Volunteer Domain Change of Existed Service for Supporting Multiple Services with Service Continuity

摘要

A method of performing volunteer domain-change to support multiple services with service continuity in a heterogeneous network is proposed. A user equipment (UE) establishes a first connection for transmitting and receiving voice or data in a first service domain in a heterogeneous network. The UE is equipped with one or multiple radio frequency (RF) transceivers. The UE triggers a volunteer domain-change of the first connection from the first service domain to a second service domain based on a detected condition. The detected condition indicates that a second connection is not supported in the first service domain, establishing the second connection failed in the first service domain, or establishing the second connection is predicted to fail in the first service domain. The UE then establishes the second connection for transmitting and receiving voice or data in the second service domain while simultaneously continuing the first connection without service interruption.