WO2019062247A1

WO2019062247A1 - Network recovery method and device

Info

Publication number: WO2019062247A1
Application number: PCT/CN2018/094136
Authority: WO
Inventors: 李洪; 舒林
Original assignee: 华为技术有限公司
Priority date: 2017-09-30
Filing date: 2018-07-02
Publication date: 2019-04-04
Also published as: CN109600829A; CN109600829B

Abstract

A network recovery method and device, used for solving the problem that a user equipment (UE) cannot acquire a network service due to the states between the UE and a network device not being synchronized. The method comprises: a mobile management entity (MME) deletes information corresponding to an IP multimedia system (IMS) bearer when determining that a paging message is sent to a UE at least once and a response is not received within a first preset period of time every time after the sending; the MME stores a globally unique temporary identifier (GUTI) of the UE, starts a periodic paging timer corresponding to the UE, and sends a paging message to the UE corresponding to the GUTI according to the periodic paging timer; and the MME, if receiving a service request signaling from the UE, instructs the UE to reacquire a service.

Description

Method and device for restoring network

The present application claims priority to Chinese Patent Application No. JP-A No. No. No. No. No. No. No. No. No. No. No. No. No. No. No. in.

Technical field

The present application relates to the field of communications, and in particular, to a method and device for restoring a network.

Background technique

At present, most network devices have the function of reclaiming user equipment (UE), that is, the function of the evolved packet system (EPS) between the UE and the network device. The function is specifically: when the UE enters the idle state, if the uplink and downlink data or the signaling transmission on the EPS bearer between the UE and the network device reaches a preset time, the network device sends a paging message to the UE, so that the UE Entering the connection state and triggering the UE's deregistration process on the network side, it is expected that the UE re-registers.

However, if the UE does not have a network signal, that is, loses the network, due to entering the elevator or the like before receiving the paging message sent by the network device, the UE cannot respond to the paging of the network device, so that the network device does not receive the preset time. When the response to the UE is reached, the context of the UE is directly deleted. After the UE recovers the network, if the cell information of the UE is not changed, the UE does not send a tracking area update (TAU) request to the network device, so that the UE cannot timely perceive that the network device has deleted the context of the UE. In this way, the UE and the network device are not synchronized, that is, the UE is in the registration state, and the UE is in the de-registered state at the network device, so that the UE cannot obtain the service provided by the network for a long time.

Summary of the invention

The present application provides a method and a device for restoring a network, which solves the problem that the UE cannot obtain the service provided by the network due to the state of the UE and the network device being out of synchronization.

To achieve the above objectives, the present application adopts the following technical solutions:

In a first aspect, the present application provides a method for restoring a network, the method comprising: a mobility management entity (MME) determining to send a paging message to a UE at least once, and each time after transmitting the paging message If the response of the UE is not received in the first preset time, the information corresponding to the bearer is deleted, and the globally unique temporary identifier (GUTI) corresponding to the UE is stored, and the periodicity corresponding to the UE is started. a paging timer, and the MME periodically sends a paging message to the UE corresponding to the GUTI according to the periodic paging timer corresponding to the UE, and if the MME determines that the service request signaling sent by the UE is received, the MME indicates The UE reacquires the service. The bearer is a logical path between the UE and the network device, and the time when there is no uplink and downlink data or signaling transmission on the bearer reaches a second preset time.

The method for restoring a network provided by the application, the MME determines that the paging message is sent to the UE at least once, and each time the response of the UE is not received within the first preset time after the paging message is sent And deleting the corresponding information of the bearer, and storing the GUTI corresponding to the UE, starting a periodic paging timer corresponding to the UE, and the MME may periodically correspond to the GUTI according to the periodic paging timer corresponding to the UE. The UE sends a paging message, and if the MME determines that the service request signaling sent by the UE is received, the UE is instructed to re-acquire the service. In this way, after deleting the information corresponding to the bearer, the MME periodically times the UE corresponding to the GUTI according to the periodic paging timer, so that the UE can respond to the MME in time after restoring the network, so that the UE synchronizes with the network device. Status to get the services provided by the network.

With reference to the first aspect, in a possible implementation, the MME periodically sends a paging message to the UE corresponding to the GUTI according to the periodic paging timer corresponding to the UE, which may include: When the call timer reaches the third preset time, the paging message is sent to the UE corresponding to the GUTI, and if the MME determines that the service request signaling is not received within the first preset time, the periodic paging timer is restarted, and When it is determined that the periodic paging timer reaches the third preset time, the paging message is resent to the UE corresponding to the GUTI.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the MME instructs the UE to re-acquire the service, which may include: the MME sends the service rejection signaling to the UE; or the MME stores all the services according to the The information corresponding to the deleted bearer respectively establishes an associated radio bearer. The radio bearer is a data path between the UE and the network device for transmitting data packets.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the service rejection signaling includes an implicitly separated cause value, where the implicitly separated cause value is used to indicate that the UE re-registers in the MME. After the service rejection signaling is sent to the UE, the method may further include: the MME receiving the registration request sent by the UE, and sending the signaling that the registration is successful to the UE.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, after the MME establishes an associated radio bearer according to the information corresponding to all the undeleted bearers that are stored, the MME may further include: the MME receiving the UE. The transmitted request to re-establish the bearer and send the signaling to the UE that the bearer is successfully established.

