Title :
Survivable traffic grooming in WDM ring networks
Author :
Sankaranarayanan, Sriram ; Subramaniam, Suresh ; Hongsik Choi ; Hyeong-Ah Choi
Author_Institution :
Qualconini Inc., San Diego, CA, USA
fDate :
3/1/2007 12:00:00 AM
Abstract :
Traffic grooming, in which low-rate circuits are multiplexed onto wavelengths, with the goal of minimizing the number of add-drop multiplexers (ADMs) and wavelengths has received much research attention from the optical networking community in recent years. While previous work has considered various traffic models and network architectures, protection requirements of the circuits have not been considered. In this paper, we consider survivable traffic grooming, or grooming traffic which contains a mix of circuits that need protection and that do not need protection. We assume a unidirectional ring network with all-to-all symmetric traffic with t >; 1 circuits between each node pair, of which s require protection. As it turns out, survivable traffic grooming presents a significant tradeoff between the number of wavelengths and the number of ADMs, which is almost non-existent in non-survivable traffic grooming for this type of traffic. We explore this tradeoff for some specific cases in this paper. We also present some new results and solution methods for solving certain non-survivable traffic grooming problems.
Keywords :
optical communication; wavelength division multiplexing; WDM ring networks; add-drop multiplexers; all-to-all symmetric traffic; low-rate circuits; network architectures; optical networking community; survivable traffic grooming; unidirectional ring network; Integrated circuit modeling; Optical fiber networks; Optical switches; SONET; WDM networks; Add-drop multiplexers; all-to-all traffic; circuits; lightpaths; optical networks; ring networks; survivability; traffic grooming; wavelength-division-multiplexing (WDM);
Journal_Title :
Communications and Networks, Journal of
DOI :
10.1109/JCN.2007.6182818