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ABSTRACT: An enhanced hybrid scheme of wavelength reservation for dynamic wavelength routed optical networks is proposed. The performance of a newly introduced composite-two-phase reservation protocol (C2P-RP) is evaluated and compared with the existing hybrid reservation protocol. By offering connection requests an enhanced scope of finding an end-to-end available wavelength, the C2P-RP scheme shows improved connection-request blocking performance.
Electronics Letters 10/2009; · 0.96 Impact Factor
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ABSTRACT: Transparent optical networks offer a common transport platform for services with different bit-rates, transmission formats and technologies. In such a heterogeneous scenario, it is an inefficient use of network resource to provision end-to-end lightpaths without considering the different optical performance requirements of the different service interfaces. This paper proposes an efficient routing and wavelength assignment algorithm, based on service interface tolerance to optical noise and chromatic dispersion that allocates a lightpath with just enough end-to-end optical signal integrity for the connecting service. We investigate its performance in transparent optical networks with heterogeneous services at 10 and 40-Gb/s. For 40-Gb/s services, optical duobinary (ODB) and RZ-DQPSK modulation formats are assumed. We demonstrate that network blocking can significantly be reduced by the proposed algorithm.
Broadband Communications, Networks and Systems, 2008. BROADNETS 2008. 5th International Conference on; 10/2008
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ABSTRACT: The analysis of a shared-per-node OPS switch employing parametric wavelength converters (SPN-PWC) is reported. The results demonstrate a 38 - 63% reduction in the number of converters when SPN-PWC is compared with SPN employing single-channel wavelength converters.
Photonics in Switching, 2008. PS 2008. International Conference on; 09/2008
