WO2018040959A1

WO2018040959A1 - Voice service processing method, terminal equipment, and computer storage medium

Info

Publication number: WO2018040959A1
Application number: PCT/CN2017/098162
Authority: WO
Inventors: 汪志成
Original assignee: 深圳市万普拉斯科技有限公司
Priority date: 2016-09-05
Filing date: 2017-08-18
Publication date: 2018-03-08
Also published as: CN106341803A

Abstract

The embodiments of the invention disclose a voice service processing method, terminal equipment, and a computer storage medium. The method comprises: initiating, by terminal equipment camping on an LTE network, and by transmitting an ESR, a voice service call; receiving a downlink signal transmitted from network equipment and carrying information of a target frequency and a neighboring frequency configured for a 2G/3G network; if the terminal equipment receives an indication indicating network congestion and is unable to fall back on the target frequency, detecting, on the basis of the information of the neighboring frequency, a neighboring frequency having signal quality satisfying a preconfigured criterion; camping, by the terminal equipment, on a neighboring network corresponding to the frequency having the signal quality satisfying the preconfigured criterion; and initiating again, by the terminal equipment at the neighboring network, a voice service request.

Description

Voice service processing method, terminal device and computer storage medium

Cross-reference to related applications

The present application is filed on the basis of the Chinese Patent Application Serial No. PCT Application Serial No.

Technical field

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

Background technique

Since Long Term Evolution (LTE) is a network standard that only supports data domains, when a mobile phone needs to use voice telephony, there are usually two solutions, one is based on IP bearer voice (Voice over IP, VoIP). The VoLTE (Voice over LTE) technology, another method is to use the Circuit Switched Domain Fall Back (CSFB) technology to make the mobile phone fall back to the 2G/3G network supporting the circuit domain.

The former VoIP-based Volte technology is still in its infancy, and many areas are not yet commercially available. At present, most of the time when using the LTE mobile phone to make a call, the second solution is still used, and the CSFB technology is used to fall back to the 2G/3G network for the call.

The circuit domain fallback enables the terminal device to initiate a CS (Circuit Switched) service under LTE access, receive paging of CS services such as voice, and can perform ongoing grouping on the terminal under LTE system access. The exchange (PS, Packet Switch) service is processed correctly. In the CSFB technology, in the dual coverage areas of LTE and 2G/3G, for voice services, the terminal equipment can trigger the fallback from LTE access to 2G/3G network access and perform CS services.

In the prior art, when the user equipment is located in an overlapping coverage area of a network such as 2G, 3G, and LTE, the terminal passes the voice calling or voice paging to the mobility management entity (MME, Mobility Management Entity) under the LTE network. The LTE base station sends an extended service request (Extended Service Request) to the LTE network, so that the LTE network learns that the terminal device needs to perform circuit domain service, and the LTE network instructs the terminal to fall back to the 2G network or the 3G network, and when the terminal falls back to the 2G network or the 3G network. Then, an access request is initiated to the mobile exchange center (MSC, Mobile Switch Centre), and the MSC determines whether to allow the terminal to initiate circuit domain services according to the priority of the terminal user and its own system load state; when the terminal is allowed to access, the terminal Perform network switching. If the circuit domain system is overloaded and allowed to be rejected at this time, the network handover fails, resulting in the final call failure, and may also cause the re-dialing call to fail, resulting in a poor user experience.

Summary of the invention

The embodiment of the present invention is to provide a voice service processing method, a terminal device, and a computer storage medium, which can effectively improve the call rate of the terminal device and improve the user experience.

An embodiment of the present invention provides a voice service processing method, where the method includes:

The user equipment (UE, User Equipment) residing in the LTE network initiates a voice service call by sending an Extended Service Request (ESR);

Receiving a downlink signal sent by the network side device, where the downlink signal carries information of a target frequency point and a neighboring frequency point of the configured 2G/3G network;

If the terminal device receives the indication information of the network congestion and cannot fall back to the target frequency point, searching for the frequency of the neighboring area signal quality that meets the preset condition based on the information of the neighboring area frequency point;

The terminal resides in a neighboring cell network corresponding to a frequency point where the signal quality of the neighboring area meets a preset condition;

The terminal device initiates a voice service request again in the neighboring cell network.

In an embodiment, the indication information of the network congestion is used to indicate that the circuit domain core network is congested.

