KR100911364B1 - Method, server and system for monitoring participants in multi-participants conference service based on session initiation protocol - Google Patents

Abstract

A method, a server and a system for monitoring participants in a multi-participants conference service based on a session initiation protocol are provided to supply a smooth procedure and call of a multiuser conference by providing the state information in real time. A service registration manager(110) transmits a service response message by receiving a service request message to which a terminal identification information is included. The service registration manager registers the terminal identification information to a service subscriber list, and an event monitoring manager(120) monitors the change of the state information of the conference participant terminal. If the state information is changes, the state information providing manager(130) provides the changed state information to the registered requester terminal in order to receive a state notification response message.

Description

Method for providing real-time participant monitoring service in SIP-based multi-party conference, conference management server and conference system for it {Method, Server and System for Monitoring Participants in Multi-Participants Conference Service based on Session Initiation Protocol}

The present invention relates to a method for providing a real-time participant monitoring service in a SIP-based multiparty conference, a conference management server, and a conference system. More specifically, when providing a multi-party conference service, by monitoring and providing real-time status information on the participant terminal information, withdrawal status, call availability and new participant terminal information in real time, provides smooth progress and calls of the multi-party conference, By providing real-time participant monitoring service to authorized (authorized) terminal only through terminal authentication function, a method for providing real-time participant monitoring service in SIP-based multi-party conference, which enhances security of the conference. Relates to a management server and a conference system.

Currently, a Voice of IP (VoIP) service or a Multimedia over IP (MoIP) server is being implemented, and such a service requires a session establishment protocol such as a Session Initiation Protocol (SIP). Among these SIP-based services, multi-party conference service is expected as a killer application.

In order to facilitate the progress of the multi-party conference and call when providing the multi-party conference service, a function of real-time monitoring and providing status information on participant terminal information, withdrawal status, call availability status and new participant terminal information is required. However, the conventional SIP-based multi-party conference service has a problem that cannot provide such a real-time participant monitoring service. In addition, the conventional SIP can provide a Presence supplementary service defined in the SUBSCRIBE method, but is limited to the function of informing the other party's callable state during a 1: 1 call or 1: 1 text chat, Real-time participant monitoring service cannot be provided.

An object of the present invention for solving this problem, by providing a real-time monitoring status information on the participant terminal information, withdrawal status, call availability and new participant terminal information when providing the multi-party conference service, smooth progress of the multi-party conference And providing a currency.

Another object of the present invention for solving this problem is to provide a real-time participant monitoring service only to the authorized (authorized) terminal by performing a terminal authentication function, to enhance the security of the conference.

According to an aspect of the present invention for achieving the above object, in a conference management server for providing conference status information to the requester terminal, receiving a service request message containing the terminal identification information from the requester terminal to transmit a service response message; A service registration manager to register the terminal identification information to a service subscriber list; An event occurrence monitoring manager for monitoring whether the conference participant terminal state information is changed; And a status information provision management unit configured to receive the status information notification response message by providing the changed status information in the status information notification message to the requestor terminal registered in the service subscriber list when the status information is changed. Provides a conference management server that provides real-time participant monitoring services in SIP-based multi-party conferences.

According to another aspect of the present invention for achieving this object, a method for providing conference status information to a requester terminal, the conference management server, (a) by receiving a service request message containing the terminal identification information from the requester terminal A service registration management step of transmitting a service response message to the requester terminal and registering the terminal identification information in a service subscriber list; (b) an event occurrence monitoring management step of monitoring whether the conference participant terminal state information is changed; And (c) providing the status information notification response message by including the changed status information in the status information notification message to the requestor terminal registered in the service subscriber list when the status information is changed. It provides a real-time participant monitoring service providing method in a SIP-based multi-party conference, characterized in that.

According to another aspect of the present invention for achieving the above object, in a conference system for providing conference status information to the requester terminal, receiving a service request message containing the terminal identification information from the requester terminal to service the requester terminal When the status information is changed by transmitting a response message, registering the terminal identification information in a service subscriber list, and monitoring whether or not the status information of a conference participant terminal is changed, the changed state to the requestor terminal registered in the service subscriber list. A conference management server that includes information in a status information notification message and receives the status information notification response message; And a wired / wireless communication network for communication between the conference management server, the conference participant terminal, and the requestor terminal.

