FIPD: Fuzzy Based Intelligent Packet Dropping Technique for Congestion Due to Buffer Overflow in Wireless Sensor Network

Congestion plays a vital role in degrading the performance of the network. Under idle condition, network traffic is less whereas when an event is detected, the network traffic becomes high thus leading to congestion in the network. To ensure the reliability of the network an efficient protocol is proposed to detect and control congestion. Though there are various sources for congestion, the significant source for congestion is Buffer Overflow . We have proposed a new algorithm to detect and control congestion in a Wireless Sensor Network using Fuzzy Logic Controller. The congestion is detected by calculating the back logged packets in the queue. Depending on Buffer Occupancy(BO) , level of congestion is analyzed . In order to control congestion , an effective congestion control algorithm called Fuzzy Based Intelligent Packet Dropping(FIPD) is proposed. Congestion is controlled by dropping the packets based on priority assigned to the data packets i.e Intelligent Packet Dropping. This technique is implemented successfully in NS-2 simulator.