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X2 layer 1

The main functions of X2 interface layer 1 are as following:

  • Interface to physical medium;
  • Frame delineation;
  • Line clock extraction capability;
  • Layer 1 alarms extraction and generation;
  • Transmission quality control.
Protocol specification
3GPP TS 36.421 - Evolved Universal Terrestrial Radio Access Network (E-UTRAN); X2 layer 1