IMPACT OF MOBILITY FOR QOS BASED SECURE MANET

Secure multicast communication in Mobile Adhoc Networks (MANETs) is challenging due to its inherentcharacteristics of infrastructure-less architecture with lack of central authority, limited resources such asbandwidth, energy and power. Several group oriented applications over MANETs create new challengesto routing protocols in terms of QOS requirements. In many multicast interactions, due to its frequentnode mobility, new member can join and current members can leave at a time. It is necessary to choose arouting protocol which establishes true connectivity between the mobile nodes. The pattern of movementof members is classified into different mobility models and each one has its own distinct features. It is acrucial part in the performance of MANET. Hence key management is the fundamental challenge inachieving secure communication using multicast key distribution for mobile adhoc networks. This paperdescribes the impact of mobility models for the performance of a new cluster-based multicast treealgorithm with destination sequenced distance vector routing protocol in terms of QOS requirementssuch as end to end delay, energy consumption and key delivery ratio. For simulation purposes, threemobility models are considered. Simulation results illustrate the performance of routing protocol withdifferent mobility models and different mobility speed under varying network conditions.