Browse Prior Art Database

Presence-based Conference

IP.com Disclosure Number: IPCOM000125657D
Original Publication Date: 2005-Jul-10
Included in the Prior Art Database: 2005-Jul-10
Document File: 2 page(s) / 566K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

The supplementary service Conference call allows a subscriber to hold a conference call with several participants. To initiate a conference, the user has to call all participants one after another. This is time-consuming and not particularly user-friendly, especially when the number of participants is relatively large. In addition, the Conference Supplementary Service does not cover urgent situations when a telephone conference has to be established without prior notification of the participants. It is proposed to use Presence-based technologies in Conference supplementary service. The user initiating the conference enters his request for the establishment of the conference by specifying the required participants and possibly the means of communication (e.g. voice call, multimedia session, etc). The request is sent via SCI or better via web-based SCI. The presence status of the required participants is monitored by a presence management system (or presence agent) in the network (Fig. 1). When, after some time, all requested participants are available, a call (controlled by the Call Feature Server (CFS) or Call Session Control Function (CSCF) in an IMS-enabled network) is launched to each participant, and the calls are bridged together (Fig. 2). Each participant is informed by a notification that the answer to the call will lead to a participation in a conference. In addition, the notification contains the (identification number) of the conference initiator (Fig. 3).

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Presence-based Conference

Idea: Dimitris Papadimitriou, GR-Athens

The supplementary service Conference call allows a subscriber to hold a conference call with several participants. To initiate a conference, the user has to call all participants one after another. This is time-consuming and not particularly user-friendly, especially when the number of participants is relatively large. In addition, the Conference Supplementary Service does not cover urgent situations when a telephone conference has to be established without prior notification of the participants.

It is proposed to use Presence-based technologies in Conference supplementary service. The user initiating the conference enters his request for the establishment of the conference by specifying the required participants and possibly the means of communication (e.g. voice call, multimedia session, etc). The request is sent via SCI or better via web-based SCI. The presence status of the required participants is monitored by a presence management system (or presence agent) in the network (Fig.
1). When, after some time, all requested participants are available, a call (controlled by the Call Feature Server (CFS) or Call Session Control Function (CSCF) in an IMS-enabled network) is launched to each participant, and the calls are bridged together (Fig. 2). Each participant is informed by a notification that the answer to the call will lead to a participation in a conference. In addition, the notification contains the (identification number) of the conference initiator (Fig. 3).

After successful invocation of the Conference Supplementary Service, the previously known operations are possible: Disconnect Remote Party, Isolate Remote Party, Reattach Remote Party, Split Remote Party.

An application of the proposed solution is described in the following.

In an urgent situation, due to customer complaints, a telephone conference has to be established between the experts in a company, which is located in different places. The conference initiator activates the Presence-based Conference service as described above, specifying that besides the voice call, a NetMeeting session has to take place. When all requested participants are available at their desks (meaning that voice call and NetMeeting session are possible), the conference is set up automatically under control of the CFS at the network of the initiator. A notification is sent to all users informing them that the call concerns a conference and at the same time a NetMeeting session is established. A subscriber who answers the voice call becomes immediately part of the conference. After the last subscriber has answered, the conference may start.

Figure 1: Conference initiator posts his requests via http

SIP Clients

SIP Phones

CFS

CFS

Application Server

Application Server

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