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本文论述了用计算机模拟信息包分隙信道多址协议的一般方法。采用计算机模拟包通信,首先必须建立信道上信息包发生量的数学模型。在一个时段内用户产生的信息包数是一个离散的随机变量,对于不同的情况该随机变量有不同的分布。按照给定的分布,这一随机变量能由(0,1)均匀分布的随机变量加以变换得到。其次要正确地用计算机模拟一个协议解决冲突的规则,以便对协议的性能指标进行统计。 本文以泊松Poisson信源随机树形协议为例,详细地介绍了它的计算机模拟方法,并给出该模拟试验的数值结果。
This article discusses the general method of using a computer to simulate a packet-slotted channel multiple-access protocol. Using computer simulation of packet communications, we must first establish a mathematical model of the amount of packets on the channel. The number of packets generated by a user over a period of time is a discrete random variable that varies for different situations. According to a given distribution, this random variable can be transformed by (0,1) uniformly distributed random variables. Second, we must use the computer to simulate an agreement to resolve the conflict rules, in order to measure the performance of the agreement statistics. This paper takes Poisson Poisson source random tree protocol as an example, introduces its computer simulation method in detail, and gives the numerical results of the simulation experiment.