CN106231570A - The automatic repeating method of data of a kind of unstructured supplementary data traffic and device - Google Patents

Abstract

The invention discloses a data automatic retransmission method and device for an unstructured supplementary data service. The method includes the following steps: sending the data of the unstructured supplementary data service USSD to a network operator server; acquiring the data returned by the network operator server USSD return message; determine whether the USSD return message is failure information that data transmission fails due to network reasons; if the USSD return message is failure information that data transmission fails due to network reasons, cancel the default report of the USSD return message The mechanism of the application layer of the system resends USSD data to the network operator server, which can reduce the manual operation of the user and improve the user experience. In addition, the processing operations of the present invention can be directly processed at the RIL layer of the system, which greatly speeds up the processing.

Description

A data automatic retransmission method and device for unstructured supplementary data services

technical field

The present invention relates to the technical field of mobile communication, and more specifically relates to a data automatic retransmission method and device for unstructured supplementary data services.

Background technique

Unstructured Supplementary Data Service USSD (Unstructured Supplementary Service Data) is a new real-time online interactive session data service based on the Global System for Mobile Communications GSM network. Data is a new service launched on the basis of GSM short message system technology.

The system structure of the USSD service and the SMS service is the same, and both use the signaling channel of the network to transmit information. However, sometimes the network is busy or unknown errors cause the USSD data to fail to be sent. At this time, the mobile terminal will receive a message from the network operator. The USSD data returned by the server fails to send a return message, and the return message will be reported to the application layer of the system by default, so that it will be displayed on the screen to remind the user that the data transmission failed. At this time, the user can only manually resend it once, which will be inconvenient. User operation, reducing the user experience.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned defects in the prior art, and provide a data automatic retransmission method and device for unstructured supplementary data services that can reduce user manual operations and improve user experience.

In order to achieve the above object, the first aspect of the present invention provides a method for automatic data retransmission of unstructured supplementary data services, including the following steps:

Send the data of the unstructured supplementary data service USSD to the server of the network operator;

Obtain the USSD return message returned by the network operator server;

Judging whether the USSD return message is failure information that data transmission fails due to network reasons;

If the USSD return message is failure information that data transmission fails due to network reasons, then cancel the default mechanism of reporting the USSD return message to the application layer of the system, and re-send the USSD data to the network operator server.

As preferably, the step of obtaining the USSD return message returned by the network operator server, judging whether the USSD return message is a step of failure information that data transmission fails due to network reasons, and re-sending USSD data to the network operator server The steps are all processed at the radio interface RIL layer of the system.

As preferably, the step of obtaining the USSD return message returned by the network operator server specifically includes:

Make the RIL.java of the RIL layer monitor whether the Modem layer of the system receives the USSD return message returned by the network operator server through the message communication mechanism of the Modem;

After the Modem layer of the system receives the USSD return message returned by the network operator server, the USSD return message is obtained at the RIL layer.

As preferably, the step of judging whether the USSD return message is failure information that data transmission fails due to network reasons specifically includes:

Obtain all the information contained in the USSD return message by checking the unorganized additional service data instruction at the RIL layer;

Analyzing all the information contained in the USSD return message, so as to determine whether it contains an error code that fails to send data due to network reasons;

If it contains an error code for data transmission failure due to network reasons, it is determined that the USSD return message is failure information for data transmission failure due to network reasons.

As preferably, the method also includes the following steps:

When the number of times of failure to resend USSD data to the network operator server reaches the preset threshold, the resending operation is stopped, and the USSD return message is reported to the application layer of the system to notify the user of data transmission failure.

The second aspect of the present invention provides a data automatic retransmission device for unstructured supplementary data services, including:

The data sending module is used to send the data of the unstructured supplementary data service USSD to the network operator server;

The return information obtaining module is used to obtain the USSD return message returned by the network operator server;

A return message judging module, used to judge whether the USSD return message is failure information that data transmission fails due to network reasons;

The retransmission processing module is used to cancel the default mechanism of reporting the USSD return message to the application layer of the system if the USSD return message is the failure information that the data transmission fails due to network reasons, and controls the data transmission module to send the data to the network again. The carrier server sends USSD data.

