路由协议能实现认知无线传感器网络(CRSN, cognitive radio sensor network)内部感知数据的有效汇聚传输,尤其是分簇路由协议能进一步降低路由选择的复杂度、提升网络可扩展性,对整体网络性能至关重要。因此,针对CRSN分簇路由协议进行...路由协议能实现认知无线传感器网络(CRSN, cognitive radio sensor network)内部感知数据的有效汇聚传输,尤其是分簇路由协议能进一步降低路由选择的复杂度、提升网络可扩展性,对整体网络性能至关重要。因此,针对CRSN分簇路由协议进行综述研究。首先,在简要介绍CRSN分簇概念和优势的基础上,阐述CRSN分簇算法设计考虑的主要因素。其次,探讨CRSN分簇路由协议设计面临的挑战及应遵循的基本设计原则。再次,系统的分析和总结CRSN分簇路由协议的研究现状。最后,指出CRSN分簇路由协议研究中亟待解决的问题及未来的研究方向。展开更多
将认知无线电中的动态频谱分配技术应用在无线传感网中,针对工作在ISM(industrial,scientific and medical)频段的无线传感网面临的频谱资源紧缺问题,提出一种基于改进自适应遗传算法的动态频谱分配方案。该算法以图论着色模型为基础,...将认知无线电中的动态频谱分配技术应用在无线传感网中,针对工作在ISM(industrial,scientific and medical)频段的无线传感网面临的频谱资源紧缺问题,提出一种基于改进自适应遗传算法的动态频谱分配方案。该算法以图论着色模型为基础,以最大带宽收益和最小切换频率为目标函数,在交叉和变异过程中采用自适应交叉概率和变异概率代替固定的交叉概率和变异概率。仿真结果表明,与传统遗传算法和颜色敏感图论着色算法相比,该算法可以实现提高频谱利用率、降低能量消耗的预期目标。展开更多
在实际的无线环境中,阴影和衰落的影响会导致传感节点接收到的信号具有不同的特征。因此,深度衰落中的一些协作节点会出现严重的漏检,这将影响融合操作的最终结果。针对上述问题,提出一种基于熵权法的认知无线传感网(cognitive radio se...在实际的无线环境中,阴影和衰落的影响会导致传感节点接收到的信号具有不同的特征。因此,深度衰落中的一些协作节点会出现严重的漏检,这将影响融合操作的最终结果。针对上述问题,提出一种基于熵权法的认知无线传感网(cognitive radio sensor network,CRSN)软决策协作频谱感知方法。该方法将传感器节点组织成逻辑组,以获得能源效率和传感性能的提高,在接收到来自所有成员节点的软传感信息后,簇头采用等增益的软融合来进行簇间融合,然后将局部决策转发给融合中心,在最终决策过程中,采用熵权法为相应的聚类局部决策分配最优权值。仿真结果表明,该方法检测概率和总误差概率方面均优于典型的协作频谱感知分簇方案。展开更多
As a smart combination of cognitive radio networks and wireless sensor networks,recently introduced cognitive radio sensor network(CRSN) poses new challenges to the design of topology maintenance techniques for dynami...As a smart combination of cognitive radio networks and wireless sensor networks,recently introduced cognitive radio sensor network(CRSN) poses new challenges to the design of topology maintenance techniques for dynamic primary-user activities.This paper aims to provide a solution to the energy-efficient spectrum-aware CRSN clustering problem.Specifically,we design the clustered structure,establish a network-wide energy consumption model and determine the optimal number of clusters.We then employ the ideas from constrained clustering and propose both a centralized spectrum-aware clustering algorithm and a distributed spectrum-aware clustering(DSAC) protocol.Through extensive simulations,we demonstrate that DSAC can effectively form clusters under a dynamic spectrum-aware constraint.Moreover,DSAC exhibits preferable scalability and stability with its low complexity and quick convergence under dynamic spectrum variation.展开更多
Usefulness of sensor network applications in human life is increasing day by day and the concept of wireless connection promises new application areas. Sensor network can be very beneficial in saving human life from t...Usefulness of sensor network applications in human life is increasing day by day and the concept of wireless connection promises new application areas. Sensor network can be very beneficial in saving human life from terrorist attacks causing explosion in certain areas leading to casualties. But realization of the sensor network application in explosive detection requires high scalability of the sensor network and fast transmission of the information through real time monitoring and control. In this paper a novel mechanism for explosive trace detection in any populated area by the use of mobile telephony has been described. The aim is to create a system that will assure common men, local population and above all the nation a secured environment, without disturbing their freedom of movement. It would further help the police in detection of explosives more quickly, isolation of suicide bombers, remediation of explosives manufacturing sites, and forensic and criminal investigation. To achieve this, the paper has projected an idea that can combine the strength of the mobile phones, the polymer sensor and existing cellular network. The idea is to design and embed a tiny cog-nitive radio sensor node into the mobile phone that adapts to the changing environment by analyzing the RF surroundings and adjusting the spectrum use appropriately. The system would be capable of detecting explo-sives within a defined territory. It would communicate the location of the detected explosives to the respec-tive service provider, which in turn would inform the law and enforcement agency or Police.展开更多
