Patent ID: 8503397

Claim:
A method for mode switching of a multi-mode multi-band mobile communication terminal between an asynchronous mode and a synchronous mode in an idle state, the multi-mode multi-band mobile communication terminal including an asynchronous modem for communication with an asynchronous mobile communication network and a synchronous modem for communication with a synchronous mobile communication network, the method comprising the steps of: measuring a RSCP (Received Signal Code Power) and a RSSI (Received Signal Strength Indicator) of a received signal from the asynchronous mobile communication network; determining if the measured RSCP and RSSI of the received signal have values lower than preset threshold values; determining if a state in which the measured RSCP and RSSI of the received signal have values lower than the preset threshold values is maintained during a predetermined time interval; operating the synchronous modem when the state has been maintained during a predetermined time interval; and converting a current communication mode into a synchronous mode and then entering into a synchronous mode idle state.