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Split reservation protocols using multiple wavelengths (SRPM) in dense WDM optical networks

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3 Author(s)
Sengupta, M. ; Dept. of Comput. Sci. & Eng., Kalyani Gov. Eng. Coll., Kalyani, India ; Mondal, S.K. ; Saha, D.

In GMPLS based WDM optical networks, a suitable signaling protocol is used to dynamically set up lightpaths. An important step, apart from routing and wavelength selection, in lightpath establishment is wavelength reservation. Protocols for wavelength reservation, as a part of signaling protocols, aim to minimize the blocking of lightpaths, which arises due to unavailability of wavelengths resulting from scarcity of wavelengths and/or collision of wavelengths. Since uni-wavelength reservation techniques attempt to reserve single wavelength, probability of blocking is more in them, compared to multi-wavelength reservation methods that scouts multiple wavelengths for reservation. In this work, we combine multi-wavelength reservation with dynamic splitting (at intermediate nodes) to propose two new protocols: Multi-wavelength Split Reservation Protocol with aggressiveness (SRPM-a) and Multi-wavelength Split Reservation Protocol with retry (SRPM-r). A comparative study with other analogous wavelength reservation protocols reveals that the proposed two protocols perform better than their peers. However, between them, SRPM-r performs considerably better than SRPM-a typically in dense WDM networks.

Published in:

Communication Systems and Networks (COMSNETS), 2012 Fourth International Conference on

Date of Conference:

3-7 Jan. 2012