In a second aspect, the present application provides a method for restoring a network, where the method includes: when a UE is in a state incapable of responding to a paging, starts triggering a TAU timer, and after recovering to a state capable of responding to the paging, determining to trigger a TAU If the timer is greater than or equal to the preset time, the UE sends a TAU request to the MME, and the UE may receive the signaling sent by the MME, and re-acquire the service according to the signaling. The signaling is TAU reject signaling, or the signaling is TAU consent signaling.

The method for restoring the network provided by the application, the UE may start triggering the TAU timer when the state is unable to respond to the paging, and determine whether the trigger TAU timer is greater than or equal to the preset after returning to the state capable of responding to the paging. The time, if the triggering TAU timer is greater than or equal to the preset time, the UE sends a TAU request to the MME, and the UE may receive the signaling sent by the MME, and re-acquire the service according to the signaling. In this way, if the MME deletes the information corresponding to the bearer between the UE and the network device during the UE's network loss, the UE starts the triggering TAU timer when the network is lost, and sends the aperiodic TAU to the MME after the network is restored. Request to know the status of the network device, so as to synchronize the status of the network device as soon as possible to obtain the services provided by the network.

With reference to the second aspect, in a possible implementation manner, the signaling is TAU reject signaling, the TAU reject signaling includes an implicitly separated cause value, and the implicitly separated cause value is used to indicate that the UE re-registers. At this time, the UE re-acquires the service according to the signaling, and the method may include: the UE sends a registration request to the MME according to the implicit separation reason value, and receives the signaling that the MME sends the registration success.

With reference to the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the signaling is TAU consent signaling, where the TAU consent signaling includes an active bearer corresponding between the UE and the network device. information. At this time, the UE re-acquires the service according to the signaling, which may include: the UE deletes the information corresponding to the first bearer in the deactivated state according to the TAU consent signaling, and sends a request for re-establishing the first bearer to the MME, and the UE receives the The signaling sent by the MME to establish a successful first bearer. The first bearer is a logical path between the UE and the network device, and the information corresponding to the first bearer is information that is deleted by the MME during the state that the UE is in a state incapable of responding to the paging.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the method may further include: determining that the UE is in a state incapable of responding to the paging when the network is lost.

In a third aspect, the application provides an MME, which may include a module capable of implementing the method in the foregoing first aspect and various embodiments thereof.

In a fourth aspect, the application provides a UE, which may include a module capable of implementing the method in the foregoing second aspect and various embodiments thereof.

In a fifth aspect, the application provides an apparatus, the apparatus comprising: at least one processor, and a memory. The memory is for storing a computer program such that when the computer program is executed by at least one processor, a possible implementation of the first aspect or the first aspect, a recovery of any of the possible implementations of the second aspect or the second aspect is achieved The method of the network.

In a sixth aspect, the present application provides a computer storage medium having stored thereon a computer program, the program being executed by the processor to implement a possible implementation of the first aspect or the first aspect, the second aspect or the second aspect A method of restoring a network in any of the implementations.

DRAWINGS

FIG. 1 is a simplified schematic diagram of a system architecture that can be applied to an embodiment of the present application according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a UE according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of an MME according to an embodiment of the present disclosure;

4 is a flowchart of a method for restoring a network provided by an MME side according to an embodiment of the present application;

FIG. 5 is a flowchart of a method for restoring a network provided by a UE side according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of another MME according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of another MME according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of another UE according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of another UE according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram of another UE according to an embodiment of the present application.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the embodiments of the present application describe the terms involved in the embodiments of the present application.

1. Registration: When the user turns on the UE, the UE can register after startup. Specifically, the UE may send a registration request including the registration information of the UE to the MME, and the MME may interact with a serving gateway (SGW)/packet data network gateway (PGW) to register the UE. The information is verified, and after the verification is passed, the signaling of successful registration is sent to the UE. At this time, the UE is successfully registered, and the registration bearer between the UE and the network device is established.

2. Single bearer: It means that there is only one bearer between the UE and the network device. Specifically, after the UE is successfully registered, the network device can transmit the service information on the registration bearer according to the configuration of the operator. The registered bearer is the service bearer, and the UE can obtain the service provided by the network by registering the bearer.

3. Multi-bearer: Refers to at least two bearers between the UE and the network device. Specifically, after the UE is successfully registered, the network device can establish a service bearer with the UE according to the configuration of the operator, such as an IP multimedia subsystem (IMS) bearer, a bearer for providing the Internet service, and the like. The UE obtains the service by establishing a good service bearer.

FIG. 1 is a simplified schematic diagram of a system architecture that can be applied to an embodiment of the present application. As shown in FIG. 1 , the system architecture may include: UE 11, MME 12, and SGW/PGW 13.

The UE 11 performs signaling interaction with the MME 12 through the access network device, and the UE 11 performs user plane data interaction with the SGW/PGW 13 through the access network device.

The UE 11 may be a device that provides voice and/or data connectivity to the user. The UE 11 may be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, or may be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that is connected to the wireless device. A radio access network (RAN) exchanges languages and/or data, such as personal communication service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loops (wireless local loops). WLL) station, personal digital assistant (PDA) and other equipment.

