CN101026812B - Method for obtaining session participation user session ability in multi-party communication system - Google Patents

Abstract

The present invention provides a method for obtaining session participation user session ability in a multi-party communication system. The method mainly includes: in the multi-party communication system, the calling user sends a session establishment request to the called user through the session server, and the called user sends The session server returns a negotiation result carrying session capability information; the session server notifies other session participating users of the session capability information of the session participating user. Using the method of the invention, the session participating users can obtain the session capability information of other session participating users according to the notification message sent by the session server.

Description

Method for obtaining session participation user session ability in multi-party communication system

technical field

The invention relates to the field of network communication, in particular to a method for obtaining session participation user session capability in a multi-party communication system.

Background technique

With the development of broadband networks, mobile communications will not be limited to traditional voice communications, but multimedia services that combine audio, video, pictures, text and other media types will gradually develop. The multimedia service can be combined with data services such as presence (presentation service), short message, WEB (web page) browsing, positioning information, PUSH (push service) and file sharing, to provide users with various service services. The various business services include:

Message service: instant message and chat room, multimedia short message, etc.

Video business: entertainment, multimedia information, daily communication, etc.

E-commerce: product catalog, search engine, shopping cart, order management, payment, etc.

Games: single player games, group games, etc.

Positioning business: tracing, guide, alarm, etc.

Personal assistant: address book, calendar, bookmark management, file storage, event reminder, e-mail, etc.

Driven by the application of various business services mentioned above, the 3GPP (Third Generation Partnership Project) standard organization has launched the IP-based IMS (Internet Multimedia Subnet) architecture, which aims to use a standardized open structure in the communication network To achieve a variety of multimedia applications, to provide users with more choices and richer experience.

With the development of network technology, multi-party communication has become a common business. In order to realize multi-party communication, it is necessary to have a unified control point to manage the system, and it is necessary to ensure the consistency and real-time performance of management. For example, when a user applies for sending audio data, the system needs to have one and only one control point to process the application. Current multi-party multimedia communication systems include PoC (Push-to-talk over Cellular) systems, Conference (multimedia conference) systems, and the like. Among them, the PoC system is a centralized control multi-party multimedia communication system.

In a multi-party multimedia communication system, there are situations where users have unequal session capabilities. For example, the calling user initiates a session establishment request to the called user through the session server, and the request requires session capabilities such as A, B, and C, and the called user needs to establish a connection with the calling user, and negotiate according to the calling user's requirements , when there are multiple called users, the conversation capabilities between the called users may be different.

The method for setting up a communication session in a multimedia communication system in the prior art is: in an existing trunking system or PoC system, there is only media sending right management for voice (voice), therefore, if the called user cannot provide voice capability , the session establishment between the calling user and the called user fails.

In the existing multi-party communication system, the session establishment process is as follows: the calling user first sends a session establishment request to the called user through the session server, and the required session capability is carried in the request. The called user negotiates according to the request of the calling user and the session capability of the user terminal, and sends the negotiation result to the session server. When the session server receives the negotiation result sent by the first called user, it notifies the calling user of the negotiation result, and the calling user sends data to all called users according to the negotiation result; Determine the negotiation result according to the requirements of the negotiation, and send data to all called users according to the negotiation result. A schematic diagram of the session establishment process in the above-mentioned existing multi-party communication system is shown in FIG. 1 .

The disadvantage of the method for establishing a communication session in the prior art is that in the existing trunking system or PoC system, if the called user cannot provide the voice capability, it is obviously unreasonable for the session establishment to fail. In fact, according to the Other lower capabilities provided by the user may also use the medium of voice to deliver services. Therefore, this method increases the possibility of session establishment failure,

In the existing multi-party communication system, it is unreasonable to establish a session according to the negotiation result of the first called user, because other called users may have different session capabilities from the first called user. It is also unreasonable to establish a session according to the calling user's requirements all the time, because the calling user does not know whether other called users have the session capability required by the calling user.

Contents of the invention

In view of the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a method for obtaining session capabilities of session participating users in a multi-party communication system, so that session participating users can obtain other session participating users' information according to the message sent by the session server. Conversational ability.

The purpose of the present invention is achieved through the following technical solutions:

A method for obtaining session participation user session capability in a multi-party communication system, the method comprising:

In the multi-party communication system, the calling user sends a session establishment request to the called user through the session server, and the called user returns a negotiation result carrying session capability information to the session server;

The session server notifies the session participating users of the session capability information of the session participating users.

