6G Radio Access Networks

A Radio Access Network (RAN) is an important part of any wireless communication system that connects end users with the other components of a network through radio communication links. This chapter discusses the three key concepts of sixth‐generation (6G) RANs, including Aerial Radio Access Network (ARAN), AI‐enabled Radio Access Network, and Open Radio Access Network (O‐RAN). Due to massive Internet of Things connection, diverse quality of service requirements, and numerous use cases, 6G RANs are expected to support flexibility, massive interconnectivity, and energy efficiency. In the context of comprehensive 6G access infrastructure, ARANs are positioned in the aerial communication layer to serve high‐altitude and terrestrial users. O‐RAN is centered on the concept of openness and intelligence of the network elements. There are two major O‐RAN organizations, including the Telecom Infra Project and the O‐RAN alliance.