The MME 12 is mainly responsible for access control, mobility management, session management, and routing functions.

SGW/PGW 13, is mainly responsible for user plane processing, and is responsible for routing and forwarding of data packets.

It should be noted that the UE 11 is in a state incapable of responding to the paging, which may be due to the UE 11 losing network, or may be due to the fact that the UE 11 supporting dual-card dual standby does not have uplink radio resources when receiving the paging message, and may also be due to The method for restoring the network provided by the embodiment of the present application can be applied to scenarios in which the UE 11 cannot respond to paging. In the embodiment of the present application, the UE 11 is lost in the network, and the UE 11 is in a state incapable of responding to the paging.

In addition, the bearer involved in the embodiment of the present application refers to a logical path between the UE 11 and a network device (which may include a base station, an MME 12, and an SGW/PGW 13, etc.), and the radio bearer refers to the UE 11 and The data path between the network devices for transmitting data packets or signaling, the bearer and the radio bearer are in one-to-one correspondence. When the UE 11 and the network device perform uplink and downlink data or signaling transmission, the bearer and the radio bearer between the UE 11 and the network device need to be established. When the UE 11 is in the idle state, the network device deletes the radio bearer.

FIG. 2 is a schematic diagram of a composition of a UE according to an embodiment of the present disclosure. As shown in FIG. 2, the UE may include: at least one processor 21, a memory 22, a communication interface 23, and a communication bus 24.

The processor 21 is a control center of the UE, and may be a processor or a collective name of a plurality of processing elements. For example, the processor 21 is a central processing unit (CPU), may be an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application. For example, one or more digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs).

In a particular implementation, as an embodiment, processor 21 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. Moreover, as an embodiment, the UE may include multiple processors, such as processor 21 and processor 25 shown in FIG. 2. Each of these processors can be a single core processor (CPU) or a multi-core processor (multi-CPU). A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data, such as computer program instructions.

In a particular implementation, processor 21 may perform various functions of the UE by running or executing a software program stored in memory 22, as well as invoking data stored in memory 22.

The memory 22 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type that can store information and instructions. The dynamic storage device can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, and a disc storage device. (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be Any other media accessed, but not limited to this. Memory 22 may be present independently and coupled to processor 21 via communication bus 24. The memory 22 can also be integrated with the processor 21.

In a particular implementation, the memory 22 is used to store data in the present application and to execute the software program of the present application.

The communication interface 23 uses devices such as any transceiver for communicating with other devices or communication networks, such as RAN, wireless local area networks (WLAN), and the like. The communication interface 23 may include a receiving unit that implements a receiving function, and a transmitting unit that implements a transmitting function.

The communication bus 24 may be an industry standard architecture (ISA) bus, a peripheral component interconnect (PCI) bus, or an extended industry standard architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 2, but it does not mean that there is only one bus or one type of bus.

FIG. 3 is a schematic diagram of a composition of an MME according to an embodiment of the present disclosure. As shown in FIG. 3, the MME may include: at least one processor 31, a memory 32, a communication interface 33, and a communication bus 34.

The processor 31 is a control center of the MME, and may be a processor or a collective name of a plurality of processing elements. For example, processor 31 is a CPU, and may be an ASIC, or one or more integrated circuits configured to implement embodiments of the present application, such as one or more DSPs, or one or more FPGAs.

In a particular implementation, as an embodiment, processor 31 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. Moreover, as an embodiment, the MME may include a plurality of processors, such as the processor 31 and the processor 35 shown in FIG. Each of these processors can be a single core processor or a multi-core processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data, such as computer program instructions.

In a particular implementation, processor 31 may perform various functions of the MME by running or executing a software program stored in memory 32, as well as invoking data stored in memory 32.

Memory 32 may be a ROM or other type of static storage device that may store static information and instructions, RAM or other types of dynamic storage devices that may store information and instructions, or may be EEPROM, CD-ROM or other optical disk storage, optical disk storage. (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be Any other media accessed, but not limited to this. Memory 32 may be present independently and coupled to processor 31 via communication bus 34. The memory 32 can also be integrated with the processor 31.

In a particular implementation, memory 32 is used to store data in the present application and to execute the software program of the present application.

Communication interface 33, using devices such as any transceiver, for communicating with other devices or communication networks, such as SGW/PGW, RAN, WLAN, and the like. The communication interface 33 may include a receiving unit that implements a receiving function, and a transmitting unit that implements a transmitting function.

The communication bus 34 can be an ISA bus, a PCI bus, or an EISA bus. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 3, but it does not mean that there is only one bus or one type of bus.

It should be noted that, in the case that the MME does not receive the response, the MME deletes the bearer in the information corresponding to the bearer, which may be a service bearer such as an IMS bearer. The information corresponding to the bearer is not specifically limited. In the embodiment of the present application, the MME deletes the information corresponding to the IMS bearer as an example for description.

