无线传感网络中基于非协作对策的功率控制

In wireless sensor networks, energy consumption is a major concern when nodes are battery powered. Generally sensor nodes are placed in a distributive way. In this case, nodes don't know the information of others, and cannot fully cooperate with each other. A dilemma exists among the transmission is that the increment of transmission power not only can improve the capacity and lower the bit error rate (BER) but also act as interference to others. A non-cooperative framework based on game theory was proposed to solve this power control problem. Based on the urgency level of information, the utility function was tunable for the users during the transmission. The existence of unique Nash Equilibrium (NE) was proved in this non-cooperative framework. And the stability of the system was guaranteed under the proposed condition. Finally, the NPC algorithm was advanced. And based on that, quick convergence could be achieved by the users to reach the NE point. Experiments showed that good network performance is achieved under reasonable power strategy.