Burst switching in ultra-high speed all-optical IP over DWDM network with and without buffers under linear and nonlinear effects

Dispersion due to linear chromatic and nonlinear effects of the single mode optical fibers are critical in ultra-high speed global optical Ethernet operating at 10Gb/s to 100Gb/s. This paper investigates the use of optical burst switching (OBS) to overcome the problem of blocking and contention under optical circuit switching, especially when the traffic load is heavy. The traffic transport characteristics of multi-wavelength-channels are studied with the channel bit rate of 2.5 Gb/s to 40 Gb/s in burst mode. OBS is demonstrated to minimize the blocking probability due to its statistical advantage to improve the throughput rate. Further a new core node architecture consisting of dynamic optical buffers and wavelength conversion is proposed for incorporating with an optical switching matrix for ultra-fast switching and routing of OBS packets. Blocking probabilities of the networking traffics are obtained for different bit rates under the effects of dispersion and with or without optical buffers for OBS.