CN113329355B - Voice service returning method, terminal equipment and storage medium - Google Patents

Voice service returning method, terminal equipment and storage medium Download PDF

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Publication number
CN113329355B
CN113329355B CN202110597463.0A CN202110597463A CN113329355B CN 113329355 B CN113329355 B CN 113329355B CN 202110597463 A CN202110597463 A CN 202110597463A CN 113329355 B CN113329355 B CN 113329355B
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network
voice service
timer
terminal device
return
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CN113329355A (en
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司广磊
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/16—Communication-related supplementary services, e.g. call-transfer or call-hold
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data

Abstract

The embodiment of the application discloses a voice service returning method, terminal equipment and a storage medium, wherein the method comprises the following steps: when voice service is detected on a first network, if the voice service is determined not to be supported, sending a return request to network equipment, and starting a timer; if the return instruction sent by the network equipment is not received within the running time of the timer, executing network searching processing to obtain the measurement information of the second network; and returning to the second network according to the measurement information so as to carry out voice service on the second network.

Description

Voice service returning method, terminal equipment and storage medium
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, a terminal device, and a storage medium for returning a voice service.
Background
The fifth generation mobile communication technology (5 th generation mobile networks, 5G) is the latest generation cellular mobile communication technology, wherein two voice access modes are defined in the 5G network: the New air interface carries Voice over New Radio (VoNR) and Evolved Packet System Fallback (EPS Fallback).
However, in the actual application process, the EPS fallback voice solution cannot ensure the successful establishment of the voice service, and reduces the reliability of the voice service.
Disclosure of Invention
The embodiment of the application provides a voice service returning method, terminal equipment and a storage medium, which can ensure the successful establishment of the voice service and improve the reliability of the voice service.
The technical scheme of the embodiment of the application is realized as follows:
in a first aspect, an embodiment of the present application provides a method for returning a voice service, where the method includes:
when voice service is detected on a first network, if the voice service is determined not to be supported, sending a return request to network equipment, and starting a timer;
if a return instruction issued by the network equipment is not received within the running time of the timer, network searching processing is executed to obtain measurement information of a second network;
and returning to the second network according to the measurement information so as to perform the voice service on the second network.
In a second aspect, an embodiment of the present application provides a terminal device, where the terminal device includes: a sending unit, a starting unit, an executing unit, a returning unit,
the sending unit is configured to send a return request to the network device if it is determined that the voice service is not supported when the voice service is detected on the first network;
the starting unit is used for starting a timer;
the execution unit is configured to execute network searching processing to obtain measurement information of a second network if a return instruction issued by the network device is not received within the running time of the timer;
the returning unit is configured to return to the second network according to the measurement information, so as to perform the voice service on the second network.
In a third aspect, an embodiment of the present application provides a terminal device, where the terminal device includes a processor and a memory storing instructions executable by the processor, and when the instructions are executed by the processor, the method for returning a voice service according to the first aspect is implemented.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a program is stored, where the program, when executed by a processor, implements the method for returning voice service according to the first aspect.
The embodiment of the application provides a voice service returning method, terminal equipment and a storage medium, when voice service is detected on a first network, if the voice service is determined not to be supported, a returning request is sent to the network equipment, and a timer is started; if the return instruction sent by the network equipment is not received within the running time of the timer, executing network searching processing to obtain the measurement information of the second network; and returning to the second network according to the measurement information so as to carry out voice service on the second network. Therefore, in the embodiment of the application, in the EPS fallback communication process, the terminal device can start the tepsfailback protection timer, and when the timer is overtime and does not receive the return indication sent by the network device, the terminal device selects the autonomous fallback LTE to establish the VoLTE communication, so that the problem that the terminal device cannot fallback 4G due to the fact that the terminal device does not receive the return indication in an abnormal scene can be effectively solved, the successful establishment of the voice service can be ensured, and the reliability of the voice service is improved.
Drawings
Fig. 1 is a schematic diagram of an application scenario of cell camping;
fig. 2 is a first schematic flow chart illustrating an implementation of a voice service returning method according to an embodiment of the present application;
fig. 3 is a schematic flowchart illustrating a second implementation flow of the method for returning a voice service according to the embodiment of the present application;
fig. 4 is a schematic flowchart illustrating an implementation process of the fallback method for voice service according to the embodiment of the present application;
fig. 5 is a schematic flow chart illustrating an implementation process of a fallback method for a voice service according to an embodiment of the present application;
fig. 6 is a schematic flowchart illustrating an implementation flow of the method for returning a voice service according to the embodiment of the present application;
fig. 7 is a schematic flow chart illustrating a sixth implementation process of the voice service returning method according to the embodiment of the present application;
fig. 8 is a seventh implementation flow diagram of a voice service returning method according to an embodiment of the present application;
fig. 9 is an implementation flow diagram eight of a return method of a voice service according to the embodiment of the present application;
fig. 10 is a first schematic structural diagram of a terminal device according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of a terminal device 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 drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are illustrative of the relevant application and are not limiting of the application. It should be further noted that, for the convenience of description, only the portions relevant to the related applications are shown in the drawings.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the application.
In the following description, reference is made to "some embodiments" which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict. It should also be noted that reference to the terms "first \ second \ third" in the embodiments of the present application is only used for distinguishing similar objects and does not represent a specific ordering for the objects, and it should be understood that "first \ second \ third" may be interchanged with a specific order or sequence where possible so that the embodiments of the present application described herein can be implemented in an order other than that shown or described herein.
In the fourth generation mobile communication technology (4 g) network, when a terminal (User Equipment, UE) initiates a voice service, two methods are mainly included: voice over Long-Term Evolution (VoLTE) and Circuit Switched Fallback (CS Fallback) over Long Term Evolution (Long Term Evolution, LTE). For the CS fallback mode, when initiating a voice service, the UE may carry an Extra Service Request (ESR) to the core network device, and directly initiate the CS fallback.
With the further acceleration of the 5G standard of the third Generation Partnership project (3 gpp), voice solutions for 5G terminals are gaining increasing attention in the industry.