In an embodiment, the preset condition is that a Reference Signal Received Power (RSRP) value is greater than a preset threshold or the RSRP is the largest among all neighboring frequency points.

In an embodiment, if the target frequency point is a frequency point of the 2G network, the terminal device searches for the 3G network when the terminal device receives the indication information of the network congestion and cannot fall back to the target frequency point. The signal quality of the neighboring area meets the preset condition.

In an embodiment, if the target frequency point is a frequency point of the 3G network, the terminal device searches for the 2G network when the terminal device receives the indication information of the network congestion and cannot fall back to the target frequency point. The signal quality of the neighboring area meets the preset condition.

The embodiment of the invention further provides a terminal device, including a search module, a sending module and a receiving module;

The search module is configured to search for an LTE network when camping on and camp on the LTE network;

The sending module is configured to initiate a voice service call by sending an ESR;

The receiving module is configured to receive a downlink signal sent by the network side device, where the downlink signal carries information about a target frequency point and a neighboring frequency point of the configured 2G/3G network;

The search module is further configured to: if the terminal device receives the indication information of the network congestion and cannot fall back to the target frequency point, the signal quality of the neighboring area is searched based on the information of the neighboring frequency point received by the receiving module. a frequency point of a preset condition to reside at a frequency point where the signal quality of the neighboring area satisfies a preset condition;

The sending module is further configured to initiate a voice service request again after the terminal device resides in the neighboring cell network.

In an embodiment, the preset condition is that the RSRP value is greater than a preset threshold or the RSRP is the largest among all neighboring frequency points.

In an embodiment, if the target frequency point is a frequency point of a 2G network, the search module, And configuring, when the receiving module receives the indication information of the network congestion and cannot fall back to the target frequency point, searching for a frequency point where the signal quality of the neighboring area of the 3G network meets the preset condition.

In an embodiment, if the target frequency point is a frequency point of the 3G network, the searching module is configured to search when the receiving module receives the indication information of the network congestion and cannot fall back to the target frequency point. The signal quality of the neighboring area of the 2G network satisfies the frequency of the preset condition.

The embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores a computer program, and the computer program is used to execute the voice service processing method according to the embodiment of the invention.

The voice service processing method, the terminal device, and the computer storage medium provided by the embodiments of the present invention do not continue to reside in the LTE network when the circuit domain core network congestion and the CSFB process network handover fail, but search for the circuit domain network of the neighboring area. The terminal directly tries to find a suitable cell in the network to camp, and initiates access in the camping mode to perform voice service. The technical solution of the present invention can reduce the time overhead of re-entering the LTE network and establishing an ESR request, and can directly select the neighboring network camp during the camping period of the network handover failure, thereby greatly shortening the delay required for re-initiating the circuit domain service. Increasing the system response speed can also improve the call setup success rate, and can also shorten the time required to re-establish a call, thereby improving communication quality and user experience.

DRAWINGS

1 is a CSFB caller signaling flowchart;

2 is a flowchart of a method for improving a call rate of an LTE terminal device according to an embodiment of the present invention;

3 is a flowchart of a method for improving a call rate of an LTE terminal device according to another embodiment of the present invention;

4 is a block diagram of components of a terminal device according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of hardware of a terminal device according to an embodiment of the present invention.

The main component symbol description:

100-terminal device, 10-search module, 20-transmit module, 30-receive module, 200-terminal device, 201-memory, 202-processor.

detailed description

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The terminal device, that is, the UE, involved in the present application may be a wireless terminal or a wired terminal, and the wireless terminal may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connection function, or is connected to Other processing devices for wireless modems. The wireless terminal can communicate with at least one core network via a Radio Access Network (RAN), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, such as They can be portable, pocket, handheld, computer built-in or in-vehicle mobile devices that exchange language and/or data with the wireless access network. For example, Personal Communication Service (PCS), cordless telephone, Session Initiation Protocol (SIP), Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA, Personal Digital) Assistant) and other devices. A wireless terminal may also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, or an access point. Remote Terminal, Access Terminal, User Terminal, User Agent, User Device, or User Equipment.

CSFB is to enable the terminal to initiate CS services such as voice services under LTE access, and to receive paging of CS services such as voice, and to correctly process the ongoing PS services of the terminal in the LTE network, and generate CSFB. technology. The reality is to switch voice calls to 2G or 3G networks.

