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2019 Fiscal Year Research-status Report

A Theoretical Model for Autonomous Mobile Robots based on CPS and Limitations of its Computation

Research Project

Project/Area Number 17K00019
Research InstitutionHosei University

Principal Investigator

和田 幸一  法政大学, 理工学部, 教授 (90167198)

Co-Investigator(Kenkyū-buntansha) DEFAGO Xavier  東京工業大学, 情報理工学院, 教授 (70333557)
Project Period (FY) 2017-04-01 – 2021-03-31
Keywords自律分散ロボット / 同期度 / 集合問題 / ライト / 自己安定
Outline of Annual Research Achievements

CPSを考慮に入れた自律分散ロボット群に理論モデル構築とその上でのロボット群の計算能力に関して以下の成果を得た.
(1)CPSを意識した新しい自律分散ロボット群のモデル化とその上でのロボットに対するオンライン経路探索アルゴリズムを開発した.(2)従来のLCMロボットモデルにおける集合問題の可解性を耐故障性の観点から明らかにした.(3)従来のLCMロボットモデルにおけるスケジューラに対する自己安定化を考慮した効率的な実現手法を与えた.また,ビザンチン故障を許したロボット群に対する自己安定アルゴリズム手法を開発した.(4)ライト付きロボット群に対する計算能力を明らかにした.特に,ロボットの持つメモリとロボット間の直接通信の能力に焦点をあて,ロボットの同期度との関係を解明した.また,モデルチェッキングを利用したライト付きロボットアルゴリズムの検証法を開発した.(5)リングネットワークにおける制限視野をもつライト付きロボット群の集合問題に対する色数最適なアルゴリズムを与えた.このアルゴリズムはロボットの動作が完全な非同期でも動作する.
いずれの結果もCPSを考慮した新しい自律分散ロボット群のモデル化とそのモデル化のもとでの計算能力に対する限界の解明に寄与するものである.

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

自律分散ロボット群の理論モデルの構築のためのCPSの分析に関しては,(a) ペタスケールを含む巨大規模,(b) 構成エレメントや環境の空間的,及び,時間的多様性,(c) CPS 内部または外部環境に内在するダイナミクス,(d) 構成要素の動作や入力の不確実さを取り上げ,これらを反映した分散計算としての枠組みの検討を行った.特に,自己安定性と自律適応性はこのモデル構築に関して,最重点項目であるので,動的に変化する環境の下での自律的な秩序形成・機能発現のための進化・適応能力を有するモデル化を行い,そのモデルのもとでのロボットに対する経路探索アルゴリズムを与えた.また,ロボット群に対する計算能力の限界に関しては,自己安定性や自律適応性の観点から様々な結果を導いた.
これらの結果はCPSを取り入れた新しい自律分散ロボット群のモデル化とその計算能力を明らかにするうえで有用であると考えられる.

Strategy for Future Research Activity

CPSを取り入れた自律分散ロボット群の理論モデル化に関しては,完全解を得るまでには至らなかったが,これまで解明されている創発現象や創発システムをCPS とみなした時,CPSにとって本質であるものはなにかを明らかにすることができた.また,CPSにおいては,動作する物理環境に依存してソフトウエアだけなく,ハードウエア,オペレータや利用者ともインタフェースをもつため,CPSのシステム境界をどのように定めるかによって,問題設定がかわるため, これらも意識したモデル化は可能となった.引き続き自律分散ロボット群に対する理論モデルの構築を意識しながら,CPSを利用した自律分散ロボット群のモデル化を解明する必要がある.

Causes of Carryover

コロナウイルスのため,年度内に使用できなくなったため.2020年度内にできるだけ早く国内出張に使用予定である.

