Abstract：Wavelength continuity constraint leads to inefficient utilization of wavelength chan-nels and results in higher blocking probability in WDM optical transport networks. In order to weaken the inefficiency of the constraint, wavelength rerouting is used. Based on a wavelength graph model, the QoS-based wavelength rerouting strategy, dynamic selection method, is pro-posed. Simulation results of the network performance in different dynamic traffic loads are given. The results show that the method can not only meet the different QoS requirements of the client layer’s service, but also utilize the finite networking resources efficiently with reduced blocking probability.
2002, Vol. 24 
