CN118075831A

CN118075831A - Method and device for avoiding service failure

Info

Publication number: CN118075831A
Application number: CN202211468329.1A
Authority: CN
Inventors: 丁明
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2024-05-24
Also published as: WO2024108760A1

Abstract

The application provides a method and a device for avoiding service failure, which are applied to a terminal, wherein the method comprises the following steps: after the terminal is triggered to redirect or switch from the first network to the second network, the registration failure to the second network is judged, and the mobility registration is carried out to the first network, so that the first network perceives that the terminal is registered in the first network, the success rate of executing the service based on the first network by the terminal is improved, and the possibility of service failure is reduced.

Description

Method and device for avoiding service failure

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and apparatus for avoiding service failure.

Background

With the development of mobile communication technology, a terminal can perform wireless communication based on networks of various standards. Networks of multiple formats include, but are not limited to: 5G networks and 4G networks.

Although the terminal can perform wireless communication based on networks of various systems, there is a problem in that a call or a data service fails.

Disclosure of Invention

The application provides a method and a device for avoiding service failure, and aims to solve the problem of how to avoid service failure.

The first aspect of the present application provides a method for avoiding service failure, applied to a terminal, the method comprising: after the terminal is triggered to redirect or switch from the first network to the second network, the registration failure to the second network is judged, and the mobility registration is carried out to the first network, so that the first network perceives that the terminal is registered in the first network, the success rate of executing the service based on the first network by the terminal is improved, and the possibility of service failure is reduced.

In some implementations, before being triggered to redirect or switch from the first network to the second network, further comprising: registration is successful in the first network. And if the first network registration is successful, the service can be executed based on the first network, and on the basis, the mobility registration is carried out to the first network, so that the first network again perceives that the terminal is registered in the first network, the success rate of the terminal for executing the service based on the first network is improved, and the possibility of service failure is reduced.

In some implementations, determining that registration with the second network failed includes: based on the information of the cell of the second network carried by the redirection message, it is determined that the cell of the second network does not meet the condition of the terminal to initiate the redirection flow, the terminal does not initiate redirection to the second network, and registration is not initiated to the second network, so that registration is unsuccessful, and it is seen that the cell of the second network does not meet the condition of the terminal to initiate the redirection flow and registration failure can be accurately determined.

In some implementations, determining that registration with the second network failed includes: and judging that the cell of the second network indicated by the redirection message meets the condition of initiating redirection, initiating a redirection flow to the cell of the second network, and judging that the redirection flow fails. If the redirection flow fails, the terminal will not initiate registration to the second network, so the registration will not succeed, and it can be seen that the redirection flow fails to accurately determine the registration failure.

In some implementations, determining that registration with the second network failed includes: and judging that the cell of the second network indicated by the redirection message meets the condition of initiating redirection, initiating a redirection flow to the cell of the second network, initiating a registration flow to the cell of the second network after the redirection flow, and judging that the registration flow fails.

In some implementations, the terminal is triggered to redirect from the first network to the second network, including: and receiving a redirection message, wherein the redirection message carries information of a cell of the second network.

In some implementations, determining that registration with the second network failed includes: and based on the target cell of the second network indicated by the switching message, carrying out a random access procedure to the target cell, and judging that the random access procedure fails. The terminal cannot register the flow if the random access flow fails, so that the registration failure is judged to have higher accuracy by the random access flow failure.

In some implementations, determining that registration with the second network failed includes: and based on the target cell of the second network indicated by the switching message, carrying out a random access flow to the target cell, initiating a registration flow to the cell of the second network after the random access flow, and judging that the registration flow fails.

In some implementations, the terminal is triggered to switch from the first network to the second network, including: and receiving a measurement message, wherein the measurement message indicates to measure the cell of the second network, reports a measurement result of measuring the cell of the second network, and receives a switching message which carries information of a target cell selected based on the measurement result.

In some implementations, mobility registration with a first network includes: and initiating a tracking area update TAU flow to the equipment of the first network.

