WO2019061479A1

WO2019061479A1 - Csfb result detection method and device, and computer storage medium

Info

Publication number: WO2019061479A1
Application number: PCT/CN2017/104943
Authority: WO
Inventors: 曾元清
Original assignee: 深圳市云中飞网络科技有限公司
Priority date: 2017-09-30
Filing date: 2017-09-30
Publication date: 2019-04-04
Also published as: CN108064460B; CN108064460A; CN108064460A8

Abstract

Disclosed in the present invention are a circuit switched fallback (CSFB) result detection method and device, and a computer storage medium. The method comprises: in a process of performing CSFB on the basis of indication information indicating that a terminal uses a preset CSFB prioritization scheme for voice service, detecting the voice call state of the terminal in a neighboring cell of a designated global system for mobile communications (GSM) cell, the voice call of the terminal in the neighboring cell being triggered when the frequency sweep on the designated GSM cell is successful on the basis of designated GSM cell frequency point information and the designated cell is invalid, the frequency point information being carried in a redirection command sent by an LTE base station; and determining whether the CSFB succeeds or not by utilizing the detected voice call state, wherein the first indication information is carried by an attach accept message sent by the LTE base station to the terminal, the attach accept message is sent by the LTE base station after the terminal sends an attach request message to the LTE base station, and the CSFB process is triggered when the terminal receives a paging message from the LTE base station.

Description

Method and device for detecting falling result of CSFB, computer storage medium

Technical field

The present invention relates to the field of CSFB (Circuit Switched Fallback), and in particular, to a CSFB fallback result detecting method and apparatus, and a computer storage medium.

Background technique

Since long-term evolution (LTE, Long Term Evolution) and 2G/3G dual-mode terminals are wireless-signal-mode, a dual-mode or multi-mode terminal with LTE and 2G/3G access capabilities, When using LTE access, 2G/3G circuit domain service signals cannot be transmitted. In order to enable the terminal (UE, User Equipment) to perform a CS (Circuit Switched) service, such as voice, and the UE can perform the packet domain (PS, Packet Switch) under the LTE access of the UE. The business is processed correctly, resulting in CSFB technology.

In the CSFB process, the originator of the telephone is called the caller (MO, Mobile Origination), the receiver of the call is called the called (MT, Mobile Termination), and the MO and the MT each have their own CSFB signaling flow. For the MT in the CSFB process, the occurrence of various abnormal conditions will probabilistically cause the CSFB process to fail, which may result in the call being unable to be connected. How to effectively detect the CSFB fallback result in an abnormal scenario is particularly necessary.

Summary of the invention

To solve the above technical problem, an embodiment of the present invention provides a CSFB fallback result detecting method and apparatus, and a computer storage medium.

An embodiment of the present invention provides a method for detecting a fallback result of a CSFB, including:

Instructing information based on the instruction that the terminal uses the preset CSFB optimization scheme for voice service During the execution of the CSFB, detecting the voice call state of the neighboring cell of the terminal in the cell of the Global System for Mobile Communication (GSM); the voice call of the terminal in the neighboring cell of the designated GSM cell is based on the designated The GSM cell frequency point information is triggered when the specified GSM cell is successfully swept and the designated cell is invalid; the specified GSM cell frequency point information is carried in a redirection command sent by the LTE base station;

Using the detected voice call state, determining whether the CSFB is successfully dropped;

The indication information is carried in an attach accept message sent by the LTE base station to the terminal; the attach accept message is sent by the LTE base station after the terminal sends an attach request message to the LTE base station;

The CSFB process is triggered when the terminal receives the paging message sent by the LTE base station.

In the foregoing solution, the determining, by using the detected voice call state, whether the CSFB is successfully dropped, includes:

When it is detected that the terminal does not initiate an access request to the neighboring cell, it is determined that the CSFB fallback fails.

In the foregoing solution, when it is detected that the terminal does not send an access request to the neighboring cell within a preset time period, it is determined that the CSFB fallback fails.

When it is detected that the access request cause value carried in the access request sent by the terminal to the neighboring cell is not a preset value, determining that the CSFB fallback fails.

After the terminal accesses the neighboring cell, when it is detected that the voice call is not successfully established, it is determined that the CSFB fallback fails.

