On the performance of IEEE 802.11n protocol

Hajlaoui, Nasreddine; Jabri, Issam

doi:10.1109/wmnc.2012.6416145

Cited by 12 publications

(14 citation statements)

References 11 publications

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“…With standards such as 802.11ac promising speeds up to 800 Mbps per user using multi-user MIMO, it is theoretically possible to serve video streams to hundreds of users. However, recent studies [5], [6] throw cold water on this promise. Large number of neighboring APs lead to hidden terminal problems and this, coupled with increased interference sensitivity stemming from channel bonding, makes the entire solution interference limited.…”

Section: A Limitations Of Existing Solutionsmentioning

confidence: 99%

“…Large number of neighboring APs lead to hidden terminal problems and this, coupled with increased interference sensitivity stemming from channel bonding, makes the entire solution interference limited. Extrapolating from studies on 802.11n [5], [6], 802.11ac-based unicast for streaming a single video to multiple clients may not be able to support more than a hundred users, assuming all of them have 802.11ac capable devices. Standard WiFi broadcast/multicast frames are transmitted at a fixed and low bit-rate without any feedback.…”

Section: A Limitations Of Existing Solutionsmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Evaluation of a Scalable WiFi Multicast Scheme in the ORBIT Testbed

Bejerano¹,

Ferragut

Guo³

et al. 2014

2014 Third GENI Research and Educational Experiment Workshop

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IEEE 802.11-based wireless local area networks, referred to as WiFi, have been globally deployed and the vast majority of the mobile devices are currently WiFi-enabled. While WiFi has been proposed for multimedia content distribution, its lack of adequate support for multicast services hinders its ability to provide multimedia content distribution to a large number of devices. In earlier work, we proposed a dynamic scheme called AMuSe that selects a subset of the multicast receivers as feedback nodes. The feedback nodes periodically send information about channel quality to the multicast sender and the sender in turn can optimize multicast service quality, e.g., by dynamically adjusting transmission bit-rate. In this paper, we discuss several experimental results for the performance evaluation of AMuSe. Our experiments use more than 250 nodes placed in a grid topology in the ORBIT testbed. We consider different experimental scenarios: with and without the presence of external noise. Our focus is on studying the performance of WiFi nodes in WiFi multicast and establishing the conditions that make AMuSe an attractive scheme for feedback in WiFi multicast.

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Section: A Limitations Of Existing Solutionsmentioning

confidence: 99%

Section: A Limitations Of Existing Solutionsmentioning

confidence: 99%

Experimental Evaluation of a Scalable WiFi Multicast Scheme in the ORBIT Testbed

Bejerano¹,

Ferragut

Guo³

et al. 2014

2014 Third GENI Research and Educational Experiment Workshop

View full text Add to dashboard Cite

show abstract

“…Most of them are based on dense deployments of Access Points (APs) and require considerable capital and operational expenditure, may suffer from interference between APs, and may exacerbate hidden node problems [4], [5]. Multicast offers another approach for video delivery to large groups of users interested in venue specific content (e.g., sports arenas, entertainment centers, and lecture halls).…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of large scale WiFi multicast rate control

Gupta

Gutterman

Bejerano

et al. 2016

IEEE INFOCOM 2016 - The 35th Annual IEEE International Conference on Computer Communications

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Abstract-WiFi multicast to very large groups has gained attention as a solution for multimedia delivery in crowded areas. Yet, most recently proposed schemes do not provide performance guarantees and none have been tested at scale. To address the issue of providing high multicast throughput with performance guarantees, we present the design and experimental evaluation of the Multicast Dynamic Rate Adaptation (MuDRA) algorithm. MuDRA balances fast adaptation to channel conditions and stability, which is essential for multimedia applications. MuDRA relies on feedback from some nodes collected via a light-weight protocol and dynamically adjusts the rate adaptation response time. Our experimental evaluation of MuDRA on the ORBIT testbed with over 150 nodes shows that MuDRA outperforms other schemes and supports high throughput multicast flows to hundreds of receivers while meeting quality requirements. MuDRA can support multiple high quality video streams, where 90% of the nodes report excellent or very good video quality.

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“…The 802.11n standard was officially released by the Institute of Electrical and Electronics Engineers (IEEE) in 2009 [1]. 802.11n was introduced to overcome the limitations of 802.11 a/b/g technology such as limited capacity, channel inefficiency and susceptibility to the radio frequency (RF) level loss.…”

Section: Introductionmentioning

confidence: 99%

“…MIMO, on the other hand, takes multipath as an advantage and uses advanced signal processing techniques such as Spatial Multiplexing (SM), Space-Time Block Coding (STBC) and Transmit Beamforming (TxBF) to combine and recover the original information at the receiver [3]. In 802.11n, the use of up to 4 * 4 MIMO is possible in uplink and downlink [1].…”

Section: Introductionmentioning

confidence: 99%

An Investigation on the Use of Itu-R P.1411-7 in 802.11N Path Loss Modelling

Priya¹,

Pillay²,

Saargunawathy³

et al. 2014

PIER Letters

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Abstract-Free space path loss modelling is a model used to model path loss propagation for Wireless Local Area Networks. In some cases, the estimation of path loss by the FSL model can be inaccurate as it does not take into account the effects of multipath propagation. The International Telecommunication Union Recommendation, ITU-R P.1411-7 provides prediction methods for the planning of short-range outdoor radio communication systems and radio local area networks in the frequency range of 300 MHz to 100 GHz. This recommendation further proposes a location variability correction, ρ, which models the standard deviation of field strength due to small scale fading. This paper investigates the feasibility of using the ITU-R P.1141-7 Recommendation to estimate the path loss for 802.11n signals experienced by pedestrians in a suburban environment. Received signal strengths were collected from field experiments, and the measured path loss was compared with estimated path loss values. The results show that for areas with high levels of small scale fading, the ITU-R P.1141-7 was able to estimate the path loss for IEEE 802.11n signals with a higher accuracy of 10 dB than the FSL model.

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On the performance of IEEE 802.11n protocol

Cited by 12 publications

References 11 publications

Experimental Evaluation of a Scalable WiFi Multicast Scheme in the ORBIT Testbed

Experimental Evaluation of a Scalable WiFi Multicast Scheme in the ORBIT Testbed

Experimental evaluation of large scale WiFi multicast rate control

An Investigation on the Use of Itu-R P.1411-7 in 802.11N Path Loss Modelling

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