7.1.8 Reporting of Rank Indicator (RI)

36.523-13GPPEvolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Packet Core (EPC)Part 1: Protocol conformance specificationRelease 17TSUser Equipment (UE) conformance specification

7.1.8.1 Periodic RI reporting using PUCCH / UE only supports 1 layer for spatial multiplexing in DL / Transmission mode 3/4

7.1.8.1.1 Test Purpose (TP)

(1)

with { UE in E-UTRA RRC_CONNECTED state }

ensure that {

when { UE only supports 1 layer for spatial multiplexing in DL is configured to transmission mode 3}

then { UE always reports RI equals to 1}

}

(2)

with { UE in E-UTRA RRC_CONNECTED state }

ensure that {

when { UE only supports 1 layer for spatial multiplexing in DL is configured to transmission mode 4}

then { UE always reports RI equals to 1}

}

7.1.8.1.2 Conformance requirements

References: The conformance requirements covered in the present TC are specified in: TS 36.306 clause 4, 4.1 and clause 4.1 A, TS 36.213 clause 7.2.2.

[TS 36.306, clause 4]

The following subclauses define the UE radio access capability parameters. Only parameters for which there is the possibility for UEs to signal different values are considered as UE radio access capability parameters. Therefore, mandatory capabilities that are the same for all UEs are not listed here.

[TS 36.306, clause 4.1]

The field ue-Category defines a combined uplink and downlink capability. The parameters set by the UE Category are defined in subclause 4.2. Tables 4.1-1 and 4.1-2 define the downlink and, respectively, uplink physical layer parameter values for each UE Category.

Table 4.1-1: Downlink physical layer parameter values set by the field ue-Category

UE Category

Maximum number of DL-SCH transport block bits received within a TTI

Maximum number of bits of a DL-SCH transport block received within a TTI

Total number of soft channel bits

Maximum number of supported layers for spatial multiplexing in DL

Category 1

10296

10296

250368

1

Category 2

51024

51024

1237248

2

Category 3

102048

75376

1237248

2

Category 4

150752

75376

1827072

2

Category 5

299552

149776

3667200

4

Category 6

301504

149776 (4 layers, 64QAM)

75376 (2 layers, 64QAM)

3654144

2 or 4

Category 7

301504

149776 (4 layers, 64QAM)

75376 (2 layers, 64QAM)

3654144

2 or 4

Category 8

2998560

299856

35982720

8

Category 9

452256

149776 (4 layers, 64QAM)

75376 (2 layers, 64QAM)

5481216

2 or 4

Category 10

452256

149776 (4 layers, 64QAM)

75376 (2 layers, 64QAM)

5481216

2 or 4

Category 11

603008

149776 (4 layers, 64QAM)

195816 (4 layers, 256QAM)

75376 (2 layers, 64QAM)

97896 (2 layers, 256QAM)

7308288

2 or 4

Category 12

603008

149776 (4 layers, 64QAM)

195816 (4 layers, 256QAM)

75376 (2 layers, 64QAM)

97896 (2 layers, 256QAM)

7308288

2 or 4

NOTE 1: In carrier aggregation operation, the DL-SCH processing capability can be shared by the UE with that of MCH received from a serving cell. If the total eNB scheduling for DL-SCH and an MCH in one serving cell at a given TTI is larger than the defined processing capability, the prioritization between DL-SCH and MCH is left up to UE implementation.

[TS 36.306, clause 4.1A]

The fields ue-CategoryDL and ue-CategoryUL define downlink/uplink capability respectively. The parameters set by the UE DL/UL Categories are defined in subclause 4.2. Tables 4.1A-1 and 4.1A-2 define the downlink and, respectively, uplink physical layer parameter values for each UE DL/UL Category Table 4.1A-4 defines the minimum capability for the maximum number of bits of a MCH transport block received within a TTI for an MBMS capable UE. Table 4.1A-6 defines the only combinations for UE UL and DL Categories that are allowed to be signalled with ue-CategoryDL and ue-CategoryUL. Table 4.1A-6 also defines which UE Categories a UE shall indicate in addition to the combinations for UE UL and DL Categories.

