RAHTAP Algorithm for Congestion Control in Wireless Sensor Network

Abstract: Wireless sensor network (WSNs) can be constructed as an intelligent, large autonomous instrument for scientific observation at fine temporal and spatial granularities and over large areas such as environmental monitoring. WSNs typically operate under light load and suddenly become activate in response to a detected or monitored events. Depending on the application this can result in the generation of a large, sudden, and correlated impulse of data that must be delivered to a small no of sinks without disrupting the performance of the sensing application. This generation of data packets is usually uncontrolled and often leads to congestion. There are two techniques by which congestion can be reduced which are: either by reducing the data sending rate of source or by providing extra resources. Congestion in WSNs is high if load in the network is high. So network load is reduced upon elimination of redundant number of packets in WSNs. In this paper we implement Redundancy Aware Hierarchical Tree Alternative Path (RAHTAP) algorithm which eliminates the duplicate packets from the network and achieve reduction in network load as per packets basis which create dynamic alternative path from source to sink when congestion on a particular node. This algorithm works over the thought of existing congestion control algorithm HTAP. We use here QualNet Simulator to mimic the consequence which demonstrates RAHTAP is a proficient calculation and straightforward solution for confronting over-burden circumstance in WSN in examination with HTAP.

Keywords: Wireless Sensor network, Congestion control, Alternative path routing, Energy efficiency.