• Journal of the Korea Convergence Society
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• v.3 no.3
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• pp.7-12
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• 2012

mVoIP (mobile Voice over Internet Protocol) service is a technology to transmit voice data through an IP network using mobile device. mVoIP provides various supplementary services with low communication cost. It can maximize the availability and efficiency by using IP-based network resources. In addition, the users can use voice call service at any time and in any place, as long as they can access the Internet on mobile device easily. However, SIP on mobile device is exposed to IP-based attacks and threats. Observed cyber threats to SIP services include wiretapping, denial of service, and service misuse, VoIP spam which are also applicable to existing IP-based networks. These attacks are also applicable to SIP and continuously cause problems. In this study, we analysis the threat and vulnerability on mVoIP service and propose several possible attack scenarios on existing mobile VoIP devices. Based on a proposed analysis and vulnerability test mechanism, we can construct more enhanced SIP security mechanism and stable mobile VoIP service framework after eliminating its vulnerability on mobile telephony system.

• Proceedings of the Korea Institute of Convergence Signal Processing
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• 2000.08a
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• pp.81-84
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• 2000

본 논문은 국제통신연합 전파통신분야(ITU-R)의 간섭분석기의 표준으로 채택한 몬테카를로 기법을 기초로 하여 개발된 간섭분석기를 이용하여 개인 통신 서비스(Personal Communication Service)의 도심지 환경에서 수신 전계강도를 예측하였다. 또한 실제로 측정된 수신 전계강도와 비교하여 간섭분석기의 신뢰도를 검증하였다. 개발된 간섭분석기는 한국 지형에 적합한 전파 전파 모델인 수정된 하타(Modified Hata) 모델을 적용하여 개발하였고, 국내 PCS(IS-95A) 서비스 환경과 규격을 고려한 시나리오를 설정하여 모의 실험을 수행하였다. 실험 결과 간섭 분석기와 실제 측정 수신 전계 강도 사이에는 0.03dBm의 평균오차를 가지며, 이는 간섭분석기를 통해 얻어진 결과가 실제와 매우 유사함을 보여준다.

• Journal of the Society of Disaster Information
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• v.20 no.2
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• pp.315-328
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• 2024

Purpose: The purpose of this paper is to present a service construction plan using multiple complex sensor information to detect abnormal situations in urban life safety that are difficult to identify on CCTV. Method: This study selected service scenarios based on actual testbed data and analyzed service importance for local government control center operators, which are main users. Result: Service scenarios were selected as detection of day and night dynamic object, Detection of sudden temperature changes, and Detection of time-series temperature changes. As a result of AHP analysis, walking and mobility collision risk situation services and fire foreshadowing detection services leading to immediate major disasters were highly evaluated. Conclusion: This study is significant in proposing a plan to build an anomaly detection service that can be used in local governments based on real data. This study is significant in proposing a plan to build an anomaly detection service that can be used by local governments based on testbed data.

• Convergence Security Journal
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• v.3 no.3
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• pp.67-74
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• 2003

Home network technologies which interconnect various wire and wireless home appliances, access network technologies and service offer technologies are continuing growth. To provide secure services in the home, home network environment, access network environment, and various service and contents offer technologies are consist organically. Thesis of administration method of systematic and effective groove network is most urgent and important urea to offer safety and authoritativeness of home networking service in home network that strong certification and security function are required among these technologies. In this paper, we propose home gateway security management architecture and the way to use SNMPv3. Also, we propose structure and function of home network management system to support various home networking security scenarios.

• Convergence Security Journal
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• v.19 no.4
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• pp.189-195
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• 2019

PPL advertising is growing due to the cheaper cost than other TV commercials, the familiar image construction from natural exposure in video, and the overseas marketing effects from programs export. However, it is difficult to provide additional information on PPL advertising targets in addition to short video exposure due to the restriction that they should be exposed without antagonizing viewers. This study designed a data service that supports PPL advertising, which provides additional information for PPL advertising targets. Specifically, the user scenario and user interface of the data service were designed considering the characteristics of the TV platform, the key additional information was defined by distinguishing the typical types of PPL advertisement, and the information on when PPL advertising targets should be exposed in the program was devised. We also developed a DVB-SI based method to provide the supplementary information to the data service.

• Journal of the Korea Convergence Society
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• v.8 no.11
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• pp.77-83
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• 2017

For efficient predictive analysis, self-healing research is needed that enables the system to recover autonomously by self-cognition and diagnosing system problems. However, software development does not provide formal contextual information analysis and appropriate presentation structure according to external situation. In this paper, we propose a prediction analysis method based on the change contents by applying the extraction rule to the functions that can act, data, and transaction based on the new Goal-scenario. We also evaluated how well the predictive analysis met through the performance indicators for achieving the requirements goal. Compared with the existing methods, the proposed method has a maximum 32.8% higher matching result through performance measurement, resulting in a 28.9% error rate and a 45.8% reduction in the change code. This shows that it can be processed into a serviceable form through rules, and it shows that performance can be expanded through predictive analysis of changes.

