ITC 2004, 16th ITC Specialist Seminar on Performance Evaluation of Wireless and Mobile Networks, August 31-September 02, 2004, Antwerp, Belgium
In this paper, we study the VoIP capacity of IEEE 802.11b (DCF), i.e., the maximum number of simultaneous voice calls that can take place in a WLAN cell. This capacity is highly dependent on the chosen codec and on the distance from the access point (AP) to the users. Thus several codecs are studied, namely G711, GSM-EFR, and G723.1. All users are assumed to be at a fixed distance from the AP. The quality of voice calls is evaluated thanks to the E-model. Simulation results provide the following results: G711 allows up to 5 simultaneous calls, GSM-EFR up to 12, and G723.1 up to 18 for a voice quality greater than R = 70 and a network delay of 20ms.
Type:
Conférence
City:
Antwerp
Date:
2004-09-02
Department:
Systèmes de Communication
Eurecom Ref:
1435
Copyright:
© ITC. Personal use of this material is permitted. The definitive version of this paper was published in ITC 2004, 16th ITC Specialist Seminar on Performance Evaluation of Wireless and Mobile Networks, August 31-September 02, 2004, Antwerp, Belgium and is available at :
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