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本文分析了IEEE802.11中DCF、PCF和IEEE802.11e中的EDCF、HCF四种接入机制。研究了这四种机制对实时业务的QoS支持能力。通过NS-2软件仿真得出,相比于802.11中的DCF、PCF,802.11e中的EDCF、HCF机制提高了实时业务的QoS。对当前WLAN网络中实时业务的传输有着重要的指导意义。
This paper analyzes four IEEE802.11 DCF, PCF and IEEE802.11e EDCF, HCF four access mechanisms. The four mechanisms for real-time business QoS support capabilities. Through the simulation of NS-2 software, the HCF mechanism improves the QoS of real-time services compared to the DCF in 802.11, PCF, EDCF in 802.11e. It has important guiding significance for the transmission of real-time services in the current WLAN network.