Dynamic traffic grooming in interconnected WDM SDH/SONET rings
Jie Xu, Qingji Zeng
Abstract
Jie Xu, Qingji Zeng
Abstract
Recently, wavelength division multiplexing (WDM) technology has been widely employed to increase the capacity of existing SDH/SONET self-healing rings. As wavelengths are no longer such precious resources, SDH/SONET add-drop multiplexers (ADMs) become the dominant cost factor in network deployment. Traffic grooming studies how to intelligently arranging the placement of ADMs on wavelengths to reduce the number of ADMs required to support certain traffic patterns. In this paper, we address dynamic traffic grooming in interconnected WDM unidirectional rings. An optically interconnected dual-homing strategy is adopted to implement optical layer survivability. A genetic algorithm (GA) based approach is proposed for static traffic grooming. Another GA based approach is proposed for combining different topologies to support a given traffic set. Numerical results were reported on ADM savings.
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Recently, wavelength division multiplexing (WDM) technology has been widely employed to increase the capacity of existing SDH/SONET self-healing rings. As wavelengths are no longer such precious resources, SDH/SONET add-drop multiplexers (ADMs) become the dominant cost factor in network deployment. Traffic grooming studies how to intelligently arranging the placement of ADMs on wavelengths to reduce the number of ADMs required to support certain traffic patterns. In this paper, we address dynamic traffic grooming in interconnected WDM unidirectional rings. An optically interconnected dual-homing strategy is adopted to implement optical layer survivability. A genetic algorithm (GA) based approach is proposed for static traffic grooming. Another GA based approach is proposed for combining different topologies to support a given traffic set. Numerical results were reported on ADM savings.
Key concepts: Synchronous optical networking, Traffic grooming, Computer network, Wavelength-division multiplexing, Multiplexer, Optical mesh network, Network topology, Computer science