5G NR PRACH - NR Random Access Procedure :- Situation’s that trigger Rach process in NR : As per 38.300-9.2.6 as follows. Following use cases were used even in LTE case also i) Initial access from RRC_IDLE; ii) RRC Connection Re-establishment procedure; iii) Handover; iv) DL or UL data arrival during RRC_CONNECTED when UL synchronisation status is "non-synchronised"; Following cases would be NR specific v) Transition from RRC_INACTIVE; vi) To establish time alignment at SCell addition; vii) Request for Other SI viii) Beam failure recovery. How to find Time and Frequency resources to send RACH ? After obtaining Rach information from signaling , UE should be able to calculate Time and frequency Domain location in order to send PRACH. Time resources used by PRACH indicated by prach-ConfigurationIndex following parameters: PRACH format : These are the available format’s { A1, A2, A3, B1, B2, B3, B4, C0 or C2 } PRACH co