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.

• A.True
• B.False

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If the NRDUCELL corresponding to NRCELL Is not set up, the NRCELL must be unavailable.

• A.False
• B.True

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The ESN of a gNodeB changes after the main control board Is replaced.

• A.True
• B.False

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