Abstract:

ZigBee technology is a low-cost，low power consumption，short-distance wireless communication technology，which is widely applied in intelligent home. This paper describes the ZigBee communications protocol and method of network address assignment. Aiming at the problem of RREQ packets flooding at routing discovery phase in AODVjr algorithm and only considering the parent and child node in Cluster-Tree algorithm，an improved routing algorithm for ZigBee networks is proposed. In this improved algorithm，neighbor tables are introduced，AODVjr algorithm and Cluster-Tree algorithm are combined to control the direction of the RREQ packets. At the same time，the minimum residual energy of nodes is also considered. The simulation results indicate that this improved algorithm reduce the routing cost，extend the survival time of nodes，and balance the network load.

Key words: ZigBee network, intelligent home, routing algorithm, Cluster-Tree, AODVjr