7 FR2 MIMO OTA requirements
38.1513GPPNRRelease 17TSUser Equipment (UE) Multiple Input Multiple Output (MIMO) Over-the-Air (OTA) performance requirements
7.1 General
7.1.1 MIMO Average Spherical Coverage (MASC)
The MIMO Average Spherical Coverage (MASC) is the Figure of Merit of FR2 MIMO OTA requirement. FR2 MIMO OTA is measured with 36 constant-density points within the 3D sphere. The MASC is determined by the averaging of the best 18 sensitivity values for power class 3 UE. The averaging shall be done in linear scale for the MASC result according to the formula:
Such that {P70,1, …, P70,18} are the best 18 sensitivity values from all the 36 constant density measurement points, as defined in Annex B.2.3.
The MASC shall be measured at the mid channel as specified in TS 38.508-1 subclause 4.3.1 [7]. The MASC shall be lower than the requirements specified in Clause 7.2.
For FR2 MIMO OTA, PRS-EPRE-MAX, i.e., the maximum downlink RS-EPRE supported by the test system, is defined as [-79.1dBm/120kHz].
If the number of test points where the UE can meet 70% maximum throughput outage even under maximum downlink power condition (i.e., [-79.1dBm/120kHz]) is less than [18], then UE fails the test.
Other criteria for FR2 are FFS.
7.2 Minimum requirement
FR2 MASC minimum performance requirements for power class 3 NR handheld UEs in free space and the primary mechanical mode for averaging of the best 18 sensitivity values for 70% DL throughput with the corresponding measurement configurations (i.e., channel model and gNB configuration) specified in Annex D.1 and Annex E.2 are defined in Table 7.2-1.
Table 7.2-1: FR2 MASC minimum performance requirements for NR handheld UEs in free space and the primary mechanical mode
|
NR bands |
Bandwidth (MHz) |
MIMO layer |
Channel model |
Reference channel |
MASC70 [dBm/120kHz] |
|
n257 |
100 |
2×2 |
FR2 UMi CDL-C |
R.PDSCH.5-2.2 TDD |
TBD |
|
n258 |
100 |
2×2 |
FR2 UMi CDL-C |
R.PDSCH.5-2.2 TDD |
TBD |
|
n260 |
100 |
2×2 |
FR2 UMi CDL-C |
R.PDSCH.5-2.2 TDD |
TBD |
|
n261 |
100 |
2×2 |
FR2 UMi CDL-C |
R.PDSCH.5-2.2 TDD |
TBD |
Annex A (normative):
<FR1 Test methodology>