CN101394443B - Method, system and device for in-band number receiving - Google Patents

Abstract

The embodiment of the present invention discloses a method for in-band number collection, which includes: receiving a message sent by an application server during a user call, the message carrying a service access code for an in-band DTMF service; receiving the user's in-band Dialing information, matching the in-band dialing information of the user with the service access code of the in-band DTMF service sent by the application server, and if the matching is successful, sending the in-band dialing information to the application server. In the embodiment of the present invention, the service control network element AS issues the digitmap information required by the service, the access network element or the access terminal issues the digitmap to the media gateway, and the media gateway matches the user's in-band dialing information according to the digitmap information , it needs to be reported only after the matching is successful, which reduces security risks.

Description

A method, system and device with internal number collection

technical field

The present invention relates to the technical field of communication, in particular to a method, system and equipment for in-band number collection.

Background technique

At present, many services use in-band DTMF (Dual Tone Multi Frequency) detection. The detection method is through terminal or access network element detection, and then reported to AS (Application Server, application server) for processing.

In the prior art, after the terminal or the access network element detects the user's in-band dialing information, it reports to the AS bit by bit in an out-of-band manner. In the SIP protocol, the INFO method can be used to transmit the DTMF signal. When the AS needs to provide the service of detecting in-band DTMF signaling, it is generally determined by the configuration of the access network element or the terminal, and all the in-band dialing information of the user is reported to the AS bit by bit through INFO.

In the prior art, each network element in the IMS starts to track a specific number, so that information such as the user's card number and password can be easily obtained. Therefore, the existing method of reporting the user's in-band dialing information bit by bit through the out-of-band mode has certain potential safety hazards.

Contents of the invention

The embodiment of the present invention provides a method, system and equipment for in-band number collection, which can avoid leakage of user's private information at the signaling level when the network side requires detection of in-band DTMF signals.

In order to achieve the above purpose, an embodiment of the present invention provides a method for receiving numbers with an internal number, including:

The access device receives the INFO message sent by the application server during the user call, converts the digitmap information carried in the INFO message into a format supported by the media gateway according to the media gateway capability, and sends it to the media gateway. The message carries the XML script of the digitmap information, including the service access code of the in-band DTMF service;

The media gateway receives the user's in-band dialing information, matches the user's in-band dialing information with the service access code of the in-band DTMF service sent by the application server, and if the matching is successful, then sends the in-band dialing information to the The application server, if the matching is unsuccessful, does not report the in-band dial-up information to the application server.

An embodiment of the present invention provides a system with internal numbers, including:

The access device is used to receive the INFO message sent by the application server during the user call, convert the digitmap information carried in the INFO message into a format that the media gateway can support according to the media gateway capability, and send it to the media gateway, The message carries the XML script of the digitmap information, including the service access code of the in-band DTMF service;

The application server is configured to send a message carrying the service access code required by the application server to the access device;

The media gateway is used to receive the user's in-band dialing information during the user's call, and match the user's in-band dialing information with the service access code of the in-band DTMF service sent by the application server. If the matching is successful, the The in-band dial-up information is sent to the application server, and if the matching is unsuccessful, the in-band dial-up information is not reported to the application server.

An embodiment of the present invention provides an application server, including:

The sending unit is used for sending the message carrying the service access code required by the application server to the access device after the checking unit confirms that the service that needs to detect the in-band dialing information is signed;

The access device is used to receive the INFO message sent by the application server during the user call, convert the digitmap information carried in the INFO message into a format that the media gateway can support according to the media gateway capability, and send it to the media gateway, The message carries the XML script of the digit map information, which includes the service access code of the in-band DTMF service, and sends the in-band dialing information from the media gateway to the application server;

The receiving unit is used to receive the in-band dialing information matched with the service access code required by the application server, so that the media gateway matches the user's in-band dialing information with the service access code of the in-band DTMF service sent by the application server, If the matching is successful, the in-band dialing information is sent to the application server; if the matching is unsuccessful, the in-band dialing information is not reported to the application server.

An embodiment of the present invention provides an access device, including:

The receiving unit is used to receive the INFO message from the application server, which carries the XML script of the digitmap information, including the service access code of the in-band DTMF service;

The forwarding unit converts the digitmap information carried in the INFO message into a format supported by the media gateway according to the media gateway capability, and sends it to the media gateway; If the matching is successful, the in-band dialing information is sent to the application server; if the matching is unsuccessful, the in-band dialing information is not reported to the application server.

