Title: CCTF: congestion control protocol based on trustworthiness of nodes in Wireless Sensor Networks using fuzzy logic

Authors: Mani Zarei, Amir Masoud Rahmani, Razieh Farazkish

Addresses: Computer Engineering Department, Science and Research Branch, Tehran, Islamic Azad University, P.O. Box 14515.775, Tehran, Iran. ' Computer Engineering Department, Science and Research Branch, Tehran, Islamic Azad University, P.O. Box 14515.775, Tehran, Iran. ' Computer Engineering Department, Science and Research Branch, Tehran, Islamic Azad University, P.O. Box 14515.775, Tehran, Iran

Abstract: In Wireless Sensor Networks (WSNs) the existence of malicious nodes is a serious challenge. Malicious nodes increase the traffic by sending distrusted messages. In this paper, we present CCTF: a congestion control protocol based on trustworthiness of nodes in WSNs using fuzzy logic. Through the use of CCTF, each node reduces malfunctioning neighbour(s) effects via dropping valueless packets and increases the buffer capacity; consequently, the chance of network congestion reduces. Simulation results show that when 16% of all nodes are malicious, CCTF increases the packet delivery ratio up to 40% meanwhile it reduces the packet drop ratio nearly 27.5%.

Keywords: WSNs; wireless sensor networks; trust; congestion control; malicious nodes; malfunctioning nodes; FIS; fuzzy inference system; membership function; fuzzified nodes; node trustworthiness; wireless networks; fuzzy logic; simulation.

DOI: 10.1504/IJAHUC.2011.041615

International Journal of Ad Hoc and Ubiquitous Computing, 2011 Vol.8 No.1/2, pp.54 - 63

Published online: 28 Jul 2011 *

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