In the above solution, the detecting, by the terminal, the voice call state of the neighboring cell of the designated GSM cell includes:

Detecting a voice call state of the terminal in the neighboring cell in an emulated network environment.

An embodiment of the present invention further provides a CSFB fallback result detecting apparatus, including:

The detecting unit is configured to detect a voice call state of the neighboring cell of the designated GSM cell in the process of performing CSFB according to the indication information indicating that the terminal performs the voice service by using the preset CSFB optimization scheme; the terminal is in the designated GSM cell The voice call of the neighboring cell is triggered when the specified GSM cell frequency sweep is successful and the designated cell is invalid according to the specified GSM cell frequency point information; the frequency information of the designated GSM cell is carried in the long term evolution LTE. The redirect command sent by the base station;

a determining unit configured to determine whether the CSFB is successfully dropped by using the detected voice call state;

In the above solution, the determining unit is configured to:

After the terminal accesses the neighboring cell, when it is detected that the voice call is not successfully established, the terminal determines The CSFB failed to fall back.

In the above solution, the detecting unit is configured to:

The embodiment of the present invention further provides a CSFB fallback result detecting apparatus, including: a processor and a memory configured to store a computer program capable of running on the processor,

Wherein the processor is configured to perform the steps of any of the above methods when the computer program is run.

Embodiments of the present invention also provide a computer storage medium having stored thereon a computer program that, when executed by a processor, implements the steps of any of the above methods.

The technical solution provided by the embodiment of the present invention detects a voice call state of the neighboring cell of the terminal in the designated cell in the process of performing the CSFB according to the indication information indicating that the terminal uses the preset CSFB optimization scheme to perform the voice service; the terminal is in the The voice call of the neighboring cell of the designated GSM cell is triggered when the specified GSM cell frequency sweep is successfully performed and the specified cell is invalid according to the specified GSM cell frequency point information; the specified GSM cell frequency point information is carried in the LTE The redirecting command sent by the base station is used to determine whether the CSFB is successfully dropped by using the detected voice call state; wherein the indication information is carried in an attach accept message sent by the LTE base station to the terminal; The message is sent by the LTE base station after the terminal sends an attach request message to the LTE base station; the CSFB process is triggered when the terminal receives the paging message sent by the LTE base station, and is provided by using the embodiment of the present invention. The solution can configure the frequency point information of the wrong GSM cell on the network side so that the terminal recognizes that the designated GSM cell is invalid. The voice call state of the neighboring cell in the designated GSM cell during the CSFB process is detected, thereby finally determining the fallback result of the CSFB, so that in the subsequent CSFB process, the optimization scheme can be further improved to improve the probability of success of the CSFB process, Improve the user's calling experience.

DRAWINGS

FIG. 1 is a flowchart of channel acquisition according to an embodiment of the present invention;

2 is a schematic flowchart of a method for detecting a fallback result of a CSFB according to an embodiment of the present invention;

3 is a schematic flowchart of a method for detecting a fallback result of a CSFB according to an embodiment of the present invention;

4 is a schematic diagram 1 of an emulation code according to an embodiment of the present invention;

FIG. 5 is a second schematic diagram of a simulation code according to an embodiment of the present invention; FIG.

6 is a schematic structural diagram of a CSFB fallback result detecting apparatus according to an embodiment of the present invention;

FIG. 7 is a schematic diagram showing the hardware structure of a CSFB fallback result detecting apparatus according to an embodiment of the present invention.

Detailed ways

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

Under normal circumstances, the CSFB-enabled terminal can search for the LTE network, complete the LTE/2G network joint registration, and be able to voice call and call.

The CSFB process includes three phases: 1) the UE initiates a call (corresponding to MO) on the LTE network, or receives a page (corresponding to the MT); 2) the UE falls back under the guidance of the LTE network and searches for a suitable GSM cell for access; 3) The UE reads the GSM cell system broadcast message and establishes a voice call.

In addition, a more important process in the CSFB process is the channel acquisition process. The channel acquisition process is described below.

FIG. 1 is a flowchart of channel acquisition according to an embodiment of the present invention. As shown in FIG. 1 , the channel acquisition process includes the following steps:

Step 101: The UE is powered on, and performs an Evolved Packet System (EPS)/International Mobile Subscriber Identification Number (IMSI) attachment.

Step 102: The UE receives the CS paging message and starts executing the CSFB process.

