A Preemptive Distributed Address Assignment Mechanism for Wireless Sensor Networks

Dynamic address assignment is a desirable feature for deploying wireless sensor network. Typically, a distributed address assignment mechanism is accomplished by ZigBee alliance, whereas, sensors join a network is unpredictable, it may engender uneven node density, so it is possible that one node exhausts its list of addresses while another node has addresses go unused. Therefore, a preemptive approach is needed for ZigBee addressing mechanism. This paper presents a preemptive distributed address assignment to provide a preemptive scheme for ZigBee addressing mechanism. In addition, we give an autorouting algorithm. Simulation results show that nodes can acquire an address even in high node density area, and the scheme increases the total number of nodes in a sensor network.