CN114286301A

CN114286301A - Voice service control method and device, storage medium and terminal equipment

Info

Publication number: CN114286301A
Application number: CN202111680039.9A
Authority: CN
Inventors: 祝定静; 金逸
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-04-05
Anticipated expiration: 2041-12-31
Also published as: CN114286301B

Abstract

A voice service control method and device, storage medium and terminal equipment are provided, the voice service control method includes: when the traditional communication network returns to the new wireless network, executing the reconstruction flow of the IMS PDU; and initiating an IMS registration process and synchronizing the IMS state with the new wireless network. The technical scheme of the invention can ensure the normal operation of voice service and data service when the terminal equipment is switched among different communication networks.

Description

Voice service control method and device, storage medium and terminal equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a voice service control method and apparatus, a storage medium, and a terminal device.

Background

A terminal device (UE) is registered in a fifth generation mobile communication technology (5th generation mobile network or 5th generation wireless System, 5G) network, and when a User initiates a telephone service or receives a telephone page, if the UE does not support a New wireless Voice service (VONR) or the current 5G network does not support a VONR, the UE will fall back to the fourth generation mobile communication technology (4th generation mobile network or 4th generation wireless System, 4G) network by an Evolved Packet System (EPS) fall back (Fallback) or network selection.

In the case that the current 4G network is unavailable or the 4G network signal is poor, for example, in the case of Single Radio Voice Call Continuity (SRVCC), the UE will finally fall back to the 2/3G network for the telephone service. If the UE does not perform Packet Switching domain (PS) registration in the 2/3G network, and then after the 2/3G network ends the phone service, it does not directly return to 5G network registration through the 4G network, in this scenario, according to the protocol, the UE may perform mobility registration.

However, the UE may have a normal mobility registration in the real network, but the IP Multimedia Subsystem (IMS) network state is abnormal, the UE has an abnormal telephone service in the 5G network, the network cannot initiate an EPS Fallback, and both the calling and the called fail.

Disclosure of Invention

The invention solves the technical problem of how to ensure the normal operation of voice service and data service when the terminal equipment is switched among different communication networks.

In order to solve the foregoing technical problem, in a first aspect, an embodiment of the present invention provides a voice service control method, where the voice service control method includes: when the traditional communication network returns to the new wireless network, executing the reconstruction flow of the IMS PDU; and initiating an IMS registration process and synchronizing the IMS state with the new wireless network.

Optionally, the performing the IMS PDU rebuilding procedure includes: detecting the state of the IMS PDU; and executing the rebuilding process of the IMS PDU according to the state of the IMS PDU.

Optionally, the performing the reestablishment procedure of the IMS PDU according to the state of the IMS PDU includes: if the IMS PDU state is the activated state, initiating an IMS PDU session release process to release the current IMS PDU session; and initiating a reestablishment process of the IMS PDU to establish a new IMS PDU session.

Optionally, the performing the IMS PDU rebuilding procedure includes: determining whether a circuit domain service is performed in the legacy communication network and a packet switched domain registration is not performed in the legacy network; and if so, executing the reconstruction flow of the IMS PDU.

Optionally, the conventional communication network is a 2G network or a 3G network, the new wireless network is a 5G network, and the performing the reestablishment procedure of the IMS PDU includes: and when determining that the circuit domain service is executed in the 2G network or the 3G network, the packet switched domain registration is not carried out in the 2G network or the 3G network, and the packet switched domain registration is not carried out in the 4G network in the process of returning to the 5G network, executing the reestablishment process of the IMS PDU.

Optionally, before the performing the IMS PDU reestablishment procedure, the method further includes: registering in the new wireless network, and establishing an IMS PDU session and a data service session; fall back to the legacy communication network and initiate a circuit domain registration or circuit domain service.

Optionally, the dropping back to the legacy communication network includes: directly from the new wireless network back to the legacy communication network.

Optionally, the legacy communication network is a 2G network or a 3G network, and the dropping back to the legacy communication network includes: falling back to the 4G network, and performing tracking area updating in the 4G network; and dropping to the 2G network or the 3G network.

Optionally, before the performing the IMS PDU reestablishment procedure, the method further includes: performing mobility registration at the new wireless network.

In a second aspect, an embodiment of the present invention further discloses a voice service control device, where the voice service control device includes: the reestablishment module is used for executing the reestablishment process of the IMS PDU when the traditional communication network returns to the new wireless network; and the registration module is used for initiating an IMS registration process and synchronizing the IMS state with the new wireless network.

In a third aspect, an embodiment of the present invention further discloses a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to perform the steps of the voice service control method.

