CN109474965B

CN109474965B - Network switching method and terminal equipment

Info

Publication number: CN109474965B
Application number: CN201811437165.XA
Authority: CN
Inventors: 李中煌
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-11-28
Filing date: 2018-11-28
Publication date: 2021-01-08
Anticipated expiration: 2038-11-28
Also published as: CN109474965A

Abstract

The invention discloses a network switching method and terminal equipment, which are used for enabling the terminal equipment to be quickly switched to a communication network of a higher version after entering the communication network of a lower version. The method comprises the following steps: completing Circuit Switching (CS) domain registration in an accessed cell; determining whether a cell to be resided is detected, wherein the version of a communication protocol supported by the cell to be resided is higher than the version of the communication protocol supported by an accessed cell; when the cell to be resided is determined to be detected, residing to a target cell to be resided in the cell to be resided; and initiating Packet Switching (PS) domain registration in the target cell to be resided. The method can timely detect the cell to be resided with better network function when the terminal equipment is accessed to the network cell supporting the lower-version communication protocol, and can timely perform network switching once the cell to be resided is detected, thereby shortening the communication time between the terminal equipment and the accessed cell, improving the network function of the terminal equipment and optimizing the network experience.

Description

Network switching method and terminal equipment

Technical Field

The present invention relates to the field of terminals, and in particular, to a network switching method and a terminal device.

Background

With the development and maturity of the LTE technology, most terminal devices perform network communication through the LTE network, and the demand on the GSM network is smaller and smaller. The LTE signal in a part of the area is weak, and when the terminal device is disconnected from the LTE network, the terminal device often enters the GSM network, and tries to reconnect the GSM network after residing in the GSM network.

However, due to the slow speed of the GSM network, the time from the terminal device entering the GSM network to residing in the GSM network is too long, so that once the terminal device is disconnected from the LTE network, it needs to wait for a long time to reconnect the LTE network.

Within the time between the terminal equipment entering the GSM network and reconnecting the LTE network, the network transmission speed of GSM is slow, and the general internet access requirements of the user cannot be met, thereby resulting in poor user experience. How to enable the terminal device to quickly switch to the communication network of the higher version after entering the communication network of the lower version is a technical problem to be solved by the application.

Disclosure of Invention

The embodiment of the application aims to provide a network switching method and terminal equipment, so that the terminal equipment can be quickly switched to a communication network of a higher version after entering a communication network of a lower version.

In a first aspect, a network handover method is provided, which is applied to a terminal device, and includes:

completing Circuit Switching (CS) domain registration in an accessed cell;

determining whether a cell to be camped is detected, wherein the version of a communication protocol supported by the cell to be camped is higher than the version of the communication protocol supported by the accessed cell;

when the cell to be resided is determined to be detected, residing to a target cell to be resided in the cell to be resided;

and initiating Packet Switching (PS) domain registration in the target cell to be resided.

In a second aspect, a terminal device is provided, which includes:

the first register module is used for completing the circuit switching CS domain registration in the accessed cell;

the determining module is used for determining whether a cell to be resided is detected, wherein the version of a communication protocol supported by the cell to be resided is higher than that of a communication protocol supported by the accessed cell;

a residing module, configured to reside to a target cell to be resided in the cell to be resided, if it is determined that the cell to be resided is detected;

and the second registration module initiates Packet Switching (PS) domain registration in the target cell to be resided.

In a third aspect, a terminal device is provided, the terminal device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to the first aspect.

In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, realizes the steps of the method according to the first aspect.

By the scheme provided by the application, when the terminal equipment is accessed to the network cell supporting the lower-version communication protocol, the cell to be resided with better network function is detected in time. The terminal equipment can detect the cell to be resided before PS domain registration, network switching is carried out in time once the cell to be resided is detected, the communication time between the terminal equipment and the accessed cell is shortened, and the cell to be resided with better network functions is accessed as soon as possible. The method and the device avoid that the terminal equipment is in a network environment with poor network function for a long time due to the time delay of the network of the accessed cell and the like, thereby improving the network function of the terminal equipment and optimizing the network experience.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a flowchart illustrating a conventional network handover method.

