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Experimental Analysis on GMPLS-Based Photonic Switching Networks
IEICE TRANSACTIONS on Communications
Publication Date: 2003/08/01
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Photonic IP Network Technologies for Next Generation Broadband Access)
photonic switching, resilient control plane, generalized multi-protocol label switching (GMPLS), photonic cross connect (PXC),
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Implementation issues on generalized multi-protocol label switching (GMPLS) -based photonic switching networks are experimentally analyzed. A resilient control plane architecture using in-fiber and out-of-fiber control channels is proposed to resolve issues of establishing the control plane in out-of-band networks. The resilient control plane is demonstrated in a photonic cross-connect (PXC) -based GMPLS network involving a 1,000 km transmission line. Fast signaling for provisioning and restoration operation is accomplished by implementing in-fiber control channels as primary, and the out-of-fiber control channels effectively operate as secondary and restore messaging of the control information between neighbors. The control channel protection is initiated by the link management protocol (LMP). Using the test bed, optical layer routing operation is investigated to assess the effects on the signal quality of wavelength paths, and transparent routing of the wavelength paths over one-hop and two-hops route is demonstrated within 1 dB difference regarding the Q factor. Stable operation of loss of light (LOL) -triggered restoration is demonstrated by setting the optical level threshold 5 dB higher than the amplified spontaneous emission (ASE) noise level.