In a fourth aspect, the embodiment of the present invention further discloses a terminal device, which includes a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor executes the steps of the voice service control method when running the computer program.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

in the technical scheme of the invention, when the traditional communication network of the terminal equipment returns to the new wireless network, the reconstruction process of the IMS PDU can be executed, and the IMS registration process can be restarted. By reestablishing the IMS PDU session and carrying out IMS registration again, the abnormal voice telephone service can be avoided, and the smooth development of the voice service is ensured; in addition, since the session of the data service still maintains a normal state, the data service can be continued in the new wireless network.

Drawings

Fig. 1 is a flowchart of a voice service control method according to an embodiment of the present invention;

fig. 2 is a detailed flowchart of a voice service control method according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a voice service control apparatus according to an embodiment of the present invention.

Detailed Description

The new wireless network applicable to the embodiment of the present application includes, but is not limited to, a fifth generation (5th-generation, 5G) system, an NR system, and a future evolution system or a multiple communication convergence system. The 5G system may be a non-standalone (NSA) 5G system or a Standalone (SA) 5G system. The technical solution of the present application is also applicable to different network architectures, including but not limited to a relay network architecture, a dual link architecture, a Vehicle-to-event architecture, and the like.

The present application relates generally to communication between a terminal device and a network device. Wherein:

the Network device in the embodiment of the present application may also be referred to as an Access Network device, and may be, for example, a Base Station (BS) (also referred to as a base station device), where the Network device is a device deployed in a Radio Access Network (RAN) to provide a wireless communication function. For example, a device providing a base station function in a second generation (2nd-generation, 2G) network includes a Base Transceiver Station (BTS), a device providing a base station function in a third generation (3rd-generation, 3G) network includes a node B (NodeB), a device providing a base station function in a fourth generation (4th-generation, 4G) network includes an Evolved node B (eNB), and in a Wireless Local Area Network (WLAN), the device providing a base station function is an Access Point (AP), a next generation base station node (gNB) providing a base station function in NR, and a continuously Evolved node B (eNB), wherein the gNB and the terminal device communicate using NR technology, the eNB and the terminal device communicate using Evolved Universal Radio Access (Radio), E-UTRA) technology, both the gNB and ng-eNB can connect to the 5G core network. The network device in the embodiment of the present application also includes a device that provides a base station function in a future new communication system, and the like.

A terminal equipment (terminal equipment) in the embodiments of the present application may refer to various forms of an access terminal, a subscriber unit, a subscriber station, a Mobile Station (MS), a remote station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in this embodiment. A terminal device may also be referred to as a User Equipment (UE), a terminal, etc.

As described in the background art, the UE may have a normal mobility registration in the real network, but the IP Multimedia Subsystem (IMS) network state is abnormal, the UE has an abnormal telephone service in the 5G network, the network cannot initiate an EPS Fallback, and both the calling and the called fail.

In order to solve the problem of abnormal telephone service, the prior art is to perform 5G initial registration directly after returning to the 5G network to resume the communication between the UE and the 5G network after the UE finishes the telephone call in the 2/3G network even if no PS domain registration occurs.

However, the prior art scheme has a disadvantage that after the UE returns to the 5G network, the user may not use the data service for a while, and the user experience is not good.

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

Fig. 1 is a flowchart of a voice service control method according to an embodiment of the present invention.

The voice service control method can be used in a terminal device, that is, the terminal device can execute each step of the method, and a chip in the terminal device can execute each step of the method.

Specifically, the voice service control method may include the steps of:

step 101: when the traditional communication network returns to the new wireless network, executing the reconstruction flow of the IMS PDU;

step 102: and initiating an IMS registration process and synchronizing the IMS state with the new wireless network.

It should be noted that the sequence numbers of the steps in this embodiment do not represent a limitation on the execution sequence of the steps.

It is understood that, in a specific implementation, the voice service control method may be implemented by using a software program, where the software program runs in a processor integrated inside a chip or a chip module. The method may also be implemented by combining software and hardware, and the present application is not limited thereto.

The conventional communication network referred to in the embodiment of the present invention may be a second generation (2nd-generation, 2G) network or a third generation (3rd-generation, 3G) network.

In a specific implementation of step 101, the terminal device may perform a reconstruction procedure of an IMS Packet Data Unit (PDU) to re-establish an IMS PDU session (session).

Specifically, the IMS PDU reestablishment procedure may be that the terminal device initiates a PDU session establishment request to the network device, and the network device returns a PDU session establishment accept in response to the PDU session establishment request.

