CN108124511B

CN108124511B - CSFB (Circuit switched Fall Back) result detection method and device and storage medium

Info

Publication number: CN108124511B
Application number: CN201780001893.3A
Authority: CN
Inventors: 曾元清
Original assignee: Shenzhen Huantai Technology Co Ltd
Current assignee: Shenzhen Huantai Technology Co Ltd
Priority date: 2017-09-30
Filing date: 2017-09-30
Publication date: 2020-12-22
Anticipated expiration: 2037-09-30
Also published as: CN108124511A; WO2019061433A1

Abstract

The invention discloses a CSFB (Circuit switched Fall Back) result detection method, a CSFB fall result detection device and a storage medium, wherein the CSFB result detection device comprises the following steps: in the CSFB execution process of indicating information for performing voice service by adopting a preset CSFB optimization scheme based on an indicating terminal, the terminal sends a request message for establishing voice call to a target WCDMA cell according to the frequency point information of the target WCDMA cell; when the voice call request message is responded and the voice call link is successfully established, detecting that the terminal receives a routing area update rejection message, and starting to detect the voice call state; when the voice call state is detected to be a disconnected state, determining that the fallback result of the CSFB is fallback failure; when the voice call state is detected to be the hold state, whether the terminal returns to the LTE network within the preset time length after the voice call in the WCDMA network is finished is determined so as to determine the fall back result of the CSFB.

Description

CSFB (Circuit switched Fall Back) result detection method and device and storage medium

Technical Field

The embodiment of the invention relates to the technical field of Circuit Switched Fallback (CSFB), in particular to a CSFB Fallback result detection method and device and a storage medium.

Background

Since wireless communication between a Long Term Evolution (LTE) terminal and a 2G/3G dual-mode terminal is a single-radio mode (Signal-radio mode), a dual-mode or multi-mode terminal with LTE and 2G/3G access capabilities cannot transmit 2G/3G circuit domain service signals when LTE access is used. In order to enable a terminal (UE) to perform Circuit domain (CS) services such as voice services under LTE access or camping, and to correctly handle Packet domain (PS) services being performed by the UE under LTE access, a CSFB technique has been developed.

In the CSFB procedure, an initiator of a phone call is called a calling party (MO), a receiver of the phone call is called a called party (MT), and the MO and the MT each have their own CSFB signaling flow. For the MT in the CSFB procedure, the occurrence of various abnormal situations will probabilistically cause the CSFB procedure to fail, and thus the call cannot be connected, and how to effectively detect the fall-back result of the CSFB in the abnormal scenario is particularly necessary.

Disclosure of Invention

In order to solve the foregoing technical problems, embodiments of the present invention desirably provide a method, an apparatus, and a storage medium for detecting a fallback result of a CSFB, so as to implement detection of the fallback result in a CSFB procedure, thereby determining a communication scheme, and improving a success rate of implementing the CSFB procedure.

The technical scheme of the embodiment of the invention can be realized as follows:

the embodiment of the invention provides a CSFB fallback result detection method, which comprises the following steps:

in the CSFB execution process of indicating information for voice service by adopting a preset CSFB optimization scheme based on an indicating terminal, the terminal sends a voice call establishment request message to a target WCDMA cell according to the frequency point information of the target WCDMA cell, wherein the frequency point information of the target WCDMA cell is carried in a redirection command sent by a Long Term Evolution (LTE) base station;

when the voice call request message is responded and a voice call link is successfully established, detecting that the terminal receives a routing area update rejection message, and starting to detect a voice call state;

when the voice call state is detected to be a disconnected state, determining that the fallback result of the CSFB is fallback failure;

and when the voice call state is detected to be a hold state, determining whether the terminal returns to the LTE network within a preset time length after the voice call in the WCDMA network is finished so as to determine a fallback result of the CSFB.

In this embodiment of the present invention, after determining whether the terminal returns to the LTE network within a preset time after the voice call in the WCDMA network is ended, the method further includes:

and when the voice call under the WCDMA network is finished and the terminal returns to the LTE network within the preset time length, determining that the fallback result of the CSFB is the successful fallback.

and when the voice call under the WCDMA network is finished, the terminal does not return to the LTE network within the preset time length, and when the terminal detects that the routing area updating request message is continuously sent to the WCDMA network, determining that the fallback result of the CSFB is fallback failure.

In this embodiment of the present invention, after the terminal receives the routing area update reject message, the method further includes:

and detecting that a routing area updating request message is continuously sent to the WCDMA network, and determining that the fallback result of the CSFB is fallback failure.

In this embodiment of the present invention, before the terminal sends a request message for establishing a voice call to a target WCDMA cell according to frequency point information of the target WCDMA cell in a CSFB execution process based on indication information indicating that the terminal performs a voice service by using a preset CSFB optimization scheme, the method further includes:

and triggering the terminal to send an attachment request message to the LTE base station, and receiving an attachment acceptance message sent by the LTE base station in response to the attachment request message, wherein the attachment acceptance message carries indication information for indicating the terminal to adopt the preset CSFB optimization scheme for voice service.

