CN115696643A

CN115696643A - Recovery method and device for protocol data unit session service

Info

Publication number: CN115696643A
Application number: CN202211109089.6A
Authority: CN
Inventors: 张轲
Original assignee: China Telecom Corp Ltd
Current assignee: China Telecom Corp Ltd
Priority date: 2022-09-13
Filing date: 2022-09-13
Publication date: 2023-02-03

Abstract

The embodiment of the invention provides a method and a device for recovering a protocol data unit session service, which receive service initiation request information initiated by user terminal equipment and aiming at a voice service when the user terminal equipment carries out the protocol data unit session service based on a fifth generation mobile information network; the voice service is a voice service which is not supported by the new air interface; the voice service has corresponding context information; based on the service initiation request information, executing the evolution grouping system fallback to enable the user terminal equipment to carry out voice service based on the fourth generation mobile information network, and reserving context information through a session management function module; the protocol data unit session service aiming at the user terminal equipment is recovered through the context information, so that the condition that PDUSession needs to be reestablished aiming at the UE when the UE initiates the FastRedunn process and returns to the 5G network is avoided, the delay of the FastRedunn process is further reduced, and the efficiency aiming at the FastRedunn process is improved.

Description

Recovery method and device for protocol data unit session service

Technical Field

The present invention relates to the field of recovery techniques for a protocol data unit session service, and in particular, to a recovery method for a protocol data unit session service, a recovery apparatus for a protocol data unit session service, an electronic device, and a computer-readable storage medium.

Background

The fifth Generation Mobile Communication Technology (5 th Generation Mobile Communication Technology, abbreviated as 5G) is a new Generation broadband Mobile Communication Technology with high speed, low latency and large connection features, and the 5G Communication facility is a network infrastructure for implementing man-machine-physical interconnection. The 4G communication technology is a fourth generation mobile communication technology, which is a better improvement on the third generation mobile communication technology, 3G technology, and it is a greater advantage than the 3G communication technology, and it combines the wireless local area network technology and the 3G communication technology well, so that the transmission speed of the image is faster, and the quality of the transmitted image and the image look clearer.

The design of the 5GNR (New Radio, new air interface) voice scheme extends the way of carrying voice service through the IP network in 4G LTE (Long Term Evolution), and carries voice service through the 5G network (wireless network + core network) and IMS (IP Multimedia Subsystem ) system, which is called VoNR. Similarly, considering that the 5G networks are deployed in different stages and have different deployment scales, while the 4G networks are already widely deployed and may exist in the future for a long time, and the requirement for voice service continuity guarantee, a Fallback scheme is also necessary, so there are two schemes, namely EPS Fallback and VoNR, under the 5G SA networking. Most terminals do not support VONR for the time being after the present deployment of VONR technology. When the terminal which does not support the VONR initiates the voice service, the terminal still needs to fall back to the LTE network by executing the EPS Fallback flow.

For example, when the 5GC is in an Active state, that is, when the UE has data Service, if voice Service is initiated, the 5G base station triggers an EPS Fallback procedure, and the UE returns to the 4G network, but the PDU Session and QOS (Quality of Service) of the 5GC are released before, and need to be re-established, which may affect the delay and the communication rate, and especially for some delay-sensitive services, poor user experience may be caused by delay.

Disclosure of Invention

Embodiments of the present invention provide a recovery method, apparatus, electronic device, and computer-readable storage medium for a protocol data unit session service, so as to solve a problem how to reduce a delay generated in a Fast Return flow.

The embodiment of the invention discloses a recovery method for a protocol data unit session service, which is applied to base station equipment or core network equipment, wherein the base station equipment or the core network equipment comprises an accessed session management function module, and the base station equipment or the core network equipment is provided with corresponding user terminal equipment, and the method can comprise the following steps:

when the user terminal equipment carries out protocol data unit session service based on the fifth generation mobile information network, receiving service initiation request information which is initiated by the user terminal equipment and aims at voice service; the voice service is a voice service which is not supported by a new air interface; the voice service has corresponding context information;

performing an evolved packet system fallback based on the service initiation request information so that the user terminal device performs a voice service based on a fourth generation mobile information network, and retaining the context information through the session management function module;

and recovering the protocol data unit session service aiming at the user terminal equipment through the context information.