It should be noted that, for a specific implementation of the IMS PDU rebuilding process (for example, parameters carried in the setup request by the terminal device, parameters returned by the network device, and the like), reference may be made to the prior art, and details are not described herein again.

After reestablishing the IMS PDU session, in an implementation of step 102, the terminal device may initiate a procedure of IMS registration to synchronize the terminal device with the new wireless network for the state of IMS.

Compared with the prior art that 5G initial registration is directly carried out, the embodiment of the invention can ensure the normal operation of the telephone service through IMS registration. In addition, in the prior art, when 5G initial registration is directly performed, a local data service PDU session is released, and a certain time is required for establishing the data service PDU session, for example, after the PDU session is released, there is a waiting time, usually 5 to 10 seconds, for re-initiating establishment of a data connection by a terminal device, so that a user cannot use a data service within a period of time. The embodiment of the invention executes IMS registration, and PDU conversation of the data service is reserved, thereby ensuring normal development of the data service and improving user experience.

In one non-limiting embodiment, step 101 may include the steps of: the terminal equipment can detect the state of the IMS PDU; and executing the rebuilding process of the IMS PDU according to the state of the IMS PDU.

In this embodiment, when the terminal device returns to the new wireless network from the conventional communication network, the state of the IMS PDU may be an active state or an inactive state. Different states of the IMS PDU may cause different procedures for the terminal device to perform the reconstruction of the IMS PDU.

Further, if the state of the IMS PDU is an activated state, initiating an IMS PDU session release process to release the current IMS PDU session; and initiating a reestablishment process of the IMS PDU to establish a new IMS PDU session.

In this embodiment, for an IMS PDU session in an active state, a terminal device needs to release a current IMS PDU session first, and then can initiate a reestablishment procedure of the IMS PDU.

Further, if the state of the IMS PDU is inactive, the terminal device may directly initiate a reestablishment procedure of the IMS PDU.

In one non-limiting embodiment, the terminal device determines whether a circuit domain service is executed in the legacy communication network and a packet switched domain registration is not performed in the legacy network; and if so, executing the reconstruction flow of the IMS PDU.

In the embodiment of the invention, the terminal equipment can detect the service execution condition and the registration condition of the terminal equipment in the traditional network according to the history record and determine whether to execute the reestablishment process of the IMS PDU. The terminal equipment executes the reestablishment process of the IMS PDU under the condition that the traditional communication network executes the circuit domain service and the packet switched domain registration is not carried out in the traditional network.

In a specific embodiment, the legacy communication network is a 2G network or a 3G network, and the new wireless network is a 5G network. And the terminal equipment determines that the circuit domain service is executed in the 2G network or the 3G network, the packet switching domain registration is not carried out in the 2G network or the 3G network, and the reestablishment process of the IMS PDU is executed when the packet switching domain registration is not carried out in the 4G network in the process of returning to the 5G network.

In a non-limiting embodiment, before step 101 shown in fig. 1, the terminal device registers in the new wireless network and establishes an IMS PDU session and a data service session; the terminal device falls back to the conventional communication network and initiates circuit domain registration or circuit domain service. In this case, the return of the terminal device from the conventional communication network to the new wireless network occurs.

Specifically, the reason why the terminal device does not perform the packet switched domain registration in the 2/3G network may be one or more of the following reasons, which is not limited by the embodiment of the present invention:

1. circuit domain services are executed under a 2G network, and packet switching domain registration cannot be carried out at the same time;

2. 2/3G network indicates that packet switched domain services are not supported;

3. the 2/3G network may be a network that is restricted from residing, such as placing an emergency call on a restricted network.

In a specific embodiment, referring to fig. 2, fig. 2 shows a specific flow of a voice service control method. In the embodiment of the invention, the traditional communication network is 2/3G network, and the new wireless network is 5G network.

It should be understood by those skilled in the art that the legacy communication network and the new wireless network may be any other network system that can be implemented, and the embodiment of the present invention is not limited thereto.

In step 201, the terminal device performs initial registration with the 5G network. The terminal equipment and the 5G network establish an IMS PDU session and a data service PDU session, and the terminal equipment and the 5G network carry out voice service and data service.

In step 202, the terminal device falls back to the 2/3G network for CS traffic. Specifically, the terminal device may fall back to the 2/3G network and initiate CS domain registration or CS domain services (CS services include all services that establish CS domain connections, such as telephony, sms, supplementary services, etc.).

The fall back of the terminal device from the 5G network to the 2/3G network may include the following two ways:

a. the terminal device first falls back to the 4G network, performs Tracking Area Update (TAU) in the 4G network, and then falls back to the 2/3G network;

b. the UE falls back to the 2/3G network directly from the 5G network.

