ABSTRACT
This chapter examines the essential requirements and enabling technologies of the sixth-generation (6G) network and highlights the critical design issues driving the 6G network applications. Visible Light Communication is a superior choice that employs low-cost light-emitting diodes to attain higher frequency bands than terahertz signals. The 6G standard necessitates the use of highly efficient transmitter and receiver antennas. The goal of 6G is to offer communication beneath the water. The underwater world is complicated and unexpected, with significant signal attenuation and equipment damage. The capacity of a 6G network may be improved by increasing spectral bandwidth and its efficiency. The communication network will change depending on the coverage. The essential aspects of 6G are confidentiality, integrity, and availability. The evolution journey in technological developments added new features according to demands from end-user and network operators, such as mobile data volumes, number of connected devices, low latency, end-user data rates, reliability, and channel bandwidth, and mobility of devices.
