Invention Grant
US07706331B2 Method for performing a handover from a WCDMA system to a CDMA system in a multi-mode mobile communication terminal
有权
用于在多模式移动通信终端中执行从WCDMA系统到CDMA系统的切换的方法
- Patent Title: Method for performing a handover from a WCDMA system to a CDMA system in a multi-mode mobile communication terminal
- Patent Title (中): 用于在多模式移动通信终端中执行从WCDMA系统到CDMA系统的切换的方法
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Application No.: US10983986Application Date: 2004-11-08
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Publication No.: US07706331B2Publication Date: 2010-04-27
- Inventor: Woo-Sic Han , Jae-Hoon Kim
- Applicant: Woo-Sic Han , Jae-Hoon Kim
- Applicant Address: KR Seoul
- Assignee: SKY Teletech Co., Ltd.
- Current Assignee: SKY Teletech Co., Ltd.
- Current Assignee Address: KR Seoul
- Agency: H.C. Park & Associates, PLC
- Priority: KR10-2003-0079310 20031111; KR10-2003-0082925 20031121; KR10-2004-0066436 20040823
- Main IPC: H04B7/216
- IPC: H04B7/216

Abstract:
A method of performing a handover from a Wideband Code Division Multiple Access (WCDMA) system to a Code Division Multiple Access (CDMA) system in a multi-mode terminal having a WCDMA module and a CDMA module is disclosed. The method includes determining whether a handover to the CDMA system is necessary during a call through a WCDMA system; acquiring a pilot signal from the CDMA system by activating the CDMA module if it is determined that the handover to the CDMA system is necessary; receiving a sync signal if the pilot signal from the CDMA system is acquired; transmitting information for handover to the WCDMA system through the WCDMA module; allowing the CDMA module to enter a CDMA traffic state using handover information if the handover information is received from the WCDMA system through WCDMA module; and releasing a traffic state of WCDMA module.
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