PRB

Technical Explanation

A Physical Resource Block (PRB) spans 12 consecutive subcarriers in the frequency domain (180 kHz at 15 kHz SCS, 360 kHz at 30 kHz SCS). PRBs are numbered from 0 to N_BWP_size - 1 within an active BWP. The gNodeB allocates data channels (PDSCH and PUSCH) in integer multiples of PRBs.

Key Functions

• Consists of 12 consecutive subcarriers in frequency domain
• Acts as the standard granular unit for resource allocation in DCI
• Numbered locally within each configured Bandwidth Part (BWP)