Congestion control for optimizing data transfer rate in mobile Ad-hoc networks using HSTCP

In the communication era congestion is the bottleneck which degrades the performance. In Ad hoc networks due to infrastructure less character there is no guaranteed bandwidth and node mobility. The traditional TCP variants were good for wired environment, whereas in Ad-hoc networks there are lots of other factors to be considered. We are comparing the traditional TCP Reno and its new variant HSTCP for congestion handling. The congestion window is one of the factors that determine the number of bytes that can be outstanding at any time. The congestion window indicates the maximum amount of data that can be sent out on a connection without being acknowledged. HSTCP comes into picture only if the congestion window size increases abruptly. To improve the retransmission time and to avoid congestion in completely dynamic conditions where node mobility is completely random is the main concern of our research work. HSTCP outperforms when compared to TCP Reno for different network parameters.