Improving TCP Performance in Multi-Hop Coded Wireless Networks

Abstract

Wireless Multi-Hop networks often rely on the use of the Transport Control Protocol (TCP) which provides high reliability and throughput performance at Transport Layer. Xor network coding does not benefit greatly from TCP's attributes. TCP takes into consideration the nature of networks; however, TCP does not acknowledge the network coding which can ease congestion by performing coding at intermediates nodes as in COPE. Meanwhile, the perspective of network coding has a more rigid approach that depends on relay nodes to perform coding rather than depending on the sender and the receiver exchange messages. In this paper, we investigate the different perspective to bridge the gap, as our understating is moved from throughput to Ratio of Loss Packet (RLP), delay and jitters. So we propose WeNC-TCP to appreciate the network coding nature functionality and incorporate better interaction between TCP at Transport layer, and network coding functionality which relies on between network and Data link layer, as a result, the average ratio of loss packets has improved up to 72%, and end-to-end Delays have reduced to up to 48%.