In the embodiment of the present invention, the detecting that the terminal receives the routing area update reject message and starts detecting the voice call state includes:

triggering the terminal to receive the routing area updating rejection message, and analyzing a rejection request reason value from the routing area updating rejection message;

and when the reason value of the request rejection is a preset value, starting to detect the voice call state.

The embodiment of the invention provides a CSFB fallback result detection device, which comprises:

the voice call unit is configured to send a voice call establishment request message to a target WCDMA cell according to frequency point information of the target WCDMA cell in a CSFB execution process of indicating information for performing voice service by adopting a preset CSFB optimization scheme based on an indicating terminal, wherein the frequency point information of the target WCDMA cell is carried in a redirection command sent by an LTE base station;

a detection unit configured to detect that the terminal receives a routing area update rejection message and start detecting a voice call state when a voice call link is successfully established in response to the voice call request message;

the determining unit is configured to determine that the fallback result of the CSFB is fallback failure when the voice call state is detected to be a disconnected state; and when the voice call state is detected to be the hold state, determining whether the terminal returns to the LTE network within a preset time length after the voice call in the WCDMA network is finished so as to determine a fallback result of the CSFB.

In an embodiment of the present invention, the apparatus further includes:

the determining unit is further configured to determine that the fallback result of the CSFB is successful when the terminal returns to the LTE network within the preset time after the voice call in the WCDMA network is ended and after the terminal returns to the LTE network within the preset time after the voice call in the WCDMA network is ended.

In an embodiment of the present invention, the apparatus further includes:

the determining unit is further configured to determine that the CSFB fallback result is fallback failure when determining that after the voice call in the WCDMA network is ended, after the terminal returns to the LTE network within a preset time period, and after the voice call in the WCDMA network is ended, the terminal does not return to the LTE network within the preset time period, and detects that a routing area update request message is continuously sent to the WCDMA network.

In an embodiment of the present invention, the apparatus further includes:

the determining unit is further configured to detect that the routing area update request message continues to be sent to the WCDMA network after the terminal receives the routing area update reject message, and determine that the fallback result of the CSFB is a fallback failure.

In an embodiment of the present invention, the apparatus further includes:

and the attachment unit is configured to, in the process of executing CSFB based on indication information indicating that a terminal performs voice service by using a preset CSFB optimization scheme, trigger the terminal to send an attachment request message to the LTE base station and receive an attachment acceptance message sent by the LTE base station in response to the attachment request message before the terminal sends a request message for establishing voice call to a target WCDMA cell according to frequency point information of the target WCDMA cell, wherein the attachment acceptance message carries indication information used for indicating that the terminal performs voice service by using the preset CSFB optimization scheme.

In an embodiment of the present invention, the apparatus further includes:

the analysis unit is configured to trigger the terminal to receive the routing area updating rejection message and analyze a rejection request reason value from the routing area updating rejection message;

the detection unit is specifically configured to start detecting the voice call state when the request rejection reason value is a preset value.

An embodiment of the present invention provides a computer storage medium, on which computer-executable instructions are stored, and when executed by a processor, the computer-executable instructions implement the method steps of the CSFB fallback result detection method.

The embodiment of the invention provides a CSFB fallback result detection method, a CSFB fallback result detection device and a storage medium.A terminal sends a voice call establishment request message to a target WCDMA cell according to WCDMA cell frequency point information in a CSFB execution process based on indication information of a voice service performed by an indication terminal by adopting a preset CSFB optimization scheme, wherein the target WCDMA cell frequency point information is carried in a redirection command sent by an LTE base station; when the voice call request message is responded and the voice call link is successfully established, detecting that the terminal receives a routing area update rejection message, and starting to detect the voice call state; when the voice call state is detected to be a disconnected state, determining that the fallback result of the CSFB is fallback failure; when the voice call state is detected to be the hold state, whether the terminal returns to the LTE network within the preset time length after the voice call in the WCDMA network is finished is determined so as to determine the fall back result of the CSFB. By adopting the technical scheme of the embodiment of the invention, the voice call state in the CSFB process can be detected under the scene that the 3G data service is not opened, so that the fallback result of the CSFB can be finally determined, the detection of the fallback result in the CSFB process is realized, and meanwhile, in the subsequent CSFB process, the success rate of the CSFB process can be further improved by perfecting the optimization scheme, so that the call experience of a user can be improved.

Drawings

Fig. 1 is a first flowchart of a method for detecting a fallback result of a CSFB according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a second method for detecting a fallback result of a CSFB according to an embodiment of the present invention;

fig. 3 is a schematic flowchart of a fall-back result detection method using CSFB according to an embodiment of the present invention;

FIG. 4 is a first diagram of an emulation code provided in an embodiment of the present invention;

FIG. 5 is a second schematic diagram of an emulation code provided in an embodiment of the present invention;

fig. 6 is a first schematic structural diagram of a fall-back result detection apparatus of a CSFB according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a fall-back result detection apparatus of a CSFB according to an embodiment of the present invention;

fig. 8 is a schematic diagram illustrating a hardware structure of a device for detecting a fallback result in a CSFB according to an embodiment of the present invention.