As described above, according to the present invention, when providing a multi-party conference service, by real-time monitoring and providing status information on participant terminal information, withdrawal status, call availability status and new participant terminal information, smooth progress of the conference and call Has the effect of providing.

In addition, by using the present invention, by performing a terminal authentication function, providing a real-time participant monitoring service only to the authorized (authorized) terminal, there is an effect of enhancing the security for the conference.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function is obvious to those skilled in the art or may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a schematic diagram of a conference system for providing real-time participant monitoring service in a SIP-based multi-party conference according to the present invention.

Referring to FIG. 1, a conference system that provides conference status information to the requestor terminal 30 receives a service request message including terminal identification information from the requester terminal 30 and sends a service response message to the requester terminal 30. Transmits, registers the terminal identification information in the service subscriber list, monitors whether or not the status information of the conference participant terminal 20 is changed, and when the status information is changed, the changed status information to the requestor terminal 30 registered in the service subscriber list. And a wired / wireless communication network for communication between the conference management server 10, the conference management server 10, the conference participant terminal 20, and the requester terminal 30 that receive the status information notification response message by including the information in the status information notification message. 40, including.

Referring to FIG. 1, in order for a conference participant terminal 20 including a terminal 21, a terminal 22, a terminal 23, and a terminal 24 to conduct a multi-party conference, the conference participant terminal 20 and the conference management server 10 may be connected to each other. A session establishment protocol for establishing a session must be performed, and the present invention is a session establishment protocol and standard document RFC developed by the Internet Engineering Task Force (IETF), which defines a standard of an Internet operating protocol such as TCP / IP. (Request for Comments) Provides real-time participant monitoring services using Session Initiation Protocol (SIP) and SIP SUBSCRIBE / NOTIFY methods defined in RFC 3265, the standard document for SIP Specific Event Notification. .

Referring to FIG. 1, the requester terminal 30 requests a corresponding service from the conference management server 10 and registers terminal identification information such as its own SIP URL in the service subscriber list in the conference management server 10, thereby providing a conference. The real-time participant monitoring service may be provided from the management server 10.

Referring to FIG. 1, the requestor terminal 30 may be a conference participant terminal such as terminal 21 and terminal 22, or may be a conference participant terminal such as terminal 31. The requestor terminal 30 will be described in detail with reference to FIG. 4 as follows.

Referring to FIG. 4, when a conference participant terminal including a terminal A, a terminal B, and a terminal C establishes a conference session with a conference management server (F) based on a SIP and performs a SIP-based multiparty conference, Request a real-time participant monitoring service that receives status information such as conference participant information, participation information, withdrawal information, terminal power off information, and call availability information for the conference participant terminal through the SUBSCRIBE method ( The requestor terminal, which can be provided on request), may be a conference participant terminal, such as terminal C, as shown in FIG. However, according to the participant management policy in the conference system, all the conference participant terminals 20 may be defined as the requester terminal 30 capable of receiving real-time participant monitoring service.

2 is a diagram illustrating a conference management server for providing a real-time participant monitoring service in a SIP-based multi-party conference according to the present invention.

Referring to FIG. 2, the conference management server 10 that provides conference status information to the requester terminal receives a service request message including the terminal identification information from the requester terminal, transmits a service response message, and services the terminal identification information. If the service registration management unit 110 that registers in the subscriber list, the event occurrence monitoring unit 120 that monitors whether the state information of the conference participant has changed, and the state information are changed, the changed state information to the requestor terminal registered in the service subscriber list It is configured to include the status information notification message to include the status information notification response message to receive the status information notification response message 130.

The service registration management unit 110 receives the service request message as a request message standardized in SIP, and this service request message is a term defined in the SIP standard, and a method defining a service request item may be set to SUBSCRIBE. have.

The service request message mentioned above may include a SIP URL for the requestor terminal as terminal identification information for the requestor terminal, and may further include a terminal authentication-related key value. The terminal authentication-related key value is S / MIME. It can be a key value authenticated in the Secure Multipurpose Internet Mail Extensions format.

