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VoIP over WLAN 802.11b simulations for infrastructure and ad-hoc networks

Voice IP (VoIP) over wireless local area network (WLAN) is a topic of great interest in the research arena. To investigate what are the performance limitations in establishing VoIP calls over WLAN networks we performed some simulations. We show in this paper these simulation results in ad-hoc and infrastructure WLAN networks, working under ideal and real conditions. Measures and graphs of packet delay, packet jitter and lost packet rate show the performance limitations when VoIP runs over WLAN. The basic question posed was: how many VoIP calls can be established over a WLAN 802.11b network?