Interference Management in Ad Hoc Networks

Abstract

Wireless ad hoc network is an infrastructure-less network which possess characteristics like decentralized administration and very less efforts for setup. In ad hoc networks, no such entity is determined that tells us the optimum route for data flow. As several nodes contend for the medium at same time so there is a high probability that the nodes will interfere each other's communication. Therefore, the interference in the network among the users needs to be managed using intelligent Multi-access control (MAC) schemes. This work focuses on the efficient interference management in wireless ad hoc networks. Several implementation of different MAC schemes for interference management that includes Aloha, Spread-spectrum (SS) and Frequency-hopping (FH) schemes have been implemented and analyzed. For this purpose, a system model is assumed to observe the nature and impact of interference. MATLAB implementation results show that near-field interferers are the major cause of interference but far-field interferers also constitute approximately 80% towards interference hence can't be ignored and needs to be managed. The results further deduce that FH scheme gives best result in reducing interference and increasing Transmission Capacity (TC) when compared to Aloha and SS schemes in a given outage constraint.