HRCCTP: A hybrid reliable and congestion control transport protocol for wireless sensor networks

In wireless sensor networks, sensor nodes have extremely restricted power because of hardware constraints. Packet losses and retransmissions effect from congestion enhance latency in the network and diminish delivery ratio and valuable energy and reduce the lifetime of sensor nodes. In this paper, reliable and congestion based transport layer protocol has been proposed which provides an efficient mechanism for achieving reliability and congestion control. During the congestion situation, it focuses to maintain the reliability of information flow to the sink. It uses buffer size to detect congestion and rate adjustment to optimal value is used to mitigate congestion. We present the design and implementation of the proposed protocol and compare it with the existing protocol. Simulation results show a higher packet delivery ratio and throughput with reduced latency and energy loss for proposed protocol in comparison with the existing protocol.