Question No 1

Which of the following statements about PDSCH DMR5 is incorrect?

Choose the Choices:

The start symbol of a front - loaded DMRS of a type B PDSCH is always the first symbol of PDSCH.

The front - loaded DMRS is mandatory, and the additional DMRS is optional.

The overhead of type 1 DMRS is less than that of type 2 DMRS.

The start symbol of a front - loaded DMRS of a type A PDSCH can be symbol 2.

Question No 2

Which of the following statements about NR subcarriers are incorrect?

Choose the Choices:

The larger the subcarrier spacing, the larger the number of symbols.

The smaller the subcarrier spacing, the larger the CP length and the more suitable it becomes for wide coverage.

The smaller the subcarrier spacing, the lower the power spectral density.

The larger the subcarrier spacing, the larger the slot length.

Question No 3

Which of the following actions will trigger SgNB release by the MeNB?

Choose the Choices:

The UE inactivity timer on the NR side expires.

An inter - SgNB cell change occurs.

The MeNB detects that the X2 link is abnormal.

The air interface link on the NR side is abnormal, and a UE reports SCG Failure Info to the eNodeB.

Question No 4

In the contention - based random access procedure, which of the following is related to the time - frequency position of the PRACH used by the UE?

Choose the Choices:

Question No 5

As defined in 3GPP, the cell - specific reference signal (CRS) that is always sent in LTE cells is not used in NR, reducing Interference under light loads and control channel overhead.

Choose the Choices:

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