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Generalized Multi-Protocol Label Switching (GMPLS) based optical networks are viewed as a promising network infrastructure for the next generation network (NGN) development. By pre-configuring the resources of dynamic optical networks, we can reconstruct the physical topology, thus increase the number of direct routes between potentially heavily loaded physical node pairs and optimize the performance...
Localized Quality of Service (QoS) routing is a viable alternative to the QoS routing algorithms that use global network state information to make routing decisions. In localized QoS routing algorithms each source maintains a predetermined set of candidate paths for each destination and avoids the problems associated with the maintenance of global network state by using locally collected flow statistics...
In order to solve the scalability problem of QoS routing in large networks, hierarchical networks and hierarchical routing are proposed. There are tow key issues in hierarchical multicast routing (HMR): one is topology aggregation (TA), and the other is multicast tree state aggregation (MTSA). And the latter is discussed deeply in this paper. The main contributions of this paper include: multicast...
In this paper, we propose two efficient topology aggregation (TA) methods to deal with the scalability problem of hierarchical quality of services (QoS) routing. Our methods first use line fitting staircase or quadratic curve fitting staircase to approximate the original service staircase in the full mesh compaction. Then we respectively transform the restrictive parameters and the additive parameters...
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