Specifically, the terminal device dropping back to 2/3G network may be triggered by CS service, such as telephony service, the terminal device dropping back according to priority selection, or SRVCC occurring in 4G network signal weakness, etc.; the present invention may also be triggered by a non-CS service, for example, the fluctuation of 5G network information falls to 2/3G network, and the embodiment of the present invention is not limited to this.

In step 203, the terminal device returns to the 5G network and performs mobility registration.

Specifically, the terminal device ends the CS domain service in 2/3G network, and then returns directly to 5G. If the terminal device falls back to the 2/3G network in step 202 in the scenario described in the manner a, the terminal device performs mobility registration in the 5G network and the registration is successful. If the terminal device falls back to the 2/3G network in step 202 in the scenario described in manner b, the terminal device does not need to perform mobility registration.

In step 204, the terminal device initiates an IMS PDU session release.

Specifically, the terminal device detects that the CS service was performed in the 2/3G network, but the PS domain registration was not performed, and the terminal device did not register in the 4G network before returning to the 5G network directly in the 5G returning process. If the IMS PDU session of the terminal equipment is still in an activated state at this time, the terminal equipment initiates a PDU session release (session release) process to actively release the IMS PDU session.

More specifically, the PDU session release procedure includes the following steps:

4.1, the terminal equipment sends a PDU SESSION RELEASE REQUEST (PDU SESSION RELEASE REQUEST);

4.2, 5G network device returns PDU conversation RELEASE COMMAND (PDU Session RELEASE COMMAND);

4.3, the terminal equipment RELEASEs the PDU SESSION and returns the PDU SESSION RELEASE completion (PDU Session Release COMPLETE) to the 5G network.

In step 205, the terminal device initiates an IMS PDU session setup.

Specifically, the PDU session establishment procedure includes the following steps:

5.1, the terminal equipment sends a PDU SESSION ESTABLISHMENT REQUEST (PDU SESSION ESTABLISHMENT REQUEST);

5.2, 5G network equipment returns PDU SESSION ESTABLISHMENT acceptance (PDU Session ESTABLISHMENT acceptance).

In step 206, the terminal device re-performs IMS registration.

The embodiment of the invention re-synchronizes the IMS state with the network by re-establishing the IMS PDU session and re-performing the IMS registration so as to avoid the occurrence of abnormal telephone service; because the data service PDU session is kept in a normal state, after the terminal equipment returns to the 5G network from the 2/3G network, the data service can still continue in the 5G network, and the user experience is improved.

Referring to fig. 3, an embodiment of the present invention further discloses a voice service control apparatus. The voice traffic control apparatus 30 may include:

a reestablishing module 301, configured to execute a reestablishing procedure of an IMS PDU when a conventional communication network returns to a new wireless network;

a registration module 302, configured to initiate an IMS registration procedure and synchronize an IMS state with the new wireless network.

Further, the reconstruction module 301 may include: the detection unit is used for detecting the state of the IMS PDU; and the rebuilding unit is used for executing the rebuilding process of the IMS PDU according to the state of the IMS PDU.

Further, when the IMS PDU state is an active state, the rebuilding module 301 initiates an IMS PDU session release procedure to release the current IMS PDU session; and initiating a reestablishment process of the IMS PDU to establish a new IMS PDU session.

For more contents of the operation principle and the operation mode of the voice service control apparatus 30, reference may be made to the relevant descriptions in fig. 1 to fig. 2, which are not described herein again.

In a specific implementation, the voice service control device may correspond to a Chip having a voice service control function in the terminal device, such as a System-On-a-Chip (SOC), a baseband Chip, and the like; or the terminal device comprises a chip module with a voice service control function; or to a chip module having a chip with a data processing function, or to a terminal device.

Each module/unit included in each apparatus and product described in the above embodiments may be a software module/unit, or may also be a hardware module/unit, or may also be a part of a software module/unit and a part of a hardware module/unit. For example, for each device or product applied to or integrated into a chip, each module/unit included in the device or product may be implemented by hardware such as a circuit, or at least a part of the module/unit may be implemented by a software program running on a processor integrated within the chip, and the rest (if any) part of the module/unit may be implemented by hardware such as a circuit; for each device or product applied to or integrated with the chip module, each module/unit included in the device or product may be implemented by using hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components of the chip module, or at least some of the modules/units may be implemented by using a software program running on a processor integrated within the chip module, and the rest (if any) of the modules/units may be implemented by using hardware such as a circuit; for each device and product applied to or integrated in the terminal, each module/unit included in the device and product may be implemented by using hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components in the terminal, or at least part of the modules/units may be implemented by using a software program running on a processor integrated in the terminal, and the rest (if any) part of the modules/units may be implemented by using hardware such as a circuit.

