ABSTRACT
Every decade a generation of mobile communication is succeeded by a new one offering distinct features and services to meet user and network demand. 1G was launched in 1979, and it marked the first generation of cellular telephony. The second generation of mobile communication was launched in the early 1990s, and these mobile systems use digital radio signals. Universal mobile telecommunications system was introduced with third generation systems. Fourth generation (4G) systems’ approach was practical to offer users high speed, high quality and high capacity. Fifth generation systems are in the commercial deployment phase and intended to improve their predecessor-4G through data rates, latency, and other enhancements. Sixth generation (6G) systems have their Key Performance Indicators, and requirements to guide the research activities for academia and industry. Artificial intelligence and machine learning are eminent in 6G system architecture, making it intelligent, self-evolving, self-organizing, and self-healing. The chapter also presents an overview of the key concepts discussed in this book.
