Designing and deploying a building-wide cognitive radio network testbed
ABSTRACT Wireless communication technology is constantly advancing with the primary objective being to improve the quality of service for the end user. Cognitive radio is a technology capable of advancing wireless communications to the next generation of intelligent devices. Integrating cognition into wireless applications such as dynamic spectrum access, radio resource management, wireless distributed computing, and even traditional protocol stacks has already been shown to provide benefits related to the communications quality of service. The majority of cognitive radio related research has been limited to theoretical frameworks and simulations or in a few cases, demonstrating prototype DSA devices on a small scale. In order to continue advancing in this area, larger-scale experiments that are reproducible and able to be moved beyond theoretical simulations are required. Virginia Tech has built a testbed for software-defined and cognitive radio related research for the purpose of rapid next-generation communication system prototyping using a medium scale size network of flexible wireless nodes. In this article we present the details of the development, design decision rationale, and deployment of this testbed in hopes that it will be both used by the research community, and duplicated and improved in order to further the development of the many different facets of cognitive radio research.
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ABSTRACT: This paper presents an overview of the ORBIT (open access research testbed for next-generation wireless networks) radio grid testbed, that is currently being developed for scalable and reproducible evaluation of next-generation wireless network protocols. The ORBIT testbed consists of an indoor radio grid emulator for controlled experimentation and an outdoor field trial network for end-user evaluations in real-world settings. The radio grid system architecture is described in further detail, including an identification of key hardware and software components. Software design considerations are discussed for the open-access radio node, and for the system-level controller that handles management and control. The process of specifying and running experiments on the ORBIT testbed is explained using simple examples. Experimental scripts and sample results are also provided.Wireless Communications and Networking Conference, 2005 IEEE; 04/2005
Conference Proceeding: Integrated Scientific Workflow Management for the Emulab Network Testbed.[show abstract] [hide abstract]
ABSTRACT: Abstract The main forces that shaped current network testbeds were the needs for realism and scale. Now that sev- eral testbeds support large and complex experiments, management,of experimentation processes and results has become,more difficult and a barrier to high-quality systems research. The popularity of network testbeds means,that new tools for managing,experiment work- flows, addressing the ready-made base of testbed users, can have important and significant impacts. We are now evolving Emulab, our large and popular network testbed, to support experiments that are organized around,scientific workflows. This pa- per summarizes the opportunities in this area, the new approaches we are taking, our implementation in progress, and the challenges in adapting scientific workflow concepts for testbed-based research. With our system, we expect to demonstrate that network testbeds with integrated scientific workflow management,can be an important tool to aid research in networking and dis- tributed systems.Proceedings of the 2006 USENIX Annual Technical Conference, May 30 - June 3, 2006, Boston, MA, USA; 01/2006
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ABSTRACT: In this paper, we introduce the Wireless Open-Access Research Platform (WARP) developed at CMC lab, Rice University. WARP provides a scalable and configurable platform mainly designed to prototype wireless communication algorithms for educational and research oriented applications. Its programmability and flexibility makes it easy to implement various physical and network layer protocols and standards. Moreover, the online open-access WARP repository is used to document and share different wireless architectures and cross-layer designs developed at educational and research centers. This repository is a fast and easy solution for students and researchers with a wide range of backgrounds in hardware implementation and algorithm development to collaborate and initiate multi-disciplinary system designs.Microelectronics Systems Education, IEEE International Conference on. 01/2007;