VoIP Capacity Allocation Using an Adaptive Voice Packetization Server in IEEE 802.11 WLANs

WLAN VoIP capacity is known to be very low due to the effects of overheads at various protocol layers. An IEEE 802.11b access point (AP) operating at 11 Mbps for example, can support only about 12 G.711 voice connections with a 20ms packetization interval. These effects can be mitigated by taking into account the available latency margin of the call and using it in the VoIP parameter selection. In this paper we propose the use of an adaptive …