METHOD AND SYSTEM FOR RECOGNIZING CALL SWITCH-OVER FROM 1XEV-DO SYSTEM TO 1X SYSTEM
摘要
The system in accordance with the present invention recognizes in real time that a call connection of a hybrid access terminal be switched over to a 1X system, by sending an inquiry message inquiring the hybrid access terminal of whether the hybrid access terminal has receiveda voice signal or a low-rate data signal and by receiving a confirmation message that the hybrid access terminal has received the voice signal or the low-rate data signal from a mobile switching center, if a low-level signal below a prescribed level is received from the hybrid access terminal while counting time initiated from a point of a call drop while the hybrid access terminal is being provided with a multimedia service.
申请公布号
WO2004059887(A1)
申请公布日期
2004.07.15
申请号
WO2003KR02722
申请日期
2003.12.12
申请人
SK TELECOM CO., LTD.;LEE, JAEMOON;CHOI, JINTAE;KIM, BEYONGSU;KIM, NAMGYU