【作者】 贺抗生；

【导师】 邝继顺；

【作者基本信息】 湖南大学 ， 通信与信息系统， 2008， 硕士

【摘要】 近年来,无线传感网络已成为一个热门研究课题。他们有巨大的长期经济潜力,有能力改变我们的生活,并带来许多新体制建设的挑战。传感器网络还引起大量的新概念和优化方面的问题。诸如定位、部署和跟踪,这些问题,很大程度上都是依靠他们来获得所需要的信息。传感器网络发展至今,仍有许多可以应用的环境待开发,也仍有许多技术问题需要克服,值得各界学者及研究团队继续深入地研究。覆盖调度机制作为无线传感器网络中的一个基本问题,反映了网络所能提供的“感知”服务质量,可以使无线传感器网络的空间资源得到优化分配,进而更好地完成环境感知、信息获取和有效传输的任务。要保障整体信息的完整性,节点首先要判定该感兴趣的区域是否被一组给定的传感器节点覆盖,因此,对传感器网络中的覆盖调度机制问题进行深入研究具有重要意义。本文讨论了传感器网络的覆盖问题。覆盖是衡量传感器网络工作性能的重要指标之一,通过对覆盖问题的研究可以寻求提高传感器网络服务质量的方法。本文研究了传感器网络的覆盖调度机制,已有的固定概率调度模型调度概率不能随网络的运行得到更新,这样会导致性能下降,不具有扩展性和适应性,邻居信息指导的概率模型在网络密度很大的情况下节点睡眠概率太大,网络覆盖率会急剧下降。本文在分析已有固定概率模型和邻居信息指导的概率模型的基础上,提出了一种基于能量和邻居信息指导的概率调度模型。传感器节点根据自身的能量以及邻居节点的数量来决定自己在每一轮中的睡眠概率,使自身能量小,活跃邻居节点多的节点具有较高的睡眠概率,达到延缓传感器节点死亡时间的目的。另外,本文分析了一种分布式的与位置无关的传感器网络覆盖协议,并对其做出了改进。仿真实验的结果表明,改进的协议具有较好的性能。最后,本文简要介绍了传感器网络仿真算法的设计与实现。更多还原

【Abstract】 Wireless sensor networks have recently emerged as a premier research topic. They have great long-term economic potential, ability to transform our lives, and pose many new system-building challenges. Sensor networks also pose a number of new conceptual and optimization problems. Some, such as location, deployment, and tracking, are fundamental issues, in that many applications rely on them for needed information. Today, there are still many application cases can be designed, and many questions needed to be covered. It calls for the researchers to research deeply.Cover scheduling protocol is one of the key guideline for evaluating the sensor networks work performance. It provide a detailed statement about the network Quality and service. It can improve the allocation of the network source, and then perceive the environment, obtain information efficiently, and effective transfer. To ensuring the information completely, the node should decide the area is coved or not firstly. So, researching Cover scheduling protocol is very important.Cover scheduling protocol is research deeply in this paper. Regular probability model can not renew its probability as the network moving, like this will lead to performance drop, and has not expansibility. Neighbor nodes advising- probability model also has limitation, with increasing of the net work density, coverage of the network will decrease sharply. This paper analysis regular probability model and neighbor nodes advising- probability model, and then put forward a new protocol based on node energy and its neighbor information. Nodes adjust its sleeping probability according to its own energy and neighbor information. Let those nodes have high energy and more living neighbor nodes to sleep easily, to prolong the lifetime of the network.Furthermore, this paper analysis a distributed and location indifferent sensor net work cover protocol, and then improved it. The next lab indicate that the protocol has good ability. At last this paper introduces the lab platform and its designing process, this platform provide a lab environment.更多还原