Goodput enhancement of IEEE 802.11a wireless LAN via link adaptation
Daji Qiao,Sunghyun Choi +1 more
- Vol. 7, pp 1995-2000
TLDR
It is claimed that link adaptation, which performs both dynamic fragmentation and PHY rate selection depending on the wireless channel condition between the transmitter and receiver, is an attractive way to improve the goodput performance of an IEEE 802.11a wireless LAN.Abstract:
IEEE 802.11a is a new high-speed physical layer (PHY) defined for the 5 GHz U-NII bands as a supplement to the existing IEEE 802.11 wireless LAN (WLAN) standard. We give an overview of the IEEE 802.11a orthogonal frequency domain multiplexing (OFDM) PHY with eight different PHY rates as well as the distributed coordination function (DCF) of the IEEE 802.11 MAC, then derive the goodput performance analytically for peer-to-peer communication under the DCF. Based on the numerical results, we claim that link adaptation, which performs both dynamic fragmentation and PHY rate selection depending on the wireless channel condition between the transmitter and receiver, is an attractive way to improve the goodput performance of an IEEE 802.11a wireless LAN. Finally, we propose a system architecture to perform link adaptation.read more
Citations
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Proceedings ArticleDOI
IEEE 802.11 rate adaptation: a practical approach
TL;DR: An Adaptive ARF (AARF) algorithm for low latency systems that improves upon ARF to provide both short-term and long-term adaptation and a new rate adaptation algorithm designed for high latency Systems that has been implemented and evaluated on an AR5212-based device.
Journal ArticleDOI
Goodput analysis and link adaptation for IEEE 802.11a wireless LANs
TL;DR: In-depth simulation shows that the proposed MPDU-based link adaptation scheme outperforms the single-mode schemes and the autorate fallback (ARF) scheme-which is used in Lucent Technologies' WaveLAN-II networking devices-significantly in terms of the average goodput, the frame drop rate, and the average number of transmission attempts per data frame delivery.
Proceedings ArticleDOI
CARA: Collision-Aware Rate Adaptation for IEEE 802.11 WLANs
TL;DR: This paper proposes a novel rate-adaptation scheme, called CARA (Collision-Aware Rate Adaptation), which combines adaptively the Request-to-Send/Clear- to-Send (RTS/CTS) exchange with the Clear Channel Assessment (CCA) functionality to differentiate frame collisions from frame transmission failures caused by channel errors.
Proceedings ArticleDOI
Link adaptation strategy for IEEE 802.11 WLAN via received signal strength measurement
Jd.P. Pavon,Sunghyun Choi +1 more
TL;DR: A novel link adaptation algorithm is presented, which aims to improve the system throughput by adapting the transmission rate to the current link condition and it is shown that the proposed algorithm closely approximates the ideal case with the perfect knowledge about the channel and receiver conditions.
Proceedings ArticleDOI
Computationally efficient scheduling with the physical interference model for throughput improvement in wireless mesh networks
TL;DR: This paper presents a computationally efficient heuristic for computing a feasible schedule under the physical interference model and proves, under uniform random node distribution, an approximation factor for the length of this schedule relative to the shortest schedule possible with physical interference.
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