ATM網路中增強型漏桶式控制源在多工器內之延遲分析

• Main Authors: Sue, Shyh-Wen, 蘇世文
• Other Authors: 吳中實
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/36657177196694961105

碩士 === 國立中央大學 === 電機工程研究所 === 84 === In ATM networks, a usage parameter control (UPC) strategy has to regulate incoming traffic according to the contract which is negotiated at call set-up by user and network provider. Among various UPC schemes, the Leaky Bucket algorithm has been proposed as a policer in the rate-based management of bandwidth in ATM network and it has been discussed extensively based on its characteristics and effectiveness. In this thesis, we present an enhanced version of Leaky Bucket, we call it Enhanced Leaky Bucket (ELB), to monitor traffic. In addition to the factors of mean rate, peak rate, cell delay variation (CDV) is also taken into consideration for each ELB. Then, we study the characteristics of the multiplexer with sufficient buffer in which cell arrivals are policed by an Enhanced Leaky-Bucket (ELB) before entering the system based on the criteria of waiting time in the multiplexer buffer. Based on the two special kinds of token-generation condition, "conicident environment" and "perfectly interleaving environment" under the homogeneous environment, we derive the bounds of maximum waiting time and maximum average waiting time for cells endured in the multiplexer buffer expressed as the function of the ELB parameters and the number of sources. Then, according to this worst case analysis, we discuss the relation between the waiting time and ELB parameters. From the discussion, we discuss the problem of setting the parameters of Enhanced Leaky-Bucket and the effect of token-generation environment based on the queueing behavior of multiplexing ELB enforced sources by simulation.