面向可靠性的无线传感网分布式能量意识拓扑优化算法研究

发布时间：2018-07-17 06:19

【摘要】：无线通信和现代网络等技术的进步,推动了无线传感器网络(Wireless Sensor Network, WSN)的产生和发展,使其在环境监测及预报、健康护理和智能家居等各个领域具有广泛的应用。与有线传感器网络不同的是,WSN具有大规模、自组织、拓扑结构动态变化、能量有限且不可补充等特点。又因为它容易受到温度、湿度、障碍物等的影响造成衰减、多径、盲区,致使数据传输产生丢包、重传等现象。所以这就要求网络在许多应用场合要确保其能量有效利用且数据可靠传输。考虑到优化的拓扑结构可以节约网络能量,确保数据可靠传输,本课题通过分析和总结已有的可靠拓扑模型,针对WSN在可靠性和节能方面研究的不足之处,提出相应研究内容,具体有：(1)总结了无线传感器网络拓扑优化算法的研究现状,基于实际应用环境分析出可靠性对于增强网络的适应性及推动网络的应用具有非常重要的意义,因此针对网络可靠性能从链路稳定和能量均衡两方面来分析可靠拓扑模型。为本课题设计面向可靠性的无线传感网分布式能量意识拓扑优化算法奠定了基础。(2)考虑到真实环境中的非对称链路会造成信号传输失败,利用链路质量预测的方法,建立面向链路稳定的通信可靠模型。并以此模型为基础,根据分布式算法的优势,设计了基于通信可靠模型的WSN分布式拓扑优化算法。该算法可以建立双向连通的拓扑结构,并通过仿真验证了其具有提高网络通信可靠性、降低网络能耗和延长网络生命期的性能。(3)数据能够成功传输是建立在拓扑可靠基础上的,并且节点被孤立等因素使得节点实际传输信息的时间与节点耗尽能量的时间不一致,因此分别建立拓扑可靠模型和链路实际生存时间模型。然后以此为基础提出面向通信可靠与能量均衡的WSN拓扑优化模型,并设计了相应的拓扑优化算法。理论分析和仿真结果表明该算法不仅能提高网络可靠性,而且延长了网络传输信息的时间。
[Abstract]:The development of wireless sensor network (WSN) has been promoted by the development of wireless communication and modern network technology. It has been widely used in many fields such as environmental monitoring and forecasting, health care and smart home. Different from wired sensor networks, WSN has the characteristics of large scale, self-organization, dynamic change of topological structure, limited energy and can not be replenished. Because it is easy to be affected by temperature, humidity, obstacles and so on, it causes attenuation, multi-path, blind area, resulting in data transmission, such as packet loss, retransmission and so on. Therefore, it is necessary for the network to ensure the efficient use of its energy and reliable transmission of data in many applications. Considering that the optimized topology structure can save network energy and ensure the reliable transmission of data, this paper analyzes and summarizes the existing reliable topology models, aiming at the shortcomings of the research on the reliability and energy saving of WSN, puts forward the corresponding research content. The main contents are as follows: (1) the research status of wireless sensor network topology optimization algorithm is summarized. It is very important to analyze the reliability for enhancing the adaptability of the network and promoting the application of the network based on the actual application environment. Therefore, the reliable topology model is analyzed in terms of link stability and energy balance for network reliability performance. It lays a foundation for the design of a reliability-oriented distributed energy awareness topology optimization algorithm for wireless sensor networks. (2) considering that asymmetric links in real environment will cause signal transmission failure, the method of link quality prediction is used. A reliable communication model for link stability is established. Based on this model, the distributed topology optimization algorithm of WSN based on reliable communication model is designed according to the advantages of distributed algorithm. The algorithm can establish a bidirectional connected topology, and the simulation results show that the algorithm can improve the network communication reliability, reduce the network energy consumption and prolong the network lifetime. (3) the data can be successfully transmitted on the basis of topology reliability. The isolation of nodes makes the time of the actual transmission of information inconsistent with the time of energy depletion, so the topology reliability model and the link real life time model are established respectively. Then, a new topology optimization model for WSN based on communication reliability and energy balance is proposed, and the corresponding topology optimization algorithm is designed. Theoretical analysis and simulation results show that the proposed algorithm can not only improve the network reliability, but also prolong the time of network transmission.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP212.9;TN929.5
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本文编号：2129373