QShine '06 Proceedings of the 3rd international conference on Quality of service in heterogeneous wired/wireless networks
A probabilistic call admission control algorithm for WLAN in heterogeneous wireless environment
IEEE Transactions on Wireless Communications
A unified QoS-inspired load optimization framework for multiple access points based wireless LANs
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Cost-based vertical handover decision algorithm for WWAN/WLAN integrated networks
EURASIP Journal on Wireless Communications and Networking
Computer Networks: The International Journal of Computer and Telecommunications Networking
Cross-layer approach for supporting QoS in IEEE802.11 DCF wireless LANs
Proceedings of the 6th ACM workshop on QoS and security for wireless and mobile networks
Performance problems of VoIP in 802.11 wireless mesh networks & their solutions
Proceedings of the International Conference & Workshop on Emerging Trends in Technology
RTS/CTS based endpoint admission control for VoIP over 802.11e
MMNS'06 Proceedings of the 9th IFIP/IEEE international conference on Management of Multimedia and Mobile Networks and Services
The influence of interference networks in QoS parameters in a WLAN 802.11g environment
ISPA'07 Proceedings of the 5th international conference on Parallel and Distributed Processing and Applications
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Recent years have seen greatly increasing interests in voice over IP in wireless LANs, in which the IEEE 802.11 distributed coordination function protocol or enhanced DCF protocol is used. However, since both DCF and EDCF are contention-based medium access control protocols, it is difficult for them to support the strict QoS requirement for VoIP. Therefore, in this article we propose a novel call admission control scheme that runs at the MAC layer to support VoIP services. The call admission control mechanism regulates voice traffic to efficiently coordinate medium contention among voice sources. The rate control mechanism regulates non-voice traffic to control its impact on the performance of voice traffic. Extensive simulations demonstrate that the proposed schemes can well support statistical QoS guarantees for voice traffic and maintain stable high throughput for non-voice traffic at the same time.