Configure Physical Random Access Channel (PRACH) parameters
Preamble Format Parameters (Clause 6.3.3.1)
PRACH Format:A1
Sequence Length (L_RA):139
Preamble Duration:0.2857 ms
Number of Symbols:2
Preamble SCS:60 kHz
Guard Time:0.0143 ms
Preamble Sequences (Clause 6.3.3.1)
Zero Correlation Zone (N_CS):419
Preambles per Root:0
Total Preambles:0
Restricted Set:unrestricted
Selected Preamble:0
Frequency Resources (Clause 6.3.3.2)
PRACH Bandwidth:12 RBs
msg1-FrequencyStart:0 RBs
FDM Index:0
PRACH Frequency Offset:0 RBs
0 RBCarrier Bandwidth100 RB
PRACH (msg1-FreqStart)
Time Resources (Clause 8.1)
Subframe Number:0
Slot Number:0
Starting Symbol:0
Slot Duration:0.5000 ms
Symbol Duration:0.0357 ms
Preamble Start Time:0.0000 ms
012345678910111213
OFDM Symbols in Slot
RA-RNTI Calculation (TS 38.321 § 5.1.3)
RA-RNTI:1
Formula: 1 + s_id + 14×t_id + 14×80×f_id
s_id (symbol index) = 0
t_id (slot index) = 0
f_id (frequency index) = 0
ul_carrier_id = 0 (normal UL)
RA-RNTI = 1 + 0 + 14×0 + 14×80×0 = 1
Coverage Analysis
Guard Time:0.0143 ms
Max Round-Trip Time:0.0143 ms
Maximum Cell Radius:2143.52 km
3GPP Standards Reference
- TS 38.211 § 6.3.3: Random access preamble structure and generation
- TS 38.213 § 8.1: PRACH occasion configuration and mapping
- TS 38.321 § 5.1.3: RA-RNTI calculation for random access response
- TS 38.104: Base station radio transmission and reception