Detailed Description

So that the manner in which the features and aspects of the embodiments of the present invention can be understood in detail, a more particular description of the embodiments of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings.

Under normal conditions, the terminal with the CSFB function can search the LTE network when being started, complete the joint registration of the LTE/2G network and carry out voice calling and called.

The CSFB procedure comprises three phases: 1) the UE initiates a call (corresponding to MO) in the LTE network or receives a paging (corresponding to MT); 2) the UE falls back under the guidance of an LTE network and searches a proper GSM cell/WCDMA cell for access; 3) the UE reads the GSM cell/WCDMA cell system broadcast message and establishes a voice call.

With the continuous expansion of the LTE base station scale and the network quitting and re-cultivation of part of old GSM/WCDMA base stations, the configuration of the original network deployment on the base station signaling side is not updated in real time, and the configuration information issued by the network to the UE is inconsistent with the actual deployment situation, so that various abnormal situations, such as incapability of connection, failure of repeated connection, and the like, occur in the voice call across systems (inter rat) such as CSFB.

In order to solve the call problem caused by the incompatible situation of network deployment, various optimization means are adopted by terminal manufacturers to improve the call experience, and in order to verify the rationality of the CSFB optimization scheme, it is necessary to detect the CSFB process in an abnormal scene so as to improve the CSFB optimization scheme in a targeted manner.

The CSFB fallback scheme adopts a 3GPP R8 redirection fallback scheme, and during a CSFB deployment process, a CSFB procedure is probabilistically abnormal due to a problem of parameter configuration. Therefore, the embodiment of the present invention provides a method for detecting a CSFB fallback result in a scenario where a 3G data service is not opened, so that a terminal rejects a routing area update in a PS (Packet Switch) domain of a target WCDMA cell.

In various embodiments of the present invention, in the process of executing CSFB based on the indication information indicating that the indication terminal adopts the preset CSFB optimization scheme to perform voice service, the terminal sends a request message for establishing voice call to the target WCDMA cell according to the frequency point information of the target WCDMA cell, and the frequency point information of the target WCDMA cell is carried in a redirection command sent by the LTE base station; when the voice call request message is responded and the voice call link is successfully established, detecting that the terminal receives a routing area update rejection message, and starting to detect the voice call state; when the voice call state is detected to be a disconnected state, determining that the fallback result of the CSFB is fallback failure; when the voice call state is detected to be the hold state, whether the terminal returns to the LTE network within the preset time length after the voice call in the WCDMA network is finished is determined so as to determine the fall back result of the CSFB.

By adopting the technical scheme of the embodiment of the invention, the voice call state in the CSFB process can be detected under the scene that the 3G data service is not opened, so that the fallback result of the CSFB can be finally determined, the detection of the fallback result in the CSFB process is realized, and meanwhile, in the subsequent CSFB process, the success rate of the CSFB process can be further improved by perfecting the optimization scheme, so that the call experience of a user can be improved.

Fig. 1 is a schematic flow chart of a method for detecting a fallback result of a CSFB according to an embodiment of the present invention, and as shown in fig. 1, the method for detecting a fallback result of a CSFB includes the following steps:

s101, in the process of executing CSFB based on indication information of voice service performed by an indication terminal by adopting a preset CSFB optimization scheme, the terminal sends a request message for establishing voice call to a target WCDMA cell according to frequency point information of the target WCDMA cell, wherein the frequency point information of the target WCDMA cell is carried in a redirection command sent by an LTE base station;

it should be noted that, in the embodiment of the present invention, the CSFB fallback result detection apparatus may trigger the terminal to send an attach request message to the LTE base station and receive an attach accept message sent by the LTE base station in response to the attach request message, where the attach accept message carries indication information for indicating the terminal to perform a voice service using a preset CSFB optimization scheme.

Here, the voice call of the terminal in the WCDMA network is triggered when accessing the target WCDMA cell based on the frequency point information of the target WCDMA cell.

The indication information is carried in an attachment acceptance 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 the attach request message to the LTE base station. Specifically, when detecting that the terminal receives a paging message sent by the LTE base station, the control terminal executes a CSFB procedure based on the indication information, and in the CSFB procedure, the terminal receives a redirection command sent by the LTE base station.

The CSFB procedure is triggered to be executed when the terminal receives the paging message sent by the LTE base station.

Thus, in the embodiment of the present invention, the CSFB fallback result detection may execute a CSFB procedure based on the indication information indicating that the indication terminal performs the voice service by using a preset CSFB optimization scheme, and in the CSFB execution procedure, the terminal may send a voice call setup request message (which may be detected by the CSFB fallback result detection apparatus) to the target WCDMA cell according to the target WCDMA cell frequency point information, where the target WCDMA cell frequency point information is carried in the redirection command sent by the LTE base station.

