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Mobile Information Systems
Volume 2015 (2015), Article ID 931765, 11 pages
Research Article

Data-Sharing Method for Multi-Smart Devices at Close Range

1Division of Computer Engineering, Sungkyul University, Gyeonggi-do 430-742, Republic of Korea
2Department of Global Media, Soongsil University, Seoul 156-743, Republic of Korea

Received 8 July 2015; Revised 22 October 2015; Accepted 9 November 2015

Academic Editor: Kamal Deep Singh

Copyright © 2015 Myoungbeom Chung and Ilju Ko. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We proposed a useful data-sharing method among multi-smart devices at close range using inaudible frequencies and Wi-Fi. The existing near data-sharing methods mostly use Bluetooth technology, but these methods have the problem of being unable to be operated using different operating systems. To correct this flaw, the proposed method that uses inaudible frequencies through the inner speaker and microphone of smart device can solve the problems of the existing methods. Using the proposed method, the sending device generates trigger signals composed of inaudible sound. Moreover, smart devices that receive the signals obtain the shared data from the sending device through Wi-Fi. To evaluate the efficacy of the proposed method, we developed a near data-sharing application based on the trigger signals and conducted a performance evaluation experiment. The success rate of the proposed method was 98.8%. Furthermore, we tested the user usability of the Bump application and the proposed method and found that the proposed method is more useful than Bump. Therefore, the proposed method is an effective approach for sharing data practically among multi-smart devices at close range.