Distributed optimization based on utility with delay constraints in wireless sensor networks

Authors:
Shengbin Liao;Wenqing Cheng;Wei Liu;Zongkai Yang
Affiliations:
Dept. of Electronics and Information Engineering, Huazhong University of Science and Technology, China and Engineering and Research Center of Information and Technology on Education, Huazhong Norm ...;Engineering and Research Center of Information and Technology on Education, Huazhong Normal University;Engineering and Research Center of Information and Technology on Education, Huazhong Normal University;Dept. of Electronics and Information Engineering, Huazhong University of Science and Technology, China and Engineering and Research Center of Information and Technology on Education, Huazhong Norm ...
Venue:
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Year:
2009

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Abstract

Delay requirement becomes a key problem for the time sensitive applications in wireless sensor networks besides the power conservation issue. This paper proposes a novel Network Utility Maximization (NUM) model with constrained delay for real-time applications in wireless sensor networks. By using dual decomposition techniques, we present a distributed iterative price and rate adaption algorithm which converges to the global optimal solution. The presented algorithm can jointly control congestion and contention while meeting the delay requirement of each flow in the network. Numerical results validate our arguments.