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Journal of Electrical and Computer Engineering
Volume 2010, Article ID 650756, 5 pages
http://dx.doi.org/10.1155/2010/650756
Research Article

Experimental Evaluation of Optimal Rate Delay and Power Allocation Algorithm in Wireless Control Networks

1Department of Electrical Engineering, University of Engineering and Technology Lahore, Lahore 54390, Pakistan
2Department of Electrical and Computer Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA

Received 6 August 2009; Revised 2 February 2010; Accepted 8 March 2010

Academic Editor: Luca De Nardis

Copyright © 2010 Muhammad Tahir and S. K. Mazumder. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The network utility maximization (NUM) framework, widely used for wireless networks to achieve optimal resource allocation, has led to both centralized as well as distributed algorithms. We compare the convergence performance of centralized realization of the NUM framework with that of distributed realization by implementing the algorithms using a hardware test-bed. Experimental results show a superior convergence performance for centralized implementation compared to the distributed implementation, which is attributed to the dominance of communication delay over processing delay. The convergence results for the distributed case also show a tradeoff between processing time and the associated communication overhead providing an optimal termination criterion for the convergence of different subproblems.