Network access method, device and system, medium, equipment and product

Abstract

The invention discloses a network access method, device and system, a medium, equipment and a product, relates to the technical field of communication, and is used for performing network registration by using other access network equipment when the access network equipment of a terminal equipment operation main body fails. The method is applied to a first access network device, and comprises the following steps: when a second access network device fails, broadcasting a target public land mobile network identifier PLMN ID, so that a terminal device of an operation main body of the second access network device accesses a network according to the target PLMN ID; the first access network equipment and the second access network equipment are access network equipment of different operation subjects; the target PLMN ID is a pre-configured PLMN ID outside a PLMN list forbidden to be accessed by the terminal equipment.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a network access method, apparatus, system, medium, device and product. Background Technology

[0002] To minimize network outages for terminal devices when their operator's access network equipment fails, core network equipment can pre-send a disaster roaming instruction message to the terminal device. This message instructs the terminal device to use disaster roaming services during access network equipment failures, providing the Public Land Mobile Network Identity document (PLMN ID) of other available access network devices, and blocking access to prohibited PLMNs when using disaster roaming services. This allows the terminal device to register on other operators' networks based on the PLMN ID in the instruction message, even in the event of an operator's access network failure.

[0003] However, some terminal devices cannot recognize the aforementioned instruction messages sent by the core network equipment, which will prevent these terminal devices from registering with the network using other access network equipment when the access network equipment of their operating entity fails. Summary of the Invention

[0004] This application provides a network access method, apparatus, system, medium, device, and product for using other access network devices to register on the network when the access network equipment of the terminal equipment operator fails.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] In a first aspect, a network access method is provided, applied to a first access network device. The method includes: in the event of a failure of a second access network device, broadcasting a target Public Land Mobile Network ID (PLMN ID) so that a terminal device of the operator of the second access network device can access the network according to the target PLMN ID; the first access network device and the second access network device are access network devices of different operators; the target PLMN ID is a pre-configured PLMN ID that is not in the list of PLMNs that the terminal device is prohibited from accessing.

[0007] Optionally, after broadcasting the target Public Land Mobile Network ID (PLMN ID), the method further includes: receiving a first registration request message sent by the terminal device based on the target PLMN ID; and sending the first registration request message to the core network equipment of the first access network equipment operator, so that the core network equipment of the first access network equipment operator registers the terminal device with the network.

[0008] Optionally, the method further includes: stopping the broadcast of the target PLMNID if the second access network device is not faulty.

[0009] Based on the technical solution provided in this application, by broadcasting the target PLMN ID, a terminal device that has failed in the second access network device can access the network using the first access network device based on the target PLMN ID. Since the target PLMN ID is outside the terminal device's list of prohibited PLMNs and is a pre-configured PLMN ID, the terminal device has the authority to select the target PLMN ID, thereby accessing the network using the first access network device. In this way, the terminal device only needs to select the target PLMN ID, without needing to identify fault roaming-related indication messages on the terminal device side. This avoids the terminal device being unable to access the network using the first access network device due to its inability to recognize the indication messages from the second access network device.

[0010] Secondly, a network access method is provided, applied to a terminal device of a second access network device operator. The method includes: in the event of a failure of the second access network device, receiving a target PLMN ID broadcast by a first access network device; the first and second access network devices are access network devices of different operators; the target PLMN ID is a pre-configured PLMN ID that is not on the PLMN list prohibited from access by the terminal device; based on the target PLMN ID, sending a first registration request message through the first access network device to the core network device of the first access network device operator, so that the core network device of the first access network device operator registers the terminal device on the network.

[0011] Optionally, before the second access network device fails, the method further includes: sending a second registration request message to the core network equipment of the operator of the second access network device; receiving a response message to the second registration request message sent by the core network equipment of the operator of the second access network device; the response message to the second registration request message includes the target PLMN ID.

[0012] Based on the technical solution provided in this application, the terminal device receives the target PLMN ID broadcast by the first access network device and accesses the network using the target PLMN ID. Since the target PLMN ID is outside the prohibited PLMN list of the terminal device and is a pre-configured PLMN ID, the terminal device has the authority to select the target PLMN ID and then registers with the core network equipment of the first access network device operator. In this way, the terminal device only needs to select the target PLMN ID, without needing to identify fault roaming related indication messages on the terminal device side. This avoids the terminal device being unable to recognize the indication messages from the second access network device, thus preventing it from failing to register with the core network equipment of the first access network device operator.

[0013] Thirdly, a network access method is provided, applied to the core network equipment of a first access network equipment operator; the method includes: in the event of a second access network equipment failure, receiving a first registration request message sent by a terminal device of the second access network equipment operator through a target PLMN ID broadcast by the first access network equipment; the first access network equipment and the second access network equipment are access network equipment of different operators; the target PLMN ID is a pre-configured PLMN ID that is not in the PLMN list prohibited from access by the terminal device; and registering the terminal device with the network based on the first registration request message.

[0014] Optionally, registering the terminal device on the network based on the first registration request message includes: sending a first request message to the core network equipment of the second access network equipment operator; the first request message is used to request the terminal device's subscription information; receiving the subscription information sent by the core network equipment of the second access network equipment operator, and registering the terminal device on the network if the subscription information includes fault service authorization information; the fault service authorization information is used to indicate that the terminal device has the right to access the network of the first access network equipment operator when the second access network equipment fails.

[0015] Based on the technical solution provided in this application, a first registration request message can be used to register the terminal device of the second access network equipment operator with the network, enabling the terminal device to access the network. Since the target PLMN ID in the first registration request message is a pre-configured PLMN ID outside the list of PLMNs prohibited from access by the terminal device, the terminal device has the authority to select the target PLMN ID, and thus registers with the core network equipment of the first access network equipment operator. In this way, the terminal device only needs to select the target PLMN ID, without needing to identify fault roaming related indication messages on the terminal device side. This avoids the terminal device being unable to recognize the indication messages of the second access network equipment, thus preventing it from failing to register with the core network equipment of the first access network equipment operator.

[0016] Fourthly, a network access method is provided, applied to the core network equipment of a second access network equipment operator. The method includes: receiving a second registration request message sent by a terminal equipment of the second access network equipment operator; sending a response message including a target PLMN ID to the terminal equipment, so that the terminal equipment can access the network based on the target PLMN ID broadcast by the first access network equipment in the event of a failure of the second access network equipment; the first access network equipment and the second access network equipment are access network equipment of different operators; the target PLMN ID is a pre-configured PLMN ID that is not in the PLMN list that the terminal equipment is prohibited from accessing.

[0017] Optionally, when there are multiple terminal devices and multiple first access network device operators, there are multiple target PLMN IDs, and the first access network devices of different operators broadcast different target PLMN IDs; sending response messages including the target PLMN ID to terminal devices includes: sending different response messages to different terminal devices; the different response messages include different target PLMN IDs.

