8.5.57 Actions related to SECONDARY_CELL_MIMO_STATUS variable

25.3313GPPProtocol specificationRadio Resource Control (RRC)Release 17TS

If the UE receives an ACTIVE SET UPDATE, CELL UPDATE CONFIRM, or any reconfiguration message which includes the IE "Downlink secondary cell info FDD" for any of the secondary serving HS-DSCH cells, the UE shall:

1> if the IE "Secondary cell MIMO parameters" is not included in the IE "Downlink secondary cell info FDD":

2> clear the corresponding entry in the SECONDARY_CELL_MIMO_PARAMS variable.

1> if the CHOICE "Configuration Info" in the IE "Secondary cell MIMO parameters" has the value "Continue":

2> continue using the stored parameters in the corresponding entry in the SECONDARY_CELL_MIMO_PARAMS variable.

1> otherwise:

2> if the IE "MIMO N_cqi_typeA/M_cqi ratio" is included:

3> store the value of the IE "MIMO N_cqi_typeA/M_cqi ratio" in the corresponding entry in the SECONDARY_CELL_MIMO_PARAMS variable.

2> if the IE "MIMO pilot configuration" is included:

3> store the value of the IE "MIMO pilot configuration" in the corresponding entry in the SECONDARY_CELL_MIMO_PARAMS variable.

2> if the IE "Precoding weight set restriction" is included in the IE "Secondary cell MIMO parameters":

3> store the value of the IE "Precoding weight set restriction" in the corresponding entry in the SECONDARY_CELL_MIMO_PARAMS variable.

2> else if the IE "Precoding weight set restriction" is not included in the IE "Secondary cell MIMO parameters":

3> if the IE "MIMO operation" is included in the IE "MIMO parameters" and it is set to "start":

4> if the IE "Precoding weight set restriction" is included in the IE "MIMO parameters":

5> store the value of the IE "Precoding weight set restriction" in the corresponding entry in the SECONDARY_CELL_MIMO_PARAMS variable.

4> else if the IE "Precoding weight set restriction" is not included in the IE "MIMO parameters":

5> clear the value of the IE "Precoding weight set restriction" in the corresponding entry in the SECONDARY_CELL_MIMO_PARAMS variable.

3> else if the IE "MIMO operation" is included in the IE "MIMO parameters" and it is set to "continue" and if the IE "Precoding weight set restriction"is present in the variable MIMO_PARAMS:

4> copy the value of the IE "Precoding weight set restriction" in the variable MIMO_PARAMS and store it in the IE "Precoding weight set restriction" in the corresponding entry in the SECONDARY_CELL_MIMO_PARAMS variable.

3> else:

4> clear the value of the IE "Precoding weight set restriction" in the corresponding entry in the SECONDARY_CELL_MIMO_PARAMS variable.

2> RRC shall indicate to lower layers whether precoding weight set restriction is configured based on the value of the IE "Precoding weight set restriction" in the variable SECONDARY_CELL_MIMO_PARAMS.

1> determine the value of the SECONDARY_CELL_MIMO_STATUS variable for the corresponding secondary serving HS-DSCH cell.

The SECONDARY_CELL_MIMO_STATUS variable shall be set to TRUE for a secondary serving HS-DSCH cell only when all the following conditions are met:

1> the UE is in CELL_DCH state;

1> the corresponding entry in the variable SECONDARY_CELL_HS_DSCH_RECEPTION is set to TRUE for that secondary serving HS-DSCH cell;

1> if the UE does not support MIMO only with single stream restriction, the corresponding entry in the variable SECONDARY_CELL_MIMO_PARAMS contains a value for the IE "MIMO N_cqi_typeA/M_cqi ratio"; and

1> the corresponding entry in the variable SECONDARY_CELL_MIMO_PARAMS contains a value for the IE "MIMO pilot configuration".

If any of the above conditions is not met and the SECONDARY_CELL_MIMO_STATUS variable is set to TRUE for that secondary serving HS-DSCH cell, the UE shall:

1> set the entry in the SECONDARY_CELL_MIMO_STATUS variable corresponding to that secondary serving HS-DSCH cell to FALSE;

1> clear the entry in the SECONDARY_CELL_MIMO_PARAMS variable corresponding to that secondary serving HS-DSCH cell;

1> trigger lower layers to stop MIMO operation on that secondary serving HS-DSCH cell.

Whenever the entry in the variable SECONDARY_CELL_MIMO_STATUS is set to TRUE for a secondary serving HS-DSCH cell, the UE shall:

1> if the UE supports MIMO only with single stream restriction (FDD only):

2> indicate to lower layers to start operation in MIMO mode restricted to single stream transmission on that secondary serving HS-DSCH cell, using the parameter values stored in the corresponding entry in the variable SECONDARY_CELL_MIMO_PARAMS.

1> else:

2> indicate to lower layers to start operation in MIMO mode on that secondary serving HS-DSCH cell, using the parameter values stored in the corresponding entry in the variable SECONDARY_CELL_MIMO_PARAMS.

1> for FDD, when MIMO only with single stream restriction is configured:

2> if MAC-ehs is not configured:

3> the UE behaviour is undefined.

NOTE: This subclause applies to FDD only.