Two voice access modes are defined in a 5G network: voNR over New Radio (NR) and EPS fallback. The VoNR scheme is that a 5G access network and a core network provide a voice service based on an IP Multimedia Subsystem (IMS), and the EPS fallback scheme is that a terminal falls back to 4G when initiating an IMS call on the 5G network, and the voice service is implemented through the 4G network.
Currently, in the EPS fallback scheme, the UE first performs attachment and registration on the core network side, and implements IMS domain registration, and then enters an idle state. When there is voice service, a corresponding Quality of service flow (QoS flow) is established for the voice service, and then the Radio Access Network (RAN) side determines whether to initiate an EPS fallback or a VoNR, which involves multiple interactions between the wireless side and the core Network.
In the initial stage of 5G deployment, the coverage degree of a 4G network cannot be achieved, and the coverage is mainly in a hot spot area, so that a fast internet access service is provided for a mobile phone terminal user, and for a 5G voice service, most of existing operators do not support VoNR and rely on the conventional VoLTE to provide a voice service, so that a voice solution of EPS fallback provided by 3GPP for a terminal that does not support VoNR can be used for performing the voice service on 5G, and the terminal cooperates with the network to fall back to LTE to perform the VoLTE voice service, thereby realizing voice continuity.
However, in the EPS fallback voice solution, in the actual application process, the terminal triggers the voice service on the 5G, and the network side may issue a redirection or handover command to instruct the terminal to fall back to the LTE for performing the VoLTE voice service under a normal condition, but because the network side cannot issue the command normally or the network side issues the command, the terminal side cannot normally analyze and acquire the command because of problems such as network coverage, or because the network side fails to allocate to the measurement control of B1 of the LTE and other abnormal conditions, the terminal cannot fall back to the LTE for performing the VoLTE voice service, thereby causing a call setup failure and seriously affecting the voice service experience of the 5G terminal.
Therefore, the existing EPS fallback voice solution cannot ensure the successful establishment of the voice service, and the reliability of the voice service is reduced.
In order to solve the above problem, in the embodiment of the present application, in the EPS fallback session, the terminal device may start a tepsfailback protection timer, and when the timer is overtime and does not receive a return instruction issued by the network device, the terminal device selects an autonomous fallback LTE to perform VoLTE session establishment, so that the problem that the terminal device cannot fall back to 4G due to the fact that the terminal device does not receive the return instruction in an abnormal scene can be effectively solved, thereby ensuring successful establishment of a voice service and improving reliability of the voice service.
It can be understood that, for a terminal device supporting a 5G network, procedures such as attach and registration are performed after the terminal device is powered on, and the terminal device enters an idle state after IMS registration is performed. Thereafter, the calling/called (voice service) of the idle terminal sends invite signaling to the IMS through a Scheduling Request (SR) process, protocol Data Unit (PDU) session (session) reestablishment, and the like. After Invite signaling is sent to IMS, the IMS indicates a core network (5G), the core network (5G) requires a base station (5G) to perform bearer establishment (QoS flow establishment), and the base station (5G) determines to use VoNR or trigger EPS fallback to implement a voice service according to UE capability, access and Mobility Management Function (AMF) indication, network configuration (whether a network interface exists between a 5G network and a 4G network), radio conditions (radio environment information), and the like.
In this application, a network device is a device in a wireless network, for example, a RAN node that accesses a terminal to the wireless network. Currently, some examples of RAN nodes are: a gbb, a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), or a wireless fidelity (Wifi) access point (access point, AP), etc. In one network structure, a network device may include a Centralized Unit (CU) node, or a Distributed Unit (DU) node, or a RAN device including a CU node and a DU node, which is not limited herein.
In the application, the terminal device may be a wireless terminal device or a wired terminal device, and the wireless terminal device may refer to a device having a wireless transceiving function, and may be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self driving (self driving), a wireless terminal device in remote medical treatment (remote medical), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), and the like, which are not limited herein.
It can be understood that, in the embodiment of the present application, a terminal device may also be referred to as a User Equipment (UE).
The technical solution described in the embodiments of the present application can be used in various communication systems, including a 2g,3g,4g,5g communication System or a next generation (next generation) communication System, such as a Global System for mobile communications (GSM), a Code Division Multiple Access (Code Division Multiple Access, CDMA) System, a Time Division Multiple Access (TDMA) System, a Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA), a Frequency Division Multiple Access (Frequency Division Multiple Access, FDMA) System, an Orthogonal Frequency Division Multiple Access (Orthogonal-Division Multiple Access, OFDMA) System, an FDMA (SC-FDMA) System, a General Packet Radio Service (General Packet Radio Service, service) System, an LTE System, an NR System, and so on.
It should be noted that, in the embodiment of the present application, fig. 1 is a schematic view of an application scenario in which a cell resides, and as shown in fig. 1, the voice service fallback method provided in the present application may be applied to a terminal device, where a communication connection is established between the terminal device and a network device. Optionally, the terminal device may establish a communication connection with the network device through a fourth-generation, fifth-generation, and other mobile communication technologies, and a communication connection manner of the terminal device and the network device is not limited in this embodiment of the present application.
In general, a plurality of network devices may exist near a terminal device, the terminal device may select a cell as a serving cell (may also be referred to as a "camping cell") according to a service quality value (such as signal quality) of a cell in which each network device is located, service quality values of cells in which different network devices are located may differ, and the terminal device should camp in a cell with a better service quality value. As shown in fig. 1, it is assumed that there are three network devices, which are a network device 1, a network device 2, and a network device 3, and the terminal device resides in a cell 1 where the network device 1 is located, where the cell 1 is a serving cell of the terminal device, and both the cell 2 where the network device 2 is located and the cell 3 where the network device 3 is located are adjacent to the cell 1, that is, the cell 2 and the cell 3 are adjacent cells (also referred to as "neighbor cells") of the cell 1.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
An embodiment of the present application provides a method for returning a voice service, fig. 2 is a schematic view illustrating a first implementation flow of the method for returning a voice service provided in the embodiment of the present application, and as shown in fig. 2, in the embodiment of the present application, a method for returning a voice service by a terminal device may include the following steps:
step 101, when voice service is detected on a first network, if it is determined that the voice service is not supported, sending a return request to a network device, and starting a timer.