  • Research Products

    (26 results)

All 2020 2019 Other

All Int'l Joint Research (3 results) Journal Article (10 results) (of which Int'l Joint Research: 9 results,  Peer Reviewed: 9 results) Presentation (13 results) (of which Int'l Joint Research: 11 results,  Invited: 5 results)

  • [Int'l Joint Research] University of Ottawa/Carleton University(カナダ)

    • Country Name
      CANADA
    • Counterpart Institution
      University of Ottawa/Carleton University
  • [Int'l Joint Research] Sorbonne University(フランス)

    • Country Name
      FRANCE
    • Counterpart Institution
      Sorbonne University
  • [Int'l Joint Research] Ben-Gurion University of the Negev(イスラエル)

    • Country Name
      ISRAEL
    • Counterpart Institution
      Ben-Gurion University of the Negev
  • [Journal Article] Self-stabilizing gathering of mobile robots under crash or Byzantine faults2020

    • Author(s)
      Xavier Defago, Maria Potop-Butucaru, Philippe Raipin Parvedy
    • Journal Title

      Distributed Computing

      Volume: 33 Pages: 393-421

    • DOI

      10.1007/s00446-019-00359-x

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] On Memory, Communication, and Synchronous Schedulers When Moving and Computing2020

    • Author(s)
      Paola Flocchini, Nicola Santoro, and Koichi Wada
    • Journal Title

      Proc. 23rd International Conference on Principles of Distributed Systems

      Volume: - Pages: 25:1~25:17

    • DOI

      10.4230/LIPIcs.OPODIS.2019.25

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Gathering on Rings for Myopic Asynchronous Robots with Lights2020

    • Author(s)
      Sayaka Kamei, Anissa Lamani, Fukuhito Ooshita, Sebastien Tixeuil and Koichi Wada
    • Journal Title

      Proc. 23rd International Conference on Principles of Distributed Systems

      Volume: - Pages: 27:1~27:17

    • DOI

      10.4230/LIPIcs.OPODIS.2019.27

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Priority Inheritance with Backtracking for Iterative Multi-agent Path Finding2019

    • Author(s)
      Okumura Keisuke、Machida Manao、Xavier Defago、Tamura Yasumasa
    • Journal Title

      IJCAI 2019

      Volume: - Pages: 535~542

    • DOI

      https://doi.org/10.24963/ijcai.2019/76

  • [Journal Article] Brief Announcement: Neighborhood Mutual Remainder and its Self-Stabilizing Implementation of Look-Compute-Move Robots2019

    • Author(s)
      Shlomi Dolev, Sayaka Kamei, Yoshiaki Katayama, Fukuhito Ooshita and Koichi Wada
    • Journal Title

      Proc. of 33rd International Symposium on Distributed Computing (DISC 2019)

      Volume: - Pages: 43:1~43:3

    • DOI

      10.4230/LIPIcs.DISC.2019.43

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Brief Announcement: Model Checking Rendezvous Algorithms for Robots with Lights in Euclidean Space2019

    • Author(s)
      Xavier Defago and Adam Heriban and Sebastien Tixeuil and Koichi Wada
    • Journal Title

      Proc. of 33rd International Symposium on Distributed Computing (DISC 2019)

      Volume: - Pages: 41:1~41:3

    • DOI

      10.4230/LIPIcs.DISC.2019.41

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Brief Announcement: Self-stabilizing LCM Schedulers for Autonomous Mobile Robots Using Neighborhood Mutual Remainder2019

    • Author(s)
      Dolev Shlomi、Kamei Sayaka、Katayama Yoshiaki、Ooshita Fukuhito、Wada Koichi
    • Journal Title

      Proc. 21st International Symposium on Stabilization, Safety, and Security of Distributed Systems

      Volume: - Pages: 127~132

    • DOI

      10.1007/978-3-030-34992-9_11

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Brief Announcement Forgive & Forget: Self-stabilizing Swarms in Spite of Byzantine Robots2019

    • Author(s)
      Ashkenazi Yotam、Dolev Shlomi、Kamei Sayaka、Ooshita Fukuhito、Wada Koichi
    • Journal Title

      Proc. 21st International Symposium on Stabilization, Safety, and Security of Distributed Systems

      Volume: - Pages: 16~21

    • DOI

      10.1007/978-3-030-34992-9_2

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Forgive & Forget: Self-Stabilizing Swarms in Spite of Byzantine Robots2019

