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The AWG∥PSC network:a performance-enhanced single-hop WDM network with heterogeneous protection

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3 Author(s)
Fan, C. ; Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA ; Maier, M. ; Reisslein, M.

Single-hop wavelength-division-multiplexing (WDM) networks based on a central passive star coupler (PSC) or arrayed-waveguide grating (AWG) hub have received a great deal of attention as promising solutions for the quickly increasing traffic in metropolitan and local area networks. These single-hop networks suffer from a single point of failure: if the central hub fails, then all network connectivity is lost. To address this single point of failure in an efficient manner, we propose a novel single-hop WDM network, the AWG||PSC network. The AWG||PSC network consists of an AWG in parallel with a PSC. The AWG and PSC provide heterogeneous protection for each other; the AWG||PSC network remains functional when either the AWG or the PSC fails. If both AWG and PSC are functional, the AWG||PSC network uniquely combines the respective strengths of the two devices. By means of analysis and verifying simulations we find that the throughput of the AWG||PSC network is significantly larger than the total throughput obtained by combining the throughput of a stand-alone AWG network with the throughput of a stand-alone PSC network. We also find that the AWG||PSC network gives over a wide operating range a better throughput-delay performance than a network consisting of either two load sharing PSCs in parallel or two load sharing AWGs in parallel.

Published in:

Lightwave Technology, Journal of  (Volume:22 ,  Issue: 5 )

Date of Publication:

May 2004

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