Fig. 2 is a flowchart illustrating a network handover method according to an embodiment of the present invention.

Fig. 3 is an interaction diagram of a network handover method according to an embodiment of the present invention.

Fig. 4 is a second flowchart illustrating a network handover method according to an embodiment of the invention.

Fig. 5 is a third flowchart illustrating a network handover method according to an embodiment of the present invention.

Fig. 6 is a fourth flowchart illustrating a network handover method according to an embodiment of the present invention.

Fig. 7 is a fifth flowchart illustrating a network handover method according to an embodiment of the invention.

Fig. 8 is a sixth flowchart illustrating a network handover method according to an embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Fig. 10 is a schematic diagram of a hardware structure of a terminal device for implementing various embodiments of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The reference numbers in the present application are only used for distinguishing the steps in the scheme and are not used for limiting the execution sequence of the steps, and the specific execution sequence is described in the specification.

In the field of communications, 4G networks are becoming popular, and terminal devices can perform network communications via the 4G networks, but due to weak signal strength, connection errors, and the like, the terminal devices occasionally disconnect from the 4G networks. When some terminal devices communicate, a '4G + 2G' combined networking mode is adopted for communication, namely, the terminal devices can enter the 2G network after being disconnected with the 4G network, and the combined networking mode can guarantee basic communication requirements of users. Here, 2G refers to a second generation mobile communication technology, and 4G refers to a fourth generation mobile communication technology.

In the existing network handover method, referring to fig. 1, after a terminal device enters a 2G network, a Circuit Switched (CS) domain registration is performed first, where the CS domain registration is a location update process, and the terminal device registers location area information with the 2G network, so that the network side can page the terminal device in the CS domain.

After the CS domain registration is completed, a Packet Switch (Packet Switch or Packet Service, PS) domain registration is performed. The PS domain registration specifically includes a Route Area Update (RAU), and the terminal device registers the Route Area information with the 2G network, so that the network side can page the terminal device in the PS domain. In addition, the PS domain registration also comprises random access, the terminal equipment sends a random access request, and the network side executes the random access to the terminal equipment.

After the random access is successful, the terminal device usually receives the PS domain authentication request, and according to the received authentication request, the terminal device feeds back an authentication code to the network side, and after the network side passes the authentication code authentication, the terminal device receives the RAU registration request of the terminal device, and sends an RAU registration approval message to the terminal device, and then, the terminal device may use the PS domain related function.

After the terminal device completes the registration of the CS domain and the PS domain of the 2G network, i.e., after the terminal device resides in the 2G network, Inter Radio Access Technology (IRAT) is performed to find an accessible 4G network. In the existing communication system, with the popularization of the 4G network, the maintenance of the related facilities of the 2G network is reduced, and compared with the 4G network, the network function provided by the 2G network is poorer, and the terminal device entering the 2G network needs to wait for a longer time to complete the registration of the CS domain and the PS domain and reside in the 2G network, so that the terminal device entering the 2G network cannot quickly reselect back to the 4G network.

Specifically, the terminal device that enters the 2G network may wait for a long time to stay in the 2G network, possibly due to at least one of the following reasons:

1. in the process of PS domain registration of the terminal equipment, an access layer of the terminal equipment initiates a random access request, but random access of a network side fails.

2. After the terminal device succeeds in random access, the PS domain authentication request sent by the network side is not immediately received due to reasons such as long network delay.

3. After receiving the PS domain authentication request and feeding back the authentication response, the terminal device does not immediately receive the RAU registration grant message sent by the network side due to reasons such as long network delay.

For the problems in the prior art, the present application provides a network switching method, where an execution subject may be a terminal device, and a "4G + 2G" joint networking model is taken as an example below for description, and the method is used to enable the terminal device to quickly switch to a communication network of a higher version after entering a communication network of a lower version. Referring to fig. 2, the method provided by the present application includes the steps of:

s21: the circuit switched CS domain registration is done in the accessed cell.

After the CS domain registration is completed in the accessed cell, the terminal device often has a basic 2G communication function, for example, it can perform a call, send and receive a short message through the accessed cell.

