Queueing analysis and delay mitigation in the access point of VoWLAN
Quan Wan, Ming Hui Du · 2006
VoIP over WLAN (VoWLAN) has become increasingly popular as a medium to connect portable devices to the next generation network (NGN). Since voice packet is extremely delay sensitive, it is important to characterize the multimedia packets delay incurred in a VoWLAN. In this paper we analyze the multimedia packets access delay incurred in the access point (AP) based on a prioritized M/G/1 analysis model, which is more accurate than the classical single Poisson-based model to calculate the mean multimedia access delay incurred in AP. Then we develop an improved point coordination function (PCF) polling-scheduling algorithm for improving the WLAN's multimedia traffic application by reducing the access delay. Finally, simulation results based on OPNET are presented to show the effect of this method on WLAN's multimedia traffic application like VoIP, etc.