两级CDV容限参数的流量强制与成形算法

Traffic Enforcement and Shaping Algorithm with Two Level CDV Tolerant Parameter

信元时延变化ＣＤＶ对峰值速率警管有很大影响，文中首先提出基于通用信元速率算法ＧＣＲＡ（Ｔ，δ）的ＣＤＶ成形算法，该算法能有效地成形ＣＤＶ使之符合ＧＣＲＡ（Ｔ，δ）算法对ＣＤＶ容限的要求；在对ＣＤＶ成形算法分析的基础上，进一步提出了两级ＣＤＶ容限参数的流量强制与成形算法ＴＰ－ＥＳＡ，ＴＰ－ＥＳＡ既能成形ＣＤＶ到任意预设的值，又能防止连接对流量的恶意滥用。文中对算法的实现和操作也进行了研究。

Cell Delay Variation(CDV) has important impact on peak rate policing. This paper first presents CDV shaping algorithm based on generic cell rate algorithm, which can effectively shape CDV and make it meet the tolerant requirement of GCRA(T,δ). On the basis of analysis of this algorithm, we further propose traffic enforcement and shaping algorithm with two level CDV tolerant parameter(TP-ESA). The TP-ESA can not only shape CDV to arbitrary predetermined value but also prevent connection from malicious exceeding for traffic. The implementation and operation of TP-ESA are studied in this paper.