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Wavelength Division Multiplexing (WDM) technology multiplexes optical signals that take different wavelengths into the optical fiber, and offers a high bandwidth transmission. As an application of the WDM technology to the Internet, several network architectures have been discussed; packet-based architecture such as IP over WDM and path-based architecture that establishes a lightpath between nodes on-demand basis. In this paper, the authors consider a packet/path integration for WDM-based optical networks. The main advantage of the packet/path integration is to enjoy strengths of both packet switching paradigm and circuit switching paradigm.
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