An embodiment of the present invention provides a media gateway, including:

The access code receiving unit is configured to receive the message carrying the service access code required by the application server sent by the application server; wherein the access device is configured to receive the INFO message sent by the application server during the user call , converting the digitmap information carried in the INFO message into a format that the media gateway can support according to the capabilities of the media gateway, and sending it to the media gateway, the message carries the XML script of the digitmap information, including the service of the in-band DTMF service access code;

The in-band dialing information receiving unit is used for receiving the in-band dialing information sent by the user during the user's call;

a matching unit, configured to match the user in-band dialing information received by the in-band dialing information receiving unit with the service access code received by the access code receiving unit, and if the matching is successful, the in-band dialing information sent to the application server.

Compared with the prior art, the embodiments of the present invention have at least the following advantages:

In the embodiment of the present invention, the service control network element AS issues the digitmap information required by the service, the access network element or the access terminal issues the digitmap to the media gateway, and the media gateway matches the user's in-band dialing information according to the digitmap information , it needs to be reported only after the matching is successful, which reduces security risks.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or 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 These are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is a flow chart of a method for receiving numbers within a band in Embodiment 1 of the present invention;

Fig. 2 is a flow chart of the call switching service in Embodiment 2 of the present invention;

Fig. 3 is a kind of system structural diagram with internal number in the embodiment of the present invention;

FIG. 4 is a structural diagram of an application server in an embodiment of the present invention;

FIG. 5 is a structural diagram of an access device in an embodiment of the present invention;

Fig. 6 is a structural diagram of a media gateway in an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

Embodiment 1 of the present invention provides a method with internal number collection, as shown in Figure 1, including:

Step 101, during the user's call, receive a message sent by the application server, the message carries the service access code of the in-band DTMF service; wherein, the service access code can be carried in the digitmap information.

Step 102: Receive the user's in-band dialing information, match the user's in-band dialing information with the service access code of the in-band DTMF service sent by the application server, and if the matching is successful, send the in-band dialing information to the application server. If the matching is unsuccessful, the in-band dial-up information is not reported to the application server.

Before step 101, it also includes:

Before receiving the service access code sent by the application server, it also includes:

During the call, the application server checks whether the calling user has subscribed to the service that needs to detect in-band dialing information, and if so, sends a message carrying the service access code required by the application server to the access device.

Wherein, receiving the message sent by the application server includes: the access device receives the message sent by the application server, converts the service access code of the in-band DTMF service carried in the message into a format supported by the media gateway, and sends it to the media gateway.

In Embodiment 1 of the present invention, the service control network element AS issues the service access code corresponding to the service, the access network element or the access terminal issues the service access code to the media gateway, and the media gateway matches the user according to the service access code The in-band dial-up information needs to be reported only after the matching is successful.

In the second embodiment of the present invention, the call switching service is taken as an example to illustrate the cooperation between the AS and the access device (such as an access network element or an access terminal) to realize the in-band number collection process. For IMS (IP Multimedia Subsystem, IP Multimedia Subsystem), the access terminal is SIP (Session Initiated Protocol, Session Initiation Protocol) IAD (Integrated Access Device) under PCSCF (Proxy Call Session Control Function, proxy call control function) ), SIP terminals, soft terminals, etc. Access network elements refer to MGCF (Media Gateway Control Function, Media Gateway Control Function), AGCF (Access Gateway Control Function, Access Gateway Control Function), etc.

First, user A (calling user) establishes a call with user B (called user), the specific path is: user A>-access device A>-AS(A)>-AS(B)>-access device B>-User B. The call switching service is that during the call between the calling user and the called user, the calling user or the called user directly presses the button to switch the call to the third user. The main application scenario of the service is that the user transfers the call between the mobile phone and the fixed-line Any switching between the phone and the soft terminal can be performed, and the original call does not need to be interrupted during the whole switching process.

As shown in Figure 2, assuming that the access code of the call switching service is *17, before the calling user and the called user establish a call, the calling user or the called user can bind a third user. The calling user or the called user switches to "access code*17+the number of the third user". The specific process includes the following steps, and the description of the called side is omitted:

Step 201, AS (A) judges that the calling user has subscribed to the call switching service (whether the called user has signed the call switching service is judged by the AS (B) to which the called user belongs), and can judge whether the calling user has signed the call switching service according to the identification information of the calling user Switching services can be indicated by setting a new identification bit, or using a combined identification that is not used by existing bits.

Step 202, if user A and user B have signed a call switching service, the AS sends an INFO message to the access device, and the message carries an XML (The Extensible Markup Language) script of DigitMap (digit map) information, including Business access code. The AS uses the DigitMap to request the access device to collect the number, and makes the gateway of the access device match the received number with the service access code contained in the DigitMap, and report to the AS when the match is successful. DigitMap can be sent to the gateway through the access device after the user calls, and the user is required to dial; it can also be used to collect new services, such as card number, password, voice category, etc.

