On the number of wavelengths and switches in all-optical networks
Abstract
We consider optical networks using wavelength division multiplexing, where the path a signal takes is determined by the network switches, the wavelength of the signal, and the location the signal originated. Therefore, a signal is routed through a combination of circuit switching and wavelength routing (assigning it a wavelength). We present a bound on the minimum number of wavelengths needed based on the connectivity requirements of the users and the number of switching states. In addition, we present a lower bound on the number of switching states in a network using a combination of circuit switching, wavelength routing, and frequency changing. The bounds hold for all networks with switches, wavelength routing, and wavelength changing devices. Several examples are presented including a network with near optimal wavelength reuse.
- Publication:
-
IEEE Transactions on Communications
- Pub Date:
- February 1994
- Bibcode:
- 1994ITCom..42..583B
- Keywords:
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- Communication Networks;
- Critical Path Method;
- Fiber Optics;
- Optical Communication;
- Optical Switching;
- Signal Detection;
- Switching Circuits;
- Wavelength Division Multiplexing;
- Reuse;
- Systems Analysis;
- Wavelengths;
- Communications and Radar