In order to solve the problem that the UE cannot obtain the service provided by the network due to the status of the UE and the network device being out of synchronization, the embodiment of the present application provides a method for restoring the network, and the basic idea is to let the UE know that the MME has deleted the UE and the network device as soon as possible. The corresponding information is carried between the UE, and the state of the network device is synchronized. The solution of the present application can provide a solution from the UE side and the MME side, respectively. 4 is a flowchart of a method for restoring a network provided by an MME from the MME side. As shown in FIG. 4, the method may include:

Once the UE is successfully registered, it needs to obtain the voice-based VoIP (VoLTE) provided by the network, so that the UE can answer the call. At this time, in a single bearer scenario, the registered bearer is an IMS bearer, and the UE can obtain a VoLTE service by registering the bearer. In a multi-bearer scenario, the UE may establish an IMS bearer with the network device to obtain a VoLTE service. The UE can simultaneously establish a radio bearer associated with the IMS bearer for transmitting uplink and downlink data with the network device.

401. The SGW/PGW determines that the idle reclaim bearer timer corresponding to the IMS bearer reaches a second preset time.

After the radio bearer associated with the IMS bearer is established, the SGW/PGW may start the corresponding idle reclaim bearer timer when acquiring the uplink and downlink data from the radio bearer, and delete the radio after the data transmission is completed. Hosted. And the SGW/PGW may perform the following procedure to the MME in step 402 when it is determined that the idle reclaiming bearer timer reaches the second preset time, that is, the time when the uplink/downlink data or the signaling transmission does not reach the second preset time on the bearer. Sending a delete bearer request for requesting deletion of information corresponding to the IMS bearer.

It should be noted that the second preset time may be pre-configured in the SGW/PGW according to the actual situation. The specific value of the second preset time is not specifically limited herein.

402. The SGW/PGW sends a delete bearer request to the MME.

403. The MME receives the delete bearer request sent by the SGW/PGW.

404. The MME sends a paging message to the UE at least once.

It should be noted that, in the embodiment of the present application, the number of times the paging message is sent to the UE may be configured in the MME in advance, and the number of times the MME pages the UE is not specifically limited herein.

405. The MME deletes the information corresponding to the IMS bearer in the case that the response of the UE is not received in the first preset time after the paging message is sent.

After the MME receives the delete bearer request, the MME may send the paging message to the UE at least once, but if the UE is in a state incapable of responding to the paging, the MME may cause the MME to send the paging message each time. The UE's response cannot be received within a preset time. At this time, the MME can directly delete the information corresponding to the IMS bearer.

For example, if the number of times the pre-configured MME sends a paging message to the UE is two, and the first preset time is 2s, the MME may first send a paging message to the UE and determine that it does not receive within 2 seconds. In the case of the response to the UE, the paging message is sent to the UE again. If the MME determines that the response of the UE is still not received within 2 s, then the MME may delete the information corresponding to the IMS bearer.

406. The MME sends a delete bearer response to the SGW/PGW.

407. The SGW/PGW receives the delete bearer response sent by the MME.

It should be noted that after the MME deletes the information corresponding to the IMS bearer and sends the delete bearer response to the SGW/PGW, the following steps 408-418 may be performed:

408. The MME stores the GUTI corresponding to the UE, and starts a periodic paging timer corresponding to the UE.

The MME may store the GUTI corresponding to the UE, and start a periodic paging timer corresponding to the UE. The periodic paging timer is used by the MME to periodically send a paging message to the UE, so that the UE can be timely after recovering the network. In response to the MME, it is learned that the MME has deleted the information corresponding to the IMS bearer between itself and the network device.

409. The UE recovers to a state capable of responding to the paging and re-resident.

If the UE is restored to the state capable of responding to the paging, for example, the UE recovers the network after the network is lost, the UE may receive a tracking area identity (TAI) broadcasted by the cell, and determine that the received TAI includes In the tracking area identification list (TAI list) stored by itself. At this time, according to the 24.301 protocol, since the cell information of the UE is not changed, the UE does not send a TAU request to the MME.

It should be noted that, in the embodiment of the present application, the UE may return to the state capable of responding to the paging, or may perform the process of performing the step 406 to the step 408, or may perform the following step 410: the MME sends the paging message to the UE. in the process of.

410. The MME periodically sends a paging message to the UE corresponding to the GUTI according to the periodic paging timer corresponding to the UE.

411. The UE sends a service request signaling to the MME.

412. The MME receives the service request signaling sent by the UE.

After the MME stores the GUTI corresponding to the UE and starts the periodic paging timer corresponding to the UE, the MME may periodically send the homing to the UE corresponding to the GUTI according to the periodic paging timer corresponding to the UE. Call the message. Specifically, the MME may send a paging message to the UE corresponding to the GUTI when determining that the periodic paging timer corresponding to the UE reaches the third preset time, and determine whether the UE can receive the first preset time. The service request signaling, if the service request signaling sent by the UE is received in the first preset time, indicates that the UE has recovered the network, and the MME may perform the following step 413. If the service request signaling sent by the UE is not received in the first preset time, it indicates that the UE is still in the lost network state, and the MME may restart the periodic paging timer corresponding to the UE, and continue to determine the When the periodic paging timer reaches the third preset time, the paging message is sent to the UE corresponding to the GUTI until the MME determines that the service request signaling sent by the UE is received within the first preset time.

It should be noted that, in the embodiment of the present application, the first preset time in step 405 and the third preset time in step 412 may be pre-configured in the MME according to actual conditions, where the embodiment of the present application is The specific values of the first preset time and the third preset time are not specifically limited.

