• The Journal of Korean Institute of Communications and Information Sciences
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• v.32 no.11A
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• pp.1128-1137
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• 2007

Recently, according to being advanced internet, mobile communication technique, Telematics environment which users in vehicle can use internet service in LAN(Local Area Network) via mobile device has being realized. In this paper, we propose the remote user authentication protocol to solve these issues. Additionally, we use biometrics(fingerprint) for our user authentication protocol cause it can provide to avoid critical weakness that can be lost, stolen, or forgotten and to make authentication easily. In our user authentication protocol, to protect the biometric we use session key which is generated from master key distributed in our key distribution protocol. In particular, we propose secure protocol between APs considering weakness of security in mobile environment. Based on implementation of our proposed protocol, we conform that our proposed protocols are secure from various attack methods and provide real-time authentication.

• 한국ITS학회지
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• v.1 no.1
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• pp.28-32
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• 2003

가속화된 자동차의 대중화로 차량증가에 따른 도로의 확장 및 신설에만 의존해오던 기존의 틀을 벗어나 첨단정보통신기술을 이용하여 도로교통 정보를 신속히 수집하고 교통정보 이용자에게 실시간으로 분배함으로써 효율적인 교통관리가 가능한 지능형 교통시스템의 도입이 시작하였다. 최근, 공중 무선 통신망과 달리 도로상에서 고속 주행중인 차량을 대상으로 하여 도로변에 비교적 간단한 기지국 시스탬을 설치하고 저가의 통신단말기로서 사용자에게 값싼 서비스를 제공할 수 있는 장점을 가지고 있을 뿐 만 아니라 적은 비용으로 교통정보수집 및 제공뿐만 아니라, 인터넷 접속, e-mail 송수신 디지털 음성 및 비디오 파일 다운로드가 가능한 텔레메틱스 서비스가 급속도로 가속화하고 있다. 본 고에서는 텔레메틱스 서비스가 차량과 접목된 이동 무선 데이터 통신 기술과 함께 발전 될 전망으로 요소기술을 살펴보았다.

• Korea Multimedia Society
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• v.7 no.4
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• pp.40-51
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• 2003

• Digital Contents
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• no.5 s.132
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• pp.131-133
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• 2004

• Digital Contents
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• no.8 s.135
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• pp.119-121
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• 2004

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.11 no.1
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• pp.86-91
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• 2012

To provide high voice quality of real-time voice communication based on telematics exposed to various noise environments, the noise reduction algorithm with low computing load is required to effectively remove the noise. In this paper, we propose a noise reduction algorithm based on Mel-Filter and illustrate the proposed algorithm comparing with conventional noise reduction algorithms. As a experimental result that evaluates the performance of the noise reduction algorithms under the car and babble noise environments, the proposed noise reduction algorithm has the lower computing load with the similar PESQ score compared to the conventional noise reduction algorithms. It proves that the proposed noise reduction algorithm can efficiently remove the noise in mobile telematics.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.1 no.1
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• pp.91-104
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• 2006

Telematics is spotlighted as the future industry and anticipated the rapid growth. But it is not showing the expected development because of technical and economical blocks. So that there would happen a setback in setting the u-Transportation strategy which is the advanced national transportation system by the year 2020. In this paper, the stat of arts about related technology are introduced, which could give a solution in the technical and economical demerits and design the revitalization in ITS based on Telematics. And also the present application condition in RFID (Radio Frequency Identification) which would be the Blue Ocean in the Ubiquitous construction industry is researched and the commercialization scheme is studied.

• Digital Contents
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• no.6 s.133
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• pp.136-139
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• 2004

행복한 결혼은 상대가 상대를 서로 이해하고 협력하는 모습에서 가능하듯이 텔레매틱스 산업에서 디지털콘텐츠와의 행복추구는 정보 공유를 전제해 디지털콘텐츠를 서비스해야 된다. ‘가장 간단한 것이 좋은 것’이라는 니콜라스 네크로폰테의 조언과 같이 디지털콘텐츠의 행복한 결혼이 되기 위해서는 자동차 유저의 요구부터 파악해 공감대 내지는 타당성을 찾아 이를 발전시키는 자세가 절실하다.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.9 no.2
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• pp.104-109
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• 2010

In this paper, we propose a user authentication technology to protect wiretapping and attacking from others in the telematics environment, which users in vehicle can use internet service in local area network via mobile device. In the proposed user authentication technology, the packet speech data is encrypted by speech-based biometric key, which is generated from the user's speech signal. Thereafter, the encrypted data packet is submitted to the information communication server(ICS). At the ICS, the speech feature of the user is reconstructed from the encrypted data packet and is compared with the preregistered speech-based biometric key for user authentication. Based on implementation of our proposed communication method, we confirm that our proposed method is secure from various attack methods.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.11 no.3
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• pp.48-54
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• 2012

The quality of real-time voice communication over Internet Protocol networks based on telematics is affected by network impairments such as delays, jitters, and packet loss. To resolve this issue, this paper proposes a receiver-based enhancing method of VoIP speech quality. The proposed method enables users to deliver high-quality voice using playout control and signal reconstruction, which consists of concealment of lost packets, adaptive playout-buffer scheduling using active jitter estimation, and smooth interpolation between two signals in a transition region. The proposed algorithm achieves higher Perceptual Evaluation of Speech Quality (PESQ) values and low buffering delay than the reference algorithm.