Analysis and improvement of the Qos delay performance in VoWLAN
VoWLAN中QoS延迟性能分析与改进

VoIP over Wireless LAN(VoWLAN) has become increasingly popular as a medium to connect portable devices to the network.Since voice packets are extremely delay sensitive,it is important to characterize the delay properties occur in a VoWLAN network.The multimedia packets access delay incurred was analyzed in the Access Point(AP) based on a prioritized M/G/1 analysis model,which was more accurate than the classical single Poisson-based model to calculate the mean multimedia packets access delay incurred in AP.Then an improved Point Coordination Function(PCF) polling-scheduling algorithm was developed for improving the WLAN's multimedia traffic application by reducing the access delay.Finally,simulation results based on OPNET were presented to show the effect of this method on WLAN's multimedia traffic application like VoIP,etc.