Introduction -- Evolution of Broadband Connectivity for Different Network Generations -- Broadband Connectivity and its Types of 5G and Beyond -- Next Generation Passive Optical Networks Stage 2 for Fronthauling of 5G and Beyond -- Millimeter and Sub-THz Wave Over Fiber for Broadband Connectivity between RRH and BBU -- Hybrid Fiber and Wireless Access Network for 5G and Beyond -- MIMO Antennas: Recent Developments and Design Issues -- Metamaterial based MIMO Antenna for Broadband Connectivity -- 5G MIMO Antenna Systems -- Terahertz Optical Transmission based on Coherent Digital Signal Processing -- M-ary Signalling for FSO under Different Atmospheric Conditions -- Spatial Mode Division Multiplexing Approach to Conquer Capacity Barricade of Optical Fibers -- GMPLS Network Connectivity for 5G and Beyond -- Switching Elements for Broadband Connectivity in 5G and Beyond -- Role of Radio over Fiber for Broadband connectivity -- Future Research Directions and Scope -- Conclusion.

This book discusses the role of optical networks in 3G, 4G, 5G and beyond. The authors discuss the evolution of the technologies, the research involved, and the applications with respect to optical communication systems. In addition, the book provides in-depth knowledge of broadband connectivity for future generation networks. More focus is given towards the front-, mid- and back- hauling of 5G and beyond. The authors present architecture for broadband connectivity and explain its potential in 5G and beyond applications. This book includes several architectures based on Hybrid Fiber-Wireless; Next Generation Passive Optical Networks Stage 1 and 2; millimeter wave over fiber; sub-THz wave over fiber; millimeter/sub-THz wave over multicore fiber; 6G fronthaul; 6G backhaul; GMPLS networks, and massive MIMO sub-Thz antenna. The contributors provide supplementary material such as simulations, analysis and experiments. Discusses the role of optical networks in 3G, 4G, 5G and beyond in both research and application; Includes multiple aspects of broadband connectivity including MIMO antenna, sub-THz over fiber and free space optics; Includes simulations, analysis, and experiments.