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Über dieses Buch

This book constitutes the proceedings of the 8th International ICST Conference, TridentCom 2012, held in Thessanoliki, Greece, in June 2012. Out of numerous submissions the Program Committee finally selected 51 full papers. These papers cover topics such as future Internet testbeds, wireless testbeds, federated and large scale testbeds, network and resource virtualization, overlay network testbeds, management provisioning and tools for networking research, and experimentally driven research and user experience evaluation.

Inhaltsverzeichnis

Frontmatter

Infinity Workshop

A Satellite Network Emulation Platform for Implementation and Testing of TCP/IP Applications

In order to assess the performance of TCP/IP based applications and protocols for communication over heterogeneous networks, simulation and emulation activities are of great importance. In particular, real time emulation provides the opportunity to reproduce realistic environment thanks to the implementation in laboratory of real architectures and protocols, avoiding utilizing real networks and in a controlled environment. We developed a broadband satellite real-time emulation platform called SNEP, designed to match the DVB-RCS European standards. The SNEP reproduces with great details the architecture and behavior of a real satellite broadband network, where it is possible to attach end-user PCs and use real protocols and applications. In this way, real network applications can be benchmarked in laboratory as in the real scenario of broadband satellite communications, at the same time proposing alternative solutions and optimizations. Furthermore with the SNEP the integration of satellite platforms with further terrestrial networks is also possible, both real and simulated/emulated, in order to extend the scope for testing.

Michele Luglio, Cesare Roseti, Francesco Zampgnaro

GAIA Extended Research Infrastructure: Sensing, Connecting, and Processing the Real World

The GAIA Extended Research Infrastructure is located at the southeast of Spain. It targets the research of Future Internet architectures and comprises several facilities from the University of Murcia and the Spanish government. It offers a vertical infrastructure, composed of a backend with high capacity of data storage, communication, and processing, together with a frontend with an extended set of multidisciplinary testbeds, deployments, and living labs for the ubiquitous monitoring, sensing, and processing. That said, it offers a highly flexible framework for experimentation with architectures and protocols for the Future Internet. In fact, it has been used in many research projects to evaluate their outputs from the communications and telematics point of view.

Pedro Martinez-Julia, Antonio J. Jara, Antonio F. Skarmeta

MTT CropInfra

CropInfra is a development and testing platform for future agricultural production, information and knowledge management infrastructure.

Ari Ronkainen, Frederick Teye, Markku Koistinen, Jere Kaivosoja, Liisa Pesonen, Pasi Suomi

The IBBT w-iLab.t: A Large-Scale Generic Experimentation Facility for Heterogeneous Wireless Networks

The w-iLab.t is a large-scale generic wireless experimentation facility. Over 260 wireless nodes are installed at two different locations. Every single wireless node is equipped with multiple wireless technologies, namely IEEE 802.15.4, Wi-Fi a/b/g(/n), and on some devices also Bluetooth. Additionally, w-iLab.t provides access to software defined radio platforms and also uses them to characterize the wireless environment during an experiment. The w-iLab.t flexibility and its tools enable experimenters to design and schedule a wide range of wireless experiments, and to collect and process results in a user-friendly way.

Stefan Bouckaert, Bart Jooris, Pieter Becue, Ingrid Moerman, Piet Demeester

UMA Testing Facility

UMA (University of Malaga) is developing a testing facility to provide support for the complete development process of Internet services in mobile networks. The platform enables the execution of data services on instrumented mobiles and will offer a remote access to carry out unattended measurement campaigns in commercial and emulated cellular networks. The facility mainly targets data connectivity and performance over cellular networks (GSM, GPRS, UMTS, HSPA and LTE), mobility procedure analysis, IP traffic monitoring, energy consumption and location.

Almudena Díaz Zayas, Francisco Javier Rivas, Pedro Merino Gomez

Infrastructure Overview with Focus on Experimental Facility

CESNET’s main role is to run, maintain and provide services for users of Czech NREN called CESNET2. It has more than 5 thousand kilometres of leased fibres of which 360 kilometres are represented by the Experimental Facility. Connection to other NRENs (mostly represented by GÉANT members) has capacity of 10Gbit, with exception of cz.NIC, where CESNET has 2x 10Gbit. Beyond this, CESNET also operates single fibre bidirectional transmission lines and offer several advanced services, mostly coming from its R&D activities. One example could be photonic service, based on pure fibre optic network advantages. Services such as wireless, security, storage, grid and others are mostly represented by particular CESNET departments.

Rudolf Vohnout, Lada Altmannova, Stanislav Sima, Pavel Skoda

Wireless

LTE Emulation over Wired Ethernet

Long-Term Evolution (LTE) standard merges an all IP voice and data communications with dynamic spectrum resource scheduling. The resource scheduler must balance the QoS requirements, traffic demands, and physical channel conditions to create desirable wireless end-user performance. The purpose of our research and the focus of this paper is a development of a unified testbed platform based on Emulab that can be used to examine the key aspects of an LTE system in realtime, including real time uplink and downlink scheduling, QoS parameters, and Android end-user applications. Our validation studies demonstrate that the testbed is capable of achieving delay, loss, and jitter that can be associated with an LTE communication system, and can be easily used to study a variety of LTE scheduling algorithms.