Step 103: The UE receives the redirection command sent by the network side, where the redirection command carries the frequency information of the GMS cell.

Here, the redirection command is implemented by LTE_RRCConnectionRelease signaling.

Step 104: The UE scans the frequency of the GSM cell based on the frequency information of the GMS cell carried in the redirection command, and selects a frequency point of the GSM cell for communication.

Here, the frequency point of the selected GSM cell is referred to as a target frequency point.

Step 105: The UE sends a channel request message (CHANNEL_REQUEST), that is, an access request message, to the network based on the target frequency point.

Here, after the terminal sends the CHANNEL_REQUEST for the first time, the T3120 timer is started to count the number of retransmissions of CHANNEL_REQUEST by the random access procedure, and the maximum number of retransmissions is preset. When the timer T3120 expires and reaches the "maximum number of retransmissions", the terminal will start the T3126 timer to time the terminal to silently not send CHANNEL_REQUEST; if the T3126 timer expires (the time is reached), the network still has no If the channel request of the terminal is answered, the terminal abandons the request attempt.

Step 106: The UE receives the IM message replied by the network, and obtains the channel allocated by the network by using the IM message.

With the continuous expansion of the LTE base station and the retreat and re-farming of some old GSM/TDSCDMA base stations, the configuration of the original network deployed on the base station signaling side is not updated in real time, and the configuration that the network sends to the UE occurs. The information is inconsistent with the actual deployment, which leads to various abnormalities in the inter-system (InterRAT) voice call of CSFB, such as failure to connect, repeated connection failure, and the like.

In order to solve the call problem caused by such network deployment incompatibility, various terminal manufacturers have adopted various optimization methods to improve the call experience. To verify the rationality of the CSFB optimization scheme, it is necessary to perform the CSFB process in the abnormal scenario. Detecting in order to improve the CSFB optimization side in a targeted manner case.

The CSFB fallback scheme adopts the 3GPP R8 redirection fallback scheme. During the CSFB deployment process, the problem of parameter configuration will probabilistically cause the CSFB process to be abnormal. To this end, the embodiment of the present invention provides a method for detecting a CSFB fallback result in a scenario where multiple erroneous GSM cell information is sent by the network side.

In various embodiments of the present invention, in a process of performing CSFB based on indication information indicating that the terminal performs voice service by using a preset CSFB optimization scheme, detecting a voice call state of the neighboring cell of the terminal in the designated cell; The voice call of the neighboring cell of the designated GSM cell is triggered when the specified GSM cell frequency sweep is successfully performed and the designated cell is invalid according to the specified GSM cell frequency point information; the specified GSM cell frequency information is carried in In the redirection command sent by the LTE base station, determining whether the CSFB is successfully dropped by using the detected voice call state; wherein the indication information is carried in an attach accept message sent by the LTE base station to the terminal; The receiving message is sent by the LTE base station after the terminal sends an attach request message to the LTE base station; and the CSFB process is triggered when the terminal receives the paging message sent by the LTE base station.

The solution provided by the embodiment of the present invention can detect the voice call state of the neighboring cell of the designated GSM cell in the CSFB process in the scenario where the terminal identifies the frequency of the GSM cell in the scenario that the terminal identifies the GSM cell is invalid, and finally determines the scenario. The CSFB fallback result, in this way, in the subsequent CSFB process, the optimization scheme can be further improved to improve the probability of the CSFB process success, so as to improve the user's calling experience.

2 is a schematic flowchart of a CSFB fallback result detecting method according to an embodiment of the present invention. As shown in FIG. 2, the CSFB fallback result detecting method includes the following steps:

Step 201: In the process of performing CSFB according to the indication information indicating that the terminal performs the voice service by using the preset CSFB optimization scheme, detecting a voice call state of the neighboring cell of the terminal in the designated cell;

Here, the terminal triggers when the voice call of the neighboring cell of the designated GSM cell is based on the specified GSM cell frequency point information, and the specified GSM cell is successfully swept and the designated cell is invalid; the designated GSM cell The frequency point information is carried in a redirect command sent by the LTE base station.

The indication information is carried in an attach accept message sent by the LTE base station to the terminal; the attach accept message is sent by the LTE base station after the terminal sends an attach request message to the LTE base station; the CSFB The process is triggered when the terminal receives the paging message sent by the LTE base station.

