AI 中文总结
本文提出基于MoQ的多接入分块流框架MultiMoQ，通过重新设计传输机制提升沉浸式视频流的鲁棒性，经仿真验证其在吞吐量、延迟及播放连续性上优于DASH和标准MoQ。
AI 中文摘要
沉浸式视频流直播，尤其是360度视频，正越来越多地应用于虚拟活动、体育转播和远程教育等场景。现有方法难以支持大量并发用户的高码率沉浸式流，粗粒度传输限制了响应性，且对并发分块流的协调支持不足。媒体传输 QUIC（Media over QUIC，MoQ）近期成为大规模媒体传输的有前景方案，但在带宽受限条件下鲁棒性不足，常导致播放卡顿。为应对这些挑战，本文提出MultiMoQ，一种基于MoQ的多接入分块流框架，其重新设计了传输机制，以实现跨多接入路径的鲁棒高码率流，同时支持灵活的分块调度和无缝接入切换。我们实现了MultiMoQ的全功能原型，并在异构真实网络条件下的网络仿真中进行评估，与动态自适应HTTP流（Dynamic Adaptive Streaming over HTTP，DASH）和标准MoQ进行对比。结果显示，与DASH相比，MultiMoQ提升了增强分块和基础视频的有效吞吐量，并降低了增强分块的尾端到端延迟，同时保持了音频连续性，避免了标准MoQ的持续卡顿。这些传输层面的增益转化为更流畅的视口播放， ablation 结果进一步证实了多接入控制对播放连续性的贡献。
英文摘要
Live immersive video streaming, particularly 360-degree video, is increasingly adopted in applications such as virtual events, sports broadcasting, and remote education. Existing approaches struggle to support high-bitrate immersive streaming for large numbers of concurrent users, with coarse-grained delivery limiting responsiveness and insufficient support for coordinating concurrent tile streams. Media over QUIC (MoQ) has recently emerged as a promising solution for large-scale media delivery, yet it lacks robustness under bandwidth-constrained conditions, often resulting in playback stalls. To address these challenges, we present MultiMoQ, a multi-access tile streaming framework built on MoQ that redesigns its delivery mechanism for robust high-bitrate streaming across multiple access paths while supporting flexible tile scheduling and seamless access switching. We implement a fully functional prototype of MultiMoQ and evaluate it in network emulation under heterogeneous real-world network conditions, comparing against Dynamic Adaptive Streaming over HTTP (DASH) and standard MoQ. Results show that MultiMoQ increases goodput for enhancement tiles and base video and reduces enhancement-tile tail end-to-end latency relative to DASH, while preserving audio continuity and avoiding the persistent stalls of standard MoQ. These transport gains translate into smoother viewport playback, and the ablation results further confirm the contribution of multi-access control to playback continuity.
Comments9 pages, 15 figures. Accepted for publication in the Proceedings of the 34th ACM International Conference on Multimedia (ACM MM 2026)
