A Survey on Static Routing Wavelength Assignment Considering Physical Layer Impairments in Wavelength Divison Multiplexing Optical Networks

Imagine a world of people who are connected through networks either they are far or close to each other and they could communicate in just “planks time”(that is believed to be the possible shortest duration) by paying less and obtaining great speed to communicate, this is just what the researchers are trying to obtain these days. One of the major problems facing optical networks is Routing and Wavelength Assignment (RWA) of optical signals taking into consideration the impairments caused by the physical layer. A regular RWA which does not consider impairments is often used to solve the RWA of optical signals but this approach could be improved. Various researchers have tried to solve regular RWA under physical impairments in order to improve or replace it. This survey is about their research.