Patent ID: 6993294
Filing Date: 2006-01-31
Classification: H04L,H04W,Y02D

Abstract:
1. A mobile communication system comprising: a base station; and a mobile station, said base station transmitting a downlink signal using a downlink shared channel; said mobile station setting an uplink control channel with said base station in response to verifying a packet data demand having been newly made by the mobile station, measuring a reception quality of said downlink signal, transmitting a quality information depending upon said reception quality using said uplink control channel, said base station performing transmission control of data to said mobile station using said quality information, said base station including means for transmitting data transmission notice to said mobile station by setting a downlink control channel with said mobile station, and said mobile station including means for starting transmission of said quality information to said base station at a given interval in response to said data transmission notice while said uplink control channel is set, wherein, said mobile station stops transmission of said quality information and releases said uplink control channel upon said data transmission notice no longer being received by said mobile station.