Patent ID: 9037075
Filing Date: 2015-05-19
Classification: H04B

Abstract:
1. A relay station relaying wireless signals between a base station and a mobile station, the relay station comprising: circuitry configured to relay the wireless signals, determine whether or not it is necessary to change a cell ID in order to avoid a collision between a cell ID of the relay station and a cell ID of the base station due to a movement of the relay station, and cause a cell ID of an access point of the mobile station belonging to the relay station to be changed from a first cell ID to a second cell ID when the circuitry determines that it is necessary to change the cell ID, wherein the circuitry determines whether or not it is necessary to change the cell ID by monitoring a correlation between synchronization sequences and one or more cell IDs in the wireless signals received from nearby base stations, and determines that it is necessary to change the first cell ID that is a cell ID being used to the second cell ID that is a cell ID of which a correlation value reaches a maximum after a predetermined time has elapsed from a point of time at which the correlation value in the synchronization sequence of any of the cell IDs reaches the maximum.