Analyzing the effect of client queue size on VoIP and TCP traffic over an IEEE 802.11e WLAN

Authors:
Sajib Datta;Sajal Das
Affiliations:
University of Texas at Arlington, Arlington, TX, USA;Missouri University of Science and Technology, Rolla, MO, USA
Venue:
Proceedings of the 16th ACM international conference on Modeling, analysis & simulation of wireless and mobile systems
Year:
2013

Citing 2
Cited 0

Fixed point analysis of single cell IEEE 802.11e WLANs: uniqueness and multistability

IEEE/ACM Transactions on Networking (TON)
An analytical model for capacity evaluation of VoIP on HCCA and TCP file transfers over EDCA in an IEEE 802.11e WLAN

ICDCN'06 Proceedings of the 8th international conference on Distributed Computing and Networking

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Abstract

In this paper we introduce a mathematical model to analyze the performance of Wi-Fi networks carrying voice calls and TCP controlled file downloads. We derive the voice call capacity, the TCP throughput, and the bandwidth utilization using the proposed five-dimensional Markov model. We show that there exists a correlation among the queue size of client nodes and the capacity and throughput of the network. We also demonstrate how bandwidth utilization is affected by variable packet arrival rates. The analytical results match well with the simulation results generated by Qualnet simulator. Moreover, we conduct an experimental study of the Enhanced Distributed Channel Access (EDCA) mechanism of the IEEE 802.11e standard with a real-environment testbed consisting of 1 access point and 11 laptops to further validate the analytical and simulation results.