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      当前室内定位技术研究方向呈现多元化,如基于移动通信网络的辅助全球定位系统GPS(A-GPS)、无线局域网(WLAN)中的Wi-Fi、Zigbee网络、iBeacon网络下的蓝牙(Bluetooth,BT)、超宽带(Ultra Wide Band,UWB)、RFID等无线通信技术。其中,UWB技术以具备优异的抗多径干扰性能,高时间分辨率和低功耗等特点成为室内精确定位方面学术界和产业界的研究热点。
      针对以上情况,本文提出一种无冲突的邻居发现方法,并在UWB MAC层中进行实现。 本协议结合定位算法特点,能够适用于多节点动态变化和实时定位的场景,较好地达到了UWB传感网络定位系统的要求,保证了UWB超宽带精确定位网络性能。
Other Abstract
    With the development of the society and the accelerating urbanization process, the number of tall buildings is increasing. As the development of mobile smart devices and wireless networks technology, people's demand for location based service (LBS) is increasing. The emergence of the indoor positioning in the museum, mall and subway, making people aware of the directions in complex buildings. At the same time, we need to use accurate indoor positioning public security, public health, safety, special crowd monitoring, large venue management, wisdom urban construction and other fields,especially the mine disaster, fire, earthquake and other natural disasters.
    Currently, research direction of indoor positioning technology is plural, such as the auxiliary GPS(A-GPS) based on mobile communication network, Wifi based on wireless local area network (WLAN), Zigbee network, Bluetooth based on beacon network, Bluetooth, BT), Ultra wideband radio (UWB), RFID, etc. Among these technology, ultra wideband radio (UWB) system becomes indoor high-precision positioning research focus in the academia and industry due to its high-performance resistance against multi-path interference, high temporal resolution and low power consumption.
    In practical application scenario, inevitably there are lots positioning nodes in the process of dynamic change. This paper focus on the high-precision positioning system based on Ultra wideband radio (UWB) using Time Difference of Arrival (TDOA) measurements, and study the key technology of UWB sensor networks. Media access control (MAC) protocol is responsible for detecting and avoiding data packet collisions in wireless sensor networks. However, because of the difference between UWB systems and traditional narrowband system, and real-time, dynamic characteristic of UWB positioning system, the existing wireless sensor network MAC protocols cannot meet the needs of the UWB precision positioning network.
    In view of the above situation, this paper proposes a collision free neighbor discovery protocol which can be implemented on UWB MAC layer. Combining with the characteristics of localization algorithm, the proposed protocol is suitable for multi-node, real-time of UWB positioning sensor network. Therefore, the protocol has reached the requirement of UWB precision positioning network, ensuring the ultra wideband (UWB) high precision positioning network performance. 
    Simulation analysis and hardware platform validation show that the proposed neighbor discovery protocol in MAC layer can effectively deal with positioning packet collisions in UWB high precision positioning network, satisfying the dynamic and real-time requirements of the network.
Keyword超宽带定位 无线传感网络 Mac层协议 邻居发现
Subject Area计算机应用技术 无线传感网络
Document Type学位论文
First Author AffilicationInstitute of Automation, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
刘伟. UWB传感网络定位系统关键技术研究[D]. 北京. 中国科学院大学,2017.
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UWB传感网络定位系统关键技术研究-刘伟(3607KB)学位论文 限制开放CC BY-NC-SA
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