Patent ID: 7447256
Filing Date: 2008-11-04
Classification: H04B,H04W,Y02D

Abstract:
1. A method of communication in a mobile communication terminal, comprising the steps of: receiving, by a receiver, a spread spectrum signal transmitted by a base station; generating a dispreading code for de-spreading the received spread spectrum signal and demodulating the spread spectrum signal using the generated dispreading code; outputting, by a first oscillator, a signal having a first frequency; executing, by a first timer, a counting operation when the receiver is in a suspension state, the first timer being driven by the first oscillator; starting to output, by a second oscillator, a signal having a second frequency when said mobile communication terminal changes from the suspension state to a receiving state during which said receiving step is performed, wherein the second frequency is higher than the first frequency; executing, by a second timer, a counting operation when the receiver is in the receiving state, the second timer being driven by the second oscillator; controlling the receiving state and the suspension state based on the count by the first timer and the second timer; controlling so that said mobile communication terminal changes from the suspension state to the receiving state and the demodulating step is started; and controlling to execute a search operation to attain synchronization of a dispreading code if an output of a signal demodulated by the demodulating step is smaller than a predetermined value, and to not execute the search operation to attain synchronization of the dispreading code if the output of the signal is equal to or larger than the predetermined value, when said mobile communication terminal changes from the suspension state to the receiving state.