Delaying the changeover of a channel during handover in a mobile communication system

摘要

A wireless base station (6) of a mobile wireless communication system employing an adaptive modulation control, the wireless base station being operable to transmit a third datum to a mobile station in response to a channel quality information (CQI) received from the mobile station in response to the transmission of a pilot signal, wherein said wireless base station is operable to transmit said third datum via a third communication channel (HS-SCCH;HS-PDSCH) and wherein said third datum comprises modulated communication data, modulated in accordance with a modulation scheme, and/or modulation information about said modulation scheme, characterized in that the wireless base station comprises:an acquisition unit (23) which, at the time of handover from a source wireless base station to said wireless base station, is operable to acquire from a forwarding unit (24) of the source wireless base station, the channel quality information (CQI) transmitted by the mobile station in response to a pilot signal already transmitted by said wireless base station prior to changeover of the third communication channel; anda control unit (18) which is operable to transmit modulation information or communication data to the mobile station in accordance with the channel quality indicator acquired by the acquisition unit.