公益財団法人

セコム科学技術振興財団

研究成果報告書

研究課題名

大規模災害時にも機能する「助け合い通信」の創造・実装・展開
Creation, Implementation, and Development of Cooperative Communication Platformworking under Large-Scale Disaster

研究期間
平成２５年 ４月 ～ 平成２９年 ３月

報告年月
平成２９年 ６月
研究代表者
慶應義塾大学 理工学部 システムデザイン工学科

教授

小國 健二
Keio University

Faculty of Science and Technology
Professor
Kenji Oguni

Department of System Design Engineering

Abstract
When a strong and large earthquake hits a densely-populated area, the function of the whole
city would be lost. Under this situation, many people would try to walk home. For these people underdifficulty, the information in their walking distance (within the radius of a few kilometers) is very
important. If the real-time information in the city (such as the road condition, the situation at andaround the train stations, and the availability of the restrooms in the convenience stores) can beobtained, things could be easier for these people.
However, the communication infrastructure could be damaged and could be suspended in thearea under a large-scale disaster. In this sense, people walking in the damaged area right after thestrong earthquake do not have any measure for obtaining the real-time local information.
To solve this problem, “cooperative communication platform” has been invented. The
smartphones and the mobile music players are equipped with near field wireless communication
devices such as Bluetooth. These devices can be used for exchanging small pieces of information
when people walk and pass each other. The successive exchange of the information by the chain ofpassing-each-other could widely spread the information among the mobile communication devices
carried by the people walking in the city right after large-scale disaster.
The final goal of this research project is to create and implement the system that enables thepeople walking in the city to obtain the local (within the radius of a few kilometers) information in areal-time manner through the cooperative communication platform. This system should beimplemented in the real world in a sense that the mobile communication devices carried by thepeople walking in the city (with completely suspended information infrastructure right afterlarge-scale disaster) can automatically receive real-time information and this information is shownon the offline maps in these mobile devices.
In the first year of this research project, the prototype of the iOS application for cooperative
communication platform was developed. Using this prototype, experiments by hundreds of people
carrying the mobile device were carried out. The experiment in the Ueno Zoo has proved that theinformation is properly spread among the people as expected by the simulation. The experiment in
the Hiyoshi campus at Keio University has proved that the cooperative communication platform
properly works for exteremely dense deployment of the mobile devices. In the second and the thirdyear of this research project, the iOS application implementing the cooperative communication “te tote” has been released and a social experiment has been performed in the city of Kanazawa. At thesame time, the patent for the fundamental part of the cooperative communication platform has beenapproved. In the last year of this research project, corresponding to the major update of the iOS, “teto te-MPC” has been developed. "te to te-MPC” is also equipped with the offline map.
As a result of this research project, the cooperative communication platform is almost ready for
deployment in the real world. The next step of this research project is the more aggressive promotionof “te to te-MPC” for development of the cooperative communication platform in the real world.