A game theoretic approach for power allocation with QoS constraints in wireless multimedia sensor networks

Authors:
Haixia Cui;Gang Wei;Qinghua Huang;Yongcong Yu
Affiliations:
School of Electronics and Information Engineering, Guangzhou University, South China University of Technology, Guangzhou, China 510640;School of Electronics and Information Engineering, Guangzhou University, South China University of Technology, Guangzhou, China 510640;School of Electronics and Information Engineering, Guangzhou University, South China University of Technology, Guangzhou, China 510640;School of Electronics and Information Engineering, Guangzhou University, South China University of Technology, Guangzhou, China 510640
Venue:
Multimedia Tools and Applications
Year:
2011

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Abstract

The distinctive features of wireless multimedia sensor networks (WMSNs) include application-specific quality-of-service (QoS) requirements and limited energy supply, with which each node makes its own decisions selfishly. Therefore this paper presents a power control game theoretic approach for WMSNs by studying the effect of transmission power on QoS and energy efficiency. The game approach determines the transmission strategy using utility optimization according to the fluctuation of channel states. Here, the utility function is defined by effective throughput per unit power while satisfying the user's delay QoS constraints. The existence and uniqueness of Nash equilibrium for the proposed game are proved. Finally, the simulation results show that each user chooses the optimal transmission power to maximize its utility based on other constant parameters and the effects of delay constraints on the user's utility are quantified as well.