A comparison of mechanisms for improving TCP performance over wireless links
IEEE/ACM Transactions on Networking (TON)
Modeling TCP throughput: a simple model and its empirical validation
Proceedings of the ACM SIGCOMM '98 conference on Applications, technologies, architectures, and protocols for computer communication
A wireless fair service algorithm for packet cellular networks
MobiCom '98 Proceedings of the 4th annual ACM/IEEE international conference on Mobile computing and networking
Analysis of a local-area wireless network
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Distributed fair scheduling in a wireless LAN
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Ethernet: distributed packet switching for local computer networks
Communications of the ACM
A rate-adaptive MAC protocol for multi-Hop wireless networks
Proceedings of the 7th annual international conference on Mobile computing and networking
Characterizing user behavior and network performance in a public wireless LAN
SIGMETRICS '02 Proceedings of the 2002 ACM SIGMETRICS international conference on Measurement and modeling of computer systems
Analysis of a campus-wide wireless network
Proceedings of the 8th annual international conference on Mobile computing and networking
Throughput capacity of random ad hoc networks with infrastructure support
Proceedings of the 9th annual international conference on Mobile computing and networking
Improving protocol capacity with model-based frame scheduling in IEEE 802.11-operated WLANs
Proceedings of the 9th annual international conference on Mobile computing and networking
Link-level measurements from an 802.11b mesh network
Proceedings of the 2004 conference on Applications, technologies, architectures, and protocols for computer communications
Sniffing Out the Correct Physical Layer Capture Model in 802.11b
ICNP '04 Proceedings of the 12th IEEE International Conference on Network Protocols
TCP in wired-cum-wireless environments
IEEE Communications Surveys & Tutorials
The capacity of wireless networks
IEEE Transactions on Information Theory
TCP performance issues over wireless links
IEEE Communications Magazine
Computer Networks: The International Journal of Computer and Telecommunications Networking
Cross-layer analysis and design for multimedia services in IEEE 802.11 WLANs
Mobility '08 Proceedings of the International Conference on Mobile Technology, Applications, and Systems
TCP performance optimization in multi-cell wireless local area networks
Proceedings of the 12th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems
Average-value analysis of 802.11 WLANs with persistent TCP flows
IEEE Communications Letters
Analytical Study of TCP Performance over IEEE 802.11e WLANs
Mobile Networks and Applications
Performance of different TCP variants in IEEE 802.11 WLAN and the TCP-WOW algorithm
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
TCP performance optimization in multi-cell WLANs
Performance Evaluation
Physical layer capture aware MAC for WLANs
Wireless Networks
Performance analysis of IEEE 802.11 WLANs with rate adaptation in time-varying fading channels
Computer Networks: The International Journal of Computer and Telecommunications Networking
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Widespread deployment of infrastructure WLANs has made Wi-Fi an integral part of today's Internet access technology. Despite its crucial role in affecting end-to-end performance, past research has focused on MAC protocol enhancement, analysis, and simulation-based performance evaluation without sufficient consideration for modeling inaccuracies stemming from interlayer dependencies, including physical layer diversity, that significantly impact performance. We take a fresh look at IEEE 802.11 WLANs and using experiment, simulation, and analysis demonstrate its surprisingly agile performance traits. Our findings are two-fold. First, contention-based MAC throughput degrades gracefully under congested conditions, enabled by physical layer channel diversity that reduces the effective level of MAC contention. In contrast, fairness degrades and jitter increases significantly at a critical offered load. This duality obviates the need for link layer flow control for throughput improvement. Second, TCP-over-WLAN achieves high throughput commensurate with that of wireline TCP under saturated conditions, challenging the widely held perception that TCP throughput fares poorly over WLANs when subject to heavy contention. We show that TCP-over-WLAN prowess is facilitated by the self-regulating actions of DCF and TCP feedback control that jointly drive the shared channel at an effective load of two to three wireless stations, even when the number of active stations is large. We show that the mitigating influence of TCP extends to unfairness and adverse impact of dynamic rate shifting under multiple access contention. We use experimentation and simulation in a complementary fashion, pointing out performance characteristics where they agree and differ.