Research on MAC Protocol in Wireless Sensor Networks for Electricity Information Collection System
Yi Sun · Modern Electric Power · 2013
As the cluster head collector in the electricity information collection system has high buffer occupancy rate,a priority adaptive MAC(PA-MAC) protocol is presented to regulate node priority adaptively according to the buffer occupancy rate,which enhances the competition of channel for the nodes with high buffer occupancy rate,and increases data transmission quantity of nodes.By using of distributed algorithm,network load state is evaluated by the transferring status of data packets of node.And by combining buffer occupancy rate and value range of current competing window,the variation of competing window is regulated to reduce collision probability of data packets.Simulation results show that this algorithm relieves buffer pressure of collector nodes,and improves such performances as normalized saturation throughput,packet loss rate,and congestion recovery of local network for electricity information collection system.