Takahiro Ueda¹, Tetsuro Katayama¹, Yoshihiro Kita², Hisaaki Yamaba¹, Kentaro Aburada¹, Naonobu Okazak^i1
1Department of Computer Science and Systems Engineering, Faculty of Engineering, University of Miyazaki, 1-1 Gakuen-kibanadai nishi, Miyazaki, 889-2192 Japan
²Department of Information Security, Faculty of Information Systems, Siebold Campus, University of Nagasaki, 1-1-1 Manabino, Nagayo-cho, Nishi-Sonogi-gun, Nagasaki, 851-2195 Japan
pp. 136–142
ABSTRACT
This paper proposes Gamma, which is a messaging platform for spatial data. Gamma uses distributed MQTT system for spatial data sharing, and this paper aims to improve the usefulness of distributed MQTT system. In the experiment, it has been found that Gamma can process more messages than a single MQTT broker. It is confirmed that Gamma achieves scalability by increasing the number of Gateways and distributed MQTT brokers. Furthermore, it is confirmed that the efficiency of the distributed MQTT system can be improved by setting the responsibility area of Gateways.
Keywords : MQTT, Spatial data, Load management, Information management

© 2022 The Author. Published by Sugisaka Masanori at ALife Robotics Corporation Ltd This is an open access article distributed under the CC BY-NC 4.0 license ( h ttp://creativecommons.org/licenses/by-nc/4.0/).

ARTICLE INFO
Article History
Received 25 November 2021
Accepted 03 July 2022

J-STAGE9206

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