In the embodiment of the present application, when the terminal device resides in the first network, if voice traffic is detected on the first network, the terminal device may send a fallback request to the network device of the first network after determining that the voice traffic is not supported, and may also start a timer.
It should be noted that, in the embodiment of the present application, when determining whether to support the voice service, the terminal device may determine that the voice service is not supported if the first network does not support the voice service, or if the terminal device does not support the voice service based on the first network.
For example, in the present application, if the first network is a 5G network, if the terminal device or the first network does not support voice service over 5G, that is, the terminal device does not support VoNR, or the first network does not support VoNR, the terminal device may determine that the voice service is not supported.
Further, in an embodiment of the present application, if it is determined that the voice service is not supported, the terminal device may send a fallback request to the network device of the first network. Wherein the fallback request may characterize a request to fall back from the first network to the second network.
For example, in this application, if the first network is a 5G network, the terminal device may send the fallback request to the network device of the first network through triggering of the EPS fallback. Wherein the NR voice service using EPS Fallback enables the UE to set up VOLTE call from NG-RAN Fallback to LTE during call setup through one triggering mechanism. The trigger mechanism is initiated for several reasons, for example, the UE or the network may be triggered without the capability and function of the VoNR, or the UE or the network may be initiated with a temporary lack of coverage in the NR, or the like, but may also be triggered from the NG-RAN side by manually forced configuration.
Further, in the embodiment of the present application, the manner in which the terminal device detects the voice service on the first network may be that the terminal device initiates the voice service on the first network; the voice service may also be received on the first network for a terminal device.
That is to say, in the present application, the voice service detected by the terminal device on the first network may be a calling service, that is, the terminal device initiates a call request to another terminal; the service may also be called service, that is, the terminal device receives a call request initiated by another terminal.
Further, in the embodiment of the present application, if it is determined that the voice service is not supported, the terminal device may start the timer while sending the fallback request to the network device of the first network, or the terminal device may start the timer after sending the fallback request to the network device of the first network, so as to respond to whether the fallback indication issued by the network device can be received within the running time of the timer.
It is understood that, in the embodiment of the present application, the terminal device may be referred to as a User Equipment (UE). The Terminal device may be a Personal Communication Service (PCS) phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) Station, a Personal Digital Assistant (PDA), or the like, and may also be a smart phone, a tablet computer, a palm computer, a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), or the like, and the Terminal device may communicate with one or more Network devices through a Radio Access Network (RAN). The terminal equipment may be, for example, a mobile telephone (or so-called "cellular" telephone) or a computer with terminal equipment, etc., and may also be, for example, a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device that exchanges voice and/or data with the radio access network. The terminal device may also be a handheld device with a wireless communication function, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a network evolving in the future, and the like, and the implementation of the present application is not limited.
It should be noted that, in the embodiment of the present application, the network device is a device for providing a wireless communication function for the terminal device, and includes but is not limited to: an evolved Node B (eNB or e-NodeB) in a Long-Term Evolution (Long-Term Evolution, LTE) system, a New air interface (NR) system or an authorized-Assisted Access Long-Term Evolution (LAA-LTE) system, a macro Base Station, a micro Base Station (also referred to as a "small Base Station"), a pico Base Station, a Base Transceiver Station (BTS), a Base Band Unit (BBU), an Access Point (Access Point, AP), a Transmission Point (TP), a New generation Node B (g-NodeB), and the like.
And 102, if the return instruction sent by the network equipment is not received within the running time of the timer, executing network searching processing to obtain the measurement information of the second network.
In the embodiment of the application, after the terminal device sends the return request to the network device and starts the timer, if the return instruction sent by the network device of the first network is not received within the running time of the timer, the terminal device may directly execute the network searching process, so that the measurement information of the second network may be obtained.
It should be noted that, in the embodiment of the present application, the first network and the second network are two different networks. The first network may be a network that does not support voice services, and the second network may be a network that supports voice services.
Optionally, in this application, the network speed of the first network is faster than that of the second network, for example, the first network may be a 5G network and the second network may be a 4G network.
Alternatively, in the present application, the first network may be a higher-level network, and the second network may be a network lower by one or more levels than the first network. For example, the first network may be a 4G network, and the second network may be a 3G network or a 2G network.
Further, in this embodiment of the present application, the terminal device may reside in the first network first, and if it is determined that the voice service is not supported, after the voice service is detected on the first network, the terminal device needs to return to the second network to perform the voice service, so that the terminal device may send a return request to the network device of the first network, and meanwhile, to ensure that the terminal device may successfully return to the second network to perform the voice service, the terminal device may further start a timer, and monitor whether a return instruction issued by the network device can be received within a running time of the timer.
It is understood that, in the embodiment of the present application, the terminal device may set the running time of the timer in advance. Wherein, the running time of the timer is the Trigger time To Trigger of the timer. In particular, the terminal device may set the running time of the timer according to network parameters of the first network. For example, the terminal device may set the running time of the timer To be 2s according To the signal strength of the first network, that is, time To Trigger =2s.
For example, in the present application, the return indication may include a redirection indication or a handover indication. The redirection instruction refers to an instruction of changing a serving cell when the terminal device is in a connected state, belongs to inter-system interoperation, carries target cell information through an RRC release message, and initiates access again according to the target cell information. The switching indication indicates that the terminal device is switched from the source cell to the target cell through a switching process, wherein resource application, data forwarding and the like can be performed between the source cell and the target cell.
And 103, returning to the second network according to the measurement information so as to perform voice service on the second network.
In the embodiment of the application, if a return instruction issued by the network device of the first network is not received within the running time of the timer, the terminal device may return to the second network according to the measurement information after performing the network searching process to obtain the measurement information of the second network, so that the voice service may be performed on the second network.