Optionally, the visited session management function module is configured with a timer, and the step of recovering the pdu session service for the ue through the context information may include:

judging whether the service duration aiming at the voice service exceeds a preset threshold value through the timer;

if not, when the voice service is finished, restoring the protocol data unit session service aiming at the user terminal equipment through the context information.

Optionally, the method may further include:

and if the service duration aiming at the voice service exceeds a preset threshold value, deleting the context information.

Optionally, the method may further include:

and when the voice service is finished and the service duration aiming at the voice service exceeds a preset threshold value, reestablishing a protocol data unit session service aiming at the user terminal equipment so that the user terminal equipment carries out the protocol data unit session service based on the fifth generation mobile information network.

Optionally, before the step of determining, by the timer, whether the service duration for the voice service exceeds a predetermined threshold, the method may further include:

acquiring an instant load parameter of the base station equipment or the core network equipment;

and setting a preset threshold value of the service duration aiming at the voice service according to the instant load parameter.

The embodiment of the invention also discloses a recovery device for the session service of the PDU, the device is applied to a base station device or a core network device, the base station device or the core network device comprises an accessed session management function module, the base station device or the core network device has a corresponding user terminal device, and the device can comprise:

a request information receiving module, configured to receive service initiation request information for a voice service, where the service initiation request information is initiated by the user terminal device when the user terminal device performs a protocol data unit session service based on the fifth-generation mobile information network; the voice service is a voice service which is not supported by a new air interface; the voice service has corresponding context information;

a request information execution module, configured to execute an evolved packet system fallback based on the service initiation request information, so that the ue performs a voice service based on a fourth-generation mobile information network, and retains the context information through the session management function module;

and the session service recovery module is used for recovering the protocol data unit session service aiming at the user terminal equipment through the context information.

Optionally, the visited session management function module is configured with a timer, and the session service recovery module may include:

the service duration judging submodule judges whether the service duration aiming at the voice service exceeds a preset threshold value through the timer; if not, calling a session service recovery submodule;

and the session service recovery submodule is used for recovering the protocol data unit session service aiming at the user terminal equipment through the context information when the voice service is finished.

Optionally, the method may further include:

and the context information deleting submodule is used for deleting the context information when the service duration aiming at the voice service exceeds a preset threshold value.

Optionally, the method may further include:

and the session service reconstruction submodule is used for reconstructing the protocol data unit session service aiming at the user terminal equipment when the voice service is finished and the service duration aiming at the voice service exceeds a preset threshold value so as to enable the user terminal equipment to carry out the protocol data unit session service based on the fifth generation mobile information network.

Optionally, before the step of determining, by the timer, whether the service duration for the voice service exceeds a predetermined threshold, the apparatus may further include:

a load parameter obtaining submodule, configured to obtain an instant load parameter of the base station device or the core network device;

and the preset threshold setting submodule sets a preset threshold aiming at the service duration of the voice service through the instant load parameter.

The embodiment of the invention also discloses electronic equipment which comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory finish mutual communication through the communication bus;

the memory is used for storing a computer program;

the processor is configured to implement the method according to the embodiment of the present invention when executing the program stored in the memory.

Also disclosed is a computer-readable storage medium having instructions stored thereon, which, when executed by one or more processors, cause the processors to perform a method according to an embodiment of the invention.

