CN104703236B - A kind of method for switching network and device of terminal communication - Google Patents

Abstract

The present invention provides a terminal voice communication method. The method includes: when detecting that FDD_LTE network, WCDMA network or TDD_LTE is used for voice communication, detecting whether there is a GSM network signal in the environment where the terminal is located; if there is, judging the GSM network signal If the value is greater than the preset signal threshold, the signal quality report of the currently used network sent by the terminal to the base station is intercepted, and the pre-stored virtual network signal quality report is sent, so that the network for voice communication of the terminal is switched to the GSM network. In this way, the terminal performs voice communication in a more power-saving mode, saves power, and improves the battery life of the terminal.

Description

A network switching method and device for terminal communication

technical field

The invention belongs to the field of communication, and in particular relates to a network switching method and device for terminal communication.

Background technique

The voice communication development of mobile terminals has gone through the process from TDM (English full name is Time Division Multiplexing, Chinese full name is Time Division Multiplexing) to IP (English full name is Internet Protocol, Chinese full name is Internet Network Protocol), from traditional electrical switches to software switching The development will move towards mobile broadband voice in the future. The wireless side is from GSM (English full name is Global System for Mobile Communication, Chinese full name is Global Mobile Communication System), to CDMA (English full name is Code Division Multiple Access, Chinese full name is Code Division Multiple Access), to UMTS (English full name is Code Division Multiple Access), to UMTS (English full name is The development of Universal Mobile Telecommunications System (the full name in Chinese is Universal Mobile Communication System), and the development of the core network side is reflected from CS (full name in English is Circuit Switched, full name in Chinese is Circuit Switched) to IMS (full name in English is IP Multimedia Subsystem, full name in Chinese is IP Multimedia Subsystem) development. my country's mobile operators are also experiencing the evolution from 2G to 3G and then to 4G in the mobile communication network.

In the existing mobile terminals, there are generally multiple communication protocol modules at the same time. For example, the same intelligent terminal usually has multiple communication protocol modules ranging from 2G, 3G to 4G. During use, the terminal usually uses signal The communication protocol module with the best quality, and under the same signal quality, the latest communication protocol module is preferred. For example, the 4G communication module is preferred, and the 3G communication module is used to provide communication services for users. Although it can provide better services for users Quality, but the terminal tends to be in a relatively large power consumption mode, which is not conducive to improving the battery life of the terminal.

Contents of the invention

The purpose of the present invention is to provide a network switching method for terminal communication, so as to solve the problem that the communication terminal in the prior art tends to be in a relatively large power consumption mode during communication, which is not conducive to improving the battery life of the terminal.

In a first aspect, the present invention provides a network switching method for terminal communication, the method comprising:

When detecting the use of FDD_LTE network, WCDMA network or TDD_LTE for voice communication, detect whether there is a GSM network signal in the environment where the terminal is located;

If there is a GSM network signal in the environment where the terminal is located, determine whether the GSM network signal value is greater than a preset signal threshold;

If the GSM network signal value is greater than the preset signal threshold, intercept the signal quality report of the currently used network sent by the terminal to the base station, send the pre-stored virtual network signal quality report, and switch the terminal's voice communication network to the GSM network .

With reference to the first aspect, in a first possible implementation manner of the first aspect, the method specifically includes:

If there is a GSM network signal in the environment where the terminal is located, determine whether the GSM network signal is greater than a preset signal threshold;

If the GSM network signal is greater than the preset signal threshold, intercept the signal quality report of the currently used network sent by the terminal to the base station, and send a pre-stored virtual signal value including the currently used network and the GSM network, so that the terminal performs The voice communication network is switched to the GSM network;

If there is no GSM network signal, or the GSM network signal is less than a preset signal threshold, then determine whether there is a TDD_LTE network signal;

If there is a TDD_LTE network signal, and the TDD_LTE network signal is greater than the preset signal threshold, intercept the signal quality report of the currently used network sent by the terminal to the base station, and send a pre-stored virtual network including the currently used network and the TDD_LTE network The signal value is used to switch the voice communication network of the terminal to the TDD_LTE network.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the prestored virtual network signal quality report includes the currently used network and the network whose detected network signal value is greater than a preset signal threshold, and set It is determined that the signal quality value of the currently used network is less than the preset signal threshold, and the signal value of the detected network is set to be greater than the preset signal threshold.

