By Topic

Testbeds and Research Infrastructures for the Development of Networks and Communities, 2006. TRIDENTCOM 2006. 2nd International Conference on

Date - 2006

Filter Results

Displaying Results 1 - 25 of 81
  • A hybrid genetic algorithm for constrained hardware-software partitioning

    Publication Year: 2006 , Page(s): 1 - 6
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (907 KB) |  | HTML iconHTML  

    We propose a novel partitioning method for hardware-software codesign based on a genetic algorithm that has been enhanced for this specific task. Given a high-level program and an area constraint, our software considers different granularities levels to discover the most interesting blocks to be implemented in ad hoc functional units that can then be used as new instructions in a Move processor. Various optimizations are conducted to obtain a clean, very fast (in the order of a few seconds) and efficient partitioning on programs ranging from a few to several hundreds of lines of code. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • WiSNAP: a wireless image sensor network application platform

    Publication Year: 2006 , Page(s): 6 pp. - 12
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (476 KB) |  | HTML iconHTML  

    Wireless networks in combination with image sensors open up a multitude of previously unthinkable sensing applications. Capable tools and testbeds for these wireless image sensor networks can greatly accelerate development of complex, yet efficient algorithms that meet application requirements. In this paper, we introduce WiSNAP, a Matlab-based application development platform intended for wireless image sensor networks. It allows researchers and developers of such networks to investigate, design, and evaluate algorithms and applications using real target hardware. WiSNAP offers standardized and easy-to-use application program interfaces (APIs) to control image sensors and wireless motes, which do not require detailed knowledge of the target hardware. Nonetheless, its open system architecture enables support of virtually any kind of sensor or wireless mote. Application examples are presented to illustrate the usage of WiSNAP as a powerful development tool View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Test-bed for the Convergence Services of TV with IP-based STB and Mobile Services in the IPbased network

    Publication Year: 2006 , Page(s): 13 - 17
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (539 KB) |  | HTML iconHTML  

    We have developed several experimental convergence services and a test-bed of TV with IP-based STB(IP_STB) and mobile services. Service operators have been struggling to find killer services that can create or find new service market especially in convergence sector in the current and next broadband networks. But, as you know, it is very difficult to forecast what service will be a killer service. In the convergence sector of TV with IP_STB and mobile services, we found a clue. In this paper, we introduce the new convergence services developed of TV with IP-based Set-Top-Box and mobile services (SMS/MMS and LBS service using mobile network). And we describe the details of them. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Description of an IPv6 Linux-based UTRAN testbed

    Publication Year: 2006 , Page(s): 8 pp. - 25
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (640 KB)  

    Network modelling and traffic characterization are essential research activities towards the optimization of UMTS. We present here our IPv6 Linux-based UTRAN testbed which aims at emulating a real UTRAN segment. This emulation is relying on statistical traffic distributions, random walk UE mobility and line-of-sight power-based handover management. By interconnecting those different modules, we expose the first testbed results about the handover management and our views regarding the QoS management View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • EVEREST testbed: QoS management evaluation in B3G networks

    Publication Year: 2006 , Page(s): 6 pp. - 31
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (696 KB) |  | HTML iconHTML  

    This paper describes the motivation, methodology and implementation approach of the testbed that has been developed in the framework of the EVEREST project. Such testbed is used for demonstrating some of the main concepts addressed within the project, concerning both: common radio resource management strategies and end-to-end QoS architectures and mechanisms for B3G systems based on the UMTS architecture. The complexity of the interaction between B3G systems and the user applications, while dealing with the QoS concept, pushes to develop this kind of emulation platforms, where algorithms and applications can/must be tested in realistic conditions, not achievable by means of off-line simulations View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Precision and accuracy of network traffic generators for packet-by-packet traffic analysis

    Publication Year: 2006 , Page(s): 6 pp. - 37
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (208 KB) |  | HTML iconHTML  

