Journal ArticleDOI
Estimation of Clock Skew for Time Synchronization Based on Two-Way Message Exchange Mechanism in Industrial Wireless Sensor Networks
Reads0
Chats0
TLDR
This paper investigates the clock synchronization schemes of active node and overhearing node with immediate clock readjustment and proposes the maximum-likelihood estimators of the clock skew and the corresponding Cramer–Rao lower bounds, derived assuming Gaussian delays.Abstract:
Time synchronization is indispensable for convenient network management, device monitoring, security, and other fundamental operations in industrial wireless sensor networks (IWSNs) Over the past few decades, a wide variety of highly accurate clock synchronization protocols have been investigated by employing powerful statistical signal processing techniques However, most two-way exchange estimation schemes do not readjust the node's local clock upon every resynchronization before the clock parameters are estimated And it may not be appropriate in IWSNs where time synchronization is consistently required Based on the two-way message exchange mechanism, this paper investigates the clock synchronization schemes of active node and overhearing node with immediate clock readjustment The maximum-likelihood estimators of the clock skew and the corresponding Cramer–Rao lower bounds are derived assuming Gaussian delays Simulation and experimental results validate the performance of the proposed estimatorsread more
Citations
More filters
Journal ArticleDOI
TMSRS: trust management-based secure routing scheme in industrial wireless sensor network with fog computing
TL;DR: A Gaussian distribution-based comprehensive trust management system (GDTMS) for F-IWSN that can effectively prevent the appearance of network holes, and balance the network load, promote the survivability of the network and is better than other similar algorithms.
Journal ArticleDOI
Rapid-Flooding Time Synchronization for Large-Scale Wireless Sensor Networks
TL;DR: A rapid-flooding multiple one-way broadcast time-synchronization (RMTS) protocol for large-scale wireless sensor networks is proposed, which uses maximum likelihood estimations for clock skew estimation and clock offset estimation, and quickly shares the estimations among the networks to minimize the by-hop error accumulation.
Posted Content
A Beaconless Asymmetric Energy-Efficient Time Synchronization Scheme for Resource-Constrained Multi-Hop Wireless Sensor Networks
TL;DR: A framework of reverse asymmetric time synchronization for resource-constrained multi-hop WSNs and a beaconless energy-efficient time synchronization scheme based on reverse one-way message dissemination are introduced.
Journal ArticleDOI
Distributed Clock Synchronization Based on Intelligent Clustering in Local Area Industrial IoT Systems
TL;DR: This article proposed a distributed clock synchronization protocol based on an intelligent clustering algorithm to achieve accurate, secure, and packet-efficient clock synchronization that overwhelms simultaneous synchronization protocols in terms of synchronization performance and faulty node detection.
Journal ArticleDOI
A Beaconless Asymmetric Energy-Efficient Time Synchronization Scheme for Resource-Constrained Multi-Hop Wireless Sensor Networks
TL;DR: In this paper, the authors introduce a framework of reverse asymmetric time synchronization for resource-constrained multi-hop WSNs and propose a beaconless energy-efficient time synchronization scheme based on reverse one-way message dissemination.
References
More filters
Journal ArticleDOI
Wireless integrated network sensors
TL;DR: The WINS network represents a new monitoring and control capability for applications in such industries as transportation, manufacturing, health care, environmental oversight, and safety and security, and opportunities depend on development of a scalable, low-cost, sensor-network architecture.
Journal ArticleDOI
Fine-grained network time synchronization using reference broadcasts
TL;DR: Reference Broadcast Synchronization (RBS) as discussed by the authors is a scheme in which nodes send reference beacons to their neighbors using physical-layer broadcasts, and receivers use their arrival time as a point of reference for comparing their clocks.
Proceedings ArticleDOI
The flooding time synchronization protocol
TL;DR: The FTSP achieves its robustness by utilizing periodic flooding of synchronization messages, and implicit dynamic topology update and comprehensive error compensation including clock skew estimation, which is markedly better than that of the existing RBS and TPSN algorithms.
BookDOI
Protocols and Architectures for Wireless Sensor Networks: Karl/Protocols and Architectures for Wireless Sensor Networks
Holger Karl,Andreas Willig +1 more
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.
Related Papers (5)
Estimation of Frequency Offset for Time Synchronization With Immediate Clock Adjustment in Multihop Wireless Sensor Networks
Clock Offset and Skew Estimation Using Hybrid One-Way Message Dissemination and Two-Way Timestamp Free Synchronization in Wireless Sensor Networks
Clock Skew Estimation of Listening Nodes with Clock Correction upon Every Synchronization in Wireless Sensor Networks
Heng Wang,Haiyong Zeng,Ping Wang +2 more