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The metaverse has awakened users' expectations of an immersive interactionthat fuses the virtual digital world and the physical world across space andtime. However, the metaverse is still in its infancy, typically expandingmulti-player applications (e.g., multi-player games) to implement a prototypewith the help of 5G/Beyond 5G, Artificial Intelligence, digital twin, and otherenabling technologies. This article reviews the characteristics, key enablingtechnologies, and driving applications of the state-of-the-art metaverse. Wefocus on the immersive interactions perspective of the metaverse from thetasks, inputs, and feedback across the users, digital world, and physical worldand reveal the key challenges. Afterwards, we present a multi-playerinteraction prototype platform based on a cloud-edge-device collaborativeframework. Also, we evaluate it with centralized and device-to-device (D2D)approaches to verify the efficiency and flexibility of interactions. Finally,we point out future research approaches and discuss potential solutions toenable more stable and higher quality multi-player interactions for metaverseservices.

Multi-Player Immersive Communications and Interactions in Metaverse: Challenges, Architecture, and Future Directions