Liaison statement
Liaison Statement on Webpush for DASH

State Posted
Posted Date 2014-11-03
From Group ISO-IEC-JTC1-SC29-WG11
From Contact Shinji Watanabe
To Group webpush
To Contacts Joe Hildebrand
Shida Schubert
CcRichard Barnes
Alissa Cooper
webpush@ietf.org
Stephan Wenger
Purpose For comment
Deadline 2015-02-09 Action Needed
Attachments Liaison Statement on Webpush for DASH
Body
MPEG would like to inform IETF about its MPEG-DASH’s FDH core experiment (CE)
and
receive IETF’s Webpush Working Groups’ feedback on the following subject.

Full Duplex HTTP (FDH) CE is tackling the problem of delivering media segments
with shorter delay and/or reducing the request processing on the HTTP server.
The technologies considered are HTTP/2 and WebSockets. The main idea is that
once a client is interested in streaming a particular content (e.g., a live
channel), it may be beneficial not to send periodic individual GET requests
for each segment to the server network. The server network may keep sending
segments once they become available to the client for a predetermined amount
of time or until the client tells the server to stop. Note that not all
clients streaming the same content will necessarily use the “push” feature.
Some may continue fetching each segment separately, some may ask for push of
the several next segments or some may ask for push till a further command.

The FDH core experiment’s description is included in the attached document to
provide more detailed information.

We would like to ask you to consider media delivery use cases as part of your
webpush activity.We would also like to ask for your opinion on the choice of
protocols and the related best practices.

Some MPEG experts are expected to participate in the next meeting (IETF 91 in
Honolulu) and provide more detail and MPEG welcomes IETF’s collaborations on
the subject.

Our future meetings:
- DASH Ad-hoc meeting, 15 February 2015, Geneva
- The 111th MPEG meeting, 16-20 February 2015, Geneva