ZTE

ZTE Communications ›› 2010, Vol. 8 ›› Issue (3): 37-41.

• Research Paper • Previous Articles     Next Articles

Analysis of Time Synchronization in PTN

Li Han   

  1. China Mobile Research Institute, Beijing 100053, P. R. China
  • Online:2010-09-25 Published:2020-02-28
  • About author:Li Han received his Ph.D. degree from Beijing University of Posts and Telecommunications. He is a deputy principle at China Mobile Research Institute, mainly engaged in the research of transmission, wired access and synchronization technologies. He has published over 50 papers in national and international journals, and applied for more than 20 patents. Being also an ITU-T editor, he has delivered over 60 ITU-T contributions.

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Abstract: For Time Division Synchronous Code Division Multiple Access (TD-SCDMA) and Time Division Long Term Evolution (TD-LTE) wireless systems, using Global Positioning System (GPS) for time synchronization is problematic. In these wireless systems, GPS is costly, insecure, and difficult to deploy. Nowadays, transportation of high precision time/phase synchronization signals via fiber, and based on Precision Time Protocol (PTP) has become mainstream technology. This paper analyzes the main factors affecting time synchronization in a Packet Transport Network (PTN) adopting IEEE 1588v2. Laboratory experiments and field tests prove the feasibility of transporting high precision time synchronization signals through a PTN adopting IEEE 1588v2. A comparison is also made between different networking modes for a PTN adopting IEEE 1588v2.