As a particular network of wireless networks, Ad Hoc network has a good prospect of application because of its advantages of quick and easy networking, simple communication protocols, without any infrastructure, survivability capability, distributed topology and less energy consumption. The available study results show that TCP protocol, which was widely used in wired networks, can not be efficiently used in wireless networks. The reason is that packet loss is the only indication of congestion in TCP congestion control of wired networks, while in wireless network, besides the network congestion, the high error rate, interference, channel competition and the routing break due to mobility of the wireless environment can also cause packet loss. In Ad Hoc networks TCP can not distinguish these specific reasons for packet loss and deals with it as congestion, resulting in the performance degrade dramatically.Abundant Ad Hoc network scenes are modeled and simulated on the OPNET simulation platform, and varieties of throughput, stability and fairness of TCP in all kind of simulation scenes are inspected and analyzed intensively in this thesis.
