9.3.5 MIMO only with single-stream restriction Performance
25.1013GPPRelease 17TSUser Equipment (UE) radio transmission and reception (FDD)
9.3.5.1 MIMO only with single-stream restriction Fading Conditions
The propagation conditions assumed for minimum performance requirements of CQI reporting under MIMO single stream conditions are defined in subclause B.2.6.1. The precoding used at the transmitter is one randomly picked but fixed precoding vector for single transport block transmission out of the set of possible precoding vectors as defined in [8]. The same precoding vector shall be used to generate the resulting channel coefficients as described for MIMO single stream conditions in subclause B.2.6.1.
The reporting accuracy of CQI under MIMO with single-stream restriction is determined by the BLER performance when transmitting with a transport format indicated by the reported CQI median determined over all CQI reports that were reported together with PCI reports matching the precoding vector embedded in the propagation channel as defined in subclause B.2.6.1.
9.3.5.1.1 Minimum Requirement
For the parameters specified in Table 9.49E1, and using the downlink physical channels specified in Table C.9 and Table C.12D, the requirements are specified in terms of maximum BLERs at particular reported CQIs when transmitting a fixed transport format given by the CQI median as shown in Table 9.4E2. The CQI median shall be determined over all CQI reports that were reported together with PCI reports matching the precoding vector embedded in the propagation channel as defined in subclause B.2.6.1. The BLER at a particular reported CQI is obtained by associating a particular CQI reference measurement period for all Type B CQI reports that were reported together with PCI reports matching the precoding vector embedded in the propagation channel as defined in subclause B.2.6.1with the HS-PDSCH subframe overlapping with the end of this CQI reference measurement period and calculating the fraction of erroneous HS-PDSCH subframes to which the same CQI value was associated.
Table 9.49E1: Test Parameters for CQI test in MIMO single stream fading conditions
|
Parameter |
Unit |
Test 1 |
Test 2 |
|
HS-PDSCH |
dB |
-2 |
-2.23 |
|
|
dB |
6 |
|
|
|
dBm/3.84 MHz |
-60 |
|
|
Phase reference |
– |
P-CPICH (Table C.9) |
P-CPICH/S-CPICH (Table C.12D) |
|
HS-SCCH_1 |
dB |
-15 (using STTD) |
-15 (without STTD) |
|
DPCH |
dB |
-10 (using STTD) |
-10 (without STTD) |
|
Precoding weight set restriction |
– |
Disabled |
Enabled |
|
Maximum number of H-ARQ transmission |
– |
1 |
|
|
Number of HS-SCCH set to be monitored |
– |
1 |
|
|
CQI feedback cycle |
ms |
2 |
|
|
CQI repetition factor |
– |
1 |
|
|
PCI/CQI reporting Error Rate |
% |
0 |
|
|
HS-SCCH-1 signalling pattern |
– |
To incorporate inter-TTI=3 the six sub-frame HS-SCCH-1 signalling pattern shall be “…XOOXOO…”, where “X” indicates TTI in which the HS-SCCH-1 uses the identity of the UE under test, and “O” indicates TTI in which the HS-SCCH-1 uses a different UE identity. |
|
|
Propagation Channel |
MIMO single stream fading conditions |
||
|
Note 1: Measurement power offset “Γ” is configured by RRC accordingly and as defined in [7]. Note 2: TF for HS-PDSCH is configured according to the reported CQI statistics. TF based on median CQI over all Type B CQI reports that were reported together with PCI reports matching the precoding vector embedded in the propagation channel as defined in subclause B.2.6.1is used. Other physical channel parameters are configured according to the CQI mapping table described in TS25.214. The precoding that shall be used in the transmitter is one randomly picked but fixed precoding vector for single transport block transmission out of the set of possible precoding vectors as defined in [8]. The same precoding vector shall be used to generate the resulting channel coefficients as described for MIMO single stream conditions in subclause B.2.6.1. Note 3: HS-PDSCH Ec/Ior is decreased according to reference power adjustment Δ described in TS 25.214. Note 4: For any given transport format the power of the HS-SCCH and HS-PDSCH shall be transmitted continuously with constant power. |
|||
Table 9.49E2: Minimum requirement for CQI test in MIMO single stream conditions
|
Reported CQI |
Maximum BLER |
|
|
Test 1 |
Test 2 |
|
|
CQI median |
60% |
60% |
|
CQI median + 3 |
15% |
15% |