What is wrong/right with IEEE 802.11n spatial multiplexing power save feature?

Ioannis Pefkianakis*, Chi-Yu Li, Songwu Lu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

20 Scopus citations

Abstract

The IEEE 802.11n standard has proposed a new Spatial Multiplexing Power Save (SMPS) feature, which allows for a station to retain one active receive chain, to mitigate MIMO circuitry power consumption. But does it work in all cases? Our experiments reveal that SMPS may not always save power compared with multiple active chains at the receiver. Even when it does, it may be proven more energy hungry. In this work, we seek to uncover the "good", the "bad" and the "ugly" of SMPS using real experiments. We further devise a MIMO Receiver Energy Save (MRES) algorithm, which seeks to identify and set the most energy-efficient receive chain setting, by using a novel, low-overhead sampling scheme. Our prototype experiments show that, MRES outperforms SMPS with energy savings up to 37%.

Original languageEnglish
Title of host publication2011 19th IEEE International Conference on Network Protocols, ICNP 2011
Pages186-195
Number of pages10
DOIs
StatePublished - 26 Dec 2011
Event2011 19th IEEE International Conference on Network Protocols, ICNP 2011 - Vancouver, BC, Canada
Duration: 17 Oct 201120 Oct 2011

Publication series

NameProceedings - International Conference on Network Protocols, ICNP
ISSN (Print)1092-1648

Conference

Conference2011 19th IEEE International Conference on Network Protocols, ICNP 2011
CountryCanada
CityVancouver, BC
Period17/10/1120/10/11

Keywords

  • Energy Save
  • IEEE 802.11n
  • MIMO
  • Power

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  • Cite this

    Pefkianakis, I., Li, C-Y., & Lu, S. (2011). What is wrong/right with IEEE 802.11n spatial multiplexing power save feature? In 2011 19th IEEE International Conference on Network Protocols, ICNP 2011 (pp. 186-195). [6089050] (Proceedings - International Conference on Network Protocols, ICNP). https://doi.org/10.1109/ICNP.2011.6089050