The 802.11g 11 Mb/s Rate is More Robust than 6 Mb/s

Huang, Kaidi; Malone, David; Duffy, Ken R.

doi:10.1109/twc.2011.030311.100402

Cited by 14 publications

(9 citation statements)

References 22 publications

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“…For the Rician channel, only the 9 Mb/s rate appears redundant. Plots for the AWGN channel can be found elsewhere [8][9] [24] and mimic those shown here for Rician fading. Consequently, all of these channel models suggest redundancy of the 9 Mb/s rate.…”

Section: A Rate-set Characteristicsmentioning

confidence: 83%

“…This scheme has proven resistent to analytic study so that no theoretical framework for their performance analysis currently exists. Using pseudotheory with manufacturer-fit curves and detailed experiments, elsewhere we have shown that the 11 Mb/s rate in 802.11g is more robust that the 6 Mb/s rate [24].…”

Section: A Rate-set Characteristicsmentioning

confidence: 96%

“…It supports several physical layer transmission rates, with 802.11b having four (1, 2, 5.5 and 11 Mb/s), 802.11a having eight (6,9,12,18,24,36,48 and 54 Mb/s), while 802.11g has all twelve of the 802.11b and 802.11a rates, and 802.11n has eight when using two streams at 20 Mhz and a guard interval of 800ns (13,26,39,52,78,104,117, 130 Mb/s). A range of rates are available as their modulation and coding schemes give them distinct robustness characteristics to noise on the medium.…”

Section: Introductionmentioning

confidence: 99%

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H-RCA: 802.11 Collision-Aware Rate Control

Huang

Duffy

Malone

2013

IEEE/ACM Trans. Networking

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Abstract-Rate control methodologies that are currently available in 802.11 network cards seriously under-utilize network resources and, in addition, per-second throughputs suffer from high variability. In this article we introduce an algorithm, H-RCA, that overcomes these shortcomings, giving substantially higher, and less variable, throughput. The approach solely uses information already available at the driver-level to function and can be implemented on 802.11e commodity hardware.H-RCA's design objective is to minimize the average time each packet spends on the medium (including retries) in order to maximize total network throughput. It uses a development of a recently proposed estimation scheme to distinguish transmission failures due to collisions from those caused by channel noise. It employs an estimate of the packet loss ratio due to noise in assessing whether it is appropriate to change rate. We demonstrate experimentally that packet loss ratio is not necessarily a monotonic increasing function of rate; this is accounted for in H-RCA's design.As H-RCA statistically separates noise losses from those caused by collisions, ns-2 simulations show that it is robust to changing environments. H-RCA does not require specific hardware support nor any change to the IEEE 802.11 protocol. This point is substantiated with results from an experimental implementation.

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Section: A Rate-set Characteristicsmentioning

confidence: 83%

Section: A Rate-set Characteristicsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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H-RCA: 802.11 Collision-Aware Rate Control

Huang

Duffy

Malone

2013

IEEE/ACM Trans. Networking

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“…7(a)). We suspect it is because 802.11n is more vulnerable to interference than 802.11a, just like how 802.11g could be less robust against interference than 802.11b [9]. When C 1 's ACK power was reduced, C 2 's throughput greatly improved regardless of C 2 's ACK power level.…”

Section: Impact Of Mac Ack Interferencementioning

confidence: 99%

Uncovering a Hidden wireless menace: Interference from 802.11x MAC acknowledgment frames

Wang

Leong

et al. 2014

2014 Eleventh Annual IEEE International Conference on Sensing, Communication, and Networking (SECON)

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Abstract-Previous work on 802.11x (Wi-Fi) power control have focused almost exclusively on the mitigation of interference from data frames. Since Wi-Fi wireless access points are increasingly ubiquitous, it is now common for an 802.11x client to be able to receive signals from more than 10 APs simultaneously in a modern urban operating environment. At such high densities, we found that the interference from the MAC acknowledgment (ACK) frames can potentially reduce throughput by several fold. We show that by dynamically adjusting the transmission power of the ACK frames, a simple ACK power control algorithm, which we call MinPACK, can significantly mitigate interference and increase throughput by a median of 31%, while simultaneously improving fairness. MinPACK is complementary to existing data frames power control algorithms, and adapts rapidly to dynamic environments.

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“…Some of these results have been published in [67]. Section 5.2 describes the theoretical analysis of IEEE 802.11a/g rates.…”

Section: Introductionmentioning

confidence: 99%

Wireless Local Area Networks

Mobile Telecommunications Protocols for Data Networks

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The 802.11g 11 Mb/s Rate is More Robust than 6 Mb/s

Cited by 14 publications

References 22 publications

H-RCA: 802.11 Collision-Aware Rate Control

H-RCA: 802.11 Collision-Aware Rate Control

Uncovering a Hidden wireless menace: Interference from 802.11x MAC acknowledgment frames

Wireless Local Area Networks

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