生成 RTT 值
我正在编写一个 Java 小程序，我应该能够在其中模拟两个主机之间的连接。因此我必须随机生成数据包往返时间。
这些 RTT 可以从 ~0 到无穷大，但通常在某个平均值附近振荡（即极大或极小的值不太可能但有可能）。我想知道是否有人知道我该怎么做？
提前致谢
I'm writing a Java applet where I should be able to simulate a connection between two hosts. Hence I have to generate packet round-trip times at random.
These RTTs can go from ~0 to infinity, but are typically oscillating around some average value (i.e. an extremely large or small value is very improbable but possible). I was wondering if anyone had an idea of how I could do this?
Thanks in advance
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您必须选择一个合理的分布，从中提取（伪）随机值。 gamma 分布 可能有意义，因为它似乎满足您的要求。您还可以使用（左）截断正态分布。
Java 的 Apache Commons-Math 库包含伽马分布和正态（又名高斯）分布的代码。当使用正态分布 RNG 从截断正态分布中选取值时，只需拒绝不需要的抽签（即，当您选取 x <= 0 时，再次选取）。
You're going to have to select a reasonable disribution from which to draw (pseudo) random values. A gamma distribuition might make some sense as it seems to satisfy your requirements. You could also use a (left) truncated normal distribution.
The Apache Commons-Math library for Java has code for the gamma and normal (aka Gaussian) distributions. When using a normal distribution RNG for picking values from a truncated normal distribution, simply reject undesired draws (i.e. when you pick x <= 0, pick again).