A second aspect of the present application provides a method for avoiding service failure, applied to a network device of a first network, the method comprising: after the terminal is triggered to be redirected or switched from the first network to the second network, the mobile registration message sent by the terminal is received, and the mobile registration message enables the first network to perceive that the terminal is registered in the first network, so that the first network can issue paging to the terminal under the condition that the terminal has downlink service, and the terminal is prevented from failing to execute the service.

The mobility registration message, before triggering the redirection or handover of the terminal from the first network to the second network, further comprises: and responding to the registration message sent by the terminal, and sending a registration success message to the terminal.

A third aspect of the present application provides an electronic apparatus comprising: the system comprises a memory and at least one processor, wherein the memory is used for storing an application program, and the at least one processor is used for executing the application program so as to realize the method for avoiding service failure provided by the first aspect of the application.

A fourth aspect of the present application provides a chip, wherein when the chip is deployed inside a terminal, the chip is configured to control the terminal to implement the method for avoiding service failure provided in the first aspect of the present application.

A fifth aspect of the present application provides a computer storage medium storing a computer program which, when executed, implements the method for avoiding service failure provided by the first aspect of the present application.

Drawings

FIG. 1a is an exemplary diagram of a handset residing on a 5G network;

FIG. 1b is an exemplary diagram of a handset performing a telephony service in a 4G network;

FIG. 1c is a flowchart illustrating a failure of a mobile phone to perform a call service;

FIG. 2 is a flow chart of a method for avoiding service failure according to an embodiment of the present application;

FIG. 3 is a flow chart of another method for avoiding service failure according to an embodiment of the present application;

FIG. 4 is a flow chart of another method for avoiding service failure according to an embodiment of the present application;

FIG. 5 is a flow chart of another method for avoiding service failure according to an embodiment of the present application;

fig. 6 is a diagram illustrating a hardware configuration of a terminal according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. The terminology used in the following examples is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include, for example, "one or more" such forms of expression, unless the context clearly indicates to the contrary. It should also be understood that in embodiments of the present application, "one or more" means one, two, or more than two; "and/or", describes an association relationship of the association object, indicating that three relationships may exist; for example, a and/or B may represent: a alone, a and B together, and B alone, wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

The plurality of the embodiments of the present application is greater than or equal to two. It should be noted that, in the description of the embodiments of the present application, the terms "first," "second," and the like are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance, or alternatively, for indicating or implying a sequential order.

In the following, in conjunction with fig. 1a to fig. 1c, a service failure of a terminal is illustrated by taking a terminal call called failure as an example:

in fig. 1a, the user is not making or receiving a call, in which case the handset typically resides in a cell (cell) of the 5G network. If the user wants to make or receive a call, the mobile phone is switched to the LTE network as shown in fig. 1 b.

However, the inventors found in the course of the study that after the call is ended, if the mobile phone is called as a called party of the call, the call may not be put through.

The reason why the call cannot be put through will be described in the following with reference to fig. 1c, the 4G network device shown in fig. 1c includes a radio network device (may also be referred to as an access network device) and a core network device of the 4G network, the 5G network device includes a radio network device and a core network device of the 5G network, and a certain step shown in fig. 1c may be a summary of a plurality of steps, and specific reference may be made to a communication protocol, which is not described herein.

Fig. 1c includes the following steps:

s101, the mobile phone is successfully registered in the 5G network.

It can be appreciated that the handset successfully registers in the 5G network through interaction with the 5G network device.

S102, the 5G network equipment responds to the call service and triggers an emergency step fallback (EMERGENCY PROCEDURES FALLBACK, EPS FB).

It can be understood that the mobile phone in the call service can be a calling party or a called party.

S103, the mobile phone is successfully registered in the 4G network.

It can be understood that the EPS FB triggers the mobile phone to register with the 4G network, and the mobile phone completes the registration process by interacting with the 4G network, which may or may not be successful in registration, where it is assumed that the registration is successful.

