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478documents trouvés

17302
21/11/2017

Cross fertilization between wireless testbeds and NS-3 simulation models

G.KREMER, P.OWEZARSKI, P.BERTHOU

SARA

Manifestation avec acte : ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems ( MSWIM ) 2017 du 21 novembre au 25 novembre 2017, Miami (USA), Novembre 2017, 9p. , N° 17302

Lien : https://hal.laas.fr/hal-01575822v1

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Abstract

Network simulators are ooen used for their simplicity and cost regarding wireless networks. However, their realism is ooen criticized and their results challenged. e main concern comes from the modeling of the PHY and MAC layers. To assess the performances of these simulators and their models, the results of simulations are ooen compared with experimental results. However, the comparison methodolo-gies used in these studies may introduce biases. is work focuses on accurately discovering and analyzing the reasons for the calibration problems or implementation bugs in sim-ulators and experimental devices. For this purpose, we leverage the famous Root Cause Analysis (RCA) technique for comparing traces issued from diierent simulations and real experiments, that includes the study of the root causes of dis-similarities. roughout the paper, our RCA-based method has been applied to detect and analyze a performance anomaly between NS-3 simulation and our lab wireless testbed when transmiiing data over a WIFI 802.11 link. It especially details how low level traac traces have been generated in both environments for similar scenarios, and how they can accurately be compared and their diierences analyzed. ACM Reference format:

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17310
21/11/2017

A generic and configurable topology discovery service for software defined wireless multi-hop network

L.CHEN, S.ABDELLATIF, P.BERTHOU, B.NOUGNANKE, T.GAYRAUD

SARA

Manifestation avec acte : ACM International Symposium on Mobility Management and Wireless Access ( MOBIWAC ) 2017 du 21 novembre au 25 novembre 2017, Miami (USA), Novembre 2017, 4p. , N° 17310

Lien : https://hal.laas.fr/hal-01583905

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Abstract

We present a topology discovery service for software-defined wireless multi-hop networks, which is capable of capturing rich information about the network topology, such as link quality, interference and node characteristics etc., to effectively support the requirements of higher-layer SDN applications such as routing, channel allocation and transmission power control with enhanced flexibility. We analyse the general topology representation required by such SDN applications and specify the procedure and mechanism required at the controller and nodes to maintain this representation. A proof-of-concept implementation of our service on an SDN enabled multi-channel multi-interface wireless multi-hop network testbed shows the feasibility of our proposal.

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17269
25/09/2017

A dynamic resource defragmentation scheme for virtualized SDN-enabled substrate networks

A.SIMO TEGUEU, S.ABDELLATIF, T.VILLEMUR, P.BERTHOU

SARA

Manifestation avec acte : IEEE International Conference on Cloud Networking ( CLOUDNET ) 2017 du 25 septembre au 27 septembre 2017, Prague (République Tchèque), Septembre 2017, 6p. , N° 17269

Lien : https://hal.laas.fr/hal-01570578

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Abstract

Virtual network embedding (VNE) was subject to extensive research which lead to the emergence of a large number of efficient VNE algorithms. When virtual networks (VNs) arrive and depart over time, the substrate network can easily drift into an inefficient configuration, where resources are increasingly fragmented causing a VN request rejection although cumulatively, there are enough available resources. The ability to reallocate running VNs clearly leads to a better resource utilization. In this paper, we propose " Garbage Collector " (GC), a novel network control program for dynamic and online resource management in virtualized SDN-enabled substrates. GC efficiently addresses the fragmentation problem by performing selective migration. Simulations show that GC clearly improves acceptance ratio of VNE algorithms. They also reveal that, it outperforms some existing works from the literature by increasing the VN acceptance ratio by more than 10%.

