Minimizing Congestion in Wireless Sensor Network Using ETRI Dual Queue Scheduler

In order to respond within a fraction of seconds in case of critical conditions like explosions, fire and leaking of toxic gases, there must be a system which should be fast enough to respond. A big challenge to sensor networks is a fast, reliable and fault tolerant channel during emergency conditions to sink (base station) that receives the events . When a particular event is detected, the sensor nodes become active and there is a sudden burst of traffic towards the sink. This may lead to buffer overflow at the nodes causing packet drops and finally degrades overall network performance. Congestion leads to wastage of energy and minimizes the lifetime of sensor nodes. In sensor networks more energy is spend for communication rather than for computation. Hence it is necessary to ensure that the drop rate of transit packets which travel many hops in the network is reduced. How to efficiently use energy, enhance information quality, and improve transmission performance are three key issues of today’s wireless sensor networks. Packet scheduling for wireless communication subsystem is one of the most important methods to achieve these issues. In this paper, we propose an effective method that optimizes the energy consumption, packet scheduling, information quality etc by using the energy, time, reward, interest algorithm (ETRI) with the support of the dual queue scheduler. In this system we classify the dual queue scheduler and the ETRI method separately to make the proposed system much clear and verify its results for the further discussions.