CN105898812A - A method and device for fast network fallback - Google Patents

Abstract

The invention discloses a method and device for quickly falling back to the network to solve the problems of high failure probability and low autonomous FR performance when falling back to the LIE network at the end of the existing CSFB voice call. When the terminal accesses the first network that does not support voice services, it saves the multiple frequency point information measured under the first network as the first frequency point set information; when it needs to initiate a voice service, it falls back to support voice the second network of the service, and obtain change information representing the change of the terminal location in the second network; when the change information satisfies the set condition, measure the received frequency point in the first network, Update the first frequency point set information; when the voice service ends, based on the newly saved first frequency point set information FR to the first network, so that it can avoid that the frequency point to which the voice service release area belongs is not included in the memory of the original terminal The problems that lead to FR failure in the frequency point can improve the performance of autonomous FR.

Description

A method and device for fast network fallback

technical field

The present invention relates to the field of wireless technology, in particular to a method and device for fast fallback network.

Background technique

The LTE (Long Term Evolution, long-term evolution) network adopts an all-IP (Internet Protocol, interconnection protocol) structure, and there is no CS (Circuit Switched, circuit switching) domain, and there is insufficient support for voice services. Therefore, CSFB (Circuit Switched Fallback, circuit domain fallback) solution came into being.

CSFB is a single-standby working mode. After the terminal is powered on, it is preferred to reside on the LTE network. When there is a voice service, it will fall back to the 2G/3G circuit domain for execution through CSFB technology. Fallback) technology quickly returns to the LTE network, and the data service does not need to be dropped, so that not only the continuity of the voice service can be realized, but also the continuity of the data service can be realized.

When the terminal returns to the LTE network through the autonomous FR process, the fewer LTE frequencies need to be searched, and the more consistent the searched frequency points are with the frequency points of the cell and neighboring cells, the better the FR function and the faster the return. Therefore, how to obtain closer FR return frequency point information with the minimum cost is the key to the autonomous FR function.

A solution in the prior art is that, as shown in Figure 1, during a CSFB voice call, the terminal periodically measures the LTE frequency points in the broadcast message one by one, and judges according to the latest measurement result when the voice service is hung up. Whether a suitable LTE cell is measured at the end of the voice service. If there is an LTE cell that meets the conditions, the autonomous FR process is triggered after the Channel Release (channel release) message is sent on the network side, and the previously measured LTE frequencies that meet the conditions are used. The information tries to return to the corresponding LTE cell; if there is no suitable LTE cell to camp on after the Channel Release message, or fails to return to the LTE cell after FR triggering, it will still camp on the cell where the original CSFB service resides.

In this solution, the terminal periodically measures the LTE frequency points one by one during the CSFB call. This periodic and frequent LTE frequency point measurement will not only increase the power consumption of the terminal; if the terminal talk time after CSFB is very short, or If the abnormal release occurs within a short period of time, it may be too late to measure the LTE frequency point or no effective LTE frequency point can be detected, resulting in autonomous FR failure.

Another solution in the prior art is, as shown in Figure 2, when the CSFB voice service ends, after the network sends a Channel Release message, the terminal will Frequency point information, try to trigger the autonomous FR to return to the LTE cell. If a suitable LTE cell is measured within the specified time, try to access the LTE cell; if the attempt to access the LTE cell fails, or fails to measure a suitable LTE cell, it will still camp in the original CSFB service cell.

In this solution, the autonomous FR frequency depends on the accumulated memory frequency in the past, and the nearby situation cannot be fed back in time. After FR is triggered, it depends on the frequency search. If the LTE cell to which the voice service release area belongs FR will fail; if the terminal memorizes too many LTE frequencies, it may not be able to scan all LTE frequencies within the specified time, resulting in FR failure. The risk of searching for cells by memorizing frequency points will gradually increase, leading to an increase in the probability of FR failure.

Contents of the invention

Embodiments of the present invention provide a method and device for quickly falling back to the network to solve the problems of high failure probability and low autonomous FR performance when falling back to the LIE network at the end of the existing CSFB voice call.

