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Network operators want to deliver multiple services to the end customers. This leads to the need of efficient transport of data using optical network technologies. OBS is a promising technology for metro networks, where the operator can locate their servers to provide services such as video, backup or PC virtualization. These services are competing for shared network bandwidth when running in parallel...
In this paper, a novel and optimized virtual optical network (VON) composition method, aware of the impact of physical layer impairments (PLIs), is investigated. VONs are composed using Mixed Integer Linear Programming (MILP), which can provide optimal solutions for VON composition. The quality of the composed VONs is verified by adopting an analytical assessment model of PLIs. In order to improve...
About 94 technical papers were submitted by researchers from all over the world which were peer reviewed by members of the Technical Program Committee and external reviewers. The 52 accepted contributions, together with 8 invited papers and 3 keynote talks, were organised into 10 oral technical sessions and a poster session.
High-capacity networks based on optical technologies enable global delivery of high-performance network-based applications driven by Future Internet services. Due to the accelerated evolution of these applications, dynamic adaptability of the underlying optical infrastructure becomes crucial to support efficient data transport through the operators' networks. Optical network virtualization can be...
The optical cross-connect (OXC) is a key element in current WDM networks. In this context, the design of OXCs is becoming very challenging since it has to fulfil requirements from legacy optical networks and be future-proof to support both legacy lower bitrates and future high-speed super-channels by means of flexible allocation of spectral resources. In this paper we review the novel concept of Architecture...
A novel Software/Hardware defIned NEtwork (SHINE) framework for future optical network is proposed in this paper. An FPGA based SHINE adaptive network element (SANE) carrying time shared optical network (TSON) service and 10G Ethernet service is implemented. A cross-platform C++/Qt based SHINE IDE incorporating fine/coarse granular instruction set is developed to simply compose node/network manually...
A key driver for the evolution of Future Media Networks (FMNs) is the emergence of beyond High Definition (HD) media formats. These formats impose far greater demands on networks for high-capacity, low latency and stringent Quality-of-Service (QoS) compared to other existing formats. In addition, their data-intensiveness will require real-time interconnection of multiple, possibly distributed, high...
A new flexible networking infrastructure able to provide on-demand services and functionalities is proposed. The benefits of the proposed approach in terms of scalability, resiliency and the flexibility to provide various levels of bandwidth virtualisation and arbitrary topology implementation are discussed in the paper.
A novel impairment aware optical network virtualization mechanism (Optical FlowVisor) based on software defined networking (OpenFlow-based) paradigm is experimentally demonstrated. End-to-end flow setup time and the performance of virtual switches and OpenFlow controller are reported.
The paper presents the architecture, implementation and evaluation of the flexible and finely granular Time Shared Optical Network metro node (TSON). The results show exceptional performance, throughput 95.38% of theoretical maximum, latency less than 160µsec and jitter less than 25µsec.
Hybrid GMPLS-OpenFlow and novel Extended OpenFlow approaches are presented and experimentally evaluated on a converged packet and circuit switching setup. Extended OpenFlow agents, controllers and network application are developed & their performance evaluated on commercial ROADMs for the first time.
An architecture that enables inter-working relationships between the entities in a networked media infrastructure for high-end applications is presented. An OpenFlow-enabled test-bed is demonstrated and results of evaluations carried out are reported.
Recently proposed Architecture on Demand (AoD) node shows considerable flexibility benefits against traditional ROADMs. We study the power consumption of AoD including sub-wavelength time switching functionality. Results show that AoD can bring energy savings at node level.
This paper proposes an innovative metro mesh optical node and a two-fold control plane architectural solution composed of vertically interoperable sub-wavelength enabled GMPLS and TSON layers. Experimental results demonstrate very high throughput (8.68 Gbps) low latency (<160 <s) and low (<25 <s) jitter performance of the node. GMPLS protocol extensions are also provided to support...
Novel impairment and cost aware optical network virtualization mechanisms are investigated over single-line-rate and mixed-line-rate optical networks. Fundamental challenges are addressed by the proposed virtual optical network composition mechanisms utilizing optimization algorithms.
Taking into account the unique features of Mixed-Line-Rate and Multiple-Modulation-Format WDM networks, the cost-, resource-, and impairment-aware virtual optical network (VON) composition methods are proposed, which can create cost-effective and transmission quality-guaranteed VONs while achieving high network resource utilization efficiency.
A novel metro network architecture for co-existing Fixed-Grid and Flex-Grid networks is proposed. It delivers adaptive resource allocation in time and frequency dimensions for Fixed-Grid sub-wavelength, wavelength, waveband and Flex-Grid super-channel services over AoD optical nodes. Fixed and Flex Grid sharing spectrum show improved performance.
We propose Architecture on Demand (AoD) composition of optical nodes and networks in order to adapt to BW, switching and processing requirements of traffic. This facilitates flexibility and modularity in the optical layer and is key enabler for elastic optical networking.
Cloud computing is a new model of consuming and delivering IT and infrastructure resources. It enables users to obtain what they need, as they need it, from advanced applications to IT infrastructure and platform services, including virtual infrastructure, servers and storage. It can provide significant economies of scale and greater business agility, while accelerating the pace of innovation. Network...
This paper presents the performance of a proposed QoS provisioning scheme - the Classified Cloning Scheme - when incoming traffic to the OBS network is self-similar. Intensive simulations were conducted using ns-2, after developing new modules for evaluation purposes. The self-similarity of the incoming traffic is depicted via cumulative distribution functions of the inter-arrival time for incoming...
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