Preferably, the processing operations of the return information acquisition module, return message judgment module and retransmission processing module are all processed at the radio interface RIL layer of the system.

As preferably, the return information acquisition module specifically includes:

The monitoring unit is used to make the RIL.java of the RIL layer monitor whether the Modem layer of the system receives the USSD return message returned by the network operator server through the message communication mechanism of the Modem;

The first obtaining unit is used to obtain the USSD return message at the RIL layer after the Modem layer of the system receives the USSD return message returned by the network operator server.

As preferably, the return message judging module specifically includes:

The second obtaining unit is used to obtain all the information contained in the USSD return message by viewing the unorganized additional service data instruction at the RIL layer;

The judging unit is used to analyze all the information contained in the USSD return message, thereby judging whether it contains an error code that fails to send data due to network reasons; and if it includes an error code that fails to send data due to network reasons, Then it is determined that the USSD return message is failure information that data transmission fails due to network reasons.

As preferably, the retransmission processing module is also used to control the data sending module to stop the retransmission operation when the number of failures of the data sending module to resend USSD data to the network operator server reaches a preset threshold, and send the The USSD returns a message to the application layer of the system to notify the user that the data transmission failed.

Compared with prior art, the beneficial effect of the present invention is:

The present invention sets the data automatic retransmission mechanism of the unstructured supplementary data service USSD, and when the USSD return message returned by the network operator server is obtained, it will judge whether the USSD return message is failure information that the data transmission fails due to network reasons If so, cancel the default mechanism of reporting the USSD return message to the application layer of the system, and automatically resend the USSD data to the network operator server, which can reduce the manual operation of the user and improve the user experience.

Further, the processing operations of the present invention can be directly performed at the RIL layer of the system, which can more quickly obtain the message of USSD data transmission failure and facilitate the processing of related operations, greatly speeding up the processing.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are For some embodiments of the present invention, those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a flow chart of a data automatic retransmission method for an unstructured supplementary data service provided by the present invention;

Fig. 2 is a flowchart of another data automatic retransmission method for unstructured supplementary data services provided by the present invention;

Fig. 3 is an information structure diagram of a USSD return message provided by the present invention,

FIG. 4 is a structural block diagram of an automatic data retransmission device for an unstructured supplementary data service provided by the present invention;

Fig. 5 is a structural block diagram of another device for automatic data retransmission of unstructured supplementary data services provided by the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The method and device for automatic data retransmission of unstructured supplementary data services provided by the embodiments of the present invention can be applied to mobile terminals, and the mobile terminals include smart phones, tablet computers or other electronic devices supporting unstructured supplementary data services.

Based on the Android system, the system architecture of the mobile terminal can be divided into four layers: Modem layer, RIL (Radio Interface) layer, framework layer and application layer from bottom to top.

Fig. 1 is a flow chart of a data automatic retransmission method for an unstructured supplementary data service in an embodiment of the present invention. As shown in the figure, the method of this embodiment includes the following steps:

Step S101, sending the data of the unstructured supplementary data service USSD to the network operator server;

Initially, the mobile terminal can send the data of the unstructured supplementary data service USSD to the network operator server at the application layer of the system, and then transfer information with the network side.

Step S102, obtaining the USSD return message returned by the network operator server;

After the mobile terminal sends the data of the unstructured supplementary data service USSD to the network operator server, the network operator server will return a message to the USSD returned by the mobile terminal, wherein the Modem layer of the system will first receive the USSD return message, However, the processing of the Modem layer is more complicated. Usually, the message is not processed, but directly reported. Therefore, the RIL layer, the framework layer, and the application layer can theoretically obtain the USSD return message received from the network operator server. However, because the RIL layer is The layer that directly communicates with the Modem layer, considering the time required for reporting, it is the most convenient and fastest to process directly at the RIL layer. Therefore, the received USSD return message fed back by the network operator server may preferably be obtained at the RIL layer and processed in the following steps.

