接入第一PLMN时，所述终端设备接入第二PLMN，所述第二PLMN与所述第一PLMN之间的动态漫游协议被激活；
    所述终端设备接收来自所述第二PLMN的指示信息，所述指示信息用于指示所述第二PLMN与所述第一PLMN之间动态漫游协议去激活；
    所述终端设备根据所述指示信息向所述第一PLMN发送接入请求消息。
  2. 根据权利要求1所述的方法，其特征在于，所述终端设备接收来自所述第二PLMN的指示信息，包括：
    所述终端设备接收来自所述第二PLMN的广播消息，所述广播消息包括所述指示信息。
  3. 根据权利要求2所述的方法，其特征在于，所述广播消息还包括所述第一PLMN的标识信息，和/或，不允许所述终端设备接入所述第二PLMN的区域信息。
  4. 根据权利要求2或3所述的方法，其特征在于，所述方法还包括：
    所述终端设备在所述第二PLMN中去注册。
  5. 根据权利要求1所述的方法，其特征在于，所述终端设备接收来自所述第二PLMN的指示信息，包括：
    所述终端设备接收来自所述第二PLMN的去注册请求消息，所述去注册请求消息包括所述指示信息。
  6. 根据权利要求5所述的方法，其特征在于，所述去注册请求消息还包括不允许所述终端设备接入所述第二PLMN的区域信息。
  7. 根据权利要求1-6中任意一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备接入所述第二PLMN之前，所述终端设备接收来自所述第二PLMN的用于指示所述第二PLMN与所述第一PLMN之间的动态漫游协议被激活的指示信息。
  8. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    所述终端设备接入所述第二PLMN之前，所述终端设备获取所述第二PLMN的信息。
  9. 根据权利要求8所述的方法，其特征在于，所述第二PLMN的信息还包括如下信息中的至少一种：允许所述终端设备接入所述第二PLMN的接入技术类型、允许所述终端设备接入所述第二PLMN的区域信息、所述第二PLMN的优先级信息。
  10. 根据权利要求1-9中任意一项所述的方法，其特征在于，所述第二PLMN与所述第一PLMN具有相同的移动国家码，所述第二PLMN的移动网络码与所述第一PLMN的移动网络码不同。
  11. 根据权利要求1-10中任意一项所述的方法，其特征在于，所述第二PLMN与所述第一PLMN之间的动态漫游协议，包括：若所述终端设备能够接入所述第一PLMN，所述第二PLMN与所述第一PLMN之间的漫游协议去激活；若所述终端设备无法接入所述第一PLMN，所述第二PLMN与所述第一PLMN之间的漫游协议激活。
  12. 根据权利要求1-11中任意一项所述的方法，其特征在于，所述第一PLMN为归属公用陆地移动网HPLMN，第二PLMN为拜访公用陆地移动网VPLMN。
  13. 一种通信装置，其特征在于，包括：
    处理单元，用于当所述通信装置无法接入第一PLMN时，将所述通信装置接入第二PLMN，所述第二PLMN与所述第一PLMN之间的动态漫游协议被激活；
    接收单元，用于接收来自所述第二PLMN的指示信息，所述指示信息用于指示所述第二PLMN与所述第一PLMN之间动态漫游协议去激活；
    发送单元，用于根据所述指示信息向所述第一PLMN发送接入请求消息。
  14. 根据权利要求13所述的装置，其特征在于，所述接收单元用于接收来自所述第二PLMN的广播消息，所述广播消息包括所述指示信息。
  15. 根据权利要求14所述的装置，其特征在于，所述广播消息还包括所述第一PLMN的标识信息，和/或，不允许所述通信装置接入所述第二PLMN的区域信息。
  16. 根据权利要求14或15所述的装置，其特征在于，所述处理单元还用于将所述通信装置在所述第二PLMN中去注册。
  17. 根据权利要求13所述的装置，其特征在于，所述接收单元用于接收来自所述第二PLMN的去注册请求消息，所述去注册请求消息包括所述指示信息。
  18. 根据权利要求17所述的装置，其特征在于，所述去注册请求消息还包括不允许所述通信装置接入所述第二PLMN的区域信息。
  19. 根据权利要求13-18中任意一项所述的装置，其特征在于，所述接收单元还用于在所述通信装置接入所述第二PLMN之前，接收来自所述第二PLMN的用于指示所述第二PLMN与所述第一PLMN之间的动态漫游协议被激活的指示信息。
  20. 根据权利要求19所述的装置，其特征在于，所述接收单元还用于在所述通信装置接入所述第二PLMN之前，获取所述第二PLMN的信息。
  21. 根据权利要求20所述的装置，其特征在于，所述第二PLMN的信息还包括如下信息中的至少一种：允许所述通信装置接入所述第二PLMN的接入技术类型、允许所述通信装置接入所述第二PLMN的区域信息、所述第二PLMN的优先级信息。
  22. 根据权利要求13-21中任意一项所述的装置，其特征在于，所述第二PLMN与所述第一PLMN具有相同的移动国家码，所述第二PLMN的移动网络码与所述第一PLMN的移动网络码不同。
  23. 根据权利要求13-22中任意一项所述的装置，其特征在于，所述第二PLMN与所述第一PLMN之间的动态漫游协议，包括：若所述通信装置能够接入所述第一PLMN，所述第二PLMN与所述第一PLMN之间的漫游协议去激活；若所述通信装置无法接入所述第一PLMN，所述第二PLMN与所述第一PLMN之间的漫游协议激活。
  24. 根据权利要求13-23中任意一项所述的装置，其特征在于，所述第一PLMN为归属公用陆地移动网HPLMN，第二PLMN为拜访公用陆地移动网VPLMN。
  25. 一种计算机可读存储介质，其特征在于，所述可读存储介质中存储有计算机可读指令，当所述指令被执行时，实现如权利要求1～12任一项所述的方法。
  26. 一种通信装置，其特征在于，包括：处理器，其中，所述处理器用于运行存储器中存储的指令以执行如权利要求1～12任一项所述的方法。
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