Impact of intermediate traffic grouping on the dimensioning of multi-granularity optical networks

Dynamic Waveband Switching in WDM Mesh Networks Based on a Generic Auxiliary Graph Model

“…The previous studies [4][5][6][7][8] on the performance analysis of WBS focus mainly on the static case, where the traffic pattern and loads are fixed, and provide evidences for the efficiency of WBS both in qualitative and quantitative ways. The studies in [4] and [6] show that a waveband-route along the MG-OXCs can reduce the total number of ports used (given the amount of traffic) compared to the corresponding wavelength-routes using only OXCs if the link count is greater than 2.…”

“…Whether the heuristic algorithms are optimal in a dynamic WBS network is unknown. In [5], a classification of end-to-end WBS routing and intermediate WBS routing is proposed and the authors emphasize that their study only focuses on the end-to-end case in static WBS networks. In [6], the authors propose a non-uniform algorithm for a network carrying Zipf distributed traffic.…”

“…Because of the large bandwidth (e.g., OC-192 or 10 Gbps, and OC-768 or 40 Gbps) of a wavelength channel and the large number of wavelength channels (e.g., 64 and 160) in a fiber, WDM is the most viable technique for widearea backbone networks. To reduce the switching and transmission costs in the optical domain of a WDM network, waveband switching (WBS) has been proposed as an efficient solution in [4][5][6]. Using waveband switching, a set of wavelengths is aggregated into a waveband (wavelength band) at the source optical crossconnect (OXC), transmitted as a whole along the intermediate OXCs, and disaggregated back into wavelengths at the destination OXC.…”

“…Most previous studies on WBS focused either on analyzing the performance improvement by using the WBS technique, such as [4][5][6][7][8][9], or on proving the feasibility of waveband switching technique, such as [10][11][12][13][14][15]. While previous studies on the performance analysis of the WBS technique consider the static case, where the traffic pattern and loads are fixed, how the WBS technique reduces the switching and transmission costs under dynamic traffic requests remains an open problem.…”

A novel online wavelength assignment algorithm in wavelength-convertible multi-granular optical networks

“…The more wavelengths a fiber link can offer, the more complex and expensive the control and management of OXCs become. Fortunately, the emergence of waveband switching (WBS) technique furnishes a solution to this problem [2,9,13,17,18]. With WBS technology, OXCs can efficiently aggregate a group of wavelengths into a waveband and transmit them as a unity as long as no wavelength dropping, addition, and extraction are required.…”