8.5.35 Actions related to HS_SCCH_LESS_STATUS variable (FDD only)

25.3313GPPProtocol specificationRadio Resource Control (RRC)Release 17TS

If the UE receives RRC CONNECTION SETUP, ACTIVE SET UPDATE, CELL UPDATE CONFIRM, or any reconfiguration message;

1> the UE shall determine the value for the HS_SCCH_LESS_STATUS variable.

The variable HS_SCCH_LESS_STATUS shall be set to TRUE only when all the following conditions are met:

1> the UE is in CELL_DCH state;

1> the variable HS_DSCH_RECEPTION is set to TRUE;

1> no DPDCH is present in uplink and F-DPCH is configured in downlink;

1> the UE is not configured in MIMO mode;

1> the UE is not configured in MIMO mode with four transmit antennas;

1> the variable HS_SCCH_LESS_PARAMS is set;

1> the IE "HS-SCCH less information" is included in the received message.

If any of the above conditions is not met and the variable HS_SCCH_LESS_STATUS is set to TRUE the UE shall:

1> set the variable HS_SCCH_LESS_STATUS to FALSE;

1> clear the variable HS_SCCH_LESS_PARAMS;

1> stop all HS-SCCH less related activities.

If variable HS_SCCH_LESS_STATUS is set to TRUE and the serving HS-DSCH cell was changed as a result of the received message or HS-SCCH order from the target cell, the UE shall instruct the physical layer to consider that the HS-SCCH orders from the serving cell were never received.

If the variable HS_SCCH_LESS_STATUS is set to TRUE, the value of IE "HS-SCCH less information" included in the message is not "Continue HS-SCCH less operation" and the serving HS-DSCH cell was not changed as a result of the received message, the UE shall instruct the physical layer to consider that the HS-SCCH less related HS-SCCH orders were never received.

If the variable HS_SCCH_LESS_STATUS is set to TRUE, the value of IE "HS-SCCH less information" included in the message is "Continue HS-SCCH less operation" and the serving HS-DSCH cell was not changed as a result of the received message, the UE shall instruct the physical layer to consider that the HS-SCCH less related HS-SCCH orders were received.

Whenever the variable HS_SCCH_LESS_STATUS is set to TRUE, the UE shall:

1> configure the physical and MAC layers to operate according to the HS_SCCH_LESS_PARAMS;

1> configure the physical layer to use a virtual IR buffer size of at least 4536 bits for HS-SCCH less HS-DSCH transmissions.