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17316
22/09/2017

Companion Proceedings 11th European Conference on Software Architecture (ECSA 2017)

T.BURES, R.DE LEMOS, K.DRIRA, L.DUCHIEN, R.MIRANDOLA, C.TRUBIANI, J.PEREZ BENEDI

Czech Academy, University of Kent, SARA, LIFL, UPM, GSSI, UPV

Ouvrage (éditeur) : ECSA '17: Proceedings of the 11th European Conference on Software Architecture: Companion Proceedings, Septembre 2017, 2p. , N° 17316

Lien : https://hal.laas.fr/hal-01583947

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Abstract

The European Conference on Software Architecture (ECSA), held this year on 11 - 15 September 2017 at the University of Kent at Canterbury, United Kingdom, is a premier European software architecture conference, providing researchers, practitioners, and educators with a platform to present and discuss the most recent, innovative and significant findings and experiences in the field of software architecture research and practice. In addition to the main track, it features various events and tracks including the ECSA Track on Women in Software Architecture, Doctoral symposium, Tool demos, Poster session, and four workshops. All these are done with the aim to allow exploring new trends and supporting researchers at their early stage of career.

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17315
22/09/2017

Feature model as a design-pattern-based service contract for the service provider in the service oriented architecture

A.KAMOUN, M.HADJ KACEM, A.HADJ KACEM, K.DRIRA

ReDCAD Laboratory, SARA

Rapport LAAS N°17315, Septembre 2017, 26p.

Lien : https://hal.laas.fr/hal-01580264

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Abstract

In Service Oriented Architecture (SOA), many feature modeling approaches of Service Provider (SP) have been proposed, notably: the two widely used service contracts WSDL and WADL. By studying these approaches , we found that they suffer from several problems, notably: they only work for specific communication technologies (e.g., SOAP or REST) and they do not explicitly model SOA Design Pattern (DPs) and their compounds. One major benefit of using a DP or a compound DP is to develop SPs with proven design solutions. In this paper, in order to overcome these problems, we propose an approach that integrates Software Product Line (SPL) techniques in the development of SPs. Essentially, we propose a Feature Model (FM), which is the defacto standard for variability modeling in SPL, for the feature modeling of SP. This FM, named F M SP , is designed as a DP-based service contract for SP that models different features including 16 SOA DPs and their compounds that are related to the service messaging category. Its objective to enable developers to generate fully functional, valid, DP-based and highly customized SPs for different communication technologies. Through a practical case study and a developed tool, we validate our F M SP and demonstrate that it reduces the development costs (effort and time) of SPs.

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17297
18/09/2017

ntegrating short history for improving clustering based network traffic anomaly detection

J.DROMARD, P.OWEZARSKI

SARA

Manifestation avec acte : International Workshop on Autonomic Systems for Big Data Analytics ( ASBDA ) 2017 du 18 septembre au 22 septembre 2017, Tucson (USA), Septembre 2017, 8p. , N° 17297

Lien : https://hal.archives-ouvertes.fr/hal-01576752

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Abstract

Traffic anomaly detection is of premier importance for network administrators as anomalies have a dramatic impact on network performances, and QoS perceived by users. It is, however, a very time consuming and costly task that often requires decision from network and security experts. For making anomaly detection autonomous, many research works started investigating the use of unsupervised machine learning techniques, and in most cases traffic clustering. Identifying the clusters corresponding to anomalous traffic classes among the full set of detected clusters still remains a challenge. This is mostly due to the nature of clustering techniques that work on traffic samples of a given duration, each cluster being classified after an uncertain post processing stage. In this paper, we show how anomaly detectors can benefit from keeping a temporal track of the clustering results along time. This improvement has been added to ORUNADA (Online Real-time Unsupervised Network Anomaly detection Algorithm) that aimed at providing efficient anomaly detection on high speed networks. This new ORUNADA version-called H-ORUNADA for History-ORUNADA-is then evaluated on a new ground truth, called SynthONTS, that is currently designed to provide a modern and complete dataset with labeled anomaly. H-ORUNADA has also been implemented on Spark Streaming for being able to work on very high speed networks (targeting several hundreds of Gbits/s), and evaluated on the Google Cloud Platform.

