ZigBee路由算法在古树名木监控中的应用

从最大化网络寿命的角度出发，对系统中的ZigBee路由算法进行改进。利用系统中数据传输方向固定的特点，对RREQ报文的传输方向进行控制，减少不必要的RREQ报文，降低因RREQ泛洪造成的节点能量损耗。通过对节点划分不同的能量区域，均衡使用各节点能量，避免低能量节点的过度使用，延长网络的生存时间。NS—2仿真结果表明：网络中传输的RREQ报文数量明显减少和节点存活率提高，有效提高了古树名木监控系统的监控范围和监控效率。

Application of ZigBee routing algorithm in monitoring of ancient and famous trees

Combined with actual application of ZigBee in monitoring on ancient and famous trees,the ZigBee routing algorithm used in the system is improved from the view of maximizing lifetime of network. Using characteristic of data transmitssion in a fixed direction in system,control on transmission direction of RREQ packets to reduce unnecessary RREQ packets,and decrease losses of node energy caused by flooding of RREQ. By dividing nodes into different energy regions,it makes the energy of node can be used in balanced and avoids node in low energy being excessively used,so as to prolong survival time of network. Results of simulation using NS—2 show that numbers of RREQ packets in the network are significantly reduced and the rate of node survival is increased. It effectively improves monitoring range and efficiency of system.