Abstract:

The multi-granularity OXC can reduce the number of switching ports of the wavelength switching plane of the ordinary OXC in the DWDM network. But there is a tight coupling between the waveband switching plane and the wavelength switching plane in ordinary multi-granularity OXC. So the switching architecture of the ordinary multi-granularity OXC is complex. A new multi-granularity OXC is proposed. In this new architecture, the wavelength switching plane and waveband switching plane are independent. Therefore the switching architecture can be simplified and the number of switching ports of the wavelength switching plane can be reduced effectively. In order to increase the utilization of the waveband, a traffic grooming algorithm for this new architecture is proposed. Simulation results show that the traffic grooming algorithm can effectively decease the blocking possibility.

Key words: multi-granularity optical switching, waveband switching, traffic grooming