Performance Evaluation of Quality Based Bidirectional Reliability Protocol for Wireless Sensor Networks

Wireless sensor network consists of sensor nodes with limited battery power. In our protocol energy conservation is provided through clustering and bidirectional reliability. Bidirectional reliability includes event reliability and query reliability. Event detection is made possible with collective information received from many sensor nodes. But this increases congestion in the network and reduces the network life time. So we go for quality based event detection by classifying nodes as essential and non-essential nodes after which clustering is done. This classification is based on contribution degree and remaining energy. Many clusters are formed to cover the entire sensing field. In each cluster essential node communicates with sink node whereas nonessential node communicates only with essential nodes and they do not report event information to the sink node. The query information transmitted by the sink node is received only by essential nodes and then forwarded to non-essential nodes. Thus our proposed protocol achieves the bidirectional reliability between sink node and essential nodes. We have evaluated the performance of QBRP through simulation experiments. The simulation results show that QBRP achieves higher performance in terms of energy consumption, communication delay, and jitter.