Total views : 209

Investigation of an Improved Adaptive Power Saving Technique for IEEE 802.11ac Systems


  • School of Electronics Engineering, VIT University, Vellore – 14, India


Background/Objectives: Recent advances in IEEE 802.11ac based wireless networks have made them potential enough to be used for Voice over Wireless Local Area Networks (VoWLAN). The main requirement in the design of such network is to minimize the energy consumption to maximize the network lifetime of user equipment’s. Methods/Statistical Analysis: For such energy conservation, the IEEE 802.11ac networks make use of power saving protocols, where the wireless radio is turned on and off periodically. In this paper, a group based adaptive power saving mechanism is suggested that dynamically utilize the contention and transmission opportunity parameters of user equipment. Findings: The design of the power saving is unique as the grouping is based on the current power level of user equipment’s, type of service, channel status and the number of services to a user equipment. Application/Improvements: Simulation results shows that proposed grouping technique provides an improvement of 46.25% and 47.29% in terms of energy consumption and delay, respectively compared the existing power saving protocol for delay sensitive and VoWLAN applications.


IEEE 802.11ac, Medium Access Control, VoWLAN, Wireless Networks.

Full Text:

 |  (PDF views: 165)


  • Zeng Z, Gao Y, Kumar PR. Sofa: A sleep-optimal fair-attention scheduler for the power-saving mode of WLANs. Proceeding IEEE International Conference on Distributed Computing Systems; 2011 Jun. p. 87–98.
  • Namboodiri V, Gao L. Energy-efficient VoIP over wireless LANs. IEEE Transaction Mobile Computing. 2010 Apr; 9(4):566–81.
  • Lee T, Hsieh J. Low complexity class-based scheduling algorithm for scheduled automatic power-save delivery for wireless LANs. IEEE Transaction, Mobile Computing. 2013 Mar; 12(3):571–80.
  • Palaciosa R, Mekonnena GM, Alonso-Zarateb J, Kliazovichc D, Granellia F. Analysis of an Energy-efficient MAC protocol based on polling for IEEE 802.11 WLANs. IEEE ICC-Communications QoS, Reliability and Modeling Symposium; 2015 Jun. p. 5941-7.
  • Lin H, Wei H. Deep Sleep: IEEE 802.11 Enhancements for Energy-Harvesting Machine-to-Machine Communications. IEEE Globecom-Wireless Networking Symposium; 2012 Dec. p.5231-6.
  • Liu L, Cao X, Cheng Y. Energy-efficient sleep scheduling for delay-constrained applications over WLANs. IEEE Transaction on Vehicular Technology. 2014 Jun; 63(5):2048-58.
  • He Y, Yuan R. A novel scheduled power saving mechanism for 802.11 wireless LANs. IEEE Transaction on Mobile Computing. 2009 Oct; 8(10):1368–83.
  • Kim HD, Cho DH. Enhanced power-saving mechanism for broadcast and multicast service in WLAN. IEEE Communication Letters. 2005 Jun; 9(6):520-2.
  • Hsieh JR, Lee TH, Kuo YW. Energy-efficient multi-polling scheme for wireless LANs. IEEE Transaction on Wireless Communication. 2009 Mar; 8(3):1532-41.
  • Chen X, Jin S, Qiao D. M-PSM: Mobility-aware power save mode for IEEE 802.11 WLANs. Proceeding IEEE International Conference on Distributed Computing Systems; 2011 Jun. p. 77–86.
  • Peck B, Qiao D. Practical PSM scheme for varying server delay. IEEE Transactions on Vehicular Technology. 2015 Jan; 64(1):303-14.
  • Zhu YH, Luan S, Leung VCM, Chi K. Enhancing timer-based power management to support delay-intolerant uplink traffic in infrastructure IEEE 802.11 WLANs. IEEE Transactions on Vehicular Technology. 2015 Jan; 64(1):386-99.
  • Anh NH, Giang PT. An enhanced MAC-layer improving to support QoS for multimedia data in wireless networks. Indian Journal of Science and Technology. 2016 May; 9(20):1-7.
  • Alam MK, Latif SA, Akter M, Arafat MY, Hakak S. Performance analysis of MAC layer scheduling schemes for IMM applications over high speed wireless campus network in IEEE 802.11e. Indian Journal of Science and Technology. 2015 Feb; 8(S3):53–61.


  • There are currently no refbacks.

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.