Abstract
Researchers have used extensive simulation and experimental studies to understand TCP performance in wireless multihop networks. In contrast, the objective of this paper is to theoretically analyze TCP performance in this environment. By examining the case of running one TCP session over a string topology, a system model for analyzing TCP performance in multihop wireless networks is proposed, which considers packet buffering, contention of nodes for access to the wireless channel, and spatial reuse of the wireless channel. Markov chain modelling is applied to analyze this system model. Analytical results show that when the number of hops that the TCP session crosses is ?xed, the TCP throughput is independent of the TCP congestion window size. When the number of hops increases from one, the TCP throughput decreases ?rst, and then stabilizes when the number of hops becomes large. The analysis is validated by comparing the numerical and simulation results.
Highlights
An adhoc network has no fixed infrastructure: data transmission depends on the temporary location of nodes and the transit distribution of traffic in the fly
Analytical results show that when the number of hops that the TCP session crosses is fixed, the TCP throughput is independent of the TCP congestion window size
Extensive simulations have been conducted to obtain a better understanding of TCP behaviour in adhoc wireless networks and to find ways of enhancing TCP performance in that environment
Summary
An adhoc network has no fixed infrastructure: data transmission depends on the temporary location of nodes and the transit distribution of traffic in the fly. This research work was motivated by the interesting observations of TCP in adhoc wireless networks (in simulations) reported in [1,2,4]: when a TCP connection runs over a static string topology (Figure 1), the TCP throughput measured decreases rapidly when the number of hops increases from one, and stabilizes when the number of hops becomes large. A system model for analyzing TCP performance in adhoc wireless networks is proposed after examining the case of running one TCP session over a string topology.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
