Routing and wavelength allocation in multi-wavelength all-optical ring networks

Abstract

This paper addresses the issues of routing and wavelength allocation in multi-wavelength all-optical ring networks with and without wavelength conversion capabilities. A mathematical modeling based on integer linear programming and several heuristic approaches are investigated. It is shown that optimal routing and wavelength allocation in the systems with wavelength conversion can be achieved almost effortlessly for ring networks of up to 70 nodes using the mathematical modeling. However, if no wavelength conversion is permitted, the computational time of the mathematical modeling becomes excessive even with a network as small as 7-10 nodes.Accordingly, heuristic techniques are proposed and their performance is extensively evaluated on various traftic scenarios. In addition, this study includes an investigation of the use of wavelength conversion for improving network resource utilization in ring network structures.

Neuron-based wavelength assignment for optical wavelength division multiplexing service systems

“…Table 5 shows an example of blocking traffic. Three new traffic streams (1,8), (7,3), and (3,6) are added in Table 1. The stream (1,8) is blocked.…”

“…Baldine also studied the problem of dynamic load balancing in broadcast OWDM networks by retuning a subset of transceivers in response to the changes in the overall traffic patterns [11]. Wuttisittikukij studied the performance with and without wavelength conversion capabilities on various traffic scenarios in multiwavelength all-optical ring networks [1]. These mechanisms can produce the optimal or sub-optimal status at a specified OWDM service network.…”

“…To meet the increasing demand for multimedia processing and communication services, fiber optic transmission technology has been accepted as the most realistic solution for the future growth of broadband transport networks [1,2]. While the classical transmission systems used the multiplexing temporal method for transmission of 155 Mb/s, 622 Mb/s, 2.5 Gb/s, even 10 Gb/s on Computers and Electrical Engineering 28 (2002) [323][324][325][326][327][328][329][330][331][332][333][334] www.elsevier.com/locate/compeleceng only one wavelength, a new generation system, conceived in 1990, initiated wavelength multiplexing (optical wavelength division multiplexing, OWDM) [3].…”