标题：Upper bounds on lifetime of ordinary clustering ultra wide band sensor networks
作者：Xu, Juan ;Hong, Yong-Fa ;Wang, Cheng ;Bai, Xing-Zhen
作者机构：[Xu, Juan ;Wang, Cheng ;Bai, Xing-Zhen ] College of Electronics and Information Engineering, Tongji University, Shanghai 200092, China;[Hong, Yong-Fa 更多
来源：Ruan Jian Xue Bao/Journal of Software
摘要：This paper considers the time hopping impulse radio ultra wide band (TH-IR UWB) sensor networks, with n sensor nodes uniformly and independently located on a square and a Sink. The upper bounds on the lifetime of ordinary clustering dense and extended TH-IR UWB sensor networks are derived respectively. For ordinary clustering networks, the cluster head aggregates data from the nodes within its own cluster, and relays data to other cluster heads. The results indicate that the upper bounds on the lifetime of ordinary clustering dense TH-IR UWB are in proportion with the node density (or the number of nodes), while the upper bounds on the lifetime of extended networks are inversely proportional to the size of the deployment area (or the number of nodes). The results also reveal that the upper bound on the lifetime of dense network in the ideal case are longer than those of the static network by a factor of (n/log n)1/2, and the upper bound on the lifetime of extended network in the ideal case are longer than those of the static network by a factor of (λn/log(λn))1/2. Therefore, sensor nodes, or the Sink moving randomly in the square, can improve the lifetime of ordinary clustering TH-IR UWB sensor network. © 2011 ISCAS.