In the initial stage of building a TD-LTE network, if the operator already has a mature UMTS Terrestrial Radio Access Network (UMRAN, GSMED GE Radio Access Network) network, CS investment Protection, combined with the deployment strategy of the TD-LTE network, the operator can use the original CS domain voice solution to provide voice services, while the TD-LTE network only processes data services (including IMS data services). In this case, the CSFB technology is adopted, that is, when the UE under the LTE coverage processes the voice service, the terminal first falls back to the CS (circuit domain) network, and processes the voice service in the CS network; thus, the reuse of the existing CS domain is achieved. The device provides the purpose of providing traditional voice services for users in the TD-LTE network.

However, the use of CSFB is premised, that is, only in the overlapping coverage area of the evolved UMTS Terrestrial Radio Access Network (E-UTRAN) and UTRAN/GERAN, and the user equipment has CSFB function. When you can use the circuit domain to fall back.

The present invention relates to an LTE network, a 3G network, and a 2G network, and specifically falls back to the 3G network 2G network by the LTE network. The LTE network is taken as an example to describe the wireless network architecture.

A wireless network architecture may include several evolved nodes (eNBs) and other network entities. An eNB may be a base station that communicates with a UE and may be referred to as a base station, a Node B, an access point, and the like. Each eNB can provide communication coverage for a particular geographic area. In 3GPP, the term "cell" may refer to the coverage area of an eNB and/or the coverage area of an eNB subsystem serving this coverage area, depending on the context in which the term is used.

The eNB may provide communication coverage for macro cells, pico cells, femto cells, and/or other types of cells. A macro cell may cover a relatively large geographic area (eg, a few kilometers in radius) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (eg, a home) and may allow UEs associated with the femto cell (eg, UEs in a Closed Subscriber Group (CSG), UEs for users in a home, etc.) Limited access. An eNB for a macro cell may be referred to as a macro eNB (ie, a macro base station). An eNB for a pico cell may be referred to as a pico eNB (ie, a pico base station). For femtocells An eNB may be referred to as a femto eNB (ie, a femto base station) or a home eNB. An eNB may support one or more (eg, three) cells.

The wireless network may also include a relay station. A relay station is a station that receives transmissions of data and/or other information from an upstream station (e.g., an eNB or a UE) and transmits transmissions of data and/or other information to a downstream station (e.g., UE or eNB). The relay station may also be a UE that relays transmissions for other UEs. A relay station may also be referred to as a relay eNB, a repeater, or the like.

The wireless network may be a heterogeneous network (HerNet) including different types of eNBs such as macro eNBs, pico eNBs, femto eNBs, repeaters, and the like. These different types of eNBs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network. For example, a macro eNB has a high transmit power level (eg, 20 W) while a pico eNB, a femto eNB, and a repeater have a lower transmit power level (eg, 1 W).

Also included in the wireless network is a network controller that can be coupled to a set of eNBs and provide coordination and control for these eNBs. The network controller can communicate with the eNB via the backhaul. The eNBs may also communicate with each other, for example, directly or indirectly via a wireless backhaul or a wired backhaul.

Referring to FIG. 1, when the UE initiates a voice service request, if the LTE network can be normally dropped back to the 2G/3G network through the CSFB process, the following CSFB calling process (reconstruction signaling process) can be performed:

1. The UE initiates a CSFB voice service request to the MME.

2. The MME sends an S1-AP UE CONTEXT MODIFICATION REQUEST message to the eNodeB, and the message includes CS Fallback Indicator. This message is used to indicate the eNodeB that the UE needs to fall back to the UTRAN (3G) network or the GERAN (2G) network due to the CSFB service.

3. The eNodeB requires the UE to start the cell measurement of the different system, obtain the measurement report reported by the UE, determine the redirected target system cell, and send the wireless configuration information of the target system to the UE, and release the connection.

4. The UE accesses the target system cell and initiates a service request (CM SERVICE REQUEST) of the CS domain.

5. If the MSC to which the target system cell belongs is different from the mobile switching center (MSC, Mobile Switching Center) registered when the UE is attached to the Evolved Packet System (EPS) network, the MSC receives the service of the CS domain of the UE. When requesting, since there is no information of the UE, an implicit location update process can be adopted to accept the user request. If the MSC does not support implicit location update and the MSC has no user data (ie, the serving MSC is different from the EPS/IMSI registered MSC), the user's service request is rejected. If the MSC rejects the service request of the user, the UE initiates a CS domain location update procedure until the UE re-initiates the service request of the CS domain.

