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Title
Japanese: 
English:Experimental Analysis of Communication Relaying Delay in Low-Energy Ad-hoc Networks 
Author
Japanese: 宮 太地, 大島 浩太, 北口 善明, 山岡 克式.  
English: Taichi Miya, Kohta Ohshima, Yoshiaki Kitaguchi, Katsunori Yamaoka.  
Language English 
Journal/Book name
Japanese: 
English:Proc. of the 2021 18th IEEE Annual Consumer Communications and Networking Conference (CCNC2021) - Poster 
Volume, Number, Page         pp. 1-2
Published date Jan. 2021 
Publisher
Japanese: 
English:The Institute of Electrical and Electronics Engineers 
Conference name
Japanese: 
English:The 2021 18th IEEE Annual Consumer Communications and Networking Conference (CCNC2021) 
Conference site
Japanese: 
English:Virtual Conference 
Official URL https://ieeexplore.ieee.org/document/9369530
 
DOI https://doi.org/10.1109/CCNC49032.2021.9369530
Abstract In recent years, more and more applications use ad-hoc networks for local M2M communications, but in some cases such as when using WSNs, the software processing delay induced by packets relaying may not be negligible. In this paper, we planned and carried out a delay measurement experiment using Raspberry Pi Zero W. The results demonstrated that, in low-energy ad-hoc networks, processing delay of the application is always too large to ignore; it is at least ten times greater than the kernel routing and corresponds to 30% of the transmission delay. Furthermore, if the task is CPU-intensive, such as packet encryption, the processing delay can be greater than the transmission delay and its behavior is represented by a simple linear model. Our findings indicate that the key factor for achieving QoS in ad-hoc networks is an appropriate node-to-node load balancing that takes into account the CPU performance and the amount of traffic passing through each node.

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