关键词: 光网络, 多播路由, 多约束, 光树, 业务量疏导

Abstract: In order to fully utilize the wavelength resources of the WDM (wavelength division multiplexing) optical networks, this paper proposes a multi-constrained multicast traffic grooming mechanism. According to a multi-constrained multicast light-tree establishing algorithm, this mechanism provides an effective solution to multicast traffic grooming in WDM optical networks under multi-constraints, including the number of optical transceivers, wavelength conversion capability and wavelength splitting capability. This paper evaluates the proposed traffic grooming mechanism based on the topology of the National Science Foundation Network of USA (NSFnet) and Pan-European Research and Education Network (GEANT). The simulation results show that the proposed mechanism can not only accomplish multicast traffic grooming effectively, but also gain a lower blocking proportion compared with the multi-hop traffic grooming mechanism.

Key words: optical networks, multicast routing, multi-constrained, light-tree, traffic grooming