| This thesis presents a scheme that employs TCP-Aware network coding with opportunistic scheduling to enhance TCP performance in wireless mobile ad hoc networks. Specifically, it considers a TCP parameter, congestion window size and wireless channel conditions simultaneously to increase TCP throughput. Evaluation of this scheme is carried out by using ns2 simulations in different scenarios such as network traffic increase, network node increase, and low/high mobility environments. The results found show that this scheme gives approximately 35% throughput improvement in a high mobility environment and about 33% throughput improvement in no or low mobility environment as compared to traditional network coding with opportunistic scheduling. This thesis also proposes a new adaptive-W scheme whose objective is to adaptively control waiting time of overheard packets that are stored in a buffer to achieve tradeoff between throughput and overhead. |
