Admission control in the IEEE 802.11e WLANs based on analytical modelling and game theory
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Experiences of VoIP traffic monitoring in a commercial ISP
International Journal of Network Management
Multimedia applications over metropolitan area networks (MANs)
Journal of Network and Computer Applications
Impact of VoIP codecs on the energy consumption of portable devices
Proceedings of the 6th ACM workshop on Performance monitoring and measurement of heterogeneous wireless and wired networks
Voice call capacity analysis of long range WiFi as a femto backhaul solution
Computer Networks: The International Journal of Computer and Telecommunications Networking
An optimized QoS scheme for IMS-NEMO in heterogeneous networks
International Journal of Communication Systems
Proceedings of the 7th ACM workshop on Performance monitoring and measurement of heterogeneous wireless and wired networks
Review: A comprehensive survey on scheduler for VoIP over WLAN
Journal of Network and Computer Applications
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We measured the capacity for VoIP traffic in an IEEE 802.11b wireless testbed and compared it with the theoretical capacity and our simulation results. We identified factors that have been commonly overlooked in past studies but affect experiments and simulations. We found that in many papers, the capacity for VoIP traffic has been measured via simulations or experiments without considering these factors, showing different capacity in each paper. After these corrections, simulations and experiments yielded a capacity estimate of 15 calls for 64 kb/s CBR VoIP traffic with 20 ms packetization interval and 38 calls for VBR VoIP traffic with a 0.39 activity ratio. Furthermore, we measured the capacity for VoIP traffic using each access category introduced in the 802.11e standard and the effect of the TCP traffic on VoIP traffic. We found that while the 802.11e standard can protect the QoS of VoIP against TCP traffic, it does not improve the capacity due to the significant retransmissions during TXOP.