Abstract: A wireless communication method and device are provided. The wireless communication method includes the steps of receiving a plurality of measurement results; determining whether a cell-change event is triggered according to the measurement results; calculating a reverse-direction criterion to determine whether a ping-pong effect will occur when the cell-change event is triggered; and terminating the cell-change event when the ping-pong effect will occur.

Abstract: A cell reselection method and system using an active measurement set in a mobile communication, which determines whether the user equipment enters in a power-saving mode based on the signal strength and strength variability of a serving cell and the mobile feature of a user equipment. In the power-saving mode, in accordance with the signal strength of neighboring cells on the serving cell, an active measurement set is formed with cells that are selected from the neighboring cells broadcasted by a WCDMA system and have stronger signals. The user equipment only requires measuring the cells in the active measurement set. Thus, since the cell number of the active measurement set is smaller than that defined by the WCDMA system, the number of neighboring cells required to be measured is reduced, so as to reduce the power dissipation and increase the idle time on the user equipment.