In the embodiment of the invention, the terminal is MT, the terminal is registered on an LTE cell, and the terminal sends a request message for establishing voice communication to a target WCDMA cell according to the frequency point information of the target WCDMA cell to realize the called flow of the CS domain.

The called flow of the CS domain may be as follows:

1. triggering an MT CSFB flow, wherein the UE (terminal) receives an PAGING TYPE 1 message on a paging channel sent by an LTE network and starts the CSFB flow;

2. the RRC connection is established by first receiving a request of the non-access stratum from the RRC of the UE and sending an RRC connection establishment request message to the UTRAN, where the message includes the called UE number, the service type, and so on. After receiving the message, UTRAN allocates radio resources according to the network conditions and sends them to UE in RRC CONNECTION SETUP message, and UE configures parameters of each protocol layer according to the message and returns confirmation message.

It should be noted that there are two cases for RRC connection establishment: RRC connection setup on common channels and RRC connection setup on dedicated channels. The difference between the two is that the transport channels used by the RRC connection are different, and thus the flow of connection establishment is different.

3. And (4) establishing Iu signaling connection. After RRC connection establishment, the UE will send a service request to the CN. At this time, the RRC of the UE transmits INITIAL DIRECT TRANSFER a message including information of the non-access stratum (CM SERVICE REQUEST). After receiving the MESSAGE, the RANA of the RNC sends an INITIAL UE MESSAGE, transparently forwards the non-access stratum MESSAGE of the UE to the CN, and establishes Iu signaling connection while sending the MESSAGE. After the Iu signaling connection is established, non-access stratum messaging between the UE and the CN is done using DOWNLINK DIRECT TRANSFER and UPLINK DIRECT TRANSFER messages.

4. And (6) authentication. After Iu signaling connection is established, CN needs to authenticate UE. Authentication is a non-access stratum function, and is transparently transported in UTRAN.

5. And establishing RAB. After the UE service request is received by the network, the CN will allocate a Radio Access Bearer (RAB) according to the service conditions. While the corresponding Radio Bearer (RB) will be established over the air interface.

Note that, if a radio link is established during RRC connection establishment, the above-described radio link reconfiguration procedure is required, and if a radio link is not established during RRC connection, that is, if an RRC connection on a common channel is established, the radio link establishment procedure should be performed here.

6. And (6) responding. At this time, the UE will start to answer and enter the call state.

It should be noted that, in the embodiment of the present invention, after the UE falls back to the WCDMA cell according to the frequency point information of the target WCDMA cell, the UE initiates an RRC Request, the network issues resources of the CS domain to perform CS RAB setup, and the voice call setup is completed, that is, the process of sending the Request message for establishing the voice call to the target WCDMA cell by the terminal according to the frequency point information of the target WCDMA cell is realized.

It should be noted that, in practical application, a network environment applied to the embodiment of the present invention may be constructed in a laboratory simulation manner, that is, a scene where the terminal is located in the embodiment of the present invention is obtained in a simulation manner, so that on one hand, a worker does not need to go to a field for detection, and thus, the cost of the worker can be reduced; on the other hand, the scene of the site may include other factors, so as to affect the detection result, so that the simulation network according to the embodiment of the present invention can stably reproduce the CSFB abnormal scene occurring in the scene of the site, and can eliminate the influence of other factors on the detection result in the scene described in the embodiment of the present invention.

S102, when the voice call request message is responded and the voice call link is successfully established, the trigger terminal receives the routing area update rejection message and starts to detect the voice call state;

when the CSFB fallback result detection device detects that the terminal sends a voice call establishment request message to a target WCDMA cell according to the target WCDMA cell frequency point information, the network responds to the voice call request message and issues the CS domain resources to perform CS RAB setup, so that the voice call establishment is completed, namely a voice call link is successfully established.

Based on this, in some embodiments, a voice call state of the terminal in the WCDMA network, which is located in the emulated network environment, is detected.

It should be noted that, the embodiment of the present invention provides a method for detecting a CSFB fallback result in a scenario that a 3G data service is not opened, so that a terminal rejects a routing area update of a PS domain of a target WCDMA cell, and therefore, when it is detected that a voice call link is successfully established, a CSFB fallback result detection device triggers a network to issue a RAU reject (i.e., a routing area update reject message) to the terminal when simulating a PS domain access, so as to perform detection of a CSFB fallback result, that is, the CSFB fallback result detection device triggers the terminal to receive the routing area update reject message, which results in that the terminal cannot acquire PS domain resources and cannot complete a subsequent RAU flow, and thus, the CSFB fallback result detection device can start to detect a voice call state to detect a CSFB fallback result.