S22: determining whether a cell to camp on is detected, wherein the cell to camp on supports a communication protocol of a version higher than that of the accessed cell.

In the "4G + 2G" joint networking model, after the terminal device is disconnected from the 4G network, a 2G network cell is accessed, and the accessed cell may be the 2G network cell in this embodiment. After entering the 2G network cell, the terminal device first performs circuit switched CS domain registration, and after the CS domain registration is completed, the terminal device can use the CS domain related functions of the 2G network. At this time, before the PS domain registration, whether a cell to camp on is detected is determined, wherein the version of the communication protocol supported by the cell to camp on is higher than that supported by the accessed cell.

Specifically, it may be determined whether a cell to be camped is detected through inter-system measurement, and in the "4G + 2G" combined networking model, when the accessed cell is a 2G network cell, the cell to be camped may be a 4G network cell. For other types of networking models, when the accessed cell of the terminal device is a 2G network cell, since the 2G network cell supports the 2G communication protocol, all network cells supporting a communication protocol version higher than the 2G communication protocol can be used as the cell to be camped, for example: a 3G network cell supporting a 3G communication protocol, a 5G network cell supporting a 5G communication protocol, etc.

S23: and under the condition that the cell to be resided is determined to be detected, residing to a target cell to be resided in the cell to be resided.

When the accessed cell of the terminal equipment is a 2G network cell, if an available 4G network cell is detected, the network cell to be resided is determined to be detected. At this time, the terminal device may camp on a target cell to be camped in the cell to be camped through a relevant step of network reselection.

Referring to fig. 3, after entering the 2G network and completing the CS domain registration, the terminal device determines whether a cell to be camped is detected, and when the cell to be camped is detected, performs network reselection on the detected cell to be camped, so as to switch back to the 4G network before the terminal device performs the PS domain registration, without performing the original PS domain registration and other steps shown in the dashed line frame in fig. 3.

S24: and initiating Packet Switching (PS) domain registration in the target cell to be resided.

After residing in the target to-be-resident cell in the to-be-resident cells, performing PS domain registration in the target to-be-resident cell, and in addition, performing other necessary registration steps to enable the terminal device to communicate through the target to-be-resident cell.

Based on the method described in the foregoing embodiment, as shown in fig. 4, the step S22 of determining whether the cell to camp on is detected includes the following steps:

s221: and detecting the broadcast message from the network equipment within a preset time.

Specifically, the cell to be camped may be detected through a correlation step of inter-system measurement, and then it is determined whether the cell to be camped is detected. In this step, the detection time may be preset by a timer, and the starting point of the preset time may be a time when the cell to be camped starts to be detected. For example, if the preset time is 5 seconds, the cell to be camped is started to be detected, the detection lasts for 5 seconds, and then the detection can be stopped, and the corresponding steps are executed according to the detection result of the 5 seconds. The broadcast message may be a message transmitted by the network device in the form of a broadcast. And in a preset time, the terminal equipment receives the broadcast message sent by the network equipment and analyzes the received broadcast message.

S222: and determining whether the cell to be resided is detected or not according to the frequency point information of the cell corresponding to the broadcast message.

The cell corresponding to the broadcast message may specifically refer to a cell that transmits the broadcast message. The terminal equipment can analyze and obtain the frequency point information of the cell sending the broadcast message according to the received broadcast message. According to the frequency point information of the cell sending the broadcast message, whether the communication function provided by the cell corresponding to the broadcast message is better than the communication function provided by the accessed cell can be further determined. When the detected cell corresponding to the broadcast message can provide a better communication function, it may be determined that the cell to camp on is detected.

The scheme provided by the application can determine whether the cell to be resided is detected or not by detecting the broadcast message from the network equipment within the preset time. Whether the cell can provide a better communication function can be indirectly known by analyzing the frequency point information of the cell corresponding to the broadcast message, so that network switching can be performed in a reselection mode and the like. In addition, if the cell to be camped is not detected within the preset time, PS registration can be continued in the accessed cell, and the cell can be camped in the accessed cell temporarily. According to the scheme, the broadcast message from the network equipment is detected within the preset time, so that long-time continuous detection can be avoided, the influence on PS registration is avoided, and the basic communication function of the terminal equipment in the accessed cell is ensured.