As can be seen from the technical solution provided by the present invention above, the present invention sends a subscription message to the session server through the session participating user, and the session server returns a notification message to the session participating user; or, the session server actively sends a message to the session participating user, which can make the session The participating user obtains the session capability information of other session participating users saved by the session server. The session participating user can perform subsequent session adjustment operations according to the obtained session capability information of other session participating users.

Description of drawings

FIG. 1 is a schematic diagram of the process of establishing a session in an existing multi-party communication system;

Fig. 2 is the specific processing flowchart of the embodiment of the method of the present invention;

Fig. 3 is the schematic diagram that the calling user according to the present invention obtains the session capability information of each called user according to the message actively sent by the session server;

FIG. 4 is a schematic diagram of the calling user obtaining the session capability information of each called user by sending a subscription message to the session server.

Detailed ways

The invention provides a method for obtaining session participation user session ability in a multi-party communication system. The core of the invention is: the session server sends the session information of the called user carried in the negotiation results received from each called user to it. The ability information is saved, and during or after the session establishment process, by sending a notification message to the session participating user, the session participating user can obtain the session ability information of other session participating users saved by the session server.

The method of the present invention is described in detail below in conjunction with the accompanying drawings. The specific processing flow of the embodiment of the method of the present invention is shown in Figure 2, including the following steps:

Step 2-1. The calling user sends a session establishment request to the called user through the session server, and the called user returns a negotiation result carrying session capabilities to the session server.

In multi-party multimedia communication systems such as PoC and Conference, the SIP (Session Initiation Protocol, Session Initiation Protocol) protocol is generally run between the calling user, the session server and the called user.

The calling user first sends a session establishment request to the session server, and the request carries required session capabilities, which include session description, timing description, media type and format description and other information. Media type and format descriptions include transport protocols, port numbers, and other media parameters. For example, the required session capabilities may be capabilities A (audio, audio), V (video, video), T (text, text), etc., and the session server forwards the received session establishment request to each called user.

After receiving the session establishment request forwarded by the session server, the called user conducts negotiation according to the request of the calling user, the session capability of the user terminal or the willingness of the user terminal, etc., and returns information carrying the session capability (such as A, T) to the session server result of the negotiation. The called user can transmit the negotiation result by sending a 200 OK message of the SIP protocol to the session server. The results returned by multiple users are not necessarily all the same. For example, a user can feedback support A, V; but another user feedback A, T, and so on. After receiving the negotiation result sent by the first called user, the session server saves the session capability information of the called user carried in the negotiation result, and then Call the user to answer;

Or, after receiving the negotiation result sent by the first called user, the session server saves the session capability information of the called user carried in the negotiation result, and responds to the calling user according to the request of the calling user , that is, send data information such as A, V, T to the calling user;

Or, after the session server receives the negotiation results sent by one or more called users, it saves the session capability information of the called users carried in the negotiation results, and the session server receives part or all of the called user After the negotiation result, according to the policy of the session or according to the setting of the operator, generate a result according to the received negotiation result, and then answer the calling user according to the generated result. After the received negotiation results are processed by session policies or operator settings, the generated results can be the largest set of negotiation results: the union of all negotiation results; the smallest set of negotiation results: all negotiation results The intersection; it can be a subset of the negotiation result: it refers to the cancellation of some session capabilities through policies or configurations.

The aforementioned users participating in the session include the calling user and the called user.

Step 2-2: The session server sends the session capability information of other part or all of the session participating users to the session participating user.

After the session server saves the session capability information of each session participating user, during or after the session establishment process, the session server directly sends other part or all of the session participating user's session capability information to each session participating user. For example, the session server may send a 200 OK message of the SIP protocol carrying the session capability information of the called user to the calling user. After receiving the above message sent by the session server, the calling user obtains the session capability information of each called user. For example, users 2, 3, and 4 receive A, T, and users 5, 6, and 7 receive A, V, and T, etc.

FIG. 3 is a schematic diagram of the above-mentioned calling user obtaining the session capability information of each called user according to the message actively sent by the session server.

The session participating user can also send a subscription message to the session server during or after the session establishment process. After the session server receives the subscription message, it returns to the session participating user the session capability that carries other part or all of the session participating user saved. Informational notification message. The subscription message may be implemented through a Subscribe (subscribe) message of the SIP protocol. The notification message may also be implemented through a Notify (notification) message of the SIP protocol. That is, the called user can also obtain session capability information of other part or all of the called users by sending a subscribe message to the session server.

