ATM/TDMA의 전송에서 부분타임스탬프 방식의 셀 지연변이 보상해석

In order to economically achieve the rapid deployment of B-ISDN services which enable a variety of multimedia data processing in a short time, terrestrial/satellite-mixed network is being combined with terrestrial ATM network based on optical cable and satellite network which covers a widespread service range. This dissertation analyzes and investigates several previously existent CDV compensation methods in order to compensate CDV arising from interfacing satellite TDMA and ATM. Specifically to supplement the problems of timestamp and cell number counting methods, new Partial Timestamp method for CDV compensation is proposed. For timestamp optimization, the optimal timestamp condition that minimizes CDV, cell delay variation distribution length, is derived by making the use of the sum of the secondary moment. To evaluate the mechanism, Markov Modulated Poisson Process, which can express VBR service very well, is selected as a cell input traffic model of terrestrial transmitting earth station. After several simulation, it is confirmed that, when ut i 1 izing the proposed mechanism, CDV compensation capability for CBR services is the same as the other mechanism. It is also confirmed that CDV compensation capability for VBR services is very superior to the cell number count ing method. In this case, as the timestamp number Nts increases, CDV compensation capability increases, and the CDV distribution length is reduced.