The specific technical scheme that the embodiment of the present invention provides is as follows:

In the first aspect, the embodiment of the present invention provides a method for quickly falling back to the network, including:

When the terminal accesses the first network that does not support the voice service, save the multiple frequency point information measured under the first network as the first frequency point set information;

When the terminal needs to initiate a voice service, it falls back to a second network that supports voice services based on CSFB, and obtains change information representing a change in the terminal's location in the second network;

When the change information satisfies the set condition, the terminal measures the frequency point in the first network received by the terminal when the terminal is in the second network, and based on the measurement result, the The information of the first frequency point set is updated;

When the voice service ends, the terminal FRs to the first network based on the latest stored first frequency point set information.

Since, after the terminal moves from the first network CSFB to the second network, it judges whether the terminal has a large-scale location change through cell handover or the signal change difference of the pilot signal, and starts the first The frequency point measurement of the network, and update the frequency point information of the first network saved by the terminal, and try to ensure that the latest frequency point information of the first network saved by the terminal is consistent with the cell frequency of the first network where the terminal is located when the voice service is released. The points are the same or close to avoid the problem of FR failure when the frequency point of the cell of the first network to which the voice service release area belongs is not included in the frequency point of the first network memorized by the terminal.

On the basis of the first aspect, optionally, the change information includes:

Information about cell handover of the terminal; and/or

The signal change difference of the serving cell where the terminal is located within the set time period.

On the basis of the first aspect, optionally, when the change information satisfies the set condition, the terminal measures the frequency points in the first network received by the terminal when the terminal is in the second network , and updating the first frequency point set information based on the measured results, including:

When the terminal is in the second network when the cell handover occurs or the signal change difference of the serving cell where the terminal is located exceeds the preset threshold within the set time period, the terminal receives the information in the first network when the terminal is in the second network. The frequency point is measured, and the multiple frequency point information obtained by the measurement is used as the second frequency point set information

The terminal updates the stored first frequency point information to the second frequency point information.

On the basis of the first aspect, optionally, when the voice service ends, the terminal quickly falls back to FR to the first network based on the latest stored first frequency point set information, including:

When the voice service ends, the terminal determines the frequency points that meet the preset conditions in the latest saved information of the first frequency point set, and tries to quickly fall back to the first network by FR based on the determined frequency points.

On the basis of the first aspect, optionally, the signal change difference is a signal quality change difference or a signal level change difference.

In the second aspect, a device for quickly falling back to the network is provided, and the device is applied to a terminal, including:

A storage unit, configured to store a plurality of frequency point information measured under the first network as first frequency point set information when accessing a first network that does not support voice services;

An acquisition unit, configured to fall back to a second network supporting voice services based on CSFB when a voice service needs to be initiated, and acquire change information representing a change in the location of the terminal in the second network;

a measuring unit, configured to measure the frequency points in the first network received by the terminal when the terminal is in the second network when the change information satisfies a set condition, and measure the frequency points in the first network based on the measurement results The information of the first frequency point set is updated;

The processing unit is configured to FR to the first network based on the latest stored first frequency point set information when the voice service ends.

On the basis of the second aspect, optionally, the change information includes:

Information about cell handover of the terminal; and/or

The signal change difference of the serving cell where the terminal is located within the set time period.

On the basis of the second aspect, optionally, when the change information satisfies the set condition, when the terminal is in the second network, the frequency point in the first network received by the terminal is performed When performing measurement, and updating the information of the first frequency point set based on the results obtained from the measurement, it is specifically used for:

When a cell handover occurs or the signal change difference of the serving cell within the set duration exceeds a preset threshold, the frequency point in the first network received by the terminal when the terminal is in the second network Perform measurement, and use the measured frequency point information as the second frequency point set information

updating the stored first frequency point information to the second frequency point information.

On the basis of the second aspect, optionally, when the voice service ends, the processing unit is specifically configured to:

When the voice service ends, frequency points that meet the preset conditions are determined in the latest stored information of the first frequency point set, and based on the determined frequency points, an attempt is made to quickly fall back to the first network by FR.

