ICONA: Inter Cluster ONOS Network Application

Several Network Operating Systems (NOS) have been proposed in the last few years for Software Defined Networks; however, a few of them are currently offering the resiliency, scalability and high availability required for production environments. Open Networking Operating System (ONOS) is an open source NOS, designed to be reliable and to scale up to thousands of managed devices. It supports multiple concurrent instances (a cluster of controllers) with distributed data stores. A tight requirement of ONOS is that all instances must be close enough to have negligible communication delays, which means they are typically installed within a single datacenter or a LAN network. However in certain wide area network scenarios, this constraint may limit the speed of responsiveness of the controller toward network events like failures or congested links, an important requirement from the point of view of a Service Provider. This paper presents ICONA, a tool developed on top of ONOS and designed in order to extend ONOS capability in network scenarios where there are stringent requirements in term of control plane responsiveness. In particular the paper describes the architecture behind ICONA and provides some initial evaluation obtained on a preliminary version of the tool.Comment: Paper submitted to a conferenc

Service level Indication: A proposal for QoS monitoring in SLA -based multidomain networks

The offering of QoS based communication services has to face several challenges. Among these, the provisioning of an open and formalised framework for the collection and interchange of monitoring and performance data is feit as one of the most important issues to be solved. Indeed, this is true in seenarios where multiple providers are teaming (intentionally or not) for the construction of a complex service to be sold to a final user, like in the case of the creation of a virtual private network spanning multiple network Operators and infrastructures. In this case, failures in providing certain required Ievels in the quality parameters should be dealt with an immediate attribution of responsibility across the different entities involved in the end-to-end provisioning of the service. But also in cases apparently much simpler, for example when an user requires a video strearning service across a single operator network infrastructure, there is a demand for mechanisms for the measurement of the received quality of service across all the elements involved in the service provisioning: the server system, the network infrastructure, the dient terminal and the user application. lt is clear that this is a complex problem, involving different technologies, disciplines and research areas. In this paper, starting from the ongoing work in the definition of standard interfaces for the Quality of Service negotiation (Service Level Agreements) and control (Service Level Specifications), as weil as from the work ongoing in the IPFIX and IPPM working groups from the IETF, we introduce a new document specifically for delivering monitoring information to user applications. We called such a document Service Level Indication. We here aim at sketching a possible starting point for a research discussion. © 2003 by Springer Science+Business Media Dordrecht

Integration of 3G connectivity in planetlab Europe :A step of an evolutionary path towards heterogeneous large scale network testbeds

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Analysis of dynamic wireless power transfer systems based on behavioral modeling of mutual inductance

This paper proposes a system-level approach suitable to analyze the performance of a dynamic Wireless Power Transfer System (WPTS) for electric vehicles, accounting for the uncertainty in the vehicle trajectory. The key-point of the approach is the use of an analytical behavioral model that relates mutual inductance between the coil pair to their relative positions along the actual vehicle trajectory. The behavioral model is derived from a limited training data set of simulations, by using a multi-objective genetic programming algorithm, and is validated against experimental data, taken from a real dynamic WPTS. This approach avoids the massive use of computationally expensive 3D finite element simulations, that would be required if this analysis were performed by means of look-up tables. This analytical model is here embedded into a system-level circuital model of the entire WPTS, thus allowing a fast and accurate analysis of the sensitivity of the performance as the actual vehicle trajectory deviates from the nominal one. The system-level analysis is eventually performed to assess the sensitivity of the power and efficiency of the WPTS to the vehicle misalignment from the nominal trajectory during the dynamic charging process