Patent ID: 8724589
Filing Date: 2014-05-13
Classification: H04B,H04W

Abstract:
1. A wireless communication system comprising: a first wireless base station; a second wireless base station connected to the first wireless base station via a wired transmission path; and a relay station connected wirelessly to the first wireless base station to perform relayed communication via the first wireless base station, wherein, when a mobile station at a lower level than the relay station executes a handover to the second wireless base station, the first wireless base station switches a data transfer route by redirecting data which is not yet completely transmitted to the mobile station and transmits the data to the second wireless base station by wired communication, so as to be forwarded to the second wireless base station to which the mobile station is handed over; wherein: after the relay station instructs the mobile station to execute the handover to the second wireless base station, the relay station and the first wireless base station perform handover signaling communication with each other, the handover signaling communication being signaling communication for executing a handover from the relay station to the first wireless base station, and the first wireless base station switches the data transfer route after completion of the handover signaling communication; and wherein the handover signaling communication between the relay station and the first wireless base station is performed, and as a result, two handovers, one from the relay station to the first wireless base station and the other from the first wireless base station to the second wireless base station, are executed, thereby accomplishing the handover from the relay station to the second wireless base station, and wherein the first wireless base station switches the data transfer route upon detecting handover-related signaling which is communicated between the relay station and the second wireless base station when the handover is executed at the relay station.