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The hierarchical routing and wavelength assignment problem in Automatic Switched Optical Network (ASON) is researched. Based on our analysis, three adaptive algorithms called MLLR (Multi-Layer Least Loaded Routing Algorithm), WMLCR (Wavelength-graph-based Multi-Layer Least Congestion Routing Algorithm) and BMR (Backtracking-based Multi-Layer Routing Algorithm) are proposed. A platform named AHORSP...
Transport multiple protocol label switching (transport-MPLS, T-MPLS) is one of networking schemes for packet transport network (PTN). It specifies a connection-oriented, packet-switched architecture for carrier class Ethernet. In order to evaluate the performance of T-MPLS network, we have to apply this technology to the real network topology with Internet-bound traffic (e.g., VoIP, P2P, Http). In...
The hierarchical routing infrastructure in automatic switched optical network (ASON) is researched. Three operational algorithms MLLR (multi-layer least loaded routing algorithm), MLCR (multi-layer least congestion routing algorithm) and MROB (multi-layer routing algorithm based on backtracking) are proposed. In these algorithms, the resource coordination and balancing of multi-domain and multilayer...
Three operational routing algorithms for hierarchical Automatically Switched Optical Networks (ASON) are proposed. Their effectiveness is demonstrated in terms of blocking probability and time performance on the simulation platform developed.
A network flow decomposition algorithm is proposed to achieve a lower block probability. The algorithm is designed to achieve a flow balance between domains, advertising TE information that is necessary for network to build a TED (Traffic Engineer Database) to calculate a suitable route for each service request for network optimization.
In this paper, we propose a novel routing algorithm, Rank Total wavelengths and Available wavelengths (RTAW), which dramatically reduces the flooding frequency while guarantees a low blocking rate. Compared with other algorithms, simulations are conducted to prove the benefits of this algorithm.
A routing architecture based on PCE has been designed for the large, multi-layer and multi-domain optical networks, and a PCE-based fast reroute algorithm has been proposed for multi-failures in multi-domain optical networks.
Iterative p-cycle configure model is proposed and also a platform is constructed in OPNET modeler to verify the performance of this algorithm. Simulation results show that the iterative p-cycle expansions can significantly improve the controlling bandwidth efficiency of the intelligent WDM networks.
A novel multi-domain L1VPN provisioning architecture is proposed based on service plane of the adaptive multi-services provisioning platform. Moreover, the architecture we proposed was experimentally demonstrated in our AMSON testbed.
An improved scheme of path selection for multi-layer network based on PCE and VNTM is present and evaluated on the simulation platform of NSFNET, which is used to avoid traffic redundancy caused by low layer's invisibility to the high layer.
Clock synchronization is an essential problem faced by packet transport network. PTP (precise time protocol) can be used to solve this problem. Its feasibility has been verified by related literatures. In this paper, we use the OPNET simulation platform to further study the key factors affect the clocks' accuracy of packet-based synchronization schemes, e.g., queuing disciplines, number of nodes that...
We developed a framework for constraint routing in multi-domain optical network which combines PCE with service plane. With the distributed routing computation characteristic of PCE and the adaptability of service plane for service attributes, the framework provides an optimal SLA-based constraint routing strategy. Experiment results verify our framework and strategy.
In large dynamic networks it is extremely difficult to maintain accurate routing information on all network nodes. We introduce a novel algorithm which can decrease the impact of the problem greatly. Simulations show that it improves the blocking performance significantly in optical networks with Conversion Capability.
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