[0018] Based on the technical solution provided in this application, when registering a terminal device through the core network equipment of the second access network equipment operator, a target PLMN ID is pre-configured for the terminal device. Since the target PLMN ID is outside the list of PLMNs that the terminal device is prohibited from accessing, the terminal device has the authority to select a target PLMN ID. In the event of a failure in the second access network equipment, the terminal device can access the network based on the target PLMN ID broadcast by the first access network equipment. Thus, the terminal device only needs to select the target PLMN ID, without needing to identify fault roaming-related indication messages on the terminal device side. This avoids the terminal device being unable to access the network using the first access network equipment due to its inability to recognize the indication messages from the second access network equipment.

[0019] Fifthly, a network access device is provided, applied to a first access network device, the device comprising: a processing unit; the processing unit being configured to, in the event of a failure of a second access network device, broadcast a target Public Land Mobile Network Identifier (PLMNID) so that a terminal device of the operator of the second access network device can access the network according to the target PLMN ID; the first access network device and the second access network device are access network devices of different operators; the target PLMN ID is a pre-configured PLMN ID that is not in the list of PLMNs prohibited from access by the terminal device.

[0020] Optionally, the device further includes: a receiving unit and a sending unit; after broadcasting the target Public Land Mobile Network ID (PLMN ID), the receiving unit is configured to receive a first registration request message sent by the terminal device based on the target PLMN ID; the sending unit is configured to send the first registration request message to the core network equipment of the first access network equipment operator, so that the core network equipment of the first access network equipment operator can register the terminal device on the network.

[0021] Optionally, the processing unit is also configured to stop broadcasting the target PLMNID if the second access network device is not faulty.

[0022] Sixthly, a network access device is provided, applied to a terminal device of a second access network device operator; the device includes: a receiving unit and a sending unit; the receiving unit is configured to receive a target PLMN ID broadcast by a first access network device in the event of a failure of the second access network device; the first access network device and the second access network device are access network devices of different operators; the target PLMN ID is a pre-configured PLMN ID that is not in the PLMN list that the terminal device is prohibited from accessing; the sending unit is configured to send a first registration request message to the core network device of the first access network device operator through the first access network device based on the target PLMN ID, so that the core network device of the first access network device operator registers the terminal device on the network.

[0023] Optionally, before the second access network device fails, the sending unit is further configured to send a second registration request message to the core network device of the second access network device operator; the receiving unit is further configured to receive a response message to the second registration request message sent by the core network device of the second access network device operator; the response message to the second registration request message includes the target PLMN ID.

[0024] In a seventh aspect, a network access device is provided, applied to the core network equipment of a first access network equipment operator. The device includes: a receiving unit and a processing unit; the receiving unit is configured to, in the event of a failure of the second access network equipment, receive a first registration request message sent by a terminal device of the second access network equipment operator through a target PLMN ID broadcast by the first access network equipment; the first access network equipment and the second access network equipment are access network equipment of different operators; the target PLMN ID is a pre-configured PLMN ID that is outside the PLMN list prohibited from access by the terminal device; the processing unit is configured to perform network registration for the terminal device based on the first registration request message.

[0025] Optionally, the processing unit is specifically configured to: send a first request message to the core network equipment of the second access network equipment operator; the first request message is used to request the subscription information of the terminal equipment; receive the subscription information sent by the core network equipment of the second access network equipment operator, and, if the subscription information includes fault service authorization information, register the terminal equipment on the network; the fault service authorization information is used to indicate that the terminal equipment has the right to access the network of the first access network equipment operator when the second access network equipment fails; and register the terminal equipment on the network.

[0026] Eighthly, a network access device is provided, applied to the core network equipment of a second access network equipment operator. The device includes: a receiving unit and a sending unit; the receiving unit is used to receive a second registration request message sent by a terminal device of the second access network equipment operator; the sending unit is used to send a response message including a target PLMN ID to the terminal device, so that the terminal device can access the network based on the target PLMN ID broadcast by the first access network equipment in the event of a failure of the second access network equipment; the first access network equipment and the second access network equipment are access network equipment of different operators; the target PLMN ID is a pre-configured PLMN ID that is not in the PLMN list that the terminal device is prohibited from accessing.

[0027] Optionally, when there are multiple terminal devices and multiple first access network equipment operators, there are multiple target PLMN IDs. The sending unit is specifically used to: send different response messages to different terminal devices; broadcast different target PLMN IDs by the first access network equipment of different operators; and include different target PLMN IDs in different response messages.

[0028] Ninthly, a network access device is provided, which can realize the functions performed by the network access device in the above aspects or possible designs. The functions can be implemented by hardware. For example, in one possible design, the network access device may include a processor and a communication interface. The processor can be used to support the network access device in realizing the functions involved in the first aspect or any possible design of the first aspect.

[0029] In another possible design, the network access device may further include a memory for storing necessary computer execution instructions and data. When the network access device is running, the processor executes the computer execution instructions stored in the memory to cause the network access device to perform the first aspect or any of the possible network access methods described above.

[0030] In a tenth aspect, a computer-readable storage medium is provided, which may be a readable non-volatile storage medium storing computer instructions or programs that, when executed on a computer, enable the computer to perform the network access method described in the first aspect or any of the possible network access methods described above.

[0031] In the eleventh aspect, a computer program product containing instructions is provided, which, when run on a computer, enables the computer to execute the network access method of the first aspect or any possible design of the above aspects.

[0032] In a twelfth aspect, an electronic device is provided, comprising one or more processors and one or more memories. The one or more memories are coupled to the one or more processors, and the one or more memories are used to store computer program code, including computer instructions, which, when executed by the one or more processors, cause the electronic device to perform a network access method as described in the first aspect or any possible design of the first aspect.

[0033] In a thirteenth aspect, a chip system is provided, comprising a processor and a communication interface, which can be used to implement the functions performed by the network access device in the first aspect or any possible design of the first aspect. In one possible design, the chip system further includes a memory for storing program instructions and / or data. The chip system may be composed of chips or may include chips and other discrete devices, without limitation. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of an indirect network sharing system provided in an embodiment of this application;

[0035] Figure 2 This is a schematic diagram of the structure of a network access system provided in an embodiment of this application;

[0036] Figure 3 This is a schematic diagram of the structure of another network access system provided in an embodiment of this application;

[0037] Figure 4 This is a schematic diagram of the structure of another network access system provided in an embodiment of this application;

[0038] Figure 5 This is a schematic diagram of the structure of a network access device provided in an embodiment of this application;

[0039] Figure 6 A flowchart illustrating a network access method provided in an embodiment of this application;

[0040] Figure 7 A flowchart illustrating yet another network access method provided in an embodiment of this application;

[0041] Figure 8 A flowchart illustrating yet another network access method provided in an embodiment of this application;

[0042] Figure 9 A flowchart illustrating yet another network access method provided in an embodiment of this application;

[0043] Figure 10 A flowchart illustrating yet another network access method provided in an embodiment of this application;

[0044] Figure 11 This is a schematic diagram of the structure of another network access device provided in the embodiments of this application;

[0045] Figure 12 This is a schematic diagram of the structure of another network access device provided in the embodiments of this application;

[0046] Figure 13 This is a schematic diagram of the structure of another network access device provided in the embodiments of this application;

[0047] Figure 14 This is a schematic diagram of another network access device provided in an embodiment of this application. Detailed Implementation

[0048] To enable those skilled in the art to better understand the technical solutions of this disclosure, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0049] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this application as detailed in the appended claims.