On the basis of the second aspect, optionally, the signal change difference is a signal quality change difference or a signal level change difference.

In a third aspect, a terminal is provided, including

a memory in which program instructions are stored;

at least one processor for executing said program instructions;

The program instructions include:

When accessing the first network that does not support the voice service, saving the multiple frequency point information measured under the first network as the first frequency point set information;

When it is necessary to initiate a voice service, fall back to a second network that supports voice services based on CSFB, and acquire change information used to represent a change in the location of the terminal in the second network;

When the change information satisfies the set condition, measure the frequency point in the first network received by the terminal when the terminal is in the second network, and measure the first frequency point based on the measurement result The point set information is updated;

When the voice service ends, FR to the first network based on the latest stored first frequency point set information.

An embodiment of the present invention provides a solution for fast network fallback. The method is that when a terminal accesses a first network that does not support voice services, it uses the information of multiple frequency points measured under the first network as the first frequency Save the point set information; when it is necessary to initiate a voice service, fall back to the second network that supports the voice service, and obtain change information representing the change of the terminal location in the second network; when the change information satisfies the set condition, measure the received frequency points in the first network, and update the first frequency point set information; when the voice service ends, FR the first frequency point set information based on the latest preservation to the first network, so that , which can avoid the problem that the frequency point to which the voice service release area belongs is not included in the frequency point memorized by the original terminal, resulting in FR failure, and improve the performance of autonomous FR; prevent the terminal from frequently initiating the measurement of the cell frequency point of the first network during the voice service process , to reduce the power consumption of the terminal.

Description of drawings

FIG. 1 is a schematic diagram of a process from FR to LTE network in the prior art;

FIG. 2 is a schematic diagram of a process from FR to LTE network in the prior art;

Fig. 3 is the signaling flowchart of terminal initiating CSFB calling;

Fig. 4 is the signaling flowchart of terminal receiving CSFB caller;

FIG. 5 is a flowchart of a method for fast fallback network in an embodiment of the present invention;

6 is a flowchart of a method for quickly falling back to an LTE network from a 2G/3G network in an embodiment of the present invention;

FIG. 7 is a schematic diagram of a device structure of a fast fallback network in an embodiment of the present invention;

FIG. 8 is a schematic diagram of a terminal structure in an embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiments of the present invention provide a method and device for quickly falling back to the network to solve the problems of high failure probability and low autonomous FR performance when falling back to the LIE network at the end of the existing CSFB voice call. Wherein, the method and the device are based on the same inventive concept, and since the principles of the method and the device to solve problems are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Taking the LTE system as an example, after the LTE single-waiting terminal attaches to the LTE network, it resides in the LTE network and cannot send and receive CS domain service signals. In order to enable the terminal to initiate CS services such as voice and receive CS services such as voice Service paging adopts CSFB technology, that is, when a terminal covered by the LTE network processes voice services, the terminal first falls back to the CS domain network, processes voice services on the CS domain network, and then returns to the LTE network after the service is completed. The specific process can be referred to as shown in FIG. 3 .

Referring to FIG. 3, FIG. 3 shows a signaling flow chart of a terminal initiating a CSFB call.

S31: The terminal sends an ESR (Extended Service Request) message to an MME (Mobility Management Entity, mobility management entity) through the eNodeB, and the ESR message includes a CSFB indication.

S32: After receiving the ESR message, the MME sends an S1-AP (S1ApplicationProtocol, S1 application layer protocol) request message to the eNodeB to the eNodeB. The message contains a CS FallbackIndicator (circuit domain fallback indication), which is used to indicate the eNodeB. Fallback services need to fall back to UTRAN (Evolved Universal Terrestrial Radio Access Network, Evolved Universal Terrestrial Radio Access Network)/GERAN (SM EDGE Radio Access Network, GSM (Global System for Mobile communication, Global System for Mobile Communications)/EDGE (Enhanced DataRate for GSM Evolution, enhanced data rate GSM evolution technology) radio access network).

