| 摘要 |
<p>Communication systems are provided to maintain sync(time and frequency) with a BS(Base Station) or the other RS(Relay Station) when an RS can not receive identification and training information generated for a use by an MS(Mobile Station), and enable the RS to use sequences for updating the estimation of the RS for channel state information. A transmission method for a multi-hop radio communication system comprises the following steps of: transmitting a preamble in a first transmission window of a transmission section when a message having the preamble is transmitted in a specific transmission section; and transmitting transmission introduction sequences or one of the transmission introduction sequences as control information used by at least one intermediate apparatus in a second transmission window of the transmission section except the first transmission window.</p> |