The embodiment of the invention has the following advantages:

in the embodiment of the invention, when the user terminal equipment carries out the protocol data unit session service based on the fifth generation mobile information network, the service initiation request information aiming at the voice service initiated by the user terminal equipment is received; the voice service is a voice service which is not supported by the new air interface; the voice service has corresponding context information; based on the service initiation request information, executing the evolution grouping system fall back so as to enable the user terminal equipment to carry out voice service based on the fourth generation mobile information network, and reserving context information through a session management function module; the protocol data unit Session service aiming at the user terminal equipment is recovered through the context information, so that the situation that PDU Session needs to be reestablished aiming at the UE when the UE initiates a Fast Return flow to Return to a 5G network is avoided, the delay of the Fast Return flow is reduced, and the efficiency aiming at the Fast Return flow is improved.

Drawings

FIG. 1 is a schematic flow chart of the steps of the prior art for EPS Fallback;

fig. 2 is a flowchart illustrating steps of a recovery method for a pdu session service according to an embodiment of the present invention;

fig. 3 is a block diagram of a recovery apparatus for a pdu session service provided in an embodiment of the present invention;

fig. 4 is a block diagram of a hardware structure of an electronic device provided in each embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

In order to better understand the embodiments of the present invention, some technical terms related to the embodiments of the present invention are explained below.

UE user terminal equipment

E-UTRAN:4G wireless access network

NG-RAN:5G wireless access network

AMF access and mobility management function module

MME: mobility management entity module

SGW: service gateway

Session management function module for V-SMF access

V-UPF user plane function module for access

PGW-C + SMF: entity for co-locating control plane of PDN gateway of 4G network and session management function of 5G network

PGW-U + SMF: entity for combining user plane of PDN gateway of 4G network and session management function of 5G network

PDU Session: protocol Data UnitSession, protocol Data Unit Session service

PDU Session Release: protocol data unit session service release

And QOS: quality of service

VoNR: the IMS network-based 5G NR voice solution is structured on a 5G NR network and is based on an IMS server end-to-end voice scheme under the all-IP condition. VoNR can implement concurrency of voice service and data service by deploying IMS, all services are carried over 5G network, but voice service requires IMS for service control.

EPS Fallback: when UE initiates or receives voice call in 5G NR, the UE falls back to 4G network in a redirection or switching mode, voice service is provided by VoLTE, and after voice call is finished, the UE returns to 5G network.

Fast Return: and returning to the 5G network for the quick return flow of data transmission when the voice service of the 4G network is finished.

In practical applications, the EPS Fallback basic flow includes that for a User Equipment (UE), no matter what service he wants to initiate, the UE needs to go through the processes of network registration, service initiation, resource release, and so on, as well as the voice service. For a 5G UE, if he wants to initiate a voice service on a 5G network, it needs to go through the processes of 5G network Registration (5 GC Registration), IMS system Registration (IMS Register), service initiation, resource allocation, resource release, etc.

Referring to fig. 1, which is a schematic diagram illustrating a procedure flow of an EPS Fallback in the prior art, when a 5GC of a user equipment UE is in an Active state, that is, when the UE has a data service, if a voice service is initiated, a 5G base station triggers an EPS Fallback flow, an MME sends a Relocation Complete message to an AMF, the AMF notifies a V-SMF to release a PDU Session, at this time, the PDU Session and QOS of the UE at the 5GC are released before, and the data service falls back to an LTE network; after the voice service is finished, the UE will initiate a Fast Return to the 5G network, but the PDU Session and QOS in the 5GC have been released before and need to be re-established, which will affect the delay and the communication rate, especially for some delay sensitive services, will cause poor user experience due to delay.

Referring to fig. 2, a flowchart illustrating steps of a recovery method for a protocol data unit session service provided in an embodiment of the present invention is shown, which may specifically include the following steps:

step 201, when the user terminal equipment performs a protocol data unit session service based on the fifth generation mobile information network, receiving service initiation request information for a voice service initiated by the user terminal equipment; the voice service is a voice service which is not supported by a new air interface; the voice service has corresponding context information;

step 202, performing an evolved packet system fallback based on the service initiation request information, so that the user equipment performs a voice service based on a fourth generation mobile information network, and retains the context information through the session management function module;

step 203, recovering the protocol data unit session service for the user terminal equipment through the context information.