Step S103, judging whether the USSD return message is failure information that data transmission fails due to network reasons;

Wherein, the USSD return message returned by the network operator server may include a data sending success message and a data sending failure message. When the mobile terminal transmits a message to the network operator server, the network sometimes has a busy network or an unknown error, which causes the USSD data to fail to be sent, and the USSD returns the data information contained in the message according to the feedback (such as: error code or other identification information) to determine whether the data transmission fails due to network reasons, and if the data transmission fails due to network reasons, then execute step S104.

Step S104, cancel the default mechanism of reporting the USSD return message to the application layer of the system, and resend the USSD data to the network operator server.

In the prior art, by default, if the USSD return message is failure information that data transmission fails due to network reasons, the Modem layer of the system will report the USSD return message to the application layer of the system to notify the user, and in this implementation In step S104 of the example, it may be preferable to directly resend the USSD data to the network operator server at the RIL layer without reporting to the application layer. Of course, it can also be processed at the framework layer of the system.

The method of the embodiment of the present invention sets the data automatic retransmission mechanism of the unstructured supplementary data service USSD, which can reduce the manual operation of the user and improve the user experience.

Fig. 2 is a flow chart of another method for automatic data retransmission of unstructured supplementary data services in an embodiment of the present invention. The method of the present embodiment is designed based on the MTK platform, and as shown in the figure, the method of the present embodiment comprises the following steps:

Step S201, sending the data of the unstructured supplementary data service USSD to the network operator server;

Initially, the mobile terminal can send the data of the unstructured supplementary data service USSD to the network operator server at the application layer of the system, and then transfer information with the network side.

Step S202, making the RIL.java of the RIL layer monitor whether the Modem layer of the system has received the USSD return message returned by the network operator server through the message communication mechanism of the Modem;

Step S203, when the Modem layer of the system receives the USSD return message returned by the network operator server, obtain the USSD return message at the RIL layer;

Among them, the mobile terminal can monitor the RIL_UNSOL_ON_USSD message in the RIL.java file of the system RIL layer. When the Modem layer receives the USSD return message, the Modem layer can send the USSD return message through an unorganized additional service data command (ie AT+CUSD). Send it to RILD (a module in the RIL layer), and RILD sends it to RIL.java through a socket (socket), so that the USSD return message can be obtained at the RIL layer.

Step S204, at the RIL layer, obtain all the information contained in the USSD return message by checking the unorganized additional service data instruction;

The AT command is the communication method between the Modem layer of the MTK platform and the RIL layer, and the RIL layer can obtain all the data information contained in the USSD return message by viewing the unorganized additional service data command (ie AT+CUSD). It is the method for MTK to obtain the information contained in the USSD return message. Fig. 3 is the information structure of the obtained USSD return message.

Step S205, analyzing all the information contained in the USSD return message, so as to determine whether it contains an error code that fails to send data due to network reasons;

Wherein, step S205 can be performed in RILD of the RIL layer, or can be performed in RIL.java, and it is preferable to perform processing in RIL.java in this embodiment.

As shown in FIG. 3 , the USSD return message includes code information such as 0, 2, and 4, which represent whether the data is sent successfully or other meanings.

Exemplarily, the definition of the code information included in the USSD return message may be as follows:

static final int USSD_MODE_NOTIFY = 0;

static final int USSD_MODE_REQUEST = 1;

static final int USSD_MODE_NW_RELEASE = 2;

static final int USSD_MODE_LOCAL_CLIENT = 3;

static final int USSD_MODE_NOT_SUPPORTED = 4;

static final int USSD_MODE_NW_TIMEOUT=5.

According to the above definition, both 4 and 5 are error codes representing the failure of data transmission due to network reasons. If there is an error code for data transmission failure due to network reasons, it is determined that the USSD return message is due to network reasons. If the failure information fails to be sent, step S206 is executed.

Step S206, cancel the default mechanism of reporting the USSD return message to the application layer of the system, and re-send the USSD data to the network operator server;

During specific operations, if the USSD return message is failure information that data transmission fails due to network reasons, it can be processed directly at the RIL layer, and the USSD data is resent to the network operator server without reporting to the application layer.

Step S207, when the number of failures to resend USSD data to the network operator server reaches the preset threshold, stop the resending operation, and report the USSD return message to the application layer of the system to notify the user of data transmission failure.

