Random early detection gateways for congestion avoidance
IEEE/ACM Transactions on Networking (TON)
Modeling TCP Reno performance: a simple model and its empirical validation
IEEE/ACM Transactions on Networking (TON)
Voice over IP performance monitoring
ACM SIGCOMM Computer Communication Review
Contention-based airtime usage control in multirate IEEE 802.11 wireless LANs
IEEE/ACM Transactions on Networking (TON)
Quality of Experience-LAOS: create once, use many, use anywhere
International Journal of Learning Technology
Communication Systems
MMNS 2009 Proceedings of the 12th IFIP/IEEE International Conference on Management of Multimedia and Mobile Networks and Services: Wired-Wireless Multimedia Networks and Services Management
Industry perspectives: multimedia streaming over 802.11 links
IEEE Wireless Communications
On delay constrained CAC scheme and scheduling policy for CBR traffic in IEEE 802.11e wireless LANs
Wireless Communications & Mobile Computing
Endpoint-Based Call Admission Control and Resource Management for VoWLAN
IEEE Transactions on Mobile Computing
Transactions Letters - The Use of Metamodeling for VoIP over WiFi Capacity Evaluation
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Advances in wireless VoIP [Guest Editorial]
IEEE Communications Magazine
QoS-driven adaptive congestion control for voice over IP in multiservice wireless cellular networks
IEEE Communications Magazine
IEEE Communications Magazine
Performance analysis of the IEEE 802.11 distributed coordination function
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
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Voice over Internet Protocol (VoIP) has been widely used by many mobile consumer devices in IEEE 802.11 wireless local area networks (WLAN) due to its low cost and convenience. However, delays of all VoIP flows dramatically increase when network capacity is approached. Additionally, unfair traffic distribution between downlink and uplink flows in WLANs impacts the perceived VoIP quality. This paper proposes an intelligent bandwidth management scheme for VoIP services (iVoIP) that improves bandwidth utilization and provides fair downlink---uplink channel access. iVoIP is a cross-layer solution which includes two components: (1) iVoIP-Admission Control, which protects the quality of existing flows and increases the utilization of wireless network resources; (2) iVoIP-Fairness scheme, which balances the channel access opportunity between access point (AP) and wireless stations. iVoIP-Admission Control limits the number of VoIP flows based on an estimation of VoIP capacity. iVoIP-Fairness implements a contention window adaptation scheme at AP which uses stereotypes and considers several major quality of service parameters to balance the network access of downlink and uplink flows, respectively. Extensive simulations and real tests have been performed, demonstrating that iVoIP has both very good VoIP capacity estimation and admission control results. Additionally, iVoIP improves the downlink/uplink fairness level in terms of throughput, delay, loss, and VoIP quality.