文摘路由协议能实现认知无线传感器网络(CRSN, cognitive radio sensor network)内部感知数据的有效汇聚传输,尤其是分簇路由协议能进一步降低路由选择的复杂度、提升网络可扩展性,对整体网络性能至关重要。因此,针对CRSN分簇路由协议进行综述研究。首先,在简要介绍CRSN分簇概念和优势的基础上,阐述CRSN分簇算法设计考虑的主要因素。其次,探讨CRSN分簇路由协议设计面临的挑战及应遵循的基本设计原则。再次,系统的分析和总结CRSN分簇路由协议的研究现状。最后,指出CRSN分簇路由协议研究中亟待解决的问题及未来的研究方向。
文摘将认知无线电中的动态频谱分配技术应用在无线传感网中,针对工作在ISM(industrial,scientific and medical)频段的无线传感网面临的频谱资源紧缺问题,提出一种基于改进自适应遗传算法的动态频谱分配方案。该算法以图论着色模型为基础,以最大带宽收益和最小切换频率为目标函数,在交叉和变异过程中采用自适应交叉概率和变异概率代替固定的交叉概率和变异概率。仿真结果表明,与传统遗传算法和颜色敏感图论着色算法相比,该算法可以实现提高频谱利用率、降低能量消耗的预期目标。
文摘在实际的无线环境中,阴影和衰落的影响会导致传感节点接收到的信号具有不同的特征。因此,深度衰落中的一些协作节点会出现严重的漏检,这将影响融合操作的最终结果。针对上述问题,提出一种基于熵权法的认知无线传感网(cognitive radio sensor network,CRSN)软决策协作频谱感知方法。该方法将传感器节点组织成逻辑组,以获得能源效率和传感性能的提高,在接收到来自所有成员节点的软传感信息后,簇头采用等增益的软融合来进行簇间融合,然后将局部决策转发给融合中心,在最终决策过程中,采用熵权法为相应的聚类局部决策分配最优权值。仿真结果表明,该方法检测概率和总误差概率方面均优于典型的协作频谱感知分簇方案。
基金supported by the National Basic Research Program of China (2009CB320405 and 2012CB316104)the National Natural Science Foundation of China (60972057)the Supporting Program for New Century Excellent Talents in Universities (NCET-09-0701)
文摘As a smart combination of cognitive radio networks and wireless sensor networks,recently introduced cognitive radio sensor network(CRSN) poses new challenges to the design of topology maintenance techniques for dynamic primary-user activities.This paper aims to provide a solution to the energy-efficient spectrum-aware CRSN clustering problem.Specifically,we design the clustered structure,establish a network-wide energy consumption model and determine the optimal number of clusters.We then employ the ideas from constrained clustering and propose both a centralized spectrum-aware clustering algorithm and a distributed spectrum-aware clustering(DSAC) protocol.Through extensive simulations,we demonstrate that DSAC can effectively form clusters under a dynamic spectrum-aware constraint.Moreover,DSAC exhibits preferable scalability and stability with its low complexity and quick convergence under dynamic spectrum variation.
文摘Usefulness of sensor network applications in human life is increasing day by day and the concept of wireless connection promises new application areas. Sensor network can be very beneficial in saving human life from terrorist attacks causing explosion in certain areas leading to casualties. But realization of the sensor network application in explosive detection requires high scalability of the sensor network and fast transmission of the information through real time monitoring and control. In this paper a novel mechanism for explosive trace detection in any populated area by the use of mobile telephony has been described. The aim is to create a system that will assure common men, local population and above all the nation a secured environment, without disturbing their freedom of movement. It would further help the police in detection of explosives more quickly, isolation of suicide bombers, remediation of explosives manufacturing sites, and forensic and criminal investigation. To achieve this, the paper has projected an idea that can combine the strength of the mobile phones, the polymer sensor and existing cellular network. The idea is to design and embed a tiny cog-nitive radio sensor node into the mobile phone that adapts to the changing environment by analyzing the RF surroundings and adjusting the spectrum use appropriately. The system would be capable of detecting explo-sives within a defined territory. It would communicate the location of the detected explosives to the respec-tive service provider, which in turn would inform the law and enforcement agency or Police.