In specific implementation, the threshold can preferably be set to 3 times, and of course it can also be set to other times, but the number of failures is too many, and the continuous retransmission will increase the burden on the system. Therefore, in this embodiment, when the number of failures in resending USSD data reaches 3 times, the resending operation can be stopped and the user can be notified of the data sending failure.

The processing steps of the method in the embodiment of the present invention can be directly carried out at the RIL layer of the system, which can obtain the message of USSD data transmission failure faster and facilitate the processing of related operations, greatly speeding up the processing.

It should be noted that the data automatic retransmission method of the unstructured supplementary data service of the present invention can also be designed on the basis of the Qualcomm platform or platforms provided by other platform providers. Yes, you only need to call the interface through the relevant commands set by each platform to get the USSD return message, so you are not limited to the "AT+CUSD" command provided by the MTK platform to get the USSD return message.

Fig. 4 is a structural block diagram of a data automatic retransmission device for unstructured supplementary data services in an embodiment of the present invention. As shown in the figure, the device in this embodiment includes a data sending module 1, a return information acquisition module 2, a return The principle of the message judging module 3 and the retransmission processing module 4 will be described in detail below.

The data sending module 1 is used to send the data of the unstructured supplementary data service USSD to the network operator server;

Specifically, the data sending module 1 can send the data of the unstructured supplementary data service USSD to the network operator server at the application layer of the system during the initial sending, and then transfer information with the network side.

The return information obtaining module 2 is used to obtain the USSD return message returned by the network operator server;

After the mobile terminal sends the data of the unstructured supplementary data service USSD to the network operator server, the network operator server will return a message to the USSD returned by the mobile terminal, wherein the Modem layer of the system will first receive the USSD return message, However, the processing of the Modem layer is more complicated. Usually, the message is not processed, but directly reported. Therefore, the RIL layer, the framework layer, and the application layer can theoretically obtain the USSD return message received from the network operator server. However, because the RIL layer is The layer that directly communicates with the Modem layer, considering the time required for reporting, it is the most convenient and fastest to process directly at the RIL layer. Therefore, the processing operations of the returned information acquiring module 2, the returned message judging module 3 and the retransmission processing module 4 can preferably be processed at the RIL layer of the system.

The return message judging module 3 is used to judge whether the USSD return message is failure information that data transmission fails due to network reasons;

Wherein, the USSD return message returned by the network operator server may include a data sending success message and a data sending failure message. When the mobile terminal transmits a message to the network operator server, the network sometimes has situations such as network busyness or unknown errors that cause the USSD data to fail to be sent, and the return message judging module 3 returns the data information contained in the message according to the USSD feedback (such as : error code or other identification information) can determine whether the data transmission fails due to network reasons, and if the data transmission fails due to network reasons, the retransmission processing module 4 can be started.

The retransmission processing module 4 is used to cancel the default mechanism of reporting the USSD return message to the application layer of the system if the USSD return message is the failure information that the data transmission fails due to network reasons, and controls the data transmission module to send the data to the system again. The network operator server sends USSD data.

In the prior art, by default, if the USSD return message is failure information that data transmission fails due to network reasons, the Modem layer of the system will report the USSD return message to the application layer of the system to notify the user, and in this implementation In an example, the retransmission processing module 4 can control the data sending module to directly resend the USSD data to the network operator server at the RIL layer, without reporting to the application layer. Of course, it can also be processed at the framework layer of the system.

The device in the embodiment of the present invention is provided with an automatic data retransmission mechanism of the unstructured supplementary data service USSD, which can reduce manual operations of the user and improve user experience.

Fig. 5 is a structural block diagram of another unstructured supplementary data service data automatic retransmission device in an embodiment of the present invention. As shown in the figure, on the basis of the device in the above embodiment, the device in this embodiment also includes Data sending module 1, return information acquisition module 2, return message judgment module 3 and retransmission processing module 4, processing operations of the data sending module 1, return information acquisition module 2, return message judgment module 3 and retransmission processing module 4 Both are processed directly at the RIL layer of the system.

