The root of the challenge is increasing the utilization of optical bandwidth including with or without optical fiber as depicted in Figure below.
The research development principle is inspired by the following Einstein quotes such as:
“Everything should be made as simple as possible, but not simpler.”
“Anyone who has never made a mistake has never tried anything new.”
“As far as the laws of mathematics refer to reality, they are not certain, as far as they are certain, they do not refer to reality.”
“Not everything that counts can be counted and not everything that can be counted counts.”
For time being, the recent research is generally working on radio over fiber and particularly on WLAN over fiber.