| 摘要 |
When a mobile station (200) is out of uplink synchronization, an efficient procedure is realized no matter whether a dedicated signature can be allocated. In a mobile communication system in which a base station (100) transmits a DL-SCH to a mobile station (200), when the mobile station (200) is out of uplink synchronization and detects resource allocation, the mobile station (200) performs a random access to the base station (100). When the base station (100) detects a signature by using a random access channel, it transmits a preamble response to the mobile station (200). When the mobile station (200) receives the preamble response, it transmits message (3) to the base station (100). |