6. CS domain voice call setup process.

Referring to FIG. 2, an embodiment of the present invention provides a voice service processing method, where the LTE terminal device takes a mobile phone as an example, and includes the following steps:

S101: The mobile phone functions normally. After booting, the device can reside in 2G (eg GSM, CDMA), 3G (eg WCDMA, CDMA2000, TD-SCDMA) or 4G (eg TD-LTE, FDD-LTE) networks, and can perform 2G/ 3G voice service and / or 4G data service. 2G and 3G networks also support data services, but the data transmission speed is slow, which does not meet the demand for large data services.

S102: When the mobile phone searches for a stable 4G signal, it accesses and camps on the LTE network. The LTE network only supports data services, that is, packet switching services. When voice services need to be supported, one implementation method is implemented by Volte technology without switching the network, but the technology does not have a large scale in China. Commercial. Another implementation is achieved by CSFB technology, which enables the mobile phone to fall back from the LTE network to the 2G/3G network supporting the circuit domain.

S103: The mobile phone that is camped on the LTE network initiates a voice service call; and the CSFB technology is used to trigger the mobile phone to fall back from the LTE network to the 2G/3G network for voice service in the dual coverage areas of LTE and 2G/3G.

S104: When the mobile phone initiates a voice service call in the LTE network, the LTE base station sends the LTE base station to the LTE network. The network sends an extended service request (ESR), so that the LTE network learns that the terminal device needs to perform circuit domain service, and the LTE network instructs the terminal to fall back to the 2G or 3G network. When the terminal falls back to the 2G or 3G network, the terminal initiates the MSC. The access request determines whether the terminal is allowed to initiate the circuit domain service according to the priority of the terminal user and the system load state of the terminal; when the terminal is allowed to access, the terminal performs network switching. If the circuit domain system is overloaded at this time, the terminal handover fails, resulting in the final call failure, and there may be cases where the re-dialing call is also failed. When the terminal receives the indication information about the network congestion indicating the congestion of the core network of the circuit domain, the following step S105 is performed to avoid the interruption of the voice service; wherein the indication information of the network congestion may specifically be the #39 error information.

S105: The neighboring cell supports the circuit domain service network cell and the frequency point, and initiates a network search to select a target cell that the terminal device can access, where the target cell may be adjacent to the LTE network in the 2G/3G network. Community.

S106: After the terminal device resides in the selected target cell, the voice service can be performed under the network. At this point, the mobile phone re-initiates a voice service call.

S107: The terminal device performs voice service on the 2G/3G network of the selected target cell to solve the problem that the success rate of the call traffic caused by the network congestion is not high.

S108: After the voice service ends, the terminal device performs another network handover and re-residents on the LTE network.

Referring to FIG. 3, an embodiment of the present invention further provides a voice service processing method, where the method includes the following steps:

S201: A UE residing in an LTE network initiates a voice service call by sending an ESR.

S202: Receive a downlink signal sent by the network side device, where the downlink signal may be an RRC Connection Release signal, and carry information of the configured 2G/3G network target frequency point and the adjacent area frequency point.

S203: If the terminal device receives the indication information of the network congestion, the terminal device cannot fall back to the target frequency. Point, searching for a frequency point in which the neighboring cell signal quality satisfies a preset condition based on the information of the neighboring cell frequency point. In the embodiment of the present invention, the network congestion indication information is used to indicate that the circuit domain core network is congested, and the network congestion indication information may specifically be #39 information, and the #39 information indicates that the circuit domain core network is congested. The preset condition is that the Reference Signal Received Power (RSRP) value is greater than a preset threshold or the RSRP is the largest among all neighboring frequency points.

S204: The terminal device resides in a neighboring cell network corresponding to a frequency point where the neighboring cell signal quality meets a preset condition.

S205: The terminal device initiates a voice service request again in the neighboring cell network.

As an implementation manner, if the target frequency point is a frequency point corresponding to the 2G network, the terminal device searches for a 3G network neighbor when the terminal device receives the indication information of the network congestion and cannot fall back to the target frequency point. The frequency at which the signal quality of the zone meets the preset conditions.