S104, the mobile phone executes the call service through the 4G network.

S105, the 4G network device sends a radio resource control (Radio Resource Control, RRC) Release (Release) message to the handset in response to the call ending.

The RRC RELEASE message carries information (e.g., frequency points) of cells in the 5G network. The RRC RELEASE message triggers the handset to perform a redirection procedure to the 5G network, in which the handset first determines RRC RELEASE whether the cell indicated by the 5G cell information carried by the message meets the S criteria. In the present embodiment, it is assumed that the determination result is not satisfied, i.e., S106.

S106, the mobile phone judges that the 5G cell does not meet the S criterion.

It can be understood that the mobile phone determines that the 5G cell does not meet the S criterion, which means that none of the 5G cells issued by the 4G network device meet the redirection condition, and therefore, the mobile phone does not perform the subsequent steps of redirection. The handset is still registered with the 4G network.

In this case, if the handset is called as a called party of a call, S107-S108 are performed according to the protocol.

And S107, the 4G network equipment responds to the called terminal and transmits paging to the terminal.

S108, the mobile phone performs call service based on the 4G network.

The inventor finds that the 4G network device has the possibility of not sending out the page in the process of testing and researching the actual network, that is, S107 may not be executed, in this case, S108 cannot be executed, that is, the called call of the mobile phone cannot be connected, and the call service fails.

It will be understood that the flow shown in fig. 1c is taken as an example of the called call service, and in addition, the alternative step of S107 is to respond to the downlink data service of the terminal, and the 4G device issues a page to the mobile phone, and the alternative step of S108 is to perform the data service based on the 4G network by the mobile phone. It can be seen that in addition to the possibility of failure of the called talk service, there is also a possibility of failure of the data service.

In order to solve the problem of service failure of mobile communication, the embodiment of the application provides a method for avoiding service failure, which is applied to the following scenes: the terminal is registered in the first network, the terminal is triggered to redirect or switch from the first network to the second network, and attempts to register with the second network.

Terminals include, but are not limited to: a mobile phone (mobile phone), a tablet (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a vehicle-mounted terminal device, a wireless terminal in unmanned (SELF DRIVING), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (SMART GRID), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (SMART CITY), a wireless terminal in smart home (smart home), a wearable terminal device, and the like. A terminal may also be referred to as a terminal device, user Equipment (UE), access terminal device, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, remote terminal device, mobile device, UE terminal device, wireless communication device, UE agent, UE apparatus, or the like. The terminal may also be a fixed terminal or a mobile terminal.

The first network and the second network are wireless communication networks with different standards. The first network includes, but is not limited to: second generation (2G) communication networks, third generation (3G) communication networks, long term evolution (long term evolution, LTE) networks (i.e., 4G networks), fifth generation (5G) communication networks, LTE and 5G hybrid architecture networks, 5G new wireless (5G New Radio,5G NR) networks, new communication networks emerging in future communication developments, and the like. In connection with the flow shown in fig. 1c, in the following embodiments of the application, one example of the first network is a 4G network.

The second network includes, but is not limited to: second generation (2G) communication networks, third generation (3G) communication networks, LTE) networks, fifth generation (5G) communication networks, LTE and 5G hybrid architecture networks, 5G new wireless (5G New Radio,5G NR) networks, new communication networks that emerge in future communication developments, and the like. In connection with the flow shown in fig. 1c, in the following embodiments of the application, one example of the second network is a 5G network.

The steps shown in S102-S103 in fig. 1c, that is, triggering the terminal to register in the first network through the EPS FB, is a specific implementation manner, and may also be implemented to successfully register the terminal in the first network based on other implementation manners, for example, the terminal is started and resides and registers successfully in the first network.

S105 shown in fig. 1c is an example of a 4G network triggering redirection, not by way of limitation, and another example of a redirection triggering manner is that the terminal measures quality degradation of the 4G network (i.e. a redirection based on the measurement).

