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IEEE 802.11在MAC层采用DCF作为主要的信道接入方式。本文分析了现有的几种802.11网络分析模型,其中B ianch i模型很好的描述了饱和状态下802.11 DCF的性能;X iao模型针对802.11e进行了多优先级的扩展,实现了EDCF的性能分析。最后介绍了一种新的分析模型,新模型同时考虑了业务优先级和内部调度算法,够较准确地描述网络性能。
IEEE 802.11 uses DCF as the primary channel access method at the MAC layer. This paper analyzes several existing 802.11 network analysis models, in which the Bianch i model well describes the performance of 802.11 DCF in saturated state; Xao model performs multi-priority extension to 802.11e to achieve the performance of EDCF analysis. Finally, a new analytical model is introduced. The new model considers both business priorities and internal scheduling algorithms to describe the network performance more accurately.