Performance analysis of IEEE 802.11 MAC protocols in wireless LANs: Research Articles
Wireless Communications & Mobile Computing - Special Issue: Emerging WLAN Apllications and Technologies
Modeling the 802.11 distributed coordination function in nonsaturated heterogeneous conditions
IEEE/ACM Transactions on Networking (TON)
An autonomous distributed admission control scheme for IEEE 802.11 DCF
The Fourth International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness & Workshops
Providing statistical QoS guarantee for voice over IP in the IEEE 802.11 wireless LANs
IEEE Wireless Communications
IEEE Transactions on Wireless Communications
Contention window optimization for ieee 802.11 DCF access control
IEEE Transactions on Wireless Communications - Part 1
Evaluation of distributed admission control for the IEEE 802.11e EDCA
IEEE Communications Magazine
Performance analysis of the IEEE 802.11 distributed coordination function
IEEE Journal on Selected Areas in Communications
Admission control in IEEE 802.11e wireless LANs
IEEE Network: The Magazine of Global Internetworking
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We propose a cross-layer approach for supporting the quality of service (QoS) of bidirectional real-time applications in IEEE802.11 DCF WLANs. In the proposal, the class-based queueing with the priority queue (PQ) scheduler is exploited in network layer at the access point (AP), and real-time applications are given the highest priority. In order to regulate the best effort traffic sent from wireless stations, we apply the MAC-frame Receive Opportunity Control (ROC), in which the AP intentionally does not return the ACK frame with a given probability when receiving a data frame of best effort traffic from a wireless station. By the intentional failure in acknowledging the receipt of frames, the ROC can control the packet sending rate on a per-station basis. The class-based queueing in network layer and the ROC in MAC layer are jointly utilized with the TCP window control in transport layer to provide the QoS guarantee for bidirectional real-time applications. The proposed cross-layer approach requires only the upgrade of the hardware (or software) of the AP, which is an important advantage over existing proposals on the QoS support in WLANs. The extensive simulation experiments reveal that, when best-effort TCP flows compete with voice conversations (VCs) in a WLAN, the proposed cross-layer approach provides better QoS to VCs than IEEE802.11e and, when best-effort UDP flows compete with VCs, the proposed approach and IEEE802.11e provides the same level of QoS to VCs.