[0050] It should also be understood that the term "comprising" indicates the presence of the described feature, whole, step, operation, element and / or component, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements and / or components.

[0051] When a disaster occurs in a geographical area, causing the access network equipment (such as base stations) of the primary operator in that area to malfunction and become unable to work normally, indirect network sharing technology can be used to connect the users of the primary operator in that geographical area to the core network of the operator through the network of the shared operator. This allows the users of the primary operator to enjoy network services (such as 5G network services) normally until the access network equipment of the primary operator in that area is restored.

[0052] Figure 1 A schematic diagram of an indirect network sharing system is shown. Figure 1As shown, OP1 UE is the terminal equipment of operator OP1. Operator OP1 is a participating operator. Operator OP2 is the contractor operator providing indirect network sharing. OP2 access network equipment will broadcast a specific PLMN ID or OP1 PLMN ID in the shared area. When OP1 UE cannot find the network signal of operator OP1 but the network signal of operator OP2 is present, it can use indirect network sharing technology to access the shared network of operator OP2 by selecting the specific PLMN ID or OP1 PLMN ID broadcast by OP2 access network equipment. At this time, the OP1 core network equipment of operator OP1 controls and provides services to the UE through the OP2 core network equipment of operator OP2 and the shared next-generation radio access network (NG Radio Access Network, NG-RAN).

[0053] It should be noted that in the context of indirect network sharing, the sharing party's operating entity is also called the participating party's operating entity, and the shared party's operating entity is also called the contractor's operating entity.

[0054] The "Disaster Roaming with Minimized Service Disruption" technical solution defined by the 3rd Generation Partnership Project (3GPP) in the 5G Core (5GC) requires user equipment (UE) to cooperate with the network to achieve disaster roaming.

[0055] For example, before a disaster occurs, the core network equipment of the terminal equipment operator can send a disaster roaming indication message (also known as a disaster roaming enable indication) to the terminal equipment in advance. The disaster roaming indication message is used to indicate that the terminal equipment can use the disaster roaming service when the access network equipment fails, as well as the selectable PLMN ID.

[0056] In the event of a UE's access network equipment failure within a preset area, based on the fault roaming protocol between operators, other unfailed access network equipment within that preset area can broadcast a disaster roaming service accessibility indication and a fault-accessible PLMN indication (also known as a disaster-affected PLMN indication) to the UE. Upon receiving this indication, the UE determines that its own access network equipment has failed. Combining the "disaster roaming enable indication" and the "PLMN list accessible under disaster conditions," the UE will ignore the stored list of forbidden public land mobile networks (FPLMNs) when selecting a PLMN and will select a PLMN based on the "PLMN list accessible under disaster conditions." Subsequently, the UE will access other unfailed access network equipment via disaster roaming.

[0057] Figure 2 A schematic diagram of a network access system is shown, such as... Figure 2 As shown, in the first phase, the OP1 core network equipment of the first operating entity (OP1) will send a disaster roaming indication message to the OP1 UE. The disaster roaming indication message is used to indicate that the OP1 UE can use the disaster roaming service and select a PLMN ID when the access network equipment fails.

[0058] In the second phase, if the OP1 access network equipment of the first operator OP1 malfunctions and cannot function properly, the OP1 UE cannot connect to the network through the OP1 access network equipment. At this time, based on the disaster roaming protocol between OP1 and operator OP2, after OP2 learns that the OP1 access network equipment is not functioning properly in this area, the OP2 access network equipment can broadcast a "Disaster Roaming Service Accessible Indication" (also known as a Disaster Roaming Service Accessible Indication) and a "Fault Accessible PLMN Indication" in this area. When the OP1 UE receives the "Disaster Roaming Service Accessible Indication" and the "Fault Accessible PLMN Indication", it will ignore its own stored FPLMN list. It will select a PLMN according to the PLMN list in the "Fault Accessible PLMN Indication". Since the PLMN list will contain the OP2 PLMN ID, the OP1 UE will select the OP2 PLMN ID and then register with the OP2 network.

[0059] It should be noted that under normal circumstances (i.e., when the OP1 access network equipment is not faulty), if both OP1 and OP2 networks provide coverage in the same area, the OP1 UE's FPLMNs list will store the OP2 PLMN ID. Therefore, the OP1 UE will not access the OP2 network (it cannot select the OP2 PLMN ID). Conversely, the OP2 UE's FPLMNs list will store the OP1 PLMN ID. Thus, the OP2 UE will not access the OP1 network (it cannot select the OP1 PLMN ID). Therefore, under normal circumstances, the OP1 UE can only select the OP1 PLMN ID when choosing a PLMN.

[0060] However, some terminal devices cannot recognize the instruction messages sent by the access network devices, which can lead to the inability to register with the network using other access network devices when the access network devices of the operators of these terminal devices malfunction.

[0061] In view of this, embodiments of this application provide a network access method, including: in the event of a failure of a second access network device, broadcasting a target Public Land Mobile Network ID (PLMN ID) so that a terminal device of the operator of the second access network device can access the network according to the target PLMN ID; the first access network device and the second access network device are access network devices of different operators; the target PLMN ID is a pre-configured PLMN ID that is not in the list of PLMNs that the terminal device is prohibited from accessing.

[0062] The methods provided in the embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0063] It should be noted that the network system described in the embodiments of this application is for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and does not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of network systems and the emergence of other network systems, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0064] Figure 3 The diagram shown is a structural schematic of a network access system 10 provided in an embodiment of this application. Figure 3 As shown, the network access system 10 may include terminal equipment 11, access network equipment 12, and core network equipment 13.

[0065] In this application, the terminal device 11 is used to access other non-faulty access network devices in the event of an access network device failure. For example, the terminal device 11 may include a terminal device of a second access network device operator (also referred to as OP1 UE) and a terminal device of a first access network device operator (also referred to as OP2 UE). The access network device of OP1 UE is the second access network device (also referred to as OP1 access network device), and the access network device of OP2 UE is the first access network device (also referred to as OP2 access network device).

[0066] A terminal device, also known as a terminal, mobile station (MS), or mobile terminal (MT), is a device that provides voice and / or data connectivity to a user. For example, terminal device 11 can be a handheld device or an in-vehicle device with wireless connectivity. Specifically, it can be a smartphone, pocket personal computer (PPC), handheld computer, personal digital assistant (PDA), laptop computer, tablet computer, wearable device, or in-vehicle device. The embodiments of this application do not limit the specific technology, quantity, or form of the terminal device 11.

[0067] In the embodiments of this application, the access network device 12 is used to provide network services to the OP1 UE. For example, it may include the OP1 access network device and the OP2 access network device.

[0068] The OP1 access network device involved in the embodiments of this application is used to provide network services to the OP1 UE, and to provide network services to the OP2 UE in the event of a failure of the OP2 access network device. The OP2 access network device is used to provide network services to the OP2 UE, and to provide network services to the OP1 UE in the event of a failure of the OP1 access network device. For example, the access network device can be a base station.

[0069] For example, in the event of a failure in the OP2 access network device, the OP1 access network device can broadcast the target PLMN ID, and the OP2 UE can send a registration request message to the OP1 access network device using the target PLMN ID.

