5G • RAN
PRACH Format 1
Long Preamble Format 1
Long preamble format spanning 3 subframes (3 ms) with extended cyclic prefix for massive cell coverage up to 100 km.
Technical Explanation
Format 1 utilizes an extended cyclic prefix of 21024 Ts and sequence duration of 2 x 24576 Ts across 3 consecutive subframes. Its extremely large guard time allows random access from UEs located up to 100 km away, making it ideal for rural, coastal, and offshore maritime deployments.
Key Functions
- Provides extreme cell coverage radii up to 100 km
- Uses repeated sequence and extended cyclic prefix across 3 ms
- Designed for rural macro cells, maritime, and non-terrestrial deployments
Specifications
3GPP TS 38.211
Interfaces
Uu
Related 5G Concepts
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