The embodiment of the invention can be applied to base station equipment or core network equipment, the base station equipment or the core network equipment can comprise an accessed session management function module V-SMF, the base station equipment or the core network equipment is provided with corresponding user terminal equipment UE, and the UE can perform data interaction with a base station based on a 4G or 5G network.

In a specific implementation, the embodiment of the present invention may receive a service initiation request message for a voice service initiated by a user terminal device when the user terminal device performs a protocol data unit session service based on a fifth generation mobile information network, where specifically, the voice service is a voice service unsupported by a new air interface and may have corresponding context information; after receiving the service initiation request information for the voice service initiated by the user terminal device, the base station device or the core network device may perform an evolved packet system fallback based on the service initiation request information, so that the user terminal device performs the voice service based on the fourth-generation mobile information network.

Exemplarily, the embodiment of the present invention may receive service initiation request information for a voice service that does not support VoNR and is initiated by the UE when the UE performs PDU Session in Active state in a 5GC (5G core network), and then based on the service initiation request information, the base station device triggers an EPS Fallback and falls back to the LTE network, and the data service also falls back together.

In practical application, the AMF sends a message of 'Nsmf _ PDScess _ Release SM Context' to the V-SMF, so that the V-SMF executes PDU Session Release, and when the UE initiates a Fast Return process to Return to a 5G network, the PDU Session needs to be re-established for the UE, and the process can affect the delay and the communication rate.

Therefore, the embodiment of the present invention may retain the context information through the session management function module.

Illustratively, the AMF may be caused to send "Nsmf _ PDScession _ Handup SM Context" to the V-SMF, thereby causing the V-SMF to suspend PDU Session to retain Context information for the UE.

In practical applications, the context information of the embodiment of the present invention may include: number, IMSI (International Mobile subscriber Identity), IMEI (International Mobile Equipment Identity)), PDU session ID, uplink and downlink rate, charging ID, roaming state information, IP information of UE, PCF information, qos information, tunnel information, destination address, SMF identifier, slice information (if supported), default DRB information (Data Radio Bearer), data network name, AMF information, user location information, session management information, UPFID, online charging identifier, offline charging identifier, and other related information. Among these information, the IP, PCF information, qos information, tunnel information, SMF ID, AMF information, and UPF (user port Function) ID of the UE are dedicated information temporarily allocated by the 5G core network to the UE, and serve the PDU session.

The embodiment of the invention can recover the protocol data unit Session service aiming at the user terminal equipment through the context information, illustratively, the embodiment of the invention can activate PDU Session based on the context information through SMF, so as to avoid re-establishing PDU Session aiming at the UE when the UE initiates a Fast Return flow to a 5G network, thereby reducing the delay of the Fast Return flow.

In the embodiment of the invention, when the user terminal equipment carries out the protocol data unit session service based on the fifth generation mobile information network, the service initiation request information aiming at the voice service initiated by the user terminal equipment is received; the voice service is a voice service which is not supported by the new air interface; the voice service has corresponding context information; based on the service initiation request information, executing the evolution grouping system fallback to enable the user terminal equipment to carry out voice service based on the fourth generation mobile information network, and reserving context information through a session management function module; the protocol data unit Session service aiming at the user terminal equipment is recovered through the context information, so that the situation that PDU Session needs to be reestablished aiming at the UE when the UE initiates a Fast Return flow to Return to a 5G network is avoided, the delay of the Fast Return flow is reduced, and the efficiency aiming at the Fast Return flow is improved.

On the basis of the above-described embodiment, a modified embodiment of the above-described embodiment is proposed, and it is to be noted here that, in order to make the description brief, only the differences from the above-described embodiment are described in the modified embodiment.