The scenario in which the terminal is triggered to switch from the first network to the second network will be described in the following embodiment (see fig. 4).

Fig. 2 is a flowchart of a method for avoiding service failure according to an embodiment of the present application, and in the same scenario as the flowchart shown in fig. 1c, for convenience of understanding, examples of steps (S201-S205) related to the scenario are also described together in the embodiment of the present application.

The following steps are included in fig. 2:

S201, the terminal is successfully registered in the 5G network. See S101.

S202, the 5G network equipment responds to the call service and triggers EPS FB.

S203, the terminal is successfully registered in the 4G network. See S103.

S204, the terminal responds to the called party in the 4G network and executes the call service.

And S205, the 4G network equipment responds to the call end and sends a radio resource control RRC RELEASE message to the terminal.

The RRC RELEASE message carries information (e.g., frequency points) of cells in the 5G network. The RRC RELEASE message triggers the terminal to perform a procedure of redirecting to the 5G network, in which the terminal first determines RRC RELEASE whether the cell indicated by the information of the 5G cell carried by the message meets the S criterion. In the present embodiment, it is assumed that the determination result is not satisfied, i.e., S206.

S206, the terminal judges that the 5G cell does not meet the S criterion.

It can be understood that the terminal determines that the 5G cell does not meet the S criterion, which means that none of the 5G cells issued by the 4G network device meet the redirection condition, so the terminal does not perform the subsequent step of redirection, and cannot register in the 5G network if the redirection to the 5G network cannot be completed, so S206 can be understood as a specific manner of determining that the registration to the 5G network fails. The handset is still registered with the 4G network.

S207, the terminal sends a Tracking Area Update (TAU) request message to the 4G network device.

And S208, the 4G network equipment sends a TAU acceptance message to the terminal.

S209, the terminal sends a TAU completion message to the 4G network equipment.

As can be seen from S207-S209, the terminal initiates a TAU procedure to the 4G network, and completes a TAU procedure with the 4G network once, and because the TAU procedure functions as mobility registration to the network, the 4G network can sense that the terminal is registered in the 4G network again.

Assuming that after S209 the terminal is called, the following steps are triggered:

And S210, the 4G network responds to the called terminal and sends a page to the terminal.

One of the paging functions is to trigger the establishment of an RRC connection between the terminal and the network, and the terminal can perform a service based on the network only when the terminal and the network are in a RRC connected state. The purpose of sending the paging to the terminal can be seen to lay a foundation for the execution of the follow-up service.

S211, the terminal executes the call service based on the 4G network.

As can be seen from the flow shown in fig. 2, after the terminal determines that none of the 5G cells issued by the 4G network meets the redirection condition, the terminal initiates a TAU flow to the 4G network, so that the 4G network again perceives that the terminal is registered in the 4G network, thereby increasing the possibility that the 4G network responds to the terminal to issue paging, and reducing the possibility that the called service fails.

Fig. 3 is a flowchart of another method for avoiding service failure according to an embodiment of the present application, which is different from the flowchart shown in fig. 2 mainly in an implementation manner of determining registration failure with a 5G network.

The following steps are included in fig. 3:

s301, the terminal is successfully registered in the 4G network.

In this embodiment, the triggering mode of successful registration of the terminal in the 4G network is not limited (S202 is taken as an example in fig. 2).

In fig. 2, the 4G network triggers the terminal to initiate a redirection in response to the call ending, and in this embodiment, the terminal initiates a redirection based on measurement. In some implementations, the terminal periodically measures the signal quality of the 4G network, and in case of signal degradation of the 4G network, initiates redirection to the 5G network, where the initiation redirection first measures whether the 5G cell satisfies the S criterion, in this embodiment, S302 is taken as an example.

S302, the terminal judges that the 5G cell meets the S criterion.

In some implementations, the frequency points of the 5G cell are pre-configured in the terminal. In other implementations, after the terminal determines that the signal of the 4G network is degraded, the frequency point of the 5G cell is obtained from the 4G network.

