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An analytical paradigm to compare routing strategies in an ATM multimedia environment

机译:在ATM多媒体环境中比较路由策略的分析范式

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We propose an analytical model for the study of two different routing strategies in an ATM network supporting multimedia traffic flow: the multimedia virtual circuit (MVC) and the independent virtual circuit (IVC). The first strategy consists of assigning a single virtual channel to all of the monomedia streams which make up the multimedia flows; the second strategy consists of multiplexing homogeneous monomedia streams belonging to different multimedia sources on the same virtual channel. With this aim, a multimedia source is modeled as an arrival process defined as the superposition of heterogeneous correlated arrival processes, each of which models one monomedia source. In order to take into account the intermedia relationships which exist in a multimedia stream, each monomedia source is modeled as an interrupted Bernoulli process in which the transition and the arrival probabilities are functions of the states of the other monomedia sources. A finite-buffer discrete-time approach is used in order to compare MVC and IVC performance when an aggregate of N heterogeneous multimedia sources loads the network. Performance is evaluated for each monomedia source in terms of loss probability and jitter probability density function. To assess the proposed paradigm, a case study is shown.
机译:我们提出了一种用于研究支持多媒体业务流的ATM网络中两种不同路由策略的分析模型:多媒体虚拟电路(MVC)和独立虚拟电路(IVC)。第一种策略是为构成多媒体流的所有单多媒体流分配一个虚拟通道;第二种策略是在同一虚拟通道上复用属于不同多媒体源的同质单多媒体流。为了这个目的,将多媒体源建模为到达过程,该到达过程定义为异构相关到达过程的叠加,每个模型都模拟一个单媒体源。为了考虑多媒体流中存在的中间媒介关系,将每个单一媒介源建模为中断的伯努利过程,其中转移和到达概率是其他单一媒介源的状态的函数。当N个异构多媒体源的集合加载网络时,为了比较MVC和IVC性能,使用了有限缓冲区离散时间方法。根据损耗概率和抖动概率密度函数评估每个单媒体源的性能。为了评估提议的范例,将显示一个案例研究。

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