Distributed fair scheduling in a wireless LAN
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
A real-time medium access control protocol for ad hoc wireless local area networks
ACM SIGMOBILE Mobile Computing and Communications Review
Asynchronous Multimedia Multihop Wireless Networks
INFOCOM '97 Proceedings of the INFOCOM '97. Sixteenth Annual Joint Conference of the IEEE Computer and Communications Societies. Driving the Information Revolution
MAC Layer Protocols for Real-Time Traffic in Ad-Hoc Wireless Networks
ICPP '02 Proceedings of the 2002 International Conference on Parallel Processing
A priority MAC protocol to support real-time traffic in ad hoc networks
Wireless Networks
MSWiM '04 Proceedings of the 7th ACM international symposium on Modeling, analysis and simulation of wireless and mobile systems
PE-WASUN '04 Proceedings of the 1st ACM international workshop on Performance evaluation of wireless ad hoc, sensor, and ubiquitous networks
Wireless Communications & Mobile Computing - Special Issue: Mobility Management in Wireless and Mobile Networks
Performance analysis of priority schemes for IEEE 802.11 and IEEE 802.11e wireless LANs
IEEE Transactions on Wireless Communications
QoS issues in ad hoc wireless networks
IEEE Communications Magazine
Quality-of-service in ad hoc carrier sense multiple access wireless networks
IEEE Journal on Selected Areas in Communications
Performance analysis of the IEEE 802.11 distributed coordination function
IEEE Journal on Selected Areas in Communications
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To provide Quality of Service (QoS) at MAC layer in mobile ad hoc networks (MANETs), it requires that a real-time (or high priority) data frame gets a higher channel access priority to that of a best-effort (or low priority) data frame. In this paper, we propose a scheme for resolving MAC layer contention in the form of a strict priority based variant of the IEEE 802.11 DCF. The channel access priorities for different classes of traffic are realized by proper backoff timer selection method which assigns non-overlapping contention windows to traffic of different priorities irrespective of their backoff stage values. To avoid overlapping of backoff timers during countdown period, freezing of backoff timer in low priority is replaced with a resetting of backoff timer mechanism. Besides introducing channel access priorities at MAC layer, a priority-based queuing discipline is implemented in the interface queue to improve the intra-node QoS support. The performance enhancement of the proposed scheme is demonstrated for single hop scenarios using a Markov Chain model, and the accuracy of the model is validated through a detailed simulation study. Further, simulation results in a multihop scenario show suitability of our approach to provide a strict service differentiation, especially in terms of end-to-end delay and throughput provided to real-time traffic as compared to DCF.