eCAR: edge-assisted Collaborative Augmented Reality Framework

TL;DR

eCAR is an edge-assisted framework that enhances multi-user collaborative augmented reality by reducing network traffic and latency, ensuring consistent virtual object synchronization in large indoor environments.

Contribution

It introduces an innovative edge computing approach that maintains spatial-temporal consistency and reduces communication overhead in collaborative AR applications.

Findings

Reduced network traffic for coordinate system alignment.

Lower latency in virtual object synchronization.

Improved virtual object consistency across devices.

Abstract

We propose a novel edge-assisted multi-user collaborative augmented reality framework in a large indoor environment. In Collaborative Augmented Reality, data communication that synchronizes virtual objects has large network traffic and high network latency. Due to drift, CAR applications without continuous data communication for coordinate system alignment have virtual object inconsistency. In addition, synchronization messages for online virtual object updates have high latency as the number of collaborative devices increases. To solve this problem, we implement the CAR framework, called eCAR, which utilizes edge computing to continuously match the device's coordinate system with less network traffic. Furthermore, we extend the co-visibility graph of the edge server to maintain virtual object spatial-temporal consistency in neighboring devices by synchronizing a local graph. We evaluate the system quantitatively and qualitatively in the public dataset and a physical indoor environment. eCAR communicates data for coordinate system alignment between the edge server and devices with less network traffic and latency. In addition, collaborative augmented reality synchronization algorithms quickly and accurately host and resolve virtual objects. The proposed system continuously aligns coordinate systems to multiple devices in a large indoor environment and shares augmented reality content. Through our system, users interact with virtual objects and share augmented reality experiences with neighboring users.