Summary: A Comparative Study of Limited Range
Wavelength Conversion Policies for
Asynchronous Optical Packet Switching
Kaan Dogan a , Yavuz Gunalay b , and Nail Akar a
a Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey
b Faculty of Business Administration, Bilkent University, Ankara, Turkey
akar@ee.bilkent.edu.tr
In this paper, we study an asynchronous optical packet switching node
equipped with a number of limited range wavelength converters shared
per output link. We both study circular and non­circular limited range
wavelength conversion schemes. A wavelength conversion policy governs
the selection of the outgoing wavelength for an optical packet if the
incoming wavelength is in use. Through simulations, we show that the
so­called ``far conversion'' policy in which the optical packet is switched
onto the farthest available wavelength in the tuning range, outperforms
the other policies we studied. We point out the ``clustering e#ect'' in
the use of wavelengths to explain this phenomenon. We also provide an
approximate analytical method to find the packet blocking probability
in circular­type limited range wavelength conversion systems which
practically serves as a lower bound for all the conversion policies we

Source: Akar, Nail - Department of Electrical and Electronics Engineering, Bilkent University

Collections: Engineering