Zeroforcing precoding based MAC design to address hidden terminals in MU-MIMO WLANs

Sanjeeb Shrestha, Gengfa Fang, Eryk Dutkiewicz, Xiaojing Huang

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

5 Citations (Scopus)

Abstract

This paper focuses on the Medium Access Control (MAC) layer design for an inevitable Hidden Terminal problem in Multi User Multiple Input Multiple Output (MU-MIMO) Wireless Local Area Networks (WLANs). Specifically, our MAC design is supported by the precoding vectors obtained by Zeroforcing technique which are used to address the Hidden Terminals. An efficient channel sounding process is used by our MAC protocol to obtain the Channel State Information (CSI) from the desired and undesired clients which are used to calculate the precoding vectors at the transmitters (Access Points). Our MAC design then uses these precoding vectors in order to null interferences among the undesired clients to avoid collision of signals and to maintain the concurrent transmissions among the desired clients. The the parameters such as network capacity, signaling overheads and fairness are considered in the design. Our MAC layer design shows a slightly higher signaling overhead compared to RTS/CTS scheme. However, due to the concurrent transmissions after the handshaking process, the cost of singling overheads are compensated. The simulation study of our MAC layer design shows a remarkable constant network capacity gain of 4-5 times in comparison to traditional RTS/CTS. Moreover, the gain is irrespective to the available air-time.

Original languageEnglish
Title of host publication2015 22nd International Conference on Telecommunications, ICT 2015
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages283-288
Number of pages6
ISBN (Electronic)9781479980789
DOIs
Publication statusPublished - 16 Jun 2015
Event2015 22nd International Conference on Telecommunications, ICT 2015 - Sydney, Australia
Duration: 27 Apr 201529 Apr 2015

Other

Other2015 22nd International Conference on Telecommunications, ICT 2015
CountryAustralia
CitySydney
Period27/04/1529/04/15

Fingerprint Dive into the research topics of 'Zeroforcing precoding based MAC design to address hidden terminals in MU-MIMO WLANs'. Together they form a unique fingerprint.

Cite this