Roman Chertov, Joseph Kim, Jiayu Chen

Environment-Independent Virtual Wireless Testbed

Current digital packet-switching communications involves more cross-layer trade-offs than legacy wireless communications. Conventionally, each network layer is studied separately, and then the total system is evaluated in field tests. However, the results are always specific to the particular environmental conditions during the test and are not reproducible. Here we propose an architecture for an environment-independent virtual wireless testbed. We describe the implementation and validation results for a programmable wireless propagation emulator—the key component of the testbed. It was found that the system could emulate wireless propagation over at least 10 wireless nodes in real time using 10 field-programmable gate arrays with programmable parameters consisting of the channel model, path loss model, antenna model, and emulation scenario. Thus, the system is promising as a replacement for conventional field tests.

Hiroshi Mano

FPGA-Based Wireless Link Emulator for Wireless Sensor Network

Wireless sensor testbeds lack the flexibility for topology control and the accuracy for interference generation. Once the testbed is set up, the topology becomes fixed. Due to the nature of the wireless environment, experimenters often suffer from unpredictable background interference, while at the same time, find it hard to get accurate and repeatable interference sources.

The wireless link emulator addresses these issues by replacing the uncontrollable wireless link by a well-controlled and programmable hardwired medium. A radio interface is then made to behave according to the link configuration, thus offering flexibility for both topology and interference control. This paper describes the implementation of the wireless link emulator based on a number of low-cost Xilinx FPGAs. The system is verified experimentally and compared to existing emulation systems.

Wei Liu, Luc Bienstman, Bart Jooris, Opher Yaron, Ingrid Moerman

Implementation and End-to-end Throughput Evaluation of an IEEE 802.11 Compliant Version of the Enhanced-Backpressure Algorithm

Extensive work has been done in wireless multihop routing with several ideas based on shortest path or load balancing routing algorithms, that aim at minimizing end-to-end delay or maximizing throughput respectively. Backpressure is a throughput-optimal scheme for multihop routing and scheduling, while Enhanced-Backpressure is an incremental work that reduces end-to-end delay without sacrificing throughput optimality. However, the implementation of both theoretical schemes is not straightforward in the presence of 802.11 MAC, mainly because of their requirement for centralized scheduling decisions that is not aligned with the aspects of CSMA/CA.

This paper proposes a novel scheme, named Enhanced-Backpressure over WiFi (EBoW), which is compatible with the decentralized operation of WiFi networks and efficiently utilizes the benefits of Enhanced- Backpressure design, combining throughput optimality with low end-to-end delay. EBoW router is implemented relying on Click framework for routing configuration. The performance of EBoW is evaluated both on a medium-scale outdoors wireless testbed as well as through experimentations in NS-3 simulator tool. The protocol has been compared against other state of the art routing protocols and we argue that EBoW is much more throughput efficient than the others, while succeeding similar end-to-end delay.

Kostas Choumas, Thanasis Korakis, Iordanis Koutsopoulos, Leandros Tassiulas

Clouds and Networks

BonFIRE: A Multi-cloud Test Facility for Internet of Services Experimentation

BonFIRE offers a Future Internet, multi-site, cloud testbed, targeted at the Internet of Services community, that supports large scale testing of applications, services and systems over multiple, geographically distributed, heterogeneous cloud testbeds. The aim of BonFIRE is to provide an infrastructure that gives experimenters the ability to control and monitor the execution of their experiments to a degree that is not found in traditional cloud facilities.

The BonFIRE architecture has been designed to support key functionalities such as: resource management; monitoring of virtual and physical infrastructure metrics; elasticity; single document experiment descriptions; and scheduling.

As for January 2012 BonFIRE release 2 is operational, supporting seven pilot experiments. Future releases will enhance the offering, including the interconnecting with networking facilities to provide access to routers, switches and bandwidth-on-demand systems. BonFIRE will be open for general use late 2012.

Alastair C. Hume, Yahya Al-Hazmi, Bartosz Belter, Konrad Campowsky, Luis M. Carril, Gino Carrozzo, Vegard Engen, David García-Pérez, Jordi Jofre Ponsatí, Roland Kűbert, Yongzheng Liang, Cyril Rohr, Gregory Van Seghbroeck

ExoGENI: A Multi-domain Infrastructure-as-a-Service Testbed

NSF’s GENI program seeks to enable experiments that run within virtual network topologies built-to-order from testbed infrastructure offered by multiple providers (domains). GENI is often viewed as a network testbed integration effort, but behind it is an ambitious vision for multi-domain infrastructure-as-a-service (IaaS). This paper presents ExoGENI, a new GENI testbed that links GENI to two advances in virtual infrastructure services outside of GENI: open cloud computing (OpenStack) and dynamic circuit fabrics. ExoGENI orchestrates a federation of independent cloud sites and circuit providers through their native IaaS interfaces, and links them to other GENI tools and resources.

The ExoGENI deployment consists of cloud site “racks” on host campuses within the US, linked with national research networks and other circuit networks through programmable exchange points. The ExoGENI sites and control software are enabled for software-defined networking using OpenFlow. ExoGENI offers a powerful unified hosting platform for deeply networked, multi-domain, multi-site cloud applications. We intend that ExoGENI will seed a larger, evolving platform linking other third-party cloud sites, transport networks, and other infrastructure services, and that it will enable real-world deployment of innovative distributed services and new visions of a Future Internet.

Ilia Baldine, Yufeng Xin, Anirban Mandal, Paul Ruth, Chris Heerman, Jeff Chase

Experimental Demonstration of Network Virtualization and Resource Flexibility in the COMCON Project

In the recent past,

Network Virtualization

(NV) received much attention. Nevertheless,

Virtual Networks

(VNs) are still not available on the market. The consortium of the

COntrol and Management of COexisting Networks

(COMCON) project examines the potential interactions in vertically and horizontally divided markets and evaluates the applicability of existing technologies, like

Generalized Multi-Protocol Label Switching

(GMPLS), for automated virtualization-enabled network management. To promote the manifold research, a selected scenario was demonstrated at the EuroView 2011 comprising a

Video on Demand

(VoD) service using a

Scalable Video Codec

(SVC). All necessary components have been implemented and the selected scenario was performed on a real network based on Linux PCs. In this paper, we describe the components, the scenario, and the gained insights in detail.

