B.2.3 Test procedure
38.1513GPPNRRelease 17TSUser Equipment (UE) Multiple Input Multiple Output (MIMO) Over-the-Air (OTA) performance requirements
Before throughput testing, the initial conditions shall be confirmed to reach the correct measurement state for each test case.
1. Ensure environmental requirements of Annex F are met.
2. Configure the test system according to Annex E.2 and Annex D.1 for the applicable test case.
3. Verify the implementation of the channel model as specified in Annex D.3.
4. Position the UE in the chamber according to Annex B.3.
5. Power on the UE.
6. Set up the connection.
Note: For step 3, the verification of the channel model implementation is usually performed once for each channel model as part of the laboratory accreditation process, and will remain valid as long as the setup and instruments remain unchanged. Otherwise the channel model validation may need to be performed prior to starting each throughput test.
For throughput testing, the following steps shall be followed in order to evaluate FR2 MIMO OTA performance of the DUT:
1. Position the DUT in the default P0 alignment option (Orientation 1), as defined in Annex A.3 in TR38.827 [2].
2. Measure MIMO OTA throughput, the maximum downlink power is TBD. MIMO OTA throughput is the minimum downlink signal power resulting in a pre-defined throughput value (70%) of the maximum theoretical throughput. The downlink signal power step size shall be no more than 0.5 dB when RF power level is near the NR MIMO sensitivity level.
3. Rotate the UE to the next test point. Table B.2.3-1 lists 36 evenly spaced test points determined using the charged particle approach and with test point #1 centred at (0,0).
4. Repeat the test from step 2 for each specified test point. If the re-positioning concept is applied, the device needs to be positioned in P0 Orientation 2 (either option 1 or option 2).
5. The postprocessing method and the performance metric are defined in Clause 7.1.
Note: For step 2 of throughput testing, the measurement is not needed to start from maximum downlink power each time. To save testing time, the starting downlink power can be set as a proper value (lower than maximum downlink power supported by test system) as long as the throughput curve can reach at least 70% of the maximum theoretical throughput.
Table B.2.3-1. Evenly spaced FR2 test points with a constant density
|
Test Point Number |
Theta [deg] |
Phi [deg] |
|
1 |
0.0 |
0.0 |
|
2 |
33.5 |
139.7 |
|
3 |
33.9 |
49.7 |
|
4 |
35.5 |
-142.9 |
|
5 |
35.5 |
-76.9 |
|
6 |
37.6 |
-17.2 |
|
7 |
52.3 |
94.7 |
|
8 |
56.9 |
175.7 |
|
9 |
62.5 |
20.4 |
|
10 |
63.7 |
-99.8 |
|
11 |
67.1 |
-55.0 |
|
12 |
69.3 |
-139.5 |
|
13 |
69.5 |
130.1 |
|
14 |
70.3 |
60.8 |
|
15 |
72.1 |
-16.2 |
|
16 |
88.7 |
-167.5 |
|
17 |
88.7 |
98.5 |
|
18 |
89.3 |
157.0 |
|
19 |
93.9 |
-78.9 |
|
20 |
94.6 |
31.6 |
|
21 |
95.3 |
-115.6 |
|
22 |
99.6 |
-38.3 |
|
23 |
103.8 |
-1.1 |
|
24 |
104.4 |
66.3 |
|
25 |
110.1 |
127.5 |
|
26 |
115.1 |
-145.6 |
|
27 |
120.8 |
171.9 |
|
28 |
125.3 |
-60.7 |
|
29 |
128.2 |
-104.1 |
|
30 |
128.8 |
91.3 |
|
31 |
129.9 |
35.8 |
|
32 |
136.0 |
-13.4 |
|
33 |
145.8 |
138.1 |
|
34 |
150.2 |
-153.3 |
|
35 |
160.6 |
-67.4 |
|
36 |
161.7 |
59.1 |