IETF TICTOC Working Group Meeting
Thursday, 13 March, 2008, 1300-1500

The Jabber log can be found at http://jabber.ietf.org/logs/tictoc/2008-03-13.txt

The meeting was called to order by co-chairs Yaakov Stein and Stewart Bryant. 
Karen O'Donoghue took minutes and Luca Martini acted as Jabber scribe. The 
blue sheets were distributed, and the agenda was presented with no additions. 
Because this is the first meeting and the Working Group had only been 
formally created a few days prior to this IETF, drafts were not required in
advance. 


Working Group Status (Yaakov Stein)
===========================
Slides: tictoc-0.ppt

Yaakov indicated that the working group had been approved and chartered the 
previous week. The three current drafts were identified and milestones were 
briefly discussed. Greg Dowd asked about the status of his draft. It has 
apparently expired and will need to be resubmitted. Kurt Lindquist pointed 
out that we first need to figure out what we are trying to do before we 
identify specific output documents. Mark Townsley reiterated that the 
initial focus needs to be on requirements. 

On Path Support (Yaakov Stein)
=======================
Slides: tictoc-1.ppt

Yaakov provided a discussion on the definition of terminology for on-path 
support. This is a topic that has caused a great deal of confusion within 
the community. 


Requirements and viewpoints for backhaul synchronization (Xiaodong Duan)
=========================================================
Document: draft-zhou-tictoc-ran-sync-req-00.txt
Slides: tictoc-6.ppt

Ziaodong Duan provided a mobile backhaul perspective on requirements. One 
participant commented that this was a Chinese focused presentation and
that the rest of the world didn't require this accuracy. The working group 
is at the stage of gathering requirements. 


Internet Time Protocol Requirements (Kurt Lindquist)
=======================================
Document: draft-kurtis-tictoc-ipt-rqt-00.txt 
Slides: tictoc-7.pdf

Kurt presented the requirements documented in the draft. Mark Townsley 
clarified that backwards compatibility is written into the charter. There 
was a lengthy discussion on requirements including the notion of a higher 
precision clock protocol running as a substrate under NTP, timescale options, 
and whether the working group will address incremental changes or take a 
clean slate approach. 

NTP/1588 Gap Analysis (Greg Dowd) 
===========================
Slides: tictoc-8.ppt

Greg Dowd discussed the pros and cons of the existing NTP and IEEE 1588 
approaches, providing suggestions for improvements and refinements of each. 

NTPv5 requirements (Karen O'Donoghue)
===============================
Slides: tictoc-9.ppt

Karen O'Donoghue provided a summary of work items that had been identified 
during the course of the NTPv4 effort. Stewart Bryant indicated that this 
material should be added to the problem statement document. 

1588 Profiles (Silvana Rodriques)
=========================
Slides: tictoc-3.ppt

Silvana provided an overview of the definition of an IEEE 1588 profile as 
defined by the IEEE 1588 standards group.  

IEEE 1588 for Telecom Considerations (Laurent Montini)
=========================================
Slides: tictoc-2.ppt
 
Laurent Montini provided some thoughts on what should be considered when 
developing an IEEE 1588 profile for telecommunications.


1588V2 Telecom Profile Framework (Kuiwen Ji) 
===================================
Document: draft-ji-tictoc-1588-telecom-profile-framework-01.txt
Slides: tictoc-4.ppt

Kuiwen Ji (Jacky) discussed the development of a IEEE 1588 Version 2 profile 
for use in wireless backhaul networks. 

A New Timing Distribution Mechanism (Kuiwen Ji)
======================================
Document: draft-ji-tictoc-new-timing-distribution-mechanism-00.txt
Slides: tictoc-5.ppt

Kuiwen Ji provided a discussion on a new timing distribution mechanism in 
GMPLS. Kurt Lindquist pointed out that the legacy equipment discussed in 
the presentation is actually the majority of the Internet. 

The meeting concluded with a general discussion of the way forward. Greg 
Dowd indicated that it is not possible to do all that has been discussed 
in a single ubiquituous solution. Kurt expressed the opinion that the IETF 
works better when we start with a problem and develop a solution and not 
the other way around. The WG needs to clarify the requirements of the 
problem being solved. Dave Oran stated that one needs to illustrate that 
generic systems architecture can be system engineered to meet use case 
requirements. The difficulty of implementing a Transparent Clock at the 
IP layer was discussed. Finally, the chairs asked for contributions, 
discussed the possibility of an interim meeting, and adjourned the meeting.