In an optional embodiment of the present invention, the visited session management function module is configured with a timer, and the step of recovering the pdu session service for the ue through the context information includes:

judging whether the service duration aiming at the voice service exceeds a preset threshold value or not through the timer;

In the embodiment of the present invention, the visited session management function module V-SMF may be configured with a timer, and the timer may be used to determine whether the service duration for the voice service exceeds a predetermined threshold.

The embodiment of the invention can firstly judge whether the service duration aiming at the voice service exceeds the preset threshold value through the timer, and if the service duration aiming at the voice service does not exceed the preset threshold value, the protocol data unit conversation service aiming at the user terminal equipment can be recovered through the context information when the voice service is finished.

Exemplarily, in the process of triggering EPS Fallback by a base station device or a core network device, sending "Nsmf _ PDU _ transmission _ handle SM Context" information to the V-SMF through the AMF, so that the V-SMF suspends PDU Session, in order to reserve the Context information aiming at the UE, the V-SMF can send the information of 'Nsmf _ PDScess _ Handup SM Context Complete' to the AMF, namely, the suspension of the Context information aiming at the PDScess is expressed; the V-SMF starts a PDSSSession _ Handup _ Timer, namely, the V-SMF starts a Timer aiming at PDU Session, the Timer can be set on the V-SMF, the duration of the Timer can be set according to actual requirements, and can also default to 100 seconds; if the PDUSESSION _ Handup _ Timer is not overtime, the V-SMF can keep the current context information aiming at the PDUSESSION, and when a Fast Return process is executed, the UE can recover the context information by using the original PDUSESSION ID after returning to 5G.

In another optional embodiment of the present invention, the method further comprises:

In practical application, if the context information is stored all the time, overload of base station data storage may be caused, so that the embodiment of the present invention may delete the context information to release the PDU session when the service duration for the voice service exceeds the predetermined threshold, thereby reducing the storage pressure of the base station.

Exemplarily, in the process of triggering EPS Fallback by a base station device or a core network device, sending "Nsmf _ PDU _ transmission _ handle SM Context" information to the V-SMF through the AMF, so that the V-SMF suspends PDU Session, in order to reserve the Context information aiming at the UE, the V-SMF can send the information of 'Nsmf _ PDScess _ Handup SM Context Complete' to the AMF, namely, the suspension of the Context information aiming at the PDScess is expressed; the method comprises the steps that V-SMF starts a PDSESSION _ Handup _ Timer, namely, the V-SMF starts a Timer aiming at PDU Session, the Timer can be set on the V-SMF, the duration of the Timer can be set according to actual requirements, and the default duration can be 100 seconds; if the PDUSES _ Handgup _ Timer is overtime, the V-SMF deletes the Context information aiming at the current PDUSES, and sends Nsmf _ PDUSES _ Release SM Context to the AMF, namely, the AMF is informed that the PDU Session Release is executed because the PDU _ Handgup _ Timer is overtime on the Context information aiming at the PDU Session of the UE.

In the embodiment of the invention, whether the service duration aiming at the voice service exceeds a preset threshold value is judged through the timer; if not, when the voice service is finished, restoring the protocol data unit session service aiming at the user terminal equipment through the context information; and if the service duration aiming at the voice service exceeds a preset threshold value, deleting the context information, thereby avoiding the overload of the base station and avoiding the need of reestablishing PDU Session aiming at the UE when the UE initiates a Fast Return flow to the 5G network, and further improving the efficiency aiming at the Fast Return flow.

In an optional embodiment of the present invention, when the voice service is ended and the service duration for the voice service exceeds a predetermined threshold, the pdu session service for the ue is re-established, so that the ue performs the pdu session service based on the fifth generation mobile information network.

In the specific implementation, because the pduse _ handle _ Timer is overtime, the V-SMF has deleted the context information for the current pduse, so in order to implement the UE initiating the Fast Return flow to Return to the 5G network, the embodiment of the present invention can reestablish the pdu session service for the UE when the voice service is finished, so that the UE performs the pdu session service based on the fifth generation mobile information network.

