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Discover how MP2, a groundbreaking centralized VR streaming system, revolutionizes multi-user free-roaming virtual reality experiences in this 19-minute conference presentation from USENIX ATC '25. Learn about the unprecedented challenges of streaming VR content over wireless networks for groups of users navigating rooms and buildings, including maintaining low latency during handover, balancing loads across access points, and stabilizing bitrates for competing users. Explore how existing decentralized solutions fail due to users lacking information about others and making locally optimal decisions, and understand MP2's innovative approach using a centralized controller that collects cross-layer information from each user to make globally informed decisions. Examine the system's efficient pruning and partitioning algorithms that enable timely coordination of multiple Wi-Fi links and video bitrates among users for enhanced quality of experience. Review comprehensive benchmark results from real-world tests, large-scale emulation, and trace-driven user studies that demonstrate MP2's superior performance, achieving 35× improvement in tail latency, 1.56× in bitrate, and 1.86× in quality of experience over state-of-the-art baselines, with up to 99.1% improvement in mean opinion scores according to user studies.
