Patent ID: 7403789
Filing Date: 2008-07-22
Classification: H04B,H04W,Y02D

Abstract:
1. A mobile communication system comprising: a base station; and a mobile station which performs data transmission/reception with said base station using a wireless link set between them, wherein said base station comprises: means for transmitting a downlink individual channel to the mobile station; means for starting synchronization establishment operation of an uplink individual channel in response to transmission of the uplink individual channel from the mobile station to the base station; and means for performing transmission/reception of data to be transmitted in the case where the synchronization between the uplink individual channel and downlink individual channel has been established at a third timing of a specified cycle previously set and the data to be transmitted between the base station and the mobile station exists, wherein said mobile station comprises: means for starting synchronization establishment operation of the downlink individual channel at a second timing of a specified cycle previously set; means for starting transmission of the uplink individual channel to the base station at the time when the synchronization of the downlink has been established; means for performing transmission/reception of data to be transmitted in the case where the synchronization between the uplink individual channel and downlink individual channel has been established at the third timing of a specified cycle previously set and the data to be transmitted, between the base station and the mobile station, exists; and means for suspending at least one of the transmission of the uplink individual channel or reception of the downlink individual channel in the case where the synchronization between the uplink individual channel and downlink individual channel has been established at the third timing and the data to be transmitted, between the base station and the mobile station, does not exist, and wherein when the synchronization of the uplink individual channel or the downlink individual channel has not been established at the third timing, the synchronization establishment operation is continued.