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带AUVS水下传感器网络研究
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摘要
无线传感器网络在当今民用和军用中都起着重大作用,并且引起了国内外的高度重视。随着人们对海洋的研究以及开发,水下传感器网络在海洋信息收集,航道检测,渔业资源调查,矿业资源勘测,特别是国家安全等方面已经发挥着重要作用.同时传感器节点携带能量小,功率低,能量消耗大,生命周期短,这给研究带来巨大挑战,但也提供了广大的研究空间。这样在寻求通信协议改进的同时也需要对通信方式的调整,而引入AUVS可以节省能量的使用。
     文章借鉴陆地带移动收集节点的思想,并在现有国内外研究工作基础上,较深入地研究了带AUVS的水下传感器网络。分析了AUVS,节点,AUVS之间协调工作,采样方法,收集策略等众多组网要素;给出了用于文章仿真的包结构和信令单元;对于AUVS,分析其运动速度问题,运动轨迹给出原则,AUVS数量大小以及AUVS收集策略方案;借鉴矢量传感器指向较强的基本技术,给出对于传感器硬件要求比较高的全向采样,定向收集优化方案;考虑到网络节点密集度比较大,对同一事件均有信息收集时,过多冗余信息所带来的网络问题,给出了概率收集模型;水下多AUVS进行收集时,为了协调好AUVS彼此的工作,避免对于“共享”节点重复收集,给出了不同需要下的基本原则。
     文章研究了较新颖的带AUVS的组网方案,这种组网方式可以简化网络结构,扩大运用范围;通过优化水下传感器网络性能,经过仿真,证明优化方案能减少了节点能量消耗,增加了网络寿命。
With the wide application in both civilian and military domains, wireless sensor network (WSN) has been highly focused on home and abroad. The advanced research and development on underwater sensor networks (UWSN) have played a vital role in the marine information collection, channel detection, investigation of fishery resources, and exploration of mineral resources, especially the national security. Therefore, the study of underwater sensor networks is a very meaningful task.
     As the sensor nodes contains low energy, works in low power, have large overall energy consumption and short life, which bring great challenges to the researchers, but also provide vast space to be researched on. It is essentially to improve the communication protocols at the same time to adjust the means of communication.
     This paper makes reference to the ideology of terrestrial sensor network, and the existing latest research work, which leads to my in-depth study of the underwater sensors with AUVS. This paper focuses on the performance of the underwater network with AUVS,and brings forward the adjustment to the placement of the nodes, which results in some improvement on performance of the entire networks. After simulation, it proves a good future.
     This paper completes the following specific tasks: abandons underwater speed of sound transmission line model, uses in shallow water with the actual linear velocity model that is used in simulation and analysis of the AUVS, node, AUVS coordination, sampling methods, collecting strategies. And this paper brought forward the needed package and signaling units for simulating. As for AUVS, we designed the movement of speed limits and the principle of collecting the different trajectories, and the number of AUVS. At the same time, it solves the "share" node problem caused by multi-AUVS which brings multi-time collection, which avoids a repeat of the receiving unnecessary energy consumption. Taking into account the intensity of the network nodes comparison, the same incidents are information-gathering, information carried by too many redundant to the network, but a higher demand on the hardware is needed. This paper also builds a probabilistic model of the collection and sending data, to the performance of sensor networks which brings improvements in performance.
     The research of this thesis optimized the underwater sensor networks to certain extend, especially, advanced research on newly network structure, with AUVS. It can expedite the underwater exploration and research。
引文
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