14.1 UE operation

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

When HS-DSCH reception is configured in the system information broadcast, the UE shall after sending the RRC connection request or Cell Update, while not having a valid C-RNTI, monitor the common H-RNTI value on the HS-SCCH.

When the UE detects the common H-RNTI the UE shall receive the corresponding HS-DSCH TTI;

– if after decoding the data, the CRC is correct the UE shall pass the data to MAC-ehs;

– if the UE received MAC-ehs PDU containing CCCH message, the UE passes MAC-ehs PDU to MAC-ehs reordering reassembly function. The UE identity is included in the RRC message;

– if the UE received MAC-ehs PDU containing SRB#1 message the UE passes MAC-ehs PDU to MAC-ehs reordering reassembly function. UE shall decode the U-RNTI in MAC-c header to determine whether the MAC SDU is intended for it.

When the UE has an RRC connection and a valid C-RNTI and H-RNTI, the UE shall monitor the dedicated H-RNTI on the HS-SCCH.

When the UE detects the dedicated H-RNTI value the UE shall receive the corresponding HS-DSCH TTI;

– if after decoding the data, the CRC is correct the UE passes the data to MAC-ehs for reassembly and reordering;

– after MAC-ehs processing the UE passes the complete MAC-ehs SDU directly to the corresponding RLC entity.

For receiving system information change information, the UE shall monitor in addition to the common H-RNTI or the dedicated H-RNTI the BCCH specific H-RNTI on the specific HS-SCCH code indicated in system information broadcast.

When the UE detects the BCCH specific H-RNTI value the UE shall receive the corresponding HS-DSCH TTI;

– if after decoding the data, the CRC is correct the UE passes the data to MAC-ehs.

The UE shall transmit HARQ-ACK information in uplink on HS-DPCCH only when it is transmitting on a common E-DCH resource and "ACK/NACK support on HS-DPCCH" is configured. Along with this, the UE shall transmit CQI information in uplink on HS-DPCCH when "Measurement Feedback Info" is provided. For uplink transmission the UE shall use the common E-DCH if the UE and cell support it, otherwise the UE shall use the RACH.

During the state transition from CELL_FACH to CELL_DCH, if the reconfiguration message does not include new H-RNTI the UE keeps monitoring the HS-SCCH with the H-RNTI value used in CELL_FACH state during the uplink synchronisation procedure, if the uplink synchronization procedure is necessary. The UE shall continue to use the H-RNTI in CELL_DCH state after completing the state transition to CELL_DCH state.