PLC-RED-based AQM algorithm in terminal communication access network

To develop intelligent power grid, it will undertake more businesses. People put forward higher requirements to communication process in power grid. As the increasingly needs of complex business in power terminal communication access network, this paper proposes a new AQM algorithm which based on differentiated services. This new algorithm calculates the average queue length and takes into account historical loss situation to predict the length of the buffer. And then changing the buffer length according to each queue buffer's idle condition. Simulation results show that this algorithm not only ensures high priority queue's QoS requirements, but also significantly improve the buffer utilization when congestion occurs.