With reference to the first aspect, in a third possible implementation manner of the first aspect, the preset signal threshold is a threshold value of a network signal quality used by the base station to communicate with the terminal.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the method further includes:

When the call ends, stop intercepting the network signal quality report sent and stop sending the virtual signal quality report, so that the terminal returns to the network used before the call for communication.

In a second aspect, an embodiment of the present invention provides a network switching device for terminal communication, and the device includes:

The network detection unit is used to detect whether there is a GSM network signal in the environment where the terminal is located when it is detected that the FDD_LTE network, WCDMA network or TDD_LTE is used for voice communication;

A signal value judging unit, configured to judge whether the GSM network signal value is greater than a preset signal threshold if there is a GSM network signal in the environment where the terminal is located;

The report interception and sending unit is used to intercept the signal quality report of the currently used network sent by the terminal to the base station if the GSM network signal value is greater than the preset signal threshold, and send a pre-stored virtual network signal quality report to enable the terminal to perform The voice communication network is switched to the GSM network.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the device specifically includes:

The first signal judging module is used to judge whether the GSM network signal is greater than a preset signal threshold if there is a GSM network signal in the environment where the terminal is located;

The first interception and sending module is used to intercept the signal quality report of the currently used network sent by the terminal to the base station if the GSM network signal is greater than the preset signal threshold, and send the pre-stored report including the currently used network and GSM The virtual signal value of the network, so that the network for voice communication of the terminal is switched to the GSM network;

The second signal judging module is used to judge whether there is a TDD_LTE network signal if there is no GSM network signal, or if the GSM network signal is less than a preset signal threshold;

The second interception and sending module is used to intercept the signal quality report of the currently used network sent by the terminal to the base station if there is a TDD_LTE network signal, and the TDD_LTE network signal is greater than the preset signal threshold, and send the prestored, including The currently used network and the virtual signal value of the TDD_LTE network enable the terminal to switch the network for voice communication to the TDD_LTE network.

With reference to the second aspect, in a second possible implementation manner of the second aspect, the prestored virtual network signal quality report includes the currently used network and the network whose detected network signal value is greater than a preset signal threshold, and set It is determined that the signal quality value of the currently used network is less than the preset signal threshold, and the signal value of the detected network is set to be greater than the preset signal threshold.

With reference to the second aspect, in a third possible implementation manner of the second aspect, the preset signal threshold is a threshold value of a network signal quality used by the base station to communicate with the terminal.

With reference to the second aspect, in a fourth possible implementation manner of the second aspect, the device further includes:

The intercepting and terminating unit is used for terminating the interception of the network signal quality report sent and the sending of the virtual signal quality report when the call ends, so that the terminal returns to the network used before the call for communication.

In the present invention, when the terminal uses the FDD_LTE network, WCDMA network or FDD_LTE network for voice communication, it detects other network signals in the environment where the terminal is located, including GSM network signals, and determines whether there is a GSM network signal that meets the communication requirements. , if there is a GSM network signal that meets the requirements, then intercept the signal quality report of the currently used network sent by each base station of the terminal, and send a virtual signal quality report, so that the network for voice communication of the terminal is switched to the GSM network, so that the terminal is in a more stable state. In order to carry out voice communication in the power-saving mode, save power and improve the battery life of the terminal.

Description of drawings

FIG. 1 is a flow chart of implementing a network switching method for terminal communication provided by a first embodiment of the present invention;

FIG. 2 is a flow chart of implementing a network switching method for terminal communication provided by a second embodiment of the present invention;

FIG. 3 is a flow chart of implementing a network switching method for terminal communication provided by a third embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a network switching device for terminal communication provided by a fourth embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The network switching method for terminal communication described in the embodiment of the present invention aims to solve the problem that when the terminal in the prior art includes a variety of communication protocol networks, the latest communication protocol network is often preferred in consideration of the speed of communication data, such as priority The 4G communication network is selected. When the quality of the 4G communication network cannot meet the communication requirements, the 3G communication network is selected. When the 3G communication network cannot meet the communication requirements, the 2G communication network is selected. The advantage of this is that the data communication speed of the communication can be guaranteed. However, when users make voice calls, if they choose the latest communication protocol network, it may cause a large loss of power consumption. Therefore, it is necessary to provide a more terminal communication network switching method to reduce terminal loss and improve battery life. ability.

