6. Medium Access Control (MAC)

  1. SeungJune Yi,
  2. SungDuck Chun,
  3. YoungDae Lee,
  4. SungJun Park and
  5. SungHoon Jung

Published Online: 5 SEP 2012

DOI: 10.1002/9781118188545.ch6

Radio Protocols for LTE and LTE-Advanced

Radio Protocols for LTE and LTE-Advanced

How to Cite

Yi, S., Chun, S., Lee, Y., Park, S. and Jung, S. (2012) Medium Access Control (MAC), in Radio Protocols for LTE and LTE-Advanced, John Wiley & Sons, Ltd, Chichester, UK. doi: 10.1002/9781118188545.ch6

Author Information

  1. LG Electronics, South Korea

Publication History

  1. Published Online: 5 SEP 2012
  2. Published Print: 5 SEP 2012

ISBN Information

Print ISBN: 9781118188538

Online ISBN: 9781118188545



  • control entity;
  • discontinuous reception (DRX) procedure;
  • HARQ entity;
  • hybrid automatic repeat request (HARQ);
  • medium access control (MAC) layer;
  • multiplexing/de-multiplexing entity;
  • prioritization entity;
  • semi-persistent scheduling (SPS) procedure


Medium access control (MAC) layer basically provides the radio resource allocation service and the data transfer service to the upper layer. As part of the data transfer service, the MAC layer performs procedures such as scheduling requests, buffer status reporting, random access, and hybrid automatic repeat request (HARQ). In addition, the MAC layer handles the semi-persistent scheduling (SPS) procedure and the discontinuous reception (DRX) procedure. The SPS procedure is used to increase the cell capacity for a voice service, and the DRX procedure is used to reduce the power consumption of the UE. The MAC layer supports the functions such as connecting the upper layer with the lower layer, transferring data and controlling radio resource. The MAC layer is composed of a HARQ entity, a multiplexing/de-multiplexing entity, a logical channel prioritization entity, and a control entity.

Controlled Vocabulary Terms

automatic repeat request; demultiplexing; media access protocol; multiplexing; scheduling