TERMINAL UNIT FOR HANDLING SESSION ON THE BASIS OF SESSION INITIATION PROTOCOL, METHOD OF TRANSMITTING AND RECEIVING THEREOF

摘要

According to the present invention, a service is configured by a plurality of sessions and respective session negotiation requests defined by different media formats can be performed without influencing existing connected sessions, and hence it is easy to add, delete, and change the media, the contact of session negotiation can be specified, and the response to the session negotiation request can be processed easily with the service acceptance or rejection of the contact.