低压电力线通信网络特性模型与组网算法

由于低压电力线载波通信网络具有物理拓扑复杂和电力线信道时变的特征，在实际应用中存在着通信可靠性较低的问题。为了提高低压配电网电力线载波通信系统可靠性，在总结前人提高电力线通信可靠性的研究基础上，分析电力线通信网络的拓扑结构和组网模型，并提出组网的优化目标函数；进而提出一种基于信道状态和服务需求的电力线通信组网算法。分析了网络拓扑结构，信道特性和通信误码率、传输延时之间的关系，并提出估算方法。仿真试验结果表明，所提算法可根据信道和通信链路的动态变化以及不同的服务需求而动态地建立并优化电力线通信网络路由，保证通信网络的有效性，为后续的工程应用提供参考。

Characteristics Model and Routing Algorithm of Power-line Communications Over Low-voltage Distributions

Physical topology of low-voltage distribution network is complex and the power-line communications (PLC) channel status varies dynamically. Therefore, the reliability of PLC over low-voltage networks needs to be enhanced. The various methods for enhancing the reliability of PLC over low-voltage networks were presented. The topology of the PLC networks and the routing model were analyzed and the optimization object function for PLC routing algorithm was proposed. A PLC routing algorithm was presented and discussed on the base of channel status and service requirements. The relationships of the PLC channel characteristics to the communication delay and the communication error-rate are analyzed. In addition, the estimation methods of channel error-rate and delay were also put forward. The simulation results show that by the algorith, routes of PLC networks can be dynamically constructed and optimized according to the variation of channel quality. The proposed routing algorithm will provide reference for the engineering application.