2, when receiving a service request message including a terminal authentication related key value from a requester terminal, the conference management server 10 identifies the terminal included in the service request message based on the terminal authentication related key value. The terminal authentication manager 140 may further include determining whether to register the information in the service subscriber list. The terminal authentication manager 140 performs a terminal authentication function for providing a corresponding real-time participant monitoring service only to a specific terminal.

The terminal authentication management unit 140 performs authentication management using the public key encryption method for the terminal authentication, and the length of the corresponding key can be changed and set according to the number of service subscribers that can be supported by the participant monitoring service system.

The terminal authentication manager 140 uses a RSA (Rivest-Shamir-Adleman) public key signature method that performs encryption and authentication using a mathematical algorithm for obtaining a public key and a private key as a public key cryptography method for terminal authentication. The terminal authentication-related key value included in the service request message received from the requester terminal mentioned above may be S / MIME (Secure Services for Multipurpose Internet Mail Extension) format using a unique ID and a public key for the requestor terminal. It is made. That is, the terminal authentication management unit 140 grants access to the real-time participant monitoring service only to a specific terminal through public key authentication using the RSA.

S / MIME, mentioned above, is a secure method for sending email using the RSA encryption system, which is included in Microsoft's and Netscape's latest web browsers, and is backed by many suppliers of message-related products. RSA proposed S / MIME as a standard to the IETF.

The service registration management unit 110 may use a SIP standardized response message as a service response message, wherein a 3-digit integer result code (3) indicating whether the request message, which is a service request message, is well received, understood, and recognized Sends a response message with a status code of 1xXX and a response message with a status code of 2XX to a corresponding requester terminal.

The event occurrence monitoring manager 120 monitors whether or not the status information including one or more information in conference participant information, participation information, withdrawal information, terminal power off information, and call availability information about the conference participant terminal is changed. . When an event changed in the monitored state information occurs, the state information providing management unit 130 is to provide the changed state information to the requester terminal.

The status information providing management unit 130 uses a request message specified in SIP as the status information notification message, and sets a method for the status information notification message to NOTIFY. For reference, a method is defined in the SIP standard and is a term that defines a service request item.

The status information providing management unit 130 receives a status information notification response message using a response message standardized in SIP from the requester terminal, and the received status information notification response message includes a response message and a status code having a status code of 100 Is a 200 response message.

As described above, as described above with reference to FIG. 2, the conference management server 10 manages session setup with a conference participant terminal as a SIP UA (User Agent) for a multi-party conference of a plurality of conference participants, and sends the request to a requester terminal. It provides status information about conference participants' terminals, includes participant management policies, including policies for inviting and evicting conference participants, media policies for media and media conversions for use in conferences, and resources common to conferences. You can also manage floor policies, including policies restricting access. The function of the conference management server 10 may be performed by Focus, a central management module that manages SIP signaling with conference participants as SIP UAs and allows conference participant terminals to correctly receive media according to conference policy.

3 is a flowchart illustrating a method for providing a real-time participant monitoring service in a SIP-based multi-party conference according to the present invention.

Referring to FIG. 3, the method for providing conference status information to a requester terminal by the conference management server may include receiving a service request message including terminal identification information from the requester terminal, and transmitting a service response message to the requester terminal, and identifying the terminal. The service registration management step of registering information in the service subscriber list (S300), the event generation monitoring management step (S302) for monitoring whether or not the status information of the conference participant terminal is changed, and the requester registered in the service subscriber list A status information providing step of receiving the status information notification response message by providing the changed status information to the terminal is included in the status information notification message.

When the service request message received in the service registration management step S300 includes a terminal authentication related key value, registration of terminal identification information for the requester terminal in the service subscriber list based on the terminal authentication related key value It determines whether or not to send a service response message. That is, only the terminal identification information of the authenticated (authorized) terminal is registered in the service subscriber list using the terminal authentication related key value, thereby providing real-time participant monitoring service only to the authenticated (authorized) terminal.

5 is an exemplary diagram of a method for providing a real-time participant monitoring service in a SIP-based multi-party conference according to the present invention.

