NDLI: Traffic Intensity Based Fixed-Alternate Routing in All-Optical WDM Networks

Content Provider	IEEE Xplore Digital Library
Author	Hwa-Chun Lin Sheng-Wei Wang Chung-Peng Tsai
Copyright Year	2006
Description	Author affiliation: Department of Computer Science, National Tsing Hua University, Hsinchu 30043, TAIWAN (Hwa-Chun Lin; Chung-Peng Tsai) \|\| Institute of Communications Engineering, National Tsing Hua University, Hsinchu 30043, TAIWAN (Sheng-Wei Wang)
Abstract	This paper proposes a new fixed-alternate routing algorithm for all-optical WDM networks without wavelength conversion in order to reduce the connection blocking probability. The key idea in the proposed fixed-alternate routing algorithm is to try to route the traffics in approximately the optimal way. The multiple routing paths between each source-destination pair are arranged and used in descending order according to the traffic intensities obtained by solving a nonlinear multicommodity flow optimization problem. It is well known that finding the connection blocking probability is a very difficult task. Therefore, an objective function closely related to the connection probability is devised and used to formulate a nonlinear multicommodity flow optimization problem. Simulations are performed to study the performance of the proposed fixed-alternate routing algorithm. Our simulation results show that sorting the routing paths according to the optimally assigned traffic intensities in the proposed fixed-alternate routing algorithm can effectively reduce the connection blocking probability compared with sorting the routing paths according to hop counts in a typical fixed-alternate routing algorithm. In general, in all-optical WDM networks, a connection request that goes through a longer path experiences higher connection blocking probability than a connection request that goes through a shorter path. This is known as the fairness problem. Our simulation results show that the proposed algorithm yields better fairness than a typical fixed-alternate routing algorithm.
Starting Page	2439
Ending Page	2446
File Size	170103
Page Count	8
File Format	PDF
ISBN	1424403553
ISSN	81649547
DOI	10.1109/ICC.2006.255146
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-06-11
Publisher Place	Turkey
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Telecommunication traffic WDM networks Optical wavelength conversion Wavelength routing Bandwidth Optical switches Wavelength conversion Optical fiber networks Wavelength division multiplexing High speed optical techniques
Content Type	Text
Resource Type	Article

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