Michael Duelli, Sebastian Meier, David Wagner, Thomas Zinner, Matthias Schmid, Marco Hoffmann, Wolfgang Kiess

Measurements

A Passive Measurement System for Network Testbeds

The ability to capture and process packet-level data is of intrinsic importance in network testbeds that offer broad experimental capabilities to researchers. In this paper we describe the design and implementation of a passive measurement system for network testbeds called GIMS. The system enables users to specify and centrally manage packet capture on a set of dedicated measurement nodes deployed on links in a distributed testbed. The first component of GIMS is a scalable experiment management system that coordinates multi-tenant access to measurement nodes through a web-based user interface. The second component of GIMS is a node management system that enables

(i)

local processing on packets (

e.g.,

flow aggregation and sampling),

(ii)

meta-data to be added to captured packets (

e.g.,

timestamps),

(iii)

packet anonymization per local security policy, and

(iv)

flexible data storage including transfer to remote archives. We demonstrate the capabilities of GIMS through a set of micro-benchmarks that specifically highlight the performance of the node management system deployed on a commodity workstation. Our implementations are openly available to the community and our development efforts are on-going.

Charles Thomas, Joel Sommers, Paul Barford, Dongchan Kim, Ananya Das, Roberto Segebre, Mark Crovella

Monitoring Pairwise Interactions to Discover Stable Wormholes in Highly Unstable Networks

Users of large-scale testbeds often need a group of nodes with a reasonable level of stability to execute applications and experiments. Although monitoring the stability of nodes themselves is certainly part of the solution, it is important to classify and select groups of nodes according to their ability to communicate among themselves. In this work we call such groups of nodes “stable wormholes”, and describe strategies to find those wormholes based on monitoring end-to-end pairwise interactions. Data acquired is used to find five different types of wormholes, each with a different stability pattern. The system was implemented in PlanetLab. Extensive experimental results are reported evaluating the proposed strategies. A comparison with another tool that selects nodes based on node stability alone is also presented. The execution of a MapReduce application shows that nodes selected with the proposed strategy ran the application significantly faster.

Luis C. E. Bona, Elias P. Duarte, Thiago Garrett

DNEmu: Design and Implementation of Distributed Network Emulation for Smooth Experimentation Control

Conducting a realistic network experiment involving globally distributed physical nodes under heterogeneous environment introduces a requirement of experimentation control between the real world network and emulated/simulated networks. However, there is a gap between them to deploy network experiments. In this paper, we propose the

Distributed Network Emulator

(

DNEmu

) to fill the gap for the requirements of a planetary-scale network experiment.

DNEmu

addresses the issue of real-time execution with message synchronization through distributed processes, and enables us to evaluate protocols with actual background traffic using a fully controlled distributed environment. Through evaluation with micro-benchmarks, we find that our

DNEmu

prototype implementation is similar in terms of packet delivery delay and throughput to the existing non-virtualized environment. We also present a use-case of our proposed architecture for a large distributed virtual machine service in a simple control scenario involving actual background traffic on the global Internet.

DNEmu

will contribute to research in protocol evaluation and operation in a huge network experiment without interfering with the existing infrastructure.

Hajime Tazaki, Hitoshi Asaeda

Implementation and Performance Evaluation of a New Experimental Platform for Medium Access Control Protocols

OpenMAC is presented in this paper as an innovative experimental platform suitable for field testing and performance evaluation of Medium Access Control (MAC) protocols developed in C++. The concept design of OpenMAC avoids the use of hardware-specific code or Hardware Description Language (HDL), softening the learning curve and accelerating the implementation process. This paper describes the OpenMAC hardware/software architecture and shows its benefits with a design example of a Carrier Sense Multiple Access (CSMA) protocol. Finally, the paper provides the implementation details and presents performance results of a practical test to demonstrate how OpenMAC can fulfill strict MAC timing specifications and thus perform as a device backwards compatible with standards.

Francisco Vázquez Gallego, Jesús Alonso-Zarate, Danica Gajic, Christian Liss, Christos Verikoukis

Sensor Networks

MagicLink: Weaving Multi-site Wireless Sensor Networks for Large-Scale Experiments

Despite the promising vision of pervasive sensor networks of thousands of nodes, conducting such large-scale experiments on demand is still far from reality due to the limitations of resources, space, and maintenance. To address such challenges, we propose the MagicLink middleware to “magically” weave geographically distributed sensor networks into a large-scale sensor network testbed. MagicLink is a key part of the OKGems remotely programmable cyber-physical system project under the GENI (Global Environment for Network Innovation) initiative; and MagicLink is designed to enable shared “clouds” of sensors for sensor network research and experiments at scale and on demand. Specifically, MagicLink has the following salient features: (1) seamless integration of multi-site sensor networks offering elastic and scalable testbeds; (2) online adaptive simulation that adopts a realistic radio model making the cross-site Internet connection behave like a one-hop sensor network link in real environment; (3) component-based design allowing easy integration with user applications. To the best of our knowledge, MagicLink is the first solution to enable “almost-real” large-scale sensor network experiments across sites. In this paper, we present MagicLink’s system architecture and subsystem design. We demonstrate the usability and fidelity of MagicLink through experimental results with representative applications on a two-site testbed.