Exemplarily, assuming that the preset first preset time is 2 seconds (s), and the third preset time, that is, the periodic paging timer has a timing period of 5 s, the MME may send the delete bearer response after The periodic paging timer is started, and when the periodic paging timer reaches 5 s, the paging message is sent to the UE. At this time, if the MME receives the service request signaling sent by the UE within 2s, the MME may perform the following step 413: if the MME does not receive the service request signaling within 2s, the MME may restart the periodic paging timer. And when the periodic paging timer reaches 5s, the paging message is continued to be sent to the UE until the service request signaling is received within 2s.

After the MME receives the service request signaling sent by the UE, the MME may be instructed to re-acquire the service. Specifically, the following step 413 may be performed:

413. The MME establishes an associated radio bearer according to the information corresponding to all the undeleted bearers that are stored.

The MME may interact with the SGW/PGW and the UE according to the information of all the undeleted bearers that are stored in the multi-bearer scenario, and establish a radio bearer associated with the bearer respectively.

Exemplarily, the bearer between the UE and the network device includes a registration bearer, an IMS bearer, and a bearer for providing the Internet service. In step 405, the MME deletes the information corresponding to the IMS bearer, and then the MME can establish and register the bearer. The associated radio bearers and establish a radio bearer associated with the bearer used to provide the internet service.

414. The UE deletes information corresponding to the IMS bearer.

After the MME establishes the associated radio bearer according to the information corresponding to all the undeleted bearers, the UE can match the information corresponding to the bearer stored by the MME with the established radio bearer, and learn that the IMS bearer is not associated with the IMS bearer. The radio bearer, that is, the information corresponding to the IMS bearer is the information deleted by the MME. At this time, according to the 24.301 protocol, the UE may delete the information corresponding to the IMS bearer.

415. The UE sends a request for re-establishing an IMS bearer to the MME.

After the UE deletes the information corresponding to the IMS bearer, according to the IR.92 standard, the UE needs to re-establish the IMS bearer with the network device to re-acquire the service provided by the network. At this time, the UE may send a request for re-establishing the IMS bearer to the MME.

416. The MME receives a request for re-establishing an IMS bearer sent by the UE.

After the MME receives the request for re-establishing the IMS bearer sent by the UE, the IMS bearer between the network device and the UE may be re-established, and after the establishment is successful, the following step 417 is performed:

417. The MME sends, to the UE, signaling that the IMS bearer is successfully established.

418. The UE receives signaling that the IMS bearer sent by the MME is successfully established.

It should be noted that, in the scenario of a single bearer, the information corresponding to the deleted IMS bearer in step 405 may be replaced by: the MME deletes the context of the UE, and step 413 may be replaced by: the MME sends a service reject to the UE. Signaling, the service reject signal includes an implicitly detached cause value, and the implicitly separated cause value is used to instruct the UE to re-register. Correspondingly, step 414-step 418 can be replaced by: after receiving the service rejection signaling, the UE re-registers to obtain the service provided by the network.

FIG. 5 is a flowchart of a method for restoring a network provided by a UE side according to an embodiment of the present application. As shown in FIG. 5, the method may include:

501. The SGW/PGW determines that the idle reclaim bearer timer corresponding to the IMS bearer reaches a second preset time.

502. The SGW/PGW sends a delete bearer request to the MME.

503. The MME receives the delete bearer request sent by the SGW/PGW.

It should be noted that the specific description of the steps 501 to 503 in the embodiment of the present application is the same as the specific description of the steps 401 to 403 in another embodiment of the present invention, and the steps 501 to 503 in the embodiment of the present application. For a detailed description, refer to the detailed description of the corresponding steps in step 401 to step 403 in another embodiment, and details are not described herein again.

504. The UE starts to trigger a TAU timer when the UE is in a state incapable of responding to the paging.

The UE may start the triggering TAU timing when the status of the UE and the MME is not synchronized because the MME deletes the information corresponding to the bearer during the state that the UE is in the state of being unable to respond to the paging. Device. Exemplarily, the UE may start triggering a TAU timer when the network is lost.

505. The MME sends a paging message to the UE at least once.

506. The MME deletes the information corresponding to the IMS bearer in the case that the response of the UE is not received in the first preset time after the paging message is sent.

507. The MME sends a delete bearer response to the SGW/PGW.

508. The SGW/PGW receives the delete bearer response sent by the MME.

It should be noted that the specific description of the steps 505 to 508 in the embodiment of the present application is the same as the specific description of the steps 404 to 407 in another embodiment of the present invention. For the step 505 to the step 508 in the embodiment of the present application, For a detailed description, refer to the detailed description of the corresponding steps in step 404 to step 407 in another embodiment, and details are not described herein again.

509. The UE resumes the state capable of responding to the paging, re-resident, and determines whether the triggered TAU timer is greater than or equal to the preset time.

510. If the triggered TAU timer is greater than or equal to the preset time, the UE sends a TAU request to the MME.

After the UE is restored to the state capable of responding to the paging, the UE may re-stay and determine whether the triggered TAU timer is greater than or equal to the preset time. If the triggered TAU timer is greater than or equal to the preset time, the UE may The MME sends a TAU request.

