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Paper Abstract and Keywords
Presentation 2026-07-30 13:25
[Invited Lecture] Fluctuation Reduction and Implementation of Autonomous Decentralized Collision Avoidance via Desynchronization of Nonlinear Oscillators
Kana Kubota, Dai Kojima (Tokyo Univ. of Science), Hiroyuki Yasuda (Chiba Inst. of Tech.), Song-Ju Kim (SOBIN), Ryosuke Isogai, Yoshifumi Yoshida (Seiko Future Creation), Jin Nakazato (Tokyo Univ. of Science), Maki Arai (Shibaura Inst. of Tech.), Mikio Hasegawa (Tokyo Univ. of Science)
Abstract (in Japanese) (See Japanese page) 
(in English) In high-density IoT environments where many devices share the same wireless channel, frequent packet collisions degrade communication quality, necessitating efficient and energy-saving access control. An autonomous decentralized collision avoidance method based on nonlinear oscillator synchronization has been proposed in prior work. Each device internally computes a phase oscillator model and transmits packets at a specific phase. Based on the phase difference to its closest-phase neighbor, each device adjusts its own phase to move away from the neighbor through a coupling function, and by repeating this interaction, all devices converge to equally spaced transmission timings, thereby avoiding collisions. However, the conventionally used sinusoidal coupling function retains strong interactions after convergence, causing large steady-state fluctuations. To address this, we adopt a linear coupling function and introduce a parameter $alpha$ controlling its slope. Experiments on the Lazurite 920J, an IEEE 802.15.4g/4e-compliant IoT device also adopted in Wi-SUN, demonstrate that adjusting $alpha$ effectively suppresses steady-state fluctuations after convergence.
Keyword (in Japanese) (See Japanese page) 
(in English) IoT / nonlinear oscillator / collision avoidance / autonomous decentralized control / / / /  
Reference Info. IEICE Tech. Rep.
Paper #  
Date of Issue  
ISSN Online edition: ISSN 2432-6380
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Conference Information
Committee NS SeMI RISING  
Conference Date 2026-07-30 - 2026-07-31 
Place (in Japanese) (See Japanese page) 
Place (in English) NTT WEST PRISM + Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To RISING 
Conference Code 2026-07-NS-SeMI-RISING 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Fluctuation Reduction and Implementation of Autonomous Decentralized Collision Avoidance via Desynchronization of Nonlinear Oscillators 
Sub Title (in English)  
Keyword(1) IoT  
Keyword(2) nonlinear oscillator  
Keyword(3) collision avoidance  
Keyword(4) autonomous decentralized control  
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1st Author's Name Kana Kubota  
1st Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
2nd Author's Name Dai Kojima  
2nd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
3rd Author's Name Hiroyuki Yasuda  
3rd Author's Affiliation Chiba Institute of Technology (Chiba Inst. of Tech.)
4th Author's Name Song-Ju Kim  
4th Author's Affiliation SOBIN Institute LLC (SOBIN)
5th Author's Name Ryosuke Isogai  
5th Author's Affiliation Seiko Future Creation Inc. (Seiko Future Creation)
6th Author's Name Yoshifumi Yoshida  
6th Author's Affiliation Seiko Future Creation Inc. (Seiko Future Creation)
7th Author's Name Jin Nakazato  
7th Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
8th Author's Name Maki Arai  
8th Author's Affiliation Shibaura Institute of Technology (Shibaura Inst. of Tech.)
9th Author's Name Mikio Hasegawa  
9th Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
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Speaker Author-1 
Date Time 2026-07-30 13:25:00 
Presentation Time 25 minutes 
Registration for RISING 
Paper #  
Volume (vol) vol.126 
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