Cisco Workshop on Adaptive Media Transport
14 June 2012
/ adaptive-iptv
I attended the Workshop on Adaptive Media Transport organised by Cisco in San Jose, CA,
on 14-15 June 2012. For our project,
Martin Ellis and Conor Cahir also attended from Glasgow, along with
Jörg Ott and Varun Singh
from Aalto University.
Jörg presented our work on
Content- and Cache-aware TCP (“Poor Man's Information-Centric Networking”).
This work aims to provide an pervasive TCP segment caching service, that
can improve scalability of adaptive video streaming services, amongst other
applications. It is intended that CA-TCP will to offer many of the benefits
of the many clean-slate information-centric networking architectures, but
in an incrementally deployable and backwards compatible form. More details
can be found in our technical report on
Poor Man's Content Centric Networking (with TCP).
Martin gave a presentation
on our work on Modeling Packet
Loss in RTP-Based Streaming Video for Residential Users. This evaluates
several widely used packet loss models (the simple Gilbert model, an extended
Gilbert model, and 2- and 3-state hidden Markov models) against our previous
measurements of IPTV performance, to determine how well the models capture
the observed behaviour. Using a parametric bootstrap technique, it shows that
these models are not effective for describing the behaviour of residential
broadband links. A new, two-level, Markov model is developed, using both loss
and delay as inputs, and shown to more accurately model packet loss patterns
on residential links.
Finally, Varun presented his work on
Predictive Buffering for Streaming Video in 3G Networks. This uses a
crowd-sourced wireless coverage mapping service to predictively pre-fetch
content, to help ensure good user experience in mobile video streaming systems.