| 摘要 |
<p>A downlink retransmission method based on the wireless communication TDD system is provided, and the method includes that: the mapping relation between the downlink physical frames and the uplink physical frames is preestablished, and each downlink physical frame has the corresponding uplink physical frame, and each uplink physical frame corresponds to one or two continuous downlink physical frames, and each uplink physical frame corresponds to different downlink physical frame (S102); the base station transmits one or several data sub packets to one or several terminals by using the downlink physical frame of the downlink transmission block(S104); the terminal demodulates the data sub packet of the downlink physical frame received (S106); based on the result of demodulation and the mapping relation, the terminal transmits the answer message showing whether the data sub packet is successfully demodulated, or the terminal transmits the answer message only when successfully demodulated (S108); for the data sub packet which the terminal unsuccessfully demodulates, the base station transmits the retransmitting data sub packet of the data sub packet unsuccessfully demodulated in the corresponding downlink physical frame of the next downlink transmission block (S110). An uplink retransmission method based on the wireless communication TDD system is also provided.</p> |
