METHOD AND APPARATUS FOR HANDLING SINGLE RADIO VOICE CALL CONTINUITY (SRVCC) IN INTER RADIO ACCESS TECHNOLOGY (RAT) HANDOVER

摘要

PPROBLEM TO BE SOLVED: To accomplish a system and method for determining whether an inter radio access technology (inter-RAT) handover is an SRVCC handover. PSOLUTION: A system and a method for determining whether an inter-RAT handover is an SRVCC handover and for performing the subsequent SRVCC handover are provided. The system and the method include receiving a handover command message that does not include SRVCC related information elements, for example, "RAB info to replace", but continuing with an SRVCC handover using a circuit-switched RAB provided in "information for setup". The system and method also include receiving a handover command message that includes SRVCC related information elements and performing the SRVCC handover by an alternative method. PCOPYRIGHT: (C)2011,JPO&INPIT