ETRI Journal

  • 제34권4호
  • /
  • Pages.553-563
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  • 2012
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  • 1225-6463(pISSN)
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  • 2233-7326(eISSN)
한국전자통신연구원 (Electronics and Telecommunications Research Institute)
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MHP: Master-Handoff Protocol for Fast and Energy-Efficient Data Transfer over SPI in Wireless Sensing Systems

  • Yoo, Seung-Mok (IT Convergence Technology Research Laboratory, ETRI) ;
  • Chou, Pai H. (Department of Electrical Engineering and Computer Science, UC Irvine, Department of Computer Science, Nat'l Tsing Hua University)
  • 투고 : 2011.04.21
  • 심사 : 2012.02.24
  • 발행 : 2012.08.30
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초록

Serial peripheral interface (SPI) has been identified as a bottleneck in many wireless sensing systems today. SPI is used almost universally as the physical connection between the microcontroller unit (MCU) and radios, storage devices, and many types of sensors. Virtually all wireless sensor nodes today perform up to twice as many bus transactions as necessary to transfer a given piece of data, as an MCU must serve as the bus master in all transactions. To eliminate this bottleneck, we propose the master-handoff protocol. After the MCU initiates reading from the source slave device and writing to the sink slave device, the MCU as a master becomes a slave, and either the source or the sink slave becomes the temporary master. Experiment results show that this master-handoff technique not only cuts the data transfer time in half, but, more importantly, also enables a superlinear energy reduction.

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  1. Tone-Independent Orthogonalizing Lattice Equalization for Insufficient Cyclic-Prefix OFDM Transmissions vol.9, pp.12, 2012, https://doi.org/10.1155/2013/281895
  2. RTCO: Reliable Tracking for Continuous Objects Using Redundant Boundary Information in Wireless Sensor Networks vol.eb99, pp.7, 2016, https://doi.org/10.1587/transcom.2015ebp3431