[0070] In the embodiments of this application, the core network device 13 is used to send a broadcast command to the first access network device in the event of a failure of the second access network device, so that the first access network device broadcasts the target PLMN ID. For example, the core network device 13 may include the core network device of the second access network device operator (also referred to as the OP1 core network device) and the core network device of the first access network device operator (also referred to as the OP2 core network device). In the event of a failure of the OP2 access network device, the OP1 core network device sends a broadcast command to the OP1 access network device, so that the OP1 access network device broadcasts the target PLMN ID. Alternatively, in the event of a failure of the OP1 access network device, the OP2 core network device sends a broadcast command to the OP2 access network device, so that the OP2 access network device broadcasts the target PLMN ID.

[0071] Figure 4 This diagram illustrates the structure of another network access system 10 provided in an embodiment of this application. Figure 4 As shown, there are multiple operators for the first access network equipment. For example, the first access network equipment in the network access system 10 also includes OP3 access network equipment. The core network equipment 13 also includes OP3 core network equipment.

[0072] Among them, OP1 access network equipment, OP2 access network equipment, and OP3 access network equipment belong to different operating entities.

[0073] The OP3 access network device is used to provide network services to the OP3 UE, and to provide network services to both the OP3 UE and the OP1 UE in the event of a failure of the OP1 UE's access network device 12.

[0074] Figure 3 and Figure 4 This is just an example framework diagram. Figure 3 and Figure 4 The names of the various devices included are unrestricted, and except for Figure 3 and Figure 4 In addition to the functional nodes shown, other nodes may also be included, but this application embodiment does not limit this.

[0075] In practical implementation, Figure 3 and Figure 4 Each device in the process can be adopted Figure 5 The shown composition structure, or including Figure 5 The components shown. Figure 5 This is a schematic diagram of the structure of a network access device 200 provided in an embodiment of this application. The network access device 200 can be an access network device, or it can be a chip or system-on-a-chip in the access network device. Figure 5As shown, the network access device 200 includes a processor 201, a communication interface 202, and a communication line 203.

[0076] Furthermore, the network access device 200 may also include a memory 204. The processor 201, memory 204, and communication interface 202 can be connected via a communication line 203.

[0077] The processor 201 can be a CPU, a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 201 can also be other devices with processing capabilities, such as circuits, devices, or software modules, without limitation.

[0078] Communication interface 202 is used to communicate with other devices or other communication networks. Communication interface 202 can be a module, circuit, communication interface, or any device capable of enabling communication.

[0079] Communication line 203 is used to transmit information between the components included in network access device 200.

[0080] Memory 204 is used to store instructions. These instructions can be computer programs.

[0081] The memory 204 can be a read-only memory (ROM) or other type of static storage device that can store static information and / or instructions; it can also be a random access memory (RAM) or other type of dynamic storage device that can store information and / or instructions; it can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0082] It should be noted that the memory 204 can exist independently of the processor 201 or can be integrated with the processor 201. The memory 204 can be used to store instructions, program code, or some data, etc. The memory 204 can be located inside or outside the network access device 200, without limitation. The processor 201 is used to execute the instructions stored in the memory 204 to implement the network access method provided in the following embodiments of this application.

[0083] In one example, processor 201 may include one or more CPUs, for example, Figure 5 CPU0 and CPU1 in the CPU.

[0084] As an optional implementation, the network access device 200 includes multiple processors, for example, besides Figure 5 In addition to processor 201, it may also include processor 205.

[0085] It should be pointed out that, Figure 5 The composition shown does not constitute a basis for the interpretation of this invention. Figure 3 and Figure 4 The limitations of each device in the process, except Figure 5 In addition to the components shown, Figure 3 and Figure 4 The various devices in can include compared to Figure 5 More or fewer components, or combinations of certain components, or different arrangements of components.

[0086] In this embodiment of the application, the chip system may be composed of chips or may include chips and other discrete devices.

[0087] Furthermore, the actions, terms, etc., involved in the various embodiments of this application can be referenced interchangeably without limitation. The message names or parameter names in the messages exchanged between the various devices in the embodiments of this application are merely examples, and other names may be used in specific implementations without limitation.

[0088] It should be noted that, in this application, the terms "exemplary" or "for example" are used to indicate that something is being described as an example, illustration, or illustration. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0089] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, 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.

[0090] The following is combined Figure 3 and Figure 4 The network access system shown herein describes the network access method provided in the embodiments of this application.

[0091] Figure 6 This is a flowchart illustrating a network access method provided in an embodiment of this application, as shown below. Figure 6 As shown, the method includes the following S301:

[0092] S301. In the event of a failure of the second access network device, the first access network device broadcasts the target Public Land Mobile Network (PLMN) ID. Correspondingly, the terminal device receives the target PLMN ID.

[0093] In this system, the first access network device is a base station operating outside the second access network device. The target PLMN ID is a pre-configured PLMN ID that is not on the terminal device's list of prohibited PLMNs. For example, the pre-configured PLMN ID is the PLMN ID configured in the core network equipment of the operator of the second access network device.

[0094] For example, the target PLMN ID can be either the first PLMN ID or the second PLMN ID. The first PLMN ID is the PLMN ID of the second access network. The second PLMN ID is a shared dedicated PLMN ID between the second and first access networks (also known as a specific PLMN ID, dedicated network number, network number dedicated to indirect network sharing, network number dedicated to network disaster recovery, etc.).

[0095] The list of prohibited PLMNs includes at least one PLMN ID for which the terminal device has no access permission. For example, combined with Figure 3 When the terminal device is OP1 UE, the list of prohibited PLMNs can include OP2PLMN ID.

[0096] As one possible implementation, the first access network device can broadcast the target public land mobile network identifier (PLMN ID) via a broadcast channel if it determines that the second access network device is faulty.

[0097] In some examples, there is heartbeat monitoring between access network devices in different operators. If the first access network device does not receive a heartbeat message from the second access network device within a target time period, it can determine that the second access network device is faulty.

[0098] The target time period can be set as needed. For example, it can be 10 seconds, 20 seconds, etc.

[0099] In other examples, the first access network device determines that the second access network device is faulty upon receiving a broadcast indication message from the core network device of the first access network device's operating entity.

[0100] The broadcast indication message is used to instruct the first access network device to broadcast the target PLMN ID.

[0101] In one example, combining Figure 3 If the OP2 access network device determines that the OP1 access network device is faulty, it can broadcast the target PLMN ID.

[0102] In another example, combined Figure 4 The OP2 access network device can broadcast the target PLMN ID if it determines that the OP1 access network device has failed. The OP3 access network device can also broadcast the target PLMN ID if it determines that the OP1 access network device has failed.

[0103] The target PLMN ID broadcast by the OP2 access network device can be different from the target PLMN ID broadcast by the OP3 access network device. For example, the target PLMN ID broadcast by the OP2 access network device can be specific PLMN ID1, while the target PLMN ID broadcast by the OP3 access network device can be specific PLMN ID2.