Specifically, when a voice call request message is responded and a voice call link is successfully established, the CSFB fallback result detection device triggers the terminal to receive a routing area update rejection message, and a reject request cause value is analyzed from the routing area update rejection message; and when the reason value of the request rejection is a preset value, starting to detect the voice call state.

Here, the preset values are: and GPRS is not allowed, and the representation does not open 3G service data.

It can be understood that, in the embodiment of the present invention, since the voice call function is normally used when the terminal does not open the 3G service data, the further detection of the fallback result of the CSFB can be performed by monitoring the voice call state when the PS service fails.

It should be noted that the called flow of the PS domain may be:

2. an RRC connection is established.

3. And (4) establishing Iu signaling connection.

4. Authentication and security mode control of the UE.

5. ATTACH. A logical connection between the UE and a Serving GPRS Service Node (SGSN) is established.

6. Service request and Packet Data Protocol (PDP) activation. And the UE non-access stratum sends a service request and activates the PDP.

7. And establishing RAB. After the UE service request is received by the network, the CN will assign a Radio Access Bearer (RAB). A corresponding Radio Bearer (RB) will be established over the air interface.

8. And (6) responding. And the CN responds. When the UE receives the PDP RESPONSE message, a receive IP packet may be sent at this time.

It should be noted that the packet service of the WCDMA system is "real-time online", that is, the user and the network are always connected. Usually, when the ue is turned on, ATTACH operation is performed to establish logical connection with the SGSN. When packet service data transmission is needed, it is sufficient to directly activate the PDP.

In the embodiment of the invention, when the RAB is established, after the UE service request is received by the network, the CN allocates the Radio Access Bearer (RAB), namely the GPRS is not allowed to acquire the PS domain resource.

S103, when the voice call state is detected to be the disconnection state, determining that the fallback result of the CSFB is fallback failure;

when a voice call request message is responded and a voice call link is successfully established, a trigger terminal receives a routing area update rejection message, after a voice call state is detected, when the voice call state is detected to be a disconnected state, a realization result representing a simulated scene without opening 3G service data is inconsistent with a theory, namely, the CSFB process executed by the terminal by adopting a preset CSFB optimization scheme to perform voice service indication information is problematic, a CSFB fallback result detection device determines that a CSFB fallback result is a fallback failure, and then the preset CSFB optimization scheme is failed.

And S104, when the voice call state is detected to be the hold state, determining whether the terminal returns to the LTE network within the preset time length after the voice call in the WCDMA network is finished so as to determine the fallback result of the CSFB.

When the voice call request message is responded and the voice call link is successfully established, the triggering terminal receives the routing area update rejection message, after the voice call state is detected, when the voice call state is detected to be a holding state, the preliminary realization result of the scene representing the simulation without opening the 3G service data is consistent with the theory, the closer confirmation is carried out, and after the voice call in the WCDMA network is detected to be finished, whether the terminal returns to the LTE network within the preset time length or not is detected to determine the CSFB falling result, so that whether the preset CSFB optimization scheme is successful or not is determined.

The preset duration may be set according to needs, and the embodiment of the present invention is not limited.

Here, in practical application, whether the terminal requests the resources of the WCDMA network or not and establishes a voice call can be detected through related signaling; accordingly, whether the voice call of the terminal in the WCDMA network is interrupted or not can be detected through related signaling, and whether the terminal returns to the LTE network within a preset time length or not can be detected through related signaling.

Specifically, (1) when the voice call state is detected to be the hold state, and after the voice call in the WCDMA network is ended, the terminal returns to the LTE network within the preset time duration, it is determined that the fallback result of the CSFB is successful, that is, there is no problem in that the terminal performs the CSFB procedure by using the indication information of the voice service in the preset CSFB optimization scheme, and the fallback result detection device of the CSFB determines that the fallback result of the CSFB is successful, so that the preset CSFB optimization scheme is successful. (2) When the voice call state is detected to be the hold state, after the voice call in the WCDMA network is finished, the terminal does not return to the LTE network within the preset time duration, and when it is detected that the routing area update request message is continuously sent to the WCDMA network, it is determined that the fallback result of the CSFB is the fallback failure, that is, it is problematic that the terminal performs the CSFB procedure by using the indication information of the voice service in the preset CSFB optimization scheme, which causes the fallback result detection device of the CSFB to determine that the fallback result of the CSFB is the fallback failure, and then the preset CSFB optimization scheme is failed.

It can be understood that the voice call state in the CSFB process can be detected in a scenario where the 3G data service is not opened, so that the fallback result of the CSFB is finally determined, detection of the fallback result in the CSFB process is realized, and meanwhile, in a subsequent CSFB process, the success rate of the CSFB process can be improved by further perfecting an optimization scheme, so as to improve the call experience of a user.

Further, as shown in fig. 2, in the method for detecting a fallback result of a CSFB provided in the embodiment of the present invention, when a voice call request message is responded and a voice call link is successfully established, after a trigger terminal receives a routing area update reject message, the method may further include: and S105. The following were used:

s105, detecting that the routing area updating request message is continuously sent to the WCDMA network, and determining that the fallback result of the CSFB is fallback failure.

