该文提出了一种将 Internet网络分组传输延时和丢失控制的区分服务要求合并在一起的综合方案 .在这个方案中 ,分组丢失控制是基于动态缓冲阈值 ( dynamic buffer threshold,简称 DBT)方案 .在 DBT方案中 ,缓冲控制阈值基于分组丢失行为而动态地变化 .在静态缓冲阈值 ( static buffer threshold,简称 SBT)方案中 ,分组丢失变化没有控制 ,丢失率变化大 .对于缓冲控制阈值的确定 ,没有简明的数学表达方式 .由于 SBT不能随着传输突发特性的变化而变化 ,从而影响网络的系统性能 .该文提出的 DBT方案不但可以克服这些问题 ,而且可以确定和控制标志分组与非标志分组丢失率之间的比例关系 .文章给出了所提出方案的随机 Petri网性能模型、不同分组级别之间的丢失比例数学公式以及此方案重要性能的模拟和分析结果 This paper presents an integrated solution that combines the differentiated service requirements of Internet network packet transmission delay and loss control.In this scheme, packet loss control is based on the dynamic buffer threshold (DBT) scheme. In the DBT scheme, the buffer control threshold dynamically changes based on the packet loss behavior.In the static buffer threshold (SBT) scheme, the packet loss change is not controlled and the loss rate varies greatly.For the determination of the buffer control threshold, There is no concise mathematical expression.Because the SBT can not change with the transmission characteristics of the burst changes, thus affecting the system performance of the network.The DBT program proposed in this paper can not only overcome these problems, but also to identify and control the flag grouping and non-marking Packet loss rate of the ratio between the paper gives the performance of the proposed model of stochastic Petri nets, different levels of packet loss ratio between the mathematical formula and the program’s important performance simulation and analysis results