    Network traffic generators allow video and audio streams to be modelled. `Bursty' traffic patterns imply packet-by-packet rather than time-averaged analysis to determine the impact on network routers. Due to computer operating system time event scheduling dependencies, the ability to generate accurate packet delivery is compromised. A real-time operating system on an x86 commodity machine is shown to result in greater accuracy and range, but with some loss in precision outside its operating range, compared to a general-purpose Linux kernel View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Router response to traffic at a bottleneck link

    Publication Year: 2006 , Page(s): 4 pp. - 41
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (101 KB) |  | HTML iconHTML  

    Traffic at varying bit rates, packet lengths and packet rates are passed across a bottleneck link. The router response is determined, especially the onset of instability due to excessive CPU load. The paper concludes that it is primarily packet rate that governs the router response. The results are relevant to multimedia streaming applications View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The IBM wireless sensor networking testbed

    Publication Year: 2006 , Page(s): 5 pp. - 46
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (412 KB) |  | HTML iconHTML  

    This paper describes the wireless sensor networking testbed built at the IBM Zurich Research Laboratory. The testbed has been used to address a wealth of exciting research challenges. Performance evaluations have been carried out with short-range wireless communication technologies, which are highly relevant for sensor networking such as IEEE 802.15.4/ZigBee networks, Bluetooth WPANs, and IEEE 802.11b WLANs. With the testbed, the merits of wireless mesh networking for range extension and reliability enhancement have been explored. New light-weight messaging protocols for communication between sensors and an application server have been tested which allow to bring messaging-oriented middleware down to very low-end sensors and actuators. In addition, the testbed has been used to develop sensor applications for remote metering and location-sensing View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Barcelona's open access network testbed

    Publication Year: 2006 , Page(s): 9 pp. - 55
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (563 KB) |  | HTML iconHTML  

    This paper describes the implementation and deployment of a novel architecture for a metropolitan open wireless access network, shared among different service providers. A layered model that differentiates four different actors (user, Wireless Island, Neutral Operator and Service Provider) is introduced, and the mechanism to allow Service Provider selection by the user is detailed. Other key technical issues like AAA, security, redundancy and scalability are also analyzed. This testbed has been used to provide Internet access to different user communities related to our University and as a experimentation platform for service deployment and testing in a real-life scenario View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design considerations of a modular testbed for mobile IP networks

    Publication Year: 2006 , Page(s): 6 pp. - 61
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (150 KB) |  | HTML iconHTML  

    In this paper we present a research testbed being developed at K.U.Leuven, Belgium, aiming at providing a flexible and convenient testing infrastructure for researchers working on mobility issues over IP networks. The testbed is built on general-purpose PCs, which makes it suitable for most laboratories. Its user-level modularity makes it easy for both developers and users to configure and extend even for unusual mobility scenarios and new mobility techniques. Movement is realized in a way that makes mobility experiment easy to be carried out and automated View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Network service provider selection and security bootstrapping using PANA

    Publication Year: 2006 , Page(s): 6 pp. - 67
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (247 KB) |  | HTML iconHTML  

    With the increasing number of mobile users, there has been a demand for a unified solution not only for authenticating, authorizing and providing content to mobile users but also for selecting an ISP (Internet service provider) or a content provider. Rather than using different solutions for different deployment scenarios, we propose the use of PANA (protocol for carrying authentication for network access) as a generic mechanism for authentication, authorization and network selection that works across different access networks View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A hybrid infrastructure for surveillance-based sensor network experiments

    Publication Year: 2006 , Page(s): 6 pp. - 73
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (464 KB) |  | HTML iconHTML  

    In this paper, we describe a distributed sensor network test-bed and a surveillance experiment, as a technical solution to our sensor network challenge problem, to demonstrate the integration of distributed tracking algorithms with strategies for location estimation, energy management and mobility management of sensor nodes. The infrastructure for the test-bed provides an integrated platform consisting of real sensor nodes augmented with a simulated environment. It consists of several static and mobile physical sensor nodes, fixed sensors, virtual sensor nodes (sensing, tracking and communicating processes) and a network simulator that can simulate a sensor network. Data from real world tracking is provided instantaneously to the simulated environment, where it is used, analyzed and refined through various surveillance algorithms. Results from these simulations are then fed back to the real world to enable the sensor network to reorganize for reinforced tracking. The results indicate that a large number of distributed and interacting sensor nodes, with different capabilities and operating in different environments, can be incorporated in high fidelity experiments to analyze the challenging aspects of the surveillance problem through realistic application scenarios View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • ADRENALINE testbed: architecture and implementation of GMPLS-based network resource manager and routing controller

