A new wavelength assignment algorithm in an optical unidirectional ring with realistic wavelength conversion

Wavelength converters are usually used for improving the performance of WDM optical networks. From the viewpoint of network economics and current tech nologies, the wavelength converters with a limited conversion range are nec essary to be used sparsely in real applications. However, there have been l ittle efforts for developing wavelength assignment algorithm that achieves a guaranteed high performance with either limited or sparse wavelength conv ersion. In this paper, we propose a new wavelength assignment algorithm tha t can be applied to both sparse and limited wavelength conversion. Through the results of simulation program, we show that the proposed algorithm outp erforms other ones presented until now.