In a practical application, a network environment applied to the embodiment of the present invention may be constructed by means of a laboratory simulation. That is, the scenario in which the terminal is located in the embodiment of the present invention is obtained through simulation, and the processing is performed on the one hand. The staff does not need to go to the site for testing, so that the personnel cost can be reduced. On the other hand, the scene in the scene may also contain other factors, thereby affecting the detection result. Therefore, the simulation network of the embodiment of the present invention can stably reproduce the scene. The CSFB anomaly scenario that occurs in the network can eliminate the influence of other factors on the detection result in the scenario described in the embodiment of the present invention.

Based on this, in some embodiments, the voice call state of the terminal in the neighboring cell in the simulated network environment is detected.

Step 202: Determine whether the CSFB is successfully dropped by using the detected voice call state.

Specifically, when it is detected that the terminal does not initiate an access request to the neighboring cell, it is determined that the CSFB fallback fails.

When the terminal initiates an access request to the neighboring cell, when it is detected that the access request cause value carried in the access request sent by the terminal to the neighboring cell is not a preset value, determining that the CSFB fails to fall back .

Here, the access request cause value carried in the access request sent by the terminal to the neighboring cell is a preset value, and after the terminal accesses the neighboring cell, when it is detected that the voice call is not successfully established, At the time, it is determined that the CSFB falls back.

Certainly, when it is detected that the terminal successfully establishes a voice call with the neighboring cell, it is determined that the CSFB is successfully dropped.

In the actual application, in order to prevent the detection time process, when it is detected that the terminal does not send an access request to the neighboring cell within a preset time period, it is determined that the CSFB fallback fails.

Here, the preset duration can be set as needed. In addition, the timer can be detected by setting a timer. Specifically, the timer is set. When it is detected that the terminal does not send an access request to the neighboring cell before the timer expires, it is determined that the CSFB fallback fails.

The method provided by the embodiment of the present invention detects a voice call state of a neighboring cell of the terminal in a specified cell in a process of performing CSFB according to the indication information indicating that the terminal uses the preset CSFB optimization scheme to perform voice service; The voice call of the neighboring cell of the GSM cell is triggered when the specified GSM cell frequency sweep is successfully performed and the specified cell is invalid according to the specified GSM cell frequency point information; the specified GSM cell frequency point information is carried in the LTE base station. In the redirected command sent, determining whether the CSFB is successfully dropped by using the detected voice call state; wherein the indication information is carried in an attach accept message sent by the LTE base station to the terminal; the attach accept message The LTE base station sends the LTE base station after the terminal sends an attach request message to the LTE base station; the CSFB process is triggered when the terminal receives the paging message sent by the LTE base station, and is provided by using the embodiment of the present invention. The solution can configure the frequency information of the wrong GSM cell on the network side to enable the terminal to identify the scenario in which the designated GSM cell is invalid. The voice call state of the neighboring cell in the GSM cell is determined during the CSFB process, and finally the CSFB fallback result is finally determined. Thus, in the subsequent CSFB process, the optimization scheme can be further improved to improve the probability of the CSFB process success, so as to improve The user's calling experience.

In addition, detecting the voice call state of the terminal in the neighboring cell in the simulated network environment, the simulation method does not require a staff to go to the site, and other factors affecting the detection can be removed, thereby greatly reducing the personnel cost. At the same time, it is possible to eliminate the embodiment of the present invention. The effect of other factors on the test results in the described scenario.

The present invention will be further described in detail below with reference to an application embodiment.

In this application embodiment, a network environment is constructed by using a simulation platform, including a time division duplex (TDD)-LTE cell, a TDSCDMA cell, and a GSM cell. Among them, GSM neighboring cell information is configured in the LTE SIB, and LTE neighboring is configured in the GSM SI. District cell information.

The abnormal scenario of the application embodiment is: the network side misconfigures multiple GSM cell frequency point information, and the UE can access the correct cell according to the previous neighbor information after the access attempt fails, thereby verifying the validity of the UE side call optimization scheme. And reasonableness.

The detection method of the fallback result of the CSFB of this application embodiment, as shown in FIG. 3, includes the following steps:

Step 300: The UE is registered on the LTE cell to perform an attach procedure.

Specifically, the UE is an MT, and after the UE is powered on, the joint EPS/IMSI attach procedure is first performed.

