Semantic Communications for 6G Future Internet: Fundamentals, Applications, and Challenges

by   Wanting Yang, et al.

With the increasing demand for intelligent services, the sixth-generation (6G) wireless networks will shift from a traditional architecture that focuses solely on high transmission rate to a new architecture that is based on the intelligent connection of everything. Semantic communication (SemCom), a revolutionary architecture that integrates user as well as application requirements and meaning of information into the data processing and transmission, is predicted to become a new core paradigm in 6G. While SemCom is expected to progress beyond the classical Shannon paradigm, several obstacles need to be overcome on the way to a SemCom-enabled smart wireless Internet. In this paper, we first highlight the motivations and compelling reasons of SemCom in 6G. Then, we outline the major 6G visions and key enabler techniques which lay the foundation of SemCom. Meanwhile, we highlight some benefits of SemCom-empowered 6G and present a SemCom-native 6G network architecture. Next, we show the evolution of SemCom from its introduction to classical SemCom related theory and modern AI-enabled SemCom. Following that, focusing on modern SemCom, we classify SemCom into three categories, i.e., semantic-oriented communication, goal-oriented communication, and semantic-aware communication, and introduce three types of semantic metrics. We then discuss the applications, the challenges and technologies related to semantics and communication. Finally, we introduce future research opportunities. In a nutshell, this paper investigates the fundamentals of SemCom, its applications in 6G networks, and the existing challenges and open issues for further direction.


Rethinking Wireless Communication Security in Semantic Internet of Things

Semantic communication is an important participant in the next generatio...

Communication Beyond Transmitting Bits: Semantics-Guided Source and Channel Coding

Classical communication paradigms focus on accurately transmitting bits ...

Tutorial-Cum-Survey on Semantic and Goal- Oriented Communication: Research Landscape, Challenges, and Future Directions

SemCom and goal-oriented SemCom are designed to transmit only semantical...

From Semantic Communication to Semantic-aware Networking: Model, Architecture, and Open Problems

Existing communication systems are mainly built based on Shannon's infor...

Future Architecture of the Interplanetary Internet

Fifty years after the Apollo program, space exploration has recently bee...

Towards Goal-Oriented Semantic Communications: New Metrics, Open Challenges, and Future Research Directions

Since Shannon's pioneering masterpiece which established the prototype o...

Toward Intelligent and Efficient 6G Networks: JCSC Enabled On-Purpose Machine Communications

Driven by the vision of "intelligent connection of everything" toward 6G...

Please sign up or login with your details

Forgot password? Click here to reset