A communication apparatus is provided. A processor receives a measurement control message carrying information about a filtering coefficient via a radio transceiver module, periodically measures signal quality of at least one cell to obtain a plurality of measurement results, periodically filters the measurement results according to a first measurement period to obtain a plurality of filtered results, and determines whether to transmit a measurement report to a system controller in the wireless communication network according to the filtered results. The filtering coefficient is assigned by the system controller to filter the measurement results according to a second measurement period. The second measurement period is longer than the first measurement period