Abstract: ZigBee networks are short-distance,low-energy consumption and low-data transmission rate wireless network technology based on IEEE 802.15.4 standard.Usually,its network life can be extended if the battery energy is utilized with high efficiency.In this paper,we mainly focused on ZigBee networks energy consumption based on distributed neighbor discovery mechanism.The mechanism can make the node of ZigBee find other neighbor nodes in an accessible area.The paper analyzed and obtained the number of required average frame in the discovering process for three distri-buted neighbor discovery algorithms,and presented energy consumption model for ZigBee networks.The energy consumptions of the requesting device and neighbor devices in these algorithms were analyzed and energy consumption expressions were given respectively.In simulation,we compared the energy consumption of the duty cycle and continuous mode of devices.The results show that the ZigBee network energy consumption,which is based on the distributed neighbor discovery algorithm,can achieve better energy saving effect when the time slot number is small if the competitive tree algorithm(CTA) is selected.And when the number of frame time slot is large,the framed slotted ALHOA without feedback packet(FSA_noFBP) and framed slotted ALHOA with feedback packet(FSA_FBP) ought to be selected.

Key words: ZigBee networks,Distributed neighbor discovery,Number of average frame,Energy consumption