Lifetime Optimization via Network Sectoring in Cooperative Wireless Sensor Networks

Hadi Jamali Rad, Bahman Abolhassani, Mohammad Abdizadeh

.

DOI: 10.4236/wsn.2010.212108                

Abstract

Employing cooperative communication in multihop wireless sensor networks provides the network with significant energy efficiency. However, the lifetime of such a network is directly dependant upon the lifetime of each of its individual sections (or clusters). Ignoring the fact that those sections close to sink have to forward more data (their own data plus the data received from the previous sections) and hence die sooner with considering equal section sizes, leads to a sub-optimal lifetime. In this paper, we optimize the section sizes of a multihop cooperative WSN so that it maximizes the network lifetime. Simulation results demonstrate a significant lifetime enhancement for the proposed optimal sectoring.

Keywords

Wireless Sensor Network (WSN), Cooperative Communications, Virtual Multi-Input-Multi-Output (V-MIMO), Energy Efficiency

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	S. Alamouti, “A Simple Transmit Diversity Technique for Wireless Communications,” IEEE Journal on Selected Areas in Communications, Vol. 16, No. 8, October 1998, pp. 1451-1458.
[2]	J. N. Laneman, D. N. C. Tse and G. W. Wornell, “Co- operative Diversity in Wireless Networks: Effcient Pro- tocols and Outage Behaviour,” IEEE Transactions on Informormation Theory, Vol. 50, No. 12, December 2004, pp. 3062-3080.
[3]	S. Cui, A. J. Goldsmith and A. Bahai, “Energy-Efficiency of MIMO and Cooperative MIMO Techniques in Sensor Networks,” IEEE Journal on Selected Areas in Commu- nications, Vol. 22, No. 6, August 2004, pp. 1089-1098.
[4]	S. K. Jayaweera, “Virtual MIMO-Based Cooperative Com- munication for Energy-Constrained Wireless Sensor Net- works,” IEEE Transactions on Wireless Communications, Vol. 5, No. 5, May 2006, pp. 984-989.
[5]	M. Mashreghi and B. Abolhassani, “Prolongation of Life- time for Wireless Sensor Networks,” Proceedings of Inter- national Conference on Intelligent Sensors, Sensor Networks and Information Processing, Melbourne, 3-6 December 2007, pp. 73-78.
[6]	K. Lu, S. Fu and X.-G. Xia, “Closed Form Designs of Complex Orthogonal Space-Time Block Codes of Rates (k+1)/(2k) for 2k1 or 2k Transmit Antennas,” Proceedings of IEEE International Symposium on Information Theory, Chicago, 27 June-2 July 2004, p. 307.
[7]	H. S. Boyd and L. Vandenberghe, “Convex Optimization,” Cambridge University Press, Cambridge, 2004.