Table 4.1A-1: Downlink physical layer parameter values set by the field ue-CategoryDL

UE DL Category

Maximum number of DL-SCH transport block bits received within a TTI (Note 1)

Maximum number of bits of a DL-SCH transport block received within a TTI

Total number of soft channel bits

Maximum number of supported layers for spatial multiplexing in DL

DL Category M1

1000

1000

25344

1

DL Category 0 (Note 2)

1000

1000

25344

1

DL Category 6

301504

149776 (4 layers, 64QAM)

75376 (2 layers, 64QAM)

3654144

2 or 4

DL Category 7

301504

149776 (4 layers, 64QAM)

75376 (2 layers, 64QAM)

3654144

2 or 4

DL Category 9

452256

149776 (4 layers, 64QAM)

75376 (2 layers, 64QAM)

5481216

2 or 4

DL Category 10

452256

149776 (4 layers, 64QAM)

75376 (2 layers, 64QAM)

5481216

2 or 4

DL Category 11

603008

149776 (4 layers, 64QAM)

195816 (4 layers, 256QAM)

75376 (2 layers, 64QAM)

97896 (2 layers, 256QAM)

7308288

2 or 4

DL Category 12

603008

149776 (4 layers, 64QAM)

195816 (4 layers, 256QAM)

75376 (2 layers, 64QAM)

97896 (2 layers, 256QAM)

7308288

2 or 4

DL Category 13

391632

195816 (4 layers, 256QAM)

97896 (2 layers, 256QAM)

3654144

2 or 4

DL Category 14

3916560

391656 (8 layers, 256QAM)

47431680

8

DL Category 15

749856-798800 (Note 3)

149776 (4 layers, 64QAM)

195816 (4 layers, 256QAM)

75376 (2 layers, 64QAM)

97896 (2 layers, 256QAM)

9744384

2 or 4

DL Category 16

978960 -1051360 (Note 3)

149776 (4 layers, 64QAM)

195816 (4 layers, 256QAM)

75376 (2 layers, 64QAM)

97896 (2 layers, 256QAM)

12789504

2 or 4

DL Category 17

25065984

391656 (8 layers, 256QAM)

303562752

8

DL Category 18

1174752-1206016 (Note 3)

[299856 (8 layers, 64QAM)

391656 (8 layers, 256QAM)]

149776 (4 layers, 64QAM)

195816 (4 layers, 256QAM)

75376 (2 layers, 64QAM)

97896 (2 layers, 256QAM)

14616576

2 or 4 [or 8]

DL Category 19

1566336 -1658272 (Note 3)

[299856 (8 layers, 64QAM)

391656 (8 layers, 256QAM)]

149776 (4 layers, 64QAM)

195816 (4 layers, 256QAM)

75376 (2 layers, 64QAM)

97896 (2 layers, 256QAM)

19488768

2 or 4 [or 8]

NOTE 1: In carrier aggregation operation, the DL-SCH processing capability can be shared by the UE with that of MCH received from a serving cell. If the total eNB scheduling for DL-SCH and an MCH in one serving cell at a given TTI is larger than the defined processing capability, the prioritization between DL-SCH and MCH is left up to UE implementation.

NOTE 2: Within one TTI, a UE indicating category 0 shall be able to receive up to 1000 bits for a transport block associated with C-RNTI/Semi-Persistent Scheduling C-RNTI/P-RNTI/SI-RNTI/RA-RNTI and up to 2216 bits for another transport block associated with P-RNTI/SI-RNTI/RA-RNTI.

NOTE 3: The UE indicating category x shall reach the value within the defined range indicated by “Maximum number of DL-SCH transport block bits received within a TTI” of category x. The UE shall determine the required value within the defined range indicated by “Maximum number of DL-SCH transport block bits received within a TTI” of the corresponding category, based on its capabilities (i.e. CA band combination, MIMO, Modulation scheme).

[TS 36.213, clause 7.2.2]

A UE is semi-statically configured by higher layers to periodically feed back different CQI, PMI, and RI on the PUCCH using the reporting modes given in Table 7.2.2-1 and described below.

Table 7.2.2-1: CQI and PMI Feedback Types for PUCCH reporting Modes

PMI Feedback Type

No PMI

Single PMI

PUCCH CQI Feed-back Type

Wideband

Mode 1-0

Mode 1-1

(wideband CQI)

UE Selected

Mode 2-0

Mode 2-1

(subband CQI)

For each of the transmission modes defined in Section 7.1, the following reporting modes are supported on PUCCH:

– Transmission mode 1 : Modes 1-0, 2-0

– Transmission mode 2 : Modes 1-0, 2-0

– Transmission mode 3 : Modes 1-0, 2-0

– Transmission mode 4 : Modes 1-1, 2-1

– Transmission mode 5 : Modes 1-1, 2-1

– Transmission mode 6 : Modes 1-1, 2-1

– Transmission mode 7 : Modes 1-0, 2-0

– Transmission mode 8 : Modes 1-1, 2-1 if the UE is configured with PMI/RI reporting; modes 1-0, 2-0 if the UE is configured without PMI/RI reporting

Four CQI/PMI and RI reporting types with distinct periods and offsets are supported for each PUCCH reporting mode as given in Table 7.2.2-3:

– Type 1 report supports CQI feedback for the UE selected sub-bands

– Type 2 report supports wideband CQI and PMI feedback.

