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http://dx.doi.org/10.6109/jkiice.2017.21.4.724

Improvement of Time Synchronization of SpaceWire Network through Time-Code Extension  

Ryu, Sang-Moon (Department of Information and Control Engineering, Kunsan National University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.21, no.4, 2017 , pp. 724-730 More about this Journal
Abstract
SpaceWire invented for spacecrafts has Time-Code defined for time synchronization over SpaceWire network. A Time-Code suffers transmission delay of 14[bit-period] and jitter up to 10[bit-period] whenever it passes through a SpaceWire link, which is the primary cause of time synchronization error. This work presents a simple method to improve the time synchronization which uses two extended Time-Codes. Nodes on a SpaceWire network can find how much delay and jitter a received Time-Code has suffered while it passes through the network, and they can correct time synchronization error with this information. The proposed method was validated in a simulation environment developed based on OMNeT++. The simulation result showed that time synchronization error less than a few bit-periods can be achieved. The proposed method is cost effective and suitable for small-scale SpaceWire network systems.
Keywords
SpaceWire; time synchronization; Time-Code extension; OMNeT++;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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