Abstract: We propose a new routing method called wavelength-separating method in DWDM optical packet switching nodes for two-class priority traffics. Analytical models of the method and a buffer-sharing method with special contention control are derived. The optimized results of the two methods show that the wavelength-separating method achieves a better improvement of the packet loss rate (PLR) than the buffer-sharing method in the case of full wavelength conversion and small output buffer length.

Key words: optical packet switching, output buffer, wavelength conversion
, DWDM