| 摘要 |
<p>Disclosed in an embodiment of the present invention are a wireless side TCP data retransmission method and device, comprising: by applying the technical solution in the embodiment of the present invention, when a TCP entity receives an uplink message transmitted by a terminal device and containing a Dup ACK message, and if the TCP entity determines that an RLC layer has transmitted to the terminal device all the fragment packets of a data packet corresponding to the Dup ACK message and has received an ACK message returned by the terminal device, then counting and accumulating the Dup ACK messages; and when the count value reaches 2, retransmitting the data packet corresponding to the Dup ACK message, so as to screen the Dup ACK of the terminal device by flexibly utilizing the local data buffering and retransmission characteristics of the TCP entity and in combination with the reliable transmission characteristic of the RLC, and quickly retransmit the TCP layer data, so that the wireless side as an agency on the TCP can accurately determine whether the data packet requires the retransmission of the TCP layer, thus improving TCP performance and air interface resource utilization rate, and avoiding wasting system resources caused by unnecessary data retransmission.</p> |