It should be noted that, in the embodiment of the present application, the measurement information of the second network obtained by the terminal device searching for the network may include network information used for indicating the second network. Specifically, in this application, the measurement information may include indicated frequency point or cell information corresponding to the second network.
Therefore, in the embodiment of the application, after the terminal device sends the return request to the network device of the first network, even if the terminal device cannot receive the return indication sent by the network device due to network failure and other reasons, the terminal device can successfully return to the second network in an active network searching manner, and perform the voice service on the second network, so that the successful establishment of the voice service can be ensured.
Further, in an embodiment of the present application, fig. 3 is a schematic diagram of an implementation flow of a fallback method for a voice service proposed in the embodiment of the present application, as shown in fig. 3, when a voice service is detected on a first network, if it is determined that the voice service is not supported, a fallback request is sent to a network device, and after a timer is started, that is, after step 101, a method for a terminal device to fallback the voice service may further include the following steps:
and step 104, if a return instruction sent by the network equipment is received within the running time of the timer, returning to the third network according to the network information carried by the return instruction so as to perform voice service on the third network.
In the embodiment of the present application, after the terminal device sends a return request to the network device and starts the timer, if a return instruction sent by the network device of the first network is received within the running time of the timer, the terminal device may directly return to the third network according to the network information carried by the return instruction, so that the voice service may be performed on the third network.
It should be noted that, in the embodiment of the present application, the first network and the third network are two different networks. The first network may be a network that does not support voice services, and the third network may be a network that supports voice services.
Optionally, in this application, the network speed of the first network is faster than that of the third network, for example, the first network may be a 5G network, and the third network may be a 4G network.
Alternatively, in the present application, the first network may be a higher-level network, and the third network may be a network lower than the first network by one or more levels. For example, the first network may be a 4G network, and the third network may be a 3G network or a 2G network.
Optionally, in this application, the second network and the third network may be the same or different.
Further, in the embodiment of the present application, the terminal device sends the return request to the network device of the first network and starts the timer, so as to monitor whether the return instruction sent by the network device can be received within the running time of the timer. Specifically, if a return instruction sent by the network device of the first network is received within the running time of the timer, the terminal device may successfully return to the third network based on the network information carried by the return instruction, and perform the voice service in the third network.
It can be understood that, in the present application, the return indication sent by the network device of the first network carries the indicated frequency point or cell information, that is, the return indication includes network information used for indicating the third network.
Further, in the embodiment of the present application, the return indication issued by the network device of the first network may be used to instruct the terminal device to switch from the first network to the third network.
For example, in the present application, the return indication may include a redirection indication or a handover indication. The redirection instruction refers to an instruction for changing a serving cell when the terminal device is in a connected state, and belongs to inter-system interoperation, target cell information is carried through an RRC release message, and the terminal device re-initiates access according to the target cell information. The switching indication indicates that the terminal device is switched from the source cell to the target cell through a switching process, wherein resource application, data forwarding and the like can be performed between the source cell and the target cell.
Optionally, in this embodiment of the present application, if the return instruction sent by the network device of the first network is a redirection instruction, the terminal device may return the network information of the third network carried by the redirection instruction from the first network to the third network according to the redirection instruction, so that the voice service may be performed on the second network.
Optionally, in an embodiment of the present application, if the return indication sent by the network device of the first network is a switching indication, the terminal device may switch from the first network to the third network according to the network information of the third network carried by the switching indication, so that a voice service may be performed on the third network.
It is to be understood that in embodiments of the present application, the third network may be a network supporting voice services. For example, if the third network is a 4G network, the terminal device and the third network support VoLTE.
Therefore, in the embodiment of the present application, after the terminal device sends the return request to the network device of the first network, whether the return instruction issued by the network device can be received or not, the terminal device can fall back to the second network or the third network, and perform the voice service on the second network or the third network, thereby ensuring the successful establishment of the voice service.
Further, in an embodiment of the present application, fig. 4 is a schematic view of a third implementation flow of a fallback method for a voice service provided in the embodiment of the present application, as shown in fig. 4, after the fallback to the second network according to the measurement information so as to perform the voice service on the second network, that is, after step 103, or if a fallback instruction sent by the network device is received within the running time of the timer, network information carried by the fallback instruction is reverted to a third network, so that after the voice service is performed on the third network, that is, after step 104, the method for the terminal device to perform the voice service fallback may further include the following steps:
step 105, after the voice service is completed, returning to the first network.
In the embodiment of the application, the terminal device may select to return to the first network after returning to the second network for the voice service according to the measurement information obtained by network search, or after returning to the third network for the voice service according to the network information carried by the return instruction and after completing the voice service.
Specifically, in the embodiment of the present application, after determining that the voice service is completed, the terminal device may return to the first network through reselection or fast return (fast return). Wherein, the reselection is a change of a serving cell when the terminal device is in an idle state, and may be intra-system or inter-system; the fast return function may include two parts, a "fast forward" at call initiation and a "fast backward" after call termination.
Further, in an embodiment of the present application, fig. 5 is a schematic view illustrating an implementation flow of a fallback method for a voice service proposed in the embodiment of the present application, as shown in fig. 5, when a voice service is detected on a first network, if it is determined that the voice service is not supported, a fallback request is sent to a network device, and after a timer is started, that is, after step 101, and before the terminal device reverts to a second network according to the measurement information to perform the voice service on the second network, that is, before step 103, the method for the terminal device to perform the voice service fallback may further include the following steps:
and step 106, if the return instruction sent by the network equipment is not received within the running time of the timer, judging whether the preset network searching condition is met.
And step 107, if the preset network searching condition is met, executing network searching processing to obtain the measurement information of the second network.
In the embodiment of the present application, when the terminal device resides in the first network, if a voice service is detected on the first network, after determining that the voice service is not supported, the terminal device may start the timer while sending the return request to the network device of the first network, or the terminal device may start the timer after sending the return request to the network device of the first network, so as to respond to whether a return instruction issued by the network device can be received within the running time of the timer.
