An Adaptive Packet Drop Probability Approach Using Fuzzy Logic to Control Congestion in MANET

Mobile ad-hoc network is an infrastructure less network where every node has its own protocols and services for powerful cooperation in the network. Every node has the ability to handle the congestion in its queues during traffic overflow. This was done through drop tail policy where the node drops the incoming packets to its queues during overflow condition. Previous studies showed that early dropping of incoming packet is an effective technique to avoid congestion. Such approach is known as active queue management. In this paper, entirely different approach is taken to minimize the congestion in which drop probabilities are changed according to the change in load value, known as adaptive drop probabilities. KeywordsQual-Net, mobile ad-hoc network, fuzzy system, network congestion, active queue management.