5G • RAN
Fractional Power Control Alpha
Pathloss Compensation Factor Alpha
Weighting factor (0.0 to 1.0) defining the fraction of downlink path loss compensated by the UE.
Technical Explanation
Alpha is an RRC parameter taking values in {0.0, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0}. When alpha = 1.0, the UE performs full path loss compensation, eliminating path loss differences between cell-center and cell-edge UEs. When alpha < 1.0, cell-edge UEs transmit at lower power, mitigating inter-cell uplink interference in dense networks.
Key Functions
- Scales pathloss compensation from 0% (no compensation) to 100% (full)
- Balances cell-edge throughput against inter-cell interference generation
- Configured per BWP and per PUSCH resource set
Specifications
3GPP TS 38.213, TS 38.331
Interfaces
Uu
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