Abstract: Compared with the old analytical models of EDCA，the proposed model incorporates inner station collision and TXOP of the EDCA.Based on the proposed model，the saturated throughout of different traffics in different TXOP can be estimated.Simulation result shows the proposed analytical model is more accurate.

摘要： 提出了新的饱和状态下EDCA分析模型。与原有模型相比增加了站点内部竞争冲突和传输机遇两个特性。根据提出的模型，估计了多业务在实施不同的传输机遇情况下的吞吐量性能。仿真结果显示提出的新模型比原模型更加准确。