SYSTEM AND METHOD FOR CONTINUING VOICE CALL IN WIRELESS COMMUNICATION SYSTEM

PURPOSE: A voice call service device of a mobile communication system and a method thereof are provided to prevent disconnection of a voice call when an SRVCC(Single Radio Voice Call Continuity) source RAT and a destination RAT are not supported in UE(User Equipment). CONSTITUTION: When an SRVCC sou...

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Main Authors CHO, SONG YEAN, JEONG, SANG SOO, ERIK GUTTMAN, LIM, HAN NA
Format Patent
LanguageEnglish
Korean
Published 08.05.2013
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
WIRELESS COMMUNICATIONS NETWORKS
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Summary:PURPOSE: A voice call service device of a mobile communication system and a method thereof are provided to prevent disconnection of a voice call when an SRVCC(Single Radio Voice Call Continuity) source RAT and a destination RAT are not supported in UE(User Equipment). CONSTITUTION: When an SRVCC source RAT and a target RAT are not supported in UE, E-UTRAN/UTRAN/GERAN transmits an Attach/TAU/RAU accept including IMSVoPS indicator=1 to the UE(235). When the SRVCC source RAT and the target RAT are not supported in the UE, the E-UTRAN/UTRAN/GERAN transmits the Attach/TAU/RAU accept including the IMSVoPS indicator=1 to the UE(227). The UE receives the Attach/TAU/RAU accept. When an IMSVoPS indicator value is 1, the E-UTRAN uses an IMS(Internet Protocol Multimedia Subsystem) voice call.
Bibliography:Application Number: KR20110111164