针对链状线型无线传感器网络中多Sink特点,提出一种基于梯度的分簇成链算法CLBG(Clustering into Link Based on Gradient),节点选择距离最近的Sink传输数据,避免了远距离传输造成的节点能量消耗。成簇后,簇中节点以簇头为首成链,节点...针对链状线型无线传感器网络中多Sink特点,提出一种基于梯度的分簇成链算法CLBG(Clustering into Link Based on Gradient),节点选择距离最近的Sink传输数据,避免了远距离传输造成的节点能量消耗。成簇后,簇中节点以簇头为首成链,节点沿链发送数据给簇头,再由簇头通过簇间的多跳传输将数据发往Sink。当链路出现故障时,利用该算法可反向建立传输链路,保证数据及时传输。仿真结果表明,基于梯度的分簇成链算法,能有效节省节点能量,避免节点过早死亡,延长网络的生命周期。展开更多
A wireless body area network (WBAN) allows integration of low power, invasive or noninvasive miniaturized sensors around a human body. WBAN is expected to become a basic infrastructure element for human health monitor...A wireless body area network (WBAN) allows integration of low power, invasive or noninvasive miniaturized sensors around a human body. WBAN is expected to become a basic infrastructure element for human health monitoring. The Task Group 6 of IEEE 802.15 is formed to address specific needs of body area network. It defines a medium access control layer that supports various physical layers. In this work, we analyze the efficiency of simple slotted ALOHA scheme, and then propose a novel allocation scheme that controls the random access period and packet transmission probability to optimize channel efficiency. NS-2 simulations have been carried out to evaluate its performance. The simulation results demonstrate significant performance improvement in latency and throughput using the proposed MAC algorithm.展开更多
文摘针对链状线型无线传感器网络中多Sink特点,提出一种基于梯度的分簇成链算法CLBG(Clustering into Link Based on Gradient),节点选择距离最近的Sink传输数据,避免了远距离传输造成的节点能量消耗。成簇后,簇中节点以簇头为首成链,节点沿链发送数据给簇头,再由簇头通过簇间的多跳传输将数据发往Sink。当链路出现故障时,利用该算法可反向建立传输链路,保证数据及时传输。仿真结果表明,基于梯度的分簇成链算法,能有效节省节点能量,避免节点过早死亡,延长网络的生命周期。
基金Project(2010-0020163) supported by Inha University Research and by Basic Science Research Program through the National Research Foundation of Korea(NRF) Funded by the Ministry of Education, Korea
文摘A wireless body area network (WBAN) allows integration of low power, invasive or noninvasive miniaturized sensors around a human body. WBAN is expected to become a basic infrastructure element for human health monitoring. The Task Group 6 of IEEE 802.15 is formed to address specific needs of body area network. It defines a medium access control layer that supports various physical layers. In this work, we analyze the efficiency of simple slotted ALOHA scheme, and then propose a novel allocation scheme that controls the random access period and packet transmission probability to optimize channel efficiency. NS-2 simulations have been carried out to evaluate its performance. The simulation results demonstrate significant performance improvement in latency and throughput using the proposed MAC algorithm.
