An Indoor Positioning Service for Bluetooth Ad Hoc Networks
An Indoor Positioning Service for Bluetooth Ad Hoc Networks
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发表时间：
2003
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通讯作者：
K. Thapa
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作者：
K. Thapa
移动性一直是无线技术成功背后的关键特征之一。一旦这种移动性与位置感知相结合，各种各样的附加应用就成为可能。位置感知的关键是准确评估移动的用户的本地位置。本地定位是指用于确定任何设备相对于位置已知的其他设备的位置的技术。目前已经有几种定位技术，如全球定位系统、Wave LAN、Loran、Decca和Omega，从卫星到地面，从军用到完全商用，操作频率各不相同。这些定位技术通常不适合于室内定位。本文讨论了基于蓝牙ad-hoc无线网络标准的本地定位服务的开发。蓝牙最初被认为是电缆的替代品，是一种有前途的低功耗、短距离无线电系统新技术，可用于创建广泛的无线服务。位置信息可以通过使用任何通用无线基础设施、通过使用各种通信度量从已知位置进行三角测量来获得。典型的度量包括使用信号强度、误码率（BER）或时间延迟。原始蓝牙规范不提供对访问此类通信度量的固有支持。因此，利用蓝牙进行本地定位应用仍然是一个新兴的研究领域，并提供了各种挑战，必须解决，以便提供准确的定位信息。本文首先讨论了与基于蓝牙通信的室内定位相关的各种理论和实践方面。然后，本文提出了一个建议的解决方案的基础上交换的定位信息之间的主设备和从设备在蓝牙微微网。本文最后介绍了初步结果的基础上初步实施拟议的服务。
Mobility has been one of the key features behind the success of wireless technology. A wide variety of additional applications are possible once this mobility is combined with location awareness. Critical for location awareness is an accurate assessment of the mobile user’s local position. Local Positioning refers to a technology used to determine the position of any device with respect to the other devices whose positions are already known. There are already several positioning technologies such Global Positioning System (GPS), Wave LAN, Loran, Decca and Omega ranging from satellite-based to terrestrial-based, military-owned to fully commercial and with varying frequencies of operations. These positioning technologies are, generally, unsuitable for indoor positioning. This paper discusses the development of a local positioning service based on the Bluetooth ad-hoc wireless network standard. Originally conceived as a cable replacement, Bluetooth is a promising new technology of low power, short range, wireless radio system that can be used to create a wide range of wireless services. Position information can be obtained by using any generic wireless infrastructure by using various communication metrics to triangulate from known positions. Typical metrics include the use of signal strength, bit error rate (BER), or time delay. The original Bluetooth specification does not provide inherent support for access to such communication metrics. Thus, utilization of Bluetooth for local positioning applications still remains an emerging research area and offers a variety of challenges that must be addressed in order to provide accurate positioning information. This paper begins with a discussion of the various theoretical and practical aspects associated with indoor positioning based on Bluetooth communication. The paper then presents a proposed solution based on the exchange of positioning information between master and slave devices within a Bluetooth piconet. The paper closes with a presentation of preliminary results based on an initial implementation of the proposed service.