It should be noted that if the preset time is set to be small, that is, the UE will send a TAU request to the MME immediately after returning to the state capable of responding to the paging, which not only causes the signaling burden on the network side to be excessive. Large, at the same time, the power consumption of the UE is increased, and the probability that the UE is paged is very low, so that the TAU request is useless, because in the case that the network is lost in a short time. The preset time is not only required to reduce the signaling burden on the network side and the power consumption of the UE, but also to solve the problem that the UE cannot obtain the service provided by the network due to the state of the UE and the network device being out of synchronization.

511. The MME receives a TAU request sent by the UE.

It should be noted that after the MME receives the TAU request sent by the UE, the MME may send signaling to the UE, so that the UE reacquires the service according to the signaling. Specifically, the following steps 512-518 can be performed:

512. The MME sends TAU consent signaling to the UE.

The MME may send the TAU consent signaling to the UE, where the TAU consent signaling includes information corresponding to the bearer in the activated state between the UE and the network device.

513. The UE receives the TAU consent signaling sent by the MME.

514. The UE deletes information corresponding to the IMS bearer in the deactivated state according to the TAU consent signaling.

After the UE receives the TAU consent signaling sent by the MME, the information corresponding to the bearer stored in the MME is matched with the information corresponding to the bearer in the TAU consent signaling, so that the IMS bearer is deactivated. The information indicating that the IMS bearer is the information that the MME deletes during the UE's network loss. At this time, according to the 24.301 protocol, the UE may delete the information corresponding to the IMS bearer.

515. The UE sends a request for re-establishing an IMS bearer to the MME.

516. The MME receives a request for re-establishing an IMS bearer sent by the UE.

517. The MME sends, to the UE, signaling that the IMS bearer is successfully established.

518. The UE receives signaling that the IMS bearer sent by the MME is successfully established.

It should be noted that, in a scenario of a single bearer, the information corresponding to the deleted IMS bearer in step 506 may be replaced by: the MME deletes the context of the UE, and step 512 may be replaced by: the MME sends TAU reject signaling to the UE, where The TAU reject signaling includes an implicitly separated cause value for instructing the UE to re-register. At this time, correspondingly, the step 513-step 518 can be replaced by: after receiving the TAU reject signaling, the UE re-registers to obtain the service provided by the network.

The solution provided by the embodiment of the present application is mainly introduced from the perspective of interaction between the network elements. It can be understood that each network element, for example, the MME and the UE, in order to implement the above functions, includes hardware structures and/or software modules corresponding to the execution of the respective functions. Those skilled in the art will readily appreciate that the present invention can be implemented in a combination of hardware or hardware and computer software in combination with the algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

The embodiment of the present application may divide the function module into the MME and the UE according to the foregoing method. For example, each function module may be divided according to each function, or two or more functions may be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner.

FIG. 6 is a schematic diagram showing a possible composition of the MME involved in the foregoing and the embodiment. As shown in FIG. 6, the MME may include: a deleting unit 61, and storing. Unit 62, processing unit 63, transmitting unit 64 and receiving unit 65.

The deleting unit 61 is configured to support step 405 in the method for restoring the network shown in FIG. 4, and step 506 in the method for restoring the network shown in FIG. 5.

The storage unit 62 is configured to support the GUTI corresponding to the storage UE described in step 408 of the method for restoring the network shown in FIG. 4 .

The processing unit 63 is configured to support the periodic paging timer corresponding to the UE that is started in step 408 of the method for restoring the network shown in FIG. 4, and step 413.

The sending unit 64 is configured to support step 404, step 406, step 410, and step 417 in the method for restoring the network shown in FIG. 4, and step 505, step 507, and step in the method for restoring the network shown in FIG. 512, step 517.

The receiving unit 65 is configured to support step 403, step 412, and step 416 in the method for restoring the network shown in FIG. 4, and step 503, step 511, and step 516 in the method for restoring the network shown in FIG.

It should be noted that all the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.

The MME provided by the embodiment of the present application is used to perform the foregoing method for restoring a network, and thus the same effect as the method for restoring the network described above can be achieved.

In the case of employing an integrated unit, FIG. 7 shows another possible composition diagram of the MME involved in the above embodiment. As shown in FIG. 7, the MME includes a processing module 71, a communication module 72, and a storage module 73.

The processing module 71 is configured to perform control and management on the action of the MME. For example, the processing module 71 is configured to support the MME to perform the periodic paging timer corresponding to the UE that is started in step 405 and step 408 in FIG. Step 506 in 5, and/or other processes for the techniques described herein. The communication module 72 is configured to support communication between the MME and other network entities. For example, the communication module 72 is configured to support the MME to perform step 403, step 404, step 406, step 410, step 412, step 416, and step 417 in FIG. 4, step 503, step 505, step 507, and step 511 in FIG. Step 512, step 516, and step 517. The storage module 73 is configured to store program codes and data of the MME.

The processing module 71 can be a processor or a controller. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor can also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like. The communication module 72 can be a transceiver, a transceiver circuit, a communication interface, or the like. The storage module 73 can be a memory.

