An analytical model for capacity evaluation of VoIP on HCCA and TCP file transfers over EDCA in an IEEE 802.11e WLAN

Authors:
Sri Harsha;S. V. R. Anand;Anurag Kumar;Vinod Sharma
Affiliations:
Department of Electrical Communication Engineering, Indian Institute of Science, Bangalore;Department of Electrical Communication Engineering, Indian Institute of Science, Bangalore;Department of Electrical Communication Engineering, Indian Institute of Science, Bangalore;Department of Electrical Communication Engineering, Indian Institute of Science, Bangalore
Venue:
ICDCN'06 Proceedings of the 8th international conference on Distributed Computing and Networking
Year:
2006

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Abstract

In the context of the IEEE 802.11e standard for WLANs, we provide an analytical model for obtaining the maximum number of VoIP calls that can be supported on HCCA, such that the delay QoS constraint of the accepted calls is met, when TCP downloads are coexistent on EDCA. In this scenario, we derive the TCP download throughput by using an analytical model for the case where only TCP sessions are present in the WLAN. We show that the analytical model for combined voice and TCP transfers provides accurate results in comparison with simulations (using ns-2).