Further, in the embodiment of the present application, after the terminal device sends the return request to the network device and starts the timer, if the return instruction issued by the network device of the first network is not received within the running time of the timer, the terminal device may first determine whether the preset network searching condition is met, and execute the network searching process after determining that the preset network searching condition is met.
It should be noted that, in the embodiment of the present application, the preset network searching condition is used to determine whether a network supporting a voice service needs to be fallback within a shortest time to perform the voice service.
Specifically, in the embodiment of the present application, when determining whether a preset network searching condition is satisfied, if it is determined that the ring state of the voice service is entered, the terminal device may determine that the preset network searching condition is satisfied; or, if it is determined that the call state of the voice service is entered, the terminal device may determine that the preset network searching condition is satisfied.
Further, in the present application, after determining whether the preset network searching condition is satisfied, if it is determined that the preset network searching condition is satisfied, the terminal device may determine that the terminal device needs to fall back to another network for a voice service in a shortest time, and therefore, the terminal device does not continue to wait for a return instruction issued by the network device, but selects to execute network searching processing, and obtains the measurement information of the second network.
Therefore, in the embodiment of the application, even if the terminal device cannot receive the return indication issued by the network device due to network faults and the like, the terminal device can successfully return to the second network in an active network searching mode when the preset network searching condition is met, and voice service is performed on the second network, so that the successful establishment of the voice service can be ensured.
Further, in an embodiment of the present application, fig. 6 is a schematic view illustrating an implementation flow of a return method for a voice service provided in the embodiment of the present application, as shown in fig. 6, if a return instruction issued by the network device is not received within the running time of the timer, the method for the terminal device to return the voice service may further include the following steps after determining whether a preset network searching condition is met, that is, after step 106:
and step 108, if the preset network searching condition is judged not to be met, restarting the timer, and continuing to execute the monitoring processing of whether the return instruction is received within the running time of the timer.
In the embodiment of the application, after the terminal device determines whether the preset network searching condition is met, if it is determined that the preset network searching condition is not met, the terminal device may select to restart the timer, and may further continue to perform the monitoring process of whether the return indication is received within the running time of the timer.
Further, in the present application, after determining whether the preset network searching condition is satisfied, if it is determined that the preset network searching condition is not satisfied, the terminal device may determine that the terminal device does not need to fall back to another network for performing a voice service in the shortest time, and therefore may select to continue to wait for a return instruction issued by the network device. Specifically, the terminal device may restart the timer, then continue to monitor whether the return instruction issued by the network device of the first network is received within the running time of the timer, and may respond whether the return instruction issued by the network device is received within the running time of the timer.
That is to say, in the present application, after it is determined that the preset network searching condition is not satisfied, the terminal device may restart the timer, and if a return instruction issued by the network device of the first network is received within the running time of the timer, the terminal device may respond to the return instruction, fall back to the third network, and perform a voice service on the third network; if the return indication sent by the network equipment of the first network is not received within the running time of the timer, the terminal equipment can select to directly perform network searching processing so as to return to the second network and perform voice service on the second network; or, if the return instruction issued by the network device of the first network is not received within the running time of the timer, the terminal device may continue to determine whether the preset network searching condition is satisfied, and further execute the subsequent process according to the determination result.
In summary, in the embodiment of the present application, by the voice service returning method provided in steps 101 to 108, in the EPS fallback call process, the tepsfailback protection timer is started, and if the timer is overtime, the terminal can autonomously fall back the LTE to establish the VoLTE call, so that the problem that the terminal side cannot fall back 4G in abnormal scenes such as B1 missing at the network side can be effectively solved, and the EPS fallback call experience of the 5G terminal device can be effectively improved.
It can be understood that, in the present application, no matter what reason the terminal device cannot receive the return indication (the network device does not issue the return indication, or the terminal does not receive the return indication issued by the network device) within the running time of the timer, the terminal device can autonomously fall back to other networks for performing the voice service through the network searching process, thereby ensuring the successful establishment of the voice service and improving the reliability of the voice service.
It should be noted that, the voice service returning method provided by the present application, aiming at the problem that the terminal side cannot fall back to the LTE due to the missed network side B1 measurement event in the EPS fallback call establishment procedure, enables the terminal to independently fall back to the LTE network by setting the protection timer Tepsfallback, improves the call experience of the 5G terminal device, and after the call is finished, the terminal device may return to the 5G network by reselection or independent fast return.
Further, according to the voice service returning method provided by the application, for a call establishment blocked scene caused by various abnormalities in a call establishment process, terminal equipment can be considered to be optimized by adding a protection timer, so that the successful establishment of the voice service is ensured. That is to say, the method for returning the voice service provided by the present application is not limited to the EPS fallback call flow, and may also be applied to other call flows such as 2G/3G/4G/5G.
The embodiment of the application provides a voice service returning method, when a voice service is detected on a first network, if the voice service is determined not to be supported, a returning request is sent to network equipment, and a timer is started; if the return instruction sent by the network equipment is not received within the running time of the timer, executing network searching processing to obtain the measurement information of the second network; and returning to the second network according to the measurement information so as to carry out voice service on the second network. Therefore, in the embodiment of the application, in the EPS fallback communication process, the terminal device can start the tepsfailback protection timer, and when the timer is overtime and does not receive a fallback indication sent by the network device, the terminal device selects the autonomous fallback LTE to establish the VoLTE communication, so that the problem that the terminal device cannot fallback 4G due to the fact that the terminal device does not receive the fallback indication in an abnormal scene can be effectively solved, successful establishment of a voice service can be guaranteed, and reliability of the voice service is improved.
Based on the foregoing embodiment, another embodiment of the present application provides a method for returning a voice service, which may be an EPS fallback session optimization scheme. Specifically, when the terminal device performs a voice service on the 5G network, the terminal device actively starts a timer tepsfailback, and if the timer is overtime, the terminal device does not obtain a command instruction for redirecting or switching to the 4G network issued by the network device, and the terminal device can actively search the LTE network to continue the voice service after falling back to the LTE, so that a call setup failure caused by the fact that an EPS fallback flow cannot trigger the falling back is prevented.
