Resource Management for OFDMA based Next Generation 802.11 WLANs

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Abstract

Recently, IEEE 802.11ax Task Group has adapted OFDMA as a new technique for enabling multi-user transmission. It has been also decided that the scheduling duration should be same for all the users in a multi-user OFDMA so that the transmission of the users should end at the same time. In order to realize that condition, the users with insufficient data should transmit null data (i.e. padding) to fill the duration. While this scheme offers strong features such as resilience to Overlapping Basic Service Set (OBSS) interference and ease of synchronization, it also poses major side issues of degraded throughput performance and waste of devices' energy. In this work, for OFDMA based 802.11 WLANs we first propose practical algorithm in which the scheduling duration is fixed and does not change from time to time. In the second algorithm the scheduling duration is dynamically determined in a resource allocation framework by taking into account the padding overhead, airtime fairness and energy consumption of the users. We analytically investigate our resource allocation problems through Lyapunov optimization techniques and show that our algorithms are arbitrarily close to the optimal performance at the price of reduced convergence rate. We also calculate the overhead of our algorithms in a realistic setup and propose solutions for the implementation issues.

Details

Authors
Organisations
External organisations
  • Sony Mobile Communications AB
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Communication Systems
Original languageEnglish
Title of host publicationIFIP Wireless and Mobile Networking Conference (WMNC)
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages57-64
Number of pages8
ISBN (Electronic)9781467387460
Publication statusPublished - 2016 Aug 15
Publication categoryResearch
Peer-reviewedYes
Event9th IFIP Wireless and Mobile Networking Conference - WMNC - Colmar, France
Duration: 2016 Jul 112016 Jul 13

Conference

Conference9th IFIP Wireless and Mobile Networking Conference - WMNC
CountryFrance
CityColmar
Period2016/07/112016/07/13

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