When the voice call request message is responded and the voice call link is successfully established, the trigger terminal receives the routing area updating rejection message, detects that the routing area updating request message is continuously sent to the WCDMA network, and determines that the fallback result of the CSFB is fallback failure.

Specifically, when a voice call request message is responded and a voice call link is successfully established, the CSFB fallback result detection device triggers the terminal to receive a routing area update rejection message, and a reject request cause value is analyzed from the routing area update rejection message; when the reason value of the rejection request is a preset value, the routing area updating request message is detected to be continuously sent to the WCDMA network, and the fallback result of the CSFB is determined to be fallback failure.

It can be understood that, in the embodiment of the present invention, since the terminal does not send the routing area update request message to the WCDMA network again when the 3G service data is not opened, when it is detected that the routing area update request message is continuously sent to the WCDMA network, it is determined that the fallback result of the CSFB is a fallback failure, that is, it is problematic that the terminal performs a CSFB procedure by using the indication information of the preset CSFB optimization scheme for voice service, so that the fallback result detection apparatus of the CSFB determines that the fallback result of the CSFB is a fallback failure, and then the preset CSFB optimization scheme is failed.

It can be understood that, in the embodiment of the present invention, the apparatus for detecting a fallback result of a CSFB detects whether a preset CSFB optimization scheme in a scene that 3G service data is not turned on is correct (successful) by detecting whether a fallback result of the CSFB is successful in a process that a terminal performs a CSFB execution process using instruction information of a voice service using the preset CSFB optimization scheme, that is, represents whether the preset CSFB optimization scheme used by the terminal is a reasonable CSFB fallback scheme, and meanwhile, implements a method for detecting whether the CSFB optimization scheme is reasonable.

In addition, the voice call state and various request messages of the terminal under the simulation network environment in the WCDMA network are detected, a simulation mode is adopted, workers do not need to go to the site, and other factors influencing detection can be removed, so that the personnel cost can be greatly reduced, and meanwhile, the influence of other factors on the detection result under the scene described by the embodiment of the invention can be eliminated.

The invention is described in more detail below with reference to an application example.

In the embodiment of the application, a network environment is constructed through a simulation platform, and the network environment comprises a Frequency Division Duplex (FDD) -LTE cell and a WCDMA cell; the LTE SIB is configured with WCDMA 1 as neighboring cell information, and the WCDMA SIB18 is configured with LTE neighboring cell information.

The abnormal scene of the application embodiment is as follows: in a scene that 3G service data is not opened, the terminal can still utilize the known CS resources to complete CSFB, so that the validity and the reasonability of the UE side call optimization scheme are verified.

As shown in fig. 3, the method for detecting a CSFB fallback result according to the embodiment of the present application includes the following steps:

s201, UE registers on an LTE cell and carries out an attachment process;

specifically, the UE is an MT, and after the UE is powered on, an Evolved Packet System (EPS) and International Mobile Subscriber Identity (IMSI) attach procedure is first performed.

In the process, the UE is triggered to send an Attach Request message (Attach Request) to the LTE base station, and an Attach Accept message (Attach Accept) sent by the LTE base station is received, wherein the Attach Accept message carries indication information for indicating the terminal to adopt a preset CSFB optimization scheme for voice service. Fig. 4 is a first schematic diagram of an emulation code according to an embodiment of the present invention, where: IMS voice over PS (V) ═ Not supported (0), and represents the instruction information.

S202, the network side triggers the MT CSFB process, the network side sends a Paging message (Paging) to the UE, and the CSFB process is started;

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

Specifically, after receiving an initial address REQUEST (IAM) incoming message, a Mobile Switching Center (MSC) in the network sends an SGsAP-PAGING-REQUEST message to an Mobility Management Entity (MME) according to existing SGs association and MME information, where the SGsAP-PAGING-REQUEST message carries the following information: IMSI, Temporary Mobile Subscriber Identity (TMSI), Service identifier (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 a Paging flow of an air interface. UE establishes connection and sends Extended Service Request message to MME, MME sends SGsAP-Service-Request message to MSC, MSC receives the message, and MSC does not resend paging Request message to MME. In order to avoid the overlong waiting time of the calling party in the call connection process, the MSC receives the SGs Service Request message containing the idle state indication and firstly informs the calling party that the calling party is in the connection process. The MME sends an Initial UE Context Setup message to a base station, wherein the Initial UE Context Setup message carries a CS feedback Indicator, and the CS feedback Indicator is used for indicating that the base station UE needs to fall back to a UMTS Terrestrial Radio Access Network (UTRAN) or a GSM/EDGE Radio Access Network (GERAN, GSM EDGE Radio Access Network) due to CSFB service.

