Method and Model for Wavelength Allocation in WDM Passive Optical Networks

To circumvent issue of Rayleigh noise reduction in wavelength-divisionmultiplexed passive optical network (WDM-PON), we provide an insight into the source of Rayleigh noise, and confirm that the suppression of carrier Rayleigh backscattering (RB) should be the primary target in the design of Rayleigh noise-resilient upstream receiver module. This paper studies an alternative network architecture with dynamic wavelength allocation to provide a scalable optical architecture with a guaranteed QoS in the presence of dynamic and bursty traffic loads. The dependence of carrier RB suppression on DI’s extinction ratio (ER) and optical carrier’s line width is also theoretically analyzed. In this article, we present a delay-constrained admission control mechanism and adapt this scheme to our previously proposed bandwidth allocation technique. The relations between different parameters of optical network unit (ONU) are also studied.