Analysis and Simulation on Clock Resynchronization in Time Triggered Architecture

2014 ◽  
Vol 556-562 ◽  
pp. 4408-4411
Author(s):  
Chun Xu ◽  
Yue Lin ◽  
Ya Nan Gao ◽  
Song Tao Fan
Keyword(s):  
Real Time ◽  
Fault Tolerant ◽  
Clock Synchronization ◽  
Formal Analysis ◽  
Synchronization Process ◽  
Matlab Simulink ◽  
Clock Drift ◽  
Synchronization Algorithm

An improved clock synchronization algorithm for time triggered architecture has been proposed in this paper. A single reference real time is added in the system, so periodically calibration to real time can be achieved. This algorithm is based on the classical Welch-Lynch[1] fault tolerant clock synchronization process. Systematic clock drift problem has been solved by using the algorithm. Formal analysis is presented, and verification is taken on Matlab/Simulink platform. Simulation result has verified the performance of the algorithm, and the clock difference is bounded as expected.

scholarly journals Improvement of Physical Clock Synchronization Algorithm by Two-Level Synchronization

2013 ◽  
Vol 11 (6) ◽  
pp. 2648-2652
Author(s):  
M. Praveen Kumar Reddy ◽  
K. Ashwin Kumar ◽  
S. Rajesh Kumar ◽  
RA.K. Saravanaguru
Keyword(s):  
Distributed Systems ◽  
Clock Synchronization ◽  
Clock Drift ◽  
Common Time ◽  
Synchronization Algorithm ◽  
External Clock Synchronization ◽  
The Common ◽  
External Clock

Synchronization of the clocks is one of the essential thing for many applications in distributed systems. Clock synchronization is very important because they improve the performance and reliability of distributed systems. The main purpose of clock synchronization algorithms is to provide the common time to essential parts of the distributed systems. In this paper the problem considered is synchronization of clock with bounded clock drift and proposing a two level synchronization algorithm which synchronizes the processors local clocks by combining both internal and external clock synchronization.

Clock synchronization in distributed multicomputer systems. Part II

2021 ◽  
Author(s):  
I.V. Asharina
Keyword(s):  
Technology Development ◽  
Fault Tolerant ◽  
Clock Synchronization ◽  
Fault Model ◽  
Complex Task ◽  
Space Applications ◽  
Synchronization Process ◽  
Byzantine Faults ◽  
Characteristic Features ◽  
Modern Technologies

The study substantiates the necessity of clock synchronization in distributed multicomputer systems. The basic definitions related to the concept of clock synchronization are given, and methods of clock synchronization are classified. Increasing the lifecycle of failure- and fault-tolerant distributed multicomputer systems for critical application is one of the most urgent problems at the current level of technology development. This is especially true for unattended distributed multicomputer systems for space applications. The second part deals with synchronization in systems with Byzantine faults, and this is a complex task due to the characteristic features of the fault model. The synchronization process in multi-cluster and multi-complex systems is associated with the multitasking of such systems, which makes the synchronization process even more relevant and multi-criteria. The paper considers the modern technologies providing the synchronization process in systems of critical use.

scholarly journals Verification of Fault-Tolerant Clock Synchronization Algorithms

10.29007/hq8s ◽  
2018 ◽  
Author(s):  
Sergiy Bogomolov ◽  
Christian Herrera ◽  
Wilfried Steiner
Keyword(s):  
Fault Tolerant ◽  
Clock Synchronization ◽  
Optimization Techniques ◽  
Synchronization Algorithm ◽  
Information Consistency

In this paper we propose a benchmark for verification of properties of fault-tolerantclock synchronization algorithms, namely, a benchmark of a TTEthernet network, whereproperties of the clock synchronization algorithm as implemented in a TTEthernet network can be verified, and optimization techniques for verification purposes can be applied.Our benchmark, which assumes non-faulty components, aims to be a basis for verifyingconfigurations which include faulty components, information consistency mechanisms, and for verifying other clock synchronization algorithms.

Research on a Real-Time Fault Tolerant Time Synchronization Algorithm for GSM-R Wireless Sensor Networks Based on Network Materials

2011 ◽  
Vol 63-64 ◽  
pp. 905-910
Author(s):  
Xiao Wu Huang ◽  
Gui Tang Wang ◽  
Wen Juan Liu ◽  
Feng Wang
Keyword(s):  
Wireless Sensor Networks ◽  
Fault Tolerance ◽  
Sensor Networks ◽  
Real Time ◽  
High Speed ◽  
Time Synchronization ◽  
Fault Tolerant ◽  
Wireless Sensor ◽  
Synchronization Algorithm ◽  
Network Time

Time synchronization is a key technology in wireless sensor networks. In this paper, aim at high-speed railway GSM-R network require higher real time, fault tolerance and band coverage way, presents a real-time fault-tolerant wireless sensor network time synchronization algorithm, using direct forwarding strategy, regression analysis and abnormal data filtering methods to meet the requirements of GSM-R network. Analysis and simulation show that the algorithm has good real-time and fault tolerance to meet the requirements of GSM-R network applications.

Clock synchronization in distributed multicomputer systems. Part I

2021 ◽  
Author(s):  
I.V. Asharina
Keyword(s):  
Time Synchronization ◽  
Technology Development ◽  
Fault Tolerant ◽  
Clock Synchronization ◽  
Current Level ◽  
Space Applications ◽  
Synchronization Process ◽  
Byzantine Faults ◽  
Modern Technologies ◽  
Clock Module

The study substantiates the necessity of clock synchronization in distributed multicomputer systems. The basic definitions related to the concept of clock synchronization are given, and methods of clock synchronization are classified. Increasing the lifecycle of failure- and fault-tolerant distributed multicomputer systems for critical application is one of the most urgent problems at the current level of technology development. This is especially true for unattended distributed multicomputer systems for space applications. The development of such systems should begin with the construction of models of faults and self-controlled degradation, ensuring, firstly, their failure and fault tolerance and, secondly, maximum survivability, which is possible only if there are means of clock synchronization in such systems. All activities associated with ensuring the synchronization of any distributed multicomputer systems begin with the concept of synchronization of on-board functions, which is based on the generation of on-board time and includes the synchronization of on-board software and equipment that requires time synchronization or information about the course of time. The main elements of this concept are the processor clock module, the onboard software clock, the atomic navigation clock. The first part of the work gives basic definitions, and considers methods and algorithms related to the clock synchronization process. The second part is devoted to synchronization in systems with Byzantine faults and in multi-cluster and multi-complex, i.e. multitask, systems. The modern technologies providing the synchronization process in such systems are considered.

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