Minimizing Reconfiguration Times of Optical Cross-Connects in Distributed Lightpath Establishment

A new scheme to mitigate the connection setup time and minimize the reconfiguration times of optical cross- connects (OXCs) for WDM optical networks is proposed in tins study. In tins new scheme, we consider the reconfiguration information of switch fabrics in the signaling protocol, winch designated as the signaling with switch fabric status (SWFS). Distributed reservation algorithms will reserve the wavelength with minimum of reconfiguration times of OXCs along the route. Simulation results indicate that our proposed schemes with switch fabrics status have the shorter setup time, lower switching ratio as well as better blocking performance than those of the classic schemes. Especially, the reservation schemes all have constant switching ratio under the environment on different switching delay of OXCs or different requests. Moreover, the proposed schemes with SWFS significantly reduce the number of switch fabrics that need to be reconfigured.