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17307
17/09/2017

High performance issues related to the IoT and smart earth

D.EL BAZ

CDA

Conférence invitée : International Conference on Parallel Computing ( PARCO ) 2017 du 12 septembre au 15 septembre 2017, Bologne (Italie), Septembre 2017, 62p. , N° 17307

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17296
12/09/2017

How to cache in ICN-based IoT environments?

M.MEDDEB, A.DHRAIEF, A.BELGHITH, T.MONTEIL, K.DRIRA

SARA, HANA Research Group

Rapport LAAS N°17296, Septembre 2017, 8p.

Lien : https://hal.archives-ouvertes.fr/hal-01575386

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Abstract

Information-Centric Networking (ICN) is an emerging network paradigm based on name-identified data objects and in-network caching. Therefore, ICN contents are distributed in a scalable and cost-efficient manner. With the rapid growth of IoT traffic, ICN is intended to be a suitable architecture to support IoT networks. In fact, ICN provides unique persistent naming, in-network caching and multicast communications which reduce the data producer load and the response latency. Using ICN in an IoT environment requires a study of caching policies in terms of cache placement strategies and cache replacement policies. To this end, we address, in this paper, caching challenges with the aim to identify which caching policies are suitable for IoT networks. Simulation findings show that the combination of the consumer-cache caching strategy and the RR cache replacement policy is the most convenient in IoT environments in terms of hop reduction ratio, server hit reduction and response latency.

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17280
08/09/2017

A performance analysis of orchestra scheduling for TSCH networks

S.REKIK, N.BACCOUR, M.JMAIEL, K.DRIRA

ReDCAD Laboratory, SARA

Rapport LAAS N°17280, DOI: 10.1002/itl2.4, Septembre 2017, 10p.

Lien : https://hal.archives-ouvertes.fr/hal-01575098

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Abstract

The IEEE 802.15.4 TSCH (Time Slotted Channel Hopping) represents the latest generation of low-power and highly reliable MAC protocols. It orchestrates the medium access according to a time-frequency communication schedule. However, TSCH specification does not provide any practical solution for the establishment of the schedule. Orchestra is a recent scheduling solution for TSCH that brings significant advantages such as, the use of simple scheduling rules, the low signaling overhead, and the high delivery ratio it is able to fulfill. In this paper, we investigate the use of TSCH protocol with Orchestra scheduling approach for the Internet of Things (IoT) applications. Performance analysis results demonstrate that despite its unique features, Orchestra may incur high end-to-end communication delay, especially when the traffic is not uniformly distributed in the network. This limitation makes Orchestra not sufficiently convenient for several delay-sensitive IoT applications, such as smart grid applications.

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17274
06/09/2017

Named data networking a promising architecture for the Internet of things (IoT)

M.MEDDEB, A.DHRAIEF, A.BELGHITH, T.MONTEIL, K.DRIRA

SARA, HANA Research Group

Rapport LAAS N°17274, Septembre 2017, 19p.

Lien : https://hal.archives-ouvertes.fr/hal-01575110

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Abstract

The Internet of things (IoT) is commonly perceived as the mere extension of the current Internet to our physical world to interconnect an unprecedented number of sensors/actuators, referred to as things. In this Internet architectural context, some IoT services are currently offered by several Telecom operators of the Arab World such as tracking services, near field communication, and surveillance, e-health and security services. However, the current Internet TCP/IP protocol suite has reached its limits and is deemed inappropriate to deal with the stringent challenges imposed by the heterogeneity as well as the number of these constrained devices. On the other hand, the Named Data Networking (NDN) has recently received a lot of attention as a potential Information-Centric Networking (ICN) architecture for the future Internet. The NDN paradigm, relying on location-independent naming, in-network caching, name-based routing, multicast, anycast, mobility and self-secured content, has a great potential to efficiently address and solve the current seminal IP-based IoT architecture issues and requirements. In this paper, we first overview the current research and development progress in ICN, then we conduct a comparative study of the relevant ICN proposals and platforms, and finally, we discuss the suitability of the NDN as a promising lever architecture for IoT.

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