Delay determinacy message retransmission method with local cache

The invention provides a delay determinacy message retransmission method with a local cache. A receiving end requests data which needs retransmitted from a sending end unequivocally, and information of more than one lost data section is included in a request. The local cache is arranged, lost messages can be subjected to local retransmission, and accordingly the phenomenon of packet loss of a reverse link ACK can be avoided. The method is a strategy through which loss restoring is carried out quickly with limited bandwidth, on a channel with large delay and error rate and asymmetric link bandwidth, the frequency and the amount of message retransmission are reduced, and the problem of channel efficiency lowering during packet loss caused by reverse channel bandwidth limiting on the channel is avoided. By arranging the local cache, the problem that channel transmission efficiency is low due to large delay when reverse ACK messages are lost can be solved. According to the method, satellite link message retransmission efficiency can be greatly improved, and satellite channel using rate is greatly improved.