针对水声传感器网络高能耗的特点，该文提出了基于空间唤醒的节能路由协议ERBSW（Energy-efficient Routing protocol Based on Spatial Wakeup），该协议将3维网络空间划分为唤醒层和睡眠层，每个节点根据当前的深度信息，动态地决定...针对水声传感器网络高能耗的特点，该文提出了基于空间唤醒的节能路由协议ERBSW（Energy-efficient Routing protocol Based on Spatial Wakeup），该协议将3维网络空间划分为唤醒层和睡眠层，每个节点根据当前的深度信息，动态地决定其处于唤醒或睡眠状态。另外，ERBSW通过定期地广播Hello包来建立唤醒邻节点集合，使得数据包由较高的唤醒层节点向较低的唤醒层节点传递，从而避免了冗余节点因空闲侦听以及不必要的数据接收所产生的能量浪费。仿真结果表明，在不同网络密度条件下，该协议相比VBF（Vector—Based Forwarding）能耗节省了约16％～48％。展开更多
针对现有的基于位置预测的目标跟踪算法还不完善问题,提出了一种新的基于目标位置预测的分布式无线传感器网络目标跟踪算法(location-based prediction,LBP)。LBP算法包括3部分,即基于自相似技术的目标位置预测算法(prediction based se...针对现有的基于位置预测的目标跟踪算法还不完善问题,提出了一种新的基于目标位置预测的分布式无线传感器网络目标跟踪算法(location-based prediction,LBP)。LBP算法包括3部分,即基于自相似技术的目标位置预测算法(prediction based self-si m-lar,PBSS)、基于动态唤醒簇(dynamic wakeup cluster,DWC)的目标跟踪和三级目标恢复机制。实验结果表明:LBP算法的目标预测精度高、跟踪过程中的节点能量消耗小、目标跟踪误差小,并且目标丢失率低;其三级目标跟踪恢复机制,通过逐步扩大激活节点的范围来寻找目标。由此可见采用这种方法,无线传感器网络跟踪目标能量消耗更小,目标丢失率更低。展开更多
A prediction based energy-efficient target tracking protocol in wireless sensor networks(PET) was proposed for tracking a mobile target in terms of sensing and communication energy consumption.In order to maximize the...A prediction based energy-efficient target tracking protocol in wireless sensor networks(PET) was proposed for tracking a mobile target in terms of sensing and communication energy consumption.In order to maximize the lifetime of a wireless sensor network(WSN),the volume of messages and the time for neighbor discovery operations were minimized.The target was followed in a special region known as a face obtained by planarization technique in face-aware routing.An election process was conducted to choose a minimal number of appropriate sensors that are the nearest to the target and a wakeup strategy was proposed to wakeup the appropriate sensors in advance to track the target.In addition,a tracking algorithm to track a target step by step was introduced.Performance analysis and simulation results show that the proposed protocol efficiently tracks a target in WSNs and outperforms some existing protocols of target tracking with energy saving under certain ideal situations.展开更多
In Wireless Sensor Network(WSN),because battery and energy supply are constraints,sleep scheduling is always needed to save energy while maintaining connectivity for packet delivery.Traditional schemes have to ensure ...In Wireless Sensor Network(WSN),because battery and energy supply are constraints,sleep scheduling is always needed to save energy while maintaining connectivity for packet delivery.Traditional schemes have to ensure high duty cycling to ensure enough percentage of active nodes and then derogate the energy efficiency.This paper proposes an RFID based non-preemptive random sleep scheduling scheme with stable low duty cycle.It employs delay tolerant network routing protocol to tackle the frequent disconnections.A low-power RFID based non-preemptive wakeup signal is used to confirm the availability of next-hop before sending packet.It eliminates energy consumption of repeated retransmission of the delayed packets.Moreover,the received wakeup signal is postponed to take effect until the sleep period is finished,and the waken node then responds to the sending node to start the packet delivery.The scheme can keep stable duty cycle and then ensure energy saving effect compared with other sleeping scheduling methods.展开更多
文摘针对水声传感器网络高能耗的特点，该文提出了基于空间唤醒的节能路由协议ERBSW（Energy-efficient Routing protocol Based on Spatial Wakeup），该协议将3维网络空间划分为唤醒层和睡眠层，每个节点根据当前的深度信息，动态地决定其处于唤醒或睡眠状态。另外，ERBSW通过定期地广播Hello包来建立唤醒邻节点集合，使得数据包由较高的唤醒层节点向较低的唤醒层节点传递，从而避免了冗余节点因空闲侦听以及不必要的数据接收所产生的能量浪费。仿真结果表明，在不同网络密度条件下，该协议相比VBF（Vector—Based Forwarding）能耗节省了约16％～48％。
基金Supported by the Aero Science and Technology Foundation of China under Grant No.05E551010the Key Subject Foundation of Beijing of China under Grant No.XK100060423the Graduate Practice and Innovation Foundation of BUAA of China under Grant No.2007.20~~
基金Project(07JJ1010) supported by the Hunan Provincial Natural Science Foundation, ChinaProject(NCET-06-0686) supported by Program for New Century Excellent Talents in UniversityProject(IRT0661) supported by Program for Changjiang Scholars and Innovative Research Team in University
文摘A prediction based energy-efficient target tracking protocol in wireless sensor networks(PET) was proposed for tracking a mobile target in terms of sensing and communication energy consumption.In order to maximize the lifetime of a wireless sensor network(WSN),the volume of messages and the time for neighbor discovery operations were minimized.The target was followed in a special region known as a face obtained by planarization technique in face-aware routing.An election process was conducted to choose a minimal number of appropriate sensors that are the nearest to the target and a wakeup strategy was proposed to wakeup the appropriate sensors in advance to track the target.In addition,a tracking algorithm to track a target step by step was introduced.Performance analysis and simulation results show that the proposed protocol efficiently tracks a target in WSNs and outperforms some existing protocols of target tracking with energy saving under certain ideal situations.
基金This work is supported in part by the National Natural Science Foundation of China(61871140,61572153,U1636215,61572492,61672020)the National Key research and Development Plan(Grant No.2018YFB0803504).
文摘In Wireless Sensor Network(WSN),because battery and energy supply are constraints,sleep scheduling is always needed to save energy while maintaining connectivity for packet delivery.Traditional schemes have to ensure high duty cycling to ensure enough percentage of active nodes and then derogate the energy efficiency.This paper proposes an RFID based non-preemptive random sleep scheduling scheme with stable low duty cycle.It employs delay tolerant network routing protocol to tackle the frequent disconnections.A low-power RFID based non-preemptive wakeup signal is used to confirm the availability of next-hop before sending packet.It eliminates energy consumption of repeated retransmission of the delayed packets.Moreover,the received wakeup signal is postponed to take effect until the sleep period is finished,and the waken node then responds to the sending node to start the packet delivery.The scheme can keep stable duty cycle and then ensure energy saving effect compared with other sleeping scheduling methods.
