PRACH Configuration — Rural Macro Cell

Airtel is lighting up a rural macro cell to cover a highway stretch outside Jaipur. The cell sits at 3500 MHz (n78) with 30 kHz SCS, TDD duplex, frame pattern DDDSU. Physical cell radius is 22 km — you need preambles that survive the long round-trip delay. Peak load expected: 300 UEs in cell, medium access pressure. One PRACH occasion per 10 ms radio frame is enough budget. A neighbour site (operated by your partner) occupies root-sequence indices 90..140. Your root sequences must sit outside that range with safety margin. Your job: pick the right preamble format, PRACH config index, zero-correlation-zone (NCS), root-sequence index, PRACH frequency offset, and msg1-FDM. Live rule checks will tell you what still violates.