Using Game Approach to Control Bioeffects for Wireless Body Sensor Networks

This paper first investigates the bioeffects caused by radiofrequency transmission of sensor node, including thermal effects and athermal effects. The bioeffects model is studied in both near-field and far-field, in relation to specific absorption rate (SAR). A bioeffects metric is then proposed to evaluate the adverse biological effects. After identifying the factors that can reduce the adverse health effects in the communication system we propose a game theoretic model of distributed power control to analysis bioeffects for the system. The bioeffects cost function is introduced to the network utility as a metric to evaluate the performance of wireless body sensor networks in terms of health effect consideration. The two main contributions of this work are that a normalized bioeffects metric, equivalent coefficient-of-absorption-and-bioeffects (CAB), is derived to evaluate and design the communication protocols, and a novel game theoretic power control model is employed to balance the bioeffects for CDMA-based wireless body sensor networks.