• Digital Contents
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• no.9 s.124
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• pp.166-177
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• 2003

이동통신 3사(SKT, KTF, LGT)의 음성통화 및 무선데이터 서비스에 대한 품질평가 결과 대체적으로 양호한 것으로 나타났다. 정보통신서비스 품질평가협의회는 지난 4월부터 7월까지 측정한 이동통신 3사의 음성통화 및 무선데이터 서비스에 대한 평가결과를 지난달 13일 공개했다. 품질평가협의회에서는 사업자간 품질개선을 유도하고 순위비교를 통한 광고경쟁 등 부작용을 줄이기 위해 과거의 5단계 평가(수, 우, 미, 양, 가)방법을 '양호'와 '미흡'의 2단계로 조정해 평가했다.

• Review of KIISC
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• v.29 no.4
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• pp.25-28
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• 2019

본 논문에서는 국제전기통신연합(ITU)의 정보통신기술 표준을 담당하고 있는 ITU-T에서 보안 분야 표준을 제정하고 있는 SG17에서의 양자암호 표준화 동향을 소개하고자 한다. 양자암호통신은 더 이상 쪼갤 수 없는 물리량의 최소 단위인 양자(Quantum)의 특성을 이용해 도청 불가능한 암호키(Key)를 생성, 송신자와 수신자 양쪽에 나눠주는 기술로 이를 실제 다양한 보안 서비스에 적용하기 위해 필요한 구성 요소와 그 요소들 간의 상호호환성을 보장하기 위한 표준화 활동이 ITU-T SG17에서 진행되고 있어 그 내용을 간략히 살펴보았다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.07a
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• pp.397-398
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• 2022

본 논문에서는 SK텔레콤에서 진행하는 디지털 선도기업 아카데미 FLYAI의 교육과정을 설계하고 개발한다. 이 교육과정은 Project Based Learning(272시간)과 Product Based Learning(128시간)으로 구성하여 총 400시간을 교육하도록 설계한다. 특히 Product Based Learning의 AI-Hackathon(80시간)에서는 SK텔레콤 각 부서에서 제안하는 제픔을 기획하고 개발하는 과정으로 SK텔레콤 AI 개발자들이 멘토로 참여함으로써 기업 현장의 경험을 체험할 수 있도록 개발한다.

• Asia Marketing Journal
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• v.4 no.3
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• pp.42-54
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• 2002

KTF는 이동전화 시장에서 후발 주자임에도 불구하고 성공적인 마케팅을 하여 성장하였다. 그 성공요인이 무엇인지를 본 사례연구는 KTF의 세분시장별 브랜드전략에서 밝혀보고자 하였다. KTF는 시장 선도자인 SKT에 대응하여 다수의 세분시장(Multi-Segments)을 주목하고 각각의 세분시장에 맞는 브랜드 전략을 추진하였다. 그 중에서도 인구통계적 관점에서 13-18세 를 중심으로 한 틈새시장에 새로운 브랜드 Bigi를 출시한 KTF의 브랜드전략을 고찰하였다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.2
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• pp.171-179
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• 2011

In these days, various wireless internet services are possible since the advanced wireless networks enable to transfer more data than before and smarter devices have developed to display the multimedia information more efficiently. Therefore, Korean MIPS such as SKT and LGT provide many kinds of advanced services such as wireless on-line shopping, mobile banking system and etc using 2.5 generation wireless network technology and smartcards. In a transportation system, a cellular phone can be used as a useful payment tool since most people always keep it and a mobile payment system has developed as infrastructure for wireless on-line services. In this paper, a mobile transportation payment system is introduced. A driver needs to pay a toll fee when he/she uses the highways. Recently, a high pass system has introduced, in which a vehicle can pass a toll gate without stopping to pay the fee to a counter. The payment is done automatically by an attached payment device. We have developed an advanced mobile system in which a smartcard embedded cellular phone is used as a payment device. The personnel and financial information is stored at a smartcard and the communication between the phone and OBU(On Board Unit) is done by Bluetooth.