In another embodiment, if the target frequency point is a frequency point corresponding to the 3G network, the terminal device searches for the 2G network when the terminal device receives the indication information of the network congestion and cannot fall back to the target frequency point. The signal quality of the neighboring area meets the preset condition.

Referring to FIG. 4, an embodiment of the present invention provides a terminal device 100, including a search module 10, a sending module 20, and a receiving module 30.

The search module 10 is configured to search for an LTE network and camp on the LTE network when the device is powered on;

The sending module 20 is configured to initiate a voice service call by sending an ESR;

The receiving module 30 is configured to receive a downlink signal sent by the network side device, where the downlink signal carries the information of the configured 2G/3G network target frequency point and the neighboring frequency point;

The search module 10 is further configured to: if the receiving module 30 receives the indication information of the network congestion and cannot fall back to the target frequency point, search for the information of the neighboring frequency point received by the receiving module 30. The signal quality of the neighboring area meets the preset condition, so as to stay at the frequency point where the signal quality of the neighboring area meets the preset condition;

The sending module 20 is further configured to initiate the voice industry again after camping on the neighboring cell network. Request.

The indication information of the network congestion is used to indicate that the circuit domain core network is congested, and the indication information of the network congestion may be specifically #39 information, and the #39 information indicates that the circuit domain core network is congested; the search module 10 of the terminal device 100 is After receiving the #39 information, the receiving module 30 starts searching for the frequency of the neighboring area signal quality that meets the preset condition, so that the terminal device 100 can quickly search for the neighboring area that can be accessed when the network is congested, thereby avoiding the occurrence of a voice call. Interrupted.

Specifically, the signal quality meets the preset condition that the RSRP value is greater than a preset threshold, and the RSRP value is greater than the threshold, and the neighboring area and the frequency point (a cell may have at least one frequency point) may be more than one. A random selection of a conditional frequency point access is selected, so that the time for searching the network can be reduced, and the terminal device can quickly access the neighboring area that satisfies the condition; the signal quality satisfies the preset condition and can also refer to the RSRP in all neighbors. The largest of the regional frequency points, the choice of the largest frequency point access of the RSRP, enables the terminal equipment to access the best cell and frequency of the signal, and can ensure the communication quality.

In this embodiment, the downlink signal received by the receiving module 30 may be an RRC Connection Release signal, and the signal carries information of a configured GSM (2G)/UTRAN (3G) network target frequency point and a neighboring frequency point.

As an embodiment, if the target frequency is the frequency of the 2G network, the search module 10 is configured to receive the indication information of the network congestion when the receiving module 30 cannot fall back to the target frequency. Searching for the frequency of the neighboring area of the 3G network to meet the preset conditions.

As an embodiment, if the target frequency is the frequency of the 3G network, the search module 10 is configured to receive the indication information of the network congestion when the receiving module 30 cannot fall back to the target frequency. Search for the frequency of the neighboring area of the 2G network to meet the preset conditions.

FIG. 5 is another schematic structural diagram of a terminal device 200 according to an embodiment of the present invention. The terminal device 200 includes at least: a memory 201 and a processor 202, wherein:

The memory 201 can include read only memory and random access memory and provides instructions and data to the processor 202, and a portion of the memory 201 can also include high speed random access Memory (Random Access Memory) may also include non-volatile memory.

The memory 201 stores elements, executable modules or data structures, or a subset thereof, or an extended set thereof.

Operation instructions: include various operation instructions for implementing various operations.

Operating system: Includes a variety of system programs for implementing various basic services and handling hardware-based tasks.

In the embodiment of the present invention, the processor 202 performs the following operations by calling an operation instruction stored in the memory 201 (the operation instruction can be stored in the operating system):

If the indication information of the network congestion is received and cannot fall back to the circuit domain (CS), the frequency of the neighboring cell signal quality that meets the preset condition is searched, so that the terminal device accesses the signal quality of the neighboring cell to meet the preset condition. Frequency.

In addition, the processor 202 is further configured to perform all or part of the steps in the method embodiment shown in FIG. 2 or FIG. 3, and details are not described herein again.

