NDLI: Burst contention avoidance schemes in hybrid GMPLS-enabled OBS/OCS optical networks

Content Provider	IEEE Xplore Digital Library
Author	Perello, J. Spadaro, S. Comellas, J. Junyent, G.
Copyright Year	2009
Description	Author affiliation: Optical Communications Group (GCO), Signal Theory and Communications Department (TSC), Universitat Politècnica de Catalunya (UPC), Jordi Girona 1-3, 08034 Barcelona (Spain) (Perello, J.; Spadaro, S.; Comellas, J.; Junyent, G.)
Abstract	Hybrid optical network architectures, combining benefits of optical circuit and burst switching technologies, become a natural evolution to improve overall network performance while reducing related costs. This paper concentrates on preventive contention avoidance schemes to decrease burst loss probability at the OBS layer of such hybrid network scenarios. Into operation, the proposed solution locally reacts to highly loaded downstream node situations by preventively deflecting bursts through a less loaded neighbor. Two different approaches for disseminating adjacent nodes state information are presented and extensively evaluated. In the first approach, current node state information is propagated downstream in the burst control packet, keeping pace with OBS traffic dynamics. The second approach targets at lower control overhead. In this case, averaged node state statistics are included in the Hello messages of the GMPLS Link Management Protocol (LMP) protocol, which are exchanged between neighboring nodes over the OCS control layer every 150 ms. The obtained results validate the applicability of both approaches. Moreover, they indicate that, depending on the mean burst size, either one or the other approach is favorable.
Starting Page	1
Ending Page	6
File Size	1288627
Page Count	6
File Format	PDF
ISBN	9781424441877
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-02-18
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	IFIP
Subject Keyword	Protocols Bandwidth Optical fiber networks Wavelength division multiplexing Optical fiber communication Data communication Burst switching Optical packet switching Next generation networking Switching circuits
Content Type	Text
Resource Type	Article

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