Differential evolution optimization applied to the wavelength converters placement problem in all optical networks

2012 ◽  
Vol 56 (9) ◽  
pp. 2262-2275 ◽  
Author(s):  
Fernando Lezama ◽  
Gerardo Castañón ◽  
Ana Maria Sarmiento
Keyword(s):  
Differential Evolution ◽  
Optical Networks ◽  
Wavelength Converters ◽  
Placement Problem ◽  
All Optical

scholarly journals Design of all Optical Packet Switching Networks

2002 ◽  
Vol 7 (1) ◽  
pp. 1
Author(s):  
Hussein T. Mouftah
Keyword(s):  
Optical Networks ◽  
Large Scale ◽  
Optical Network ◽  
Optical Switches ◽  
Traffic Load ◽  
Wavelength Converters ◽  
Small Scale ◽  
Wavelength Converter ◽  
All Optical ◽  
The Impact

Optical switches and wavelength converters are recognized as two of the most important DWDM system components in future all-optical networks. Optical switches perform the key functions of flexible routing, reconfigurable optical cross-connect (OXC), network protection and restoration, etc. in optical networks. Wavelength Converters are used to shift one incoming wavelength to another outgoing wavelength when this needs to be done.  Always residing in optical switches, they can effectively alleviate the blocking probability and help solve contention happening at the output port of switches. The deployment of wavelength converters within optical switches provides robust routing, switching and network management in optical layer, which is critical to the emerging all-optical Internet. However, the high cost of wavelength converters at current stage of manufacturing technology has to be taken into consideration when we design node architectures for an optical network. Our research explores the efficiency of wavelength converters in a long-haul optical network at different degrees of traffic load by running a simulation. Then, we propose a new cost-effective way to optimally design wavelength-convertible switch so as to achieve higher network performance while still keeping the total network cost down. Meanwhile, the routing and wavelength assignment (RWA) algorithm used in the research is designed to be a generic one for both large-scale and small-scale traffic. Removing the constraint on the traffic load makes the RWA more adaptive and robust. When this new RWA works in conjunction with a newly introduced concept of wavelength-convertible switches, we shall explore the impact of large-scale traffic on the role of wavelength converter so as to determine the method towards optimal use of wavelength convertible switches for all-optical networks.  

Wavelength Converters Placement in All Optical Networks Using Particle Swarm Optimization

2005 ◽  
Vol 10 (1) ◽  
pp. 23-37 ◽  
Author(s):  
Choon Fang Teo ◽  
Yun Cie Foo ◽  
Su Fong Chien ◽  
Andy L.Y. Low ◽  
A.H. You ◽  
...  
Keyword(s):  
Particle Swarm Optimization ◽  
Optical Networks ◽  
Particle Swarm ◽  
Wavelength Converters ◽  
Swarm Optimization ◽  
All Optical
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