A rate-adaptive MAC protocol for multi-Hop wireless networks
Proceedings of the 7th annual international conference on Mobile computing and networking
IEEE 802.11 rate adaptation: a practical approach
MSWiM '04 Proceedings of the 7th ACM international symposium on Modeling, analysis and simulation of wireless and mobile systems
Routing in multi-radio, multi-hop wireless mesh networks
Proceedings of the 10th annual international conference on Mobile computing and networking
Hybrid rate control for IEEE 802.11
Proceedings of the second international workshop on Mobility management & wireless access protocols
Idle sense: an optimal access method for high throughput and fairness in rate diverse wireless LANs
Proceedings of the 2005 conference on Applications, technologies, architectures, and protocols for computer communications
Robust rate adaptation for 802.11 wireless networks
Proceedings of the 12th annual international conference on Mobile computing and networking
Novel collision detection scheme and its applications for IEEE 802.11 wireless LANs
Computer Communications
An experimental study on the capture effect in 802.11a networks
Proceedings of the second ACM international workshop on Wireless network testbeds, experimental evaluation and characterization
A cross layer rate adaptation solution for IEEE 802.11 networks
Computer Communications
Cross-layer wireless bit rate adaptation
Proceedings of the ACM SIGCOMM 2009 conference on Data communication
Automatic elimination of unnecessary packets for smart terminals in Wireless LAN environments
Journal of Systems Architecture: the EUROMICRO Journal
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IEEE 802.11-based devices employ rate adaptation algorithms to dynamically switch data rates to accommodate the fluctuating wireless channel conditions. Many studies observed that when there are other stations transmitting in the network, existing rate adaptation performance degrades significantly due to its inability to differentiate losses between wireless noise and contention collisions. In this paper, we first conduct a systematic evaluation on the effectiveness of various rate adaptation protocols, which try to address this issue by exploiting optional RTS frames to isolate the wireless losses from collision losses. We observe that these existing schemes do not perform well in many background traffic scenarios and can mislead the rate adaptation algorithms to persist on using similar data rate combinations regardless of background traffic level, thus resulting in performance penalty in certain scenarios. The fundamental challenge is to dynamically adjust the rate selection decision objectives with respect to different background traffic levels, as well as fluctuating wireless conditions. In light of such observations, we design a new Background traffic-aWAre RatE adaptation algorithm (BEWARE) that addresses the above challenge. BEWARE uses a mathematical model to calculate on the fly the expected packet transmission time based on current wireless channel and background traffic conditions. We implement BEWARE design in a Linux-based driver, and the test-bed experiment results show that BEWARE outperforms other rate adaptation algorithms by up to 250% in various indoor and outdoor scenarios.