Multi-hop transmission performance of cognitive temporary bypassing for wireless ad hoc networks

Authors:
Kenichi Nagao;Yusuke Kadowaki;Yasushi Yamao
Affiliations:
Advanced Wireless Communication Research Center, The University of Electro-Communications, Tokyo Japan;Advanced Wireless Communication Research Center, The University of Electro-Communications, Tokyo Japan;Advanced Wireless Communication Research Center, The University of Electro-Communications, Tokyo Japan
Venue:
CCNC'09 Proceedings of the 6th IEEE Conference on Consumer Communications and Networking Conference
Year:
2009

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Abstract

In wireless ad hoc networks, the link SNR varies due to fading and this causes a temporary link error and blocks the multi-hop packet transmission. The cognitive temporary bypassing method was proposed to improve the transmission quality. In this paper, the proposed protocol is improved by adding acknowledgement and anti-collision functions necessary to achieve reliable multi-hop transmission. Packet success probability with the improved method has been analyzed for Rayleigh faded wireless links as functions of hop count. Simulation results using a modified QualNet simulator validate that packet success probability is remarkably improved with the method for maximum Doppler frequencies up to 30Hz.