| 摘要 |
A base station notifies a mobile station of transmission power information regarding an uplink wireless channel, e.g. a random access channel (RACH), and the mobile station transmits to the base station transmission delay estimation information regarding the RACH over the RACH at a transmission power set based on the transmission power information. The base station changes the transmission power information regarding the RACH according to the transmission delay estimation information and notifies the mobile station of the changed transmission power information. Preferably, the mobile station retransmits data or a preamble if the mobile station does not receive, over a downlink control channel, a notification that the base station has received the data or the preamble correctly after a predetermined time. The base station may transmit the transmission power information over a BCH and a CPICH transmitted to a plurality of mobile stations. |