The UE receives LTE _ RRCConnectionRelease signaling, i.e. a redirection command, sent by the LTE base station. The redirection command carries the frequency point information of the target WCDMA cell. As shown in fig. 5, the base station issues an R8 redirection command (rrcConnectionRelease _ R8(0)) to the UE, so as to implement a process in which the terminal sends a request message for establishing a voice call to the target WCDMA cell according to the frequency point information of the target WCDMA cell.

S203, when the voice call request message is responded and the voice call link is successfully established, the CSFB fallback result detection device simulates that 3G service data is not opened through the simulation platform, triggers the terminal to receive the routing area update rejection message and starts to detect the voice call state;

s204, when the voice call state is detected to be the hold state, whether the terminal returns to the LTE network within the preset time length after the voice call in the WCDMA network is finished is determined so as to determine the fallback result of the CSFB;

s205, when the voice call state is detected to be the hold state, and after the voice call in the WCDMA network is finished, the terminal returns to the LTE network within the preset time length, determining that the fallback result of the CSFB is the successful fallback;

s206, when the voice call state is detected to be the holding state, after the voice call in the WCDMA network is finished, the terminal does not return to the LTE network within the preset time length, and when the terminal detects that the routing area updating request message is continuously sent to the WCDMA network, the CSFB fallback result is determined as fallback failure;

s207, when the voice call state is detected to be the disconnected state, determining that the fallback result of the CSFB is fallback failure;

s208, when the voice call request message is responded and the voice call link is successfully established, the CSFB fallback result detection device simulates that 3G service data is not opened through the simulation platform, triggers the terminal to receive the routing area update rejection message, detects that the routing area update request message is continuously sent to the WCDMA network, and determines that the CSFB fallback result is fallback failure.

It should be noted that S203-S207 and S208 and S201-S202 respectively form two detection methods for detecting the fallback result of the CSDB, and specifically, which detection method is used is adopted, or both detection methods are adopted and can be selected according to actual situations, which is not limited in the embodiment of the present invention.

According to the preset CSFB optimization scheme, after the UE finishes the conversation in the WCDMA network, the UE should quickly return to the LTE network.

When the UE cannot return to the LTE network within the preset duration, the UE may attempt a Routing Area Update (RAU) procedure in the WCDMA network, which indicates that the CSFB optimization scheme fails.

In order to implement the method according to the embodiment of the present invention, an embodiment of the present invention further provides a device 1 for detecting a fallback result of a CSFB, where as shown in fig. 6, the device includes:

the voice call unit 10 is configured to, in a CSFB execution process based on instruction information indicating that an instruction terminal performs a voice service by using a preset CSFB optimization scheme, send a voice call establishment request message to a target WCDMA cell according to target WCDMA cell frequency point information, where the target WCDMA cell frequency point information is carried in a redirection command sent by an LTE base station;

a detecting unit 11, configured to detect that the terminal receives a routing area update reject message and start detecting a voice call state when a voice call link is successfully established in response to the voice call request message;

a determining unit 12, configured to determine that a fallback result of the CSFB is a fallback failure when it is detected that the voice call state is a disconnected state; and when the voice call state is detected to be the hold state, determining whether the terminal returns to the LTE network within a preset time length after the voice call in the WCDMA network is finished so as to determine a fallback result of the CSFB.

In an embodiment of the present invention, the apparatus further includes:

the determining unit 12 is further configured to determine that the fallback result of the CSFB is successful when the terminal returns to the LTE network within the preset time after determining that the voice call in the WCDMA network is ended and after determining that whether the terminal returns to the LTE network within the preset time, and after the voice call in the WCDMA network is ended, the terminal returns to the LTE network within the preset time.

In an embodiment of the present invention, the apparatus further includes:

the determining unit 12 is further configured to determine that the fallback result of the CSFB is a fallback failure when determining that after the voice call in the WCDMA network is ended, after the terminal returns to the LTE network within a preset time period, and after the voice call in the WCDMA network is ended, the terminal does not return to the LTE network within the preset time period, and detects that the routing area update request message continues to be sent to the WCDMA network.

In an embodiment of the present invention, the apparatus further includes:

the determining unit 12 is further configured to detect that the terminal continues to send the routing area update request message to the WCDMA network after receiving the routing area update reject message, and determine that the fallback result of the CSFB is a fallback failure.

Based on fig. 6, as shown in fig. 7, in the embodiment of the present invention, the apparatus further includes:

an attachment unit 13, configured to, in a CSFB execution process based on indication information indicating that a terminal performs a voice service by using a preset CSFB optimization scheme, trigger the terminal to send an attachment request message to the LTE base station and receive an attachment acceptance message sent by the LTE base station in response to the attachment request message before the terminal sends a request message for establishing a voice call to a target WCDMA cell according to target WCDMA cell frequency point information, where the attachment acceptance message carries indication information used for indicating that the terminal performs a voice service by using the preset CSFB optimization scheme.

