A study of multiaccess computer communications has characterized the distributions underlying an elementary model of the user-computer interactive process. The model used is elementary in the sense that many of the random variables that generally are of interest in computer communications studies can be decomposed into the elements of this model. Data were examined from four operational multiaccess systems, and the model is shown to be robust; that is, each of the variables of the model has the same distribution independent of which of the four systems is being examined. It is shown that the gamma distribution can be used to describe each of the continuous variables of the model, and that the geometric distribution can be used to describe the discrete variables. Approximations to the gamma distribution by the exponential distribution are discussed for the systems studied.
对多址计算机通信的研究已对用户计算机交互过程的基本模型下的分布进行了表征。在某种意义上说,使用的模型是基本模型,因为计算机通信研究中通常会感兴趣的许多随机变量都可以分解为该模型的元素。从四个可操作的多路访问系统中检查了数据,并且该模型被证明是可靠的。也就是说,模型的每个变量都具有相同的分布,而与要检查的四个系统中的哪个无关。结果表明,伽马分布可用于描述模型的每个连续变量,而几何分布可用于描述离散变量。讨论了所研究系统通过指数分布逼近伽玛分布的情况。 P>
Bell Telephone Laboratories, Incorporated, Holmdel, New Jersey;
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