QoS aware Energy Efficient Routing protocol for Wireless Sensor Network

In WSN, sensors near the static sink have to relay the data of the nodes away from the sink and as a result they drain their energy very quickly. It result in network partitioning and can significantly limit the network lifetime, problem is termed as hotspot problem. Contrary to static sink, in recent years, mobile sink approach has been used to address the hotspot problem but it increase end to end delay which is not acceptable for delay sensitive application. To solve these two issues namely hot-spot problem and delay minimization problem, this paper presents QoS aware Energy Efficient Routing (QEER) protocol for Clustered Wireless Sensor Network. To address energy efficiency (hotspot problem) and high end to end delay problem, a combination of mobile and static sink is used for data gathering. Delay sensitive messages are sent through the static sink and delay tolerant message are send through the mobile sink. In this way, the proposed protocol incurs less end to end delay and is energy efficient. Intensive Simulations are carried out to evaluate the performance of the proposed strategy. Performance of the proposed strategy is compared with the static sink and mobile sink strategies. The simulation results demonstrated that QEER has prolonged the network lifetime and minimized the delay.