CN1984309A - Method for realizing dialing set in multi-medium video-signal system - Google Patents

Abstract

The present invention provides a method for implementing call set in a multimedia video system: the initiating terminal sends a private call set request message to the multimedia video system through a soft switch; the multimedia video system sends a private call request message to the initiating terminal through a soft switch call set response message; the multimedia video system creates a multimedia video conference according to the private call set request message; the multimedia video system summons the terminals to participate in the conference to participate in the conference according to the conference information. In the present invention, the call set requests of all terminals are unified by the softswitch agent to interact with the multimedia video system, and the call set service authentication is uniformly performed on the soft switch to ensure the security of the multimedia video system; in addition, the present invention extends SIP The INFO message of the protocol carries the private call set message in the message body, and the soft switch transparently transmits the call set message of the terminal to the multimedia video system, which solves the problem of private network traversal of the call set.

Description

Realization Method of Call Set in Multimedia Video System

technical field

The invention relates to the technical field of multimedia communication, in particular to a method for realizing a calling set of a multimedia video system.

Background technique

With the rapid development and popularization of Internet technology, people's demand for multimedia services is more and more extensive, among which video conferencing is widely used in large and medium-sized enterprises. The multimedia video system is specially used to provide users with multimedia conference functions, and its structure is shown in Figure 1, including: gatekeeper 10, MCU (MultipointControl Unit, multipoint control unit) 20, multimedia conference management equipment 30, terminal 40, terminal 50 and Terminal 60, wherein the softswitch 10 is used to manage user terminals and provide users with access to the multimedia video system, such as performing address translation, access control and bandwidth management on audio/video data streams; MCU20 mainly performs meeting calling and meeting control processing, and controls Each terminal 40, 50, 60 performs audio/video communication; the multimedia conference management device 30 mainly performs background processing such as conference customization, conference management, and billing.

There are many ways to use the multimedia video system to customize the conference. One is that the user can pre-order the conference information on the multimedia conference management device 30; among them, the function of calling a conference on the multimedia video system needs to be unified on the multimedia video system. For scheduled conferences and conference requests, the multimedia video system will call the users to join the conference. However, since all operations in this method are performed in the multimedia video system, it is difficult for users to carry out personalized services.

The other is that the terminal exchanges call set messages with the multimedia video system through a private protocol, and directly customizes and requests conferences on the terminal. The terminal reports the pre-defined conference information to the multimedia conference management device. When the meeting time arrives, the The multimedia video system initiates a call to the participating users to call these terminals into the conference. The specific implementation process is shown in Figure 2, including the following steps:

In step s101, the initiating terminal sends an access request message to the gatekeeper, and the message includes information such as specific terminal identifiers to participate in the conference and the time of the conference.

In step s102, after receiving the request message, the gatekeeper requests the MCU to create a multimedia conference.

In step s103, after the MCU successfully creates the conference, it sends information for registering the multimedia conference to the gatekeeper.

In step s104, after receiving the conference registration information, the gatekeeper responds with an access confirmation message to the initiating terminal.

Step s105, when the predetermined condition is met, the initiating terminal calls the MCU to request to join the multimedia conference.

In step s106, the MCU calls other terminals to join the multimedia conference.

In this method, the terminal is directly managed by the GK, and the terminal directly interacts with the multimedia video system to complete functions such as conference calling, and service authentication cannot be performed. In addition, due to the existence of various firewalls in the actual operation network, the private protocol used for the call set may be filtered during private network traversal, and the conference function cannot be completed.

Contents of the invention

The problem to be solved by the present invention is to provide a method for realizing the calling set of the multimedia video system, so as to solve the defects in the prior art that the multimedia information passes through the private network and the data is lost, and the multimedia data cannot be authenticated.

In order to solve the above-mentioned problems, the present invention provides a method for implementing a call set in a multimedia video system, comprising the following steps:

A. The initiating terminal sends a private calling set request message to the multimedia video system through the soft switch;

B. The multimedia video system sends a private calling set response message to the initiating terminal through the softswitch;

C. The multimedia videoconferencing system creates a multimedia videoconferencing conference according to the private calling set request message, and the message includes terminal identifiers and conference information to participate in the conference;

D. The multimedia video system calls the terminals to participate in the conference to participate in the conference according to the conference information.

A1. The initiating terminal sends a private call set request message to the softswitch;

A2. The soft switch encapsulates the private calling set request message into a location request message, and sends it to the multimedia video system.

