Patent ID: 7706331
Filing Date: 2010-04-27
Classification: H04W

Abstract:
1. 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 mobile terminal having a WCDMA module and a CDMA module, comprising the steps of: (a) determining whether the handover to the CDMA system is necessary during a call through the WCDMA module; (b) 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; (c) receiving a sync signal if the pilot signal from the CDMA system is acquired; (d) transmitting information for the handover to the WCDMA system through the WCDMA module; (e) allowing the CDMA module to enter into a CDMA traffic state using handover information received from the WCDMA system through the WCDMA module; and (f) releasing a traffic state of the WCDMA module, wherein the steps are performed at the multi-mode mobile terminal.