Fault tolerance of connectivity performance in CDMA-based wireless sensor networks

Authors:
Yung-Fa Huang;Ching-Mu Chen;Tsair-Rong Chen;Jong-Shin Chen;John Sum
Affiliations:
Graduate Institute of Network and Communication Engineering, Chaoyang University of Technology, Taiwan, R.O.C.;Department of Electrical Engineering, National Changhua University of Education, Taiwan, R.O.C.;Department of Electrical Engineering, National Changhua University of Education, Taiwan, R.O.C.;Graduate Institute of Network and Communication Engineering, Chaoyang University of Technology, Taiwan, R.O.C.;Institute of Electronic Commerce, National Chung Hsing University, Taichung, Taiwan, R.O.C.
Venue:
ISPA'07 Proceedings of the 2007 international conference on Frontiers of High Performance Computing and Networking
Year:
2007

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Abstract

In this paper, we investigate the fault tolerance of connectivity probability for CDMA-based wireless sensor networks with variations of nodes deployment. The variations of deployment are modeled by 2D Gaussian distribution with zero-mean for the triangle, grid and hexagon topologies. Thus, the k-connectivity performance is studied through the outage probability of CDMA signal links. We evaluate the connectivity performance with SIR0,3-con, the minimum requirement of SIR, SIR0 for the 3-connectivity, when the nodes suffer a failure rate Pf. Simulation results show that the hexagonal and grid topologies suffer a degradation of -2.4 and -0.5 dB, respectively, when the failure rate Pf equals 0.1. However, the triangular topology shows robust fault tolerance with the failure rate Pf below 0.5 and moderate variations of deployment.