• The Journal of the Korea Contents Association
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• v.10 no.7
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• pp.187-197
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• 2010

This study compares the national telecom commercials during the World Cup in order to investigate the communication effects of sponsorship and ambush advertising. It conducts KTF and SKT advertising in 2006 as empirical study for exploring the communication effect. As a result, empirical study says that there is no difference between sponsorship and ambush advertising in terms of attitude toward advertising, and ambush advertising results in higher attitude toward brands than sponsorship ads. The significant difference is not found in free recall, the higher rate of miscognition occurs in ambush advertising. Thus, this study confirm the significant implication that sponsorship advertising and ambush advertising should be conducted under the long-term and consistent communication strategies. This means that corporate communication strategies through sports events should be carried out centering around the campaign. It is expected that the findings of this study contribute to develop the sponsorship theory and provide practical implications on campaign strategy to advertising specialists.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2007.11a
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• pp.341-356
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• 2007

We study factors that affect consumers' switching behaviors among service providers in Korean mobile telecommunications service market. For empirical analysis, quarterly time series data from the first quarter of 2004 through the second quarter of 2007 were used. We chose the number of switchers to each mobile service provider in each quarter as dependent variables. Independent variables include acquisition costs per subscriber, which play the role of subsidy to mobile handset, switching costs, time trend, structural change effect, and standby demand effects. Through the empirical analysis, we found that different providers' churn-in customers are affected by different factors. Specifically, the number of chum-in customers into SK Telecom is explained mainly by SK Telecom's customer acquisition costs and standby demand from KTF, while the number of customers switching into KTF is better explained by switching costs from the previous service provider and standby demand from SK Telecom. Those who chose LG Telecom as their new provider, on the other hand, were mainly attracted by LG Telecom's high subscriber acquisition cost.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.8
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• pp.3925-3932
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• 2013

Emotion is closely related to the life of human, so has effect on many parts such as concentration, learning ability, etc. and makes to have different behavior patterns. The purpose of this paper is to extract important features based on physiological signals to recognize negative emotion. In this paper, after acquisition of electrocardiography(ECG), electroencephalography(EEG), skin temperature(SKT) and galvanic skin response(GSR) measurements based on physiological signals, we designed an accurate and fast algorithm using combination of linear discriminant analysis(LDA) and genetic algorithm(GA), then we selected important features. As a result, the accuracy of the algorithm is up to 96.4% and selected features are Mean, root mean square successive difference(RMSSD), NN intervals differing more than 50ms(NN50) of heart rate variability(HRV), ${\sigma}$ and ${\alpha}$ frequency power of EEG from frontal region, ${\alpha}$, ${\beta}$, and ${\gamma}$ frequency power of EEG from central region, and mean and standard deviation of SKT. Therefore, the features play an important role to recognize negative emotion.

• Journal of Advanced Navigation Technology
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• v.24 no.2
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• pp.61-66
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• 2020

Since the ocean accounts for 70.8 percent of the earth's surface, the success of IoT technology in the marine industry is to collect information from devices placed in a wider range. LPWA is a feature with a wide range of communication and is very suitable for deployment in the ocean. In this paper, the real-sea performance distance experiment was carried out based on Private LoRa, a key technology for executing the electronic phrase real-name system. A private LoRa module based on sx1276 was developed, and Gateway was developed to transfer data received by private LoRa to the server using SKT Cat. M1. After installing gateways at 599 meters above sea level and experimenting with data transmission and reception at 25 km, 40 km and 60 km, we were able to see that the communication success rate was obtained to be 96.1%. 97.1% and 96.2% respectively.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.6
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• pp.1360-1364
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• 2013

Internet phone, communication cost and easy-to-use low-cost compared to the PSTN is a mobile phone of a conventional, and use of the Internet phone is spreading. Construction as part of the broadband convergence network(BCN), Internet service provider(KT, SKT, LGU+) has converted to Internet phone telephone network to all government agencies. In addition, members of the public also have an Internet phone service that you are using. In this paper, we analyze the hacking attack on IP-PBX in the IETF SIP-based that are used in Internet telephony, to the study. The test bed is constructed in the same way as the Internet telephone system to perform studies carried hacking attacks on IP-PBX, analyze the results and to extract evidence forensics. When used in crime by hacking the Internet telephone, we propose a method which can be used as evidence in forensic having legal effect.