The multimedia video system obtains the private calling set request message from the location request message.

B1. The multimedia video system encapsulates the private calling set response message as a location confirmation message and sends it to the softswitch;

B2. The softswitch decodes the private calling set response message from the location confirmation message, and sends it to the initiating terminal.

Between step A1 and step A2 also include:

The softswitch authenticates the private call set request message.

The authentication is performed according to whether the terminal has the right to call set on the softswitch or whether it is registered for the set call service.

The initiating terminal sends a private calling set request message to the softswitch through the SIP protocol, and receives a private calling set response message from the softswitch.

The private call set request message and the private call set response message respectively carry private information.

The private message in the private call set request message includes: the length of the private call set request message, the content type of the private call set request, and the content body of the private call set request; the private call set response The private information in the message includes: the length of the private calling set response message, the content type of the private calling set response and the content body of the private calling set response.

Step D further comprises:

D1. The multimedia video system sends a meeting notification message to the terminal to join the meeting through the soft switch, and the message includes the time and content of the meeting;

D2. The terminal sends a conference participation response to the multimedia video system.

The softswitch and the multimedia video system communicate through their respective gatekeepers.

The terminal to participate in the conference communicates with the softswitch through the session initiation protocol SIP, H.323, media gateway control protocol MGCP or H.248 protocol.

Compared with the prior art, the present invention has the following advantages:

In the present invention, the multimedia video system is used as an application service resource inside the softswitch, and the call set requests of all terminals are uniformly interacted by the softswitch agent and the multimedia video system, and the call set service authentication is uniformly performed on the softswitch. Ensure the security of the multimedia video system.

Further, the present invention expands the INFO message of the SIP protocol, carries the calling group private message in the message body, and makes the calling group function in-band (under the same protocol), and the calling group of the terminal is transparently transmitted by the softswitch. Integrating messages to the multimedia video system solves the problem of private network traversal of the calling party.

Description of drawings

Fig. 1 is the structural diagram of prior art multimedia video system;

Fig. 2 is the flow chart of prior art multimedia video conferencing;

Fig. 3 is the flow chart of the implementation method of the calling set of the multimedia video system of the present invention;

Fig. 4 is a networking diagram of a SIP calling party calling a voice phone user to participate in a conference in the present invention;

Fig. 5 is a message flow chart of the SIP calling group in the present invention.

Detailed ways

The process flow of the implementation method of the multimedia video system calling set of the present invention is shown in Figure 3, including the following steps:

In step s201, the initiating terminal sends a private calling set request message to the multimedia video system through the softswitch. Wherein, the initiating terminal first sends a private call set request message to the soft switch, and the soft switch encapsulates the private call set request message into a location request message and sends it to the multimedia video system.

In step s202, the multimedia video system sends a private calling set response message to the initiating terminal through the soft switch. Wherein, the multimedia video system first encapsulates the private calling set response message into a location confirmation message, and sends it to the softswitch, and then, the softswitch decodes the private calling set response message from the location confirmation message, and sends it to the The initiating terminal.

In step s203, the multimedia video system obtains a private call set request message from the location request message, and the multimedia video system creates a multimedia video conference according to the private call set request message, and the message includes terminal identifiers and conference information to participate in the conference.

In step s204, the multimedia video system calls the terminals to join the conference according to the conference information. Among them, firstly, the multimedia video system sends a conference notification message to the terminals that want to join the conference through the soft switch, and the message includes the time and content of the conference; then each terminal that wants to participate in the conference sends a meeting participation response to the multimedia video system.

In addition, the softswitch in step s201 may also perform authentication on the private calling set request message. The authentication is performed according to whether the terminal has the right to call set on the softswitch or whether it is registered for the set call service. Only when the terminal has the call center authority on the softswitch and registers the call center service, can it call a multimedia video conference.

In the above process, the initiating terminal sends a private call set request message to the softswitch through the SIP (Session Initiation Protocol) protocol, and receives a private call set response message from the softswitch. Among them, the private call set request message and the private call set response message respectively carry private information; the private message in the private call set request message includes: private call set request message length, private call set Request content type and private call set request content body; private messages in private call set response message include: private call set response message length, private call set response content type, and private call set response content body.

A specific application example of the implementation method of the above-mentioned multimedia video system call set is shown in FIG. Among them, the SIP videophone 300 communicates with the softswitch 200 through the SIP protocol; other voice terminals 400 and H.323 videophone 500 to participate in the conference access the softswitch through various protocols (such as SIP/H323/MGCP/H248, etc.) The switch 200 ; the multimedia video system 100 serves as the internal application service resource of the soft switch 200 , interacts with the soft switch 200 through the H323 protocol, and connects with the GK-GK relay.

