ࡱ> 130} |bjbj55 .__|||tp #\RV?@Pt`v(: 0xn#bn#n#~(n#| : Marco Ruffini Donal OMahony CTVR, University of Dublin, Trinity College Optical scenario: Scenario: A group of researchers has designed a novel optical router that makes use of an enhanced IP-router together with a reconfigurable photonic switch. Such a scenario involves testing of different layers at the same time (the IP and the optical layers). The IP layer development might involve new routing paradigms (e.g., flow-based routing), different addressing schemes, distributed algorithms for route calculation, signaling protocols for bandwidth reservation, etc. The optical layer might involve an electrical controller (which computes algorithms for wavelength routing and selection, i.e. RWA), a photonic switch for fast wavelength switching and additional devices for optical signal regeneration (e.g., optical amplification, dispersion compensation, etc.). The electronic operations of the two layers exchange information following a cross-layer optimization approach. Specification: The researcher will specify the following aspects of the experiment: Network topology: node location, link characteristics (at the different layers, e.g. MPLS, Ethernet, Physical), domain organization. Nodes configuration: Software: e.g., OS, software router type (e.g., Xorp, Quagga, etc.) Hardware: e.g., number and type of ports per node; optical switch characteristics (ports, switching time); WDM link capacity; devices for signal regeneration (dispersion compensation, amplification, etc.). Traffic load: traffic generator and/or real applications. Event timing: control of specific events like simulation of fiber cut (loss of light), sudden decrease of signal quality (BER deterioration). Experimental data to collect: e.g., generic measurements (packet loss, average TCP transfer time, router congestion) and specific measurements for the technology examined (e.g., BER of specific channels, path restoration time). Run experiment: same as scenario 1 Variants: change topology (e.g. move scenario from core network to access network). change traffic/application type (e.g., from simulated traffic or real legacy applications, to high-end grid-based applications). 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