The LTE link-layer design

  • Authors:
  • Anna Larmo;Magnus Lindström;Michael Meyer;Ghyslain Pelletier;Johan Torsner;Henning Wiemann

  • Affiliations:
  • Ericsson Research;Ericsson Research;Ericsson Research;Ericsson Research;Ericsson Research;Ericsson Research

  • Venue:
  • IEEE Communications Magazine
  • Year:
  • 2009

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Abstract

The LTE radio interface for 3GPP Release 8 was specified recently. This article describes the LTE link-layer protocols, which abstract the physical layer and adapt its characteristics to match the requirements of higher layer protocols. The LTE link-layer protocols are optimized for low delay and low overhead and are simpler than their counterparts in UTRAN. The state-of-the-art LTE protocol design is the result of a careful crosslayer approach where the protocols interact with each other efficiently. This article provides a thorough overview of this protocol stack, including the sub-layers and corresponding interactions in between them, in a manner that is more intuitive than in the respective 3GPP specifications.