FIG. 8 is a schematic diagram showing a possible composition of the UE involved in the foregoing embodiment. As shown in FIG. 8, the UE may include: a processing unit 81, and a sending unit. Unit 82 and receiving unit 83.

The processing unit 81 is configured to support step 409, step 414 in the method for restoring the network shown in FIG. 4, and step 504, step 509, and step 514 in the method for restoring the network shown in FIG.

The sending unit 82 is configured to support step 411, step 415 in the method for restoring the network shown in FIG. 4, and step 510 and step 515 in the method for restoring the network shown in FIG. 5.

The receiving unit 83 is configured to support step 418 in the method for the UE to perform the recovery network shown in FIG. 4, and perform step 513 and step 518 in the method for restoring the network shown in FIG. 5.

In the embodiment of the present application, further, as shown in FIG. 9, the UE may further include: a determining unit 84.

The determining unit 84 is configured to support the UE to perform a state of determining that the user is unable to respond to the paging when the network is lost.

The UE provided by the embodiment of the present application is configured to perform the foregoing method for restoring a network, so that the same effect as the method for restoring the network described above can be achieved.

In the case of employing an integrated unit, FIG. 10 shows another possible composition diagram of the UE involved in the above embodiment. As shown in FIG. 10, the UE includes a processing module 91, a communication module 92, and a storage module 93.

The processing module 91 is configured to perform control and management on the action of the UE. For example, the processing module 91 is configured to support the UE to perform step 409, step 414 in FIG. 4, step 504, step 509, step 514 in FIG. 5, and/or Other processes of the techniques described herein. The communication module 92 is configured to support communication between the UE and other network entities. For example, the communication module 92 is configured to support the UE to perform step 411, step 415, and step 418 in FIG. 4, step 510, step 513, step 515, and step 518 in FIG. The storage module 73 is configured to store program codes and data of the UE.

The processing module 91 can be a processor or a controller. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor can also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like. The communication module 92 can be a transceiver, a transceiver circuit, a communication interface, or the like. The storage module 93 can be a memory.

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above functional modules is illustrated. In practical applications, the above functions can be allocated according to needs. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. The combination may be integrated into another device, or some features may be ignored or not performed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may be one physical unit or multiple physical units, that is, may be located in one place, or may be distributed to multiple different places. . Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application may be embodied in the form of a software product in the form of a software product in essence or in the form of a contribution to the prior art, and the software product is stored in a storage medium. A number of instructions are included to cause a device (which may be a microcontroller, chip, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions within the technical scope of the present invention should be covered by the scope of the present invention. . Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

A method for restoring a network, the method comprising:

The mobility management entity MME determines to send a paging message to the user equipment UE at least once, and deletes the response of the UE every time within the first preset time after the paging message is sent. Carrying the corresponding information; the bearer is a logical path between the UE and the network device, and the time when there is no uplink and downlink data or signaling transmission on the bearer reaches a second preset time;

The MME stores a globally unique temporary identifier GUTI corresponding to the UE, and starts a periodic paging timer corresponding to the UE;

The MME periodically sends the paging message to the UE corresponding to the GUTI according to the periodic paging timer corresponding to the UE;

And if the MME determines to receive the service request signaling sent by the UE, instructing the UE to re-acquire the service.
The method for restoring a network according to claim 1, wherein the MME periodically sends the paging message to the UE corresponding to the GUTI according to a periodic paging timer corresponding to the UE, including :

When the MME determines that the periodic paging timer reaches a third preset time, the MME sends the paging message to the UE corresponding to the GUTI;

And if the MME determines that the service request signaling is not received within the first preset time, restarting the periodic paging timer, and determining that the periodic paging timer reaches the The third preset time is that the paging message is sent to the UE corresponding to the GUTI.
The method for restoring a network according to claim 1 or 2, wherein the instructing the UE to re-acquire the service comprises:

Sending, by the MME, service rejection signaling to the UE; or

The MME establishes an associated radio bearer according to the information corresponding to all the undeleted bearers that are stored, where the radio bearer is a data path between the UE and the network device for transmitting a data packet.
The method for recovering a network according to claim 3, wherein the service rejection signaling includes an implicitly separated cause value, and the implicitly separated cause value is used to indicate that the UE is re-registered. After the MME sends the service rejection signaling to the UE, the method further includes:

Receiving, by the MME, a registration request sent by the UE;

The MME sends signaling that the registration is successful to the UE.
The method for restoring a network according to claim 3, further comprising: after the MME establishes an associated radio bearer according to the information corresponding to all the undeleted bearers that are stored, the method further includes:

Receiving, by the MME, a request for re-establishing the bearer sent by the UE;

The MME sends signaling that the bearer is successfully established to the UE.
A method for restoring a network, the method comprising:

When the user equipment UE is in a state incapable of responding to the paging, the triggering tracking area update TAU timer is started;

After recovering to a state capable of responding to the paging, the UE determines whether the trigger TAU timer is greater than or equal to a preset time;

If the trigger TAU timer is greater than or equal to the preset time, the UE sends a TAU request to the mobility management entity MME;

Receiving, by the UE, the signaling sent by the MME, where the signaling is TAU reject signaling, or the signaling is TAU consent signaling;

