REACT: Rate Adaptation using Coherence Time in 802.11 WLANs

Jung, Hakyung; Kwon, Ted Taekyoung; Cho, Kideok; Choi, Yanghee

doi:10.1016/j.comcom.2011.01.011

Cited by 25 publications

(12 citation statements)

References 31 publications

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“…The authors in [43] analysed the performance of rate adaptation techniques based on the concept of 'coherence time' using a channel emulator. Moreover, a rate selection policy was presented based on the speed and location of a vehicle [31].…”

Section: Resultsmentioning

confidence: 99%

Energy efficient Nano Servers provisioning for Information Piece Delivery in a vehicular environment

Igder

Bhattacharya

Qazi

et al. 2017

Vehicular Communications

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In this paper, we propose energy efficient Information Piece Delivery (IPD) through Nano Servers (NSs) in a vehicular network. Information pieces may contain any data that needs to be communicated to a vehicle. The available power (renewable or non-renewable) for a NS is variable. As a result, the service rate of a NS varies linearly with the available energy within a given range. Our proposed system therefore exhibits energy aware rate adaptation (RA), which uses variable transmission energy. We have also developed another transmission energy saving method for comparison, where sleep cycles (SC) are employed. Both methods are compared against an acceptable download time. To reduce the operational energy, we first optimise the locations of the NSs by developing a mixed integer linear programming (MILP) model, which takes into account the hourly variation of the traffic. The model is validated through a Genetic Algorithm (GA1). Furthermore, to reduce the gross delay over the entire vehicular network, the available renewable energy (wind farm) is optimally allocated to each NS according to piece demand. This, in turn, also reduces the network carbon footprint. A Genetic Algorithm (GA2) is also developed to validate the MILP results associated with this system. Through transmission energy savings, RA and SC further reduce the NSs energy consumption by 19% and 18% respectively, however at the expense of higher download time. MILP model 4 (with RA) and model 5 (with SC) reduced the delay by 81% and 83% respectively, while minimising the carbon footprint by 96% and 98% respectively, compared to the initial MILP model.

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Section: Resultsmentioning

confidence: 99%

Energy efficient Nano Servers provisioning for Information Piece Delivery in a vehicular environment

Igder

Bhattacharya

Qazi

et al. 2017

Vehicular Communications

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“…The results presented in this paper lay out that significant energy savings can be obtained if the reason of collisions is discriminated by rate adaptation schemes. One method for discrimination of the reason of collisions for WLANs is introduced in [3], which is an indication of the possibility of identification of the reason of packet collisions also for multi-hop wireless networks.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, packet errors also stem from the increased number of concurrent transmissions of multi-hop paths. Identification of the reason of packet losses, either collision or channel error, and reacting accordingly is shown to enhance the performance of rate adaptation in WLANs in [3]. Higher data rate, i.e.…”

Section: Introductionmentioning

confidence: 99%

Joint effect of data rate and routing strategy on energy-efficiency of IEEE 802.11 DCF based multi-hop wireless networks under hidden terminal existence

Aydoğdu

Sancakli

2015

Ad Hoc Networks

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a b s t r a c tWe investigate the joint effect of data rate and routing strategy on energy-efficiency of multi-hop wireless networks incorporating a comprehensive behavior of the IEEE 802.11 DCF under the presence of hidden terminals. Two basic routing strategies, direct transmission versus multi-hop routing, are considered over a large range of traffic loads. The goal of this study is to layout guidelines for a cross-layer energy-efficient rate adaptation algorithm, which takes medium access control and network layer dynamics into account together with the hidden terminal effect.Our results show that, for the low-power wireless IEEE 802.11g standard considered in this article, the highest data rate consumes the least power in multi-hop wireless networks when hidden terminals mostly constitute the reason of collisions. In case of channel impairments, adapting the rate jointly with the routing strategy can save the energy consumed per bit by up to 250% under moderate traffic loads and much more under heavy traffic loads.

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“…In this section, related work on wireless communications is given for the considered approach of using ML to have a mapping from images to wireless channel information. 11 Double the timing in the reference since our center frequency is half of [10].…”

Section: Related Workmentioning

confidence: 99%

Veni Vidi Dixi

Ayvasik

Gürsu

Kellerer

2019

Proceedings of the 15th International Conference on Emerging Networking Experiments and Technologies

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The upcoming industrial revolution requires deployment of critical wireless sensor networks for automation and monitoring purposes. However, the reliability of the wireless communication is rendered unpredictable by mobile elements in the communication environment such as humans or mobile robots which lead to dynamically changing radio environments. Changes in the wireless channel can be monitored with frequent pilot transmission. However, that would stress the battery life of sensors. In this work a new wireless channel estimation technique, Veni Vidi Dixi, VVD, is proposed. VVD leverages the redundant information in depth images obtained from the surveillance camera(s) in the communication environment and utilizes Convolutional Neural Networks (CNNs) to map the depth images of the communication environment to complex wireless channel estimations. VVD increases the wireless communication reliability without the need for frequent pilot transmission and with no additional complexity on the receiver. The proposed method is tested by conducting measurements in an indoor environment with a single mobile human. Up to authors' best knowledge our work is the first to obtain complex wireless channel estimation from only depth images without any pilot transmission. The collected wireless trace, depth images and codes are publicly available.

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REACT: Rate Adaptation using Coherence Time in 802.11 WLANs

Cited by 25 publications

References 31 publications

Energy efficient Nano Servers provisioning for Information Piece Delivery in a vehicular environment

Energy efficient Nano Servers provisioning for Information Piece Delivery in a vehicular environment

Joint effect of data rate and routing strategy on energy-efficiency of IEEE 802.11 DCF based multi-hop wireless networks under hidden terminal existence

Veni Vidi Dixi

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