An enhanced IEEE 1588 time synchronization for asymmetric communication link in packet transport network

Authors:
Shuai Lv;Yueming Lu;Yuefeng Ji
Affiliations:
Key Laboratory of IPOC, MOE, Beijing University of Posts and Telecommunications, Beijing, China;Key Laboratory of IPOC, MOE, Beijing University of Posts and Telecommunications, Beijing, China;Key Laboratory of IPOC, MOE, Beijing University of Posts and Telecommunications, Beijing, China
Venue:
IEEE Communications Letters
Year:
2010

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ICICA'12 Proceedings of the Third international conference on Information Computing and Applications

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Abstract

IEEE 1588 is a standard to synchronize independent clocks running on separate nodes of a distributed measurement and control system. In PTN (Packet Transport Network), it is considered as a key technology for supporting legacy TDM services and synchronizing 3G base stations. However, conventional IEEE 1588 synchronization algorithm assumes symmetrical links, and makes errors for asymmetric links for the calculation of the time difference between the master clock and the slave clock. We proposed an enhanced time synchronization method to calculate the time difference and the proposed method enhances an accuracy of the time synchronization.