Xinxin Liu, Li Yu, Di Wang, Xiaolin Li

Data Filtering and Aggregation in a Localisation WSN Testbed

The main challenge in wireless networks is to optimally use the confined radio resources to support data transfer. This holds for large-scale deployments as well as for small-scale test environments such as test-beds. We investigate two approaches to reduce the radio traffic in a test-bed, namely, filtering of unnecessary data and aggregation of redundant data. Both strategies exploit the fact that, depending on the tested application’s objective, not all data may be of interest. The proposed design solutions indicate that traffic reduction as high as 97% can be achieved in the specific case of test-bed for indoor localisation.

Ivo F. R. Noppen, Desislava C. Dimitrova, Torsten Braun

A Framework for Resource Selection in Internet of Things Testbeds

As the scale and heterogeneity of experimental environments increases, the selection of adequate testbed resources becomes a daunting task for the experimenter. Wrong choices or unexpected resource behavior can significantly decrease an experimenter’s productivity. These challenges are further amplified by the recent trend of moving testbeds from isolated labs to unpredictable real world environments to favor experimental evaluation under realistic conditions. This paper presents a framework for resource selection in large scale and heterogeneous Internet of Things testbeds, in order to support the experimenter with an increased understanding of available testbed resources, their expected behavior and topological relationships in the experimentation environment. Through an evaluation case study we demonstrate the effectiveness of our proposed framework.

Michele Nati, Alexander Gluhak, Hamidreza Abangar, Stefan Meissner, Rahim Tafazolli

Routing

Automated Deployment and Customization of Routing Overlays on Planetlab

PlanetLab testbed is widely used to evaluate protocols and applications under realistic Internet conditions, but this realism comes at the cost of uncontrolled topology and traffic behavior. The use of overlay networks on PlanetLab can solve this problem by giving more control to the experimenter. However, manually creating such overlays is far from simple, and existing solutions are either not available for all PlanetLab nodes, or lack support for low level overlays. Deployment and customization of overlay architectures are also poorly supported. In this paper we present a flexible solution to support overlay networks on PlanetLab, providing deployment automation, tunneling, routing, and traffic shaping capabilities. By building our solution into NEPI, a general framework for network experimentation, which automates design, deployment, and management of experiments, we simplify the complexity of building overlays on PlanetLab, and foster reusability and extensibility though NEPI’s modular structure.

Claudio Daniel Freire, Alina Quereilhac, Thierry Turletti, Walid Dabbous

A Real-Time Testbed for Routing Network

Existing network testbeds can enable developers to evaluate the performance of different routing protocols in a network and help students to enhance their hands-on experiences and understand complex and abstract concepts of routing protocols by allowing them to carry out real-world experiments, but they are either limited in features or expensive to establish and manage. To address the problem, this paper presents ARTNet - A Real-Time Testbed for Routing Network – which supports almost all the popular routing protocols for typical applications in a cost-effective manner. ARTNet has been implemented on a multiprocessor server for users to create and manage their routing networks. Performance and functionality evaluations on the ARTNet platform show that it is a promising approach.

Kang Yao, Weiqing Sun, Mansoor Alam, Mingzhe Xu, Vijay Devabhaktuni

VF2x: Fast, Efficient Virtual Network Mapping for Real Testbed Workloads

Distributed network testbeds like GENI aim to support a potentially large number of experiments simultaneously on a complex, widely distributed physical network by mapping each requested network onto a share or “slice” of physical hosts, switches and links. A significant challenge is

network mapping

: how to allocate virtual nodes, switches and links from the physical infrastructure so as to accurately emulate the requested network configurations.

In this paper we present the VF2x virtual network mapping system. Based on the VF2 subgraph isomorphism detection algorithm designed for matching large graphs, VF2x incorporates several novel algorithmic improvements. These and careful implementation make VF2x perform more than two orders of magnitude faster than the fastest previously published algorithm.

In evaluating our algorithm, we generated an extensive test workload based on analysis of a 5-year trace of experiments submitted to the popular Emulab testbed, and using the current ProtoGENI topology. We use this test workload to evaluate the performance of VF2x, showing that it can allocate resources to virtual networks on a large testbed in a matter of seconds using commodity hardware.

Qin Yin, Timothy Roscoe

Testbeds

How to Build a Better Testbed: Lessons from a Decade of Network Experiments on Emulab

The Emulab network testbed provides an environment in which researchers and educators can evaluate networked systems. Available to the public since 2000, Emulab is used by thousands of experimenters at hundreds of institutions around the world, and the research conducted on it has lead to hundreds of publications. The original Emulab facility at the University of Utah has been replicated at dozens of other sites.

The physical design of the Emulab facility, and many other testbeds like it, has been based on the facility operators’ expectations regarding user needs and behavior. If operators’ assumptions are incorrect, the resulting facility can exhibit inefficient use patterns and sub-optimal resource allocation. Our study, the first of its kind, gains insight into the needs and behaviors of networking researchers by analyzing more than 500,000 topologies from 13,000 experiments submitted to Emulab. Using this dataset, we re-visit the assumptions that went into the physical design of the Emulab facility and consider improvements to it. Through extensive simulations with real workloads, we evaluate alternative testbeds designs for their ability to improve testbed utilization and reduce hardware costs.

