NR MSG1 Analysis and Check points

 NR MSG1 Detailed Analysis:

FR2 +mmWave+120Khz Case:

rach_ConfigGeneric

{
  prach_ConfigurationIndex == '10'
  msg1_FDM == 'one'
  msg1_FrequencyStart == '0'
  zeroCorrelationZoneConfig == '0'
  preambleReceivedTargetPower == '-74'
  preambleTransMax == 'n100'
  powerRampingStep == 'dB4'
  ra_ResponseWindow == 'sl80'
}

totalNumberOfRA_Preambles == '63'
totalNumberOfRA_Preambles == '10
ssb_perRACH_OccasionAndCB_PreamblesPerSSB  one  : 'n48'
ra_ContentionResolutionTimer == 'sf64'
prach_RootSequenceIndex :  l139 == '0'
msg1_SubcarrierSpacing == 'kHz120'
restrictedSetConfig == 'unrestrictedSet'

As per Spec , Preamble Format A1, Starting symbol =0  and

38.211 v15.3.0-Table 6.3.3.2-4: Random access configurations for FR2 and unpaired spectrum

38.211 - Table 6.3.3.1-2: Preamble formats for   and   where   38.211-Table 6.3.3.1-7:  Ncs for preamble formats with   


Example : MSG1 from UE Perspective 


RACH Msg1 -> 483/SF# 1/Slot 1 and 

symbols start -0 

Prach Config->10 ,

Preamble Format Value -5, 

Preamble Format -> FORMAT_A1, 

RA Id->46 , 

uroot-24 , 

cyclic Shift ->0 (nCS =0)

RA RNTI-> 127 


SFN mod x=y -> 483 mod2=1->ok

Possible slots are 4,9,14,19,24,29,34,39->SF/Slot=1/9



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