发明授权
US07609675B2 Method and system for recognizing call switch-over from 1xEV-DO system to 1X system
失效
从1xEV-DO系统到1X系统识别呼叫切换的方法和系统
- 专利标题： Method and system for recognizing call switch-over from 1xEV-DO system to 1X system
- 专利标题（中）： 从1xEV-DO系统到1X系统识别呼叫切换的方法和系统
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申请号： US10541241申请日： 2003-12-12
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公开(公告)号： US07609675B2公开(公告)日： 2009-10-27
- 发明人: Jaemoon Lee , Jintae Choi , Beyongsu Kim , Namgyu Kim
- 申请人： Jaemoon Lee , Jintae Choi , Beyongsu Kim , Namgyu Kim
- 申请人地址： KR Seoul
- 专利权人： SK Telecom Co., Ltd.
- 当前专利权人： SK Telecom Co., Ltd.
- 当前专利权人地址： KR Seoul
- 代理机构： Lowe Hauptman Ham & Berner, LLP
- 优先权： KR10-2002-0087438 20021230; KR10-2003-0053895 20030804
- 国际申请： PCT/KR03/02722 WO 20031212
- 国际公布： WO2004/059887 WO 20040715
- 主分类号： H04B7/212
- IPC分类号： H04B7/212
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 received 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.
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