Abstract: A non-cooperative power control algorithm is proposed based on the model of wireless CDMA sensor networks. A node payoff function which involved of utility function and cost function is modeled in the algorithm and the transmitting power vector is obtained by parallel update. It is proved that the sensor network can reach Nash Equilibrium with this transmitting power vector, and in this situation all the nodes’ payoff function is maximized. The OPNET is applied to simulation process of the algorithm, during which simulation has been carried out with different index combinations. Results show that the power control algorithm based on the game theory model has a very good astringency. Performance of the system can be improved through the selection of the utility factor between 1.0~1.1 and price factor between 5.5~5.9.

Key words: wireless sensor networks, power control, non-cooperative game

摘要： 针对基于CDMA通信方式的传感器网络模型，采用非合作博弈功率控制算法对网络中的节点进行分布式功率控制。在算法中为传感器节点构造包含效用函数和代价函数的支付函数模型，通过并行迭代的方式获得网络功率控制的纳什均衡策略，使所有节点的支付函数达到最优化。为了验证算法的有效性，采用OPNET对不同参数组合下的情况进行仿真，仿真结果表明，基于博弈论模型的非合作博弈功率控制算法具有很好的收敛性，当选择效用因子在1.0~1.1、价格因子在5.5~5.9时，网络具有很好的性能。

关键词: 无线传感器网络, 功率控制, 非合作博弈

CLC Number: 

• TP393