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http://dx.doi.org/10.7236/JIWIT.2011.11.6.081

TCP Performance Improvement in Network Coding over Multipath Environments  

Lim, Chan-Sook (홍익대학교 컴퓨터정보통신공학과)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.11, no.6, 2011 , pp. 81-86 More about this Journal
Abstract
In one of the most impacting schemes proposed to address the TCP throughput problem over network coding, the network coding layer sends an acknowledgement if an innovative linear combination is received, even when a new packet is not decoded. Although this scheme is very effective, its implementation requires a limit on the coding window size. This limitation causes low TCP throughput in the presence of packet reordering. We argue that a TCP variant detecting a packet loss relying only on timers is effective in dealing with the packet reordering problem in network coding environments as well. Also we propose a new network coding layer to support such a TCP variant. Simulation results for a 2-path environment show that our proposed scheme improves TCP throughput by 19%.
Keywords
Network Coding; TCP; ARQ; Packet Reordering;
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