NDLI: Energy efficiency of an enhanced DCF access method using bidirectional communications for infrastructure-based IEEE 802.11 WLANs

Content Provider	IEEE Xplore Digital Library
Author	Palacios, R. Granelli, F. Kliazovich, D. Alonso, L. Alonso-Zarate, J.
Copyright Year	2013
Description	Author affiliation: Univ. of Trento, Trento, Italy (Palacios, R.; Granelli, F.) \|\| Univ. of Luxembourg, Luxembourg, Luxembourg (Kliazovich, D.) \|\| Univ. Politec. de Catalunya (UPC-EETAC), Barcelona, Spain (Alonso, L.) \|\| Centre Tecnol. de Telecomunicacions de Catalunya (CTTC), Castelldefels, Spain (Alonso-Zarate, J.)
Abstract	The Distributed Coordination Function (DCF) is the fundamental access method defined in the IEEE 802.11 Standard for Wireless Local Area Networks (WLANs). With this standard, the Access Point (AP) and the mobile stations consume a significant amount of energy to contend for access to the shared wireless channel. In order to improve the energy efficiency of WLANs, we investigate in this paper a simple and backwards compatible mechanism, called Bi-Directional DCF (BD-DCF), that enables bidirectional communications between wireless stations with a single channel access invocation. The key idea is to let the AP or any mobile station transmit a data packet together with the acknowledgement upon the successful reception of a data packet. This approach reduces the communication overhead, the channel contention, and better balances uplink and downlink transmission opportunities. We evaluate the performance of the proposed BD-DCF by means of computer-based simulation considering different traffic loads, degrees of traffic symmetry, data packet sizes, and data rates. The results presented in this paper show that the BD-DCF protocol can improve the energy efficiency of DCF up to 50%.
Sponsorship	IEEE Commun. Soc.
Starting Page	38
Ending Page	42
File Size	575128
Page Count	5
File Format	PDF
ISBN	9781467349192
DOI	10.1109/CAMAD.2013.6708085
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-09-25
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless communication Wireless sensor networks Wireless LAN Bidirectional control Mobile communication Downlink Uplink
Content Type	Text
Resource Type	Article

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