共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
随着无线网络技术的日益成熟及其对小型、微型移动设备的支持,无线移动传感器网络已经逐渐成为一个研究的热点。主要讨论了为无线移动传感器网络设计的一个自适应的体系结构。在该体系结构中,使用了一个区域和核心路由节点相结合的多层结构的方法来增加无线移动网络的信息传输能力、可扩充性和可靠性,并降低网络的能耗,这样就可以适应无线移动网络的高度动态性和移动性。 相似文献
3.
随着无线网络技术的日益成熟及其对小型、微型移动设备的支持,无线移动传感器网络已经逐渐成为一个研究的热点。主要讨论了为无线移动传感器网络设计的一个自适应的体系结构。在该体系结构中,使用了一个区域和核心路由节点相结合的多层结构的方法来增加无线移动网络的信息传输能力、可扩充性和可靠性,并降低网络的能耗,这样就可以适应无线移动网络的高度动态性和移动性。 相似文献
4.
随着无线网络技术的日益成熟及其对小型、微型移动设备的支持,无线移动传感器网络已经逐渐成为一个研究的热点.主要讨论了为无线移动传感器网络设计的一个自适应的体系结构.在该体系结构中,使用了一个区域和核心路由节点相结合的多层结构的方法来增加无线移动网络的信息传输能力、可扩充性和可靠性,并降低网络的能耗,这样就可以适应无线移动网络的高度动态性和移动性. 相似文献
5.
6.
7.
8.
针对工业无线传感网络中物理层干扰攻击问题,研究一种移动环境下的博弈功率控制方案。为提高移动sink节点的抗干扰能力,利用Bayesion-Stackelberg博弈模拟移动sink节点和干扰节点的对抗交互行为,通过求出参与博弈的节点最优策略,即sink节点和干扰节点的最佳传输功率,达到合法节点抗干扰的最佳效果,提高通信系统物理层的安全性。Matlab仿真结果表明,相比移动sink节点的其他博弈功率控制算法,本文方案能更有效地提高合法节点抗干扰能力且能耗更低。 相似文献
9.
从进攻方的角度出发,该文研究目标如何以尽可能低的发现概率,消耗尽可能少的时间穿越已被传感器节点监控的区域。基于此研究目标,提出一种兼顾安全和时效性能的SS(Security and Speed)启发式的移动轨迹策略和相应的评价指标综合增益Integrated Gain (IG)。此策略无需全网拓扑信息的支持,能动态地反映目标对安全和时效两种性能的不同需求。通过仿真试验证明,该策略对网络中节点密度和分布有更低的敏感性;和经典的Voronoi算法相比,该策略克服Voronoi中存在的工作盲区和轨迹蔓延的问题,平均综合增益更加接近理想算法的结果,而计算复杂度却远远低于理想算法。 相似文献
10.
从进攻方的角度出发,该文研究目标如何以尽可能低的发现概率,消耗尽可能少的时间穿越已被传感器节点监控的区域。基于此研究目标,提出一种兼顾安全和时效性能的SS(Security and Speed)启发式的移动轨迹策略和相应的评价指标——综合增益Integrated Gain(IG)。此策略无需全网拓扑信息的支持,能动态地反映目标对安全和时效两种性能的不同需求。通过仿真试验证明,该策略对网络中节点密度和分布有更低的敏感性;和经典的Voronoi算法相比,该策略克服Voronoi中存在的工作盲区和轨迹蔓延的问题,平均综合增益更加接近理想算法的结果,而计算复杂度却远远低于理想算法。 相似文献
11.
12.
13.
针对传统的无线传感网络数据采集方法存在的能耗高、网络延迟时间长的问题,文章提出了一种基于移动机器人无线传感网络数据采集方法,此方法的基本思想是,首先选择一个合适的移动机器人作为族头,一定周期内的相邻节点的平均剩余能量会被移动机器人检测出来,同时整个网络节点的平均剩余能量也能被检测出来,移动机器人是否移动由这两个参数的大小决定的。随着机器人的移动,节点的路由也会相应的更新,然后重新选择移动机器人族头。测试结果表明,此方法能很好的降低传输延迟和节点能量消耗。 相似文献
14.