The content in the specific script is not limited, as long as it can carry the digitmap information including the service access code, such as *17*x.|*17#, the example of the digitmap information is as follows:

Step 203: After receiving the INFO message carrying the digitmap information, the access device converts the digitmap information into a format that the media gateway can support according to the capabilities of the media gateway, and sends it to the media gateway, so that the media gateway can include The service access code matches the user's in-band dialing information, and the in-band dialing information can only be reported if it matches exactly.

In step 204, the gateway sends 200 to the AS, indicating that the gateway has obtained the capability of matching the access code and the digitmap information.

Step 205, user A sends in-band DTMF dialing information *17*88888888# to the access terminal or the access gateway;

Step 206, the gateway judges that the in-band DTMF sent by the user matches the access code included in the digitmap information, and then sends an INFO message to the AS, and the INFO message carries *17*88888888#. When the user does not dial over time or the matching fails, only the event is reported, and the in-band DTMF information sent by the user is not reported. The gateway transmits the DTMF information to the peer end according to the normal media path. Therefore, if the user dials services such as telephone banking, the matching will fail, and private information such as the user's card number and password will not be reported to the AS, resulting in leakage.

Step 207, after receiving the AS, send 200 to the gateway.

In step 208, the AS performs service processing. For example, for call switching, the AS will initiate a call to user C (the number is 888888 entered by the user), and after connecting with C, release A, and enter the call between B and C, thus realizing the switching between users A and C.

In addition, in step 206, if the in-band DTMF sent by the user fails to match the access code included in the digitmap information, the gateway will not report the mismatched in-band DTMF information to the AS, but will send the DTMF information according to The normal media path is transmitted to the peer media gateway and user.

In addition, the AS can send an access code to the gateway, and the gateway will match the user's comfortable in-band DTMF information according to the access code; if the AS sends more than two access codes to the gateway (for example, the user has two DTMF service), the gateway can match the in-band DTMF information input by the user according to these access codes. If it matches one of the access codes, the matching is successful, and the in-band dialing information is reported to the AS. If the matching fails, Then the in-band dialing information is not reported, and the gateway transmits the DTMF information to the peer end according to the normal media path.

In Embodiment 2 of the present invention, the service control network element AS issues the digitmap information including the service access code, the access network element or the terminal issues the digitmap to the media gateway, and the media gateway transmits the digitmap information according to the service access code contained in the digitmap information. The input code matches the user's in-band dialing information, and it needs to be reported only after the matching is successful.

The embodiment of the present invention provides a system with internal numbers, as shown in FIG. 3 , including: an application server 310, configured to send a message carrying a service access code required by the application server 310 to the media gateway 330; the media gateway 330 , during the user's call, receive the user's in-band dialing information, match the user's in-band dialing information with the service access code of the in-band DTMF service sent by the application server 310, if the matching is successful, then the in-band dialing information Send to the application server 310.

The system for in-band number collection also includes an access device 320, which is used for converting the format of the message carrying the service access code of the in-band DTMF service from the application server 310, and sending it to the media gateway 330, and sending the message from the media The in-band dialing information of the gateway 330 is sent to the application server 310 .

Wherein, the access device may include an access network element or an access terminal.

An embodiment of the present invention provides an application server, as shown in FIG. 4 , including: a sending unit 410, configured to send a message carrying a service access code required by the application server 310 to an access device; a receiving unit 420, configured to The in-band dialing information matching the service access code required by the application server 310 is received.

The application server also includes a checking unit 430, which is used to check whether the calling user has subscribed to a service that needs to detect in-band dialing information, and if so, trigger the sending unit 410.

An embodiment of the present invention provides an access device, as shown in FIG. 5 , including: a receiving unit 510, which receives a message carrying a service access code of an in-band DTMF service from an application server; After format conversion, the message is sent to the media gateway.

An embodiment of the present invention provides a media gateway, as shown in FIG. 6 , including: an access code receiving unit 610, configured to receive a message carrying a service access code required by the application server sent by the application server; The unit 620 is configured to receive the in-band dialing information sent by the user during the user's call; the matching unit 630 is configured to combine the user's in-band dialing information received by the in-band dialing information receiving unit 620 with the user's in-band dialing information received by the access code receiving unit 610 The service access code is matched, and if the match is successful, the in-band dialing information is sent to the application server.

