Kavli Affiliate: Feng Wang
| First 5 Authors: Haoyuan Zhao, Jianxin Shi, Guanzhen Wu, Hao Fang, Yi Ching Chou
| Summary:
The advent of Low-Earth Orbit satellite networks (LSNs), exemplified by
initiatives like emph{Starlink}, emph{OneWeb} and emph{Kuiper}, has ushered
in a new era of “Internet from Space" global connectivity. Recent studies have
shown that LSNs are capable of providing unprecedented download capacity and
low latency to support Livecast viewing. However, Livecast ingestion still
faces significant challenges, such as limited uplink capacity, bandwidth
degradation, and the burst of packet loss due to frequent satellite
reallocations, which cause previous recovery and adaptive solutions to be
inferior under this new scenario. In this paper, we conduct an in-depth
measurement study dedicated to understanding the implications of satellite
reallocations, which reveals that the network status during reallocations with
network anomalies exhibits a different distribution, leading to bimodal
behaviors on the overall network performance. Motivated by this finding, we
propose BAROC, a framework that can effectively conceal burst packet losses by
combining a novel proposed MTP-Informer with bimodal behavior awareness during
satellite reallocation. BAROC enhances video QoE on the server side by
addressing the above challenges and jointly determining the optimal video
encoding and recovery parameters. Our extensive evaluation shows that BAROC
outperforms other video delivery recovery approaches, achieving an average PSNR
improvement of $1.95$ dB and a maximum of $3.44$ dB, along with enhancements in
frame rate and parity packet utilization. Additionally, a comprehensive
ablation study is conducted to assess the effectiveness of MTP-Informer and
components in BAROC.
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