In order to solve the above problems, the present invention provides a network switching method for terminal communication, the method comprising: when detecting that FDD_LTE network, WCDMA network or TDD_LTE is used for voice communication, detecting whether there is a GSM network signal in the environment where the terminal is located; If there is a GSM network signal in the environment where the terminal is located, determine whether the GSM network signal value is greater than the preset signal threshold; if the GSM network signal value is greater than the preset signal threshold, then intercept the currently used network sent by the terminal to the base station The signal quality report, send the pre-stored virtual network signal quality report, so that the network for voice communication of the terminal is switched to the GSM network.

When the terminal uses the FDD_LTE network, WCDMA network or FDD_LTE network for voice communication, it detects other network signals in the environment where the terminal is located, including GSM network signals, and determines whether there is a GSM network signal that meets the communication requirements. GSM network signal, then intercept the signal quality report of the currently used network sent by each base station of the terminal, and send a virtual signal quality report, so that the network for voice communication of the terminal is switched to the GSM network, so that the terminal is in a more power-saving mode Voice communication can be performed under the environment, which saves power and improves the battery life of the terminal. It will be described in detail below in conjunction with the accompanying drawings.

Embodiment one:

Figure 1 shows the implementation process of the network switching method for terminal communication provided by the first embodiment of the present invention, which is described in detail as follows:

In step S101, when it is detected that the FDD_LTE network, WCDMA network or TDD_LTE is used for voice communication, it is detected whether there is a GSM network signal in the environment where the terminal is located.

Specifically, the FDD_LTE, that is, the FDD (the English full name is Frequency Division Duplexing, the Chinese full name is Frequency Division Duplexing) in LTE (English full name is Long Term Evolution, Chinese full name is Long Term Evolution) mode, and the WCDMA, English The full name is Wideband Code Division Multiple Access, the Chinese full name is wideband code division multiple access communication mode, the TDD_LTE, the English full name is Time Division-Synchronous Code Division Multiple Access, the Chinese full name is time division synchronous code division multiple access.

The terminal in the embodiment of the present invention may be a communication terminal such as a smart phone, and the communication terminal includes at least two or more communication modules, and the two communication modules have basically the same signal quality when performing voice communication. In each case, the power consumed is different.

Of course, when the terminal is in the data communication scenario, the default network recommendation method of the system can be used, for example, the fastest communication protocol network is preferred for data transmission, or the data transmission can be performed according to the communication protocol network set by the user.

Before implementing the embodiment of the present invention, it may also include judging whether to turn on the power saving mode, if the power saving mode is not turned on, then do not enter the power saving implementation steps described in step S101 and step S102 of the embodiment of the present invention, if the power saving mode is turned on mode, when the FDD_LTE, WCDMA or TDD_LTE network is used for voice communication, it is determined that the GSM network in the environment where the terminal is located exists and the signal quality is greater than a predetermined value.

In step S102, if there is a GSM network signal in the environment where the terminal is located, it is judged whether the value of the GSM network signal is greater than a preset signal threshold.

Specifically, the full name of GSM in English is Global System for Mobile Communication, and the full name in Chinese is Global System for Mobile Communication.

The signal threshold is a threshold value of network signal quality used by the base station to communicate with the terminal. When the signal quality of the communication network is lower than the threshold value, the communication between the base station and the terminal will be affected, that is, the terminal needs to consume more power to maintain the communication between the terminal and the base station, or even if it consumes more power Electric energy cannot maintain the communication between the terminal and the base station.

At present, the data Internet access and video call experience of terminals through 4G_LTE and 3G_GSM signals are much better than 2G_TDD_LTE signals; but for pure voice calls, the high-quality experience brought by 4G_VoLTE and 3G_TD-SCDMA is not too obvious, or the quality of voice calls Minor improvement.

In the initial stage of VoLTE, the following network standards generally exist in the terminal: 2G_TDD_LTE network, 3G_GSM network, and 4G may be one or both of FDD_LTE network/WCDMA network; the current GSM call current is about 90mA~250mA Among them, the WCDMA call current is generally between 100mA-500mA, the FDD_LTE current is approximately 120mA-600mA, and the TDD_LTE current is approximately 100-400mA. It can be seen from the data that under the same signal strength, the order of call power consumption of each system is as follows: FDD_LTE>WCDMA>TDD_LTE>GSM.

In step S103, if the signal value of the GSM network is greater than the preset signal threshold, then intercept the signal quality report of the currently used network sent by the terminal to the base station, send a pre-stored virtual network signal quality report, and make the terminal perform voice communication The network is switched to the GSM network.

