I forgot to say that we also will provide an Open Source version of our proposal.
> On Nov 17, 2017, at 3:01 PM, J Ignacio Alvarez-Hamelin > <[email protected]> wrote: > > Hi Greg, > > Yes, I am aware of them. The main problem is when you would like to > synchronize two points anywhere on the Internet. For example, consider one > computer in Argentina (Buenos Aires) and other at US (Los Angeles), the round > trip time is around 140ms and traffic conditions varies a lot. In such > context, NTP does not guarantee more than some decades of mili-seconds, PTP > required specific hardware, and TSClock cannot work well in such conditions. > Our proposal is around ten micro-seconds of error working as a difference > clock (definition of [1]) where both clocks differ in a constant. This kind > of synchronization is useful when you try to understand the dynamics of > delays, where microseconds count. > Is it more clear now? > > [1] Veitch D, Ridoux J, Korada SB. Robust synchronization of absolute and > difference clocks over networks. IEEE/ACM Transactions on Networking (TON). > 2009 Apr 1;17(2):417-30. > > > Thanks for your time, > > J. Ignacio > > _______________________________________________________________ > > CONICET and Facultad de Ingeniería, Universidad de Buenos Aires > Av. Paseo Colón 850 - C1063ACV - Buenos Aires - Argentina > +54 (11) 5285 0716 / 5285 0705 > e-mail: [email protected] > web: http://cnet.fi.uba.ar/ignacio.alvarez-hamelin/ > _______________________________________________________________ > > > >> On Nov 17, 2017, at 1:44 PM, Greg Dowd <[email protected]> wrote: >> >> There are any number of protocols designed to synchronize clock frequency >> and/or phase between 2, or many, devices over network connections to a >> relative or absolute timescale. At the physical layer, there are protocols >> such as synchronous ethernet, at the ethernet layer PTP, at the application >> layer NTP. Can you provide some detail of your proposal and what unique >> problems or configurations it addresses as contrasted with existing >> protocols? >> >> ...Greg >> >> >> -----Original Message----- >> From: TICTOC [mailto:[email protected]] On Behalf Of J Ignacio >> Alvarez-Hamelin >> Sent: Friday, November 17, 2017 5:18 AM >> To: [email protected] >> Subject: [TICTOC] A new proposition about clock synchronization on Internet >> >> EXTERNAL EMAIL >> >> >> Dear all, >> >> I subscribed to this list because several people in IPPM WG pointed out this >> WG as the right one for this proposition. I joined the IPPM three years ago, >> and I participate in the meetings because part of my work is related to >> measurements on the Internet. Motivates with that, my research group >> developed a new proposal to synchronize two endpoints on the Internet (if >> you would like to measure delays in each way you need the clocks >> synchronization). >> I hope that I could prepare a draft for the IETF 101 about this topic (which >> carried some attention on IPPM), and I would like to confirm this interest >> on TICTOC, and also to know the deadline for the next meetings. >> >> With my best regards, >> >> >> >> Dr. Ing. José Ignacio Alvarez-Hamelin >> _______________________________________________________________ >> >> CONICET and Facultad de Ingeniería, Universidad de Buenos Aires Av. Paseo >> Colón 850 - C1063ACV - Buenos Aires - Argentina >> +54 (11) 5285 0716 / 5285 0705 >> e-mail: [email protected] >> web: http://cnet.fi.uba.ar/ignacio.alvarez-hamelin/ >> _______________________________________________________________ >> >> >> >> _______________________________________________ >> TICTOC mailing list >> [email protected] >> https://www.ietf.org/mailman/listinfo/tictoc > _______________________________________________ TICTOC mailing list [email protected] https://www.ietf.org/mailman/listinfo/tictoc
