In recent years, target tracking has been considered one of the most important applications of wireless sensornetwork (WSN). Optimizing target tracking performance and prolonging network lifetime are two equally criti...In recent years, target tracking has been considered one of the most important applications of wireless sensornetwork (WSN). Optimizing target tracking performance and prolonging network lifetime are two equally criticalobjectives in this scenario. The existing mechanisms still have weaknesses in balancing the two demands. Theproposed heuristic multi-node collaborative scheduling mechanism (HMNCS) comprises cluster head (CH)election, pre-selection, and task set selectionmechanisms, where the latter two kinds of selections forma two-layerselection mechanism. The CH election innovatively introduces the movement trend of the target and establishesa scoring mechanism to determine the optimal CH, which can delay the CH rotation and thus reduce energyconsumption. The pre-selection mechanism adaptively filters out suitable nodes as the candidate task set to applyfor tracking tasks, which can reduce the application consumption and the overhead of the following task setselection. Finally, the task node selection is mathematically transformed into an optimization problem and thegenetic algorithm is adopted to form a final task set in the task set selection mechanism. Simulation results showthat HMNCS outperforms other compared mechanisms in the tracking accuracy and the network lifetime.展开更多
Aiming at developing a node scheduling protocol for sensor networks with fewer active nodes,we propose a coordinated node scheduling protocol based on the presentation of a solution and its optimization to determine w...Aiming at developing a node scheduling protocol for sensor networks with fewer active nodes,we propose a coordinated node scheduling protocol based on the presentation of a solution and its optimization to determine whether a node is redundant.The proposed protocol can reduce the number of working nodes by turning off as many redundant nodes as possible without degrading the coverage and connectivity.The simulation result shows that our protocol outperforms the peer with respect to the working node number and dynamic coverage percentage.展开更多
远距离无线电(Long Range Radio,LoRa)技术以其低功耗、长距离传输以及抗干扰性强等优势,在工业无线通信网络中得到广泛应用。为进一步提升LoRa网络性能和资源利用率,多重覆盖节点调度策略成为关键。文章分析了LoRa技术原理,深入研究工...远距离无线电(Long Range Radio,LoRa)技术以其低功耗、长距离传输以及抗干扰性强等优势,在工业无线通信网络中得到广泛应用。为进一步提升LoRa网络性能和资源利用率,多重覆盖节点调度策略成为关键。文章分析了LoRa技术原理,深入研究工业无线通信网络多重覆盖节点调度,包括多重覆盖冗余度判别和数学模型构建。经过仿真实验,验证了所提算法的有效性,其在覆盖率、能耗以及网络寿命等方面均优于传统方法,具备较高的应用价值。展开更多
With the fast development of the micro-electro-mechanical systems （MEMS）,wireless sensor networks （WSNs） have been extensively studied.Most of the studies focus on saving energy consumption because of restricted e...With the fast development of the micro-electro-mechanical systems （MEMS）,wireless sensor networks （WSNs） have been extensively studied.Most of the studies focus on saving energy consumption because of restricted energy supply in WSNs.Cluster-based node scheduling scheme is commonly considered as one of the most energy-efficient approaches.However,it is not always so efficient especially when there exist hot spot and network attacks in WSNs.In this article,a secure coverage-preserved node scheduling scheme for WSNs based on energy prediction is proposed in an uneven deployment environment.The scheme is comprised of an uneven clustering algorithm based on arithmetic progression,a cover set partition algorithm based on trust and a node scheduling algorithm based on energy prediction.Simulation results show that network lifetime of the scheme is 350 rounds longer than that of other scheduling algorithms.Furthermore,the scheme can keep a high network coverage ratio during the network lifetime and achieve the designed objective which makes energy dissipation of most nodes in WSNs balanced.展开更多
A scheduling algorithm for the edge nodes of optical burst switching (OBS) networks is proposed to guarantee the delay requirement of services with different CoS (Class of Service) and provide lower burst loss ratio a...A scheduling algorithm for the edge nodes of optical burst switching (OBS) networks is proposed to guarantee the delay requirement of services with different CoS (Class of Service) and provide lower burst loss ratio at the same time. The performance of edge nodes based on the proposed algorithm is presented.展开更多
目前研究人员针对雾计算环境中的任务调度问题已经展开了研究并取得了一定成果,但是仍然存在不足。当前研究在任务调度中着重考虑了用户对低时延的需求,而未能针对用户的多维服务质量(Quality of Service,简称QoS)需求进行优化。事实上...目前研究人员针对雾计算环境中的任务调度问题已经展开了研究并取得了一定成果,但是仍然存在不足。当前研究在任务调度中着重考虑了用户对低时延的需求,而未能针对用户的多维服务质量(Quality of Service,简称QoS)需求进行优化。事实上用户在使用雾端资源节点处理任务请求时对时延、安全性、可靠性等方面均有需求。因此,文章将对目前研究中存在的不足展开讨论,提出基于多维QoS约束的任务调度算法,该算法考虑了用户的多维QoS需求。展开更多
基金the Project Program of Science and Technology on Micro-System Laboratory,No.6142804220101.
