A capacity analysis for the IEEE 802.11 MAC protocol
Wireless Networks
Non-saturation and saturation analysis of IEEE 802.11e EDCA with starvation prediction
MSWiM '05 Proceedings of the 8th ACM international symposium on Modeling, analysis and simulation of wireless and mobile systems
Adaptive transmission opportunity with admission control for IEEE 802.11e networks
MSWiM '05 Proceedings of the 8th ACM international symposium on Modeling, analysis and simulation of wireless and mobile systems
Comprehensive analytical models to evaluate the TCP performance in 802.11 WLANs
WWIC'06 Proceedings of the 4th international conference on Wired/Wireless Internet Communications
A delay monitoring method for up-link flows in IEEE 802.11e EDCA networks
Proceedings of the 2nd International Conference on Simulation Tools and Techniques
EUNICE'07 Proceedings of the 13th open European summer school and IFIP TC6.6 conference on Dependable and adaptable networks and services
Tuning the EDCA parameters in WLANs with heterogeneous traffic: A flow-level analysis
Computer Networks: The International Journal of Computer and Telecommunications Networking
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VoIP service over WLAN networks is a promising alternative to provide mobile voice communications to compete with cellular systems. However, several performance problems appear due to i) heavy protocol overheads, ii) unfairness and asymmetry between the uplink and downlink flows and iii) the coexistence with other traffic flows. This paper addresses the performance of VoIP communications with simultaneous presence of bidirectional TCP traffic, showing how the presence of elastic flows drastically reduces the capacity of the system. To solve this limitation we propose a simple solution using an adaptive Admission and Rate Control algorithm which tunes the BEB (Binary Exponential Backoff) parameters as is defined in the IEEE 802.11e standard. The results show the improvement achieved on the overall system performance (in terms of number of simultaneous voice calls with QoS guarantees).