It may be appreciated that in the case of determining whether the plurality of 5G cells satisfy the S criterion, at least one 5G cell satisfies the S criterion, it is determined that the 5G cell satisfies the S criterion.

S303, the terminal initiates redirection to the 5G network equipment.

The redirection may or may not succeed, and after the redirection is successful, the terminal may initiate registration with the 5G network.

S304, the terminal judges that registration fails.

It will be appreciated that the registration failure may be a redirection procedure failure or a registration procedure failure.

In some implementations, if the registration success message sent by the 5G network is not received within a preset duration after the terminal initiates redirection to the 5G network, the registration failure is determined.

It will be appreciated that registration failure means that the terminal cannot perform a service through the 5G network. In connection with the scenario shown in fig. 3, the terminal can only perform a service through the 4G network. The terminal performs S305 to increase the possibility of successful execution of the service.

S305, the terminal initiates a TAU flow to the 4G network equipment.

The implementation steps of the TAU procedure can be seen in S207-S209. It can be appreciated that the terminal initiates the TAU procedure by sending a TAU request message to the 4G network device.

Note that S304 and S305 may be replaced with: and under the condition that the terminal fails to register with the 5G network, the terminal initiates a TAU flow to the 4G network equipment.

In some actual network scenarios, when the UE redirects to the NR, a problem scenario of a terminal registration failure to the 5G network may occur, for example, because the S criterion fails, the UE finds that the frequency point does not meet the S criterion after detecting the frequency point in the RRC REL message, so that a called failure problem may occur. In some embodiments, after identifying such a problem scenario, the UE actively initiates a TAU to the LTE network device once, so that the terminal can complete registration on LTE after redirection to NR fails, thereby avoiding the problem of called non-communication compatibility in the existing network.

S306, the terminal executes the service through the 4G network.

As described above, when the terminal is called, the 4G network issues a page to the terminal to trigger the terminal to execute a call service based on the 4G network. When the 4G network receives data sent to the terminal, the 4G network sends a page to the terminal so as to trigger the terminal to execute data service based on the 4G network.

The flow shown in fig. 3 judges whether the registration is successful or not based on whether the registration success message is received, and under the condition that the registration is unsuccessful, the terminal initiates TAU (i.e. mobility registration) to the 4G network, so that the 4G network perceives that the terminal is registered in the 4G network, thereby improving that the 4G network can send paging to the terminal when the terminal has downlink service, and further reducing the possibility of service failure of the terminal.

As previously described, the 4G network triggers the terminal to switch to the 5G network in some scenarios. The following will focus on the flow of avoiding service failure in the handover scenario.

Fig. 4 is a schematic diagram of another method for avoiding service failure according to an embodiment of the present application, which is mainly described as a flow in a handover scenario, and fig. 4 includes the following steps:

s401, the terminal is successfully registered in the 4G network.

In this embodiment, the triggering step (i.e., the preamble procedure) for the terminal to register in the 4G network is not limited.

In this embodiment, taking a scenario in which the 4G network indication terminal switches to the 5G network as an example, a trigger condition for triggering the 4G network indication terminal to switch is not limited. The 4G network instructs the terminal to switch to the 5G network through S402-S405.

And S402, the 4G network equipment sends a message for measuring the 5G cell to the terminal.

In some implementations, the message sent by the 4G network device carries information, such as frequency points, of the 5G cell to be measured.

S403, the terminal measures the 5G cell to obtain a measurement result.

In some implementations, the terminal measures 5G cells to be measured issued by the 4G network device, in other implementations, the terminal measures 5G cells of locally stored frequency points.

S404, the terminal sends the measurement result to the 4G network equipment.

S405, the 4G network device transmits information of the target cell obtained based on the measurement result to the terminal.

The cell where the terminal is currently located is called a source cell, and the target cell can be understood as a cell where the terminal is located after the handover is successfully completed, which corresponds to the source cell. That is, the target cell may be understood as a 5G cell to which the terminal is to be handed over from the source cell.

