A cross-layer design for improving TCP performance in opportunistic network
Yun Li · Caai Transactions on Intelligent Systems · 2011
In opportunistic networks,the infectivity of epidemic routing and intermittent connectivity of network would degrade the performance of TCP when TCP works with epidemic routing.In order to improve the performance of TCP in opportunistic networks,a cross-layer design,named ACK-EPI,which is based on epidemic routing and TCP/Reno,is proposed.The algorithm renews the threshold of slow-star at the beginning of TCP connection to prevent the network from incorrectly turning into congestion avoidance phase so that the network can keep the regular increment speed of congestion window.At the same time,to avoid the packets that have already been delivered being forwarded again in the network,the design makes use of ACK to delete the redundant packets.The stimulation results show that the proposed algorithm can ultimately increase TCP performance in opportunistic networks.