  The Metaverse depicts a parallel digitalized world where virtuality and
reality are fused. It has economic and social systems like those in the real
world and provides intelligent services and applications. In this paper, we
introduce the Metaverse from a new technology perspective, including its
essence, corresponding technical framework, and potential technical challenges.
Specifically, we analyze the essence of the Metaverse from its etymology and
point out breakthroughs promising to be made in time, space, and contents of
the Metaverse by citing Maslow's Hierarchy of Needs. Subsequently, we conclude
four pillars of the Metaverse, named ubiquitous connections, space convergence,
virtuality and reality interaction, and human-centered communication, and
establish a corresponding technical framework. Additionally, we envision open
issues and challenges of the Metaverse in the technical aspect. The work
proposes a new technology perspective of the Metaverse and will provide further
guidance for its technology development in the future.
