Collision-Aware Rate Adaptation Algorithm for High-Throughput IEEE 802.11n WLANs

The wireless mesh network (WMN) is a future network technology that develops single-hop wireless local area networks (WLANs) into multi-hop wireless mesh networks, based on the IEEE 802.11s standard. However, this development still presents many challenges, such as determining the best route between sources and destinations, especially taking into account the use of the medium access control (MAC) and physical (PHY) layers of IEEE 802.11n/ac. Some papers have proposed rate adaptation algorithms particularly for single-hop networks; however, these only focused on mechanisms to find data rates suitable for channel conditions. In IEEE 802.11s WMNs, the design of the rate adaptation algorithm is more challenging. Besides considering the problem of channel quality and optimal throughput, it is necessary to also consider the problem of collision and the best route. It is important to take collision into account because the collision probability in multi-hop mesh networks is higher than that in single-hop networks and can lead to a lower throughput. Rate adaptation algorithms for IEEE 802.11s WMNs have been proposed in other papers, but they also do not consider the use of the MAC and PHY layers of IEEE 802.11n/ac. In this paper, we propose the collision-aware rate adaptation for optimal high-throughput (CARA-OHT) algorithm for WMN IEEE 802.11s. An evaluation through the extensive use of a network NS-3 simulator shows that the proposed algorithm exhibits a higher throughput than previously developed algorithms.

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An Interference-Aware Rate and Channel Adaptation Scheme for Dense IEEE 802.11n Networks

Wireless Communications and Mobile Computing ◽

10.1155/2019/1902463 ◽

2019 ◽

Vol 2019 ◽

pp. 1-14 ◽

Cited By ~ 1

Author(s):

Tingpei Huang ◽

Shibao Li ◽

Xiaoxuan Lu ◽

Shaoshu Gao

Keyword(s):

Transmission Rate ◽

Rate Adaptation ◽

Coarse Grained ◽

Adaptation Algorithm ◽

Current Channel ◽

Ieee 802.11N ◽

Fine Grained ◽

Channel Conditions ◽

Rapid Deployment ◽

Adaptation Scheme

Rate adaptation, which dynamically chooses transmission rate provided at the physical layer according to the current channel conditions, is a fundamental resource management issue in IEEE 802.11 networks with the goal of maximizing the network throughput. Traditional rate adaptation algorithms for IEEE 802.11n networks do not consider the interference problem, which becomes much more serious due to the rapid deployment of IEEE 802.11n devices and large number of mobile terminals. In this paper, an interference-aware rate and channel adaptation scheme RaCA for intensive IEEE 802.11n networks was proposed. Firstly, RaCA leverages RSSI and CSI information together to measure the current channel conditions at the receiver side. RSSI is a coarse-grained indicator and CSI is a fine-grained indicator. Secondly, a two-stage rate adaptation scheme TSRA was designed, which can quickly adapt to optimal bit rate based on RSSI and CSI information. Finally, a quorum-based channel adaptation algorithm QCA was proposed, which does not need control channel. If channel suffers severe interferences, RaCA calls QCA to choose another channel to work on. Simulation and testbed implementation results demonstrate that RaCA achieves significant throughput gain over SampleLite and Minstrel-HT.

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Evaluation of the Minstrel-HT Rate Adaptation Algorithm in IEEE 802.11n WLANs

International Journal of Simulation Systems Science & Technology ◽

10.5013/ijssst.a.18.01.11 ◽

2017 ◽

Author(s):

Teuku Yuliar Arif

Keyword(s):

Rate Adaptation ◽

Adaptation Algorithm ◽

Ieee 802.11N

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An Innovative Rate Adaptation Algorithm for Multicast Transmissions in Wireless LANs

2013 IEEE 77th Vehicular Technology Conference (VTC Spring) ◽

10.1109/vtcspring.2013.6691882 ◽

2013 ◽

Cited By ~ 12

Author(s):

Stefano Paris ◽

Nicolo Facchi ◽

Francesco Gringoli ◽

Antonio Capone

Keyword(s):

Wireless Lans ◽

Rate Adaptation ◽

Adaptation Algorithm

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Client-Driven Joint Cache Management and Rate Adaptation for Dynamic Adaptive Streaming over HTTP

International Journal of Digital Multimedia Broadcasting ◽

10.1155/2013/471683 ◽

2013 ◽

Vol 2013 ◽

pp. 1-16 ◽

Cited By ~ 3

Author(s):

Chenghao Liu ◽

Miska M. Hannuksela ◽

Moncef Gabbouj

Keyword(s):

Rate Adaptation ◽

Cache Management ◽

Adaptive Streaming ◽

Adaptation Algorithm ◽

Proxy Cache ◽

Proxy Caches ◽

Simulation Results ◽

And Storage ◽

Media Data ◽

Adaptation Method

Due to the fact that proxy-driven proxy cache management and the client-driven streaming solution of Dynamic Adaptive Streaming over HTTP (DASH) are two independent processes, some difficulties and challenges arise in media data management at the proxy cache and rate adaptation at the DASH client. This paper presents a novel client-driven joint proxy cache management and DASH rate adaptation method, named CLICRA, which moves prefetching intelligence from the proxy cache to the client. Based on the philosophy of CLICRA, this paper proposes a rate adaptation algorithm, which selects bitrates for the next media segments to be requested by using the predicted buffered media time in the client. CLICRA is realized by conveying information on the segments that are likely to be fetched subsequently to the proxy cache so that it can use the information for prefetching. Simulation results show that the proposed method outperforms the conventional segment-fetch-time-based rate adaptation and the proxy-driven proxy cache management significantly not only in streaming quality at the client but also in bandwidth and storage usage in proxy caches.

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