In some implementations, the quality of the 5G cell is confirmed based on the measurement result, and the cell with better quality is taken as the target cell.

S406, the terminal initiates switching to the target cell.

S407, the terminal judges that the random access target cell fails.

The requirement for successful handover is that the terminal is successful in accessing the target cell randomly, so it can be understood that the terminal fails to access the target cell randomly and can not register successfully in the target cell. The terminal is still registered with the 4G network.

It can be appreciated that, in one implementation of determining that the random access target cell fails as determining that registration in the target cell fails, an alternative step of S407 is: the terminal determines that the registration procedure performed in the target cell fails. It can be understood that after the random access procedure is successful, the terminal initiates a registration procedure to the target cell, and if the registration procedure fails, if the terminal does not receive a message of successful registration within a preset duration, the terminal determines that the registration fails.

And S408, the terminal initiates mobility registration to the 4G network equipment.

For the 4G network, the implementation manner of mobility registration is TUA flow, that is, the terminal performs registration with the 4G network through TAU flow.

S409, 4G network equipment responds to the terminal called or receives the downlink data of the terminal, and issues paging.

S410, the terminal executes the service based on the 4G network.

As can be seen from the flow shown in fig. 4, in the scenario of handover from the first network (e.g. 4G network) to the second network (e.g. 5G network), the terminal fails to register in the 5G network through the random access target cell, so that mobility registration is initiated to the 4G network, so that the 4G network senses that the terminal registers in the 4G network again, and the problem that the 4G network does not issue a page to the terminal under the condition that the terminal has downlink service is avoided, thereby avoiding service failure is avoided.

Fig. 5 is a schematic diagram of another method for avoiding service failure according to an embodiment of the present application, which is different from the foregoing embodiment in that: application to a scenario of redirecting or switching from a 5G network to a 4G network.

The following steps are included in fig. 5:

s501, the terminal is successfully registered in the 5G network.

The terminal can register in the 5G network in various scenes, for example, the mobile phone is started to reside in the 5G network and is successfully registered in the 5G network. The scenario in which the terminal registers in the 5G network is not limited here.

S502, the 5G network device sends a message to the terminal to redirect or register to the 4G network.

The scenario of triggering the 5G network device to send a message to the terminal that is redirected or registered to the 4G network is not limited here. An example of a trigger scenario is where the 5G network does not support voice traffic and the terminal initiates a caller or a callee, and where the message redirected or registered to the 4G network is an EPS FB message. It will be appreciated that the message redirected or registered to the 4G network carries information (e.g., frequency points) of the cells of the 4G network.

S503, the terminal judges that registration to the 4G network fails.

For the redirection scenario, in some implementations, the terminal determines that the 4G cell does not meet the S criterion, and does not initiate redirection to the cell of the 4G network. In other implementations, the terminal determines that the 4G cell satisfies the S criterion, initiates redirection to the cell of the 4G network, and after the redirection is successful, there is a possibility that the registration procedure is initiated to the cell of the 4G network. Either the redirection failure or the registration flow failure is determined to be a registration failure.

For the switching scenario, in some implementations, the terminal performs a random access procedure to the cell of the 4G network based on the information of the cell of the 4G network carried by the message switched to the 4G network, and if the random access is unsuccessful, the terminal determines that registration to the 4G cell fails. In other implementations, the random access 4G network is successful, but the registration procedure with the 4G network fails, and the terminal determines that registration with the 4G cell fails.

After the terminal fails to register with the 4G network, the terminal is still registered in the 5G network.

And S504, the terminal performs mobility registration to the 5G network equipment.

The role of mobility registration is to register in a 5G network. It will be appreciated that in case the terminal has successfully registered with the 5G network, the mobility registration enables re-registration purposes so that the 5G network is again aware of the registration of the terminal in the 5G network.

And S505, the 5G network equipment responds to the called terminal or receives the downlink data of the terminal and transmits paging to the terminal.