– Type 3 report supports RI feedback

– Type 4 report supports wideband CQI

The periodicity (in subframes) and offset (in subframes) for CQI/PMI reporting are determined based on the parameter cqi-pmi-ConfigIndex () given in Table 7.2.2-1A for FDD and table 7.2.2-1C for TDD. The periodicity and relative offset for RI reporting are determined based on the parameter ri-ConfigIndex () given in Table 7.2.2-1B. Both cqi-pmi-ConfigIndex and ri-ConfigIndex are configured by higher layer signalling. The relative reporting offset for RI takes values from the set

– Wideband feedback

– Mode 1-1 description:

– In the subframe where RI is reported (only for transmission mode 4 and transmission mode 8):

– A UE shall determine a RI assuming transmission on set S subbands.

– The UE shall report a type 3 report consisting of one RI

– In the subframe where CQI/PMI is reported:

– A single precoding matrix is selected from the codebook subset assuming transmission on set S subbands

– A UE shall report a type 2 report on each respective successive reporting opportunity consisting of

– A single wideband CQI value which is calculated assuming the use of a single precoding matrix in all subbands and transmission on set S subbands.

– The selected single precoding matrix indicator (wideband PMI)

– When RI>1, a 3-bit wideband spatial differential CQI, which is shown in Table 7.2-2.

– For transmission mode 4 and transmission mode 8, the PMI and CQI are calculated conditioned on the last reported periodic RI. For other transmission modes they are calculated conditioned on transmission rank 1.

7.1.8.1.3 Test description

7.1.8.1.3.1 Pre-test conditions

System Simulator:

  • Cell 1
  • System Simulator transmits according to the rank reported by UE

UE:

None.

Preamble:

– The UE is in state Generic RB Established (state 3) according to [18]

7.1.8.1.3.2 Test procedure sequence

Table 7.1.8.1.3.2-1: Main behaviour

St

Procedure

Message Sequence

TP

Verdict

U – S

Message

–

EXCEPTION: Step 1 is repeated 5 times

–

–

–

–

1

CHECK: Does the UE transmit a PUCCH type 3 report with RI set to 1? (NOTE)

–>

(RI)

1

P

2

The SS transmits a MAC PDU containing an RRCConnectionReconfiguration message to reconfigure the UE transmission mode to tm4

<–

MAC PDU

(RRCConnectionReconfiguration)

–

–

3

The UE transmits a MAC PDU containing an RRCConnectionReconfigurationComplete message

–>

MAC PDU

(RRCConnectionReconfigurationComplete)

–

–

–

EXCEPTION: Step 4 is repeated 5 times

–

–

–

–

4

CHECK: Does the UE transmit PUCCH type 3 report with RI set to 1? (NOTE)

–>

(RI)

2

P

5

Check: Does the test result of CALL generic procedure in TS 36.508 subclause 6.4.2.3 indicate that UE is in E-UTRA RRC_CONNECTED state?

–

–

2

–

Note: In this test case, it is configured for wideband CQI/PMI reporting for transmission mode tm3 and tm4, the reporting instances of RI reporting are subframes satisfying: the default configuration in TS 36.508, the cqi-pmi-ConfigIndex() = 25(FDD)/24(TDD), ri-ConfigIndex() = 483(FDD) / 484(TDD), as per the Table 7.2.2-1A, 7.2.2-1B and 7.2.2-1C in TS 36.213, the periodicity (in subframes) = 20ms(FDD) / 20ms(TDD), (in subframes) = 8ms(FDD) / 8ms(TDD), The periodicity = 8(FDD) / 8(TDD) and relative offset = 0(FDD) / -1(TDD)

7.1.8.1.3.3 Specific message contents

Table 7.1.8.1.3.3-1: RRCConnectionReconfiguration (step 2, Table 7.1.8.1.3.2-1)

Derivation Path: 36.508 table 4.6.1-8, condition SRB2-DRB(1, 0)

Table 7.1.8.1.3.3-2: PhysicalConfigDedicated-DEFAULT (step 2, Table 7.1.8.1.3.2-1)

Derivation Path: 36.331 clause 6.3.2

Information Element

Value/remark

Comment

Condition

PhysicalConfigDedicated-DEFAULT ::= SEQUENCE {

antennaInfo CHOICE {

defaultValue

NULL

explicitValue SEQUENCE {

2TX

transmissionMode

tm4

codebookSubsetRestriction CHOICE {

n2TxAntenna-tm4

‘111111’

BIT STRING (SIZE (6))

}

ue-TransmitAntennaSelection CHOICE {

Release

NULL

}

}

}

}