[0104] Understandably, by connecting different terminal devices to access network equipment of different operators, the problem of a short-term surge in signaling volume caused by connecting to access network equipment of the same operator can be avoided, thereby improving the signal quality of access network equipment.

[0105] In some embodiments, the first access network device may broadcast the target public land mobile network identifier (PLMN ID) if it determines that the signal quality received by the terminal device from the second access network is less than a quality threshold.

[0106] The quality threshold can be set as needed. For example, it can be 10 dB / mW.

[0107] It should be noted that the first access network device broadcasts both the target PLMN ID and its own PLMN ID. For example, combined with... Figure 3 The OP2 access network device broadcasts both the target PLMN ID and the OP2 PLMN ID. For example, combining... Figure 4 The OP3 access network device broadcasts the target PLMN ID while also broadcasting the OP3 PLMN ID.

[0108] It should be noted that the operators of the first access network equipment have pre-signed a network disaster recovery agreement, which enables the first access network equipment to broadcast the target public land mobile network identifier (PLMN ID) in the event of a failure of the second access network equipment.

[0109] For example, a network disaster recovery protocol is used to instruct the first access network device to broadcast the target PLMN ID when the second access network device fails, so that the core network device of the first access network device operator can register the terminal device on the network.

[0110] In one possible embodiment, the first access network device can stop broadcasting the target PLMN ID if the second access network device is not faulty.

[0111] As one possible implementation, the core network equipment of the first access network equipment operator can stop broadcasting the target PLMN ID and send a registration message to the terminal equipment if the second access network equipment is not faulty.

[0112] The deregistration message instructs the terminal device to deregister from the external network. The deregistration process can refer to existing technologies and will not be described in detail here.

[0113] It should be noted that the first access network device can determine that the second access network device is not faulty after detecting the heartbeat message of the second access network device.

[0114] Figure 7 A flowchart illustrating another network access method provided in this application embodiment is shown below. Figure 7 As shown, the method includes the following S401-S403:

[0115] S401. The terminal device sends a first registration request message to the first access network device based on the target PLMN ID. Correspondingly, the first access network device receives the first registration request message sent by the terminal device based on the target PLMN ID.

[0116] The first registration request message includes the target PLMN ID.

[0117] As one possible implementation, the terminal device can receive the target PLMN ID from the broadcast message, and after selecting the target PLMN ID, trigger the sending of a first registration request message to the first access network device.

[0118] For example, combining Figure 3 After selecting the target PLMN ID, the terminal device can send a registration request message to the OP2 access network device.

[0119] For example, combining Figure 4 After the terminal device selects the target PLMN ID sent by the OP2 access network device, it can send a registration request message to the OP2 access network device. After the terminal device selects the target PLMN ID sent by the OP3 access network device, it can send a registration request message to the OP3 access network device.

[0120] S402. The first access network device sends a first registration request message to the core network equipment of the first access network device's operating entity. Correspondingly, the core network equipment of the first access network device's operating entity receives the first registration request message.

[0121] The first registration request message is used to instruct the core network equipment of the first access network equipment operator to register the terminal equipment on the network.

[0122] As one possible implementation, the first access network device can send a first registration request message to the Access and Mobility Management Function (AMF) network element in the core network equipment of the first access network device operator. Correspondingly, the AMF network element in the core network equipment of the first access network device operator receives the first registration request message.

[0123] In one example, the first access network device can send a first registration request message to the AMF network element in the core network device of the first access network device operator through a preset communication interface.

[0124] For example, the default communication interface can be the NG interface.

[0125] S403. The core network equipment of the first access network equipment operator performs network registration for the terminal equipment based on the first registration request message.

[0126] As one possible implementation, the core network equipment of the first access network equipment operator can obtain the terminal device's subscription information after receiving the first registration request message, and register the terminal device on the network based on the terminal device's subscription information.

[0127] In one example, after receiving the first registration request message from the terminal device, the core network device of the first access network device operator can obtain the terminal device's subscription information from the core network device of the second access network device operator, and perform network registration for the terminal device based on the terminal device's subscription information.

[0128] For example, combining Figure 3 The OP2 core network device can respond to the registration request message from the terminal device and register the OP1UE with the network.

[0129] For example, when the first access network device is an OP2 access network device, the OP2 core network device can perform network registration for the OP1 UE based on the terminal device's subscription information. When the first access network device is an OP3 access network device, the OP3 core network device can perform network registration for the OP1 UE based on the OP1 UE's subscription information.

[0130] It should be noted that the specific details of this step can be found in the following sections, and will not be repeated here.

[0131] In some embodiments, after receiving the registration request message from the terminal device, the first access network device can determine whether the terminal device is a faulty terminal device of the second access network device based on the user permanent identifier (SUbs cription Permanent Identifier, SUPI) in the first registration request message, and perform network registration for the terminal device if the terminal device is a faulty terminal device of the second access network device.

[0132] In one example, the first access network device can determine the Mobile Network Code (MNC) in the SUPI. If the MNC in the SUPI is the same as the MNC corresponding to the second access network device, the terminal device can be determined to be the terminal device that is faulty in the second access network device.

[0133] Based on the technical solution provided in this application, by broadcasting the target PLMN ID, a terminal device that has failed in the second access network device can access the network using the first access network device based on the target PLMN ID. Since the target PLMN ID is outside the terminal device's list of prohibited PLMNs and is a pre-configured PLMN ID, the terminal device has the authority to select the target PLMN ID, thereby accessing the network using the first access network device. In this way, the terminal device only needs to select the target PLMN ID, without needing to identify fault roaming-related indication messages on the terminal device side. This avoids the terminal device being unable to access the network using the first access network device due to its inability to recognize the indication messages from the second access network device.

[0134] In one possible embodiment, when the target PLMN ID is the second PLMN ID, in order to send a first registration request message to the first access network device, S401 of this application may include the following S501-S502.

[0135] S501, The terminal device determines whether the target PLMN ID meets the first preset condition.

[0136] The first preset condition is that the terminal device's equivalent public land mobile network (EPLMN, EPLMN) list includes the target PLMN ID, and the target PLMN ID is a PLMN ID that is not in the terminal device's list of prohibited PLMNs.

[0137] As one possible implementation, the terminal device is pre-configured with an EPLMN list and a list of prohibited PLMNs. The terminal device can determine that the target PLMN ID meets the first preset condition if the EPLMN list includes the target PLMN ID and the target PLMN ID is a PLMN ID that is not in the terminal device's list of prohibited PLMNs.

[0138] If the target PLMN ID is not included in the EPLMN list, or if the target PLMN ID is a PLMN ID in the terminal device's list of prohibited PLMNs, then the target PLMN ID is determined not to meet the first preset condition.

[0139] In some embodiments, when the target PLMN ID is the first PLMN ID, the terminal device can directly use the target PLMN ID to send a registration request message to the first access network device.

[0140] In one example, combining Figure 4The terminal device can receive the target PLMN ID of the OP2 access network device and the target PLMN ID of the OP3 access network device respectively. Further, the terminal device determines whether the target PLMN ID of the OP2 access network device and the target PLMN ID of the OP3 access network device meet the first preset condition respectively.

[0141] S502. When the first preset condition is met, the terminal device sends a first registration request message to the first access network device. Correspondingly, the first access network device receives the first registration request message.

