Journal ArticleDOI
An Implementation of IEEE 1588 Over IEEE 802.11b for Synchronization of Wireless Local Area Network Nodes
TLDR
Experimental results are presented that show that potential accuracy limitations introduced by the physical layer of the IEEE 802.11b wireless local area network do not preclude clock-synchronization accuracy of several hundred nanoseconds.Abstract:
IEEE 1588 is a new standard to synchronize independent clocks running on separate nodes of a distributed measurement and control system. It is intended for high-accuracy implementations on compact systems such as a single subnet. This paper examines potential accuracy limitations introduced by the physical layer of the IEEE 802.11b wireless local area network. Experimental results are presented that show that these limitations do not preclude clock-synchronization accuracy of several hundred nanoseconds.read more
Citations
More filters
Journal ArticleDOI
The Evolution of Cellular Backhaul Technologies: Current Issues and Future Trends
TL;DR: This survey aims to provide a comprehensive study of state-of-the-art circuit switched and emerging packet switched backhaul technologies based on research articles and standard documents and discusses the practically important Pseudowire approaches which are used to transport TDM services over packet switched networks.
Patent
Device for optically scanning and measuring an environment
TL;DR: In this paper, a movable scanner with at least one first projector for producing at least 1 uncoded first pattern on an object in the environment is provided, where the controller is further configured to register the set of images relative based in part on the stationary second pattern.
Patent
Coordinate measurement machines with removable accessories
TL;DR: A portable articulated arm coordinate measuring machine for measuring the coordinates of an object in space is provided in this article, which includes a base and an arm portion having an opposed first and second ends.
Patent
Method and apparatus for synchronizing measurements taken by multiple metrology devices
TL;DR: The IEEE 1588 precision time protocol (I1588PMT) protocol as discussed by the authors is a time synchronization protocol that allows at least two devices to communicate with each other in both a wired manner and a wireless manner.
Journal ArticleDOI
Clock Synchronization Over IEEE 802.11—A Survey of Methodologies and Protocols
TL;DR: This survey looks into the details of synchronization over IEEE 802.11 with a particular focus on the infrastructure mode which is most relevant for industrial use cases and highlights the different parameters which affect the performance of clock synchronization over WLAN and compares the performances of existing synchronization methods to analyze their shortcomings.
References
More filters
Proceedings ArticleDOI
Timing-sync protocol for sensor networks
TL;DR: It is argued that TPSN roughly gives a 2x better performance as compared to Reference Broadcast Synchronization (RBS) and verify this by implementing RBS on motes and use simulations to verify its accuracy over large-scale networks.
Journal ArticleDOI
Time synchronization in sensor networks: a survey
Fikret Sivrikaya,Bülent Yener +1 more
TL;DR: The time synchronization problem and the need for synchronization in sensor networks is reviewed, then the basic synchronization methods explicitly designed and proposed for sensor networks are presented.
Journal Article
Time synchronization in wireless sensor networks
Jeremy Elson,Deborah Estrin +1 more
TL;DR: In this article, a service model for time synchronization is proposed to better support the broad range of application requirements seen in sensor networks, while meeting the unique resource constraints found in such systems.
Proceedings ArticleDOI
Time synchronization in ad hoc networks
TL;DR: This work presents a time synchronization scheme that is appropriate for sparse ad hoc networks and explains how the data sensed by various smart things can be combined to derive knowledge about the environment, which enables the smart things to "react" intelligently to their environment.
Journal ArticleDOI
Global clock synchronization in sensor networks
Qun Li,Daniela Rus +1 more
TL;DR: The diffusion-based protocol is presented, which is fully localized, and it is shown that, by imposing some constraints on the sensor network, global clock synchronization can be achieved in the presence of malicious nodes that exhibit Byzantine failures.