    • Author(s)
      Ashkenazi Yotam、Dolev Shlomi、Kamei Sayaka、Ooshita Fukuhito、Wada Koichi
    • Journal Title

      11th International Workshop on Parallel and Distributed Algorithms and Applications (PDAA 2019)

      Volume: - Pages: 1~8

    • DOI

      10.1109/CANDARW.2019.00041

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Efficient Circuit Simulation in MapReduce2019

    • Author(s)
      Fabian Frei and Koichi Wada
    • Journal Title

      30th International Symposium on Algorithms and Computation (ISAAC 2019)

      Volume: - Pages: 52:1~52:21

    • DOI

      10.4230/LIPIcs.ISAAC.2019.52

    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Distributed Agreement and Robot Coordination2019

    • Author(s)
      Xavier Defago
    • Organizer
      JFLI-Tokyo Tech Workshop
    • Int'l Joint Research / Invited
  • [Presentation] Distributed Algorithms for Robot Systems2019

    • Author(s)
      Xavier Defago
    • Organizer
      149th NII Shonan Meeting
    • Int'l Joint Research / Invited
  • [Presentation] Model Checking Robot Algorithms in Euclidean Space2019

    • Author(s)
      Xavier Defago
    • Organizer
      第15回情報科学ワークショップ
    • Invited
  • [Presentation] Self-Stabilizing Gathering of Mobile Robots under Crash or Byzantine Faults2019

    • Author(s)
      Xavier Defago
    • Organizer
      2nd Japan-Taiwan Joint Workshop, Taipei, Taiwan
    • Int'l Joint Research / Invited
  • [Presentation] Brief Announcement: Neighborhood Mutual Remainder and its Self-Stabilizing Implementation of Look-Compute-Move Robots2019

    • Author(s)
      Shlomi Dolev
    • Organizer
      33rd International Symposium on Distributed Computing
    • Int'l Joint Research
  • [Presentation] Brief Announcement: Model Checking Rendezvous Algorithms for Robots with Lights in Euclidean Space2019

    • Author(s)
      Sebastien Tixeuil
    • Organizer
      33rd International Symposium on Distributed Computing
  • [Presentation] Dependability and Fault-Tolerance of Cooperative Mobile Robots: The Gap Between Theory and Pragmatism2019

    • Author(s)
      Xavier Defago
    • Organizer
      Pacific-Rim Intl. Symp. on Dependable Computing
    • Int'l Joint Research / Invited
  • [Presentation] Brief Announcement: Self-Stabilizing Implementation of LCM Robots2019

    • Author(s)
      Sayaka Kamei
    • Organizer
      21st International Symposium on Stabilization, Safety, and Security of Distributed Systems
    • Int'l Joint Research
  • [Presentation] Brief announcement: Forgive & Forget: Self-Stabilizing Swarms in Spite of Byzantine Robots2019

    • Author(s)
      Fukuhito Ooshita
    • Organizer
      21st International Symposium on Stabilization, Safety, and Security of Distributed Systems
    • Int'l Joint Research
  • [Presentation] Forgive & Forget: Self-Stabilizing Swarms in Spite of Byzantine Robots2019

    • Author(s)
      Fukuhito Ooshita
    • Organizer
      11th International Workshop on Parallel and Distributed Algorithms and Applications, in conjunction with CANDAR 2019
    • Int'l Joint Research
  • [Presentation] Efficient Circuit Simulation in MapReduce2019

    • Author(s)
      Koichi Wada
    • Organizer
      30th International Symposium on Algorithms and Computation (ISAAC 2019)
    • Int'l Joint Research
  • [Presentation] On Memory, Communication, and Synchronous Schedulers When Moving and Computing2019

    • Author(s)
      Koichi Wada
    • Organizer
      23rd International Conference on Principles of Distributed Systems,
    • Int'l Joint Research
  • [Presentation] Gathering on Rings for Myopic Asynchronous Robots with Lights2019

    • Author(s)
      Sayaka Kamei
    • Organizer
      23rd International Conference on Principles of Distributed Systems,
    • Int'l Joint Research

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Published: 2021-01-27  

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