S33: The eNodeB sends an RRC (Radio Resource Control, radio resource control) connection release message to the terminal, requiring the terminal to start inter-system cell measurement, obtain a measurement report reported by the terminal, and determine the redirected target system cell. Then send specific wireless configuration information of the target system to the terminal, and release the RRC connection.

S34: The terminal accesses the target system cell, and initiates a CM service request (CM (Connection Management, connection management) service request) in the CS domain.

S35: If the MSC (Mobile Switching Center, Mobile Switching Center) to which the target system cell belongs is different from the MSC registered when the terminal attaches to the EPS (Evolved Packet System, Evolved Packet System) network, then when the MSC receives the terminal's CM service request , since there is no information about the terminal, 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 (that is, the serving MSC is different from the MSC registered with the EPS/IMSI (International Mobile Subscriber Identification Number, International Mobile Subscriber Identification Number), reject the user's CM service request. If the MSC rejects the user's CM service request, the terminal will initiate a CS domain location update procedure.

S36: a voice call establishment process in the CS domain.

Referring to FIG. 4, FIG. 4 shows a signaling flow chart of a terminal receiving a CSFB called party.

S41: After receiving the IAM (Initial Address Message) sent by the calling terminal, the MSC sends a paging request message according to the existing SGs association and MME information, such as sending a SGsAP-PAGING-REQUEST message (carrying IMSI, TMSI (Temporary MobileSubscriber Identity, temporary identification code), Service indicator (service indication), calling number, location area information) message to MME.

S42: The MME sends a Paging (paging) message to the eNodeB, and the eNodeB initiates a Paging process of the air interface.

S43: The terminal establishes a connection and sends an ESR message to the MME.

S44: The MME sends a SGsAP-SERVICE-REQUEST message to the MSC. After receiving this message, the MSC will not resend the paging request message to the MME. In order to prevent the calling terminal from waiting too long during the call connection process, the MSC will first notify the calling terminal that the call is in the process of being connected after receiving the SGs Service Request message containing the idle state indication.

S45: The MME sends an Initial UE Context Setup (initial UE context setup) message to the eNodeB, and the message includes the CS Fallback Indicator. It is used to indicate to the eNodeB that the terminal needs to fall back to UTRAN/GERAN due to the CSFallback service.

S46: The terminal switches from E-UTRAN to UTRAN/GERAN.

S47: With the establishment of the air interface and A/Iu-CS interface connection, the terminal returns a paging response (paging response) message to the MSC. Even if the RNC has not initiated a paging request to the terminal, the RNC here needs to be able to process the paging response of the terminal. If the location area information in the paging response message is inconsistent with that stored in the VLR (Visitor Location Register, visitor location register), the VLR will set the SGs association as NULL (empty) after the authentication is successful.

S48: After receiving the paging response message from the terminal, the MSC stops the paging response timer and establishes a CS connection.

The embodiment of the present invention is applied in the scenario where the terminal autonomously FRs to the LTE network after falling back to the CS domain through CSFB for voice services, obtains the location change information of the terminal during a voice call after CSFB, and determines whether to trigger based on the location change information of the terminal For LTE frequency point measurement, improve the effectiveness of frequency point measurement, reduce unnecessary and frequent LTE frequency point measurement, improve the speed and accuracy of autonomous FR to LTE network, and further reduce terminal power consumption.

Referring to FIG. 5, FIG. 5 is a flow chart of a method for quickly falling back to the network in an embodiment of the present invention, and the specific process is:

Step 500: When the terminal accesses the first network that does not support the voice service, save the multiple frequency point information measured under the first network as the first frequency point set information.

Optionally, the first network is an LTE network.

Step 501: When the terminal needs to initiate a voice service, it falls back to a second network supporting the voice service based on CSFB, and acquires change information representing a change of the terminal location in the second network.

Optionally, the second network is a UTRAN network or a GERAN network.

