International journal of advanced smart convergence

The Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회)
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A Study of Time Synchronization Methods for IoT Network Nodes

  • Yoo, Sung Geun (Graduate School of Nano IT Design Fusion, Seoultech) ;
  • Park, Sangil (IT Fusion Technology Research Center, Seoultech) ;
  • Lee, Won-Young (Dept. of Electronic and IT Media Engineering, Seoultech)
  • Received : 2020.01.15
  • Accepted : 2020.01.25
  • Published : 2020.03.31
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Abstract

Many devices are connected on the internet to give functionalities for interconnected services. In 2020', The number of devices connected to the internet will be reached 5.8 billion. Moreover, many connected service provider such as Google and Amazon, suggests edge computing and mesh networks to cope with this situation which the many devices completely connected on their networks. This paper introduces the current state of the introduction of the wireless mesh network and edge cloud in order to efficiently manage a large number of nodes in the exploding Internet of Things (IoT) network and introduces the existing Network Time Protocol (NTP). On the basis of this, we propose a relatively accurate time synchronization method, especially in heterogeneous mesh networks. Using this NTP, multiple time coordinators can be placed in a mesh network to find the delay error using the average delay time and the delay time of the time coordinator. Therefore, accurate time can be synchronized when implementing IoT, remote metering, and real-time media streaming using IoT mesh network.

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References

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