A high efficiency MAC protocol for WLANs: providing fairness in dense scenarios
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- dc.contributor.author Sanabria Russo, Luis
- dc.contributor.author Barceló Vicens, Jaume
- dc.contributor.author Bellalta, Boris
- dc.contributor.author Gringoli, Francesco
- dc.date.accessioned 2020-04-07T08:18:59Z
- dc.date.available 2020-04-07T08:18:59Z
- dc.date.issued 2016
- dc.description.abstract Collisions are a main cause of throughput degradation in wireless local area networks. The current contention mechanism used in the IEEE 802.11 networks is called carrier sense multiple access with collision avoidance (CSMA/CA). It uses a binary exponential backoff technique to randomize each contender attempt of transmitting, effectively reducing the collision probability. Nevertheless, CSMA/CA relies on a random backoff that while effective and fully decentralized, in principle is unable to completely eliminate collisions, therefore degrading the network throughput as more contenders attempt to share the channel. To overcome these situations, carrier sense multiple access with enhanced collision avoidance (CSMA/ECA) is able to create a collision-free schedule in a fully decentralized manner using a deterministic backoff after successful transmissions. Hysteresis and fair share are two extensions of CSMA/ECA to support a large number of contenders in a collision-free schedule. CSMA/ECA offers better throughput than CSMA/CA and short-term throughput fairness. This paper describes CSMA/ECA and its extensions. In addition, it provides the first evaluation results of CSMA/ECA with non-saturated traffic, channel errors, and its performance when coexisting with CSMA/CA nodes. Furthermore, it describes the effects of imperfect clocks over CSMA/ECA and presents a mechanism to leverage the impact of channel errors and the addition/withdrawal of nodes over collision-free schedules. Finally, the experimental results on throughput and lost frames from a CSMA/ECA implementation using commercial hardware and open-source firmware are presented.en
- dc.description.sponsorship This work was supported in part by the Spanish Government through the Project CISNETS under Grant TEC2012-32354 and in part by the Catalan Government under Grant SGR 2014-1173.
- dc.format.mimetype application/pdf
- dc.identifier.citation Sanabria Russo L, Barcelo J, Bellalta B, Gringoli F. A high efficiency MAC protocol for WLANs: providing fairness in dense scenarios. IEEE ACM Trans Netw. 2016 Jul 27;25(1):492-505. DOI: 10.1109/TNET.2016.2587907
- dc.identifier.doi http://dx.doi.org/10.1109/TNET.2016.2587907
- dc.identifier.issn 1063-6692
- dc.identifier.uri http://hdl.handle.net/10230/44168
- dc.language.iso eng
- dc.publisher Institute of Electrical and Electronics Engineers (IEEE)
- dc.relation.ispartof IEEE/ACM Transactions on Networking. 2016 Jul 27;25(1):492-505
- dc.relation.projectID info:eu-repo/grantAgreement/ES/1PE/TEC2012-32354
- dc.rights © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. http://dx.doi.org/10.1109/TNET.2016.2587907
- dc.rights.accessRights info:eu-repo/semantics/openAccess
- dc.subject.keyword CSMA/ECAen
- dc.subject.keyword WLANen
- dc.subject.keyword MACen
- dc.subject.keyword Collision-freeen
- dc.subject.keyword Testbeden
- dc.title A high efficiency MAC protocol for WLANs: providing fairness in dense scenariosen
- dc.type info:eu-repo/semantics/article
- dc.type.version info:eu-repo/semantics/acceptedVersion