The change information includes: information about cell handover of the terminal; and/or a signal change difference of the serving cell where the terminal is located within a set duration. Wherein, the signal change difference is a signal quality change difference or a signal level change difference.

Step 502: When the change information satisfies the set condition, the terminal measures the frequency points in the first network received by the terminal when the terminal is in the second network, and based on the measurement results The information of the first frequency point set is updated.

Specifically, when the change information satisfies the set condition, the terminal measures the frequency point in the first network received by the terminal when the terminal is in the second network, and based on the measurement result The above-mentioned first frequency point set information is updated, and the specific process is as follows:

When the terminal is in the second network when the cell handover occurs or the signal change difference of the serving cell where the terminal is located exceeds the preset threshold within the set time period, the terminal receives the information in the first network when the terminal is in the second network. The frequency point is measured, and the multiple frequency point information obtained by the measurement is used as the second frequency point set information

The terminal updates the stored first frequency point information to the second frequency point information.

Step 503: When the voice service ends, the terminal FRs to the first network based on the latest stored first frequency point set information.

Specifically, when the voice service ends, the terminal quickly falls back to FR to the first network based on the latest stored first frequency point set information, and the specific process is:

When the voice service ends, the terminal determines frequency points that meet preset conditions in the latest saved information of the first frequency point set, and tries to FR to the first network based on the determined frequency points.

In this embodiment, after the terminal moves from the first network CSFB to the second network, it judges whether the terminal has a large-scale location change through cell handover or the signal change difference of the pilot signal. When a large-scale location change occurs Start the frequency point measurement of the first network, and update the frequency point information of the first network saved by the terminal, and try to ensure that the latest frequency point information of the first network saved by the terminal is the same as the first network where the terminal is in when the voice service is released The frequency points of the cell are the same or close to avoid the problem of FR failure when the frequency point of the cell of the first network to which the voice service release area belongs is not included in the frequency point of the first network memorized by the terminal; to avoid the problem that the terminal is performing voice services Frequently initiate the measurement of the cell frequency of the first network in order to reduce the power consumption of the terminal, especially when the user remains still or moves slightly during the call; even if the terminal has a short call time after CSFB, or is abnormal for a short time Release, it is too late to measure the frequency of the first network, the frequency information of the first network saved by CSFB can still be used as autonomous FR to trigger FR to the first network; avoid too many frequencies of the first network accumulated by the terminal, shorten The frequency scanning process increases the success probability of independent FR; it is beneficial to reduce the probability of data service quality reduction caused by the data service introduced during the frequency point measurement of the first network while the voice service process is in progress.

In the following, the first network is an LTE network, and the second network is a 2G (the second generation, second generation mobile communication technology) network or a 3G (the third generation, third generation mobile communication technology) network as an example to describe in detail the The method for quickly falling back to the network, the specific process is shown in Figure 6.

Step 61: When the terminal camps in the LTE cell, save the measured LTE frequency point information in order of reference signal level or quality (N can be taken, and N is a positive integer) as the first LTE frequency point set information.

Step 62: When the terminal initiates a CSFB call process, the terminal sends an ESR message to the MME on the network side. The ESR message contains a CSFB indication, which triggers the network side to initiate a CSFB Service Request (CSFB service request) process, so that the terminal falls back to 2G or 3G The cell performs voice services.

Step 63: The terminal obtains change information used to characterize the change of the terminal location during the voice call.

Specifically, the terminal judges whether a cell handover has occurred (the behavior of the network controlling the terminal to enter another cell from one cell in the connected state), or whether the difference of the pilot signal change measured in the current 2G or 3G serving cell exceeds the preset value. Set the value to determine whether the terminal has performed a large-scale location change, thereby deciding whether to initiate reference signal measurement of the LTE frequency point.

