| 摘要 |
<p>Embodiments of the present invention relate to a method and an apparatus for retransmitting a data packet. The method for retransmitting a data packet includes that: a transmitter transmits a data packet; when the transmitter determines that transmission of the data packet is completed, and there is no data packet to be transmitted or a transmitting window is unable to transmit a data packet to be transmitted, the transmitter instructs a media access control entity to feed back whether the transmission of the data packet fails through a local negative acknowledgement mode; and if the transmitter receives that the media access control entity feeds back that the transmission of the data packet fails through the local negative acknowledgement mode, the transmitter retransmits the data packet. According to the method and apparatus for retransmitting a data packet provided in embodiments of the present invention, when the transmission of the data packet is completed, and there is no data packet to be transmitted or the transmitting window is unable to transmit a data packet to be transmitted, the local negative acknowledgement mode is applied to the data packet, thereby not only avoiding transmission delay of the data packet, but also avoiding the repeatedly retransmitting the data packet.</p> |
