Patent ID: 8045989
Filing Date: 2011-10-25
Classification: H04W

Abstract:
1. A method for reducing a frequency of measurements for cell reselection in a mobile communication terminal, comprising the steps of: measuring a signal receive level (“Srxlev”) and a signal quality (“Squal”) of a serving cell in an idle state; when a serving-cell selection condition is not satisfied or an adjacent-cell measurement condition is satisfied as a result of the measurement, examining whether a number of times of cell reselections reaches a critical value; when the number of times of cell reselections reaches the critical value, initializing the number of times of cell reselection using a value smaller than the critical value and returning to an idle state; when the number of times of cell reselections does not reach the critical value, performing an adjacent-cell measurement for the cell reselection; determining a ranking of adjacent cells using a result of the adjacent-cell measurement and determining whether an adjacent cell of a highest ranking is superior to the serving cell; performing reselection of a corresponding cell and returning to the idle state when the adjacent cell of the highest ranking is the cell superior to the serving cell; determining that cell reselection has failed and examining whether the cell reselection failure is a successive failure when the adjacent cell of the highest ranking is not the cell superior to the serving cell; when the cell reselection failure is the successive failure, replacing the number of times of cell reselection by a value obtained by adding 1 to the number of cell reselection, and returning to the idle state; and when the cell reselection failure is not the successive failure, initializing the number of cell reselection to 0, and returning to the idle state.