    Publication Year: 2006 , Page(s): 10 pp. - 83
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (550 KB) |  | HTML iconHTML  

    It is widely recognized that future optical networks are moving toward a model wherein all-optical reconfigurable switching devices are interconnected to provide flexible and dynamic high-speed optical connections. Furthermore, the introduction of a common control plane represents a great challenge for achieving the required intelligence for efficiently managing such networks. This article describes in depth the architectural details of two control plane controllers implemented over the ADRENALINE testbed: the resource manager and the routing controller. Finally, some discussion pays particular attention to optical routing aspects under the ADRENALINE framework. Such aspects include multi-domain routing, physical layer constraints, wavelength continuity, and diversity routing for network survivability purposes View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A rendezvous in network experiment-case study of Kuroyuri

    Publication Year: 2006 , Page(s): 8 pp. - 91
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (243 KB) |  | HTML iconHTML  

    Rendezvous among experiment entities appear in network experiments both implicitly and explicitly. When the driving system for a network experiment testbed supports such rendezvous, users are free to focus on the content of the experiments, without having to consider details of the rendezvous (conditions, timing, etc.) and their execution. This paper shows typical entity activities in network experiments, especially rendezvous, and presents our approach in the Kuroyuri network experiment driving program View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Cross-layer multi-hop wireless routing for inter-vehicle communication

    Publication Year: 2006 , Page(s): 10 pp. - 101
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (502 KB)  

    Ad-hoc networking provides a cost-effective support structure for inter-vehicle communication. A decentralized peer-to-peer information dissemination architecture is well suited for automotive applications that need to exchange data having local relevance. Routing, however, is challenge in a vehicular scenario because of the associated dynamism in network topology and variations in driving conditions. In this work we present a cross-layer ad-hoc routing approach based on link connectivity assessment in the network topology. We suggest a framework for proactive enhancements to the optimized link state routing (OLSR) protocol and implement the proposed measures within the protocol format. We further deploy an IEEE 802.11b based vehicular network and demonstrate the effectiveness of link-quality assessment based enhancements in improving the performance of inter-vehicle ad-hoc routing. Through actual test-runs, we show that the enhanced protocol is more responsive to variations in network connectivity and can take preemptive actions in choosing stable and durable routes. The routing methodology suggested in this work leverages cross-layer interactions among the networking, data-link, and physical layers, for enhanced adaptability to varying network topology and link states. The main contributions of this work are as follows: introduction of link-quality assessment methodology for enhanced adaptability of ad-hoc routing in a dynamically changing topology, delineation of the framework of a proactive topology-adaptive ad-hoc routing protocol in a vehicular scenario, and demonstration of effectiveness of the proposed routing enhancements in an IEEE 802.11b based vehicular test-bed View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The utility of perceptive communication between distant wireless nodes

    Publication Year: 2006 , Page(s): 10 pp. - 111
    Cited by:  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (253 KB) |  | HTML iconHTML  

    CSMA-based MAC protocols require wireless nodes to share the transmission medium with other nodes that are within carrier-sensing (CS) range. Hence, operations that depend on and can potentially affect the state of the shared medium, such as admission control, require coordination and information sharing among these nodes. The CS range of wireless nodes is traditionally much larger than the reception range. Nodes that are outside reception range but within CS range can sense packet transmissions; however, they are unable to decode the packet contents. Direct messaging between these nodes is therefore not feasible for information sharing. In this paper, we describe two perceptive approaches for communication with nodes within CS range. Our approaches exploit the ability of a node to detect a change in the strength of the carrier signal when a transmission is in progress. Information is encoded in, and inferred from, perceptible transmission characteristics, such as the duration of a transmission or the silence between adjacent transmissions. This paper evaluates the feasibility and effectiveness of our perceptive communication mechanisms on a hardware testbed. We implement a prototype of our solution on the Mica2 mote platform and test it in different network scenarios. Our results demonstrate that the durations of transmissions and silences can be correctly detected within a small margin of error in most situations, thus verifying the utility of our approach View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • GEDOMIS: a broadband wireless MIMO-OFDM testbed, design and implementation

