低压电力线通信网络性能的博弈分析及优化

摘要

The media access control protocols of low voltage power line carrier(PLC) communication are the important factors for the network performance including bandwidth availability ratio and access delay.Considering the relatively low performance due to the asymmetric PLC communication channels and noise interference,this paper proposes an improved adaptive p-persistent carrier sense multiple access (CSMA) game optimization method for the limited load mesh network in low voltage PLC communication.Each node estimates the current state of the game by using the hidden Markov game model.Then each node adaptively regulates the equilibrium strategy of receiving and transmitting terminals based on the game result.The data transmission is controlled to reduce the collision probability of data packets.The power line channel transmission status is guaranteed optimum state to increase the network saturation performance.The simulation results show that this method is effective.%低压电力线载波通信介质访问控制接入协议是影响网络饱和性能(带宽利用率、接入时延)的重要因素之一.针对低压电力线通信信道非对称性及噪声干扰严重影响饱和性能的问题,提出了一种适用于低压电力线载波通信荷载受限的改进型自适应p-坚持载波侦听多路访问博弈优化方法.节点采用隐马尔可夫模型对当前信道竞争的博弈节点进行动态估计;根据博弈结果自适应调整收发端的纳什均衡,控制节点发送数据包行为,降低数据包冲突概率,保证信道处于最佳传输状态,获取最佳饱和性能.仿真结果验证了所述方法的有效性.