文摘In recent years, target tracking has been considered one of the most important applications of wireless sensornetwork (WSN). Optimizing target tracking performance and prolonging network lifetime are two equally criticalobjectives in this scenario. The existing mechanisms still have weaknesses in balancing the two demands. Theproposed heuristic multi-node collaborative scheduling mechanism (HMNCS) comprises cluster head (CH)election, pre-selection, and task set selectionmechanisms, where the latter two kinds of selections forma two-layerselection mechanism. The CH election innovatively introduces the movement trend of the target and establishesa scoring mechanism to determine the optimal CH, which can delay the CH rotation and thus reduce energyconsumption. The pre-selection mechanism adaptively filters out suitable nodes as the candidate task set to applyfor tracking tasks, which can reduce the application consumption and the overhead of the following task setselection. Finally, the task node selection is mathematically transformed into an optimization problem and thegenetic algorithm is adopted to form a final task set in the task set selection mechanism. Simulation results showthat HMNCS outperforms other compared mechanisms in the tracking accuracy and the network lifetime.
基金the National Natural Science Foundation of China(Grant No.60533110 and No.90604013)the Scientific Research Foundation of Harbin Institute of Technology(Grant No. HIT2002.74)
文摘Aiming at developing a node scheduling protocol for sensor networks with fewer active nodes,we propose a coordinated node scheduling protocol based on the presentation of a solution and its optimization to determine whether a node is redundant.The proposed protocol can reduce the number of working nodes by turning off as many redundant nodes as possible without degrading the coverage and connectivity.The simulation result shows that our protocol outperforms the peer with respect to the working node number and dynamic coverage percentage.
文摘远距离无线电(Long Range Radio,LoRa)技术以其低功耗、长距离传输以及抗干扰性强等优势,在工业无线通信网络中得到广泛应用。为进一步提升LoRa网络性能和资源利用率,多重覆盖节点调度策略成为关键。文章分析了LoRa技术原理,深入研究工业无线通信网络多重覆盖节点调度,包括多重覆盖冗余度判别和数学模型构建。经过仿真实验,验证了所提算法的有效性,其在覆盖率、能耗以及网络寿命等方面均优于传统方法,具备较高的应用价值。
基金supported by the National Natural Science Foundation of China (60973139, 60773041)the Natural Science Foundation of Jiangsu Province (BK2008451)+2 种基金Special Fund for Software Technology of Jiangsu Province, Postdoctoral Foundation (0801019C, 20090451240, 20090451-241)Science & Technology Innovation Fund for higher education institutions of Jiangsu Province (CX09B_153Z, CX08B-086Z)the six kinds of Top Talent of Jiangsu Province (2008118)
文摘With the fast development of the micro-electro-mechanical systems （MEMS）,wireless sensor networks （WSNs） have been extensively studied.Most of the studies focus on saving energy consumption because of restricted energy supply in WSNs.Cluster-based node scheduling scheme is commonly considered as one of the most energy-efficient approaches.However,it is not always so efficient especially when there exist hot spot and network attacks in WSNs.In this article,a secure coverage-preserved node scheduling scheme for WSNs based on energy prediction is proposed in an uneven deployment environment.The scheme is comprised of an uneven clustering algorithm based on arithmetic progression,a cover set partition algorithm based on trust and a node scheduling algorithm based on energy prediction.Simulation results show that network lifetime of the scheme is 350 rounds longer than that of other scheduling algorithms.Furthermore,the scheme can keep a high network coverage ratio during the network lifetime and achieve the designed objective which makes energy dissipation of most nodes in WSNs balanced.
文摘A scheduling algorithm for the edge nodes of optical burst switching (OBS) networks is proposed to guarantee the delay requirement of services with different CoS (Class of Service) and provide lower burst loss ratio at the same time. The performance of edge nodes based on the proposed algorithm is presented.
文摘目前研究人员针对雾计算环境中的任务调度问题已经展开了研究并取得了一定成果,但是仍然存在不足。当前研究在任务调度中着重考虑了用户对低时延的需求,而未能针对用户的多维服务质量(Quality of Service,简称QoS)需求进行优化。事实上用户在使用雾端资源节点处理任务请求时对时延、安全性、可靠性等方面均有需求。因此,文章将对目前研究中存在的不足展开讨论,提出基于多维QoS约束的任务调度算法,该算法考虑了用户的多维QoS需求。
