Dynamic routing and wavelength assignment scheme using signaling of backward reservation in multifiber WDM networks

This paper proposes a dynamic routing and wavelength assignment (RWA) scheme using signaling of backward reservation in multifiber WDM networks. In the proposed scheme, information on link state is collected by signaling of backward reservation along multiple routes between a sender node and a receiver node whenever a new lightpath-setup request arrives. Then the proposed scheme selects a combination of a route and a wavelength at the receiver node based on the collected information in such a way that it makes wavelength usage in the routes smooth. Through simulation experiments, we show that the proposed scheme efficiently improves blocking probability of lightpath establishments in multifiber WDM optical networks.