In the embodiment of the present invention, when it is detected that the signal value of the GSM network is greater than the preset signal threshold, the signal quality of the currently used network (FDD_LTE, TDD_LTE or WCDMA) measured in real time fed back by the terminal uplink to the base station is intercepted measurement reports and send pre-stored virtual signal quality reports.

The virtual network signal quality report can be arranged and combined according to the network in use and the detected network, and four types can be stored in advance, which will be described in detail in subsequent embodiments.

The pre-stored virtual network signal quality report in the embodiment of the present invention includes two kinds of network signals, that is, the network being used by the terminal and the network detected to meet the communication requirements, and the network being used can be a WCDMA network, TDD_LTE or FDD_LTE network , the detected network meeting the communication requirements may be a GSM network. And the signal quality value of the network being used is set to be less than the preset signal threshold, and the signal quality of the detected network meeting the communication requirements is set to be greater than the preset signal threshold.

According to the received virtual network signal quality report, the base station switches the terminal to the detected network because the data in the virtual network signal quality report shows that the signal quality of the currently used network is poor, and the signal quality of the detected network is better, It is possible to switch to a network that satisfies the required detection. Therefore, the terminal can perform voice communication in a more energy-saving mode, and the use time of the terminal can be increased.

Embodiment two:

FIG. 2 shows the implementation process of the network switching method for terminal communication provided by the second embodiment of the present invention, which is described in detail as follows:

In step S201, when it is detected that the FDD_LTE network or WCDMA network is used for voice communication, it is detected whether there is a GSM network signal in the environment where the terminal is located.

In step S202, if there is a GSM network signal in the environment where the terminal is located, it is judged whether the GSM network signal is greater than a preset signal threshold.

In step S203, if the GSM network signal is greater than the preset signal threshold, intercept the signal quality report of the currently used network sent by the terminal to the base station, and send a pre-stored virtual signal including the currently used network and the GSM network value, so that the network for voice communication of the terminal is switched to the GSM network.

In step S204, if there is no GSM network signal, or if the GSM network signal is smaller than a preset signal threshold, it is determined whether there is a TDD_LTE network signal.

In step S205, if there is a TDD_LTE network signal, and the TDD_LTE network signal is greater than the preset signal threshold, intercept the signal quality report of the currently used network sent by the terminal to the base station, and send the prestored And the virtual signal value of the TDD_LTE network, so that the network where the terminal performs voice communication is switched to the TDD_LTE network.

In the actual network environment, since the coverage of TDD_LTE signal is much larger than that of GSM signal, the best choice of GSM or TDD_LTE call depends on whether there is GSM signal coverage in the actual network.

The difference between the embodiment of the present invention and the first embodiment is that the embodiment of the present invention preferentially detects whether there is a GSM network signal in the environment where the terminal is located, and switches the currently used network when it detects that there is a GSM signal that meets the requirements in the environment It is a GSM network, if there is no GSM network that meets the requirements, then detect whether there is a TDD_LTE network that meets the requirements, so that the present invention can find the most energy-saving network, and can further reduce the power of the terminal when there is no GSM network signal Consumption, improve the battery life of the terminal.

Embodiment three:

Fig. 3 shows the implementation process of a network switching method for terminal communication provided by the third embodiment of the present invention, which is described in detail as follows:

Multiple virtual network signal quality reports reported to the base station are preferentially configured in the memory of the terminal, including:

Report 1: Contains virtual data of FDD_LTE network signal quality, and the data can meet the requirement that the base station initiate a command to switch from FDD_LTE to GSM network to the mobile phone;

Report 2: Contains dummy data of the signal quality of the TDD_LTE network, and the data can meet the requirement that the base station initiate a command to switch from TDD_LTE to the GSM network to the mobile phone;

Report 3: Contains virtual data of WCDMA network signal quality, and the requirement that this data can meet is to make the base station initiate a handover command from WCDMA to GSM network to the mobile phone.