In the embodiment of the invention, when the voice service is finished and the service duration of the voice service exceeds the preset threshold, the protocol data unit Session service aiming at the user terminal equipment is rebuilt, so that the user terminal equipment carries out the protocol data unit Session service based on the fifth generation mobile information network to realize that the context information is deleted, namely, the UE initiates a Fast Return flow to a 5G network on the premise of executing a PDU Session Release flow, thereby further perfecting a Fast Return flow mechanism.

In an optional embodiment of the present invention, before the step of determining, by the timer, whether the service duration for the voice service exceeds a predetermined threshold, the method further includes:

and setting a preset threshold value aiming at the service duration of the voice service according to the instant load parameter.

In practical application, the data load capacity of the base station device or the core network device changes with time change, for example, most of the users with time being 00-06.

It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.

Referring to fig. 3, a block diagram of a structure of a recovery apparatus for a protocol data unit session service provided in the embodiment of the present invention is shown, which may specifically include the following modules:

a request information receiving module 301, configured to receive service initiation request information for a voice service initiated by the user terminal device when the user terminal device performs a protocol data unit session service based on the fifth-generation mobile information network; the voice service is a voice service which is not supported by a new air interface; the voice service has corresponding context information;

a request information executing module 302, configured to execute an evolved packet system fallback based on the service initiation request information, so that the ue performs a voice service based on a fourth-generation mobile information network, and retains the context information through the session management function module;

a session service recovering module 303, configured to recover, through the context information, the pdu session service for the ue.

the service duration judging submodule judges whether the service duration aiming at the voice service exceeds a preset threshold value or not through the timer; if not, calling a session service recovery submodule;

Optionally, the method may further include:

For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.

In addition, an embodiment of the present invention further provides an electronic device, including: the processor, the memory, and the computer program stored in and executable on the memory, where the computer program, when executed by the processor, implements the processes of the above recovery method for a pdu session service, and can achieve the same technical effects, and are not described herein again to avoid repetition.

The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when being executed by a processor, the computer program implements each process of the above recovery method for a protocol data unit session service, and can achieve the same technical effect, and is not described herein again to avoid repetition. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

Fig. 4 is a schematic diagram of a hardware structure of an electronic device implementing various embodiments of the present invention.

The electronic device 400 includes, but is not limited to: radio frequency unit 401, network module 402, audio output unit 403, input unit 404, sensor 405, display unit 406, user input unit 407, interface unit 408, memory 409, processor 410, and power supply 411. Those skilled in the art will appreciate that the electronic device configuration shown in fig. 4 does not constitute a limitation of electronic devices, which may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the electronic device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 401 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 410; in addition, the uplink data is transmitted to the base station. Typically, radio unit 401 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. Further, the radio unit 401 can also communicate with a network and other devices through a wireless communication system.

The electronic device provides wireless broadband internet access to the user via the network module 402, such as assisting the user in sending and receiving e-mails, browsing web pages, and accessing streaming media.

The audio output unit 403 may convert audio data received by the radio frequency unit 401 or the network module 402 or stored in the memory 409 into an audio signal and output as sound. Also, the audio output unit 403 may also provide audio output related to a specific function performed by the electronic apparatus 400 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 403 includes a speaker, a buzzer, a receiver, and the like.

The input unit 404 is used to receive audio or video signals. The input Unit 404 may include a Graphics Processing Unit (GPU) 4041 and a microphone 4042, and the Graphics processor 4041 processes image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 406. The image frames processed by the graphic processor 4041 may be stored in the memory 409 (or other storage medium) or transmitted via the radio frequency unit 401 or the network module 402. The microphone 4042 may receive sound, and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 401 in case of the phone call mode.

The electronic device 400 also includes at least one sensor 405, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 4061 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 4061 and/or the backlight when the electronic apparatus 400 is moved to the ear. As one type of motion sensor, an accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the posture of an electronic device (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), and vibration identification related functions (such as pedometer, tapping); the sensors 405 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which will not be described in detail herein.

