Multi-subcarrier flexible bit-loading enabled capacity improvement in meshed optical networks with cascaded ROADMs

Subcarrier Multiplexing in Optical Networks

This paper describes the applicability of subcarrier multiplexing to light wave multiple-access networks. It is shown how currently available microwave and light wave components can be used, by using subcarrier multiplexing, to provide high-capacity networks and also how can increase the number of users who support the network.

Adaptive Subcarrier Allocation and Bit Loading for Multiuser OFDM Systems

This paper proposes a new algorithm of adaptive subcarrier allocation and bit loading for simultaneous voice and data transmission in multiuser OFDM systems. The algorithm dynamically assigns the number of subcarriers and bits/per symbol on each subcarrier for each user in a single cell. To cope with the stringent delay requirement of voice service, the subcarriers with low channel gains are as...

Scaling the Benefits of Digital Nonlinear Compensation in High Bit-Rate Optical Meshed Networks

rOaDms in Next-Generation Networks

A description of ROADMs is given from a system's perspective. ROADM types and architectures are described, and how they are likely to evolve. A discussion is given for how bit rates beyond 100 Gb/s are likely to be realized and the ROADM requirements to support these bit rates. The paper concludes with a discussion on optical power management and control plane functionality to fully automate a ...

Optical WDM Networks: Traffic Grooming in Mesh Networks and Metro Networks using ROADMs

Optical Fiber technology employing wavelength-division multiplexing (WDM) has and continues to be investigated and commercially deployed to meet our ever-increasing bandwidth demands. WDM partitions the huge bandwidth of an optical fiber into many non-overlapping wavelength channels, each of which can operate at the data rate of 10 Gbps (or 40 Gbps or higher). This dissertation investigates des...