Group management method and system in interworking system of IMPS system and simple IM system

A method for communicating in an interworking system by a Session Initiation Protocol for Instant Messaging and Presence Leveraging Extensions Instant Messaging (SIMPLE IM) system, the method comprising the steps of:

• receiving a first request for retrieval of group properties of a group included in an Instant Messaging and Presence Service (IMPS) system from a client;
• forwarding the first request for the retrieval of the group properties to an Inter Working Function (IWF);
• receiving a first response, wherein the first response, received from the IMPS system, corresponding to the first request is converted into a protocol format supported by the SIMPLE IM system;
• receiving a second request for setting of a group included in the IMPS system;
• and
• forwarding a second response to the client,
• wherein the group properties of the group are group properties of the group changed according to setting of the group properties of the group if the second request includes a request for the setting of the group properties of the group.

A group management method for group communication by Inter Working Function (IWF), the group management method comprising the steps of:

• receiving a first request, from a first system of an Instant Messaging and Presence service (IMPS) system and a Session Initiation Protocol for Instant Messaging and Presence Leveraging Extensions Instant Messaging (SIMPLE IM) system, for retrieval of group properties of a group included in a second system;
• converting the first request into a protocol format supported by the second system;
• receiving a second request, from the first system, for setting of a group included in the second system;
• and
• forwarding the first request to the second system,
• wherein the group properties of the group are group properties of the group changed according to the setting of the group properties of the group if the second request includes a request for the setting of the group properties of the group.