Effective Bandwidth Utilization in IEEE802.11 for VOIP

Comparison of QoS Guarantee Techniques for VoIP over IEEE802.11 Wireless LAN

An emerging killer application for enterprise wireless LANs (WLANs) is voice over IP (VoIP) telephony, which promises to greatly improve the reachability and mobility of enterprise telephony service at low cost. None of the commercial IEEE 802.11 WLAN-based VoIP products can support more than ten G.729-quality voice conversations over a single IEEE 802.11b channel on real-world WLANs, even thou...

iVoIP: an intelligent bandwidth management scheme for VoIP in WLANs

Voice over Internet Protocol (VoIP) has been widely used by many mobile consumer devices in IEEE 802.11 wireless local area networks (WLAN) due to its low cost and convenience. However, delays of all VoIP flows dramatically increase when network capacity is approached. Additionally, unfair traffic distribution between downlink and uplink flows in WLANs impacts the perceived VoIP quality. This p...

Supporting VoIP in IEEE802.11 distributed WLANs

A Survey of Bandwidth Optimization Techniques and Patterns in VoIP Services and Applications

As Internet Telephony unveils a communication system that allows for the conduction and reception of voice signals and data over the internet network, the volume of voice traffic and (or) packets on IP networks have grown substantially. However, a crucial problem imminent is that of inefficient bandwidth utilization which is mostly as a result of header overheads resulting from the attachment o...

A New Admission Control Metric for VoIP Traffic in 802.11 Networks

In this paper, we propose a new metric for admission control of VoIP traffic for IEEE 802.11b networks. Due to the large fixed overhead in IEEE 802.11b, the bandwidth available at the payload sizes typical for VoIP traffic is far less than the bandwidth available when using the network for data traffic. Hence, bandwidth is inappropriate as criterion whether or not a new VoIP stream or data stre...