Nanotechnology has been recognised as the interesting subject of research and investigation in either theory or experiment for a decade, where many research works and implementations have shown the significant growth and progress in many related technologies. Recently, the use of a small wave guide known as micro and/nanoring resonators has shown the potential of applications in many research areas, especially, in computer, communication and signal processing in the nanoscale regime. This book presents the immerging techniques that can be merged into one particular subject, which is known as Nano Communications Networks. In applications, such devices, techniques or systems can be integrated and used for some particular applications.