Preferably, based on the method described in the foregoing embodiment, as shown in fig. 5, the step S222 includes the following steps:

s2221: and determining the residence priority of the cell corresponding to the broadcast message according to the frequency point information of the cell corresponding to the broadcast message.

Under a general condition, the terminal device may analyze the frequency point information of the cell sending the broadcast message according to the received broadcast message, and then analyze the retention priority according to the frequency point information of the cell. The parking priority may particularly refer to a public priority. In addition, if the received broadcast message includes the dedicated priority, the dedicated priority may also be determined as the camping priority of the cell corresponding to the broadcast message.

Specifically, a plurality of residence priorities may be pre-divided according to the network functions of the network cell to form a residence priority standard, such as: the residence priority of the 2G network cell is 1, the residence priority of the 3G network cell is 2, the residence priority of the 4G network cell is 3, and so on. In addition, for network cells supporting the same network protocol, a plurality of residence priorities can be further divided according to the standards of network signal strength, network functions and the like.

S2222, when there is a cell with a higher camping priority than that of the accessed cell in the cell corresponding to the broadcast message, determining that the cell to be camped is detected.

After determining the camping priority of the cell corresponding to the broadcast message through the step S2221, comparing the detected camping priority of the cell with the camping priority of the accessed cell. For example, if the accessed cell is a 2G network cell, the camping priority of the accessed cell is 1 according to the camping priority standard divided in the above embodiment. When the detected cell is a 4G network cell, the camping priority of the cell corresponding to the broadcast message is 3. At this time, a cell with a higher camping priority than that of the accessed cell exists in the cells corresponding to the broadcast message, and it is determined that the cell to be camped is detected, where the cell to be camped may be a detected 4G network cell.

The technical scheme provided by the application determines the residing priority of the cell sending the broadcast message according to the received broadcast message, and further determines whether the cell to be resided is detected according to the residing priority. The network function of the cell can be known according to the residence priority. The cell with higher residence priority can provide better network function, and the cell with lower residence priority can provide poorer network function, so that whether the detected cell can provide better network function than the existing cell can be known according to the residence priority. When the detected cell can provide a better network function, the cell to be resided is determined to be detected, and then the terminal equipment can be switched to the detected cell with higher residence priority through modes such as network reselection and the like, so that the terminal equipment is in a better network environment, and the network experience is optimized.

Based on the method in the foregoing embodiment, as shown in fig. 6, when the number of the cells to camp on is multiple, the method further includes the following steps:

s25: and determining the target cell to be resided according to the number of the cells to be resided with the highest residence priority in the plurality of network cells to be resided.

Step S25 provided in the present application may be executed before the terminal device camps on a target cell to be camped in the cells to be camped.

In general, when a terminal device detects a broadcast message from a network device, it can detect multiple broadcast messages, and different broadcast messages often come from different network devices. Through the analysis, a plurality of cells to be camped can be analyzed.

For example, the accessed cell is a 2G network cell, and the camping priority is 1. The detected cells to be resided comprise a 3G network cell with a residence priority of 2 and a 4G network cell with a residence priority of 3. At this time, the cell to be camped with the highest camping priority is the 4G network cell. The number of the cells to be resided with the highest residence priority is 1, and at this time, the detected only one cell to be resided (4G network cell) with the highest residence priority is determined as a target cell to be resided.

According to the scheme provided by the application, when a plurality of cells to be resided are detected, the screening can be further realized according to the priority of the network cells to be resided, so that the network cells capable of providing the optimal network function are obtained, and the network cells capable of providing the optimal network function are determined as the target cells to be resided. And then, network switching can be performed through modes such as network reselection and the like, so that the terminal equipment can use better network functions and optimize network experience.

Based on the method in the above embodiment, when the number of the cells to be camped with the highest camping priority is greater than 1, the cells to be camped with the highest camping priority may be further analyzed, network cells meeting actual requirements are screened out, and the screened out only one optimal cell to be camped is determined as the target cell to be camped.

