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ATM 망에서 신경망을 이용한 효율적인 트래픽 제어에 관한 연구
서동신(Dong-shin Seo),석경휴(Kyung-Hyu Suk),김광준(Kwang-jun Kim),박종선(Chong-sun Park),나상동(Sang-Dong Na) 한국정보과학회 1996 한국정보과학회 학술발표논문집 Vol.23 No.1A
본 논문은 ATM 통신망에서 신경망을 이용해 트래픽을 제어하며 적응 링크 용량으로부터 호 손실율을 평가한다. 신경망에 의한 제어는 병렬 처리에 의해 최적 링크 용량을 빠르게 찾아 내어 호 수락 제어시 트래픽 변화에 적응시키며, 적응적 ATM 트래픽 제어시 추정된 호 손실율에 따라 다양한 트래픽 특성을 갖는 효율적인 트래픽 제어 알고리즘을 제안한다. 제공된 트래픽에 따른 컴퓨터 시뮬레이션 결과에서 일정시간 학습되는 과정에서 10^(-6) 호 손실률을 얻었으며, 신경망에 의한 호 손실을 추적은 적응적 링크 용량 제어가 비적응적 링크 용량 제어보다 트래픽 제어에 성능이 좋음을 보인다.
신경망을 이용한 ATM 망에서 트래픽 제어에 관한 연구
서동신,김희철,임방택,나상동 조선대학교 동력자원연구소 1996 動力資源硏究所誌 Vol.18 No.1
A traffic control using back-propagation neural networks propose for the ATM communications networks. This paper proposes adaptive call admission control using back-propagation algorithm in link capacity control. In this paper, back-propagation algorithm is trained to estimate call admission rate from traffic load and link capacity, and link capacity assignment is optimized by back-propagation algorithm method which used learning rate and moment term. Therefore, simulation results yield efficient ATM traffic control which use neural networks training between quality of service(QOS) and traffic parameter in the number of class 1, 2 and evaluate call loss rate 10exp(-6) using the Erlang-Bequation by trained back-propagation neural networks.
서동신 金烏工科大學校 1991 論文集 Vol.12 No.-
Input signals encountered by DSP are continuous and must first be digitized. Since the hardware complexity of DSP systems is directly related to the digital wordlength, it is important to limit the number of bits in the various processing elements of the system. This thesis is focused on the systems that are linear with respect to the field of real number from 4bits to 2bits which have been used in error-correcting codes, in multiple address coding, counting, fault detection, synchronization, in noise signal processing, in radar or sonar systems and spread-spectrum communications such that two digit length digital filter is studied for its maximum availability to digital application systems.
尹東漢,金炳哲,徐東信 金烏工科大學校 1982 論文集 Vol.3 No.-
In this paper, we considered the wsy to realize the magic T from the Balun, The Unbalanced line of the Balun can be developed to the E arm of the Magic T and the Balanced line can modified to the H arm of the Magic T. And, for the impedance matching, we insert the two section ?? Chebyshev transformer at the H arm of the Magic T.
Adaptive Delta Modulation 에 대한 Hybrid Companding 에 관한 연구
서동신 金烏工科大學校 1982 論文集 Vol.3 No.-
Computer simulation for the comparison with the Hbqrid Companding and other ways when the variance of amplitude as an input is high, shows the results here that for the responses on high amplitude variance, hybrid companding is much superior to the instantaneous companding, the ratio αtends to arise great influence, and improved about 2.7 dB of the response on the input with gaussian distribution increasing the noise at the high step size.
신경회로망을 이용한 ATM에서 실시간 호 제어에 관한 연구
서동신,김희철,나상동 조선대학교 생산기술연구소 1996 生産技術硏究 Vol.18 No.2
A traffic control using the neuaral network (NN) algorithm is proposed for the ATM communication networks. In this paper, neuaral network algorithm is trained to estimate call admission rate from traffic load and link capacity, and link capacity assignment is optimized by advanced NN algorithm method which used learning rate and moment term. In the real-time call control, link capacity assignment of NN methed is compared to equivalent bandwidth(EB) method. Therefore. simulation results yield efficient ATM traffic control which is used neural networks training between quality of service and traffic parameter in the number of traffic type 1, 2. We Show that call reject rate by neural network algorithm using the NN methed is presented better than EB method in the training pattern.
권상근,서동신 金烏工科大學校 1992 論文集 Vol.13 No.-
본 논문에서는 2-channel PR FIR QMF banks와 웨이브렛 기저 사이의 관계에 대하여 설명하였다. 웨이브렛 기저는 PR FIR QMF 뱅크의 모든 성질을 가지고 있을 뿐 아니라 regularity 조건도 가지고 있다. 그러므로 웨이브렛의 조건과 기존의 PR FIR QMF뱅크를 설계하기 위하여 사용되는 2-component polyphase decomposition 방법을 이용하면 기존의 방법과 다른 방법으로 여파기를 설계하는 것이 가능하다. 이렇게 설계된 여파기들은 PR 조건을 만족할 뿐아니라 compactly supported한 직교 여파기 뱅크가 된다. In this paper, we compared the conditions exciting between PR FIR QMF banks and wavelet bases. The wavelet bases include the all the conditions of PR FIR QMF banks and regularity condition is added. The PR FIR QMF banks could be designed by using the wavelet conditions and 2-component polyphase decomposition which is employed in classical PR FIR QMF banks.