S506, the terminal executes the service based on the 5G network.

As can be seen by combining the flows shown in fig. 5 and fig. 2 to fig. 4, the method for avoiding service failure provided by the embodiment of the present application can register again with the currently registered network, no matter whether the terminal is registered in the 4G network or the 5G network, under the condition of registering failure with other networks, so that the currently registered network can issue a page in time at the terminal, and normal execution of the service is ensured.

Fig. 6 is a diagram showing a structural example of the terminal according to the above embodiment. The terminal 300 may include a processor 310, an external memory interface 320, an internal memory 321, a display 330, a camera 340, an antenna 1, an antenna 2, a mobile communication module 350, a wireless communication module 360, and the like.

It will be appreciated that the structure illustrated in this embodiment does not constitute a specific limitation on the terminal. In other embodiments, the terminal may include more or fewer components than shown, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The processor 310 may include one or more processing units, such as: the processor 310 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (IMAGE SIGNAL processor, ISP), a controller, a video codec, a digital signal processor (DIGITAL SIGNAL processor, DSP), a baseband processor, and/or a neural-Network Processor (NPU), etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors.

It should be understood that the interfacing relationship between the modules illustrated in the present embodiment is only illustrative, and does not limit the structure of the terminal 300. In other embodiments of the present application, the terminal 300 may also use different interfacing manners in the above embodiments, or a combination of multiple interfacing manners.

The external memory interface 320 may be used to connect an external memory card to realize expansion of the memory capability of the terminal. The external memory card communicates with the processor 310 through an external memory interface 320 to implement data storage functions.

The internal memory 321 may be used to store computer executable program code that includes instructions. The processor 310 executes various functional applications of the terminal 300 and data processing by executing instructions stored in the internal memory 321. The internal memory 321 may include a storage program area and a storage data area. The storage program area may store an application program (such as a sound playing function, an image playing function, etc.) required for at least one function of the operating system, etc. The storage data area may store data (e.g., audio data, phonebook, etc.) created during use of the terminal, etc. In addition, the internal memory 321 may include a high-speed random access memory, and may also include a nonvolatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (universal flash storage, UFS), and the like. The processor 310 performs various functional applications of the terminal and data processing by executing instructions stored in the internal memory 321 and/or instructions stored in a memory provided in the processor.

The terminal implements display functions through the GPU, the display screen 330, and the application processor, etc. The GPU is a microprocessor for image processing, and is connected to the display 330 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. Processor 310 may include one or more GPUs that execute program instructions to generate or change display information.

The display screen 330 is used to display images, videos, and the like. The display screen 330 includes a display panel. In some embodiments, the terminal may include 1 or N displays 330, N being a positive integer greater than 1.

The terminal may implement a photographing function through an ISP, a camera 340, a video codec, a GPU, a display screen 330, an application processor, and the like.

The wireless communication function of the terminal may be implemented by the antenna 1, the antenna 2, the mobile communication module 350, the wireless communication module 360, a modem processor, a baseband processor, and the like.

The antennas 1 and 2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in the terminal may be used to cover a single or multiple communication bands. Different antennas may also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may be multiplexed into a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 350 may provide a solution for wireless communication including 2G/3G/4G/5G or the like applied on the terminal. The mobile communication module 350 may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA), or the like. The mobile communication module 350 may receive electromagnetic waves from the antenna 1, perform processes such as filtering, amplifying, and the like on the received electromagnetic waves, and transmit the processed electromagnetic waves to the modem processor for demodulation. The mobile communication module 350 may amplify the signal modulated by the modem processor, and convert the signal into electromagnetic waves through the antenna 1 to radiate the electromagnetic waves. In some embodiments, at least some of the functional modules of the mobile communication module 350 may be disposed in the processor 310. In some embodiments, at least some of the functional modules of the mobile communication module 350 may be provided in the same device as at least some of the modules of the processor 310. In some embodiments, the terminal initiates or receives a call request through the mobile communication module 350 and the antenna 1.

