Seamless Dynamic Runtime Reconfiguration in a Software-Defined Radio
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We discuss implementation aspects of a software-defined radio system that allows for dynamic waveform reconfiguration during runtime without interrupting data-flow processing. Traditional software-defined radio systems execute a waveform statically, exactly as it is programmed. Reconfiguration is provided by executing a different waveform, which requires the system to stop processing data while reconfiguration occurs, and also may incur an unacceptable delay for some applications. Recent research has demonstrated basic reconfiguration by programming multiple branches into a waveform and dynamically switching between branches. This technique requires redundant resources and in general cannot be expanded to encompass all possible waveforms of interest, but, if implemented carefully, could be made to seamlessly process data. We propose a system that allows for dynamic insertion and removal of entire waveforms, individual constituent blocks, and block algorithm implementations tailored to specific processors. Our system performs this reconfiguration while maintaining processing state, seamlessly without interrupting data-processing, and with only the resources necessary for the given waveform and processors. In order to leverage this new level of reconfigurability, we created a new system component: a supervisor. This system supervisor monitors the state of each processor and waveform execution, and moves computations among available processors as their loads, capabilities, and block algorithm implementations allow. An example using a simple supervisor is provided to demonstrate the effectiveness of our system.
KeywordsSoftware defined radio Reconfiguration Dynamic reconfiguration Dynamic runtime reconfiguration Seamless reconfiguration Software-based reconfiguration OpenCL GPGPU
- 3.Sun, Z., Bradford, G. J., & Laneman, J. N. (2010). Sequence Detection Algorithms for Dynamic Spectrum Access Networks, in Proc. IEEE Int. Dynamic Spectrum Access Networks (DySPAN) Symp., Singapore, April.Google Scholar
- 4.Dickens, M. L., Dunn, B. P., & Laneman, J. N. (2010). Thresholding for optimal data processing in a software defined Radio Kernel, in Proc. of the Karlsruhe Workshop on Software Radios (WSR), Karlsruhe, Germany, March.Google Scholar
- 5.GNU Radio Website. http://gnuradio.org/. accessed October 2011.
- 6.Software Communications Architecture Website. http://sca.jpeojtrs.mil/. accessed October 2011.
- 7.GNU Radio Companion Website. http://www.joshknows.com/grc, accessed October 2011.
- 8.The MathWorks, Simulink Website. http://www.mathworks.com/products/simulink. accessed October 2011.
- 9.National Instruments Corporation, LabVIEW Website. http://www.ni.com/labview. accessed October 2011.
- 10.The Khronos Group, OpenCL Website. http://www.khronos.org/opencl, accessed October 2011.
- 11.NVIDIA, CUDA Website. http://www.nvidia.com/object/cuda_home.html, accessed October 2011.
- 12.Advanced Micro Devices, ATI Stream Website. http://www.amd.com/stream. accessed October 2011.
- 14.Ettus Research Products Website. http://www.ettus.com/products. accessed October 2011.