Dynamic Routing and Wavelength Assignment in Wavelength Band Switching Optical Network
Date Issued
2004
Date
2004
Author(s)
Chen, Hsin-Hung
DOI
en-US
Abstract
Wavelength band switching (WBS) is a novel technique in optical networks. The main goal of WBS is to reduce the resource usage. It has been wildly discuss in the WBS network with static traffic, but not with dynamic. In this paper, we want to study the WBS network with dynamic traffic.
At first we prove the dynamic traffic is feasible in the WBS network. We list all the situations when a request comes. We prove that in all the situations, the dynamic add operation is feasible. We will explain the detail in the paper. And then we propose a routing and wavelength assignment (RWA) algorithm called minimum additional band usage (MABU) algorithm to handle the coming request. This algorithm will find a lightpath with good grouping effect. But, in the dynamic traffic, the network status will change all the time. After a series of add and remove operations, the lightpath with good grouping effect we allocate may become not good as before, we will illustrate these cases and propose the rearrangement policies to solve this problem. At last, we use simulation to evaluate the performance of MABU, comparing to other existing RWA. Besides, We simulate several network topologies and traffic type, trying to find the effect of topology to WBS.
Subjects
路由
光纖網路
WDM
optical networks
RWA
WBS
Type
thesis