    Publication Year: 2006 , Page(s): 10 pp. - 121
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (441 KB)  

    We present an experimental broadband wireless 4times4 multiple-input multiple-output (MIMO) OFDM system operating at two well-known WLAN frequency bands: 2.4 GHz and 5.2 GHz. The demonstrator is described placing special emphasis, both at the RF and DSP levels, on the design of a reconfigurable hardware architecture. In the RF section, a new scheme for the design of custom, area-efficient multi-antenna multiband radios is presented. At the DSP level, we describe the synchronization and channel estimation algorithms that may be used in scenarios with multiple transmit antennas. These algorithms take advantage of the cyclic delay diversity (CDD) mechanisms that are currently being proposed for the new IEEE 802.11n standard View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • EPON testbed and field trial environment in Taiwan

    Publication Year: 2006 , Page(s): 7 pp. - 128
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1042 KB) |  | HTML iconHTML  

    Broadband applications and fiber loop access constructions are important government policies in Taiwan. A series of related programs such as e-Taiwan, M-Taiwan, were carried out or are on-going. One target of M-Taiwan program is to have 4.2 million FTTx households by year 2010. Ethernet passive optical network (EPON) is the latest fiber loop access technology which has the merits of low-cost, easy-of-use, and transparency to the widely deployed infrastructure. The Industrial Technology Research Institute (ITRI) is Taiwan's largest government sponsored research organization pursuing to set up new industries and to help existing industries upgrade. ITRI was assigned to conduct the EPON technology developments and acts as the leading role and media in support of the erection of EPON technology applications. A pizza-box and a chassis-based EPON system are developed and ready to transfer to local vendors. A triple play over EPON testbed was established at Taipei Nankang Software Park, which facilitated multi-vendors such as optical components, HDTV content providers, equipment vendors, and IP STB vendors to use ITRI's EPON system to try their products. ITRI also jointly works with Chunghwa Telecom, the largest telecom operator in Taiwan, to establish an EPON testbed and trial site for domestic EPON system and component vendors to execute the functional and performance testing as well as the field trial activities. Details of the EPON system technology and testing environment are described in the paper. Observations of these testing activities are addressed View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Visible light communication using OFDM

    Publication Year: 2006 , Page(s): 6 pp. - 134
    Cited by:  Papers (38)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (497 KB) |  | HTML iconHTML  

    In this paper wireless communication using white, high brightness LEDs (light emitting diodes) is considered. In particular, the use of OFDM (orthogonal frequency division multiplexing) for intensity modulation is investigated. The high peak-to-average ratio (PAR) in OFDM is usually considered a disadvantage in radio frequency transmission systems due to non-linearities of the power amplifier. It is demonstrated theoretically and by means of an experimental system that the high PAR in OFDM can be exploited constructively in visible light communication to intensity modulate LEDs. It is shown that the theoretical and the experimental results match very closely, and that it is possible to cover a distance of up to one meter using a single LED View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Creating a distributed mobile networking testbed environment-through the Living Labs approach

    Publication Year: 2006 , Page(s): 5 pp. - 139
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (472 KB) |  | HTML iconHTML  

    Today, new ways of constructing and delivering complex wireless and mobile services require more elaborate and distributed prototyping, testing, and validation facilities. Testbeds are becoming an important tool for integrating technology components into the complex environment of the wireless world and end-users in their daily life. However technology in itself is no longer valid-benefits and usefulness for people in their daily life must be proven before the technology or service can be said to be a success. Living Labs is a user-centred real-life approach to wireless and mobility service and technology design and development (as well as other service areas). The user-centred approach places special emphasis on the need to develop mobile services that are usable, i.e. effective, efficient and satisfying to use, and has full end user integration in the creation and validation processes, which is necessary for gauging market acceptance of the developed prototypes and solutions View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Cost effective broadband fixed wireless access: opportunity for developing country

