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A Cooperative ARQ Scheme for Infrastructure WLANs

Nischal, S and Sharma, Vinod (2013) A Cooperative ARQ Scheme for Infrastructure WLANs. In: 2013 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC) , APR 07-10, 2013 , Shanghai, China, pp. 428-433.

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Official URL: http://dx.doi.org/10.1109/WCNC.2013.6554602

Abstract

We propose a Cooperative Opportunistic Automatic Repeat ReQuest (CoARQ) scheme to solve the HOL-blocking problem in infrastructure IEEE 802.11 WLANs. HOL blocking occurs when the head-of-the-line packet at the Access Point (AP) queue blocks the transmission of packets to other destinations resulting in severe throughput degradation. When the AP transmits a packet to a mobile station (STA), some of the nodes in the vicinity can overhear this packet transmission successfully. If the original transmission by the AP is unsuccessful, our CoARQ scheme chooses the station. STA or AP) with the best channel to the intended receiver as a relay and the chosen relay forwards the AP's packet to the receiver. This way, our scheme removes the bottleneck at the AP, thereby providing significant improvements in the throughput of the AP. We analyse the performance of our scheme in an infrastructure WLAN under a TCP controlled file download scenario and our analytical results are further validated by extensive simulations.

Item Type: Conference Proceedings
Additional Information: copyright for this article belongs to IEEE,USA
Keywords: WLAN; cooperative communication
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Depositing User: Id for Latest eprints
Date Deposited: 02 Jan 2014 10:41
Last Modified: 02 Jan 2014 10:43
URI: http://eprints.iisc.ac.in/id/eprint/47995

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