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- Title
A Utility-Based and QoS-Aware Power Control Scheme for Wireless Body Area Networks.
- Authors
Yanjun Li; Jian Pan; Xianzhong Tian
- Abstract
Power control is widely used to reduce co-channel interference in wireless networks and guarantee the signal-to-interference plus noise ratio (SINR) of ongoing connections. This technique is also effective for wireless body area networks (WBANs). Although achieving satisfactory SINR is important for WBAN users, they may not be willing to achieve it at arbitrarily high power levels since power is a scarce resource in WBANs. Besides, for WBANs with different purposes, the QoS requirements and concern about the power consumption may be different. This motivates us to formulate the power control problem using the concepts from microeconomics and game theory. In this paper, the QoS objective is viewed as a utility function, which represents the degree of user satisfaction, while the power consumption is viewed as a cost function. The power control problem consequently becomes a non-cooperative multiplayer game, in which each player tries to maximize its net utility, i.e., the utility minus the cost. Within this framework, we investigate the Nash equilibrium existence and uniqueness in the game and derive the best response solution to reach the Nash equilibrium. To obtain the optimal transmission power in a distributed way, we further propose a utility-based and QoS-aware power control algorithm (UQoS-PCA). Tunable cost coefficient in UQoS-PCA enables this scheme to be flexible to satisfy diverse service requirements. Simulation results show the convergence and effectiveness of the proposed scheme as well as improvements over existing algorithm.
- Subjects
BODY area networks; QUALITY of service; SIGNAL-to-noise ratio; UTILITY functions; ENERGY consumption
- Publication
KSII Transactions on Internet & Information Systems, 2016, Vol 10, Issue 9, p4188
- ISSN
1976-7277
- Publication type
Article
- DOI
10.3837/tiis.2016.09.009