Interference Mitigation for Wireless Body Area Networks with Fast Convergent Game

Wireless Body Area Networks (WBAN) have broad prospects for the use in mobile health, sports training support, etc. One critical research problem on WBAN is the cross-interference among multiple WBANs when they are close to each other, because they work on unlicensed open wireless frequency bands. This paper proposes a social group interaction power control game model to mitigate inter-WBAN interference, which consists of new utility and cost functions designed to accommodate both convergence speed and quality. This work proves that only one Nash equilibrium (NE) point exists for this game model, which guarantees its convergence. Extensive simulation has been performed to evaluate the performance and the results demonstrate that the proposed algorithm is highly effective and the convergence is rapid.