Summary
International Symposium on Antennas and Propagation
2012
Session Number:4D3
Session:
Number:4D3-5
First Challenge of PTP Time Synchronization Experiment through the Experimental Satellite for Communication, "WINDS"
Yusuke Kito, Satoshi Kubota, Fujinobu Takahashi, Takashi Takahashi, Toshio Asai, Norihiko Katayama,
pp.-
Publication Date:2012/10/29
Online ISSN:2188-5079
Summary:
We challenged and succeeded in the clock synchronization through the experimental satellite for communication, WINDS using PTP. PTP is the protocol for the hardware BIOS clocks synchronization that is also called IEEE 1588. It is said that PTP is more accurate than NTP that is popular for us as the time synchronization protocol. WINDS is the communication satellite launched by JAXA, in 2008. The Japanese WINDS satellite shows the top level bandwidth of Giga bit level. The satellite links are very effective to transfer very heavy contents of the distant e-Medicine and e-Education. We have been supported the construction of Japanese JICA ICT Centre in the University of the South Pacific (USP). The servers connected wirelessly for Medical ICT like e-Medicine must be synchronized within 1 second because the exchange and storage the data is needed to be included accurate time-stamp. Hence, PTP will be of help in such situation. We successfully performed the PTP clock synchronized experiment through WINDS Satellite. We found that if up throughput is different from down throughput such as satellite communication, the measured offset is different from the real offset. But the accuracy of the experiment is better than that of free running clock.