CheepSync:一个时间同步服务，为资源有限的蓝牙低能耗广告客户

Proceedings of the 14th International Conference on Information Processing in Sensor Networks Pub Date : 2015-04-13 DOI:10.1145/2737095.2742925

S. Sridhar, P. Misra, J. Warrior

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引用次数: 10

摘要

时钟同步在分布式系统中是非常需要的，包括物联网和人(IoTH)中的许多应用。对于物联网，蓝牙低功耗(BLE)——最近的蓝牙v4:0堆栈的一个子集——为传感器数据收集提供了一种低功耗和松散耦合的机制，用于人类携带的无处不在的设备(例如智能手机和平板电脑)。BLE的这种基本设计范例是通过一系列广播广告模式实现的。虽然它的运营优势很多，但在BLE的广播模式中缺乏共同的时间参考是一个根本的限制。这项工作提出并描述了CheepSync:为BLE广告客户提供的时间同步服务架构。我们在定制设计的nRF24Cheep信标平台(作为广播器)和商用现成的Android移植智能手机(作为被动听众)上实现CheepSync;结果表明，平均(单跳)时间同步精度在10 μs范围内。

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CheepSync: a time synchronization service for resource constrained bluetooth low energy advertisers

Clock synchronization is highly desirable in distributed systems, including many applications in the Internet of Things and Humans (IoTH). For IoTH, Bluetooth Low Energy (BLE) - a subset of the recent Bluetooth v4:0 stack - provides a low-power and loosely coupled mechanism for sensor data collection with ubiquitous units (e.g., smartphones and tablets) carried by humans. This fundamental design paradigm of BLE is enabled by a range of broadcast advertising modes. While its operational benefits are numerous, the lack of a common time reference in the broadcast mode of BLE has been a fundamental limitation. This work presents and describes CheepSync: a time synchronization service architecture for BLE advertisers. We implement CheepSync on custom designed nRF24Cheep beacon platforms (as broadcasters) and commercial off-the-shelf Android ported smartphones (as passive listeners); and show that the average (single hop) time synchronization accuracy is in the 10 μs range.

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Proceedings of the 14th International Conference on Information Processing in Sensor Networks

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