The method includes: triggering the UE to send an attach request message (Attach Request) to the LTE base station, and receiving an attach accept message sent by the LTE base station, where the attach accept message is carried to indicate the terminal The preset CSFB optimization scheme is used to indicate the voice service. 4 is a schematic diagram 1 of an emulation code according to an embodiment of the present invention, in which: IMS voice over PS(V)=Not supported(0), representing the indication information.

Step 301: The network side triggers the MT CSFB process, and the network side sends a paging message (Paging) to the UE to start the CSFB process.

Here, in actual application, the MO needs to initiate a call for the MT first, and then the MT receives the paging message sent by the network side.

Specifically, after receiving the initial address request (IAM) incoming message, the mobile services switching center (MSC) in the network sends the SGsAP-PAGING-REQUEST message according to the existing SGs association and Mobility Management Entity (MME) information. To the MME, here, the SGsAP-PAGING-REQUEST message carries the following information: IMSI, temporary mobility TMSI (Temporary Mobile Subscriber Identity), service indicator (Service indicator), calling number, location area information.

After receiving the message, the MME sends a paging message to the base station, and the base station initiates an air interface Paging process. The UE establishes a connection and sends an Extended Service Request message to the MME. The MME sends an SGsAP-SERVICE-REQUEST message to the MSC. The MSC receives the message and does not resend the paging request message to the MME. To avoid the call waiting time being too long during the call connection process, the MSC receives the SGs Service Request message containing the idle state indication, first notifying that the calling call is in the process of being connected. The MME sends an Initial UE Context Setup message to the base station. Here, the Initial UE Context Setup message carries a CS Fallback Indicator, and the CS Fallback Indicator is used to indicate that the base station UE needs to fall back to the UMTS Terrestrial Radio Access Network due to the CSFB service requirement (UTRAN, UMTS Terrestrial Radio Access Network). ) / GSM / EDGE Radio Access Network (GERAN, GSM EDGE Radio Access Network).

In the attaching process, the UE receives the LTE_RRCConnectionRelease signaling sent by the LTE base station, that is, the redirect command. The redirection command carries frequency information of multiple erroneous GSM cells. As shown in FIG. 5, the base station sends an R8 redirection command (rrcConnectionRelease_R8(0)) to the UE, but the command carries the frequency information of multiple erroneous GSM cells, which does not match the neighboring cell GSM cell. Direct the terminal to fall back to the target GSM cell.

Step 302: The UE identifies that the target GSM cell is an invalid cell.

Here, the UE may identify that the target GSM cell is an invalid cell by failing multiple access attempts. Specifically, a timer may be set, and the target GSM cell is attempted multiple times before the timer expires. When the target GSM cell is not accessed after the timer expires, the UE identifies that the target GSM cell is an invalid cell.

Step 303: Detect whether the UE initiates an access request message (ie, the channel request message in step 105) in the neighboring GSM cell within the specified timer duration. If yes, step 304 is performed. Otherwise, the CSFB fallback fails. That is to say, the default CSFB optimization scheme fails;

Here, after the UE identifies that the target GSM cell is an invalid cell, it first initiates a power scanning process, finds a neighboring cell GSM cell, and then generates an access request message to the neighboring cell GSM cell.

Step 304: Detect whether the access request cause value carried in the access request is a preset value (that is, a correct access request cause value). If yes, execute step 305. Otherwise, the CSFB fallback fails, that is, The default CSFB optimization scheme fails;

Here, in actual application, it is necessary to parse the access request cause value (cause) from the access request, and then check whether the carried access request cause value is a preset value.

Step 305: Continue the CSFB subsequent process, and check whether the UE successfully establishes a CS voice call with the neighboring cell GSM cell in the subsequent process. If yes, the CSFB fallback success indicates that the preset CSFB optimization scheme is successful. Otherwise, the CSFB fallback fails. In other words, the default CSFB optimization scheme fails.

