Energy Efficient Downlink Transmission in Wireless LANs by Using Low-Power Wake-Up Radio
Joint Authors
Source
Wireless Communications and Mobile Computing
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-12-24
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Information Technology and Computer Science
Abstract EN
In the downlink of a wireless LAN, power-save mode is a typical method to reduce power consumption.
However, it usually causes large delay.
Recently, remote wake-up control via a low-power wake-up radio (WuR) has been introduced to activate a node to instantly receive packets from an access point (AP).
But link quality is not taken into account and protocol overhead of wake-up per node is relatively large.
To solve these problems, in this paper, a broadcast-based wake-up control framework is proposed, and a low-power WuR is used to receive traffic indication map from an AP, monitor link quality, and perform carrier sense.
Among the nodes which have packets buffered at the AP, only those whose SNR is above a threshold will be activated, contending via a proper contention window to receive packets from the AP.
Optimal SNR threshold, deduced by theoretical analysis, helps to reduce transmission collisions and false wake-ups (caused by wake-up latency) and improve transmission rate.
Extensive simulations confirm that the proposed method (i) effectively reduces power consumption of nodes compared with other methods, (ii) has less delay than power-save mode in times of light traffic, and (iii) achieves higher throughput than other methods in the saturation state.
American Psychological Association (APA)
Tang, Suhua& Obana, Sadao. 2017. Energy Efficient Downlink Transmission in Wireless LANs by Using Low-Power Wake-Up Radio. Wireless Communications and Mobile Computing،Vol. 2017, no. 2017, pp.1-12.
https://search.emarefa.net/detail/BIM-1205693
Modern Language Association (MLA)
Tang, Suhua& Obana, Sadao. Energy Efficient Downlink Transmission in Wireless LANs by Using Low-Power Wake-Up Radio. Wireless Communications and Mobile Computing No. 2017 (2017), pp.1-12.
https://search.emarefa.net/detail/BIM-1205693
American Medical Association (AMA)
Tang, Suhua& Obana, Sadao. Energy Efficient Downlink Transmission in Wireless LANs by Using Low-Power Wake-Up Radio. Wireless Communications and Mobile Computing. 2017. Vol. 2017, no. 2017, pp.1-12.
https://search.emarefa.net/detail/BIM-1205693
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1205693