The wireless communication module 360 may provide solutions for wireless communication including wireless local area network (wireless local area networks, WLAN) (e.g., wireless fidelity (WIRELESS FIDELITY, wi-Fi) network), bluetooth (BT), global navigation satellite system (global navigation SATELLITE SYSTEM, GNSS), frequency modulation (frequency modulation, FM), near field communication (NEAR FIELD communication, NFC), infrared (IR), etc. applied on the terminal. The wireless communication module 360 may be one or more devices that integrate at least one communication processing module. The wireless communication module 360 receives electromagnetic waves via the antenna 3, modulates the electromagnetic wave signals, filters the electromagnetic wave signals, and transmits the processed signals to the processor 310. The wireless communication module 360 may also receive a signal to be transmitted from the processor 310, frequency modulate it, amplify it, and convert it to electromagnetic waves for radiation via the antenna 2.

The terminal 300 may implement audio functions through an audio module 370, a speaker 370A, a receiver 370B, a microphone 370C, an earphone interface 370D, an application processor, and the like.

Claims

1. A method for avoiding service failure, applied to a terminal, the method comprising:

after the terminal is triggered to be redirected or switched from a first network to a second network, judging that registration fails to the second network;

And carrying out mobility registration on the first network.

2. The method of claim 1, further comprising, prior to the triggered redirection or handoff from the first network to the second network:

Registration is successful with the first network.

3. The method according to claim 1 or 2, wherein said determining that registration with said second network failed comprises:

And based on the information of the cell of the second network carried by the redirection message, judging that the cell of the second network does not meet the condition of the terminal for initiating a redirection flow.

4. The method according to claim 1 or 2, wherein said determining that registration with said second network failed comprises:

Determining that a cell of the second network indicated by the redirection message meets a condition for initiating redirection;

Initiating a redirection procedure to a cell of the second network;

And judging that the redirection flow fails.

5. The method according to claim 1 or 2, wherein said determining that registration with said second network failed comprises:

Initiating a redirection procedure to a cell of the second network;

after the redirection procedure, initiating a registration procedure to a cell of the second network;

And judging that the registration flow fails.

6. The method according to any of claims 2-5, wherein the terminal is triggered to redirect from a first network to a second network, comprising:

and receiving a redirection message, wherein the redirection message carries information of a cell of the second network.

7. The method according to claim 1 or 2, wherein said determining that registration with said second network failed comprises:

based on the target cell of the second network indicated by the handover message, performing a random access procedure to the target cell;

and judging that the random access flow fails.

8. The method according to claim 1 or 2, wherein said determining that registration with said second network failed comprises:

after the random access procedure, initiating a registration procedure to a cell of the second network;

And judging that the registration flow fails.

9. A method according to claim 7 or 8, wherein the terminal is triggered to switch from the first network to the second network, comprising:

receiving a measurement message, the measurement message indicating measurement of a cell of the second network;

Reporting a measurement result of measuring the cell of the second network;

And receiving the switching message, wherein the switching message carries information of the target cell selected based on the measurement result.

10. The method according to any of claims 1-9, wherein said mobility registration with the first network comprises:

And initiating a tracking area updating TAU process to the equipment of the first network.

11. A method for avoiding traffic failure, applied to a network device of a first network, the method comprising:

And after the terminal is triggered to be redirected or switched from the first network to the second network, receiving a mobility registration message sent by the terminal.

12. The method of claim 11, further comprising, prior to the redirecting or switching of the trigger terminal from the first network to the second network:

and responding to the registration message sent by the terminal, and sending a registration success message to the terminal.

13. An electronic device, comprising:

A memory and at least one processor; the memory is configured to store an application program, and the at least one processor is configured to execute the application program to implement the method for avoiding traffic failure according to any one of claims 1-12.

14. A chip for controlling a terminal to implement the method of any of claims 1-12 when the chip is deployed inside the terminal.