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We investigate the problem of provisioning light-paths for dynamic advance reservation (AR) requests in all-optical wavelength division multiplexed networks. We propose a two-phase novel routing, slot, and wavelength assignment (RWSA) technique called Non-Continuous Single-Slot Advance Reservation (NC-SSAR). We propose two NC-SSAR heuristics, one with only lightpath segmentation (SEG-NC-SSAR) and the other with lightpath segmentation and lightpath switching (LPS-NC-SSAR). We briefly discuss three baseline RWSA heuristics and compare them with the proposed heuristics. Through extensive simulations, we show that the proposed NC-SSAR heuristics can solve the RWSA problem more effectively and efficiently by providing significantly lower blocking and reducing the overall signaling in the network by minimizing the number of lightpath switches, compared to the baseline RWSA heuristics.