Fabien Hermenier, Robert Ricci

Federating Wired and Wireless Test Facilities through Emulab and OMF: The iLab.t Use Case

The IBBT iLab.t technology centre provides computing hardware, software tools and measurement equipment to support researchers and developers in building their ICT solutions, and in measuring the performance of these solutions. Among other things, the iLab.t hosts several generic Emulab-based wired test environments called the Virtual Walls, and two wireless test environments which are grouped under the name w-iLab.t. Until very recently, these wired and wireless test facilities each had their own history: they were deployed and maintained by a different group of people, were operated using different tools, and each had their own community of experimenters. This paper provides insight on the origin and evolution of the Virtual Wall and w-iLab.t facilities. It explains how these facilities were federated, by using the best parts of both the OMF and Emulab frameworks. It discusses the benefits of our local federation as well as our future federation plans.

Stefan Bouckaert, Pieter Becue, Brecht Vermeulen, Bart Jooris, Ingrid Moerman, Piet Demeester

Designing a Federated Testbed as a Distributed System

Traditionally, testbeds for networking and systems research have been stand-alone facilities: each is owned and operated by a single administrative entity, and is intended to be used independently of other testbeds. However, this

isolated facility

model is at odds with researchers’ ever-increasing needs for experiments at larger scale and with a broader diversity of network technologies. The research community will be much better served by a

federated

model. In this model, each federated testbed maintains its own autonomy and unique strengths, but all federates work together to make their resources available under a common framework.

Our challenge, then, is to design a federated testbed framework that balances competing needs: We must establish trust, but at the same time maintain the autonomy of each federated facility. While providing a unified interface to a broad set of resources, we need to expose the diversity that makes them valuable. Finally, our federation should work smoothly in a coordinated fashion, but avoid central points of failure and inter-facility dependencies. We argue that treating testbed design as a federated distributed systems problem is an effective approach to achieving this balance. The technique is illustrated through the example of

ProtoGENI

, a system we have designed, built, and operated according to the federated model.

Robert Ricci, Jonathon Duerig, Leigh Stoller, Gary Wong, Srikanth Chikkulapelly, Woojin Seok

Experimentation in Heterogeneous European Testbeds through the Onelab Facility: The Case of PlanetLab Federation with the Wireless NITOS Testbed

The constantly increasing diversity of the infrastructure that is used to deliver Internet services to the end user, has created a demand for experimental network facilities featuring heterogeneous resources. Therefore, federation of existing network testbeds has been identified as a key goal in the experimental testbeds community, leading to a recent activity burst in this research field. In this paper, we present a federation scheme that was built during the Onelab 2 EU project. This scheme federates the NITOS wireless testbed with the wired PlanetLab Europe testbed, allowing researchers to access and use heterogeneous experimental facilities under an integrated environment. The usefulness of the resulting federated facility is demonstrated through the testing of an implemented end-to-end delay aware association scheme proposed for Wireless Mesh Networks. We present extensive experiments under both wired congestion and wireless channel contention conditions that demonstrate the effectiveness of the proposed approach in a realistic environment. Both the architectural building blocks that enable the federation of the testbeds and the execution of the experiment on combined resources, as well as the important insights obtained from the experimental results are described and analyzed, pointing out the importance of integrated experimental facilities for the design and development of the Future Internet.

Stratos Keranidis, Dimitris Giatsios, Thanasis Korakis, Iordanis Koutsopoulos, Leandros Tassiulas, Thierry Rakotoarivelo, Thierry Parmentelat

Posters

Smart Information Network: A Testbed Architecture for Future Internet

This paper introduces a testbed architecture for future Internet, which is called smart information network (SIN). The testbed opens up capabilities of network nodes through programmable platform, builds a uniform schedule system and various decision applications. The testbed can be easily employed to design and verify future Internet concepts.

Xiangyang Xue, Yi Li, Xiaoyuan Lu, Xin Wang, Lingwei Chu

Photonic Services and Their Applications

The poster addresses Photonic Services as a general approach to end-to-end connection over optical networks and possible types of applications that can benefit from them. Features and known challenges are highlighted. Also expected fields of application are listed and precise time transfer together with atomic clock comparison is discussed in detail with specific results.

Josef Vojtech, Vladimir Smotlacha, Stanislav Sima, Pavel Skoda

An Instrumentation and Measurement Architecture Supporting Multiple Control Monitoring Frameworks

Virtual and/or experimental networks capable of supporting an entire new set of applications and services (Future Internet, Grids, Cloud Computing, other) use, typically, different Control and Monitoring Frameworks (CMFs). This poster addresses the multiple federated CMFs instrumentation and measurement problems. A monitoring architecture (FIBRE-BR I&M Architecture) is briefly introduced by illustrating its basic components and services and its capability to integrate different CMF’s I&M Services. FIBRE-BR will use three different control and monitoring frameworks in its nine islands: OFELIA Control Framework, cOntrol and Management Framework (OMF) and ProtoGENI. Our target is to provide monitoring services, possibly, with a maximum reuse of the available CMFs I&M services over a new integrated and federated network structure. Some of the various aspects involved include the virtualized equipment, networks and monitored data; the collected data control access; and, finally, the multiple CMFs I&M data integration. This poster presents the FIBRE-BR I&M Architecture that integrates diverse I&M services, tools and facilities from multiple CMFs, allowing FIBRE-BR users, possibly transparently to each specific CMF, to benefit from the corresponding infrastructure and experiment specific measurement data.

Marcelo M. Pinheiro, Igor L. E. Macêdo, Igor L. O. Souza, Thiago S. Hohlenweger, Paulo R. R. Leite, Adriano L. Spínola, Herbert Monteiro, Raphael A. Dourado, Leobino N. Sampaio, José A. Suruagy Monteiro, Joberto S. B. Martins

A Self-organized, Service-Oriented GMPLS Optical Network Testbed

In this paper, we detail the implementation of a self-organized GMPLS network using the DRAGON software suite to introduce service awareness in a GMPLS network. DRAGON daemon has been extended to support anycast routing to allow forwarding user (service) requests to the most suitable servers based on their advertised service attributes. Furthermore, OSPF daemon has been also extended to allow for these advertisements to propagate through the network and modify shortest paths based on these service attributes that can be network (i.e. bandwidth, delay etc) and non-network (storage capacity, CPU units, availability etc) resources.

