A novel online wavelength assignment algorithm in wavelength-convertible multi-granular optical networks |
| |
Authors: | Ching-Fang Hsu Fang-Sheng Lin |
| |
Institution: | (1) Department of Computer Science and Information Engineering, National Cheng Kung University, 1, Ta-Hsueh Road, Tainan, 701, Taiwan;(2) Alpha Imaging Technology Corp., Jubei, Taiwan |
| |
Abstract: | As industrial technology gets more mature, a single fiber can offer more and more wavelengths. However, it also results in
a large amount of switching ports at optical cross-connects (OXCs). Certainly, it is expected that higher and higher complexity
is inevitable to control and manage such large OXCs. In this paper, we study the dynamic wavelength assignment problem in
waveband switching (WBS) networks composed of multi-granular OXCs (MG-OXCs). Moreover, in order to relax the wavelength continuity
constraint on lightpath establishments, each MG-OXC node is equipped with a certain number of converters. To efficiently minimize
the extra port consumption and utilize wavelength converters, we proposed an online wavelength assignment algorithm named
Least Weighted Configuration Cost (LWCC). For a new request, LWCC first adopts fixed routing and then exploits the layered-graph approach and a new cost function
for edge weight assignment to determine adequate wavelength(s). The performance metrics of interest include both blocking
performance and converter utilization. Numerical results show that LWCC is superior in waveband grouping and therefore results
in significant performance gain in terms of blocking probability.
|
| |
Keywords: | Waveband switching (WBS) Wavelength assignment Optical cross-connect (OXC) Multi-granular OXC (MG-OXC) |
本文献已被 SpringerLink 等数据库收录! |
|