NDLI: Burst rescheduling with wavelength and last-hop FDL reassignment in WDM optical burst switching networks

Content Provider	IEEE Xplore Digital Library
Author	Tan, S.K. Mohan, G. Chua, K.C.
Copyright Year	2003
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore (Tan, S.K.; Mohan, G.; Chua, K.C.)
Abstract	In this paper, we consider the problem of fast and efficient dynamic scheduling of bursts that belong to different classes of priority in wavelength-division multiplexing (WDM)-based optical burst switching (OBS) networks with limited optical buffers. In OBS networks, control and data components of a burst are sent separately with a time gap to ensure that resources such as wavelengths and fiber delay lines (FDLs) are reserved at various nodes before the data burst arrives. A scheduling algorithm with attractive features such as computational simplicity and efficient resource utilization is mandatory to quickly handle dynamic burst traffic and reduce burst dropping probability. While void filling algorithms achieve good burst dropping performance they are computationally complex. We propose burst rescheduling as an alternative to void filling which can do fast scheduling without requiring to examine and fill voids and at the same time can achieve good performance. Burst rescheduling uses two mechanisms known as wavelength reassignment and lasthop FDL reassignment. We develop a scheduling algorithm using the above rescheduling mechanisms called burst rescheduling with wavelength and last-hop FDL reassignment (BR-WFR) which is computationally simpler than a void filling algorithm. We then discuss the signalling overhead and feasibility of implementing burst rescheduling. Through simulation experiments we demonstrate the effectiveness of the proposed burst rescheduling algorithm.
Starting Page	1448
Ending Page	1452
File Size	249813
Page Count	5
File Format	PDF
ISBN	0780378024
DOI	10.1109/ICC.2003.1204630
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-05-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wavelength division multiplexing Optical burst switching Scheduling algorithm Filling Dynamic scheduling Optical buffering Delay lines Resource management Processor scheduling Computational modeling
Content Type	Text
Resource Type	Article

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