The UE reacquires the service according to the signaling.
The method for restoring a network according to claim 6, wherein the signaling is TAU reject signaling, and the TAU reject signaling includes an implicitly separated cause value, and the implicitly separated cause value is used. Instructing the UE to re-register, the UE re-acquiring the service according to the signaling, including:

Sending, by the UE, a registration request to the MME according to the reason value of the implicit separation;

The UE receives signaling that the MME sends a registration success.
The method for restoring a network according to claim 6, wherein the signaling is TAU consent signaling, and the TAU consent signaling includes a bearer corresponding to an active state between the UE and the network device. The information, the UE reacquising the service according to the signaling, includes:

Decoding, by the UE, the information corresponding to the first bearer in the deactivated state according to the TAU consent signaling, where the first bearer is a logical path between the UE and the network device, where the first bearer corresponds The information is information that the MME deletes during the state that the UE is in a state incapable of responding to the paging;

Sending, by the UE, a request for re-establishing the first bearer to the MME;

The UE receives signaling that is successfully sent by the MME to establish the first bearer.
The method for restoring a network according to any one of claims 6-8, further comprising:

The UE determines that it is in a state incapable of responding to the paging when the network is lost.
A mobility management entity MME, the MME includes: a deleting unit, a storage unit, a processing unit, a sending unit, and a receiving unit;

The deleting unit is configured to: when it is determined that the paging message is sent to the user equipment UE at least once, and the response of the UE is not received in the first preset time after the paging message is sent Deleting the information corresponding to the bearer; the bearer is a logical path between the UE and the network device, and the time when there is no uplink and downlink data or signaling transmission on the bearer reaches a second preset time;

The storage unit is configured to store a globally unique temporary identifier GUTI corresponding to the UE;

The processing unit is configured to start a periodic paging timer corresponding to the UE;

The sending unit is configured to periodically send the paging message to the UE corresponding to the GUTI according to the periodic paging timer corresponding to the UE;

The receiving unit is configured to receive service request signaling sent by the UE;

The processing unit is further configured to: if it is determined that the service request signaling is received, instruct the UE to re-acquire the service.
The MME according to claim 10, wherein the sending unit is specifically configured to:

And sending the paging message to the UE corresponding to the GUTI when determining that the periodic paging timer reaches a third preset time;

If it is determined that the service request signaling is not received within the first preset time, restarting the periodic paging timer, and determining that the periodic paging timer reaches the third pre- When the time is set, the paging message is resent to the UE corresponding to the GUTI.
The MME according to claim 10 or 11, wherein the processing unit is specifically configured to:

Sending service rejection signaling to the UE; or,

Establishing an associated radio bearer according to the information corresponding to all the undeleted bearers that are stored, where the radio bearer is a data path between the UE and the network device for transmitting a data packet.
The MME according to claim 12, wherein the service rejection signaling includes an implicitly separated cause value, and the implicitly separated cause value is used to indicate that the UE is re-registered;

The receiving unit is further configured to receive a registration request sent by the UE;

The sending unit is further configured to send signaling that the registration is successful to the UE.
The MME according to claim 12, characterized in that

The receiving unit is further configured to receive a request sent by the UE to re-establish the bearer;

The sending unit is further configured to send, to the UE, signaling that the bearer is successfully established.
A user equipment (UE), the UE includes: a processing unit, a sending unit, and a receiving unit;

The processing unit is configured to start a trigger tracking area update TAU timer when the UE is in a state incapable of responding to the paging, and determine whether the trigger TAU timer is greater than or after recovering to a state capable of responding to the paging Equal to the preset time;

The sending unit is configured to send a TAU request to the mobility management entity MME if the trigger TAU timer is greater than or equal to the preset time;

The receiving unit is configured to receive signaling sent by the MME, where the signaling is TAU reject signaling, or the signaling is TAU consent signaling;

The processing unit is further configured to reacquire the service according to the signaling.
The UE according to claim 15, wherein the signaling is TAU reject signaling, the TAU reject signaling includes an implicitly separated cause value, and the implicitly separated cause value is used to indicate The UE re-registers, and the processing unit is specifically configured to:

Sending a registration request to the MME according to the reason value of the implicit separation;

Receiving signaling of successful registration sent by the MME.
The UE according to claim 15, wherein the signaling is TAU consent signaling, and the TAU consent signaling includes information corresponding to a bearer in an active state between the UE and a network device, where The processing unit is specifically used to:

Deleting the information corresponding to the first bearer in the deactivated state according to the TAU consent signaling, where the first bearer is a logical path between the UE and the network device, and the information corresponding to the first bearer is Decoding information that the MME deletes when the UE is in a state incapable of responding to the paging;

Sending, to the MME, a request to re-establish the first bearer;

Receiving signaling for establishing the first bearer sent by the MME.
The UE according to any one of claims 15-17, wherein the UE further comprises: a determining unit;

The determining unit is configured to determine that the UE is in a state incapable of responding to a paging when the UE loses network.
An apparatus comprising: at least one processor, and a memory; wherein

The memory is for storing a computer program such that the computer program is executed by the at least one processor to implement the method of restoring a network according to any one of claims 1-9.
A computer storage medium having stored thereon a computer program, wherein the program is executed by a processor to implement the method of restoring a network according to any one of claims 1-9.