Further, in an embodiment of the present application, fig. 7 is a schematic diagram illustrating an implementation flow of a fallback method for a voice service according to the embodiment of the present application, and as shown in fig. 7, the method for a terminal device to fallback the voice service may include the following steps:
step 201, when voice service is detected on the 5G network, judging whether VoNR is supported; if so, go to step 202, otherwise go to step 203.
In the embodiment of the application, the voice service detected by the terminal device on the 5G network may be a calling service, that is, the terminal device initiates a call request to other terminals; the service may also be called service, that is, the terminal device receives a call request initiated by another terminal.
Further, in the present application, if the terminal device or the network does not support the voice service over 5G, that is, the terminal device does not support the VoNR, or the first network does not support the VoNR, the terminal device may determine that the VoNR is not supported.
Step 202, performing voice service on the 5G network.
Step 203, sending a return request to the network device, and starting a timer.
In the embodiment of the application, if the terminal device determines that the terminal device does not support the VoNR, the terminal device may send a fallback request to a network device of the 5G network, and may also start a timer.
Further, in the embodiment of the present application, if it is determined that the voice service is not supported, the terminal device may start the timer while sending the fallback request to the network device of the 5G network, or the terminal device may start the timer after sending the fallback request to the network device of the 5G network, so as to respond to whether the fallback indication sent by the network device can be received within the running time of the timer.
And step 204, judging whether a return instruction sent by the network equipment is received within the running time of the timer, if so, executing step 205 and step 206, otherwise, executing step 207.
And step 205, responding to the return indication, returning to the LTE network, and establishing the VoLTE call on the LTE network.
And step 206, stopping the timer.
And step 207, executing network searching processing to obtain the measurement information of the LTE network.
In the embodiment of the application, after the terminal device sends the return request to the network device and starts the timer, if the return instruction issued by the network device of the 5G network is not received within the running time of the timer, the terminal device may directly perform the network searching process to actively search the LTE network, so as to obtain the measurement information of the LTE network.
And step 208, falling back to the LTE network, and establishing the VoLTE call on the LTE network.
In the embodiment of the application, after the terminal device executes the network searching process to obtain the measurement information of the LTE network, the terminal device can return to the LTE network according to the measurement information, so that the voice service can be performed on the LTE network.
Therefore, according to the voice service returning method provided by the application, even if the terminal equipment cannot receive the returning indication sent by the network equipment due to network faults and the like after the terminal equipment sends the returning request to the network equipment of the 5G network, the terminal equipment can successfully fall back to the LTE network in an active network searching mode and performs the voice service on the LTE network, so that the successful establishment of the voice service can be ensured.
Further, in an embodiment of the present application, fig. 8 is a seventh implementation flow diagram of a voice service fallback method provided in the embodiment of the present application, and as shown in fig. 8, the method for the terminal device to fallback the voice service may include the following steps:
step 201, when voice service is detected on the 5G network, judging whether VoNR is supported; if so, go to step 202, otherwise go to step 203.
Step 202, performing voice service on the 5G network.
Step 203, sending a return request to the network device, and starting a timer.
And step 204, judging whether a return instruction sent by the network equipment is received within the running time of the timer, if so, executing step 205 and step 206, otherwise, executing step 209.
And 205, responding to the return instruction, returning to the LTE network, and establishing the VoLTE call on the LTE network.
Step 206, stop the timer.
Step 209, judging whether preset network searching conditions are met; if so, step 207 is performed, otherwise step 210 is performed.
In the embodiment of the application, after the terminal device sends the return request to the network device and starts the timer, if the return instruction issued by the network device of the 5G network is not received within the running time of the timer, the terminal device may first determine whether the preset network searching condition is met, and execute the network searching process after determining that the preset network searching condition is met.
In an embodiment of the present application, when determining whether a preset network searching condition is satisfied, if it is determined that the ring state of the voice service is entered, the terminal device may determine that the preset network searching condition is satisfied; or, if it is determined that the call state of the voice service is entered, the terminal device may determine that the preset network searching condition is satisfied.
And step 210, restarting the timer, and jumping to the step 204.
In the embodiment of the application, after the terminal device determines whether the preset network searching condition is met, if it is determined that the preset network searching condition is not met, the terminal device may select to restart the timer, and may further continue to perform the monitoring process of whether the return indication is received within the running time of the timer.
And step 207, executing network searching processing to obtain the measurement information of the LTE network.
And step 208, falling back to the LTE network, and establishing the VoLTE call on the LTE network.
Therefore, even if the terminal device cannot receive the return indication issued by the network device due to network faults and the like, the terminal device can successfully return to the second network in an active network searching mode when the preset network searching conditions are met, and voice service is performed on the second network, so that successful establishment of the voice service can be ensured.
Further, in an embodiment of the present application, fig. 9 is an eighth implementation flow diagram of a method for returning a voice service provided in the embodiment of the present application, and as shown in fig. 9, the method for returning the voice service by a terminal device may include the following steps:
step 201, when voice service is detected on a 5G network, judging whether VoNR is supported; if so, go to step 202, otherwise go to step 203.
Step 202, voice service is carried out on the 5G network.
Step 203, sending a return request to the network device, and starting a timer.
Step 2011, determining whether a return instruction sent by the network device is received, if yes, executing step 205 and step 206, otherwise executing step 2012.
And step 205, responding to the return indication, returning to the LTE network, and establishing the VoLTE call on the LTE network.
Step 206, stop the timer.
Step 2012, determining whether the timer is overtime, if yes, executing step 207, otherwise, jumping to step 2011.
In the embodiment of the present application, after sending the retraction request to the network device and starting the timer, if the loop from step 2011 to step 2012 is repeatedly executed until a retraction instruction issued by the network device of the 5G network is received within the running time of the timer or the timer expires.
And step 207, executing network searching processing to obtain the measurement information of the LTE network.
