Journal ArticleDOI
Probabilistic clock synchronization
TLDR
A probabilistic method is proposed for reading remote clocks in distributed systems subject to unbounded random communication delays and can achieve clock synchronization precisions superior to those attainable by previously published clock synchronization algorithms.Abstract:
A probabilistic method is proposed for reading remote clocks in distributed systems subject to unbounded random communication delays. The method can achieve clock synchronization precisions superior to those attainable by previously published clock synchronization algorithms. Its use is illustrated by presenting a time service which maintains externally (and hence, internally) synchronized clocks in the presence of process, communication and clock failures.read more
Citations
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Patent
Power meter with current and phase sensor
TL;DR: In this article, a power meter consisting of a voltage sensor, at least one current and phase sensor circuit, and a central metering unit is presented, where the voltage sensor is further configured to measure a voltage on an input line and transmit a signal related to the voltage to the central unit.
Proceedings ArticleDOI
A Clock Synchronization Strategy for Minimizing Clock Variance at Runtime in High-End Computing Environments
Terry Jones,Gregory A. Koenig +1 more
TL;DR: A new software-based clock synchronization scheme that provides high precision time agreement among distributed memory nodes and permits initial unbounded variations in time and corrects both slow and fast chimers (clock skew).
Book
Clock Synchronization in Distributed Systems
TL;DR: The presented solution provides a synchronization that can otherwise be achieved only with the help of specialized GPS timing receivers, thus excellently complementing these solutions when increased fault-tolerance is required or when access to an antenna is not feasible.
Proceedings ArticleDOI
Local Time Synchronization in Bluetooth Piconets for Data Fusion Using Mobile Phones
TL;DR: This paper presents a method to synchronize the clocks in a Bluetooth piconet from the application layer in a mobile phone that adapts algorithms for time synchronization of distributed systems and the Internet to Bluetooth networks.
Proceedings ArticleDOI
Fault-tolerance in the Advanced Automation System
TL;DR: The authors discuss the general approach to fault tolerance adopted in the AAS by reviewing some of the questions asked during the system design, various alternative solutions considered, and the reasons for the design choices made.
References
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Journal ArticleDOI
Clock Synchronization in Distributed Real-Time Systems
TL;DR: Depending on the types and number of tolerated faults, this paper presents upper bounds on the achievable synchronization accuracy for external and internal synchronization in a distributed real-time system.
Journal ArticleDOI
Synchronizing clocks in the presence of faults
TL;DR: Three algorithms for maintaining clock synchrony in a distributed multiprocess system where each process has its own clock work in the presence of arbitrary clock or process failures, including “two-faced clocks” that present different values to different processes.
Journal ArticleDOI
Optimal clock synchronization
T. K. Srikanth,Sam Toueg +1 more
TL;DR: This is the first known solution that achieves optimal accuracy—the accuracy of synchronized clocks (with respect to real time) is as good as that specified for the underlying hardware clocks.
Proceedings ArticleDOI
A new fault-tolerant algorithm for clock synchronization
Jennifer Lundelius,Nancy Lynch +1 more
TL;DR: A new fault-tolerant algorithm for solving a variant of Lamport's clock synchronization problem for a system of distributed processes that communicate by sending messages, which solves the problem of maintaining closely synchronized local times, assuming that processes' local times are closely synchronized initially.
Journal ArticleDOI
A new fault-tolerant algorithm for clock synchronization
Jennifer L. Welch,Nancy Lynch +1 more
TL;DR: A new fault-tolerant algorithm for solving a variant of Lamport's clock synchronization problem for a system of distributed processes that communicate by sending messages that maintains synchronization to within a small constant, whose magnitude depends upon the rate of clock drift, the message delivery time and its uncertainty.