In addition, further, the return information acquisition module 2 specifically includes:

Monitoring unit 21 is used to make the RIL.java of the RIL layer monitor whether the Modem layer of the system receives the USSD return message that the network operator server returns through the message communication mechanism of the Modem;

The first obtaining unit 22 is configured to obtain the USSD return message at the RIL layer after the Modem layer of the system receives the USSD return message returned by the network operator server.

The monitoring unit 21 can monitor the RIL_UNSOL_ON_USSD message in the RIL.java file of the system RIL layer. When the Modem layer receives the USSD return message, the Modem layer can send the USSD return message through an unorganized additional service data instruction (ie AT+CUSD) to RILD (a module in the RIL layer), and the RILD sends it to RIL.java through a socket (socket), so that the first obtaining unit 22 can obtain the USSD return message at the RIL layer.

Optionally, in this embodiment, the return message judging module 3 specifically includes:

The second obtaining unit 31 is configured to obtain all the information contained in the USSD return message by viewing the unorganized additional service data instruction at the RIL layer;

The AT command is the communication method between the Modem layer of the MTK platform and the RIL layer, and the RIL layer can obtain all the data information contained in the USSD return message by viewing the unorganized additional service data command (ie AT+CUSD). It is the method for MTK to obtain the information contained in the USSD return message. Fig. 3 is the information structure of the obtained USSD return message.

The judging unit 32 is used to analyze all the information contained in the USSD return message, thereby judging whether it contains an error code that causes data transmission failure due to network reasons; and if it contains an error code that causes data transmission failure due to network reasons , it is determined that the USSD return message is failure information that the data transmission failed due to network reasons.

Further, the processing operation of the judging unit 32 may be specifically performed in the RILD of the RIL layer, or may be performed in RIL.java, and in this embodiment, the processing is preferably performed in RIL.java.

As shown in FIG. 3 , the USSD return message includes code information such as 0, 2, and 4, which represent whether the data is sent successfully or other meanings.

Exemplarily, the definition of the code information included in the USSD return message may be as follows:

static final int USSD_MODE_NOTIFY = 0;

static final int USSD_MODE_REQUEST = 1;

static final int USSD_MODE_NW_RELEASE = 2;

static final int USSD_MODE_LOCAL_CLIENT = 3;

static final int USSD_MODE_NOT_SUPPORTED = 4;

static final int USSD_MODE_NW_TIMEOUT=5.

According to the above definition, both "4" and "5" are error codes representing the failure of data transmission due to network reasons. Failure information of data sending failure due to network reasons.

If the judging unit 32 judges that the USSD return message is failure information that the data transmission fails due to network reasons, the retransmission processing module 4 can directly process at the RIL layer, and the control data transmission module 1 directly re-transmits the data to the network operator at the RIL layer. The server sends USSD data without reporting to the application layer.

As a preferred embodiment, the retransmission processing module 4 can also be used to control the data transmission module to stop the retransmission operation when the number of times the data transmission module fails to resend USSD data to the network operator server reaches a preset threshold, And report the USSD return message to the application layer of the system, so as to notify the user that the data sending fails.

During specific implementation, the threshold can preferably be set to 3 times, and of course it can also be set to other times, but the number of failures is too many, and the continuous retransmission will increase the burden on the system. Therefore, in this embodiment, when the number of times of failure to resend data reaches 3 times, the resend operation can be stopped and the user can be notified of the failure to send data.

The processing steps of the device in the embodiment of the present invention can be directly performed at the RIL layer of the system, which can more quickly obtain the message of USSD data transmission failure and facilitate the processing of related operations, greatly speeding up the processing.

It should be noted that the data automatic retransmission device for the unstructured supplementary data service provided by the above-mentioned embodiment is only illustrated by dividing the above-mentioned functional modules. In practical applications, the above-mentioned functions can be allocated by different Completion of functional modules means that the internal structure of the system is divided into different functional modules to complete all or part of the functions described above.

Those of ordinary skill in the art can understand that all or part of the steps in the method of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the described Storage media, such as ROM/RAM, magnetic disk, optical disk, etc.

