Which of the following statements about PDSCH DMR5 is incorrect?
Answer(s): A
The statement "The start symbol of a front-loaded DMRS of a type B PDSCH is always the first symbol of PDSCH" is incorrect. In 5G NR, the start symbol of a front-loaded DMRS of a type B PDSCH can be configured as the first symbol of PDSCH or as the second symbol of PDSCH. You can refer to the Huawei official documentation for HCIP-5G-RAN V2.0 certification and the 3GPP 5G NR standard (38.211, 38.212, 38.213) for more information on PDSCH DMRS, including the configurations of the front-loaded DMRS, the DMRS symbols and the optional and mandatory nature of it.Here are some official references:Huawei HCIP-5G-RAN V2.0 certification page: https://e.huawei.com/en/certifications/hcip-5g-ran- v2-03GPP 5G NR standard: https://www.3gpp.org/specifications/5g-nr-specifications
Which of the following statements about NR subcarriers are incorrect?
Answer(s): A,B,D
The statement A is incorrect. The larger the subcarrier spacing [1], the shorter the symbol duration on each subcarrier, not the larger number of symbols. Statement B is also incorrect. The larger the subcarrier spacing [1], the larger the CP length and the more suitable it becomes for wide coverage. Statement C is correct. The smaller the subcarrier spacing, the lower the power spectral density. Statement D is incorrect. The larger the subcarrier spacing [1], the shorter the slot length. https://asp-eurasipjournals.springeropen.com/articles/10.1186/s13634-020-00696-11. A novel timing and frequency offset estimation algorithm for filtered ... https://asp-eurasipjournals.springeropen.com/articles/10.1186/s13634-020-00696-1 https://www.sciencedirect.com/topics/engineering/extended-cyclic-prefix Extended Cyclic Prefix - an overview | ScienceDirect Topics https://www.sciencedirect.com/topics/engineering/extended-cyclic-prefix http://www.techplayon.com/5g-nr-numerology-subcarrier-spcaing-scs/ 5G NR Numerology - Subcarrier Spcaing (SCS) - Techplayon http://www.techplayon.com/5g-nr-numerology-subcarrier-spcaing-scs/
Which of the following actions will trigger SgNB release by the MeNB?
Answer(s): A,D
The UE inactivity timer on the NR side expiring and the air interface link on the NR side being abnormal, and a UE reporting SCG Failure Info to the eNodeB, can both trigger the MeNB to release the SgNB. Other actions, such as an inter-SgNB cell change or the MeNB detecting an abnormal X2 link, may also lead to SgNB release, but are not the trigger for it. https://www.sciencedirect.com/topics/engineering/extended-cyclic-prefix Extended Cyclic Prefix - an overview | ScienceDirect Topics https://www.sciencedirect.com/topics/engineering/extended-cyclic-prefix http://www.techplayon.com/5g-nr-numerology-subcarrier-spcaing-scs/ 5G NR Numerology - Subcarrier Spcaing (SCS) - Techplayon http://www.techplayon.com/5g-nr-numerology-subcarrier-spcaing-scs/
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?
Answer(s): B
BWP (Bandwidth Part) is related to the time-frequency position of the PRACH used by the UE in the contention-based random access procedure. According to the official Huawei documentation, the BWP consists of one or more contiguous frequency sub-bands of the PRACH and defines the time- frequency position of the PRACH used by the UE.
https://support.huawei.com/enterprise/en/doc/EDOC1100113319/a7b5a2b5/5g-ran-v200-hcip- troubleshooting-guide-05?sectionFlag=true
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