For example: through the above analysis, the cell to be camped includes the 4G network cell a with the camping priority of 3 and the 4G network cell B with the camping priority of 3. At this time, the number of the cells to be camped with the highest camping priority is multiple, as shown in fig. 7, the step S23 may include the following steps:

s251: and determining the reselection difficulty degree of the cells to be camped with the highest camping priority.

Specifically, for a plurality of cells to be camped with the highest priority, the terminal device may further analyze the reselection difficulty levels of the 4G network cell a and the 4G network cell B, where the reselection difficulty levels may be parameters related to reselection obtained by comprehensive analysis of various signal parameters. For example, according to cell signal strength, signal quality, and the like, the 4G network cell a and the 4G network cell B may be compared, and a cell to be camped, which is easier to reselect, may be determined as a cell to be camped, which has the lowest difficulty in reselection.

S252: and determining the cell to be resided with the lowest reselection difficulty degree as the target cell to be resided.

The reselection difficulty degree can represent the reselection speed and the reselection success rate, and the cell to be resided with the lowest reselection difficulty degree is the cell with high reselection speed and high success rate.

By analyzing the reselection difficulty of a plurality of cells, the cell to be resided which is easier to reselect can be obtained. And determining the cell to be resided with the lowest reselection difficulty degree as a target cell to be resided, and then reselecting the terminal equipment to the target cell to be resided in a reselection mode and the like. Through the steps, the terminal equipment can be reselected to the cell which has the highest priority and is most easily reselected. On one hand, the terminal equipment is ensured to be in a better network environment after reselection, and on the other hand, the reselection process is ensured to be fast and the reselection success rate is high.

Based on the method described in the foregoing embodiment, in the case that the cell to be camped is not detected, as shown in fig. 8, the method further includes the following steps:

s26: determining whether the cell to camp on is detected before receiving the PS domain authentication request.

Referring to fig. 3, the terminal device may continue to perform the steps shown in the dashed box in case that the cell to camp on is not detected. The PS domain registration request sent by the terminal device to the network device may specifically include an RAU registration request and a random access request. After the random access is successful, before the terminal equipment receives a PS domain authentication request sent by the network equipment, whether a cell to be resided is detected or not is determined.

In the scheme, when whether the cell to be camped is detected is determined for the first time, the terminal device may not be in the coverage of the cell to be camped, and then the terminal device may move into the coverage of the cell to be camped. Therefore, after the cell to be camped is not detected in the first detection process, the cell to be camped may be detected in the subsequent detection process.

Specifically, the method step of determining whether the cell to be camped is detected may include any method step described in the above embodiments, which is not described herein again.

S27: and under the condition that the cell to be resided is determined to be detected, residing to a target cell to be resided in the cell to be resided.

Specifically, the method step of camping on the target cell to be camped in the cell to be camped may include any one of the method steps described in the above embodiments, and details are not described here.

According to the technical scheme, after the terminal equipment completes CS domain registration and under the condition that the cell to be resided is not detected, whether the cell to be resided is detected can be determined again after PS domain registration is started. Because the position of the terminal equipment is likely to move continuously, before the terminal equipment completely resides in the accessed cell, whether the cell to be resided is detected or not is determined for a plurality of times, the possibility of detecting the cell to be resided can be improved to a certain extent, and the probability of executing network switching is increased.

Compared with the prior art, the scheme provided by the application can determine whether the cell to be resided is detected or not before the terminal equipment completely resides in the accessed network, and the network switching is performed once the cell to be resided is detected, so that the terminal equipment is prevented from residing in a cell with a lower version for a long time, the network switching is realized, and the network experience is optimized.

In order to solve the problems in the prior art, the present application further provides a terminal device, as shown in fig. 9, where the terminal device 90 includes:

a first registration module 91, configured to complete circuit switched CS domain registration in an accessed cell;

a determining module 92, configured to determine whether a cell to camp on is detected, where a version of a communication protocol supported by the cell to camp on is higher than a version of a communication protocol supported by the accessed cell;

a camping module 93, configured to camp on a target cell to be camped in the cell to be camped, if it is determined that the cell to be camped is detected;

and a second registration module 94, initiating packet switched PS domain registration in the target cell to be camped.

