Detection and Elimination of Time Synchronization Problems for the GERESS Array by Correlating Microseismic Noise

2003 ◽  
Vol 74 (6) ◽  
pp. 803-816 ◽  
Author(s):  
K. Koch ◽  
K. Stammler
Keyword(s):  
Time Synchronization ◽  
Synchronization Problems

scholarly journals Overview of Time Synchronization for IoT Deployments: Clock Discipline Algorithms and Protocols

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5928
Author(s):  
Hüseyin Yiğitler ◽  
Behnam Badihi ◽  
Riku Jäntti
Keyword(s):  
Time Synchronization ◽  
Clock Synchronization ◽  
Constrained Systems ◽  
Clock Model ◽  
Network Time ◽  
Expected Performance ◽  
The Everyday ◽  
Network Time Protocol ◽  
Synchronization Problems ◽  
Constrained Devices

Internet of Things (IoT) is expected to change the everyday life of its users by enabling data exchanges among pervasive things through the Internet. Such a broad aim, however, puts prohibitive constraints on applications demanding time-synchronized operation for the chronological ordering of information or synchronous execution of some tasks, since in general the networks are formed by entities of widely varying resources. On one hand, the existing contemporary solutions for time synchronization, such as Network Time Protocol, do not easily tailor to resource-constrained devices, and on the other, the available solutions for constrained systems do not extend well to heterogeneous deployments. In this article, the time synchronization problems for IoT deployments for applications requiring a coherent notion of time are studied. Detailed derivations of the clock model and various clock relation models are provided. The clock synchronization methods are also presented for different models, and their expected performance are derived and illustrated. A survey of time synchronization protocols is provided to aid the IoT practitioners to select appropriate components for a deployment. The clock discipline algorithms are presented in a tutorial format, while the time synchronization methods are summarized as a survey. Therefore, this paper is a holistic overview of the available time synchronization methods for IoT deployments.

scholarly journals Hybrid time synchronization for Underwater Sensor Networks

ACTA IMEKO ◽  
2015 ◽  
Vol 4 (3) ◽  
pp. 30
Author(s):  
Oriol Pallares Valls ◽  
Pierre-Jean Bouvet ◽  
Joaquí­n Del Rí­o
Keyword(s):  
Shallow Water ◽  
Time Synchronization ◽  
Water Channel ◽  
Distributed Applications ◽  
Underwater Sensor Networks ◽  
Critical Part ◽  
Communication Challenges ◽  
Hybrid Synchronization ◽  
Simulation Results ◽  
Synchronization Problems

<p>Time synchronization is a critical part of distributed applications over a sensor network. In this work we investigate time synchronization problems over UWSN deployed in shallow water, taking into account all main communication challenges of the water channel and observing its behavior in simulation and real tests. A hybrid frame was proposed based on time synchronization using both LFM and OFDM communication with channel impulse response equalization. Simulation results show how Hybrid synchronization outperforms existing synchronization protocols and how these results are affected in real underwater tests.</p>

DR-TSP: A data repairing framework for time synchronization problems in ERI data

2021 ◽  
pp. 1-1
Author(s):  
Dong Xia ◽  
Linjiang Zheng ◽  
Li Chen ◽  
Weining Liu ◽  
Dihua Sun
Keyword(s):  
Time Synchronization ◽  
Data Repairing ◽  
Synchronization Problems
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