In step S301, the mobile phone in the standby state maintains the original network status of the operator, preferentially resides in the 4G_LTE network, followed by the 3G_WCDMA network, and finally the 2G_GSM network;

In step S302, when the user uses the data service, the network maintains the inherent network strategy of the operator, and uses the 4G_LTE network first, followed by the 3G_WCDMA network, and finally the 2G_GSM network, to obtain better user experience;

In step S303, the user enters the pure voice call service (comprising incoming and outgoing calls), and the mobile phone increases the detection of the incoming and outgoing state of the voice call, and performs S304 operation after detecting the operation;

In step S304, the mobile phone detects that the voice service is in the incoming and outgoing state, first judge whether the voice call is currently in the GSM network, if the judgment result is "yes", then do not perform any operation, and maintain the original network state; if it is judged as " No", then perform operation S305;

In step S305, analyze the current network information, judge that the current network is FDD_LTE, then execute S306; judge that the current network is TDD_LTE, then execute S307; judge that the current network is WCDMA, then execute S308;

In step S306, an instruction is issued to intercept the FDD_LTE signal quality measurement report that the current state mobile phone will report to the base station, and call the pre-stored report 1, and report it to the base station through the uplink, so that the base station initiates a command to switch from FDD_LTE to the GSM network, and the mobile phone switches Make a call to the GSM network;

In step S307, issue an instruction to intercept the TDD_LTE signal quality measurement report that the mobile phone in the current state will report to the base station, and call the pre-stored report 2, and report it to the base station through the uplink, so that the base station initiates a command to switch from TDD_LTE to the GSM network, and the mobile phone switches Make a call to the GSM network;

In step S308, issue an instruction to intercept the WCDMA signal quality measurement report that the mobile phone in the current state will report to the base station, and call the pre-stored report 3, and report to the base station through the uplink, so that the base station initiates a command to switch from WCDMA to the GSM network, and the mobile phone switches Make a call to the GSM network;

In step S309, the call is over, and the end-of-call state is detected, and stop sending the preset report data in the memory and stop intercepting the current network data detected by the mobile phone;

Through the above process, we can use the settings on the mobile phone to directly use the 2G_GSM network for voice calls without using the 4G/3G network with a large call current in the power-saving call mode, which greatly saves call power consumption and improves the battery life of the phone. .

Embodiment four:

FIG. 4 is a schematic structural diagram of a network switching device for terminal communication provided by a fifth embodiment of the present invention, which is described in detail as follows:

The network switching device for terminal communication according to the embodiment of the present invention includes:

The network detection unit 401 is used to detect whether there is a GSM network signal in the environment where the terminal is located when it is detected that the FDD_LTE network, WCDMA network or TDD_LTE is used for voice communication;

A signal value judging unit 402, configured to judge whether the GSM network signal value is greater than a preset signal threshold if there is a GSM network signal in the environment where the terminal is located;

The report intercepting and sending unit 403 is used to intercept the signal quality report of the currently used network sent by the terminal to the base station if the GSM network signal value is greater than the preset signal threshold, and send a pre-stored virtual network signal quality report, so that the terminal The network for voice communication is switched to the GSM network.

Preferably, the device specifically includes:

The first signal judging module is used to judge whether the GSM network signal is greater than a preset signal threshold if there is a GSM network signal in the environment where the terminal is located;

The first interception and sending module is used to intercept the signal quality report of the currently used network sent by the terminal to the base station if the GSM network signal is greater than the preset signal threshold, and send the pre-stored report including the currently used network and GSM The virtual signal value of the network, so that the network for voice communication of the terminal is switched to the GSM network;

The second signal judging module is used to judge whether there is a TDD_LTE network signal if there is no GSM network signal, or if the GSM network signal is less than a preset signal threshold;

The second interception and sending module is used to intercept the signal quality report of the currently used network sent by the terminal to the base station if there is a TDD_LTE network signal, and the TDD_LTE network signal is greater than the preset signal threshold, and send the prestored, including The currently used network and the virtual signal value of the TDD_LTE network enable the terminal to switch the network for voice communication to the TDD_LTE network.

Preferably, the pre-stored virtual network signal quality report includes the currently used network and the network whose detected network signal value is greater than a preset signal threshold, and the signal quality value of the currently used network is set to be smaller than the preset signal threshold , set the signal value of the detected network to be greater than the preset signal threshold.

Preferably, the preset signal threshold is a threshold value of network signal quality used by the base station to communicate with the terminal.

Preferably, the device also includes:

The intercepting and terminating unit is used for terminating the interception of the network signal quality report sent and the sending of the virtual signal quality report when the call ends, so that the terminal returns to the network used before the call for communication.

The network switching device for terminal communication described in the embodiment of the present invention corresponds to the network switching method for terminal communication described in Embodiments 1 to 4, and will not be repeated here.

