Title :
An Enhanced IEEE 1588 Time Synchronization for Asymmetric Communication Link in Packet Transport Network
Author :
Lv, Shuai ; Lu, Yueming ; Ji, Yuefeng
Author_Institution :
Key Lab. of IPOC, Beijing Univ. of Posts & Telecommun., Beijing, China
fDate :
8/1/2010 12:00:00 AM
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.
Keywords :
3G mobile communication; IEEE standards; packet radio networks; protocols; radio links; synchronisation; time division multiplexing; 3G base station synchronization; asymmetric communication link; control system; distributed measurement system; enhanced IEEE 1588 time synchronization algorithm; independent clock synchronization; legacy TDM services; master clock; packet transport network; slave clock; time division multiplexing; Accuracy; Base stations; Clocks; Communication standards; Delay; Delay effects; Delay estimation; Equations; Master-slave; Mathematical model; Protocols; Synchronization; Time division multiplexing; Time measurement; IEEE 1588; PTN; synchronization;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2010.08.091601
