Fractional lambda switching: Difference between revisions

Revision as of 06:44, 10 March 2009

Revision as of 06:59, 10 March 2009

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Fractional lambda switching (FλS)

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[M. Baldi|http://www.mario-baldi.net M. Baldi], "Fractional Lambda Switching for the Next Generation Internet," The Optical Next-Generation Internet Workshop, IEEE International Conference on Communications (ICC2001), Helsinki, Finland, June 2001.

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[M. Baldi|http://www.mario-baldi.net M. Baldi], Y. Ofek, "[Fractional Lambda Switching|http://staff.polito.it/mario.baldi/publications/icc2002.pdf Fractional Lambda Switching]," IEEE International Conference on Communications (ICC2002), Optical Networking Symposium, New York, NY, USA, Apr. 2002, pp. 2692-2696.

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leverages on [[Time-driven switching]] ([[Time-Driven Switching|TDS]]) to realize sub-lambda switching in highly scalable dynamic optical networking

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[M. Baldi|http:www.mario-baldi.net M. Baldi], Y. Ofek, "[Realizing Dynamic Optical Networking|http://staff.polito.it/mario.baldi/publications/ONM2003.pdf Realizing Dynamic Optical Networking]," [Optical Networks Magazine|http://optical-networks.com/ Optical Networks Magazine], [http://www.springerlink.com/content/t87443j2276n0w26/?p=ee76836c03234578b4a3e08418d41461&pi=0 Special Issue "Dynamic Optical Networking: around the Corner or Light Years Away?"|http://www.springerlink.com/content/t87443j2276n0w26/?p=ee76836c03234578b4a3e08418d41461&pi=0], Vol. 4, No. 5, Sep./Oct. 2003, pp. 100-111.

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, which requires minimum (possibly optical) buffers. In this context, TDS has the same general objectives as optical burst switching and optical packet switching: realizing all-optical networks with high wavelength utilization. TFs can be viewed as virtual containers for multiple IP packets that are switched at every TDS switch based on and coordinated by the UTC signal. In the context of optical networks, SVPs are called fractional lambda pipes (FλPs). Since non-immediate forwarding requires buffering packets in network switches, with current optical technologies its extensive deployment in all-optical FλS switches would be expensive. However, limited non-immediate forwarding capability with support for small forwarding delays, i.e., small values of Dp, could be included in switches to decrease blocking probability. Although this will require optical buffering, its requirements in terms of size and access are far simpler than the one posed by optical bust switching and optical packet switching.