In an optional implementation manner, the signal change difference exceeding the preset threshold value may be judged through the following process:

S1. Based on the pilot signal level value or quality value measured during the terminal returning to the 2G or 3G voice call, calculate the average value within the time period of ΔT (for example, a total of 3 pilot signal measurement durations);

S2. Based on the above average value as the basic anchor point value M1, and set a certain threshold value threshold as a comparison, if within the time Δt, the difference between the measured signal quality M and the basic anchor point value M1 is always greater than is equal to the comparison threshold value threshold, then immediately start the reference signal measurement of the LTE frequency point;

S3. After the reference signal measurement of the LTE frequency point is started, the above-mentioned basic anchor point value M1 is re-measured and calculated, and the above-mentioned decision process of S1-S2 is repeated.

Step 64: If the terminal determines that cell handover has occurred during the call, execute step 66; otherwise, continue to execute step 63.

Step 65: If the signal change difference of the pilot signal measured by the terminal exceeds the preset threshold value, execute step 66; otherwise, continue to execute step 63.

Step 66: Start the reference signal measurement of the LTE frequency point, and store the measured LTE frequency point information in order of reference signal level or quality (N can be taken, N is a positive integer) and stored as the second LTE frequency point set information .

Step 67: Compare the above-mentioned second LTE frequency point set information with the previously saved first LTE frequency point information, if consistent, do not update, continue to step 69; if not consistent, perform step 68.

Step 68: Update the saved first LTE frequency point information to the second LIE frequency point set information.

Step 69: When the voice service ends, the terminal decides whether to initiate an autonomous FR process to return to the LTE network based on the latest stored information about the first LTE frequency point set. If the FR process is initiated, the base station sends a CHANNEL_RELEASE (channel release) message (release 2G or 3G channel), preferentially use the latest stored information of the first LTE frequency point set, and preferentially search or return to the cells of these LTE frequency points. In this way, the problem of FR failure caused by the fact that the LTE cell belonging to the voice service release area is not included in the LTE frequency point memorized by the terminal is avoided, and the terminal frequently initiates measurement of the LTE cell frequency point during the voice service process, reducing the power consumption of the terminal.

Based on the fast fallback network method provided in the above embodiments, referring to FIG. 7, an embodiment of the present invention provides a fast fallback network device 700, which is applied to a terminal. FIG. 7 shows the method provided by the embodiment of the present invention A schematic structural diagram of a device 700, as shown in FIG. 7, the device 700 includes a storage unit 701, an acquisition unit 702, a measurement unit 703, and a processing unit 704, wherein:

The storage unit 701 is configured to store the multiple frequency point information measured under the first network as the first frequency point set information when accessing the first network that does not support voice services;

The obtaining unit 702 is configured to fall back to a second network that supports voice services based on CSFB when a voice service needs to be initiated, and obtain change information representing a change in the terminal location in the second network;

The measuring unit 703 is configured to measure the frequency point in the first network received by the terminal when the terminal is in the second network when the change information satisfies the set condition, and based on the result obtained from the measurement updating the information of the first frequency point set;

The processing unit 704 is configured to FR to the first network based on the latest stored first frequency point set information when the voice service ends.

Optionally, the change information includes:

Information about cell handover of the terminal; and/or

The signal change difference of the serving cell where the terminal is located within the set time period.

Optionally, when the change information satisfies the set condition, the measuring unit 703 measures the frequency points in the first network received by the terminal when the terminal is in the second network, and based on the measured As a result, when updating the information of the first frequency point set, it is specifically used for:

When a cell handover occurs or the signal change difference of the serving cell within the set duration exceeds a preset threshold, the frequency point in the first network received by the terminal when the terminal is in the second network The measurement is performed, and the multiple frequency point information obtained by the measurement is used as the second frequency point set information.

updating the stored first frequency point information to the second frequency point information.

Optionally, when the voice service ends, the processing unit 704 is specifically configured to:

When the voice service ends, frequency points that meet the preset conditions are determined in the latest stored information of the first frequency point set, and fast FR fallback to the first network is attempted based on the determined frequency points.

Optionally, the signal change difference is a signal quality change difference or a signal level change difference.

The device 700 mentioned above in this embodiment of the present invention can be an independent component, or it can be integrated into other components. components within the terminal.

