Reinvented Fuzzy logic Secure Media Access Control Protocol (FSMAC) to improve lifespan of Wireless Sensor Networks

Wireless Sensor Networks (WSN) have grown in size and importance in a very short time. WSN is very sensitive to various attacks, hence Security has become prominent issue in WSNs. Denial-Of-Service (DOS) attack is one of main concern for WSNs. DOS Attack diminishes the resources of sensor nodes which affect the normal functioning of the node. Media Access Control (MAC) layer is responsible for communication within multiple access networks and incorporates shared medium. Fuzzy logic-optimized Secure Media Access Control (FSMAC) Protocol gives good solution against DOS Attack. It detects all intrusion taking place and also decreases average energy consumed by the sensor network than in attacked scenario. These results are responsible for increase in the lifespan of a sensor network. Fuzzy logic deals with uncertainty for human reasoning and decision making. Innovational use of Fuzzy logic theory is applied to this FSMAC protocol to enhance the performance. Here in this paper, Reinvention in FSMAC protocol is proposed using new intrusion detector parameters like No of times node sensed channel free and Variation in channel sense period. Performance of new protocol is tested on the basis of time of first node dead and average energy consumed by the sensor node. These results show that the lifespan of sensor network increases and average energy consumed by sensor node decreases.