Research Article
Large-scale Hybrid Testbed for Cognitive Radio Networks by Real-and-Virtual Execution
@INPROCEEDINGS{10.1109/TRIDENTCOM.2007.4444722, author={Masahiro Kuroda and Kentaro Ishizu and Goh Miyamoto and Yoshia Saito}, title={Large-scale Hybrid Testbed for Cognitive Radio Networks by Real-and-Virtual Execution}, proceedings={3rd International ICST Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities (TridentCom)}, publisher={IEEE}, proceedings_a={TRIDENTCOM}, year={2008}, month={2}, keywords={Cognitive radio CR software defined radio SDR unlicensed band spectrum sensing simulation emulation hybrid testbed Java}, doi={10.1109/TRIDENTCOM.2007.4444722} }- Masahiro Kuroda
Kentaro Ishizu
Goh Miyamoto
Yoshia Saito
Year: 2008
Large-scale Hybrid Testbed for Cognitive Radio Networks by Real-and-Virtual Execution
TRIDENTCOM
IEEE
DOI: 10.1109/TRIDENTCOM.2007.4444722
Abstract
Cognitive-radio networks are intended to be future spectrumefficient systems that can adapt to their operating environments by extending software defined radio (SDR) technologies. A testbed system for cognitive radio needs to be able to deal with sensitive radio components to verify low-level protocols and functions on CR terminals, and to evaluate high-level network protocols and throughputs using various applications running on a large wireless network. We propose a testbed for cognitve-radio networks under which terminals communicate using both real CR devices and those virtually configured in the sensing environment. All the stacks from MAC/PHY to the application layer are programmable and conform to the common interface of the simulation/emulation environment for CR networks, called CWCEF. The physical layer is either configured as a real CR device or as a virtual module with a cognitive component either by sensing real spectra or time-driven radio-feature extracted data that are generated from radio data. A real-device approach is used to verify the radio configuration and a virtual configuration is used to evaluate the network as many CR terminals are expected to be utilized. The testbed is flexible enough to re-build CR functions and protocols under any spectrum-sensing environment. CWC-EF is also intended to be used not only by local users but also remote users via the Internet.