14.2 Initial link adaptation

25.3083GPPHigh Speed Downlink Packet Access (HSDPA)Overall descriptionRelease 17Stage 2TS

The UE includes available, i.e. UE does not delay reporting due to performing measurements, measurement results on RACH to uplink RRC messages based on configuration parameters set in SIB11/12. The UE includes the measurement results on RACH in Cell Update message when performing Cell update procedure. If UE has valid C-RNTI and H-RNTI the UE sends the Measurement Report message on SRB#2.

The HS-DSCH data frame header includes a "RACH Measurement Result" field to which the RNC can include the received measurement results on RACH. The Node B HS-DSCH scheduler can use this information to determine the MCS and DL transmit power for the HS-SCCH and HS-PDSCH transmissions.

Figure 14.2-1: Link adaptation based on measurement results on RACH