In the embodiment of the present invention, the service control network element AS issues the digitmap information required by the service, the access device issues the digitmap to the media gateway, and the media gateway matches the user's in-band dialing information according to the digitmap information. Only after the matching is successful Only need to report. That is, only the specific number information required by the AS is detected, and other dial-up information of the user, such as the card number and password entered by the user, is directly suppressed at the media level and is not reflected in the signaling, thereby preventing the private information of the user from being leaked in the IMS leakage. At the media level, in-band DTMF signals can be transmitted encrypted, such as 2833. Therefore, if these private information can be suppressed at the media level, it can ensure that the end-to-end solution to the telephone banking leakage problem can be ensured in IMS.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by hardware, or by means of software plus a necessary general-purpose hardware platform. Based on this understanding, the technical solution of the present invention can Embodied in the form of software products, the software products can be stored in a non-volatile storage medium (which can be CD-ROM, U disk, mobile hard disk, etc.), and include several instructions to make a computer device (which can be A personal computer, a server, or a network device, etc.) executes the methods described in various embodiments of the present invention.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (8)

1. A method with an internal number, characterized in that it comprises: The access device receives the INFO message sent by the application server during the user call, converts the digitmap information carried in the INFO message into a format supported by the media gateway according to the media gateway capability, and sends it to the media gateway. The message carries the XML script of the digitmap information, including the service access code of the in-band DTMF service; The media gateway receives the user's in-band dialing information, matches the user's in-band dialing information with the service access code of the in-band DTMF service sent by the application server, and if the matching is successful, then sends the in-band dialing information to the The application server, if the matching is unsuccessful, does not report the in-band dial-up information to the application server. 2. The method according to claim 1, further comprising: During the call, the application server checks whether the calling user has subscribed to the service that needs to detect in-band dialing information, and if so, sends a message carrying the service access code required by the application server to the access device. 3. A system with internal numbers, characterized in that it comprises: The access device is used to receive the INFO message sent by the application server during the user call, convert the digitmap information carried in the INFO message into a format that the media gateway can support according to the capabilities of the media gateway, and send it to the media gateway , the message carries the XML script of the digitmap information, including the service access code of the in-band DTMF service; The application server is configured to send a message carrying the service access code required by the application server to the access device; The media gateway is used to receive the user's in-band dialing information during the user's call, and match the user's in-band dialing information with the service access code of the in-band DTMF service sent by the application server. If the matching is successful, the The in-band dial-up information is sent to the application server, and if the matching is unsuccessful, only the event is reported, and the in-band dial-up information is not reported to the application server. 4. The system according to claim 3, wherein the access device comprises an access network element or an access terminal. 5. An application server, characterized in that, comprising: a sending unit, configured to send a message carrying a service access code required by the application server to the access device; The access device is used to receive the INFO message sent by the application server during the user call, convert the digitmap information carried in the INFO message into a format that the media gateway can support according to the media gateway capability, and send it to the media gateway, The message carries the XML script of the digit map information, which includes the service access code of the in-band DTMF service, and sends the in-band dialing information from the media gateway to the application server; The receiving unit is used to receive the in-band dialing information matched with the service access code required by the application server, so that the media gateway matches the user's in-band dialing information with the service access code of the in-band DTMF service sent by the application server, If the matching is successful, the in-band dialing information is sent to the application server; if the matching is unsuccessful, the in-band dialing information is not reported to the application server. 6. The application server according to claim 5, further comprising: The checking unit is used to check whether the calling user has subscribed to a service that needs to detect in-band dialing information, and if so, trigger the sending unit. 7. A media gateway, characterized in that, comprising: The access code receiving unit is used to receive the INFO message sent by the application server and carries the service access code required by the application server; wherein the access device is used to receive the INFO message sent by the application server during the user call, Convert the digitmap information carried in the INFO message into a format that the media gateway can support according to the media gateway capability, and send it to the media gateway. The message carries the XML script of the digitmap information, including the service interface of the in-band DTMF service. Encode; The in-band dialing information receiving unit is used for receiving the in-band dialing information sent by the user during the user's call; a matching unit, configured to match the user in-band dialing information received by the in-band dialing information receiving unit with the service access code received by the access code receiving unit, and if the matching is successful, the in-band dialing information sent to the application server, if the matching is unsuccessful, only the event is reported, and the in-band dial-up information is not reported to the application server. 8. An access device, characterized in that it comprises: The receiving unit is used to receive the INFO message from the application server, which carries the XML script of the digitmap information, including the service access code of the in-band DTMF service; The forwarding unit converts the digitmap information carried in the INFO message into a format supported by the media gateway according to the capabilities of the media gateway, and sends it to the media gateway; so that the media gateway combines the user's in-band dialing information with the in-band DTMF sent by the application server The service access code of the service is matched, and if the matching is successful, the in-band dialing information is sent to the application server; if the matching is unsuccessful, the in-band dialing information is not reported to the application server.

Images