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"Minstrel-Blues" - Practical Joint Rate und Power Control in Linux mac80211 with todays 802.11b/g/a/n Chips
This proposal has been accepted as a session.
One Line Summary
I will present the design, implemenation and performance imapct of my pratical joint rate and power control algorithm "Minstrel-Blues" within Linux mac80211 and IEEE 802.11 a/b/g/n Atheros chips.
Abstract
Todays WiFi networks do only focus on rate control as adaptation to dynamic channel conditions. Transmit power control is
limited to a common power level with a rather fixed and high value for all outgoing packets. This leads to unnecessary high interference within the wireless network and therefore decreased overall network throughput. With Minstrel-Blues we introduce the first practical joint rate and power control algorithm in the Linus kernel. Its objective is to dynamically control the power levels of outgoing packets per communication link in such a way, that is tries to find the minimum power level needed to transmit with the same performance in terms of throughput. Our results show that in many cases we can significantly reduce transmission power levels while maintaining the same throughput per link and therefore reduce the overall interference within the network. The decreased level of interference give more transmission opportunities to other links (increased spatial reuse) and hence increases the sum network throughput. We have implemented our algorithm in Minstrel and Minstrel_HT at the mac80211 subsystem and adapted ath5k and ath9k to make use of a wide subset of Atheros chips that do provide fine grain power level settings per packet.
Tags
TPC, joint rate power control, 802.11h, mac80211
Presentation Materials
slidesSpeaker
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Thomas Hühn
Technical University of BerlinBiography
I am a 37 years old senior researcher at Technical University of Berlin who oszillates between my home village Sundhausen & my work town Berlin.
Since 2003 I am building Freifunk mesh networks in and around my home village to get and distribute broadband Internet in our rural area.
I am an active member of Freifunk association since 10 years and since than I have planed, built and do operate a 100 nodes Freifunk network to provide internet access in 5 villages without DSL connectivity.
Within my daily job as reseearcher I focus on practical transmit power control and rate control in WiFi networks based on Openwrt Linux.Sessions
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* "Minstrel-Blues" - Practical Joint Rate und Power Control in Linux mac80211 with todays 802.11b/g/a/n Chips
- Title: "Minstrel-Blues" - Practical Joint Rate und Power Control in Linux mac80211 with todays 802.11b/g/a/n Chips
- Microconference: Wireless Networking
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One Line Summary:
I will present the design, implemenation and performance imapct of my pratical joint rate and power control algorithm “Minstrel-Blues” within Linux mac80211 and IEEE 802.11 a/b/g/n Atheros chips.
- slides
- Speakers: Thomas Hühn
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