FIG. 4 is a schematic diagram of the calling user obtaining the session capability information of each called user by sending a subscription message to the session server.

After the session participating user obtains the session capability information of some or all other session participating users, the subsequent session adjustment operation can be performed. For example, the session participating user sends session data supported by its session data capability to other session participating users, for example, sending V data to some called users, and sending A and T data to some called users; or, the session participating user The user initiates a renegotiation process in the session through the session server to add or cancel part of the session capabilities; or, the session participating user performs priority management of multi-type media transmission rights for other session participating users through the session server.

The above-mentioned multi-party communication system includes: a PoC (Push to Talk over Cellular) system or a Conference (multimedia conference) system. When the session member of the present invention accesses the session through multiple servers, the session server is a centralized control server in multi-party communication, such as, in a PoC system, it is a PoC server (PoC Server Performing Controlling PoC Function) that performs a control function. ).

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (14)

1. A method of obtaining session participation user session capabilities in a multi-party communication system, the method comprising:

in a multi-party communication system, a calling user sends a session establishment request to a called user through a session server, and the called user returns a negotiation result carrying session capability information to the session server;

the session server informs the session participating users of session capability information of the session participating users.

2. The method of claim 1, wherein the sending of the session establishment request from the calling user to the called user through the session server specifically comprises:

the calling user sends a session establishment request to a session server, the request carries the required session capability information, and the session server transfers the received session establishment request to the called user.

3. The method according to claim 2, wherein the step of the called user returning the negotiation result carrying the session capability information to the session server specifically comprises:

the called user negotiates according to the session capability required by the calling user and the session capability of the user terminal, and returns a negotiation result carrying session capability information to the session server.

4. The method of claim 1, 2 or 3, further comprising:

and the session server stores the session capability information of the called user carried in the negotiation result and responds to the calling user.

5. The method according to claim 4, wherein said answering said calling subscriber specifically comprises:

after receiving the negotiation result returned by the first called user, the session server responds to the calling user according to the negotiation result of the first responded called user;

or,

after receiving the negotiation result returned by the first called user, the session server responds to the calling user according to the request of the calling user;

or,

and after receiving the negotiation result of part or all of the called users, the session server generates a result according to the received negotiation result according to a session strategy or the setting of an operator, and then responds to the calling user according to the generated result.

6. The method according to claim 1, 2 or 3, wherein the notifying, by the session server, the session capability information of the session participating user specifically comprises:

and in the session establishing process or after the session is established, the session server informs the session participating users of the saved session capability information of part or all of the session participating users.

7. The method according to claim 6, wherein the notifying, by the session server, the session capability information of the saved part or all of the session participating users to the session participating users specifically comprises:

when the session server receives the subscription message of the session participant, the session server sends the session capability information of part or all of the session participants to the session participant who sends the subscription message, or

And the session server directly sends the session capability information of part or all of the session participating users to the session participating users.

8. The method of claim 4, further comprising:

and after the session participation user obtains the session capacity information of the session participation user, carrying out subsequent session adjustment operation.

9. The method of claim 8, wherein the adjusting operation of the subsequent session comprises:

the session participating user sends session data supported by the session data sending capability to other session participating users;

or,

the session participating user initiates a renegotiation process in the session through the session server, and adds or cancels part of session capacity;

or,

and the session participating users perform priority management of multi-type media sending rights on other session participating users through the session server.

10. The method of claim 6, further comprising:

and after the session participation user obtains the session capacity information of the session participation user, carrying out subsequent session adjustment operation.

11. The method of claim 10, wherein the adjusting operation of the subsequent session comprises:

the session participating user sends session data supported by the session data sending capability to other session participating users;

or,

the session participating user initiates a renegotiation process in the session through the session server, and adds or cancels part of session capacity;

or,

and the session participating users perform priority management of multi-type media sending rights on other session participating users through the session server.

12. The method of claim 1, wherein the session participating user comprises: a calling subscriber and/or a called subscriber.

13. The method of claim 1, wherein the multi-party communication system comprises: a push-to-talk over cellular, PoC, system or a multimedia Conference system.

14. The method according to claim 1, wherein said session capabilities comprise session descriptions and/or timing descriptions and/or media type and format descriptions.

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