Referring to FIG. 5, a diagram for explaining a method of providing a real-time participant monitoring service in the aforementioned SIP-based multi-party conference by way of example, wherein the requester terminal R receives a real-time participant monitoring service from the conference management server F To show a series of procedures for requesting a service and receiving status information on a conference participant terminal when an event occurs. In FIG. 5, messages or information are exchanged between the conference management server F and the requester terminal R using SIP SUBSCRIBE / NOTIFY methods defined in SIP and SIP Specific Event Notification defined in RFC 2543 and RFC 3265.

Referring to FIG. 5, the requester terminal R is a conference management server F that manages a multiparty conference including one or more conference participant terminals in order to receive a real-time participant monitoring service according to the present invention. A message (service request message) is transmitted (S500). The conference management server F transmits a response message having a status code of 1XX (100) to the requester terminal R (S502) with respect to the received request message, thereby informing that the corresponding request message has been received. . Thereafter, the conference management server F transmits a response message in which a status code is set to 2XX (200) to the requester terminal R (S504), so that the corresponding request message is received and a service related to the request message. You will be informed that the request has been acknowledged successfully. Processing related to the transmission and reception of the above-described request message and response message is managed as Transaction 0.

After step S500, the conference management server F performs terminal authentication using an authentication key value (terminal authentication related information) included in a request message received from the requester terminal R and authenticated in an S / MIME format. .

Subsequently, in step S506, when the authentication is confirmed by the terminal authentication performed, the conference management server F registers the SIP URL, which is terminal identification information, in the service subscriber list, which is a list of requesters who can receive the corresponding service. Event occurrence monitoring is performed to see if the status information of the conference participant terminal is changed.

If the status information changed by the occurrence of an event for a method such as INVITE or BYE occurs by performing the event occurrence monitoring in step S506, whether to change the status information to the requestor terminal (R) registered in the service subscriber list. The request message (status information notification message) set by the NOTIFY method is transmitted (S508) and informed. Subsequently, the conference management server F receives a response message having a status code of 100 for the transmitted request message from the requester terminal R (S510) to recognize that the request message is well transmitted. do. Thereafter, the conference management server F receives a response message in which a status code is set to 200 from the requester terminal R (S512), so that the request message is transmitted and the status information related to the request message is requested. It is recognized that the terminal R has been successfully recognized. Processing related to the transmission and reception of the above-described request message and response message is managed as Transaction 1.

6 is an exemplary diagram of a terminal authentication method for restrictively providing a real-time participant monitoring service in a SIP-based multi-party conference according to the present invention, wherein terminal authentication is performed using an RSA public key signature, and an authenticated key The value is set to a constant length in the format of S / MIME.

The terminal authentication procedure to be described with reference to FIG. 6 is performed in the service registration step in the real-time participant monitoring service providing method in the SIP-based multi-party conference, and the requester terminal B is the public key pka and the requestor terminal. The unique ID Kb is encrypted in S / MIME format and included in the request message of the SUBSCRIBE method and transmitted to the conference management server A (S600). Then, the conference management server A sends the secret key ska. By decrypting the encrypted using the (S602) and transmitting a response message containing the public key (pka) (S604), authentication is made to the requester terminal (B), whereby the requester terminal (B) according to the present invention It will be possible to receive real-time participant monitoring services at the multilateral conference.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, the present invention is applied to the SIP-based multi-party conference service providing technology, by monitoring the status information of the conference participants terminal in real time only to the authorized terminal, enabling smooth progress of the multi-party conference, and enhanced security It is a very useful invention with the effect.

1 is a schematic diagram of a conference system for providing real-time participant monitoring service in a SIP-based multi-party conference according to the present invention;

2 is a diagram of a conference management server for providing a real-time participant monitoring service in a SIP-based multi-party conference according to the present invention;

3 is a flowchart illustrating a method for providing a real-time participant monitoring service in a SIP-based multi-party conference according to the present invention;

4 is an exemplary diagram for applying for real-time participant monitoring service in a SIP-based multi-party conference according to the present invention;

5 is an exemplary diagram of a method for providing a real-time participant monitoring service in a SIP-based multi-party conference according to the present invention;

