随到接入流量模型用于时分接入系统的误差研究*

随到接入是多数流模型普遍采用的假定，实际通信系统中突发通常是时分接入的，这个差别对流模型精度造成多大影响常常是流模型研究中被忽视的问题，相关的论文至今为止几乎没有见到。为此就间断泊松模型（IPP）对这种误差作了研究，从数学根源上揭示了误差产生的原理，并推导出了时隙化IPP的动态均值流量与IPP模型的误差近似公式。仿真显示该理论结果与仿真值高度一致，相比IPP结果具有更高精度。

Research on traffic model error caused by inconsistence access mode with time division access system

Accepting bursts with arrival is assumed as a matter of course in many traffic models. In fact, bursts are accepted at slotted time in most communication systems. To what extent the discrepancy makes effect on the model is often an unwitnessed problem by many research of traffic model, accordingly related papers are seldom found. This paper put forword this kind of error, studiedand uncovered it from mathematicview. Further more, based on interrupt Poisson procedure (IPP) model, deduced the dynamic mean traffic expression of slotted IPP and error approximation formulation of IPP. Simulation indicatesthat the theoretic conclusion has high accordance with simulation results and has higher precision than IPP.