Cost-effective control plane design for optical sub-wavelength switched ring network

Optical sub-wavelength switched networks have been attracting attention as a cost-effective solution, especially for bursty metro-area networks. Although such networks fully use wavelength capacity and provide bandwidth flexibility, a stable and/or robust control plane is necessary for dynamic control scenarios. Moreover, the required resources for the control channel are considerable when we aim at high-frequent information gathering to achieve on-demand follow-up control. In this paper, we propose a cost-effective control plane design method for efficient traffic accommodation in future metro networks. This method uses a control-signal mediator that can efficiently suppress the required bandwidth resources.