  The sixth generation (6G) networks are expected to enable immersive
communications and bridge the physical and the virtual worlds. Integrating
extended reality, holography, and haptics, immersive communications will
revolutionize how people work, entertain, and communicate by enabling lifelike
interactions. However, the unprecedented demand for data transmission rate and
the stringent requirements on latency and reliability create challenges for 6G
networks to support immersive communications. In this survey article, we
present the prospect of immersive communications and investigate emerging
solutions to the corresponding challenges for 6G. First, we introduce use cases
of immersive communications, in the fields of entertainment, education, and
healthcare. Second, we present the concepts of immersive communications,
including extended reality, haptic communication, and holographic
communication, their basic implementation procedures, and their requirements on
networks in terms of transmission rate, latency, and reliability. Third, we
summarize the potential solutions to addressing the challenges from the aspects
of communication, computing, and networking. Finally, we discuss future
research directions and conclude this study.