[0142] As one possible implementation, when the number of first access network devices is a single device, the terminal device can send a first registration request message to the first access network device if the target PLMN ID meets the first preset condition.

[0143] As another possible implementation, when there are multiple first access network equipment operators, there are multiple target PLMN IDs. The terminal equipment can determine the target PLMN ID that meets the first preset condition from the multiple PLMN IDs, and send a first registration request message to the first access network equipment that broadcasts the target PLMN ID that meets the first preset condition.

[0144] In some embodiments, if the terminal device does not meet the first preset condition, it will no longer send the first registration request message to the first access network device.

[0145] For example, combining Figure 4 If the target PLMN ID broadcast by the OP2 access network device meets the first preset condition, the terminal device can send a first registration request message to the OP2 access network device. Similarly, if the target PLMN ID broadcast by the OP3 access network device meets the first preset condition, the terminal device can send a first registration request message to the OP3 access network device.

[0146] Understandably, by setting the first preset condition, it is possible to ensure that different terminal devices with malfunctions in the second access network device can access access network devices of different operators, thus avoiding a surge in signaling of the access network device caused by a large number of terminal devices accessing the same access network device.

[0147] One possible implementation, Figure 8 This is a flowchart illustrating another network access method provided in an embodiment of this application. Figure 8 As shown, S403 in this application may include the following S601-S603.

[0148] S601, the core network equipment of the first access network equipment operator sends a first request message to the core network equipment of the second access network equipment operator. Correspondingly, the core network equipment of the second access network equipment operator receives the first request message.

[0149] The first request message is used to request subscription information from the terminal device. For example, the first request message may include the terminal device's SUPI, roaming parameters, and disaster service indication. The disaster service indication is used to indicate a failure in the terminal device's second access network equipment.

[0150] As one possible implementation, the core network equipment of the first access network equipment operator can send a first request message to the Unified Data Management (UDM) network element in the core network equipment of the second access network equipment operator through the AMF network element.

[0151] For example, combining Figure 4 The OP2 core network device can send the first request message to the OP1 core network device. Alternatively, the OP3 core network device can send the first request message to the OP1 core network device.

[0152] S602, The core network equipment of the second access network equipment operator sends the contract information to the core network equipment of the first access network equipment operator; correspondingly, the core network equipment of the first access network equipment operator receives the contract information.

[0153] The contract information is sent by the core network equipment of the second access network equipment operator when the contract information includes fault service authorization information. The fault service authorization information indicates that the terminal equipment has the authority to access the network of the first access network equipment operator when the second access network equipment fails.

[0154] As one possible implementation, the UDM network element in the core network equipment of the second access network equipment operator stores the subscription information of the terminal equipment. The core network equipment of the second access network equipment operator can send the subscription information to the core network equipment of the first access network equipment operator through the UDM network element in the serving core network equipment.

[0155] For example, combining Figure 4 The OP2 core network device can send a first request message to the OP1 core network device. In response to the received first request message, the OP1 core network device can send subscription information to the OP2 core network device. Alternatively, the OP3 core network device can send a first request message to the OP1 core network device. In response to the received first request message, the OP1 core network device can send subscription information to the OP3 core network device.

[0156] In some embodiments, the UDM network element in the core network equipment of the second access network equipment operator can detect whether there is a fault service authorization instruction (also known as a disaster service authorization instruction) in the subscription information of the terminal equipment, and if there is a fault service authorization instruction in the subscription information, send the subscription information of the terminal equipment to the AMF network element in the core network equipment of the first access network equipment operator.

[0157] If there is no fault service authorization instruction in the contract information, the core network equipment of the second access network equipment operator refuses to send the terminal equipment's contract information to the core network equipment of the first access network equipment operator.

[0158] It should be noted that the fault service authorization indication is used to indicate that the terminal device has the authority to access the network of the first access network device operator when the second access network device fails.

[0159] S603. The core network equipment of the first access network equipment operator performs network registration for the terminal equipment.

[0160] As one possible implementation, the core network equipment of the first access network equipment operator can send a registration acceptance message to the terminal equipment after receiving the subscription information, so as to register the terminal equipment with the network.

[0161] In one example, the AMF network element in the core network equipment of the first access network equipment operator can send a registration acceptance message to the terminal equipment through the first access network equipment to complete the network registration of the terminal equipment.

[0162] In some embodiments, if the core network equipment of the first access network equipment operator does not receive the subscription information of the terminal equipment, it may send a registration rejection message to the terminal equipment.

[0163] The registration rejection message is used to instruct terminal devices to refuse network registration.

[0164] One possible implementation, Figure 9 This is a flowchart illustrating another network access method provided in an embodiment of this application. Figure 9 As shown, the network access method in this application may further include the following S701-S702.

[0165] S701, the terminal device sends a second registration request message to the core network equipment of the second access network equipment operator. Correspondingly, the second access network equipment receives the second registration request message.

[0166] The second registration request message may include the SUPI of the terminal device and the PLMNID broadcast by the second access network device.

[0167] As one possible implementation, the terminal device can trigger the sending of a second registration request message to the second access network device after receiving the PLMNID broadcast by the second access network device.

[0168] For example, combining Figure 3 The OP1 UE can send a registration request message to the AMF network element in the OP1 core network device through the OP1 access network device.

[0169] S702, the core network equipment of the second access network equipment operator sends a response message including the target PLMN ID to the terminal equipment. Correspondingly, the terminal equipment receives the response message including the target PLMN ID.

[0170] The target PLMN ID is located in the Equivalent Public Land Mobile Network (EPLMN) list in the response message.

[0171] As one possible implementation, if the number of first access network devices is a single entity, the core network device of the second access network device operator can directly send a response message including the first EPLMN list to the terminal device.

[0172] The first EPLMN list includes the target PLMN ID of the first access network device.

[0173] As another possible implementation, when there are multiple operators of the first access network equipment, the core network equipment of the second access network equipment operator can send a response message including a second EPLMN list to the terminal equipment.

[0174] The second EPLMN list includes multiple target PLMN IDs. Each target PLMN ID is a target PLMN ID for a different first access network device.

[0175] In one example, combining Figure 4 The multiple target PLMN IDs in the second EPLMN list may include the target PLMN IDs of OP2 access network devices and OP3 access network devices.

[0176] As another possible implementation, when there are multiple terminal devices and multiple first access network equipment operators, the core network equipment of the second access network equipment operator can send response messages including different EPLMN lists to different terminal devices.

[0177] In one example, combining Figure 4The target PLMN ID in the EPLMN list of the first OP1 UE may include the target PLMN ID of the OP2 access network device. The target PLMN ID in the EPLMN list of the second OP1 UE may include the target PLMN ID of the OP3 access network device.

[0178] One possible implementation, Figure 10 This is a flowchart illustrating another network access method provided in an embodiment of this application. Figure 10 As shown, the network access method in this application may further include the following S801.

[0179] S801. In the event of a failure of the second access network equipment, the core network equipment of the first access network equipment operator sends a broadcast command to the first access network equipment.

[0180] It should be noted that the management personnel of the first access network equipment operator and the management personnel of the second access network equipment operator have pre-signed a network disaster recovery agreement.