It should be noted that, for the function realization and interaction mode of each unit of the apparatus 700 in the embodiment of the present invention, further reference may be made to the description of related method embodiments, and details are not repeated here.

In addition, each of the above "units" may be implemented through an application-specific integrated circuit (ASIC), a processor and memory for executing one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the above functions device to achieve.

Based on the same inventive concept, referring to FIG. 8, an embodiment of the present invention provides a terminal 800. FIG. 8 is a schematic structural diagram of a terminal 800 provided by an embodiment of the present invention. As shown in FIG. and a memory 802 , the program codes for implementing the solutions of the present invention are stored in the memory 802 and executed under the control of the processor 801 .

The program stored in the memory 802 is used to instruct the processor 801 to perform the method of quickly falling back to the network, including: when the terminal accesses the first network that does not support the voice service, the multiple frequency measured under the first network The point information is stored in the memory 802 as the first frequency point set information; when the terminal needs to initiate a voice service, it falls back to the second network supporting the voice service based on the CSFB method, and acquires the information used in the second network in the second network. Change information characterizing the change of the terminal location; when the change information satisfies a set condition, when the terminal is in the second network, measure the frequency points in the first network received by the terminal, and based on The result of the measurement is used to update the first frequency point set information; when the voice service ends, FR to the first network based on the latest stored first frequency point set information.

Optionally, the change information includes:

Information about cell handover of the terminal; and/or

The signal change difference of the serving cell where the terminal is located within the set time period.

Optionally, the processor is specifically used for:

When a cell handover occurs or the signal change difference of the serving cell within the set duration exceeds a preset threshold, the frequency point in the first network received by the terminal when the terminal is in the second network Perform measurement, and use the measured frequency point information as the second frequency point set information

updating the stored first frequency point information to the second frequency point information.

Optionally, the processor is specifically used for:

When the voice service ends, frequency points that meet the preset conditions are determined in the latest stored information of the first frequency point set, and FR to the first network is attempted based on the determined frequency points.

It can be understood that the terminal 800 in this embodiment can be used to implement all the functions related to the terminal in Figure 5 of the above method embodiment, and its specific implementation process can refer to the relevant description of the terminal execution method in the above method embodiment, and will not be repeated here. .

It can be understood that the processor 801 involved in the terminal 800 in the embodiment of the present invention may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit, or one or more programs used to control the solution of the present invention implementation of the integrated circuit. One or more memories included in a computer system, which may be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (random access memory, RAM) Or other types of dynamic storage devices that can store information and instructions, or disk storage. These memories are connected to the processor via a bus.

Memory 802, such as RAM, holds an operating system and programs for executing the solutions of the present invention. An operating system is a program that controls the operation of other programs and manages system resources.

These memories 802 may be connected to the processor 801 through a bus, or may be connected to the processor 801 respectively through dedicated connection lines.

By designing and programming the processor 801, the code corresponding to the method shown in FIG. 5 of the embodiment of the present invention is solidified into the chip, so that the chip can execute the method shown in FIG. 5 during operation. How to design and program the processor 801 is well known to those skilled in the art and will not be repeated here.

To sum up, in the embodiment of the present invention, when the terminal accesses the first network that does not support voice services, it stores the multiple frequency point information measured under the first network as the first frequency point set information; When the voice service is initiated, fall back to the second network that supports the voice service, and obtain change information representing the change of the terminal location in the second network; when the change information meets the set condition, the received The frequency points in the first network are measured, and the first frequency point set information is updated; when the voice service ends, based on the latest stored first frequency point set information, FR to the first network, so that the release of the voice service area can be avoided The frequency point to which it belongs is not included in the frequency point memorized by the original terminal, which leads to the failure of FR, and improves the performance of independent FR.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Apparently, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if the modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (11)

