Optimized QoS protection of Ethernet trees

摘要: Ethernet is being increasingly employed in metro networks. gives routing schemes and protocols for building up trees, instance STP, RSTP MSTP. It also implies simple restoration mechanisms. In this paper we propose an optimization framework, where the MSTP trees are protected QoS guaranteed even after a failure. The based not only on topology, but it takes traffic conditions constraints into account. numerical results show that proposed significantly increases throughput of network. best result can be achieved when preemption assumed, i.e., effort may remain unprotected, high priority one. This way realized at normal operation, while still protects prioritized case Furthermore, protection mechanisms act faster than standard mechanism resulting shorter out-of-service times, therefore higher availability.