[0181] As one possible implementation, the core network equipment of the first access network equipment operator can determine the location information of the faulty second access network equipment and send a broadcast command to the first access network equipment based on the location of the second access network equipment.

[0182] In one example, the core network equipment of the first access network equipment operator can determine the first access network equipment whose distance from the faulty second access network equipment is less than a distance threshold based on the location information of the faulty second access network equipment, and send a broadcast command to the first access network equipment.

[0183] In some embodiments, the network management device can monitor whether the second access network device is faulty, and if the network management device detects that the second access network device is faulty, it can send a broadcast command to the first access network device.

[0184] The distance threshold can be set as needed. For example, it can be set to 100 meters.

[0185] This application embodiment can divide the network access device into functional modules or functional units according to the above method examples. For example, each function can be divided into a separate functional module or functional unit, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or in software functional modules or functional units. The module or unit division in this application embodiment is illustrative and only represents one logical functional division; other division methods may be used in actual implementation.

[0186] When dividing each function into modules according to its corresponding function. Figure 11 A schematic diagram of a network access device 900 is shown, which is applied to a first access network device. The network access device 900 can be used to perform the functions of the network access device involved in the above embodiments. Figure 11 The network access device 900 shown may include: a processing unit 901; the processing unit 901 is configured to broadcast a target Public Land Mobile Network ID (PLMN ID) in the event of a failure of the second access network device, so that the terminal device of the operator of the second access network device can access the network according to the target PLMN ID; the first access network device and the second access network device are access network devices of different operators; the target PLMN ID is a PLMN ID that is not in the list of PLMNs that the terminal device is prohibited from accessing and is pre-configured.

[0187] Optionally, the device further includes: a receiving unit 902 and a sending unit 903; after broadcasting the target Public Land Mobile Network ID (PLMN ID), the receiving unit 902 is used to receive a first registration request message sent by the terminal device based on the target PLMN ID; the sending unit 903 is used to send the first registration request message to the core network equipment of the first access network equipment operator, so that the core network equipment of the first access network equipment operator can register the terminal device on the network.

[0188] Optionally, the processing unit 901 is also configured to stop broadcasting the target PLMN ID if the second access network device is not faulty.

[0189] Figure 12 A schematic diagram of another network access device 1000 is shown, applied to a terminal device of a second access network equipment operator. This network access device 1000 can be used to perform the functions of the network access device involved in the above embodiments. The device includes: a receiving unit 1001 and a processing unit 1002; the receiving unit 1001 is used to receive a first registration request message sent by the terminal device of the second access network equipment operator through a target PLMN ID broadcast by the first access network equipment in the event of a failure of the second access network equipment; the first access network equipment and the second access network equipment are access network equipment of different operators; the target PLMN ID is a pre-configured PLMN ID that is not in the PLMN list that the terminal device is prohibited from accessing; the processing unit 1002 is used to perform network registration for the terminal device based on the first registration request message.

[0190] Optionally, the processing unit 1002 is specifically configured to: send a first request message to the core network equipment of the second access network equipment operator; the first request message is used to request the subscription information of the terminal equipment; receive the subscription information sent by the core network equipment of the second access network equipment operator, and, if the subscription information includes fault service authorization information, register the terminal equipment with the network; the fault service authorization information is used to indicate that the terminal equipment has the right to access the network of the first access network equipment operator when the second access network equipment fails.

[0191] Optionally, the processing unit 1002 is further configured to send a broadcast command to the first access network device so that the first access network device broadcasts the target PLMN ID.

[0192] Figure 13 A schematic diagram of another network access device 1100 is shown, applied to the core network equipment of the first access network equipment operator. This network access device 1100 can be used to perform the functions of the network access device involved in the above embodiments. The device includes: a receiving unit 1101 and a processing unit 1102; the receiving unit 1101 is used to receive a first registration request message sent by the terminal equipment of the second access network equipment operator through the target PLMN ID broadcast by the first access network equipment in the event of a failure of the second access network equipment; the first access network equipment and the second access network equipment are access network equipment of different operators; the target PLMN ID is a pre-configured PLMN ID that is not in the PLMN list that the terminal equipment is prohibited from accessing; the processing unit 1102 is used to perform network registration for the terminal equipment based on the first registration request message.

[0193] Optionally, the processing unit 1102 is specifically configured to: send a first request message to the core network equipment of the second access network equipment operator; the first request message is used to request the subscription information of the terminal equipment; receive the subscription information sent by the core network equipment of the second access network equipment operator, and, if the subscription information includes fault service authorization information, register the terminal equipment on the network; the fault service authorization information is used to indicate that the terminal equipment has the right to access the network of the first access network equipment operator when the second access network equipment fails; and register the terminal equipment on the network.

[0194] Figure 14A schematic diagram of another network access device 1200 is shown, applied to the core network equipment of a second access network equipment operating entity. This network access device 1200 can be used to perform the functions of the network access device involved in the above embodiments. The device includes: a core network equipment applied to the second access network equipment operating entity, and includes: a receiving unit 1201 and a sending unit 1202; the receiving unit 1201 is used to receive a second registration request message sent by a terminal device of the second access network equipment operating entity; the sending unit 1202 is used to send a response message including a target PLMN ID to the terminal device, so that the terminal device can access the network based on the target PLMN ID broadcast by the first access network equipment in the event of a failure of the second access network equipment; the first access network equipment and the second access network equipment are access network equipment of different operating entities; the target PLMN ID is a pre-configured PLMN ID that is not in the PLMN list that the terminal device is prohibited from accessing.

[0195] Optionally, when there are multiple terminal devices and multiple first access network device operators, there are multiple target PLMN IDs, and the first access network devices of different operators broadcast different target PLMN IDs; the sending unit 1202 is specifically used to: send different response messages to different terminal devices; the different response messages include different target PLMN IDs.

[0196] This application also provides a computer-readable storage medium. All or part of the processes in the above method embodiments can be implemented by a computer program instructing related hardware. This program can be stored in the computer-readable storage medium, and when executed, it can include the processes of the above method embodiments. The computer-readable storage medium can be an internal storage unit of the network access device (including a data transmitter and / or a data receiver) of any of the foregoing embodiments, such as the hard disk or memory of the network access device. The computer-readable storage medium can also be an external storage device of the terminal device, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the terminal device. Further, the computer-readable storage medium can include both the internal storage unit of the network access device and external storage devices. The computer-readable storage medium is used to store the computer program and other programs and data required by the network access device. The computer-readable storage medium can also be used to temporarily store data that has been output or will be output.

[0197] It should be noted that the terms "first" and "second," etc., in the specification, claims, and drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0198] It should be understood that in this application, "at least one (item)" means one or more, "more than one" means two or more, "at least two (items)" means two or three or more, and "and / or" is used to describe the relationship between related objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0199] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0200] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another apparatus, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0201] The units described as separate components may or may not be physically separate. A component shown as a unit can be one or more physical units; that is, it can be located in one place or distributed in multiple different locations. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0202] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0203] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solutions of the embodiments of this application, essentially, or the parts that contribute to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0204] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A network access method, characterized by, The method applied to a first access network device comprises: In the case of failure of a second access network device, a target public land mobile network identifier (PLMN ID) is broadcasted, so that a terminal device of an operating subject of the second access network device accesses a network according to the target PLMN ID; the first access network device and the second access network device are access network devices of different operating subjects; the target PLMN ID is outside a PLMN list to which the terminal device is prohibited to access, and is a pre-configured PLMN ID.

