Performance Evaluation of Dynamic Zone Radius Estimation in ZRP for Multihop Adhoc Networks.

Due to self-organizing and self-configuring nature of multihop adhoc networks, routing is the most challenging task. Zone routing protocol (ZRP) is one of the hybrid routing protocols that combines the benefits offered by reactive and proactive routing protocol. But ZRP leads to performance degradation as it assumes that all nodes are moving in uniform speed with static zone radius, irrespective of current network status. To enhance the performance of ZRP, this paper proposes an adaptive mobility, density and energy based zone routing protocol (MDE-ZRP) using fuzzy logic to facilitate dynamic zone radius determination based on mobility speed, neighborhood density and residual energy of nodes. The analytical model for determining routing overhead of the proposed protocol is also developed to ensure performance enhancements. The NS2 simulation of the proposed MDE-ZRP is performed under random waypoint and multi mobility models with varying number of nodes. The extensive simulation results reveal that the proposed MDE-ZRP outperforms ZRP, optimized velocity based adaptive ZRP (OVBAZRP) in terms of routing overhead, jitter, energy consumption, packet delivery ratio, loss and collision rate. [ABSTRACT FROM AUTHOR]