Based on the terminal device 90, the determining module 92 includes:

a detection module 921, configured to detect a broadcast message from a network device within a preset time;

a resident cell determining module 922, configured to determine whether the cell to be resident is detected according to the frequency point information of the cell corresponding to the broadcast message.

Based on the terminal device 90, the camping cell determining module 922 is configured to:

determining the residence priority of the cell corresponding to the broadcast message according to the frequency point information of the cell corresponding to the broadcast message;

and determining to detect the cell to be camped when a cell with a camping priority higher than that of the accessed cell exists in the cell corresponding to the broadcast message.

Based on the terminal device 90, when the number of the cells to be camped is multiple, the camped cell determining module 922 is further configured to:

and determining the target cell to be resided according to the number of the cells to be resided with the highest residence priority in the plurality of network cells to be resided.

Based on the terminal device 90, the number of the cells to be camped with the highest camping priority is multiple;

the camping cell determining module 922 is further configured to:

determining reselection difficulty degrees of a plurality of cells to be camped with the highest camping priority;

and determining the cell to be resided with the lowest reselection difficulty degree as the target cell to be resided.

Based on the terminal device 90, in the case that the cell to be camped is not detected, the determining module 92 is further configured to:

determining whether the cell to be camped is detected before receiving the PS domain authentication request;

wherein the resident module 93 is further configured to:

and when the determining module determines that the cell to be resided is detected, camping to a target cell to be resided in the cell to be resided.

Fig. 10 is a schematic diagram of a hardware structure of a terminal device for implementing various embodiments of the present invention, where the terminal device 1000 includes, but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009, a processor 1010, and a power supply 1011. Those skilled in the art will appreciate that the terminal device configuration shown in fig. 10 is not intended to be limiting, and that terminal devices may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

Wherein, the processor 1010 is configured to complete circuit switched CS domain registration in the accessed cell;

It should be understood that, in the embodiment of the present invention, the radio frequency unit 1001 may be used for receiving and sending signals during a message transmission or a call, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 1010; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 1001 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. Further, the radio frequency unit 1001 may also communicate with a network and other devices through a wireless communication system.

The terminal device provides the user with wireless broadband internet access through the network module 1002, such as helping the user send and receive e-mails, browse webpages, access streaming media, and the like.

The audio output unit 1003 may convert audio data received by the radio frequency unit 1001 or the network module 1002 or stored in the memory 1009 into an audio signal and output as sound. Also, the audio output unit 1003 can also provide audio output related to a specific function performed by the terminal apparatus 1000 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 1003 includes a speaker, a buzzer, a receiver, and the like.

The input unit 1004 is used to receive an audio or video signal. The input Unit 1004 may include a Graphics Processing Unit (GPU) 10041 and a microphone 10042, the Graphics processor 10041 Processing image data of still pictures or video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 1006. The image frames processed by the graphic processor 10041 may be stored in the memory 1009 (or other storage medium) or transmitted via the radio frequency unit 1001 or the network module 1002. The microphone 10042 can receive sound and can process such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 1001 in case of a phone call mode.

Terminal device 1000 can also include at least one sensor 1005, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 10061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 10061 and/or backlight when the terminal device 1000 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal device posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 1005 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which will not be described in detail herein.

The display unit 1006 is used to display information input by the user or information provided to the user. The Display unit 1006 may include a Display panel 10061, and the Display panel 10061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 1007 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal device. Specifically, the user input unit 1007 includes a touch panel 10071 and other input devices 10072. The touch panel 10071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 10071 (e.g., operations by a user on or near the touch panel 10071 using a finger, a stylus, or any other suitable object or attachment). The touch panel 10071 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 1010, and receives and executes commands sent by the processor 1010. In addition, the touch panel 10071 may be implemented by various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 10071, the user input unit 1007 can include other input devices 10072. Specifically, the other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a track ball, a mouse, and a joystick, which are not described herein again.

