XRgo: Design and Evaluation of Rendering Offload for Low-Power Extended Reality Devices
Steven Gao, Jeffrey Liu, Qinjun Jiang, Finn Sinclair, William Sentosa, P. Brighten Godfrey, Sarita V. Adve · 2025
Extended reality (XR) devices must render high-quality 3D graphics at low latency to deliver truly immersive experiences. However, XR devices are severely power- and resource-constrained, limiting the quality of on-device (local) rendering. Offloading rendering to a powerful remote machine can enhance graphics quality, but network latency can degrade the overall experience. To mask latency, XR systems reproject the rendered frame to compensate for user motion since the rendered pose. Traditional reprojection, known as TimeWarp, uses a lightweight mechanism to compensate for latency in rotational motion, but not translational motion. Compensating for translational motion is more expensive, but is increasingly important at higher latencies.