The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
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.
A PCE-based strategy for LSP re-optimization in flexgrid optical networks is experimentally validated. A front- and back-end stateful PCE architecture is deployed, wherein automatic and coordinated operations (e.g., computation delegation, database synchronization, etc.) are demonstrated using PCEP and BGP-LS protocols.
In-operation network planning consists in re-optimizing a network, currently being operated to transport traffic, either minimizing resource utilization or maximizing the transported traffic. In the context of flexgrid optical networks re-optimization includes spectrum defragmentation, virtual topology reconfiguration, etc. To perform in-operation planning, a centralized element in the control plane...
Software-Defined Networking and Network Functions Virtualisation has brought a revolution within the telecom market landscape. Initial proof-of-concept prototypes for NFV-enabled solutions are being developed at the same time SDN models are identified as the futures solutions within the telecom realm. We provide in this article an overview of the SDN/NFV technologies over optical networks, as well...
The requirement of executing network re-optimization operations to efficiently manage and deploy new generation flexgrid-based optical networks has brought to light the need of some specialized PCEs capable of performing such high time-consuming computations. The objective of such re-optimizations is to compute network reconfigurations to be done based on the current state of network resources to...
This paper presents an extended OpenFlow-based control plane for labeled optical burst switching networks to achieve application-aware burst assembly and scheduling, and experimental demonstration verifies its overall feasibility.
We propose the first optical SDN model enabling performance optimization and comparison of heterogeneous SDN scenarios. We exploit it to minimize latency and compare cost for non-SDN, partial-SDN and full-SDN variants of the same network.
We demonstrate for the first time enhanced software defined networking (eSDN) over elastic grid (eGrid) optical networks for data center service migration, the performance of which are first verified on our testbed with real prototypes.
We present a novel architecture for Cross Stratum Optimization of application and network resource with OpenFlow protocol. Several global load balancing strategies are proposed and demonstrated by experiments on Optical as a Service (OaaS) testbed.
The Path Computation Element (PCE) is a network entity utilized for network path computation operations, especially useful in optical networks based on wavelength division multiplexing (WDM). In the PCE paradigm, the communication between a node and the PCE is specified by the Path Computation Element Communication Protocol (PCEP). According to PCEP protocol, multiple LSP (Label Switched Path) requests...
This paper describes distributed scheduling based on schedule-aware network elements using switched path LSPs whose physical path may vary during service. This technology provides more reliable, more efficient service to better meet user needs.
A time-efficient resource optimization model for dynamic concurrent provisioning of connection requests at PCE is proposed. It is shown that a significant performance improvement can be achieved without noticeable increase in connection setup-time.
For automatically switched dynamic wavelength paths meeting traffic demands of metro/core networks, precise determination of physical impairments over such paths and appropriate configuration of their compensation capabilities are required. This paper discusses control protocol for impairment measurement and compensation configuration for wavelength paths based on the IETF's WSON standardization efforts.
An IA-RWA computation with QoT compensation based on double Cooperating PCEs is presented and extended AMSON testbed is verified. Two kinds of IA-RWA computation with QoT compensation strategies including Cooperating PCEs based and RSVP based strategies are demonstrated and compared.
Concurrent RWA algorithm for differentiated services to process multiple LSP bundles at PCE is proposed. Significant blocking probability reduction has been observed at the expense of slightly increased LSP setup-time compared to a sequential approach.
The efficient accommodation of sub-wavelength client flows on optical channels is a current challenge for resources use optimization in GMPLS controlled optical networks. While optical channels capacity usually exceeds 10 Gbit/s, client connections requests show finer granularity. This paper concentrates on the design and implementation of a GMPLS-controlled grooming capable transport infrastructure...
LSP requests may be bundled to improve the network optimization process at the expense of an increased connection setup delay. A detailed study is conducted to evaluate the pros and cons of the bundling approach.
Fault localization is becoming a critical issue in all-optical networks. The Limited Perimeter Vector Matching (LVM) protocol is a novel fault localization protocol for localizing single-link failures in all-optical networks. In this paper, we study the fault localization optimization problem by applying the LVM protocol where the traffic demands (or lightpath requests) are known a priori. Given the...
Fault localization is an important issue in all-optical networks. The Limited Perimeter Vector Matching (LVM) protocol is a novel fault localization protocol for localizing single-link failures in all-optical networks. In this paper, we study the fault localization optimization problem in applying the LVM protocol to static networks, where traffic (or lightpath) demand is known a priori. Given the...
The limited perimeter vector matching (LVM) protocol is a novel fault localization protocol for localizing single-link failures in all-optical networks. In this paper, we study the optimization problem to minimize fault localization time when applying the LVM protocol to static all-optical networks, where traffic demands (or lightpath requests) are known a priori. Given the traffic demands, the optimization...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.