The terminal device in the embodiment of the present invention is a user device as described above in actual application, and may be a wireless terminal or a wired terminal, and the terminal device has the functional module shown in FIG. 4 or the structure shown in FIG. 5. The wireless terminal can communicate with at least one core network via a wireless access network (eg, RAN), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, It can be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and/or data with the wireless access network. Specifically, I will not repeat them here.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

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

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

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

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes 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. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art It should be understood that the technical solutions described in the foregoing embodiments may be modified, or some of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. The spirit and scope of the programme.

Industrial applicability

The technical solution of the embodiment of the present invention, when the core network congestion of the circuit domain and the handover of the CSFB process network fail, do not continue to reside in the LTE network, but search for the circuit domain network in the neighboring area, and the terminal directly tries to find a suitable network. The cell camps on and initiates access in the camping mode for voice traffic. The technical solution of the present invention can reduce the time overhead of re-entering the LTE network and establishing an ESR request, and can directly select the neighboring network camp during the camping period of the network handover failure, thereby greatly shortening the delay required for re-initiating the circuit domain service. Increasing the system response speed can also improve the call setup success rate, and can also shorten the time required to re-establish a call, thereby improving communication quality and user experience.

Claims

A voice service processing method, the method comprising:

The user equipment UE residing in the Long Term Evolution (LTE) network requests the ESR to initiate a voice service call by sending an extended service;

Receiving a downlink signal sent by the network side device, where the downlink signal carries information of a target frequency point and a neighboring frequency point of the configured 2G/3G network;

If the terminal device receives the indication information of the network congestion and cannot fall back to the target frequency point, searching for the frequency of the neighboring area signal quality that meets the preset condition based on the information of the neighboring area frequency point;

The terminal device resides in a neighboring cell network corresponding to a frequency point where the signal quality of the neighboring area meets a preset condition;

The terminal device initiates a voice service request again in the neighboring cell network.
The method of claim 1, wherein the indication information of the network congestion is used to indicate that the circuit domain core network is congested.
The method according to claim 1 or 2, wherein the preset condition is that the reference signal received power RSRP value is greater than a preset threshold or the RSRP is the largest among all neighbor frequency points.
The method according to claim 1, wherein if the target frequency point is a frequency point of a 2G network, when the terminal device receives indication information of network congestion and cannot fall back to the target frequency point, The terminal device searches for a frequency point in which the signal quality of the neighboring area of the 3G network satisfies a preset condition.
The method according to claim 1, wherein, if the target frequency point is a frequency point of a 3G network, when the terminal device receives indication information of network congestion and cannot fall back to the target frequency point, The terminal searches for a frequency point in which the signal quality of the neighboring area of the 2G network satisfies a preset condition.
A terminal device includes: a search module, a sending module, and a receiving module;

The search module is configured to search for an LTE network when camping on and camp on the LTE network;

The sending module is configured to initiate a voice service call by sending an ESR;

The receiving module is configured to receive a downlink signal sent by the network side device, where the downlink signal is sent Number carries the configured target frequency of the 2G/3G network and the information of the adjacent frequency points;

The search module is further configured to: if the receiving module receives the indication information of the network congestion, and cannot fall back to the target frequency point, search for the neighboring area signal based on the information of the neighboring frequency point received by the receiving module. a frequency point that satisfies a preset condition to maintain a frequency point at which the signal quality of the neighboring area satisfies a preset condition;

The sending module is further configured to initiate a voice service request again after camping in the neighboring cell network.
The terminal device according to claim 6, wherein the indication information of the network congestion is used to indicate that the circuit domain core network is congested.
The terminal device according to claim 6 or 7, wherein the preset condition is that the RSRP value is greater than a preset threshold or the RSRP is the largest among all neighboring frequency points.
The terminal device according to claim 6, wherein if the target frequency point is a frequency point of a 2G network, the search module is configured to receive indication information of network congestion at the receiving module and cannot fall back to the At the target frequency point, the frequency of the neighboring area signal quality of the 3G network is searched for the frequency of the preset condition.
The terminal device according to claim 6, wherein if the target frequency point is a frequency point of a 3G network, the search module is configured to receive indication information of network congestion at the receiving module and cannot fall back to the When the target frequency is used, the frequency of the neighboring area signal quality of the 2G network is searched for the preset condition.
A computer storage medium storing a computer program for executing the voice service processing method according to any one of claims 1 to 5.