134 research outputs found
Orchestration of IT/Cloud and Networks: From Inter-DC Interconnection to SDN/NFV 5G Services
The so-called 5G networks promise to be the foundations for the deployment of advanced services, conceived around the joint allocation and use of heterogeneous resources,including network, computing and storage. Resources are placed on remote locations constrained by the different service requirements, resulting in cloud infrastructures (as pool of resources) that need to be interconnected. The automation of the provisioning of such services relies on a generalized orchestra tion, defined as to the coherent coordination of heterogeneous systems, applied to common cases such as involving heterogeneous network domains in terms of control or data plane technologies, or cloud and network resources. Although cloud-computing platforms do
take into account the need to interconnect remote virtual machine instances, mostly rely on managing L2 overlays over L3 (IP). The integration with transport networks is still not fully achieved, including leveraging the advances in software defined networks and transmission. We start with an overview of network orchestration, considering different models; we extend them to take into account cloud manage ment while mentioning relevant existing initiatives and conclude with the NFV architecture
Beyond 5G Domainless Network Operation enabled by Multiband: Toward Optical Continuum Architectures
Both public and private innovation projects are targeting the design,
prototyping and demonstration of a novel end-to-end integrated packet-optical
transport architecture based on Multi-Band (MB) optical transmission and
switching networks. Essentially, MB is expected to be the next technological
evolution to deal with the traffic demand and service requirements of 5G mobile
networks, and beyond, in the most cost-effective manner. Thanks to MB
transmission, classical telco architectures segmented into hierarchical levels
and domains can move forward toward an optical network continuum, where edge
access nodes are all-optically interconnected with top-hierarchical nodes,
interfacing Content Delivery Networks (CDN) and Internet Exchange Points (IXP).
This article overviews the technological challenges and innovation requirements
to enable such an architectural shift of telco networks both from a data and
control and management planes
Improving IA-RWA algorithms in translucent networks by regenerator allocation
In this paper we present the impact of considering regenerator allocation when selecting routes and wavelengths in translucent networks. In the regular operation of translucent networks, i.e. with dynamic traffic, we assume that a certain number of 3R regenerators are installed in some nodes of the network. These regenerators break the optical transparency of the lightpaths, but allow establishing the optical connections with the required optical signal quality. We show the performance improvement of the MINCOD-Q IA-RWA algorithm when an efficient regenerator allocation policy is employed (optical regeneration is only performed when the signal quality goes bellow a pre-established threshold). Under this policy, the (extended) MINCOD-Q algorithm performs slightly better in terms of blocking probability, but and most important, this figure is obtained with a significant
reduction of the number of 3R regenerators installed in the network.Postprint (published version
Experimental SDN Control Solutions for Automatic Operations and Management of 5G Services in a Fixed Mobile Converged Packet-Optical Network
5G networks will impose network operators to
accommodate services demanding heterogeneous and stringent
requirements in terms of increased bandwidth, reduced latency,
higher availability, etc. as well as enabling emerging capabilities
such as slicing. Operators will be then forced to make notable
investments in their infrastructure but the revenue is not
envisaged to be proportional. Thereby, operators are seeking for
more cost-effective solutions to keep their competitiveness. An
appealing solution is to integrate all (broadband) services
including both fixed and mobile in a convergent way. This is
referred to as Fixed Mobile Convergence (FMC). FMC allows
seamlessly serving any kind of access service over the same
network infrastructure (access, aggregation and core) and relying
on common set of control and operation functions. To this end,
FMC leverages the benefits provided by Software Defined
Networking (SDN) and Network Function Virtualization (NFV).
First, we discuss some of the explored FMC solutions and
technologies, from both structural and functional perspectives
Next, focusing on a Multi-Layer (Packet and Optical) Aggregation
Network, we report two implemented and experimentally
validated SDN/NFV orchestration architectures providing feasibleThis work has been partially funded by the Spanish Ministry
MINECO projects DESTELLO (TEC2015-69256-R) and 5G-REFINE
(TEC2017-88373-R), and the EU H2020 5G TRANSFORMER project
(grant no. 761536)
Experimental study on the impact of regenerator placement strategies when dynamically provisioning in translucent GMPLS WSON networks
The impact of the regenerator placement strategies when dynamically provisioning
connections in translucent WSON is studied. The evaluation is experimentally conducted in the ADRENALINE testbed in terms of the connection blocking.Postprint (published version
Traffic Engineering enforcement in multi-domain SDN orchestration of Multi-Layer (packet/optical) networks
We introduce an SDN orchestration architecture to enable the introduction of E2E TE policies in a multi-domain, multi-layer network scenario. The ABNO is used as reference architecture for the SDN orchestration of packet/optical SDN controllers using Flow Service Classification. Grant numbers : EC's to the Spanish MINECO project FARO (TEC2012-38119).© 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Document type: Conference objec
Improving Security in Internet of Things with Software Defined Networking
Future Internet of Things (IoT) will connect to the Internet billions of heterogeneous smart devices with the capacity of interacting with the environment. Therefore, the proposed solutions from an IoT networking perspective must take into account the scalability of IoT nodes as well as the operational cost of deploying the networking infrastructure. This will generate a huge volume of data, which poses a tremendous challenge both from the transport, and processing of information point of view. Moreover, security issues appear, due to the fact that untrusted IoT devices are interconnected towards the aggregation networks. In this paper, we propose the usage of a Software- Defined Networking (SDN) framework for introducing security in IoT gateways. An experimental validation of the framework is proposed, resulting in the enforcement of network security at the network edge
Integrated SDN/NFV management and orchestration architecture for dynamic deployment of virtual SDN control instances for virtual tenant networks
Software-defined networking (SDN) and network function virtualization (NFV) have emerged as the most promising candidates for improving network function and protocol programmability and dynamic adjustment of network resources. On the one hand, SDN is responsible for providing an abstraction of network resources through well-defined application programming interfaces. This abstraction enables SDN to perform network virtualization, that is, to slice the physical infrastructure and create multiple coexisting application-specific virtual tenant networks (VTNs) with specific quality-of-service and service-level-agreement requirements, independent of the underlying optical transport technology and network protocols. On the other hand, the notion of NFV relates to deploying network functions that are typically deployed in specialized and dedicated hardware, as software instances [called virtual network functions (VNFs)] running on commodity servers (e.g., in data centers) through software virtualization techniques. Despite all the attention that has been given to virtualizing IP functions (e.g., firewall; authentication, authorization, and accounting) or Long-Term Evolution control functions (e.g., mobility management entity, serving gateway, and packet data network gateway), some transport control functions can also be virtualized and moved to the cloud as a VNF. In this work we propose virtualizing the tenant SDN control functions of a VTN and moving them into the cloud. The control of a VTN is a key requirement associated with network virtualization, since it allows the dynamic programming (i.e., direct control and configuration) of the virtual resources allocated to the VTN. We experimentally assess and evaluate the first SDN/NFV orchestration architecture in a multipartner testbed to dynamically deploy independent SDN controller instances for each instantiated VTN and to provide the required connectivity within minutes
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