Patent ID: 8355724

Claim:
A handover control method by which a radio base station performs a handover control on a mobile station on a basis of a measurement report transmitted from the mobile station, the method comprising the steps of: measuring radio qualities in a plurality of different frequency cells by the mobile station in a predetermined measurement period; when the mobile station determines that a radio quality in a specific frequency cell satisfies a reporting criterion, activating a timer for the specific frequency cell by the mobile station, the timer for the specific frequency cell being configured to measure a period during which the radio quality in the specific frequency cell continues to satisfy the reporting criterion; and when the timer for the specific frequency cell expires, transmitting the measurement report to the radio base station by the mobile station, the measurement report including the radio quality in the specific frequency cell, wherein when a timer for a first frequency cell having a higher priority than a second frequency cell is active, the mobile station does not transmit the measurement report including a radio quality in the second frequency cell to the radio base station even if a timer for the second frequency cell expires.