Apostolis Siokis, Kyriakos Vlachos

A Framework for Multidimensional Measurements on an Experimental WiMAX Testbed

A major difficulty in the design, study, and implementation of wireless protocols and applications is the multitude of nondeterministic factors (e.g. interference, weather conditions, competing traffic) that can affect their performance. For this reason, testbeds that enable researchers to quantify these influences have become increasingly essential in the wireless research community. The growing sophistication of wireless testbeds and the wide array of services they can provide to researchers have advanced the field tremendously.

Toward this end, we present an early implementation of an instrumentation and measurement framework that we have deployed on an open-access 802.16e wireless research testbed at the Polytechnic Institute of NYU. We have created a set of tools to allow experimenters to routinely collect measurements of environmental conditions during experiment runtime. These tools integrate high volumes of multidimensional measurement data from a diverse array of sources, including measurements from software defined radio peripherals, sensors, and network device drivers. With this, we aim to give researchers the ability to conduct rigorous and repeatable over-the-air experiments. We also foresee potential applications for this framework beyond its use in experiments, such as in long-term testbed monitoring.

Fraida Fund, Chen Dong, Thanasis Korakis, Shivendra Panwar

FIBRE Project: Brazil and Europe Unite Forces and Testbeds for the Internet of the Future

In October 2011 a new, ambitious project was launched, named FIBRE (Future Internet testbeds experimentation between Brazil and Europe). Its main goal is to create common space between Brazil and EU for Future Internet experimental research into network infrastructure and distributed applications, by building and operating a federated EU-Brazil Future Internet experimental facility. Apart from bridging partners from two continents, the project brings together different technologies, including OpenFlow, wireless and optical communications. To demonstrate the public utility of the facility, FIBRE will design and implement a set of pilot applications ranging from seamless wireless connectivity to high-definition content delivery. The poster to be presented describes FIBRE’s goals, its testbed facilities and a schema of the envisioned architecture embracing the functionalities of the individual testbeds, as well as their federation. This schema has resulted from the collaborative work of the partners in order to define the functional requirements related to such an architecture. Our ambition with this poster is to attract new users for the facility from the experimental research community, but also to stimulate interest for FIBRE’s activities among the conference’s attendees.

Sebastia Sallent, Antonio Abelém, Iara Machado, Leonardo Bergesio, Serge Fdida, Jose Rezende, Siamak Azodolmolky, Marcos Salvador, Leandro Ciuffo, Leandros Tassiulas

Demos

Cross-Testbed Experimentation Using the Planetlab-NITOS Federation

Federation of network testbeds has been identified as a key goal in the experimental testbeds community, leading to a recent activity burst in this research field. In this demo, we describe a federated experiment between the NITOS wireless testbed and the Planetlab Europe (PLE) testbed. The federation scheme supporting this experiment was initially established during the Onelab2 EU project and was enhanced during the OpenLab EU project. The experiment constitutes in testing the implementation of an end-to-end delay aware Wi-Fi association scheme, in an environment where a wireless station situated at NITOS is sending traffic towards a remote PLE server.

Nikos Makris, Stratos Keranidis, Dimitris Giatsios, Thanasis Korakis, Iordanis Koutsopoulos, Leandros Tassiulas, Thierry Rakotoarivelo, Thierry Parmentelat

OpenFlow and P2P Integrated Testing, Project: OpenLab

Facilities and resources are offered by testbed providers for creating richer and broader experimentation scenarios for future internet research. Federation among resource providers has emerged as a concept of enabling such rich experimentation scenarios. This demo presents the work in the context of OpenLab project by enabling with OpenLab tools Openflow experimentation.

Christos Tranoris, Spyros Denazis

An Integrated Chassis Manager Card Platform Featuring Multiple Sensor Modules

The gradually growing demand for experimentation of protocols designed for wireless networks in real environments has resulted in the development of experimental network facilities (testbeds). Most currently deployed testbeds have been designed so as to offer services to experimenters that lie within the testbed’s premises, thus limiting the accessibility to external users. The requirement for multi-user access of network resources has led several large-scale testbeds to provide remote access services to certified experimenters. However, management and maintenance of large-scale remotely accessible testbeds is a rather challenging task that requires proper hardware, as well as software custom-built tools. In order to provide for remote switching of testbed nodes, NITOS has developed a new chassis manager (CM) card and also a custom framework that allows for monitoring and controlling of the nodes’ operational mode. In addition, NITOS CM card provides for gathering of various types of sensor measurements, through the attached temperature, humidity and light intensity sensor modules. Another innovative characteristic of the proposed card is that it provides the experimenters with the ability to monitor the energy consumption of each testbed node, which is rather important for experimentation with power optimization schemes. In this demo, we will present the various functionalities of the NITOS CM card and the developed control framework that accompanies it.