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (10)

1. A data automatic retransmission method for unstructured supplementary data services, characterized in that the method comprises the following steps: Send the data of the unstructured supplementary data service USSD to the server of the network operator; Obtain the USSD return message returned by the network operator server; Judging whether the USSD return message is failure information that data transmission fails due to network reasons; If the USSD return message is failure information that data transmission fails due to network reasons, then cancel the default mechanism of reporting the USSD return message to the application layer of the system, and re-send the USSD data to the network operator server. 2. The data automatic retransmission method of the unstructured supplementary data service according to claim 1, characterized in that, the step of obtaining the USSD return message returned by the network operator server determines whether the USSD return message is due to The steps of failure information of data transmission failure caused by network reasons and the steps of re-sending USSD data to the network operator server are all processed at the wireless interface RIL layer of the system. 3. The data automatic retransmission method of the unstructured supplementary data service according to claim 2, wherein the step of obtaining the USSD return message returned by the network operator server specifically comprises: Make the RIL.java of the RIL layer monitor whether the Modem layer of the system receives the USSD return message returned by the network operator server through the message communication mechanism of the Modem; After the Modem layer of the system receives the USSD return message returned by the network operator server, the USSD return message is obtained at the RIL layer. 4. The data automatic retransmission method of the unstructured supplementary data service according to claim 1, 2 or 3, wherein the judging whether the USSD return message is failure information that data transmission fails due to network reasons The steps specifically include: Obtain all the information contained in the USSD return message by checking the unorganized additional service data instruction at the RIL layer; Analyzing all the information contained in the USSD return message, so as to determine whether it contains an error code that fails to send data due to network reasons; If it contains an error code for data transmission failure due to network reasons, it is determined that the USSD return message is failure information for data transmission failure due to network reasons. 5. The data automatic retransmission method of the unstructured supplementary data service according to claim 1, characterized in that the method further comprises the following steps: When the number of times of failure to resend USSD data to the network operator server reaches the preset threshold, the resending operation is stopped, and the USSD return message is reported to the application layer of the system to notify the user of data transmission failure. 6. A data automatic retransmission device for unstructured supplementary data services, characterized in that the device includes: The data sending module is used to send the data of the unstructured supplementary data service USSD to the network operator server; The return information obtaining module is used to obtain the USSD return message returned by the network operator server; A return message judging module, used to judge whether the USSD return message is failure information that data transmission fails due to network reasons; The retransmission processing module is used to cancel the default mechanism of reporting the USSD return message to the application layer of the system if the USSD return message is the failure information that the data transmission fails due to network reasons, and controls the data transmission module to send the data to the network again. The carrier server sends USSD data. 7. The data automatic retransmission device for unstructured supplementary data services according to claim 6, characterized in that, the processing operations of the return information acquisition module, return message judgment module and retransmission processing module are all in the system's wireless The interface is handled by the RIL layer. 8. The data automatic retransmission device for unstructured supplementary data services according to claim 7, wherein the return information acquisition module specifically includes: The monitoring unit is used to make the RIL.java of the RIL layer monitor whether the Modem layer of the system receives the USSD return message returned by the network operator server through the message communication mechanism of the Modem; The first obtaining unit is used to obtain the USSD return message at the RIL layer after the Modem layer of the system receives the USSD return message returned by the network operator server. 9. The data automatic retransmission device for unstructured supplementary data services according to claim 6, 7 or 8, wherein the return message judging module specifically includes: The second obtaining unit is used to obtain all the information contained in the USSD return message by viewing the unorganized additional service data instruction at the RIL layer; The judging unit is used to analyze all the information contained in the USSD return message, thereby judging whether it contains an error code that fails to send data due to network reasons; and if it includes an error code that fails to send data due to network reasons, Then it is determined that the USSD return message is failure information that data transmission fails due to network reasons. 10. The data automatic retransmission device of the unstructured supplementary data service according to claim 6, characterized in that, the retransmission processing module is also used for failing to send the USSD data to the network operator server again when the data sending module When the number of times reaches the preset threshold, the data sending module is controlled to stop the resending operation, and reports the USSD return message to the application layer of the system, so as to notify the user that the data sending fails.