• Proceedings of the Korean Society of Computer Information Conference
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• 2015.01a
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• pp.67-70
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• 2015

특정 인터넷 서비스는 그 성격에 따라 제한된 위치에서만 서비스를 제공하도록 설계한다. 이러한 시스템 구조에서 사용자의 위치정보는 서비스 접근을 통제하는 과정에서 핵심적으로 사용되며 LSB(Location Based Service), WPS(Wifi Positioning System)와 같은 기술로 제안되었다. 그러나 기존 인증 기법은 대상이 일정하지 않은 불특정 다수의 사용자가 접근하기에 적합하지 않고, 서비스 공급자의 무선 AP를 이용하기 때문에 과도한 서버 부하에 취약하다. 따라서 본 논문에서는 이러한 문제를 해결하기 위해서 Beacon을 이용한 위치기반 인증 시스템을 제안한다. Beacon이란 Bluetooth 기술을 기반으로 근거리 무선 통신 기기이다. 사용자가 서비스 접근 권한을 획득하기 위해 인증 서버에서 요구하는 인증 코드는 BLE(Bluetooth Low Energy)를 사용하는 Beacon이 브로드캐스팅한다. 즉, 사용자는 Beacon이 BLE로 브로드캐스팅한 데이터를 수신할 수 있는 물리적인 범위까지 접근해야 인증 절차를 수행할 수 있다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2016.07a
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• pp.139-140
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• 2016

iBeacon의 메시지를 이용하여 단일의 iBeacon 만으로도 정확한 거리를 측정할 수 있는 거리 측정 보정 방안을 제시한다. 이를 위해 iBeacon 메시지를 분석하여 축적된 데이터를 Smoothing을 통해서 오차 범위를 줄이고 거리에 따른 신호강도를 예측할 수 있는 방안을 제시한다. 이를 통해 신호간섭 및 거리 이동에 따른 iBeacon 메시지를 적게 수신하더라도 정확한 위치를 예측할 수 있는 방안을 제시한다.

• Journal of KIISE
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• v.42 no.8
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• pp.979-989
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• 2015

Machine to Machine (M2M) technology has gained attention due to the fast diffusion of Internet of Things (IoT) technologies and smart devices. Most wireless network experts believe that Bluetooth Low Energy (BLE) Communications technology in an iBeacon network has amazing advantages in terms of providing communication services at a low cost in smartphone applications. Specifically, BLE does not require any pairing process during its communication phases, so it is possible to send a message to any node without incurring additional transmissions costs if they are within the BLE communication range. However, BLE does not require any security verification during communication, so it has weak security. Therefore, a security authorization process would be necessary to obtain customer confidence. To provide security functions for iBeacon, we think that the iBeacon Message Encryption process and a Decryption (Authorization) process should be designed and implemented. We therefore propose the BLE message Authorization Mechanism based on a One Time Password Algorithm (BLE-OTP). The effectiveness of our mechanism is evaluated by conducting a performance test on an attendance system based on BLE-OTP.

• Journal of the Korea Convergence Society
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• v.10 no.5
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• pp.125-131
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• 2019

This study tries to grasp the factor that affects the acceptance of beacon as an O2O marketing tool. This study examined whether there is a difference between beacon accepter as a means of marketing communication and non-accepter in terms of related variables. As a result, there were significant differences between beacon perceiver and non-perceiver in 'smartphone usage' and 'brand consciousness'. In order to understand the predictive variables influencing beacon acceptance as a means of marketing communication, this study used 'perceiving beacon as a marketing communication media' as a dependent variable to perform logistic regression analysis. As a result of the analysis, it was found that 'smartphone usage' and 'brand consciousness' were the predictive variables affecting beacon perceiving. This study tried to analysis the results in the viewpoint of perceived usefulness and ease-of-use which were insisted by TAM.

• ETRI Journal
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• v.38 no.5
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• pp.879-884
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• 2016

In this paper, an ultra-small marker beacon antenna operated in the VHF-band is proposed. This antenna has a modified linear IFA structure with a lumped capacitor and a capacitive plate for frequency tuning and impedance matching. The capacitive plate is directly connected to the end of a linear radiator and is separated from the antenna ground by 1 mm. The main operating frequency is mainly controlled by the size and dielectric constant of the capacitive plate. The lumped capacitor is useful for fine frequency tuning. Using the proposed structure, an ultra-small marker beacon antenna can be realized with a length of 0.04 ${\lambda}_0$.

