Timing-sync protocol for sensor networks
Proceedings of the 1st international conference on Embedded networked sensor systems
Robust synchronization of software clocks across the internet
Proceedings of the 4th ACM SIGCOMM conference on Internet measurement
Sensor network-based countersniper system
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
The flooding time synchronization protocol
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
Fine-grained network time synchronization using reference broadcasts
OSDI '02 Proceedings of the 5th symposium on Operating systems design and implementationCopyright restrictions prevent ACM from being able to make the PDFs for this conference available for downloading
Jigsaw: solving the puzzle of enterprise 802.11 analysis
Proceedings of the 2006 conference on Applications, technologies, architectures, and protocols for computer communications
Online estimation of RF interference
CoNEXT '08 Proceedings of the 2008 ACM CoNEXT Conference
Optimal clock synchronization in networks
Proceedings of the 7th ACM Conference on Embedded Networked Sensor Systems
The Internet of Things: A survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
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The Internet of Things(IoT) is a novel paradigm, where things are in the majority position of producers and consumers of traffic. IoT is expected to have a strong impact on our everyday life, i.e., the physical space around us. In the physical space, the notion of time is so universal that the information there is often combined with timestamps. To make them consistent among IoT nodes, applications need a clock synchronization mechanism, which has been an important topic in the research community. Whereas earlier studies focused mainly on improving synchronization accuracy, we focus on improving efficiency to achieve a given synchronization accuracy in a given environment. This viewpoint is important because applications do not always require the best synchronization accuracy and only limited resources are available for IoT nodes. We propose methods to identify and verify appropriate parameters for clock synchronization protocols. Because our methods are not limited to a specific protocol, we introduce a clock synchronization protocol model that generalizes a class of clock synchronization protocols and discuss our methods based on it. Our methods are demonstrated on a trace of time information collected in our testbed.