8.5.25 Actions related to HS_DSCH_RECEPTION variable

25.3313GPPProtocol specificationRadio Resource Control (RRC)Release 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

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

1> for FDD and 1.28 Mcps TDD:

2> the UE is in CELL_DCH state.

1> for 3.84 Mcps TDD or 7.68 Mcps TDD:

2> a dedicated physical channel is allocated to the UE in the uplink.

1> the variable H_RNTI is set;

1> the UE has a stored IE "HS-SCCH info";

1> the UE has a stored IE "HARQ info";

1> for FDD:

2> one of the radio links in the active set is configured as the serving HS-DSCH radio link;

2> the UE has stored the following IEs:

– IE "Measurement Feedback Info";

– IE "Uplink DPCH Power Control Info" including stored _ACK, _NACK and Ack-NACK Repetition factor.

1> for 3.84 Mcps TDD or 7.68 Mcps TDD, the UE has stored the IE "HS-PDSCH Timeslot Configuration" and either of the following conditions are met:

2> a dedicated physical channel is allocated to the UE in the downlink;

2> the UE has stored D_hs-sync.

1> for 1.28 Mcps TDD, the UE has stored the IE "HS-PDSCH Midamble Configuration":

1> there is at least one RB mapped to HS-DSCH;

1> at least for one of the RBs mapped to HS-DSCH, there is either:

2> at least one MAC-hs queue (including the IE "MAC-d PDU size Info") configured for the concerning MAC-d flow; or

2> at least one MAC-ehs reordering queue configured for the associated logical channel.

NOTE 1: In CELL_DCH, to enable or disable HS-DSCH reception, the UTRAN has the possibility to add/remove the concerning HS-DSCH related RB mapping options, add/remove the concerning MAC-d flows or, for FDD, add/remove the concerning MAC-ehs reordering queue, add/remove the serving HS-DSCH radio link or, for TDD add/remove H-RNTI upon hard handover.

NOTE 2: In CELL_DCH, if HS_DSCH_RECEPTION is set to TRUE and a reconfiguration, an inter-RAT handover from UTRAN, or a cell change order procedure is initiated, the UE checks the conditions only when the reconfiguration, inter-RAT handover from UTRAN, or cell change order procedure is successfully completed. Doing so ensures that, in case of failure in the reconfiguration, inter-RAT handover from UTRAN, or cell change order procedure, the UE can return to the old configuration as if the message was not received, e.g. without performing a MAC-HS reset.

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

1> set the variable HS_DSCH_RECEPTION to FALSE;

1> for UE in CELL_DCH:

2> set the variable HS_DSCH_RECEPTION_GENERAL to FALSE;

2> stop any HS-SCCH reception procedures;

2> stop any HS-DSCH reception procedures;

2> clear the variable H_RNTI and remove any stored H-RNTI;

2> reset the MAC-hs/ehs entity [15];

2> release all HARQ resources;

2> no long consider any radio link to be the HS-DSCH serving radio link.

1> for 3.84 Mcps TDD or 7.68 Mcps TDD, if no downlink DPCH is assigned the UE shall clear the uplink DPCH configuration and initiate the Cell Update procedure according to subclause 8.3.1, cause "radio link failure".

NOTE 3: If configured for HS-DSCH and not explicitly indicated as being cleared, the UE will have still stored the IEs "HARQ info", "Added or Reconfigured MAC-d flow", "Added or Reconfigured MAC-ehs reordering queue", "RB mapping Info", "Downlink HS-PDSCH information" and "Downlink secondary cell info FDD".

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

1> set the variable HS_DSCH_RECEPTION_GENERAL to TRUE;

1> perform HS-SCCH reception procedures according to the stored HS-SCCH configuration as stated in:

2> subclause 8.6.6.33 for the IE "HS-SCCH Info".

2> for 1.28 Mcps TDD, when performing reception on signalling radio bearer before RAB has been established,

3> if MAC-ehs is not configured,

4> use the table of transport block size for the HS-DSCH physical layer category 1 as specified in [15], and consider the UE capability "Total number of soft channel bits in HS-DSCH" equal to that of the HS-DSCH physical layer category 1 as specified in [35].

3> else,

4> use the table of transport block size for the HS-DSCH physical layer category 9 as specified in [15], and consider the UE capability "Total number of soft channel bits in HS-DSCH" equal to that of the HS-DSCH physical layer category 9 as specified in [35].

NOTE 4: For 1.28 Mcps TDD, when performing transmission on signalling radio bearer before RAB has been established, UTRAN should use the same rules with the UE as descibed above, when performing scheduling and signalling the control information on HS-SCCH, as it is not possible for Node B to be aware of the UE’s HSDPA capability category during this period.

1> perform HS-DSCH reception procedures according to the stored HS-PDSCH configuration as stated in:

2> subclause 8.6.3.1b for the IE "H-RNTI";

2> subclause 8.6.5.6b for the IE "HARQ info";

2> subclause 8.6.6.34 for the IE "Measurement Feedback Info".

1> use the relevant CQI reporting table as stated in subclause 8.5.44.

In CELL_DCH, whenever the variable HS_DSCH_RECEPTION is set to FALSE, the UE shall:

1> not perform HS-SCCH reception procedures;

1> not perform HS-DSCH reception procedures.

For FDD and CELL_DCH state, determine the value for the SECONDARY_CELL_HS_DSCH_RECEPTION variable and take the corresponding actions as described in subclause 8.5.51.