Giannis Kazdaridis, Stratos Keranidis, Harris Niavis, Thanasis Korakis, Iordanis Koutsopoulos, Leandros Tassiulas

An Experimental Framework for Channel Sensing through USRP/GNU Radios

In the last decade testbeds have been set-up to evaluate network protocols and algorithms under realistic settings. In order to draw solid conclusions about the corresponding experimental results, it is important for the experimenter to have a detailed view of the existing channel conditions. Moreover, especially in the context of non-RF-isolated wireless testbeds, where external interference severely impacts the resulting performance, the requirement of experimenters for accurate channel monitoring becomes a prerequisite. Toward, this direction, various channel sensing platforms have been introduced, where each one offers different operational characteristics. In this demo, we propose the NITOS Channel Sensing framework, which is based on software-defined radio (SDR) devices that feature highly flexible wireless transceivers and are able to provide highly accurate channel sensing measurements. Through this framework, online measurement gathering is automated and further simplified using specifically developed scripts, so that it becomes a transparent process for the experimenter. The proposed framework is also accompanied by a web user interface that allows the user to get a graphical representation of the gathered measurements.

Virgilios Passas, Stratos Keranidis, Thanasis Korakis, Iordanis Koutsopoulos, Leandros Tassiulas

Integrating FlowVisor Access Control in a Publicly Available OpenFlow Testbed with Slicing Support

OpenFlow technology has recently attracted a lot of attention in the networking research community, as the ability to control the forwarding plane of a switch through software opens new exciting capabilities for protocol designers. Several network testbeds have added OpenFlow-capable switches to their equipment, while at the same time new OpenFlow-centric testbeds have been created. This demo describes a proposed approach to provide testbed slicing in a publicly available testbed featuring OpenFlow switching equipment. The approach leverages the slicing features of the FlowVisor software component and combines them with the NITOS Scheduler resource reservation framework. The resulting configuration was implemented and successfully integrated into the software framework of the publicly available testbed NITOS.

Dimitris Giatsios, Kostas Choumas, Dimitris Syrivelis, Thanasis Korakis, Leandros Tassiulas

A Demonstration of Video over an IEEE 802.11 Compliant Version of the Enhanced-Backpressure Algorithm

This demo presents a novel routing and scheduling scheme, named Enhanced-Backpressure over WiFi (EBoW), that obviously outperforms the dominant approach of a shortest-path routing (SRCR) combined with the classic CSMA/CA scheduling policy of 802.11 networks. The new scheme combines aspects of load-balancing and shortest-path routing and enhances the CSMA/CA scheduling, maximizing the throughput performance, while keeping low end-to-end delay. We perform a comparative demonstration of video streaming over an ad-hoc 802.11 network, using EBoW and SRCR, where the latter one is a state-of-the-art shortest-path routing algorithm. The new scheme delivers a smooth and jitter-free video playback experience, while the SRCR scheme experiences noticeable jitter and rather frequent distortions. The demo clearly demonstrates the performance superiority of the new implemented scheme, as compared to the other one. The implementation of both schemes relies on the well-known Click framework.

Kostas Choumas, Thanasis Korakis, Iordanis Koutsopoulos, Leandros Tassiulas

The QUEENS Experiment through TEFIS Platform

QUEENS (Dynamic Quality User Experience ENabling Mobile Multimedia Services) aims at exploiting and leveraging on the benefits and flexibility provided by a novel dynamic real-time QoE provisioning framework in order to assess and establish a new era of user-centric mobile multimedia applications. To achieve that, QUEENS utilizes and builds on the TEFIS infrastructure (EC ICT FIRE initiative) that provides a unique integrated platform for supporting efficient Future Internet service experiment and development involving different actors and heterogeneous testbeds. The TEFIS tools and facilities for designing, planning and executing QUEENS experiment, along with a QoE-aware mobile multimedia application prototype will be demonstrated, forming the trends of future internet services and experimental procedures.

Georgios Aristomenopoulos, Argyris Kaninis, Panagiotis Vlahopoulos, Annika Sällström, Farid Benbadis, Symeon Papavassiliou

Integrating Sensor Measurements through CM Cards as an OMF Service

Several OMF-based testbeds are using Chassis Manager (CM) cards for autonomously controlling and monitoring the status of nodes. CM cards are typically microcontroller boards and can be connected to different kinds of modules, including sensor modules. The NITOS testbed, which has recently adopted the use of CM cards, features various types of sensors connected to them. Measurements can be easily obtained through dedicated web services running on the microcontroller, through a network interface. This demo describes the implementation of an OMF service on top of these CM card measurement web services. This service can either be requested directly by an experimenter who wishes to obtain a specific sensor measurement, or it can be utilized in OMF experiment scripts.

Vasilis Maglogiannis, Dimitris Giatsios, Giannis Kazdaridis, Thanasis Korakis, Iordanis Koutsopoulos, Leandros Tassiulas

Demonstrating an Information-Centric Network in an International Testbed

Information-Centric Networking (ICN) has increasingly been attracting attention by the research community. In ICN the center of attention becomes the information itself and not the endpoints as in today’s IP networks. In this demonstration we present applications that we developed as proof of concepts for our ICN approach. A video streaming as well as a voice and a HTTP over publish/subscribe application that run on top of our ICN prototype will be demonstrated running in an international testbed.

George Parisis, Ben Tagger, Dirk Trossen, Dimitris Syrivelis, Paris Flegkas, Leandros Tassiulas, Charilaos Stais, Christos Tsilopoulos, George Xylomenos

Demonstration of a Vehicle-to-Infrastructure (V2I) Communication Network Featuring Heterogeneous Sensors and Delay Tolerant Network Capabilities

The development of applications based over vehicular networks, such as road safety, environmental information etc. require a complete testbed platform for research and evaluation. Such a platform will be provided by NITOS[1] testbed, that will include nodes mounted on cars and fixed nodes of the testbed operating as road side units (RSU). Besides the wireless infrastructure, there will be several sensors regarding the environmental conditions and the vehicle. These will gather measurements about air conditions and GPS data such as position and speed and will be collected in a central database, where the experimenter will be able to depict them in a Google map.

