2015 Fiscal Year Research-status Report
Study and development of smart supermarket by using visible light communication (VLC) and smartphone technologies
| Project/Area Number |
15K00134
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| Research Institution | The University of Aizu |
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Principal Investigator |
Anh・T Pham 会津大学, コンピュータ理工学部, 教授 (80404896)
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| Co-Investigator(Kenkyū-buntansha) |
Cohen Michael 会津大学, コンピュータ理工学部, 教授 (20254063)
Truong CongThang 会津大学, コンピュータ理工学部, 准教授 (40622957)
Julian Villegas 会津大学, コンピュータ理工学部, 准教授 (50706281)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | VLC Network / RFID / Indoor Localization / audible signals / Video Streaming / HTTP/2 / Security / Internet of Things |
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| Outline of Annual Research Achievements |
At the CCL, we focused on WP1 and WP2, including both theoretical studies and implementations. In particular, we completed development of the Arduino-based VLC receiver and successfully transferred the VLC beacon signal to a Google Android tablet (WP1). Regarding the WP2, in the first year of the project, we especially focused on study on enabling technology for VLC-based networks. Especially, we studied adaptation methods for video streaming over Hypertext Transfer Protocol (HTTP/2), which help to maintain smooth streaming data to mobile users. In addition, we also carried out studies on methods for optimizing data transmission for multiple users over VLC networks.
At the CAL group, we also have made progress on WP3 (smart-device apps development) and WP4 (Development of cloud-based data analysis model). In particular, on WP3, efforts have been made on enhancing the indoor localization capabilities of smart devices: we have made a feasibility study on the use of the microphones embedded in smartphones to receive near-ultrasonic signals from regular loudspeakers as a redundancy measure for VLC communications. This redundancy could help to decrease the size of the identifiers within a VLC cell. Regarding WP4, we have made preliminary research on the use of R for cloud-based data analysis. By using a set of R libraries, we have successfully queried large databases to visualize temporal patterns, as well as central tendency figures, zone averages, etc. We are now working on the integration of this mechanism with data mining libraries needed for the Smarket project.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
In the AY2015, two groups at Computer Communications Lab. (lead by Prof. A. Pham) and Computer Arts Labs (lead by Associate Prof. J. Villegas focuses on parallel issues of the projects. In each groups, we had weekly meeting to confirm the progress of the project. The overall project is managed by Prof. A. Pham in the collaboration with Associate Prof. J. Villegas. We had monthly meetings to synchronise and to update progress of the both teams.
With above mentioned efforts and coordinations, our joint project is being progressed as the initial plan. The result from the first year the project, including both proof-of-concept implementation and study of enabling technologies, also meets our initial target. In overall, besides the first success of the (partial) implementation of the proof-of-concept system, we have published two (02) journal articles and seven (07) international conference papers from research activities of the project.
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| Strategy for Future Research Activity |
From 2016, both groups at CCL and CAL will still focus on both studies of enabling technologies for VLC and sound-based localization, VLC networks as well as communication techniques for transmitting data over to mobile users. Especially, we focus on (1) a new topic of security for VLC network, (2) extend the concept of using near-ultrasonic signals to improve the accuracy of indoor positioning, and especially (3) the development of framework of cloud-based data analysis model for the smart sale support system, which is also an important issue of the Smarket project.
At the same time, we also initiate the WP5 to integrate and to evaluate the developed hardware prototype, software apps and service servers. The implementation goal is to comprehensively demonstrate the complete system by the end of the second year.
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| Causes of Carryover |
We did not use the travel budget for oversea travel.
Instead, we attended an international conference that was organized in Japan. As a result, the travel budget is lower than planned.
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| Expenditure Plan for Carryover Budget |
We will use the budget for attending conference oversea, which has been scheduled.
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| Remarks |
This is the website for the joint Kakenhi project 15K00134 between Computer Communications Lab. and Computer Arts Lab., the University of Aizu.
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