In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

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, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes. .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (8)

1. A network switching method for terminal communication is characterized in that the method comprises the following steps:

when detecting that voice communication is carried out by using an FDD _ LTE network, a WCDMA network or a TDD _ LTE network, detecting whether a GSM network signal exists in the environment where the terminal is located;

if the GSM network signal exists in the environment where the terminal is located, judging whether the GSM network signal value is larger than a preset signal threshold value;

if the GSM network signal value is larger than a preset signal threshold value, intercepting a signal quality report of a currently used network sent to a base station by a terminal, and sending a pre-stored virtual network signal quality report to enable the network of the terminal for voice communication to be switched to the GSM network; wherein,

the pre-stored virtual network signal quality report comprises a currently used network and a network with a detected network signal value larger than a preset signal threshold value, the signal quality value of the currently used network is set to be smaller than the preset signal threshold value, and the signal value of the detected network is set to be larger than the preset signal threshold value.

2. The method of claim 1, further comprising:

when voice communication is detected by using an FDD-LTE network or a WCDMA network, if a GSM network signal exists in the environment where a terminal is located, judging whether the GSM network signal is greater than a preset signal threshold value;

if the GSM network signal is greater than a preset signal threshold value, intercepting a signal quality report of a currently used network sent to a base station by a terminal, and sending a pre-stored virtual signal value comprising the currently used network and the GSM network to enable the network of the terminal for voice communication to be switched to the GSM network;

if the GSM network signal does not exist, or the GSM network signal is smaller than a preset signal threshold value, judging whether a TDD _ LTE network signal exists or not;

if a TDD _ LTE network signal exists and is greater than a preset signal threshold value, intercepting a signal quality report of a currently used network sent to a base station by a terminal, and sending a pre-stored virtual signal value comprising the currently used network and the TDD _ LTE network so that the network of the terminal for voice communication is switched to the TDD _ LTE network.

3. The method according to claim 1 or 2, wherein the preset signal threshold is a threshold of network signal quality used by the base station for communicating with the terminal.

4. The method of claim 1, further comprising:

when the call is finished, stopping intercepting the sent network signal quality report and stopping sending the virtual signal quality report, and enabling the terminal to recover to the network used before the call for communication.

5. A network switching apparatus for terminal communication, the apparatus comprising:

the network detection unit is used for detecting whether GSM network signals exist in the environment where the terminal is located when voice communication is detected to be performed by using an FDD _ LTE network, a WCDMA network or a TDD _ LTE network;

the signal value judging unit is used for judging whether the GSM network signal value is larger than a preset signal threshold value or not if a GSM network signal exists in the environment where the terminal is located;

a report intercepting and sending unit, configured to intercept a signal quality report of a currently used network sent to the base station by the terminal if the GSM network signal value is greater than a preset signal threshold value, and send a pre-stored virtual network signal quality report, so that a network in which the terminal performs voice communication is switched to a GSM network; wherein,

the pre-stored virtual network signal quality report comprises a currently used network and a network with a detected network signal value larger than a preset signal threshold value, the signal quality value of the currently used network is set to be smaller than the preset signal threshold value, and the signal value of the detected network is set to be larger than the preset signal threshold value.

6. The device according to claim 5, characterized in that it comprises in particular:

the terminal comprises a first signal judgment module, a second signal judgment module and a third signal judgment module, wherein the first signal judgment module is used for judging whether a GSM network signal is greater than a preset signal threshold value or not if the GSM network signal exists in the environment where the terminal is located when voice communication is detected by using an FDD _ LTE network or a WCDMA network;

the first interception and transmission module is used for intercepting a signal quality report of a currently used network sent to the base station by the terminal if the GSM network signal is greater than a preset signal threshold value, and sending a pre-stored virtual signal value comprising the currently used network and the GSM network to enable the network of the terminal for voice communication to be switched to the GSM network;

the second signal judgment module is used for judging whether a TDD _ LTE network signal exists or not if the GSM network signal does not exist or the GSM network signal is smaller than a preset signal threshold;

and the second intercepting and sending module is used for intercepting a signal quality report of a currently used network sent to the base station by the terminal if a TDD _ LTE network signal exists and is greater than a preset signal threshold value, and sending a pre-stored virtual signal value comprising the currently used network and the TDD _ LTE network so as to switch the network for voice communication of the terminal to the TDD _ LTE network.

7. The apparatus of claim 5 or 6, wherein the preset signal threshold is a threshold of network signal quality used by the base station to communicate with the terminal.

8. The apparatus of claim 5, further comprising:

and the interception termination unit is used for terminating the interception of the sent network signal quality report and terminating the sending of the virtual signal quality report when the call is finished, so that the terminal is recovered to the network used before the call for communication.