协同信息处理是无线传感器网络研究的难点。以跟踪单目标为基础,提出了一种基于对策论的协同机制,对网络节点建立群组方式进行目标跟踪,动态地分配任务,随时更新群组成员,同步信息整合与数据传递,在实验中让基于对策论与已有的基于实例的协同机制进行对比。实验结果证明,采用基于对策论方式进行目标跟踪准确率明显提高,网络能量消耗大幅度降低,信息传递流畅,满足了网络节点的动态扩展性与适应性。 相似文献
15.
A. S. Dmitriev E. V. Efremova A. V. Kletsov L. V. Kuz’min A. M. Laktyushkin V. Yu. Yurkin 《Journal of Communications Technology and Electronics》2008,53(10):1206-1216
An actively advancing branch of wireless ultrawideband communications is considered. Direct chaotic transceivers of two types are described. The transceivers were developed at the Institute of Radio Engineering and Electronics, Russian Academy of Sciences. Application of these transceivers in wireless sensor networks is demonstrated. 相似文献
16.
Sequential Monte Carlo localization in mobile sensor networks 总被引:1,自引:0,他引:1
Node localization in wireless sensor networks is essential to many applications such as routing protocol, target tracking
and environment surveillance. Many localization schemes have been proposed in the past few years and they can be classified
into two categories: range-based and range-free. Since range-based techniques need special hardware, which increases the localization cost, many researchers now focus on
the range-free techniques. However, most of the range-free localization schemes assume that the sensor nodes are static, the
network topology is known in advance, and the radio propagation is perfect circle. Moreover, many schemes need densely distributed
anchor nodes whose positions are known in advance in order to estimate the positions of the unknown nodes. These assumptions
are not practical in real network. In this paper, we consider the sensor networks with sparse anchor nodes and irregular radio
propagation. Based on Sequential Monte Carlo method, we propose an alterative localization method—Sequential Monte Carlo Localization
scheme (SMCL). Unlike many previously proposed methods, our work takes the probabilistic approach, which is suitable for the
mobile sensor networks because both anchors and unknown nodes can move, and the network topology need not be formed beforehand.
Moreover, our algorithm is scalable and can be used in large-scale sensor networks. Simulation results show that SMCL has
better localization accuracy and it can localize more sensor nodes when the anchor density is low. The communication overhead
of SMCL is also lower than other localization algorithms.
相似文献
Qingxin ZhuEmail: |
17.
自从数字移动通信网以前所未有的穿透力进入移动通信市场以来,人们对无线个人通信(wireless per—sonal communications)的要求与日俱增。这也正是目前无线通信成为工业界主要焦点的源动力之一。随即,互联网的盛行促进了无线用户对高速数据传输的需求,据预测,无线高速多媒体的时代已不遥远。由此,我们可以在展望无线网发展的巨大潜力的同时,也意识到高用户量、高数据传输量和多种业务并存给未来无线网络带来的潜在挑战。解决这一问题不仅需要一流的设备,而且需要一流的无线资源管理技术。 目前国际… 相似文献
18.
A precise localization for mobile target in wireless sensor networks is presented in this letter,where a geometrical relationship is explored to improve the location estimation for mobile target,instead of a simple centroid approach.The equations of location compensation algorithm for mobile target are derived based on linear trajectory prediction and sensor selective activation.The results based on extensive simulation experiments show that the compensation algorithm gets better performance in metrics of quality of tracking and energy efficiency with the change of sensor sensing range,the ratio of sensing range and sensor activation range,and the data sampling rate than traditional methods,which means our proposing can achieve better quality-energy tradeoff for mobile target in wireless sensor networks. 相似文献
19.
Wireless Networks - Barrier coverage is an important problem in wireless camera sensor networks for many security applications such as border monitoring and target detection, where camera sensors... 相似文献
20.
Jingliang Chen Vasyl Yatskiv Anatoly Sachenko Jun Su 《Radioelectronics and Communications Systems》2017,60(5):215-224
The authors propose the method for data coding in wireless sensor networks (WSN) based on the transformation of the residue number system and multipath routing. It enables to utilize efficiently the bandwidth of communication channels as well as reduce message delivery time. It is explored the ant algorithm to search an optimal route of data transmission in the wireless sensor network. There is introduced a limitation for the communication radius of the wireless unit that shorts a number of the search decision modes and improves the accuracy of the wireless network simulation. The correspondent software is designed, it allowes exploring the dynamics of finding the optimal transmission path in WSN in case of different algorithm settings, and exploring the impact of the elite ants on the accuracy of the found path. 相似文献