Embedded System on NTP

2009 Fourth International Conference on Computer Sciences and Convergence Information Technology

Chien-Chi ChaoShih-Ping HuangHo-Lung Hung

1

Outline

• Introduction– Network Time Protocol (NTP)– NTP Pool Project

• Experiment• Conclusion• Reference

2

Introduction• The Network Time Protocol (NTP) (RFC

1305) is proposed in 1980 .• Original NTP Topology

3

Introduction cont.

• Clock synchronization flow chart with NTP.

4

Introduction cont.

• The NTP Pool Project, a self-voluntary organization, is founded by Adrian von Bidder.

• The main goal of the NTP Pool Project is to provide the free service of the time synchronization.

• The union of the assistances from the different sources equips the NTP Pool Project to become a successful project.

5

Introduction cont.

• The NTP Pool Project Topology.

6

Experiment

7

Experiment cont.

• The operational process of the NTPD

8

Experiment cont.

9

Conclusion

• The NTP Pool Project is a well-designed network system based on the distributed framework to avoid the network traffic.

• After installation of the NTP software, we need to check the NTP setting to avoid the selection of the NTP server too far away.

10

Reference

• David L. Mills, “Internet Time Synchronization: The Network Time Protocol,” IEEE Transactions on Communications, Vol. 39, No. 10, Oct 1991.

• NTP Pool Project, http://www.pool.ntp.org• RFC 1305

11