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Realization of energy efficient edge AI devices using asynchronous circuits

Research Project

Project/Area Number 21K11812
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 60040:Computer system-related
Research InstitutionThe University of Aizu

Principal Investigator

SAITO HIROSHI  会津大学, コンピュータ理工学部, 教授 (50361671)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords非同期式回路 / FPGA / 畳み込みニューラルネットワーク / プロセッサ
Outline of Research at the Start

近年、現場(エッジ)に近いデバイスにて深層学習による推論処理を行うエッジAIデバイスが注目を浴びている。本研究では、非同期式回路にて省エネルギーなエッジAIデバイスの実現を目指す。具体的には、エッジAIデバイスの中核となるプロセッサや推論アクセラレータを非同期式回路として実現する。また、現在のプロセッサや推論アクセラレータで採用されている同期式回路と比較することで、消費エネルギーに対する非同期式回路の効果をデバイス構成レベルや回路構成レベルで明らかにする。

Outline of Final Research Achievements

The purpose of this research was to realize an energy efficient edge AI device using asynchronous circuits. The edge AI device consists of a processor, an accelerator, and an interface circuit connecting them. First, we designed an open-source RISC-V processor and an asynchronous binarized neural network (BNN) circuit. Next, we designed an interface circuit to connect the synchronous RISC-V processor and the asynchronous BNN circuit. Finally, an edge AI device combining all of these circuits was implemented on an FPGA and evaluated. We were able to reduce the energy consumption by about 34% compared to the case where all the circuits were synchronous circuits.

Academic Significance and Societal Importance of the Research Achievements

本研究の学術的意義は、非同期式回路による省エネルギーなエッジAIデバイスの実現にある。クロック信号を用いて回路全体を制御する同期式回路は、高周波なクロック信号を広範囲に分配しようとすると、クロック信号の消費電力が非常に高くなる。この問題を解決するために、非同期式回路を利用した。一方、AI以外の処理はプロセッサで実行し、AI処理の部分を高速化のためにアクセラレータで実行するというのは、エッジデバイスでも一般的な構成である。そのため、同期式プロセッサ、非同期式アクセラレータ、及びそれらを接続するインターフェース回路を実現した上で消費エネルギーの優位性を確認した。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (5 results)

All 2024 2023 2022

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (3 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] A Design Support Tool Set for Interface Circuits Between Synchronous and Asynchronous Modules2023

    • Author(s)
      Semba Shogo、Saito Hiroshi
    • Journal Title

      IEEE Access

      Volume: 11 Pages: 13408-13420

    • DOI

      10.1109/access.2023.3243224

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] RTL Conversion Method From Pipelined Synchronous RTL Models Into Asynchronous Ones2022

    • Author(s)
      Semba Shogo、Saito Hiroshi
    • Journal Title

      IEEE Access

      Volume: 10 Pages: 28949-28964

    • DOI

      10.1109/access.2022.3158487

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] A Study on an Interface Circuit for Burst Transfers from Synchronous to Asynchronous Circuits Considering Cycle Times2024

    • Author(s)
      Shogo Semba and Hiroshi Saito
    • Organizer
      The 25th Workshop on Synthesis And System Integration of Mixed Information technologies
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Autonomous Driving Robot Using FPGA and BNN with Random Forest2023

    • Author(s)
      Yasuyuki Suzuki, Shogo Semba, Yoichi Tomioka, and Hiroshi Saito
    • Organizer
      The 16th IEEE International Symposium on Embedded Multicore/Many-core Systems-on-Chip (MCSoC-2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A Study on the Design of Interface Circuits Between Synchronous-Asynchronous Modules Using Click Elements2022

    • Author(s)
      Semba Shogo, Saito Hiroshi
    • Organizer
      SASIMI 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research

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Published: 2021-04-28   Modified: 2025-01-30  

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