2. The method of claim 1, wherein, After the target public land mobile network identifier (PLMN ID) is broadcasted, the method further comprises: A first registration request message sent by the terminal device based on the target PLMN ID is received; The first registration request message is sent to a core network device of the operating subject of the first access network device, so that the core network device of the operating subject of the first access network device performs network registration on the terminal device.

3. The method according to claim 1 or 2, characterized in that, The method further comprises: In the case that the second access network device is not failed, the target PLMN ID is stopped from being broadcasted.

4. A network access method, characterized by, The method applied to a terminal device of an operating subject of a second access network device comprises: In the case of failure of the second access network device, a target PLMN ID broadcasted by a first access network device is received; the first access network device and the second access network device are access network devices of different operating subjects; the target PLMN ID is outside a PLMN list to which the terminal device is prohibited to access, and is a pre-configured PLMN ID; Based on the target PLMN ID, a first registration request message is sent to a core network device of an operating subject of the first access network device through the first access network device, so that the core network device of the operating subject of the first access network device performs network registration on the terminal device.

5. The method of claim 4, wherein, Before the second access network device fails, the method further comprises: A second registration request message is sent to a core network device of the operating subject of the second access network device; A response message of the second registration request message sent by the core network device of the operating subject of the second access network device is received; the response message of the second registration request message comprises the target PLMN ID.

6. A network access method, characterized by, The method applied to a core network device of an operating subject of a first access network device comprises: In the case of failure of a second access network device, a first registration request message sent by a terminal device of an operating subject of the second access network device through a target PLMN ID broadcasted by the first access network device is received; the first access network device and the second access network device are access network devices of different operating subjects; the target PLMN ID is outside a PLMN list to which the terminal device is prohibited to access, and is a pre-configured PLMN ID; Based on the first registration request message, network registration is performed on the terminal device.

7. The method of claim 6, wherein, The network registration performed on the terminal device based on the first registration request message comprises: A first request message is sent to a core network device of the operating subject of the second access network device; the first request message is used to request subscription information of the terminal device; receiving subscription information sent by a core network device of the second access network device operating subject; the subscription information is sent by the core network device of the second access network device operating subject in a case where the core network device of the second access network device operating subject includes failure service authorization information in the subscription information; the failure service authorization information is used to represent that the terminal device has the permission to access a network of the first access network device operating subject when the second access network device fails; performing network registration on the terminal device.

8. A network access method, characterized by, The method is applied to a core network device of a second access network device operating subject, and the method comprises: receiving a second registration request message sent by a terminal device of the second access network device operating subject; sending a response message including a target PLMN ID to the terminal device, so that the terminal device accesses a network based on the target PLMN ID broadcast by a first access network device in a case where the second access network device fails; the first access network device and the second access network device are access network devices of different operating subjects; and the target PLMN ID is a PLMN ID that is outside a PLMN list to which the terminal device is prohibited to access and is preconfigured.

9. The method of claim 8, wherein, In a case where the number of terminal devices is multiple and the number of first access network device operating subjects is multiple, the number of target PLMN IDs is multiple, and the target PLMN IDs broadcast by first access network devices of different operating subjects are different; the sending of the response message including the target PLMN ID to the terminal device comprises: sending different response messages to different terminal devices; the different response messages include different target PLMN IDs.

10. A network access device, comprising: The apparatus is applied to a first access network device, and the apparatus comprises a processing unit. The processing unit is configured to broadcast a target public land mobile network (PLMN) ID in a case where a second access network device fails, so that a terminal device of the second access network device operating subject accesses a network according to the target PLMN ID; the first access network device and the second access network device are access network devices of different operating subjects; and the target PLMN ID is a PLMN ID that is outside a PLMN list to which the terminal device is prohibited to access and is preconfigured.

11. A network access device, comprising: The apparatus is applied to a terminal device of a second access network device operating subject, and the apparatus comprises a receiving unit and a sending unit. The receiving unit is configured to receive a target PLMN ID broadcast by a first access network device in a case where the second access network device fails; the first access network device and the second access network device are access network devices of different operating subjects; and the target PLMN ID is a PLMN ID that is outside a PLMN list to which the terminal device is prohibited to access and is preconfigured. The sending unit is configured to send a first registration request message to a core network device of the first access network device operating subject through the first access network device based on the target PLMN ID, so that the core network device of the first access network device operating subject performs network registration on the terminal device.

12. A network access device, comprising: A core network device applied to a first access network device operation subject; the device comprises a receiving unit and a processing unit; The receiving unit is configured to receive a first registration request message sent by a terminal device of a second access network device operation subject through a target PLMN ID broadcast by the first access network device in a case where the second access network device fails; the first access network device and the second access network device are access network devices of different operation subjects; and the target PLMN ID is a PLMN ID preconfigured outside a PLMN list to which the terminal device is prohibited to access. The processing unit is configured to perform network registration on the terminal device based on the first registration request message.

13. A network access device, comprising: A core network device applied to a second access network device operation subject, the device comprises a receiving unit and a sending unit; The receiving unit is configured to receive a second registration request message sent by a terminal device of the second access network device operation subject; The sending unit is configured to send a response message comprising a target PLMN ID to the terminal device, so that the terminal device accesses a network based on the target PLMN ID broadcast by a first access network device in a case where the second access network device fails; the first access network device and the second access network device are access network devices of different operation subjects; and the target PLMN ID is a PLMN ID preconfigured outside a PLMN list to which the terminal device is prohibited to access.

14. A network access system, characterized by The device comprises a first access network device, a terminal device of a second access network device operation subject, a core network device of a first access network device operation subject, and a core network device of a second access network device operation subject. The first access network device is configured to perform the method of any one of claims 1-3; The terminal device of the second access network device operation subject is configured to perform the method of claim 4 or 5; the core network device of the first access network device operation subject is configured to perform the method of claim 6 or 7; and the core network device of the second access network device operation subject is configured to perform the method of claim 8 or 9.

15. A computer readable storage medium characterized by: The readable storage medium stores instructions, when the instructions are executed, the method of any one of claims 1-3, or claim 4 or 5, or claim 6 or 7, or claim 8 or 9 is implemented.

16. An electronic device, comprising: The device comprises a processor, a memory, and a communication interface; the communication interface is configured to communicate with other devices or networks; The memory is configured to store one or more programs comprising computer execution instructions; when the electronic device is running, the processor executes the computer execution instructions stored in the memory, so that the electronic device performs the method of any one of claims 1-3, or claim 4 or 5, or claim 6 or 7, or claim 8 or 9. The computer instructions are executed by the processor to implement the method of any one of claims 1-3, or claim 4 or 5, or claim 6 or 7, or claim 8 or 9.

17. A computer program product comprising computer instructions, characterized in that, ​

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