Optimizing M2M Energy Efficiency in IEEE 802.11ah

Zhao Y., YILMAZ O., Larmo A.

IEEE Globecom Workshops (GC Wkshps), California, United States Of America, 6 - 10 December 2015 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/glocomw.2015.7414004
  • City: California
  • Country: United States Of America
  • Keywords: Wi-Fi, IEEE 802.11ah, M2M, IoT, Energy efficiency, Energy harvesting
  • Dokuz Eylül University Affiliated: Yes


In order to efficiently support the Machine-to-Machine (M2M) applications, a new amendment of Wi-Fi standard known as IEEE 802.11ah is introduced. In 802.11ah, several enhanced MAC features are added so as to provide scalability for a large number of stations as well as to reduce the energy consumption compared with the existing Wi-Fi technologies. In this paper, a selected set of 802.11ah MAC features are discussed and optimized mainly from the perspective of energy utilization. Moreover, a new energy-saving mode, FESM, is proposed and analyzed. The evaluations are carried out with a system-level MAC simulator assuming an uplink scenario with sporadic data traffic; and complemented with an in-depth analysis for a selected M2M use case, the farming scenario, along with the energy harvesting potential.