In an embodiment of the present invention, the apparatus further includes:

the analyzing unit 14 is configured to trigger the terminal to receive the routing area update reject message, and analyze a reject request cause value from the routing area update reject message;

the detecting unit 11 is specifically configured to start detecting the voice call state when the request rejection reason value is a preset value.

In practical applications, the detecting unit 11, the determining unit 12, the analyzing unit 14, the voice call unit 10, and the attaching unit 13 may be implemented by a processor 15 in a fall-back result detecting apparatus of a CSFB.

Based on the above hardware implementation of each unit in the CSFB fallback result detection apparatus, in order to implement the embodiments of the present invention, an embodiment of the present invention further provides a CSFB fallback result detection apparatus, as shown in fig. 8, where the CSFB fallback result detection apparatus includes: a processor 15 and a storage medium 16 configured to store a computer program capable of running on the processor 15,

wherein the processor 15 is configured to execute the steps of the above-mentioned CSFB fallback result detection method when running the computer program stored by the storage medium 16.

In practice, of course, the various components of the CSFB fall back result detection device are coupled together by a bus system 17, as shown in fig. 8. It will be appreciated that the bus system 17 is used to enable communications among the components of the connection. The bus system 17 comprises, in addition to a data bus, a power bus, a control bus and a status signal bus. For clarity of illustration, however, the various buses are labeled as bus system 17 in fig. 8.

It should be noted that, when the apparatus for detecting a fallback result of a CSFB provided in the above embodiment performs detection of a fallback result of a CSFB, the above division of each program module is merely used as an example, and in practical applications, the above processing may be distributed to be completed by different program modules according to needs, that is, the internal structure of the apparatus may be divided into different program modules to complete all or part of the above-described processing. In addition, the fall-back result detection apparatus of the CSFB and the fall-back result detection method of the CSFB provided in the above embodiments belong to the same concept, and specific implementation processes thereof are detailed in the method embodiments and are not described herein again.

An embodiment of the present invention provides a computer storage medium, on which computer-executable instructions are stored, and when executed by a processor, the computer-executable instructions implement the method steps of the CSFB fallback result detection method. The computer-readable storage medium may be a magnetic random access Memory (FRAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Flash Memory (Flash Memory), a magnetic surface Memory, an optical disk, or a Compact Disc Read-Only Memory (CD-ROM), among other memories.

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

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

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, all the functional units in the embodiments of the present invention may be integrated into one second processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.

Industrial applicability

The embodiment of the invention provides a CSFB fallback result detection method, a CSFB fallback result detection device and a storage medium.A terminal sends a voice call establishment request message to a target WCDMA cell according to frequency point information of the target WCDMA cell in a CSFB execution process of indicating information of voice service by adopting a preset CSFB optimization scheme based on an indicating terminal, wherein the frequency point information of the target WCDMA cell is carried in a redirection command sent by an LTE base station; when the voice call request message is responded and the voice call link is successfully established, detecting that the terminal receives a routing area update rejection message, and starting to detect the voice call state; when the voice call state is detected to be a disconnected state, determining that the fallback result of the CSFB is fallback failure; when the voice call state is detected to be the hold state, whether the terminal returns to the LTE network within the preset time length after the voice call in the WCDMA network is finished is determined so as to determine the fall back result of the CSFB.

Claims

1. A method for detecting a fallback result of a Circuit Switched Fallback (CSFB), the method comprising:

when the voice call request message is responded and a voice call link is successfully established, detecting that the terminal receives a routing area update rejection message, and starting to detect a voice call state; the routing area updating rejection message is issued when the network simulates PS domain access;

2. The method of claim 1, wherein after determining whether the terminal returns to the LTE network within a preset time period after the voice call in the WCDMA network is ended, the method further comprises:

3. The method of claim 1, wherein after determining whether the terminal returns to the LTE network within a preset time period after the voice call in the WCDMA network is ended, the method further comprises:

4. The method of claim 1, wherein after the terminal receives the routing area update reject message, the method further comprises:

5. The method of claim 1, wherein in the CSFB procedure executed based on the indication information indicating that the terminal performs the voice service using the preset CSFB optimization scheme, before the terminal sends a request message for establishing the voice call to the target WCDMA cell according to the frequency point information of the target WCDMA cell, the method further comprises:

6. The method according to any one of claims 1 to 5, wherein the detecting that the terminal receives the routing area update reject message and starts detecting the voice call state comprises:

7. A fall back result detection apparatus of a CSFB, the apparatus comprising:

a detection unit configured to detect that the terminal receives a routing area update rejection message and start detecting a voice call state when a voice call link is successfully established in response to the voice call request message; the routing area updating rejection message is issued when the network simulates PS domain access;

8. The apparatus of claim 7, further comprising:

9. The apparatus of claim 7, further comprising:

10. The apparatus of claim 7, further comprising:

11. The apparatus of claim 7, further comprising:

12. The apparatus of any one of claims 7 to 11, further comprising:

13. A computer storage medium having stored thereon computer-executable instructions which, when executed by a processor, perform the method steps of any of claims 1-6.