In this paper, we proposed the effective short-distance transmission of advertisements for
smart-devices using high-frequencies that are not audible to humans. The existing methods …

Because wireless communications with inaudible high-frequency signals are used in limited
areas due to their low speed, this paper proposes a data communications method using the …

This paper introduces a new method to transmit digital data through Global System for
Mobile communications (GSM) voice channel. A novel algorithm is proposed to design a set …

For wireless control between smart devices, recent studies have mainly used Wi-Fi or
Bluetooth technology. However, for Wi-Fi, the user requires extra infrastructure such as an …

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 …

In this paper, we proposed data communication method based on inaudible sound which
the most people cannot listen to at near field. The proposed method can transmit some bits …

Various technologies using wireless access points, camera recognition, transportation
cards, and Bluetooth beacons have recently been proposed for use in measuring …

The growing use of public blockchain-based virtual cryptocurrency calls for secure
management of blockchain account information managed through cryptocurrency wallet …

Currently, many people enjoy videos and music content through their smart devices while
using public transportation. However, because passengers focus so much on content on …

Recently, people have come to enjoy using movies and music applications, such as
YouTube, Netflix, and Watcha Play, on their smart devices while riding public transportation …