Optical transport networks (OTN) must be prepared in terms of better resource utilization, for accommodating unicast and multicast traffic together. Light-trees have been proposed for supporting multicast connections in OTN. Nevertheless when traffic grooming is applied in light-trees, resources can be underutilized as traffic can be routed to undesirable destinations in order to avoid optical-electrical-optical (OEO) conversions. In this paper, a novel architecture named S/G light- tree for supporting unicast/multicast connections is proposed. The architecture allows traffic dropping and aggregation in different wavelengths without performing OEO conversions. A heuristic that routes traffic demands using less wavelengths by taking advantage of the proposed architecture is designed as well. Simulation results show that the architecture can minimize the number of used wavelengths and OEO conversions when compared to light-trees
展开▼
机译：为了更好地利用资源，必须准备光传输网络（OTN），以便一起容纳单播和多播流量。已经提出了光树来支持OTN中的多播连接。然而，当在轻树中应用流量疏导时，由于可以将流量路由到不希望的目的地，从而避免了光电（OEO）转换，因此资源可能没有得到充分利用。在本文中，提出了一种新颖的名为S / G lighttree的体系结构，用于支持单播/多播连接。该体系结构允许在不同波长下的流量丢弃和聚合，而无需执行OEO转换。还设计了一种启发式方法，可以利用所提出的体系结构使用更少的波长来路由流量需求。仿真结果表明，与光树相比，该体系结构可以最大程度地减少使用的波长和OEO转换数量
展开▼
