The mobile industry - via forums such as the O-RAN Alliance and
Linux Foundation CAMARA - is working on network APIs that
allow a mobile network operator to expose network capabilities to
application developers. One of these APIs is the Quality on Demand
(QoD) API, which enables the application to ask for additional
network resources for improved latency or bandwidth. In this work,
we show how an intelligent content delivery network (CDN) can
exploit these APIs to improve the quality of experience (QoE) of
video streaming despite difficult network conditions by boosting
the available network bandwidth at precise moments in time. As
the bandwidth boost is only applied whenever necessary, we avoid
the caveat of constantly and statically assigning network resources
to a service. We propose two boosting strategies both relying on
information provided by the video player via Common Media Client
Data (CMCD). We implemented the approach and evaluated it on
an emulation testbed and on top of an actual 5G O-RAN compliant
network capable of running xApps and the CAMARA QoD API.
Our evaluation shows the gains in terms of QoE but also highlights
possible caveats and adverse interactions with the ABR algorithm
of the video player.
Type:
Conference
City:
Bari
Date:
2024-04-15
Department:
Communication systems
Eurecom Ref:
7666
Copyright:
© ACM, 2024. This is the author's version of the work. It is posted here by permission of ACM for your personal use. Not for redistribution. The definitive version was published in https://dl.acm.org/doi/10.1145/3651863.3651882
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