Buffer-based Service Differentiation Scheme in Optical Burst Switching Networks

ABSTRACT In this paper, service differentiation scheme using optical buffer that is reduced in size with slow-light technology in optical burst switching networks is presented. In suggested scheme, each outport has buffer to store high-class burst only in case that all its wavelengths are occupied. When all wavelengths are being used, a new arriving high-class burst goes into the buffer and waits until a burst is serviced. As soon as a burst is serviced with a wavelength, the high-class burst at buffer is allocated to the free wavelength. In case that low-class burst is arriving under the same situation, it is not stored at the buffer but discarded. An analytical model is derived to analyze the performance of the suggested scheme and compare its performance with the conventional scheme such as preemption and deflection as well as no service differentiations. 키워드 : 서비스 차별화, 버퍼, 선취권, 우회경로, 광 버스트 스위치 Key word : Service Differentiation, Buffer, Preemption, Deflection Routing, Optical Burst SwitchJournal of the Korea Institute of Information andCommunication Engineering