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Resource Management for OFDMA based Next Generation 802.11 WLANs

Karaca, Mehmet LU ; Bastani, Saeed LU ; Priyanto, Basuki Endah; Safavi, Mohammadhassan LU and Landfeldt, Björn LU (2016) 9th IFIP Wireless and Mobile Networking Conference - WMNC In IFIP Wireless and Mobile Networking Conference (WMNC) p.57-64
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... (More)

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.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
IFIP Wireless and Mobile Networking Conference (WMNC)
pages
8 pages
publisher
Institute of Electrical and Electronics Engineers Inc.
conference name
9th IFIP Wireless and Mobile Networking Conference - WMNC
external identifiers
  • Scopus:84986005240
  • Scopus:84986005240
DOI
10.1109/WMNC.2016.7543930
language
English
LU publication?
yes
id
6e93af55-dfdf-423e-abcc-b561e7aeeedd
date added to LUP
2016-05-09 10:38:58
date last changed
2016-12-06 09:31:48
@misc{6e93af55-dfdf-423e-abcc-b561e7aeeedd,
  abstract     = {<p>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.</p>},
  author       = {Karaca, Mehmet and Bastani, Saeed and Priyanto, Basuki Endah and Safavi, Mohammadhassan and Landfeldt, Björn},
  language     = {eng},
  pages        = {57--64},
  publisher    = {ARRAY(0x8fab948)},
  series       = {IFIP Wireless and Mobile Networking Conference (WMNC)},
  title        = {Resource Management for OFDMA based Next Generation 802.11 WLANs},
  url          = {http://dx.doi.org/10.1109/WMNC.2016.7543930},
  year         = {2016},
}