Kavli Affiliate: Feng Wang
| First 5 Authors: Hao Fang, Hao Fang, , ,
| Summary:
Live streaming has experienced significant growth recently. Yet this rise in
popularity contrasts with the reality that a substantial segment of the global
population still lacks Internet access. The emergence of Low Earth orbit
Satellite Networks (LSNs), such as SpaceX’s Starlink and Amazon’s Project
Kuiper, presents a promising solution to fill this gap. Nevertheless, our
measurement study reveals that existing live streaming platforms may not be
able to deliver a smooth viewing experience on LSNs due to frequent satellite
handovers, which lead to frequent video rebuffering events. Current
state-of-the-art learning-based Adaptive Bitrate (ABR) algorithms, even when
trained on LSNs’ network traces, fail to manage the abrupt network variations
associated with satellite handovers effectively. To address these challenges,
for the first time, we introduce Satellite-Aware Rate Adaptation (SARA), a
versatile and lightweight middleware that can seamlessly integrate with various
ABR algorithms to enhance the performance of live streaming over LSNs. SARA
intelligently modulates video playback speed and furnishes ABR algorithms with
insights derived from the distinctive network characteristics of LSNs, thereby
aiding ABR algorithms in making informed bitrate selections and effectively
minimizing rebuffering events that occur during satellite handovers. Our
extensive evaluation shows that SARA can effectively reduce the rebuffering
time by an average of $39.41%$ and slightly improve latency by $0.65%$ while
only introducing an overall loss in bitrate by $0.13%$.
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