And step 208, falling back to the LTE network, and establishing the VoLTE call on the LTE network.
That is to say, in the present application, after the voice service is initiated, the terminal device starts the timer Tepsfallback, and the running time of the timer may be set according to the network condition, for example, the terminal device sets the running time of the timer to 5s. If the terminal device still does not receive the redirection instruction or the switching instruction issued by the network device after the TepsFallback is overtime, the terminal device can actively search the LTE network and actively drop the LTE to continue the voice service. If the terminal device has received the redirection instruction or the switching instruction issued by the network device before the Tepsfallback time-out, the terminal device may reside the frequency point or the cell information indicated by the network device according to the standard protocol flow, and continue the voice service.
Therefore, according to the voice service returning method provided by the application, even if the terminal equipment cannot receive the returning indication sent by the network equipment due to network faults and the like after the terminal equipment sends the returning request to the network equipment of the 5G network, the terminal equipment can successfully return to the LTE network in an active network searching mode and perform the voice service on the LTE network, so that the successful establishment of the voice service can be ensured.
The embodiment of the application provides a voice service returning method, when a voice service is detected on a first network, if the voice service is determined not to be supported, a returning request is sent to network equipment, and a timer is started; if the return instruction sent by the network equipment is not received within the running time of the timer, executing network searching processing to obtain the measurement information of the second network; and returning to the second network according to the measurement information so as to carry out voice service on the second network. Therefore, in the embodiment of the application, in the EPS fallback communication process, the terminal device can start the tepsfailback protection timer, and when the timer is overtime and does not receive the return indication sent by the network device, the terminal device selects the autonomous fallback LTE to establish the VoLTE communication, so that the problem that the terminal device cannot fallback 4G due to the fact that the terminal device does not receive the return indication in an abnormal scene can be effectively solved, the successful establishment of the voice service can be ensured, and the reliability of the voice service is improved.
Based on the foregoing embodiments, in another embodiment of the present application, fig. 10 is a schematic diagram of a composition structure of a terminal device according to an embodiment of the present application, as shown in fig. 10, the terminal device 10 according to an embodiment of the present application may include a sending unit 11, an initiating unit 12, an executing unit 13, a returning unit 14,
the sending unit 11 is configured to, when a voice service is detected on a first network, send a return request to a network device if it is determined that the voice service is not supported;
the starting unit 12 is configured to start a timer;
the execution unit 13 is configured to execute a network searching process to obtain measurement information of a second network if a return instruction issued by the network device is not received within the running time of the timer;
the returning unit 14 is configured to return to the second network according to the measurement information, so as to perform the voice service on the second network.
Further, in an embodiment of the present application, the returning unit 14 is further configured to, when a voice service is detected on the first network, send a return request to a network device if it is determined that the voice service is not supported, start a timer, and return to a third network according to network information carried in the return instruction if a return instruction sent by the network device is received within a running time of the timer, so as to perform the voice service on the third network.
Further, in the embodiment of the present application, the terminal device 10 may further include a detection unit 15,
the detecting unit 15 is configured to initiate the voice service on the first network; or, receiving the voice service over the first network.
Further, in an embodiment of the present application, the first network is a 5G network, the second network is a 4G network, and the third network is a 4G network; or, the first network is a 4G network, the second network is a 3G network or a 2G network, and the third network is a 3G network or a 2G network.
Further, in an embodiment of the present application, the return indication includes a redirection indication or a handover indication.
Further, in the embodiment of the present application, the terminal device 10 may further include a judging unit 16,
the determining unit 16 is configured to, when a voice service is detected on a first network, send a return request to a network device if it is determined that the voice service is not supported, start a timer, and return to the second network according to the measurement information, so as to determine whether a preset network search condition is satisfied if a return instruction issued by the network device is not received within an operation time of the timer before the voice service is performed on the second network;
the executing unit 13 is further configured to execute network searching processing to obtain the measurement information of the second network if it is determined that the preset network searching condition is met.
Further, in an embodiment of the present application, the determining unit 16 is specifically configured to determine that the preset network searching condition is met if the ring state of the voice service is entered; and/or judging that the preset network searching condition is met if the voice service enters the call state.
Further, in an embodiment of the present application, the starting unit 12 is further configured to, if a return instruction issued by the network device is not received within an operation time of the timer, determine whether a preset network searching condition is met, and if it is determined that the preset network searching condition is not met, restart the timer;
the execution unit 13 is further configured to continue to execute the monitoring process of whether the retraction instruction is received within the running time of the timer.
Further, in the embodiment of the present application, the terminal device 10 may further include a return unit 17,
the returning unit 17 is configured to return to the first network after the voice service is completed.
In an embodiment of the present application, further, fig. 11 is a schematic diagram of a composition structure of a terminal device provided in the embodiment of the present application, as shown in fig. 11, the terminal device 10 provided in the embodiment of the present application may further include a processor 18 and a memory 19 storing executable instructions of the processor 18, and further, the terminal device 10 may further include a communication interface 110, and a bus 111 for connecting the processor 18, the memory 19, and the communication interface 110.
In an embodiment of the present Application, the Processor 18 may be at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a ProgRAMmable Logic Device (PLD), a Field ProgRAMmable Gate Array (FPGA), a Central Processing Unit (CPU), a controller, a microcontroller, and a microprocessor. It is understood that the electronic device for implementing the above processor function may be other electronic devices, and the embodiments of the present application are not limited in particular. The terminal device 10 may further comprise a memory 19, which memory 19 may be connected to the processor 18, wherein the memory 19 is adapted to store executable program code comprising computer operating instructions, and wherein the memory 19 may comprise a high speed RAM memory and may further comprise a non-volatile memory, such as at least two disk memories.
In the embodiment of the present application, the bus 111 is used to connect the communication interface 110, the processor 18, and the memory 19 and the intercommunication among these devices.
In the embodiments of the present application, the memory 19 is used for storing instructions and data.
