METHOD FOR SESSION TRANSFER IN A CONVERGED IP MESSAGING SYSTEM

摘要

PURPOSE: A session transfer method in a converged IP messaging system is provided to supply transparent session transfer between devices using a temporary storage method. CONSTITUTION: A session to be transferred is selected from a list of device A-2 and device A-1(325). Device A-2 requests session transfer to a call server. The call server receives the session transfer request. The call server performs a temporary storing operation(330). The call server generates a separate session with which a session history and temporary storage data necessary for session transfer are transferred to device A-2(335).