The embodiment of the invention also discloses a storage medium which is a computer readable storage medium and stores a computer program, and the computer program can execute the steps of the method when running. The storage medium may include ROM, RAM, magnetic or optical disks, etc. The storage medium may further include a non-volatile memory (non-volatile) or a non-transitory memory (non-transient), and the like.

The embodiment of the invention also discloses automatic equipment, and the terminal equipment can comprise a memory and a processor, wherein the memory is stored with a computer program which can run on the processor. The processor, when executing the computer program, may perform the steps of the method as described above. The terminal device includes, but is not limited to, a mobile phone, a computer, a tablet computer, and the like.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this document indicates that the former and latter related objects are in an "or" relationship.

The "plurality" appearing in the embodiments of the present application means two or more.

The descriptions of the first, second, etc. appearing in the embodiments of the present application are only for illustrating and differentiating the objects, and do not represent the order or the particular limitation of the number of the devices in the embodiments of the present application, and do not constitute any limitation to the embodiments of the present application.

The term "connect" in the embodiments of the present application refers to various connection manners, such as direct connection or indirect connection, to implement communication between devices, which is not limited in this embodiment of the present application.

It should be understood that, in the embodiment of the present application, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example and not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM), SDRAM (SLDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire or wirelessly. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more collections of available media. It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed method, apparatus and system may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative; for example, the division of the unit is only a logic function division, and there may be another division manner in actual implementation; for example, various elements or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. 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 be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit 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 some steps of the methods according to the embodiments of the present invention.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. a voice service control method, is characterized in that, comprises:

When returning from the traditional communication network to the new wireless network, perform the reconstruction process of the IMS PDU;

An IMS registration procedure is initiated and the state of the IMS is synchronized with the new wireless network.

2. The voice service control method according to claim 1, wherein the execution of the reconstruction process of the IMS PDU comprises:

Check the status of the IMS PDU;

The re-establishment process of the IMS PDU is performed according to the state of the IMS PDU.

3. The voice service control method according to claim 2, wherein the performing the reconstruction process of the IMS PDU according to the state of the IMS PDU comprises:

If the state of the IMS PDU is the active state, initiate an IMS PDU session release procedure to release the current IMS PDU session;

Initiate the IMS PDU re-establishment procedure to establish a new IMS PDU session.

4. The voice service control method according to claim 1, wherein the execution of the reconstruction process of the IMS PDU comprises:

determining whether circuit domain services are performed on the legacy communication network and no packet-switched domain registration is performed on the legacy network;

If so, perform the reconstruction procedure of the IMS PDU.

5. The voice service control method according to claim 1, wherein the traditional communication network is a 2G network or a 3G network, the new wireless network is a 5G network, and the reconstruction process of executing the IMS PDU comprises:

It is determined that the circuit domain service is performed on the 2G network or 3G network, the packet-switched domain registration is not performed on the 2G or 3G network, and the IMS PDU reconstruction process is performed when the 4G network is not registered during the process of returning to the 5G network.

6. The voice service control method according to claim 1, further comprising:

Perform registration in the new wireless network, and establish an IMS PDU session and a data service session;

Fall back to the legacy communication network and initiate CS domain registration or CS domain traffic.

7. The voice service control method according to claim 6, wherein the falling back to the traditional communication network comprises:

Fall back directly from the new wireless network to the legacy communication network.

8. The voice service control method according to claim 6, wherein the traditional communication network is a 2G network or a 3G network, and the falling back to the traditional communication network comprises:

fall back to the 4G network and perform a tracking area update on the 4G network;

Fall back to the 2G network or 3G network.

9. The voice service control method according to claim 8, further comprising:

Mobility registration is performed on the new wireless network.

10. A voice service control device, comprising:

The reconstruction module is used to perform the reconstruction process of the IMS PDU when returning from the traditional communication network to the new wireless network;

The registration module is used for initiating an IMS registration process and synchronizing the state of the IMS with the new wireless network.

11. A computer-readable storage medium on which a computer program is stored, wherein the computer program executes the steps of the voice service control method according to any one of claims 1 to 9 when the computer program is run by a processor.

12. A terminal device, comprising a memory and a processor, wherein the memory stores a computer program that can run on the processor, wherein the processor executes claims 1 to 1 when the processor runs the computer program. Steps of the voice service control method described in any one of 9.