In order to implement the method of the embodiment of the present invention, the embodiment of the present invention further provides a CSFB fallback result detecting device. As shown in FIG. 6, the device includes:

The detecting unit 61 is configured to detect a voice call state of the neighboring cell of the designated GSM cell in the process of performing CSFB according to the indication information indicating that the terminal performs the voice service by using the preset CSFB optimization scheme; the terminal is in the designated GSM The voice call of the neighboring cell of the cell is triggered when the specified GSM cell frequency sweep is successful and the designated cell is invalid according to the specified GSM cell frequency point information; the frequency information of the designated GSM cell is carried in the long term evolution In the redirect command sent by the LTE base station;

The determining unit 62 is configured to determine whether the CSFB is successfully dropped by using the detected voice call state;

In some embodiments, the determining unit 62 is configured to:

In some embodiments, when it is detected that the terminal does not send an access request to the neighboring cell within a preset time period, the determining unit 62 determines that the CSFB fallback fails.

In some embodiments, the determining unit 62 is configured to:

In some embodiments, the detecting unit 61 is configured to:

In practical applications, the detecting unit 61 and the determining unit 62 may be implemented by a processor in the fallback result detecting device of the CSFB.

It should be noted that the CSFB fallback result detecting apparatus provided in the above embodiment is only illustrated by the division of each of the foregoing program modules when performing the CSFB fallback result detection. In actual applications, the above processing may be allocated as needed. Different program modules are completed, that is, the internal structure of the device is divided into different program modules to complete all or part of the processing described above. In addition, the CSFB fallback result detecting device provided by the foregoing embodiment is the same as the CSFB fallback result detecting method embodiment. The specific implementation process is described in detail in the method embodiment, and details are not described herein again.

The hardware implementation of each unit in the fallback result detecting device of the above CSFB, in order to implement the method provided by the embodiment of the present invention, the embodiment of the present invention further provides a CSFB fallback result detecting device, as shown in FIG. 70 includes a processor 71 and a memory 72 configured to store a computer program executable on the processor,

The processor 71 is configured to execute when the computer program is executed:

In the process of performing CSFB according to the indication information indicating that the terminal performs the voice service by using the preset CSFB optimization scheme, detecting the voice call state of the neighboring cell of the terminal in the designated GSM cell; the voice of the terminal in the neighboring cell of the designated GSM cell The call is triggered when the specified GSM cell frequency sweep is successful and the designated cell is invalid according to the specified GSM cell frequency point information; the frequency information of the designated GSM cell carries the redirection sent by the LTE base station In the command;

In some embodiments, the processor 71 is configured to execute when the computer program is executed:

When it is detected that the terminal does not send an access request to the neighboring cell within a preset time period, it is determined that the CSFB fallback fails.

The access request cause value carried in the access request sent by the terminal to the neighboring cell is detected. If it is not a preset value, it is determined that the CSFB falls back.

Of course, in actual application, as shown in FIG. 7, the various components of the device 70 are coupled together by a bus system 73. It will be appreciated that the bus system 73 is used to implement connection communication between these components. The bus system 73 includes a power bus, a control bus, and a status signal bus in addition to the data bus. However, for clarity of description, various buses are labeled as the bus system 73 in FIG.

In an exemplary embodiment, an embodiment of the present invention further provides a computer storage medium, which is a computer readable storage medium, such as a memory 72 including a computer program, which may be processed by a processor 71 of the CSFB fall result detection device 70. Executing to complete the steps described in the previous methods. The computer readable storage medium may be a magnetic random access memory (FRAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), and an erasable memory. Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Flash Memory, Magnetic Surface Memory, Optical Disc Or a memory such as a CD-ROM (Compact Disc Read-Only Memory).

The technical solutions described in the embodiments of the present invention can be arbitrarily combined without conflict.

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

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

In addition, each functional unit in each embodiment of the present invention may be integrated into one second processing unit, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention.

Industrial applicability

The solution provided by the embodiment of the present invention detects a voice call state of the neighboring cell of the terminal in the designated cell in the process of performing CSFB according to the indication information indicating that the terminal uses the preset CSFB optimization scheme to perform the voice service; the terminal is specified. The voice call of the neighboring cell of the GSM cell is triggered when the specified GSM cell frequency sweep is successfully performed and the specified cell is invalid according to the specified GSM cell frequency point information; the specified GSM cell frequency point information is carried in the LTE base station. In the redirected command sent, determining whether the CSFB is successfully dropped by using the detected voice call state; wherein the indication information is carried in the LTE base station to send to the terminal The acknowledgment message is sent by the LTE base station after the terminal sends an attach request message to the LTE base station; the CSFB process is triggered when the terminal receives the paging message sent by the LTE base station The method provided by the embodiment of the present invention can detect the voice call state of the neighboring cell in the designated GSM cell in the CSFB process in the scenario where the terminal identifies the frequency information of the GSM cell in the scenario that the terminal identifies that the designated GSM cell is invalid. Therefore, the CSFB fallback result is finally determined, so that in the subsequent CSFB process, the optimization scheme can be further improved to improve the probability of the CSFB process success, so as to improve the user's calling experience.

