Why we need RACH Process?

  • Initial access from RRC_Idle
  • RRC Connection Reestablishment procedure;
  • Handover
  • DL or UL data arrival during RRC_CONNECTED when ULsynchronisation status is nonsynchronised
  • Transition from RRC_INACTIVE;
  • To establish time alignment atSCell addition;
  • Request for Other SI
  • Beam failure recovery.
  • All of above
  • None of Above
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