非同步傳輸模式網路中的使用參數控制

Abstract

在本論文中,主要提出了一種新的參數控制機制:``EWMA-II''。它彌補了 漏桶 (Leaky Bucket; LB) 用者不佳的監測能力。EWMA-II 機制的主要功 能 均叢聚長度。同時,若使用者因平均叢聚長度增加導致平均封包率上升 時,EWMA-II 機制亦將會獲得一個較 LB甈陛C它的效能分析我們將從數值 方法及計算機模擬兩方面來探討。 EWMA-IID常簡單,因此若EWMA-II 機 制與兩級的 LB責最大封包率的監測,另一級負責 □,我們將可獲得一個完 整的參數控制機制的架構,足以監測任何語音封包的使用者。 □探討了預 支型參數控制機制的效能,包括``預支型滑動視窗機制'' 窗機制''及``保 留-預支型跳躍視窗機制''。同時我們亦探討了非法使用 的變化種類,並 逐一對LB機制及指數加權移動平均(Exponentially Average; EWMA) 機制 做測試,最後我們對Turner 先生[15]所提出的 W寬配置法則及使用參數控 制做了修改,使其更符合實際系統的執行。 In this thesis we propose a new policing mechanism called EWMA- II compensates the policing capability of Leaky Bucket scheme topliant sources for which the peak rate and mean rate are compliant whilelength is over contract. The main feature of EWMA-II is to police the of a source. Also, when the mean rate of a non-compliant source increases due to the increase of its mean the EWMA-II policing scheme can achieve a very good static behavior and a fast dynamic behavior. The performance of EWMA-II mechanism is studied by numerical simulation results. The hardware implementation of EWMA-II is Hence, if EWMA-II is cascaded with two stages of Leaky Bucket (one policing peak rate, the other policing mean rate), we any type of non- compliant on-off sources to prevent network In the rest of this thesis, we study some other new policing including ``Preuse Moving Window''(PMW)、``Preuse Jumpingnd ``Reserve Preuse Jumping Window''(RPJW). Also we classify the non-compliant sources, and test the performance of LB and EWMA by these sources to both mechanisms. Finally, we modify theation algorithm and usage parameter control mechanism for data packets Turner[15] to make it practical for real systems.