Architectural analysis of multiple fiber ring networks employing optical paths

Abstract

This paper analyzes the performance of various types of multiple fiber ring networks employing optical paths (OP's). The multiple fiber ring network architecture is suitable for achieving failure resilient networks that have extremely large bandwidth but are still upgradable against future increases in traffic. This architecture will overcome the limitation of conventional WDM rings in terms of network expansion capabilities, the number of nodes within the ring, and the number of OP's accommodated in the network. The generic node architecture suitable for multiple fiber ring networks is presented and functionality requirements are identified. The OP accommodation design algorithms that minimize the required node system scale are proposed. Based on the generic node architecture and proposed OP accommodation design algorithms, we evaluated the performance of several types of multiple fiber rings in terms of the required node system scale for rings under various conditions. The effect of the ring architecture (uni-/bidirectional rings), optical path schemes (wavelength path/virtual wavelength path), and different node connectivity patterns are demonstrated for the first time. The obtained results elucidate the criteria for selecting the most suitable multiple fiber ring architecture.

Demonstration of an optical phase conjugation based dual‐hop PDM‐QPSK free‐space optical communication link

“…In future FSO communication networks, the OPC unit can be applied to the relay node to guarantee the availability of the backhaul link. It can also be used in the FSO self‐healing ring as a protection structure [14].…”

Application of DWDM-OADM employed in a railway-area communication network

“…We can calculate the network scalability according to equation (1) To estimate the scalability of the proposed network, we calculated the number of node versus network spacing according to equation (1). The parameters used in this calculation were as follows: the transmitter and the receiver followed STN-16 optical port demands, loss range=3OdB, fiber attenuation coefficient = O.25dB/km,the OADM, DWDM components based on thin film technology, the insertion losses=O.8dB/chip, Lc 0.5dB, L penalty ldB.…”

Free-Space Communication Turbulence Compensation by Optical Phase Conjugation

“…A self-healing ring is often adopted to mitigate network component failures in ring network architectures [20], [21]. The dualhop link with the OPC technique can be applied to the FSO self-healing ring network as a part of protection scheme.…”