Introduction to Semantic Communications

The evolution of communication networks has closely followed the changing nature of human interaction with information. From the early days of voice transmission to the interconnected devices of today, networks have continuously adapted to the growing complexity of data. However, with the rise of intelligent devices and artificial intelligence (AI), combined with the capabilities of next-generation networks, traditional systems that function as mere “bit pipes” for raw data are becoming obsolete. They can no longer meet the demands of a hyper-connected, intelligent future. Semantic communication networks offer a transformative approach by shifting the focus from simply transferring data to transmitting meaning and significance. Unlike traditional networks, these advanced systems enable the exchange of understanding, allowing for more efficient and context-aware communication. This chapter introduces the concept of semantic communication as the foundation for the book, which is the first comprehensive exploration of this emerging field. Throughout the chapter, readers will encounter key themes and ideas that will be further explored in subsequent sections, providing a cohesive framework for understanding the principles, challenges, and applications of semantic communication networks. This book sets the stage for a future where communication systems are not just data-driven, but also meaning-driven, ensuring they can keep pace with the rapid advancements in AI and the complex demands of next-generation applications.