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Testbed

About: Testbed is a research topic. Over the lifetime, 10858 publications have been published within this topic receiving 147147 citations. The topic is also known as: test bed.


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Proceedings ArticleDOI
22 Aug 2008
TL;DR: FreeMAC is described, a reconfigurable MAC protocol development framework that enables the design and implementation of a general class of multi-channel MAC protocols on a typical Linux system and proposes a mechanism to reduce the latency in the scheduling of periodic operations of a software MAC protocol that have strict timing requirements.
Abstract: Exponential growth in the number of wireless devices that operate in the limited unlicensed frequency spectrum necessitates the next generation of radio devices to be reconfigurable and sensitive to changes in network conditions and spectrum availability. Most modern wireless devices offer increased software programmability and control over radio communication parameters. Since a large portion of the MAC protocol is implemented in software, with the firmware providing a set of functional primitives, it is possible to design and implement alternate MAC protocols in real testbeds equipped with commodity 802.11 devices. This paper describes FreeMAC, a reconfigurable MAC protocol development framework that enables the design and implementation of a general class of multi-channel MAC protocols on a typical Linux system. FreeMAC provides support for frequent channel switching and fine control over the timing of packet transmissions. We also propose a mechanism to reduce the latency in the scheduling of periodic operations of a software MAC protocol that have strict timing requirements. Results from our six node testbed indicate that using our approach, the scheduling latency of slot transitions in a TDMA-style MAC can be improved by up to an order of magnitude, with minimal overhead. FreeMAC also exports a number of radio configuration parameters as API functions to enable cross layer interactions among wireless networking protocols. As a proof of concept, we implement a simple multi-channel TDMA MAC on our testbed to demonstrate the utility of FreeMAC as a development framework.

77 citations

Journal ArticleDOI
01 Jul 2011
TL;DR: An integrated framework called NetTopo is presented for providing both simulation and visualization functions to assist the investigation of algorithms in WSNs and provides a common virtual WSN for the purpose of interaction between sensor devices and simulated virtual nodes.
Abstract: Network simulators are necessary for testing algorithms of large scale wireless sensor networks (WSNs), but lack the accuracy of real-world deployments. Deploying real WSN testbed provides a more realistic test environment, and allows users to get more accurate test results. However, deploying real testbed is highly constrained by the available budget when the test needs a large scale WSN environment. By leveraging the advantages of both network simulator and real testbed, an approach that integrates simulation environment and testbed can effectively solve both scalability and accuracy issues. Hence, the simulation of virtual WSN, the visualization of real testbed, and the interaction between simulated WSN and testbed emerge as three key challenges. In this paper, we present an integrated framework called NetTopo for providing both simulation and visualization functions to assist the investigation of algorithms in WSNs. NetTopo provides a common virtual WSN for the purpose of interaction between sensor devices and simulated virtual nodes. Two case studies are described to prove the effectiveness of NetTopo.

77 citations

Journal ArticleDOI
TL;DR: In this paper, the authors proposed an Android/OSGi platform for vehicular telematics applications, which includes remote management, rich class-sharing, proprietary vehicular applications, security policies, easy management of Application Programming Interface (APIs), and an open environment.

77 citations

Proceedings ArticleDOI
26 Apr 2004
TL;DR: A set of probes is developed with the goal of measuring the performance and the performance variability of basic grid operations, as well as the failure rates of these operations, by running probes on a grid testbed that spans 5 clusters in 3 institutions.
Abstract: Summary form only given. Like all computing platforms, grids are in need of a suite of benchmarks by which they can be evaluated, compared and characterized. As a first step towards this goal, we have developed a set of probes that exercise basic grid operations with the goal of measuring the performance and the performance variability of basic grid operations, as well as the failure rates of these operations. We present measurement data obtained by running our probes on a grid testbed that spans 5 clusters in 3 institutions. These measurements quantify compute times, network transfer times, and Globus middleware overhead. Our results help provide insight into the stability, robustness, and performance of our testbed, and lead us to make some recommendations for future grid development.

76 citations

Proceedings ArticleDOI
30 Sep 2013
TL;DR: NEMOx organizes a network into practical-size clusters, each containing multiple distributed APs (dAPs) that opportunistically synchronize with each other for netMIMO downlink transmission for large-scale wireless networks.
Abstract: Network MIMO (netMIMO) has potential for significantly enhancing the capacity of wireless networks with tight coordination of access points (APs) to serve multiple users concurrently. Existing schemes realize netMIMO by integrating distributed APs into one ``giant'' MIMO but do not scale well owing to their global synchronization requirement and overhead in sharing data between APs. To remedy this limitation, we propose a novel system, NEMOx, that realizes netMIMO downlink transmission for large-scale wireless networks. NEMOx organizes a network into practical-size clusters, each containing multiple distributed APs (dAPs) that opportunistically synchronize with each other for netMIMO downlink transmission. Inter-cluster interference is managed with a decentralized channel-access algorithm, which is designed to balance between the dAPs' cooperation gain and spatial reuse---a unique tradeoff in netMIMO. Within each cluster, NEMOx optimizes the power budgeting among dAPs and the set of users to serve, ensuring fairness and effective cancellation of cross-talk interference. We have implemented and evaluated a prototype of NEMOx in a software radio testbed, demonstrating its throughput scalability and multiple folds of performance gain over current wireless LAN architecture and alternative netMIMO schemes.

76 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023917
20222,046
2021499
2020590
2019693
2018639