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Aiming at providing united control of multi-domain optical networks orchestration, we design the Federated Platform based on Open Network Operating System (ONOS). Our implementation includes adding and extending modules in ONOS to provide the global view of multi-domain networks and support cross-domain end-to-end services by communicating with the individual domain controllers through RESTCONF protocol...
With the growth of cloud computing and data center (DC), data center networks (DCNs) is becoming an increasingly important part in the future networks. However, large-scale disasters are considered as the main problems in terms of network survivability. Therefore, we propose a data center recovery algorithm to protect the majority of customer service as soon as possible. This algorithm can maximize...
We propose a survivable routing and resource assignment scheme with MPP and SRLG in VON to get less resources consumption and enough protection against physical failure. 29% reduction in resource consumption can be achieved.
For large scale multi-domain elastic optical networks, we propose a combination of distributed and centralized control architecture (DC-CA) based on stateful hierarchical PCE. Experiment results are presented from DC-CA testbed and automated provisioning and recovery time of multi-fault are reported.
A perpendicular multi-layer (PML) architecture with multiple controllers and a dynamic orchestra plane (DOP) for multi-domain software defined optical networks is proposed in this paper. Cross-domain services with on-demand bandwidth can be deployed via unified interfaces provided by DOP. Practical capture of signal processing and emulation results are presented.
With the expansion of optical networks, the failure probability of dual-link failure has also improved, so it is urgent to find novel protection structures to deal with dual-link failure. In this paper, we mainly focus the protection structures to solve the problem. Firstly, we describe the scenarios and the problem of dual-link failure. Then, theory of pre-configured polyhedron (p-Poly) is introduced...
Based on the reasonable modeling of the spectrum consecutiveness around the node, the concept of node handling capacity is proposed which can effectively indicate the degree of spectrum fragmentation in flexible grid optical networks.
We construct k-regular and k-(edge)-connected structures for providing protection against multiple failures in optical transport networks. It improves the spare resources efficiency without increasing the complexity of design and implementation of protection mechanisms.
We propose two novel adaptive spectrum defragmentation algorithms in elastic optical networks by properly rerouting existing connections based on the evaluation of current network status, and numerical evaluation shown to be resource efficient.
A stateful PCE-based multi-link failure localization mechanism using fuzzy fault set is implemented in multi-domain large capacity optical networks. The novel localization mechanism has high scalability, speed and success rate compared with extended LVM protocol.
The inter-domain routing and wavelength assignment problem in Wavelength-switched optical network (WSON) is researched. A Parallel Ant Colony based Inter-domain Routing Optimization Algorithm is proposed to obtain the routing of global optimization. Compared with the previous approaches, the proposed algorithm can achieve the routing optimization under multi-constraint condition, and can acquire the...
As the survivable mapping is critical in IP-over-wavelength-division-multiplexing (WDM) network to guarantee the restorability of IP layer, provisioning survivability in network with dynamic traffic is essential. However, survivable mapping problem for dynamic traffic shows more complexity than that for static traffic: 1) How to guarantee a survivable mapping since the lightpath is established and...
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...
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...
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...
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.
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