Further, the touch panel 10071 can be overlaid on the display panel 10061, and when the touch panel 10071 detects a touch operation thereon or nearby, the touch operation is transmitted to the processor 1010 to determine the type of the touch event, and then the processor 1010 provides a corresponding visual output on the display panel 10061 according to the type of the touch event. Although in fig. 10, the touch panel 10071 and the display panel 10061 are two independent components for implementing the input and output functions of the terminal device, in some embodiments, the touch panel 10071 and the display panel 10061 may be integrated to implement the input and output functions of the terminal device, and the implementation is not limited herein.

The interface unit 1008 is an interface for connecting an external device to the terminal apparatus 1000. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. Interface unit 1008 can be used to receive input from external devices (e.g., data information, power, etc.) and transmit the received input to one or more elements within terminal apparatus 1000 or can be used to transmit data between terminal apparatus 1000 and external devices.

The memory 1009 may be used to store software programs as well as various data. The memory 1009 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, and the like), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 1009 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 1010 is a control center of the terminal device, connects various parts of the entire terminal device by using various interfaces and lines, and performs various functions of the terminal device and processes data by operating or executing software programs and/or modules stored in the memory 1009 and calling data stored in the memory 1009, thereby performing overall monitoring of the terminal device. Processor 1010 may include one or more processing units; preferably, the processor 1010 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 1010.

Terminal device 1000 can also include a power source 1011 (e.g., a battery) for powering the various components, and preferably, power source 1011 can be logically coupled to processor 1010 through a power management system that provides management of charging, discharging, and power consumption.

In addition, the terminal device 1000 includes some functional modules that are not shown, and are not described herein again.

Preferably, an embodiment of the present invention further provides a terminal device, which includes a processor 1010, a memory 1009, and a computer program stored in the memory 1009 and capable of running on the processor 1010, where the computer program is executed by the processor 1010 to implement each process of the foregoing network handover method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again.

The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the above-mentioned network handover method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

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

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

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A network switching method is applied to terminal equipment and is characterized by comprising the following steps:

completing Circuit Switching (CS) domain registration in an accessed cell;

initiating Packet Switching (PS) domain registration in the target cell to be resided;

wherein, in case that the cell to camp on is not detected, after the determining whether the cell to camp on is detected, the method further comprises:

and under the condition that the cell to be resided is determined to be detected, residing to a target cell to be resided in the cell to be resided.

2. The method of claim 1, wherein the determining whether the cell to camp on is detected comprises:

detecting a broadcast message from a network device within a preset time;

and determining whether the cell to be resided is detected or not according to the frequency point information of the cell corresponding to the broadcast message.

3. The method of claim 2, wherein the determining whether the cell to be camped is detected according to the frequency point information of the cell corresponding to the broadcast message comprises:

4. The method of claim 3, wherein the number of the to-camp cells is plural, and after the determining detects the to-camp cell, the method further comprises:

5. The method of claim 4, wherein the number of the cells to camp on with the highest camping priority is plural;

wherein, the determining the target cell to be camped according to the number of the cells to be camped with the highest camping priority in the plurality of network cells to be camped includes:

6. A terminal device, comprising:

the second registration module initiates Packet Switching (PS) domain registration in the target cell to be resided;

wherein, in the case that the cell to camp on is not detected, after the determining whether the cell to camp on is detected, the determining module is further configured to:

wherein the resident module is further to:

7. The terminal device of claim 6, wherein the determining module comprises:

the detection module is used for detecting the broadcast message from the network equipment within the preset time;

and a resident cell determining module, configured to determine whether the cell to be resident is detected according to the frequency point information of the cell corresponding to the broadcast message.

8. The terminal device of claim 7, wherein the camped cell determination module is configured to:

9. The terminal device of claim 8, wherein when the number of the to-camp cells is multiple, after the determination detects the to-camp cell, the camp cell determination module is further configured to:

10. The terminal device according to claim 9, wherein the number of the cells to camp on with the highest camping priority is plural;

the camped cell determination module is further configured to:

11. A terminal device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method according to any one of claims 1 to 5.

12. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1-5.