6 is an exemplary diagram of a terminal authentication method for restrictively providing a real-time participant monitoring service in a SIP-based multi-party conference according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10: conference management server 20: conference participant terminal

30: requester terminal 110: service registration management unit

120: event occurrence monitoring management unit 130: status information providing management unit

140: terminal authentication management unit

Claims (13)

A conference management server that provides conference status information to a requester terminal, A service registration manager which receives a service request message including terminal identification information from a requester terminal, transmits a service response message, and registers the terminal identification information in a service subscriber list; An event occurrence monitoring manager for monitoring whether the conference participant terminal state information is changed; And When the status information is changed, the status information providing management unit receiving the status information notification response message by providing the changed status information in the status information notification message to the requester terminal registered in the service subscriber list. Conference management server providing a real-time participant monitoring service in a SIP-based multi-party conference comprising a. The method of claim 1, The service registration management unit, Receive the service request message as a request message standardized in Session Initiation Protocol (SIP), and the service request message provides a real-time participant monitoring service in a SIP-based multi-party conference, wherein a method is set to SUBSCRIBE. Conference Management Server. The method of claim 1, The service request message, And a SIP URL for the requestor terminal as the terminal identification information, and further comprising a terminal authentication related key value. The method of claim 3, wherein The terminal authentication related key value, Conference management server that provides real-time participant monitoring services in a SIP-based multiparty conference characterized in that the key value is authenticated in Secure Services for Multipurpose Internet Mail Extension (S / MIME) format. The method of claim 1, The service registration management unit, SIP-based multi-party, characterized in that a response message specified in SIP is used as the service response message, and a response message having a status code of 1XX and a response message having a status code of 2XX are transmitted to the requester terminal. Conference management server that provides real-time participant monitoring at the conference. The method of claim 1, When the service request message includes a terminal authentication related key value, A terminal authentication management unit further configured to determine whether to register the terminal identification information included in the service request message to the service subscriber list based on the terminal authentication related key value; Conference management server that provides participant monitoring services. The method of claim 6, The terminal authentication management unit, Authentication management using public key cryptography, and the length of the key can be set according to the number of service subscribers that can be supported in the participant monitoring service system. server. The method of claim 1, The event occurrence monitoring management unit, SIP for the conference participant terminal monitors whether the status information including at least one of conference participant information, participation information, withdrawal information, terminal power off information, and call availability information is changed; Conference management server that provides real-time participant monitoring services in a base multiparty conference. The method of claim 1, The state information providing management unit, And a request message specified in SIP as the status information notification message, and setting a method for the status information notification message to NOTIFY. The method of claim 1, The state information providing management unit, Receive the status information notification response message using the response message standardized in the SIP from the requester terminal, wherein the received status information notification response message is a response message with a status code of 100 and a response message with a status code of 200. Conference management server providing real-time participant monitoring service in a SIP-based multi-party conference. A method for providing conference status information to a requester terminal in a conference management server, the method comprising: (a) a service registration management step of receiving a service request message including terminal identification information from the requester terminal, transmitting a service response message to the requester terminal, and registering the terminal identification information in a service subscriber list; (b) an event occurrence monitoring management step of monitoring whether the conference participant terminal state information is changed; And (c) When the status information is changed, providing the status information notification response message by including the changed status information in the status information notification message to the requester terminal registered in the service subscriber list and receiving the status information notification response message. Real-time participant monitoring service providing method in a SIP-based multi-party conference comprising a. The method of claim 11, Step (a) is, When the received service request message includes a terminal authentication related key value, And determining a registration of the terminal identification information in the service subscriber list based on the terminal authentication related key value and transmitting a service response message. A conference system for providing conference status information to a requester terminal, Receiving a service request message including terminal identification information from the requester terminal, transmitting a service response message to the requester terminal, registering the terminal identification information in a service subscriber list, and monitoring whether or not the status information of the conference participant terminal is changed; A conference management server that receives the status information notification response message by providing the changed status information in the status information notification message to the requester terminal registered in the service subscriber list when the status information is changed; And Wired and wireless communication network for communication between the conference management server, the conference participant terminal and the requester terminal Conference system for providing a real-time participant monitoring service in a SIP-based multi-party conference comprising a.

Images