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Traffic Model and Bandwidth Allocation for Variable-Bit-Rate Video over ATM Networks
Souhwan Jung,Younghan Kim 한국정보과학회 1998 Journal of Electrical Engineering and Information Vol.3 No.6
A two-state Markov chain model for VBR video sources is proposed in this paper, and a number of parameters from the model are used to the application of adaptive bandwidth allocation. The model has an advantage to be used for a general arrival process. Three different schemes of estimating the "effective bandwidth" based on our traffic parameters have been presented, and the performance of these schemes are compared for both homogeneous and heterogeneous mix of traffic. Our simulation shows that the new adaptive bandwidth allocation schemes outperform the other schemes such as the static allocation or low-pass filter allocation.
Adaptive MPEG Traffic Prediction
Jung, Souhwan,Yoo, Jisang The Acoustical Society of Korea 1997 韓國音響學會誌 Vol.16 No.e3
This paper addresses traffic prediction issues on MPEG. A new adaptive traffic prediction scheme is proposed using MPEG picture characteristic that picture traffic depends on the coding mode of that picture, that is, I, P, and B mode. Our prediction scheme, which is based n picture decomposition (PD) and the cross-correlation of the different types of pictures, has better performance in predicting bursty MPEG traffic than that of the first-order autoregressive (AR) prediction scheme. Our simulation results show that the performance is further improved about 15% by utilizing the cross-correlations between pictures.
정수환(Souhwan Jung) 한국정보보호학회 2009 情報保護學會誌 Vol.19 No.3
최근 IT기술이 각종 산업에 융합된 제품군에 다양한 보안 솔루션이 탑재되면서 융합보안 산업이 차세대 고부가가치 산업으로 부상하고 있다. 이종 산업간 융합은 사용자들에게 편리함을 제공해 주지만 이와 반대로 다양한 보안적인 이슈사항을 야기 시켰다. 따라서 본고에서는 현재 부상하고 있는 차세대 융합산업에 대한 동향을 몇 가지 사례를 중심으로 분석 하였고, 또한 해당하는 융합산업 분야에서 발생하는 보안 이슈와 요구되는 보안기술을 분석하였다.