Softspeak: Making VoIP Play Well in Existing 802.11 Deployments High Speed

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Executive Summary

Voice over IP (VoIP) in 802.11 wireless networks (WiFi) is an attractive alternative to cellular wireless telephony. Unfortunately, VoIP traffic is well known to make inefficient use of such networks. Indeed, the authors demonstrate that increasing handset deployment has the potential to cripple existing hotspot and enterprise WiFi networks. The experiments show that VoIP halves the available TCP capacity of an 802.11b hotspot when six to eight VoIP stations share the medium, and effectively extinguishes TCP connectivity when ten VoIP stations are present.

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