The specific implementation process is shown in Figure 5, including:

In step s301, the SIP video phone customizes conference information on the terminal, and initiates a call set by sending a special type of INFO message to the softswitch, and the INFO message body encapsulates a private call set request message. Among them, the INFO message includes: content length content-length, which is used to fill in the length of the private call set request message, content type, which is used to identify the conference type, and message body, which is used to identify the content of the private call set request message .

Step s302, after the softswitch receives the special type of INFO message, it decodes the message body to obtain the private call set request message, and first authenticates the user, such as according to whether the user has the call set authority on the soft switch, whether to register The call set service is used for authentication; after the authentication is passed, the softswitch encapsulates the private call set request message into the non-standard field of the LRQ (Location Request, location request) message and transparently transmits it to the multimedia video system.

In step s303, the multimedia video system decodes the private call set request message from the LRQ message for processing (calling users into a conference), and after processing, encapsulates the private call set response message into an LCF message and sends it to the softswitch.

In step s304, the softswitch decodes the LCF (Location confirm) message to obtain the private calling set response message, and encapsulates it into a special type of 200 message body and sends it to the SIP videophone. The SIP videophone receives the 200 message, decodes it to obtain the private call set response message encapsulated in the message body, and prompts the user that the conference is successfully held. Among them, the 200 message includes: content length content-length, which is used to fill in the length of the private call set response message, content type content-type, which is used to identify the conference type, and message body, which is used to identify the content of the private call set response message .

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 (12)

1. A method for implementing a call set in a multimedia video system, characterized in that it comprises the following steps: A. The initiating terminal sends a private calling set request message to the multimedia video system through the softswitch; B. The multimedia video system sends a private calling set response message to the initiating terminal through the softswitch; C. The multimedia videoconferencing system creates a multimedia videoconferencing conference according to the private calling set request message, and the message includes terminal identifiers and conference information to participate in the conference; D. The multimedia video system calls the terminals to participate in the conference to participate in the conference according to the conference information. 2. The method for realizing the calling set of the multimedia video system according to claim 1, characterized in that, A1. The initiating terminal sends a private call set request message to the softswitch; A2. The soft switch encapsulates the private calling set request message into a location request message, and sends it to the multimedia video system. 3. The method for realizing the call set of the multimedia video system according to claim 2, wherein the multimedia video system obtains the private call set request message from the location request message. 4. The method for realizing the calling set of the multimedia video system according to claim 2 or 3, characterized in that, B1. The multimedia video system encapsulates the private calling set response message as a location confirmation message and sends it to the softswitch; B2. The softswitch decodes the private calling set response message from the location confirmation message, and sends it to the initiating terminal. 5. The method for realizing the calling set of the multimedia video system according to claim 2, characterized in that, between step A1 and step A2, further comprising: The softswitch authenticates the private call set request message. 6. The method for implementing call set in the multimedia video system according to claim 5, wherein the authentication is performed according to whether the terminal has the call set authority on the softswitch or whether it is registered with the call set service. 7. The method for implementing call set in a multimedia video system according to claim 1, wherein the initiating terminal sends a private call set request message to the softswitch through the SIP protocol, and receives the private call set from the softswitch. Call set response message. 8. The method for implementing the call set of a multimedia video system according to claim 7, wherein the private message is carried in the private call set request message and the private call set response message respectively. 9. The method for implementing the call set of a multimedia video system according to claim 8, wherein the private message in the private call set request message includes: the length of the private call set request message, the length of the private call set Set call request content type and private call set request content body; the private message in the private call set response message includes: private call set response message length, private call set response content type and private main Call set response content body. 10. The method for realizing the calling set of the multimedia video system according to claim 1, characterized in that step D further comprises: D1. The multimedia video system sends a meeting notification message to the terminal to join the meeting through the soft switch, and the message includes the time and content of the meeting; D2. The terminal sends a conference participation response to the multimedia video system. 11. The method for implementing call set in a multimedia video system according to claim 1, wherein the softswitch communicates with the multimedia video system through respective gatekeepers. 12. The method for realizing the call set of the multimedia video system according to claim 1, wherein the terminal to participate in the conference communicates with the softswitch through the session initiation protocol SIP, H.323, media gateway control protocol MGCP or H.248 protocol communication.

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