低压电力线通信组网性能优化方法

Performance optimization for low voltage power line communication

低压电力线载波通信介质访问控制(MAC)接入协议是影响组网性能的重要因素之一。针对低压电力线通信信道非对称性导致组网性能相对较低的问题,提出面向低压电力线通信改进人工蛛网荷载受限的改进型自适应p-坚持载波侦听多路访问(CSMA)优化方法。详叙了低压配电网物理拓扑映射为改进人工蛛网逻辑拓扑的组网过程;运用所提方法对改进人工蛛网的吞吐量、分组传输时延进行优化,即根据已知参与信道竞争的活跃节点数,动态调整接入概率,控制节点发送数据分组行为,使信道处于最佳传输状态,保证了组网性能。仿真结果验证了所提方法的有效性。

The low voltage PLC（Power Line Communication） media access control protocol is an important factor that affect the network performance. In order to improve the relatively low network performance caused by the asymmetric PLC channels,an improved adaptive p-persistent CSMA optimization method for improved artificial cobweb with limited load in low voltage PLC is proposed. The networking process of the media access control layer of three-phase distribution network being mapped into the improved artificial cobweb is described in detail. The proposed method is applied to optimize the throughput and average package delay of cobweb,i.e. dynamically adjust the access probability and control the grouping behavior during data transmission based on the amount of known active nodes participating in channel competition,which makes the channel in the best transmission status and ensures the network performance. The simulative results show that the proposed method is effective.