THIRD-PARTY SESSION MODIFICATION
The present invention relates to a method, system, client device, conference server device and computer program product of controlling media composition in a multi-party conversation involving a central control point ( 50 ). At a participant ( 10 ) of said multi-party conversation, a scope information (SoM) which specifies members of said multi-party conversation is selected and added to a session modifying request. The session modifying request is transmitted to the central control point ( 50 ) which initiates a media modification at the specified members in response to the scope information (SoM). Thereby, a client can control whether media modification is applied to the whole conference, selected participants or only between the client itself and the conference server.
1 . A method comprising:
receiving scope information at a client device participating in a multi-party conversation session, wherein the scope information identifies one or more parties participating in the multi-party conversation session for whom a modification of a media type is to be applied;
generating, by the client device, a session modifying request based on the scope information; and
determining, by the client device, to transmit the session modifying request from the client device to a central control point to apply the modification of the media type identified by the scope information.
2 . The method of claim 1 , wherein the scope information is a header parameter or an attribute of the session modifying request.
3 . The method of claim 1 , wherein the media type comprises push to talk over cellular (PoC) audio, instant messaging, full-duplex audio, full-duplex video, or some combination thereof.
4 . The method of claim 1 , wherein the scope information is specified within the session modifying request as a session description protocol (SDP) attribute.
5 . The method of claim 1 , wherein the scope information is specified within the session modifying request as an a-line value.
6 . The method of claim 1 , wherein the modification of the media type is applied only between the client device and the central control point without affecting other parties of the multi-party conversation session.
7 . The method of claim 1 , comprising adding a list of addresses of all parties to whom the modification of the media type is to be applied.
8 . The method of claim 7 , wherein the list of addresses includes a session initiation protocol (SIP) uniform resource indicator (URI) list.
9 . The method of claim 7 , wherein the list of addresses includes at least one uniform resource indicator (URI) of the session initiation protocol (SIP).
10 . The method of claim 1 , wherein the session modifying request is a re-INVITE request of a session initiation protocol (SIP).
11 . The method of claim 1 , wherein the session modifying request identifies a recipient to contact a third party using the scope information.
12 . The method of claim 11 , wherein the session modifying request includes a header parameter used to inform the central control point that an existing dialog is to be modified, instead of creating a new dialog.
13 . The method of claim 12 , wherein the session modifying request includes a callee capability information which indicates in which way the existing dialog is to be modified.
14 . The method of claim 11 , wherein the scope information is added as an address list.
15 . The method of claim 14 , wherein the address list comprises at least one uniform resource indicator (URI) of a session initiation protocol (SIP).
16 . An apparatus comprising:
at least one processor; and
at least one memory including computer program code;
wherein the at least one memory and the computer program code are configured to, with the at least one processor, direct the apparatus to perform at least the following:
receive scope information at the apparatus while the apparatus is participating in a multi-party conversation session, wherein the scope information identifies one or more parties participating in the multi-party conversation session for whom a modification of a media type is to be applied;
generate a session modifying request based on the scope information; and
determine to transmit the session modifying request from the apparatus to a central control point to apply the modification of the media type identified by the scope information.
17 . The apparatus of claim 16 , wherein the scope information is a header parameter or a message attribute of the session modifying request.
18 . The apparatus of claim 17 , wherein the message attribute is a session initiation protocol (SIP) attribute, and the scope information is added as an a-line value.
19 . A tangible non-transitory computer-readable storage medium carrying one or more sequences of one or more instructions, which when executed by one or more processors, direct an apparatus to:
receive scope information corresponding to a multi-party conversation session, wherein the scope information identifies one or more parties participating in the multi-party conversation session for whom a modification of a media type is to be applied;
generate a session modifying request based on the scope information; and
determine to transmit the session modifying request to a central control point to apply the modification of the media type identified by the scope information.
20 . The computer-readable storage medium of claim 19 , wherein the apparatus is directed to provide a user agent for a client device.