• Serving E-NodeB monitors link quality and takes into account the overload indicators (over X2) from neighbor cells.
• Serving E-NodeB sends Transmit Power Control commands (TPC) as part of Downlink Control Information (DCI) on PDCCH.
• UE adjusts transmit power levels of PUCCH or PUSCH.
• Go back to 1.
Single Serving Cell No Soft Handover No Macro-diversity]
PUCCH Physical Uplink Control Channel
PUSCH Physical Uplink Shared Channel
PDCCH Physical Downlink Control Channel
E-UTRA Uplink Closed Loop Power Control
Uplink power control determines the average power over a DFT-SOFDM symbol in which the
physical channel is transmitted.
Uplink power control controls the transmit power of the different Uplink physical channels.
A cell wide overload indicator (OI) is exchanged over X2 for inter-cell power control.
DCI format 0 provides two bits of TPC command for PUSCH.
DCI format 1, 1a and 2 provides two bits of TPC command for PUCCH.
DCI format 3 is used for the transmission of TPC commands for PUCCH and PUSCH with 2-bit
power adjustments.
DCI format 3A is used for the transmission of TPC commands for PUCCH and PUSCH with single
bit power adjustments.