MACAW: a media access protocol for wireless LAN's
SIGCOMM '94 Proceedings of the conference on Communications architectures, protocols and applications
Balanced media access methods for wireless networks
MobiCom '98 Proceedings of the 4th annual ACM/IEEE international conference on Mobile computing and networking
An analysis of short-term fairness in wireless media access protocols (poster session)
Proceedings of the 2000 ACM SIGMETRICS international conference on Measurement and modeling of computer systems
Achieving MAC layer fairness in wireless packet networks
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
The IEEE 802.11 Handbook: A Designer's Companion
The IEEE 802.11 Handbook: A Designer's Companion
IEEE 802.11 Wireless Local Area Networks
IEEE Communications Magazine
Performance analysis of the IEEE 802.11 distributed coordination function
IEEE Journal on Selected Areas in Communications
Contention in multi-hop wireless networks: model and fairness analysis
Proceedings of the 12th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems
Using P2P overlays to provide QOS in service-oriented wireless networks
IEEE Wireless Communications
The effect of contention in CSMA networks: Model and fairness protocol
Performance Evaluation
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IEEE 802.11 is currently the most deployed wireless local area networking standard. It uses carrier sense multiple access with collision avoidance (CSMA/CA) to resolve contention between nodes. Contention windows (CW) change dynamically to adapt to the contention level: Upon each collision, a node doubles its CW to reduce further collision risks. Upon a successful transmission, the CW is reset, assuming that the contention level has dropped. However, the contention level is more likely to change slowly, and resetting the CW causes new collisions and retransmissions before the CW reaches the optimal value again. This wastes bandwidth and increases delays. In this paper we analyze simple slow CW decrease functions and compare their performances to the legacy standard. We use simulations and mathematical modeling to show their considerable improvements at all contention levels and transient phases, especially in highly congested environments.