基于机会网络的室内移动目标导航机制研究

发布时间：2018-04-29 06:10

本文选题：机会网络 + 射频识别　；参考：《南京大学》2014年硕士论文

【摘要】：基于位置的服务是移动互联网发展的重要方向。随着智能手机等智能移动设备的普及,越来越多的基于用户位置信息的创新应用出现,基于位置的服务正在深刻地改变着人们的生活方式。2014年,继腾讯公司入股四维图新布局地图业务后,阿里巴巴又全资收购高德地图。至此,国内互联网三大巨头百度、腾讯、阿里在地图领域布局完成。导航服务是基于位置服务的一个重要组成部分。经过多年的发展,全球定位系统的精度不断提高,已经能够基本满足室外导航服务的需要。在交通运输、远洋航海等领域室外导航取得了巨大成功。然而,由于建筑物遮挡、多径效应等因素的影响,全球定位系统在室内环境下无法使用。此外,作为导航系统关键技术之一的定位技术在室内环境下目前尚不够成熟。近年来射频识别(RFID)技术发展迅速,大量成本低廉、分布在环境中的射频识别标签和“群智感知”等思想,为许多传统问题带来了新的解决思路。本文针对室内导航问题进行研究,提出了一种基于机会网络的室内移动目标导航机制。利用射频识别网络存储用户的位置信息,并通过用户的移动将位置信息在网络上传播,来实现移动目标的导航。进一步地,本文的主要贡献包括以下两个部分：1)提出了一种由射频识别标签和移动用户所组成网络的消息传播机制。该消息传播机制将消息划分为两种类型、将移动用户分为三种角色,通过定义不同角色用户对不同类型消息的“存储-携带-转发”行为,来实现移动目标位置信息的传播。进而根据收集到的目标位置信息,提出了一种基于目标区域的导航算法。2)提出了一组真实环境下射频识别标签存储资源的管理方法,并对用户的移动行为进行建模和实证研究。标签存储资源管理方法有消息的分段式管理、单请求多事件等写入和替换策略。最后,本文在理想移动模型以及近似真实商场环境下进行实验,对所提出的消息传播机制和标签资源管理方法进行评价。实验结果表明,该导航机制可以明显的减小平均寻找时间。
[Abstract]:Location-based service is an important direction of mobile Internet development. With the popularity of smart mobile devices such as smartphones, more and more innovative applications based on user location information are emerging, and location-based services are profoundly changing the way people live. Following Tencent's stake in four-dimensional map new layout business, Alibaba and the acquisition of Amap. At this point, the domestic Internet giant Baidu, Tencent, Ali in the map field layout completed. Navigation service is an important part of location-based service. With the development of many years, the precision of GPS has been improved, which can meet the need of outdoor navigation service. In transportation, ocean navigation and other areas of outdoor navigation has achieved great success. However, due to the influence of building occlusion and multipath effect, GPS can not be used in indoor environment. In addition, as one of the key technologies of navigation system, positioning technology is not mature enough in indoor environment. In recent years, RFID (Radio Frequency Identification) technology has developed rapidly, a large number of low-cost RFID tags and "group intelligence perception" distributed in the environment have brought new solutions to many traditional problems. In this paper, aiming at the problem of indoor navigation, an indoor moving target navigation mechanism based on opportunistic network is proposed. The location information of the user is stored in the RFID network, and the location information is propagated on the network through the user's movement to realize the navigation of the moving target. Furthermore, the main contributions of this paper include the following two parts: 1) A message propagation mechanism consisting of RFID tags and mobile users is proposed. The message propagation mechanism divides the message into two types and divides the mobile user into three roles. By defining the "store-carry-forward" behavior of different role users to different types of messages, the mobile target location information is propagated. Then, according to the collected target location information, a navigation algorithm based on target region. 2) A set of management methods of RFID tag storage resources in real environment is proposed, and the mobile behavior of users is modeled and empirically studied. Tag storage resource management methods include message segmental management, single request and multiple events write and replace strategy. Finally, in the ideal mobile model and near real market environment, the proposed message dissemination mechanism and label resource management methods are evaluated. Experimental results show that the navigation mechanism can significantly reduce the average search time.
【学位授予单位】：南京大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.01;TN929.5

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