Further, in an embodiment of the present application, the processor 18 is configured to, when a voice service is detected on a first network, send a return request to a network device if it is determined that the voice service is not supported, and start a timer; if the return instruction sent by the network equipment is not received within the running time of the timer, executing network searching processing to obtain the measurement information of a second network; and returning to the second network according to the measurement information so as to perform the voice service on the second network.
In practical applications, the Memory 19 may be a volatile Memory (volatile Memory), such as a Random-Access Memory (RAM); or a non-volatile Memory (non-volatile Memory), such as a Read-Only Memory (ROM), a flash Memory (flash Memory), a Hard Disk (Hard Disk Drive, HDD) or a Solid-State Drive (SSD); or a combination of the above types of memories and provides instructions and data to the processor 18.
In addition, each functional module in this embodiment 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 integrated unit can be realized in a form of hardware or a form of a software functional module.
Based on the understanding that the technical solution of the present embodiment essentially or a part contributing to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, and include several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method of the present embodiment. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The embodiment of the application provides a terminal device, when a voice service is detected on a first network, if the voice service is determined not to be supported, a return request is sent to the network device, and a timer is started; if the return instruction sent by the network equipment is not received within the running time of the timer, executing network searching processing to obtain the measurement information of the second network; and returning to the second network according to the measurement information so as to carry out voice service on the second network. Therefore, in the embodiment of the application, in the EPS fallback communication process, the terminal device can start the tepsfailback protection timer, and when the timer is overtime and does not receive the return indication sent by the network device, the terminal device selects the autonomous fallback LTE to establish the VoLTE communication, so that the problem that the terminal device cannot fallback 4G due to the fact that the terminal device does not receive the return indication in an abnormal scene can be effectively solved, the successful establishment of the voice service can be ensured, and the reliability of the voice service is improved.
An embodiment of the present application provides a computer-readable storage medium, on which a program is stored, and when the program is executed by a processor, the program implements the method for returning a voice service as described above.
Specifically, the program instructions corresponding to the retraction method of a voice service in this embodiment may be stored on a storage medium such as an optical disc, a hard disc, a usb disk, etc., and when the program instructions corresponding to the retraction method of a voice service in the storage medium are read or executed by an electronic device, the method includes the following steps:
when voice service is detected on a first network, if the voice service is determined not to be supported, sending a return request to network equipment, and starting a timer;
if a return instruction issued by the network equipment is not received within the running time of the timer, network searching processing is executed to obtain measurement information of a second network;
and returning to the second network according to the measurement information so as to perform the voice service on the second network.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of implementations of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart block or blocks and/or flowchart block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart block or blocks for implementing the flowchart block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks in the flowchart and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application.

Claims (11)

1. A method for fallback to voice traffic, the method comprising:
when voice service is detected on a first network, if the voice service is determined not to be supported, sending a return request to network equipment, and starting a timer;
if the return instruction sent by the network equipment is not received within the running time of the timer, executing network searching processing to obtain the measurement information of a second network;
returning to the second network according to the measurement information to perform the voice service on the second network;
and if a return instruction sent by the network equipment is received within the running time of the timer, returning to a third network according to network information carried by the return instruction so as to perform the voice service on the third network.
2. The method of claim 1, wherein detecting voice traffic on the first network comprises:
initiating the voice service on the first network; alternatively, the first and second liquid crystal display panels may be,
the voice traffic is received over the first network.
3. The method of claim 1,
the first network is a 5G network, the second network is a 4G network, and the third network is a 4G network; alternatively, the first and second liquid crystal display panels may be,
the first network is a 4G network, the second network is a 3G network or a 2G network, and the third network is a 3G network or a 2G network.
4. The method of claim 1,
the fallback indication comprises a redirection indication or a handover indication.
5. The method according to any of claims 1-4, wherein when voice traffic is detected on the first network, if it is determined that the voice traffic is not supported, sending a fallback request to a network device, and after starting a timer, and before the fallback to the second network according to the measurement information to perform the voice traffic on the second network, the method further comprises:
if a return instruction issued by the network equipment is not received within the running time of the timer, judging whether a preset network searching condition is met;
and if the preset network searching condition is judged to be met, executing network searching processing to obtain the measurement information of the second network.
6. The method according to claim 5, wherein the determining whether the preset web searching condition is satisfied comprises:
if the ringing state of the voice service is entered, judging that the preset network searching condition is met; and/or the presence of a gas in the gas,
and if the voice service enters the call state, judging that the preset network searching condition is met.
7. The method according to claim 5, wherein if a return instruction issued by the network device is not received within a running time of the timer, after determining whether a preset network searching condition is satisfied, the method further comprises:
and if the preset network searching condition is judged not to be met, restarting the timer, and continuing to execute monitoring processing of whether the return instruction is received within the running time of the timer.
8. The method of claim 1, further comprising:
returning to the first network after the voice service is completed.
9. A terminal device, characterized in that the terminal device comprises: a sending unit, a starting unit, an executing unit, a returning unit,
the sending unit is configured to send a return request to the network device if it is determined that the voice service is not supported when the voice service is detected on the first network;
the starting unit is used for starting a timer;
the execution unit is configured to execute network searching processing to obtain measurement information of a second network if a return instruction issued by the network device is not received within the running time of the timer;
the returning unit is configured to return to the second network according to the measurement information, so as to perform the voice service on the second network;
the returning unit is further configured to, when the voice service is detected on the first network, send the return request to the network device if it is determined that the voice service is not supported, and after the timer is started, return to a third network according to network information carried by the return instruction if the return instruction sent by the network device is received within an operation time of the timer, so as to perform the voice service on the third network.
10. A terminal device, characterized in that the terminal device comprises a processor, a memory storing instructions executable by the processor, which instructions, when executed by the processor, implement the method according to any one of claims 1-8.
11. A computer-readable storage medium, on which a program is stored, which, when being executed by a processor, carries out the method according to any one of claims 1 to 8.
CN202110597463.0A 2021-05-31 2021-05-31 Voice service returning method, terminal equipment and storage medium Active CN113329355B (en)

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