Throughput of a network shared by TCP Reno and TCP vegas in static multi-hop wireless network

Abstract

Previous study has shown the superiority of TCP Vegas over TCP Reno in wired and wireless network. However, when both Reno and Vegas co-exist on a wired link, protocol Vegas dominated by Reno due to its conservative nature. However, previous study does not include all the issues which might be arising during communication in the network. This paper finds the performance (throughput and fairness) of a network shared by Reno and Vegas in static multi hop wireless ad hoc network focusing on four issues. Here we introduced a new parameter called PST (Percentage Share of Throughput) which measures fairness among different connections shared by a common link. The issues are: (1) Both Reno and Vegas flows in forward direction, (2) Reno flows in forward and Vegas flows in reverse direction, (3) Both Reno and Vegas flows in forward direction along with bursty UDP traffic in background, (4) Both Reno and Vegas flows in forward direction where receiver is enabled with delayed acknowledgement (DelAck) schemes. Our result shows that Reno and Vegas are more compatible (or fairer) when DSDV protocol is used and their PST is much closer to each other (around 50 %). For increased hop length, DSDV is better routing protocol for all issues we have considered. However, use of DelAck techniques improves the throughput than others.