Minutes of the SIPPING WG Session at IETF 70
============================================

Minutes edited by Gonzalo Camarillo
Based on notes by Brian Rosen and Bruce Lowekamp
Meeting chaired by Gonzalo Camarillo and Mary Barnes
Slides presented included in the proceedings

Tuesday, December 4th, 0900-1130
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Topic: Agenda Bash
Discussions led by: Chairs

The chais presented the status of the WG. There were discussions on
whether we need yet another way to send DTMF tones: basic DTMF. No
conclusion was reached.


Topic: Overload Design Team
Discussion led by: Jonathan Rosenberg
Relevant documents:
        draft-ietf-sipping-overload-reqs-01.txt

Jonathan presented the status of the design team and the simulation
results they have obtained so far. Some algorithms take longer than
others, but all of the end up collapsing. The stateless vs. stateful
terminology used by the designed team will have to be defined
(clarified) somewhere. Lars Eggert, transport area director, suggested
that the design team gets in touch with people with experience in
congestion control. The design team members claimed that they have
asked transport people but got no response. It was pointed out that
the fact that the design team is using a single topology and only UDP
may bias the results.


Topic: UA Profile Datasets
Discussion led by: Sam Ganesan
Relevant documents:
        draft-petrie-sipping-profile-datasets-05.txt

There was weak consensus in the room to make this draft a working
group item.


Topic: Updates to Asserted Identity
Discussion led by: John Elwell
Relevant documents:
        draft-elwell-sipping-update-pai-02.txt

There was weak consensus in the room to make this draft a working
group item.


Topic: Support for Application Profile Types 	
Discussion led by: Salvatore Loreto
Relevant documents:
        draft-channabasappa-sipping-app-profile-type-01.txt

It was suggested that this solution could be simplified. At this
point, it seems over engineered. 


Topic: Scaling Requirements for Presence
Discussion led by: Avshalom Houri
Relevant documents:
        draft-houri-sipping-presence-scaling-requirements-01.txt

There was strong consensus to adopt this document as a working group
item.


Topic: SIP URI Service Discovery Using DNS-SD
Discussion led by: Henning Schulzrinne
Relevant documents:
        draft-lee-sip-dns-sd-uri-02.txt

There was strong support in the room for this work. The chairs will
contact the DNS people to get their opinion before moving this
forward.


Topic: SPAM Score
Discussion led by: Dan Wing
Relevant documents:
        draft-wing-sipping-spam-score-00.txt

The draft proposes to standarize the mechanism to transport scores;
not the algorithm or algorithms to generate them. Some people
supported this work. Others opposed it on the grounds that it is not
clear that such a mechanism would help SPIT, since it is not clear yet
how SPIT will look like. It was also proposed to run this as an
experiment (i.e., an experimental RFC). It was also proposed to run a
BOF to better understand the problem area. It was also proposed to
start a study group (which would be closer to a WG than a design
team).

There was weak consensus in the room that working on spam scoring
would be useful.


Topic: SRTP Keys
Discussion led by: Dan Wing
Relevant documents:
        draft-wing-sipping-srtp-key-02.txt

There was strong consensus in the room to work on this. The chairs
will need to consult with the security ADs before moving this forward.

The meeting ended.