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特定环境下移动传感网的数据路由算法研究

作者:优质期刊论文发表网  来源:www.yzqkw.com  发布时间:2019/10/10 9:33:29  

摘要:移动传感网是无线传感网(Wireless Sensor Network,WSN)的一个重要分支。在军事、智能交通环境监控和医疗卫生等领域中有着重要的应用。目前,许多学者研究移动传感网数据路由算法,也取得了一定的成果,但是大多数学者侧重于研究常规环境下的数据路由算法,在特定环境下研究较少且存在一些问题,本文选择交通网络环境和救灾网络环境分别来研究密集网络环境下移动传感网数据路由算法和稀疏网络环境下数据路由算法。分别在两种特定环境下提出相应的数据路由算法,本文研究内容为以下三方面:

(1)研究密集网络环境下移动传感网数据路由算法。为了减少数据传输的干扰,提高数据传输的效率和扩散速度,提出一种基于信道切换的车联网数据传输算法(DTA)。DTA算法考虑由车辆节点、中继节点和汇聚节点组成的三层网络,根据车辆的行驶方向进行节点的分类,提出不同的信道分配和切换机制,减少了数据传输的干扰。提出中继节点信息的快速扩散方法,将车辆节点的信息快速扩散到其他车辆节点。提出紧急路况信息的优先传输方法,采用不同的队列将数据分类,并根据队列优先级选择传输数据。

(2)研究稀疏网络环境下移动传感网数据路由算法。为了克服稀疏无线传感网下节点移动导致的网络分裂和提高数据传输效率,提出一种移动无线传感网的移动感知数据路由算法(MSDR)。在MSDR算法中,提出移动传感节点的路由期望值计算公式和汇聚树构建方法。如果移动传感节点寻找到Sink节点的路径时,通过多跳的方式发送给数据汇聚站,否则分析存在的两种情况(是否获知Sink节点位置),提出不同的传输概率计算公式。

(3)利用MATLAB搭建实验平台,并在实验平台上对本文提出的算法和对比算法进行实现,并对数据进行分析和总结。通过仿真分析表明,DTA算法能够有效实现有用信息的快速传输,减少不必要的损耗,提高汇聚节点数据接收率,降低数据包平均跳数和提高数据传输的覆盖率。在一定的条件下,DTA算法比AODV算法和AODV-L算法更优,可适用于快速变化的车辆行驶环境。MSDR算法可提高Sink节点数据接收率,降低节点平均能耗、节点剩余能量方差、节点平均丢包率和节点数据存储量方差。在一定条件下,MSDR算法比AODV-M算法和RASeR算法更优。

Mobile sensor network is an importantbranch of wireless sensor network. It importantly applied in military,intelligent transportation, environmental monitoring, medical and healthcarefields. At present, many scholars studied the data routing algorithms of mobilesensor networks and got some achievements. However, most scholars focus on thedata routing algorithms in the conventional environment, while few research inspecific environments and there are some problems. The traffic networkenvironment and the disaster relief network environment are separately selectedto study the data routing algorithm of the mobile sensor network in densenetwork environment and sparse network environment. The corresponding datarouting algorithms are proposed in two specific environments. The researchcontent of this paper is as follows:

(1) Research on data routing algorithm ofmobile sensor network in dense network environment. In order to reduce theinterference of data transmission and improve the efficiency and diffusionspeed , a data transmission algorithm of vehicle ad hoc network based onchannel switching (DTA) is proposed. The DTA considers a three-layer networkconsisting of the vehicle nodes, the relay nodes and the sink nodes. The nodesare classified according to the direction of travel of the vehicle. differentchannel allocation and the switching mechanisms are proposed to reduce theinterference of data transmission. A fast diffusion method of relay nodeinformation is proposed to rapidly spread information of vehicle nodes to othervehicle nodes. A priority transmission method for emergency road conditioninformation is proposed, which uses different queues to classify data and selectstransmission data according to queue priority.

(2) Research on data routing algorithm ofmobile sensor network in sparse network environment. In order to overcome thenetwork splitting caused by the node movement under the sparse wireless sensornetwork and improve the data transmission efficiency, a mobile sensing datarouting algorithm for mobile wireless sensor networks (MSDR) is proposed. Inthe MSDR, the route expectation value calculation formula and the convergencetree construction method of the mobile sensor node are proposed. If the mobilesensing node finds the path to the sink node, it sends it to the dataaggregation station through multi-hop. Otherwise, it analyzes the two existingsituations (whether or not the Sink node is known), proposes differenttransmission probability calculation formulas.

(3) Using MATLAB to build an experimentalplatform. Implementing the algorithm proposed in this paper and comparisonalgorithm on the experimental platform. Analyzing and summarizing the data. Thesimulation analysis shows that the DTA can effectively realize the fasttransmission of useful information, reduce unnecessary losses, improve the datareceiving rate of the aggregation nodes, reduce the average hop count of thedata packet and improve the coverage of data transmission. Under certainconditions, the DTA is superior to the AODV and the AODV-L and can be appliedto a rapidly changing vehicle driving environment. The MSDR improves the datareceiving rate of the Sink node, and reduces the average energy consumption,residual energy variance, average packet loss rate and the data storagevariance of the node. Under the specific conditions, the MSDR algorithm isbetter than the AODV-M and the RASeR algorithm.

关键词:无线传感网;物联网;路由算法;移动传感网

wireless sensor network; internet ofthings; routing algorithm; mobile sensor network

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