An AIAD-Based Adaptive Routing Protocol in Ad-Hoc Wireless Networks

摘要

AODV routing protocol is intended for use by mobile nodes in ad-hoc wireless networks. Even though it performs well in static and low-mobility environments, the performance degrades rapidly with increasing mobility. Our primary concern is to enhance the performance of AODV by reducing the volume of the control packets like RREQ and RREP during the route discovery process effectively due to the node mobility. The propagation delays of the all possible links vary according to changes in its topology. Carefully adjusting the values of these network parameters can reduce the occurrences of the control packets. Thus, we propose a novel method of smoothly adjusting them based on AIAD (additive increase additive decrease) under a consideration of current network status. We have tested our proposed method with both the conventional AODV and the method using timestamp based on the three performance metrics; i.e., node mobility, node velocity, and node density, to compare their performances.