With the explosive growing of IP Data traffic

the carrier network is put forward to optical networks based on WDM technologies.And

accordingly several techniques have been proposed to improve the performance of the optical network

especially the control plane technology.Routing and Wavelength assignment (RWA) is one of the very important problems in WDM optical transmission network.Based on the conventional method named first fit (FF)

a novel and heuristic algorithm called joint first fit (JFF) schemes is proposed for dynamic wavelength assignment in optical control plane of WDM network.Simulation results show that blocking probability can be significantly reduced and wavelength resource can be more efficiently used compared with First-Fit (FF) algorithm.