H.1 Procedure for finding UE direction

38.521-43GPPNRPart 4: PerformanceRadio transmission and receptionRelease 17TSUser Equipment (UE) conformance specification

This section provides example approaches for finding the UE direction for Demod and CSI tests. Other approaches satisfying the normative criteria listed in H.0 are not precluded.

Default approach is as defined in H.1.2.

H.1.1 Using Rx beam peak direction search

1. For Rx beam peak direction search, please refer to procedure defined in Annex K.1.2/K.3.2 of TS 38.521-2 [8].

2. Run wireless cable mode isolation procedure as defined in H.2.

3. Ensure UE reported rank is higher or same as intended rank for a given test.

H.1.2 RSRPB based scan with fallback option to Rx beam peak direction search

1. Enable periodic RSRPB reporting from the UE.

2. Set of grid points for the UE scan can be user defined set or entire sphere.

3. For each grid point, record RSRPB first by connecting SS to the DUT through the measurement antenna with Pol_Link=  polarization to form the Rx beam towards the measurement antenna and similarly for Pol_Link=  polarization.

4. Wait for BEAM_SELECT_WAIT_TIME before recording the RSRPB reports.

5. Once the grid points scan is completed, sort the grid points based on the linear sum of 4 RSRPB values (2 each for  and  polarization).

6. For the top [10] grid points, run the REFSENS throughput test as per the test condition defined in 38.521-2 clause 7.3.2

7. Grid points that pass the REFSENS throughput test are the potential UE direction to be used for running the tests.

8. If no grid points found in step 7, fall back to using H.1.1.

9. For running rank1 tests,

a. Pick any of the grid points obtained in step 7.

b. Run the wireless cable isolation procedure defined in H.2.

c. Exit the procedure.

10. For running rank2 tests,

a. Pick a grid point obtained in step 7.

b. Run the wireless cable mode isolation procedure defined in H.2.

c. If the grid point satisfies the minimum isolation, proceed to RI check.

Enable RI reporting from UE. If the UE reported rank = 2, exit the procedure.

If UE reported rank is not equal to 2, move to the next grid from step 7 and run step 10.

d. If no grid point meets the criteria in step 7 and step 10c, fallback to using H.1.1.

H.1.3 Isolation based scan with fallback option to Rx beam peak direction search

1. Enable periodic RSRPB reporting from the UE.

2. Set of grid points for the UE scan can be user defined set or entire sphere.

3. For each grid point, record RSRPB first by connecting SS to the DUT through the measurement antenna with Pol_Link=  polarization to form the Rx beam towards the measurement antenna and similarly for Pol_Link=  polarization.

4. Wait for BEAM_SELECT_WAIT_TIME before recording the RSRPB reports.

5. Once the grid points scan is completed, sort the grid points based on the highest ISO_,B1 and ISO_,B2 or ISO_,B2 and ISO_,B1 (ISO_,B1, ISO_,B2, ISO_,B2 and ISO_,B1 are explained in H.2).

6. For the top [10] grid points, run the REFSENS throughput test as per the test condition defined in 38.521-2 clause 7.3.2

7. Grid points that pass the REFSENS throughput test are the potential UE direction to be used for running the tests.

8. If no grid points found in step 7, fall back to using H.1.1.

9. For running rank1 tests,

a. Pick any of the grid points obtained in step 7.

b. If the grid point satisfies the minimum isolation, exit the procedure.

10. For running rank2 tests,

a. Pick a grid point obtained in step 7.

b. If the grid point satisfies the minimum isolation, proceed to RI check.

Enable RI reporting from UE. If the UE reported rank = 2, exit the procedure.

If UE reported rank is not equal to 2, move to the next grid from step 7 and run step 10.

d. If no grid point meets the criteria in step 7 and step 10b, fallback to using H.1.1.