• Proceedings of the Korean Information Science Society Conference
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• 2010.06d
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• pp.402-407
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• 2010

본 논문에서는 BOP(Beacon Only Period)를 포함하고 있는 MAC Superframe 구조에서의 beacon routing 방법을 제안한다. 노드들간의 communication 패턴은 노드들이 데이터를 sink로 전송하는 'nodes-to-sink reporting'을 기준으로 한다. Beacon routing은 매주기마다 전송하는 beacon에 routing을 위한 정보를 실어서 보내고 이 정보를 바탕으로 routing path를 설정하는 방법이다. 이 방법을 이용하면 routing을 결정할 때 beacon을 이용하기 때문에 라우팅을 위한 추가적인 패킷 전송이 없고, 경로 변경시 routing path를 실시간으로 변경할 수 있는 장점이 있다. 사용된 Routing 알고리즘은 4개의 cost 계산 방법을 제안한다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.17 no.3
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• pp.107-114
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• 2017

In beacon-enabled mode, beacon collision is a significant problem for the scalability of cluster-tree wireless sensor networks. In this paper, multi-channel time division scheduling (MCTS) is proposed to prevent beacon collisions and provide scalability. A coordinator broadcasts a beacon frame, including information on allocated channels and time-slots, and a new node determines its own channel and time-slot. The performance of the proposed method is evaluated by comparing the proposed approach with a typical ZigBee. MCTS prevents beacon collisions in cluster-tree wireless sensor networks. It enables large-scale wireless sensor networks based on a cluster tree to be scalable and effectively constructed.

• Journal of Information Technology Services
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• v.11 no.4
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• pp.195-213
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• 2012

In ubiquitous environments, the Intelligent Transportation System (ITS) protocol is a typical service used to improve the quality of life for humans. The Vehicular Ad-hoc Network (VANET) protocol, a part of ITS, needs further study with regards to its support for high reliability, high speed mobility, data transmission efficiency, and so on. The IEEE 802.11 standard provides a high data rate channel, but it was designed for peer-to-peer network protocols. IEEE 802.11p also provides a high data rate channel, however, it only facilitates communication between roadside and on-board equipment. A VANET has characteristics that enable its topology to change rapidly; it can also be expanded to a multi-hop range network during communication. Therefore, the VANET protocol needs a way to infer the current topology information relating to VANET equipped vehicles. In this paper, we present the Multi-Beacon MAC Protocol, and propose a method to resolve the problem of beacon collisions in VANET through the use of this Multi-Beacon MAC protocol. Evaluation of the performance of Multi-Beacon MAC protocol by means of both mathematical analyses and simulation experiments indicate that the proposed method can effectively reduce beacon collisions and improve the throughput and the delay between vehicles in VANET systems.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.1
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• pp.97-103
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• 2018

In satellite communication, modulated beacon signal is spreaded by gold sequence and the modulated beacon is transmitted via linear phase modulation. Due to the difference in characteristics of the satellite and the receiver on the ground, frequency offset (FO) occurs. An existing modulated beacon receiver is a method of synchronizing the frequency of a modulated beacon signal using FFT(Fast Fourier Transform), which not only increases the delay and complexity in terms of system implementation but also has a separate circuit for compensating the phase difference due to FO and phase offset from FFT points. In order to overcome this problem, this paper proposes and analyzes a scheme for compensating and demodulating the coarse FO and phase offset at one time using the 2-phase shaped characteristics of the modulated beacon signal. Also, through the simulation, the modulation index suitable for the proposed method is analyzed and the appropriate cumulative number is also analyzed.

• Journal of Digital Convergence
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• v.16 no.2
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• pp.287-292
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• 2018

The purpose of this study is suggest the guideline by analyzing and categorizing the case of trends of Beacon technological development and Beacon-Based service in culture and art space of domestic and overseas. I did some literature research followed with theoretical background of beacon service, also did case study of beacon service application in domestic and overseas culture space. The result indicate that beacon technology can provide a variety services in a wide space. Through domestic and overseas case studies, it was found that beacon service in domestic exhibition space should be given as experience-oriented services beyond benefit-oriented services. As this point of time, this study will become a good resource for various communication services through beacon service in Korea.