    Publication Year: 2006 , Page(s): 6 pp. - 145
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (156 KB) |  | HTML iconHTML  

    This paper presents the three key factors which inherently enable sustainable cost effective broadband fixed wireless access network infrastructure. These are integrated new technology with existing infrastructure, effective regulatory framework and local community deployment. A new approach for lowering the cost of broadband wireless access network is reviewed and the relationship of key factors is discussed. Then, it follows by insight into the assessment of cost effective networks. Finally, the paper overviews supporting policy and business model to reduce associated costs of broadband fixed wireless access networks View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optical transport network of the ADRENALINE testbed: GMPLS metropolitan all-optical tuneable AWG-based R-OADM ring

    Publication Year: 2006 , Page(s): 10 pp. - 155
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (457 KB) |  | HTML iconHTML  

    Given the abundance and strategic importance of ring fiber-plants in metropolitan area networks, and the accelerating growth of Internet traffic, it is crucial to make use of recent advances in optical networking technologies such as WDM, ROADMs, OXCs and tunable transceivers in order to offer the most cost-efficient traffic transport. The objective of this paper is to present the metropolitan all-optical tuneable AWG-based R-OADM ring network implemented in the ADRENALINE testbed View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A testbed demonstrating optical IP switching (OIS) in disaggregated network architectures

    Publication Year: 2006 , Page(s): 6 pp. - 161
    Cited by:  Papers (2)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (178 KB) |  | HTML iconHTML  

    The lack of a unified control plane does not allow current optical networks to dynamically provision new optical paths. The IETF standardization body has proposed the generalized multi-protocol label switching standard as a solution to this problem. Their efforts however focus on the creation of end-to-end optical trails. This concept is convenient for major service providers, whose network may span a large area, but may not suit smaller network operators. We believe that the future trend of the telecommunication industry is made up of a global network formed by many inter-linked operators of small and medium size. A novel type of network based on a distributed and disaggregated architecture seems to be the best solution to dynamic optical path establishment. In this paper we present an optical testbed implementing the concept of optical IP switching. Central to the system is the optical router that creates new lightpaths depending on encountered traffic flows. The decision making process is completely distributed, and perfectly fits the disaggregated network view. The testbed currently links two universities in Dublin, and may in future be extended to join other existing research networks View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Infrastructure for testing WLAN roaming

    Publication Year: 2006 , Page(s): 7 pp. - 168
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (201 KB) |  | HTML iconHTML  

    WLAN (wireless local area networks) are proliferating wildly, at home, in business, and across the globe in public places. These types of networks are based on devices according to the IEEE 802.11 standard. A main drawback for the nomadic user is that roaming mechanisms for PWLAN have not been standardized. Some organizations have started a definition process in order to standardize a set of open interfaces to connect the different elements involved in the PWLAN roaming scenario. This contribution presents the work developed to provide testing infrastructure to validate WLAN roaming solutions. A combination of network interoperability testing and conformance testing is presented. The testing infrastructure has already been used and the main causes of interoperability problems have been identified View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Demo of ADNETCONF: ADRENALINE's tool for dynamic configuration of GMPLS-based all-optical transport networks

    Publication Year: 2006 , Page(s): 4 pp. - 172
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (455 KB) |  | HTML iconHTML  

    The ADRENALINE testbed is a GMPLS-based intelligent optical network (ION) developed at the CTTC laboratories. It supports the configuration of multiple network topologies involving aspects such as number of nodes, link connectivity or wavelengths. However, given the large size of the testbed (composed of several pieces of hardware each one with its own configuration), manual topology reconfiguration results on elevated time consuming and error-prone processes. In order to solve such drawbacks, the ADNETCONF tool has been developed to provide a more easy an intuitive mechanism for automatically reconfiguring the testbed as well as the configuration of the executed processes (e.g. routing). This paper is focused on describing the main characteristics and a demonstration of the implemented ADNETCONF tool for the ADRENALINE testbed View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.