Adaptive Packet Coalescing Mechanism in Energy Efficient Ethernet

Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 214)


IEEE 802.3az working group has defined Energy Efficient Ethernet (EEE) specification that implements low-power idle (LPI) modes to improve the efficiency of an Ethernet equipment. LPI mechanism allows an Ethernet link to reduce power consumption by entering a low-power sleeping mode and letting some components being powered off when there is no data to be transmitted through the link. However, if small amount of packets are being sent periodically, LPI mechanism cannot obtain energy efficiency due to a high overhead caused by excessive mode transitions. To overcome this problem, packet coalescing mechanism was proposed. Though coalescing improves the energy efficiency, TCP performance might be degraded due to increased packet delay. This paper proposes and evaluates an enhanced packet coalescing mechanism. The simulation results show that proposed mechanism shows higher performance than LPI mechanism with respect to energy consumption rate and packet transmission delay.


IEEE 802.3az Energy Efficient Ethernet Adaptive coalescing mechanism LPI mechanism Low-power idle 



This work (Grants No. C0029530) was supported by Business for Cooperative R&D between Industry, Academy, and Research Institute funded Korea Small and Medium Business Administration in 2012.


  1. 1.
    Christensen, K., Reviriego, P., et al.: IEEE the road to energy efficient ethernet. Commun. Mag. IEEE 48(11), 50–56 (2010)CrossRefGoogle Scholar
  2. 2.
    Green Growth Korea: Green IT national strategy for low carbon and green growth (2010)Google Scholar
  3. 3.
    IEEE P802.3az: Energy efficient ethernet task force (2010)Google Scholar
  4. 4.
    Reviriego, P., Hernandez, J., Larrabeiti, D., Maestro, J.: Performance evaluation of Energy Efficient Ethernet. IEEE. Commun. Lett. 13(9), 697–699 (2009)Google Scholar
  5. 5.
    Mostowfi, M., Christensen, K.: Saving energy in LAN switches: new methods of packet coalescing for Energy Efficient Ethernet. In: Green Computing Conference and Workshops (IGCC), pp. 1–8 (2011)Google Scholar
  6. 6.
    Reviriego, P., et al.: Burst transmission in Energy Efficient Ethernet. IEEE Internet Comput. 14(4), 50–57 (2010)Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Sung-Keun Lee
    • 1
  • Yong-Jae Jang
    • 1
  • Kyoung-Wook Park
    • 2
  1. 1.Department of Multimedia EngineeringSunchon National UniversitySunchonKorea
  2. 2.Division of Culture ContentsChonnam National UniversityGwangjuKorea

Personalised recommendations