1. A method for quickly falling back to the network, characterized in that, comprising: When the terminal accesses the first network that does not support the voice service, save the multiple frequency point information measured under the first network as the first frequency point set information; When the terminal needs to initiate a voice service, it falls back to a second network that supports voice services based on a circuit domain fallback CSFB method, and obtains change information representing a change in the location of the terminal in the second network; When the change information satisfies the set condition, the terminal measures the frequency point in the first network received by the terminal when the terminal is in the second network, and based on the measurement result, the The first frequency point set information is updated; When the voice service ends, the terminal quickly falls back to FR to the first network based on the latest saved first frequency point set information. 2. The method according to claim 1, wherein the change information comprises: Information about cell handover of the terminal; and/or The signal change difference of the serving cell where the terminal is located within the set time period. 3. The method according to claim 2, wherein when the change information satisfies the set condition, when the terminal is in the second network, when the terminal is in the second network, the frequency in the first network received by the terminal is Points are measured, and the information of the first frequency point set is updated based on the results obtained from the measurement, including: When the terminal is in the second network when the cell switching occurs or the signal change difference of the serving cell where the terminal is located exceeds the preset threshold within the set time period, the terminal receives the information in the first network when the terminal is in the second network. The frequency point is measured, and the multiple frequency point information obtained by the measurement is used as the second frequency point set information The terminal updates the stored first frequency point information to the second frequency point information. 4. The method according to claim 1, wherein when the voice service ends, the terminal sends to the first network based on the latest stored first frequency point set information FR, including: When the voice service ends, the terminal determines frequency points that meet preset conditions in the latest saved information of the first frequency point set, and tries to FR to the first network based on the determined frequency points. 5. The method according to claim 3, wherein the signal change difference is a signal quality change difference or a signal level change difference. 6. A device for quickly falling back to the network, characterized in that it is applied to a terminal, including: A storage unit, configured to store a plurality of frequency point information measured under the first network as first frequency point set information when accessing a first network that does not support voice services; An acquiring unit, configured to fall back to a second network supporting voice services based on circuit domain fallback (CSFB) when a voice service needs to be initiated, and acquire change information representing a change in the location of the terminal in the second network ; a measuring unit, configured to measure the frequency points in the first network received by the terminal when the terminal is in the second network when the change information satisfies a set condition, and measure the frequency points in the first network based on the measurement results The information of the first frequency point set is updated; The processing unit is configured to quickly fall back FR to the first network based on the latest stored first frequency point set information when the voice service ends. 7. The device according to claim 6, wherein the change information comprises: Information about cell handover of the terminal; and/or The signal change difference of the serving cell where the terminal is located within the set time period. 8. The device according to claim 7, characterized in that, when the change information satisfies the set condition, the measuring unit measures the information in the first network received by the terminal when the terminal is in the second network When the frequency point is measured, and the information of the first frequency point set is updated based on the result obtained from the measurement, it is specifically used for: When a cell handover occurs or the signal change difference of the serving cell within the set duration exceeds a preset threshold, the frequency point in the first network received by the terminal when the terminal is in the second network Perform measurement, and use the measured frequency point information as the second frequency point set information updating the stored first frequency point information to the second frequency point information. 9. The device according to claim 6, wherein when the voice service ends, the processing unit is specifically configured to: When the voice service ends, frequency points that meet the preset conditions are determined in the latest stored information of the first frequency point set, and FR to the first network is attempted based on the determined frequency points. 10. The apparatus according to claim 8, wherein the signal change difference is a signal quality change difference or a signal level change difference. 11. A terminal, characterized in that, comprising a memory in which program instructions are stored; at least one processor for executing said program instructions; The program instructions include: When accessing the first network that does not support the voice service, saving the multiple frequency point information measured under the first network as the first frequency point set information; When it is necessary to initiate a voice service, fall back to a second network that supports voice services based on a circuit domain fallback CSFB method, and acquire change information used to represent a change in the terminal location in the second network; When the change information satisfies the set condition, measure the frequency point in the first network received by the terminal when the terminal is in the second network, and measure the first frequency point based on the measurement result The point set information is updated; When the voice service ends, the FR is quickly dropped back to the first network based on the latest stored information of the first frequency point set.