A.5 Example implementation of closed loop uplink HS-SICH power control in Node B for 1.28Mcps TDD

25.2243GPPPhysical layer procedures (TDD)TS

If the UE is not configured in MIMO mode, uplink power control is based on a quality target and a power offset, set by higher layers. An example implementation for a Node B TPC calculation algorithm is SIR based (HS-SICH SIR Target). In this algorithm, if an ACK is decoded from HS-SICH, the Node B shall adjust the measured value of HS-SICH with a power offset. When the (adjusted) measured value is higher than the target SIR value, TPC command = "down". When the (adjusted) measurement is lower than or equal to the target SIR, TPC command = "up"

If the UE is configured in MIMO mode, uplink power control is based on a quality target and a power offset, set by higher layers. An example implementation for a Node B TPC calculation algorithm is SIR based (HS-SICH SIR Target). In this algorithm, if an ACK is decoded from HS-SICH for single stream transmission or two ACKs are decoded from HS-SICH for dual stream transmission, the Node B shall adjust the measured value of HS-SICH with a power offset. When the (adjusted) measured value is higher than the target SIR value, TPC command = "down". When the (adjusted) measurement is lower than or equal to the target SIR, TPC command = "up".

Annex B (informative):
Determination of weight information

Selective Transmit Diversity (STD) and Transmit Adaptive Antennas (TxAA) are examples of transmit diversity schemes for dedicated physical channels.