Claims

A method for detecting a fallback result of a circuit domain fallback CSFB, the method comprising:

In a process of performing CSFB based on indication information indicating that the terminal performs voice service by using a preset CSFB optimization scheme, detecting a voice call state of the neighboring cell of the GSM cell of the global mobile communication system; the terminal is in a designated GSM cell. The voice call of the neighboring cell is triggered when the frequency of the specified GSM cell is successfully swept and the specified cell is invalid, and the specified GSM cell frequency information is carried in the LTE base station. In the redirect command;

Using the detected voice call state, determining whether the CSFB is successfully dropped;

The indication information is carried in an attach accept message sent by the LTE base station to the terminal; the attach accept message is sent by the LTE base station after the terminal sends an attach request message to the LTE base station;

The CSFB process is triggered when the terminal receives the paging message sent by the LTE base station.
The method according to claim 1, wherein the determining whether the CSFB is successfully dropped by using the detected voice call state comprises:

When it is detected that the terminal does not initiate an access request to the neighboring cell, it is determined that the CSFB fallback fails.
The method according to claim 2, wherein when it is detected that the terminal does not send an access request to the neighboring cell within a preset time period, it is determined that the CSFB fallback fails.
The method according to claim 1, wherein the determining whether the CSFB is successfully dropped by using the detected voice call state comprises:

When it is detected that the access request cause value carried in the access request sent by the terminal to the neighboring cell is not a preset value, determining that the CSFB fallback fails.
The method of claim 1, wherein said utilizing the detected voice call State, determine whether the CSFB falls back successfully, including:

After the terminal accesses the neighboring cell, when it is detected that the voice call is not successfully established, it is determined that the CSFB fallback fails.
The method according to claim 1, wherein the detecting the voice call state of the neighboring cell of the terminal in the designated GSM cell comprises:

Detecting a voice call state of the terminal in the neighboring cell in an emulated network environment.
A CSFB fallback result detecting device, the device comprising:

The detecting unit is configured to detect a voice call state of the neighboring cell of the designated GSM cell in the process of performing CSFB according to the indication information indicating that the terminal performs the voice service by using the preset CSFB optimization scheme; the terminal is in the designated GSM cell The voice call of the neighboring cell is triggered when the specified GSM cell frequency sweep is successful and the designated cell is invalid according to the specified GSM cell frequency point information; the frequency information of the designated GSM cell is carried in the long term evolution LTE. The redirect command sent by the base station;

a determining unit configured to determine whether the CSFB is successfully dropped by using the detected voice call state;

The indication information is carried in an attach accept message sent by the LTE base station to the terminal; the attach accept message is sent by the LTE base station after the terminal sends an attach request message to the LTE base station;

The CSFB process is triggered when the terminal receives the paging message sent by the LTE base station.
The device according to claim 7, wherein the determining unit is configured to:

When it is detected that the terminal does not initiate an access request to the neighboring cell, it is determined that the CSFB fallback fails.
The apparatus according to claim 7, wherein the determining unit is configured to:

When it is detected that the access request cause value carried in the access request sent by the terminal to the neighboring cell is not a preset value, determining that the CSFB fallback fails.
The apparatus according to claim 7, wherein the determining unit is configured to:

After the terminal accesses the neighboring cell, when it is detected that the voice call is not successfully established, it is determined that the CSFB fallback fails.
The apparatus according to claim 7, wherein the detecting unit is configured to:

Detecting a voice call state of the terminal in the neighboring cell in an emulated network environment.
A CSFB fallback result detecting apparatus, the apparatus comprising: a processor and a memory configured to store a computer program executable on the processor,

Wherein the processor is configured to perform the steps of the method of any one of claims 1 to 6 when the computer program is run.
A computer storage medium having stored thereon a computer program, the computer program being executed by a processor to perform the steps of the method of any one of claims 1 to 6.