• Convergence Security Journal
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• v.18 no.3
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• pp.61-68
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• 2018

As the digital broadcasting era settled in, the TV, which was only used to watch broadcast programs, developed as a medium for operating various data services. This means that an environment, in which the viewers' TV usage behavior can be changed from a passive attitude to an attitude of actively consuming the media, has been established. Since the advertising market is an industry that is heavily influenced by changes in the media, these changes causes changes in the form of advertising and the advertising consumption behavior of viewers. In this environment, the broadcasting industry needs to think about the new growth strategy that links the possibility of data service with the advertisement market. In this study, we designed a data service that provides supplementary information of an ID advertisement, which has the weakness of short exposure time and shortage of information expression space. Specifically, we have designed the usage scenario and user interface of the data service and developed a method, based on the international digital broadcasting standard DV B, that provides the supplementary information defined by the type of ID advertisement to the data service.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2008.11a
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• pp.55-58
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• 2008

IPTV 기반의 이러닝 마켓플레이스는 IPTV를 통한 이러닝 서비스 제공을 하기 위한 교육 콘텐츠 공급자와 수요자간의 마켓플레이스로써, 이는 양방향 매체 하에서의 이러닝 서비스로써 많은 관심의 대상이 되고 있으며, 방송통신융합의 초기 단계에서 IPTV는 다양한 콘텐츠와 서비스 모델의 개발을 통하여 그 효용성을 높이는데 기여를 할 수 있을 것이다. 본 논문에서는 IPTV기반의 이러닝 마켓플레이스에서 핵심적인 프레임워크를 구성하기 위하여 이러닝, e-마켓플레이스, IPTV에서의 특징과 기존의 이러닝 마켓플레이스들의 기능을 매트릭스를 통한 비교분석으로 기본요소를 추출하고, 이를 통하여 프레임워크를 구성한다. 또한 비즈니스모델 개발을 위하여 비즈니스모델설정, 참여자/역할, 제품/서비스 커버리지, 운영시나리오, 수익모델을 작성하고 이를 통하여 실제적으로 비즈니스모델의 구현이 가능한지를 검증한다.

• 한국HCI학회:학술대회논문집
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• 2008.02b
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• pp.317-322
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• 2008

WCDMA 의 등장으로 영상통화를 지원하는 휴대폰의 보급은 빠르게 확산되고 있다. 하지만 예상과 달리 사용자들의 실제 영상통화 이용율은 그리 활성화 되지 못하고 있는 실정이다. 본 연구자들은 이러한 현상이 나타나게 된 원인이 영상통화 기능이 단순한 통화기능으로만 활용될 뿐 그 실질적 효용성이 높지 못하기 때문이라 판단하여, 영상 통화를 활성화 시킬 수 있는 방안에 대한 연구를 진행하였다. 오늘날 IT 기반의 서비스 중에 매우 활성화 된 것이 쇼핑 관련 서비스이다. 무선 인터넷과 모바일 환경에서 금융과 통신의 융합이 사회적 화두로 떠오르고, 이러한 이유로 영상통화 기능을 쇼핑과 연계한다면 그 효용성이 매우 커질 것으로 판단하였다. 그리하여 본 연구에서는 사용자 행태 조사을 통해 그들의 needs 를 범주화하고 분석하여 영상통화 쇼핑 서비스 어플리케이션을 도출하였다. 그리고 도출된 어플리케이션의 세부적 절차와 원활한 인터페이스의 설계를 위해 시나리오 형식으로 개방하여 그 형태를 구체화시키고자 하였다.

• Journal of the Korea Convergence Society
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• v.6 no.4
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• pp.243-248
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• 2015

U-Healthcare is a convergence service with medical care and IT which enables to examine, manage and maintain the patient's health any time and any place. For communication conducted in U-Healthcare service, the transmission methods are used that patient's medical checkup analysis results or emergency data are transmitted to hospital server using wireless communication method. At this moment when the attacker who executes the malicious access makes DRDoS(Distributed Reflection DoS) attack to U-Healthcare devices or BS(Base Station), various damages occur that contextual information of urgent patients are not transmitted to hospital server. In order to deal with this problem, this study suggests DRDoS attack scenario and countermeasures against DRDoS and converges with Big Data which could process large amount of packets. When the attacker attacks U-Healthcare devices or BS(Base Station), DB is interconnected and the attack is prevented if it is coincident. This study analyzes the attack method that could occur in U-Healthcare devices or BS which are remote medical service and suggests countermeasures against the security threat using Big Data.