Self-healing hierarchical architecture for ZigBee network in smart grid application

摘要

In this paper, by analysing the characteristics of node assignments, network structures and the data transmission in the smart grid, we propose and evaluate a self-healing hierarchical architecture (SHA) for the ZigBee networks in the smart grid application. The SHA could maintain the network structure based on the link quality indication (LQI) and the modified neighbour table information to optimise the parent child relationship from the viewpoint of overall network. A backup loop scheme is also introduced to enhance the robustness. A backup link is calculated for each node based on the network address information. The simulation results show that the SHA achieves better performance by obtaining lower average hops, lower transmitter power and less bit error rates. For the backup loop scheme, the result shows it has a greater packet delivery ratio when network topology is damaged.