Donatos Stavropoulos, Giannis Kazdaridis, Thanasis Korakis, Dimitrios Katsaros, Leandros Tassiulas

A Semantic Interface for OpenLab Network Measurement Infrastructures

This demo presents a semantic approach to integrate network measurement information. For this, we use a common ontology for network measurements, taking the results of the ETSI Monitoring Ontology for the Internet (MOI). This ontology allows working with a common information model, but it is also necessary to define mappings to each measurement database schema. Finally, the user can get the integrated information by distributing a semantic query among every data sources containing the monitored information.

Jorge E. López de Vergara, Víctor Acero, Mario Poyato, Javier Aracil

A Demonstration of a Relaying Selection Scheme for Maximizing a Diamond Network’s Throughput

We demonstrate a queue-aware algorithm studied in a diamond network topology. This algorithm’s decisions are obtained from an analytical optimization framework relying on our technical work [4] and we devise an implementation part by modifying the features of

ath9k

driver [3] and

click modular router

[5]. Performance evaluation is conducted through experimentation on the NITOS Wireless Testbed and it reveals a significant rise in total throughput considering a particular networking scenario while also it maintains stability of backlog queues when schedules indicated by Lyapunov-based technique as throughput optimal are selected.

NITOS Wireless Testbed website:

“http://nitlab.inf.uth.gr”

[2].

Apostolos Apostolaras, Kostas Choumas, Ilias Syrigos, Giannis Kazdaridis, Thanasis Korakis, Iordanis Koutsopoulos, Antonios Argyriou, Leandros Tassiulas

A Demonstration of Fast Failure Recovery in Software Defined Networking

Software defined networking (SDN) is a recent architectural framework for networking, which aims at decoupling the network control plane from the physical topology and at having the forwarding element controlled through a uniform vendor-agnostic interface. A well-known implementation of SDN is OpenFlow. The core idea of OpenFlow is to provide direct programming of a router or switch to monitor and modify the way in which the individual packets are handled by the device. We describe our implemented fast failure recovery mechanisms (Restoration and Protection) in OpenFlow, capable of recovering from a link failure using an alternative path. In the demonstration, a video clip is streamed from a server to a remote client, which is connected by a network with an emulated German Backbone Network topology. We show switching of the video stream from the faulty path to the fault-free alternative path (restored or protected path) upon failure.

Sachin Sharma, Dimitri Staessens, Didier Colle, Mario Pickavet, Piet Demeester

Controllable Packet Prioritization on PlanetLab Using NEPI

We present the extensions made to NEPI, the Network Experimentation Programming Interface, to allow easy creation and customization of routing overlays on top of PlanetLab. We particularly focus on demonstrating the traffic shaping capabilities provided by NEPI, with the use of customizable stream filters on PlanetLab overlays to induce controllable packet prioritization.

Alina Quereilhac, Claudio Daniel Freire, Thierry Turletti, Walid Dabbous

Testing of LTE Configurations and Applications

This paper introduces an experimental testbed developed at the University of Malaga to analyze the behavior of mobile applications and services over LTE (Long Term Evolution) networks. The novelty of the testbed is the ability to correlate the impact of radio propagation issues on LTE configurations and applications protocols and cross tuning LTE parameters and IP protocols from the point of view of the quality perceived by end users. In this work we focus on the evaluation of VoIP services over LTE networks.

Francisco Javier Rivas, Almudena Diaz Zayas, Pedro Merino Gomez

TaaSOR – Testbed-as-a-Service Ontology Repository

This demonstration is introducing Testbed-as-a-Service (TaaS) infrastructure that illustrates use of community based approach to building experimental ontologies and generation of supporting testbed resources applied to OMF based testbed. While this TaaS demo is initially primarily targeting virtualization and community collaboration, the final objective is to support domain specific experimental description languages and resource management in federated testbeds.

Milorad Tosic, Ivan Seskar, Filip Jelenkovic

Enabling Sensing and Mobility on Wireless Testbeds

The inherent inability of simulation models to adequately express factors such as wireless signal propagation etc., can lead to incomplete evaluation of wireless protocols and applications. Thus, testing of proposed schemes under real-life settings has become the de facto validation process. More specifically, in the context of testing scenarios that include mobility, evaluation in real environments becomes a prerequisite. Networking testbeds have recently extended their capabilities by providing the researchers with the ability to include mobile nodes in their experiments as well. Towards this direction, we have developed a prototype mobile node in NITOS, which features a mounted camera and wireless interfaces that enable remote access and control. The proposed mobility framework is also accompanied by a graphical user interface that allows the experimenter to observe the node’s behavior remotely.

Harris Niavis, Giannis Kazdaridis, Thanasis Korakis, Leandros Tassiulas

Remote Control of Robots for Setting Up Mobility Scenarios during Wireless Experiments in the IBBT w-iLab.t

The w-iLab.t is a large-scale generic wireless experimentation facility. Two locations are equipped with in total over 260 wireless nodes. In the w-iLab.t Zwijnaarde location mobile nodes are hosted. The mobile nodes are mounted on top of robots, of which the movement can be fully controlled by the experimenter. Due to a high accuracy positioning algorithm, the exact position of the robots is known at all time during the experiments. This enables us to provide repeatable and controlled mobile experiments to our users.

Pieter Becue, Bart Jooris, Vincent Sercu, Stefan Bouckaert, Ingrid Moerman, Piet Demeester

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