The display unit 406 is used to display information input by the user or information provided to the user. The Display unit 406 may include a Display panel 4061, and the Display panel 4061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 407 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the electronic device. Specifically, the user input unit 407 includes a touch panel 4071 and other input devices 4072. Touch panel 4071, also referred to as a touch screen, may collect touch operations by a user on or near it (e.g., operations by a user on or near touch panel 4071 using a finger, a stylus, or any suitable object or attachment). The touch panel 4071 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 410, receives a command from the processor 410, and executes the command. In addition, the touch panel 4071 can be implemented by using various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 4071, the user input unit 407 may include other input devices 4072. Specifically, the other input devices 4072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a track ball, a mouse, and a joystick, which are not described herein again.

Further, the touch panel 4071 can be overlaid on the display panel 4061, and when the touch panel 4071 detects a touch operation thereon or nearby, the touch operation is transmitted to the processor 410 to determine the type of the touch event, and then the processor 410 provides a corresponding visual output on the display panel 4061 according to the type of the touch event. Although in fig. 4, the touch panel 4071 and the display panel 4061 are two independent components to implement the input and output functions of the electronic apparatus, in some embodiments, the touch panel 4071 and the display panel 4061 may be integrated to implement the input and output functions of the electronic apparatus, which is not limited herein.

The interface unit 408 is an interface for connecting an external device to the electronic apparatus 400. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 408 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the electronic apparatus 400 or may be used to transmit data between the electronic apparatus 400 and an external device.

The memory 409 may be used to store software programs as well as various data. The memory 409 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 409 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 410 is a control center of the electronic device, connects various parts of the entire electronic device using various interfaces and lines, performs various functions of the electronic device and processes data by operating or executing software programs and/or modules stored in the memory 409 and calling data stored in the memory 409, thereby integrally monitoring the electronic device. Processor 410 may include one or more processing units; preferably, the processor 410 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 410.

The electronic device 400 may further comprise a power supply 411 (e.g. a battery) for supplying power to various components, and preferably, the power supply 411 may be logically connected to the processor 410 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system.

In addition, the electronic device 400 includes some functional modules that are not shown, and are not described in detail here.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the particular illustrative embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and equivalents thereof, which may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention or a part thereof which substantially contributes to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk or an optical disk, and various media capable of storing program codes.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A recovery method for a protocol data unit session service is characterized in that the method is applied to a base station device or a core network device, the base station device or the core network device includes an accessed session management function module, and the base station device or the core network device has a corresponding user terminal device, and the method includes:

performing an evolved packet system fallback based on the service initiation request information, so that the user terminal device performs a voice service based on a fourth generation mobile information network, and retains the context information through the session management function module;

2. The method of claim 1, wherein the visited session management function is configured with a timer, and wherein the step of recovering the pdu session traffic for the ue through the context information comprises:

3. The method of claim 2, further comprising:

4. The method of claim 3, further comprising:

5. The method of claim 2, wherein before the step of determining by the timer whether the traffic duration for the voice traffic exceeds a predetermined threshold, the method further comprises:

6. A recovery device for a protocol data unit session service is characterized in that the device is applied to a base station device or a core network device, the base station device or the core network device includes a visited session management function module, and the base station device or the core network device has a corresponding user terminal device, and the device includes:

7. The apparatus of claim 6, wherein the visited session management function module is configured with a timer, and wherein the session traffic recovery module comprises:

8. The apparatus of claim 7, further comprising:

9. The apparatus of claim 8, further comprising:

10. The apparatus of claim 7, further comprising:

a load parameter obtaining sub-module, configured to obtain an instant load parameter of the base station device or the core network device;

11. An electronic device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;

the memory is used for storing a computer program;

the processor, when executing a program stored on the memory, implementing the method of any of claims 1-5.

12. A computer-readable storage medium having stored thereon instructions, which when executed by one or more processors, cause the processors to perform the method of any one of claims 1-5.