ComboCoding: Combined Intra/Inter-Flow Network Coding for TCP over Multihop Lossy Wireless Networks
نویسندگان
چکیده
TCP over wireless networks is challenging due to high random losses and data-ACK interference. To address both problems, a new hybrid network coding scheme, ComboCoding, is proposed. ComboCoding combines intra-flow and inter-flow coding to provide robust communications over TCP in disruptive wireless networks. Intra-flow coding mitigates losses by using a modified random linear coding scheme that introduces adaptive redundant transmissions. The channel efficiency is enhanced by introducing also inter-flow coding, which performs opportunistic XOR of TCP data and ACK flows. Simulation results show that under high loss scenarios, ComboCoding delivers the highest throughput and achieves acceptable overhead. ComboCoding also features a novel adaptive redundancy control algorithm that adapts to unstable lossy links. Keywords-Network Coding, Random Linear Coding, XOR Coding, TCP, Wireless Multihop, Lossy Channels
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تاریخ انتشار 2010