The correct answers are

A. DMRS of the uplink PUSCH of the UE and

B. Downlink DMRS signal.

According to the official Huawei documentation, gNodeBs can use downlink DMRS signals or the

DMRS of the uplink PUSCH of the UE to obtain downlink channel characteristics. The downlink DMRS

signals contain information about the downlink channel characteristics, and the DMRS of the uplink

PUSCH of the UE can be used to measure the uplink channel characteristics. The uplink SRS and PMI

signals reported by the UE are used to determine the uplink channel characteristics. For more

information,

please

see

this

link:

https://www.huawei.com/en/doc/NR-BBU-DesignV1.1/18104301/bbuf-cqi-report.html

:

H110V6 refers to a scenario where there are 110 horizontal and 6 vertical antenna elements installed

on the gNodeB, which is ideal for providing coverage in high-rise office buildings. The high number of

horizontal antenna elements allows for high-density deployment, which can improve the coverage

and capacity of the network in these types of environments.

Reference:

"H110V6 can be used to cover high-rise buildings, such as office buildings and hotels, which have

complex indoor environments. The high number of horizontal antenna elements can provide strong

coverage and capacity." in Huawei official website.

PCI (Physical Cell Identity) is related to the frequency-domain position of PBCH DMRSs (Physical

Broadcast Channel Demodulation Reference Signals)

The PBCH DMRSs are used to demodulate the Physical Broadcast Channel (PBCH) which contains

system information such as the cell identity, system bandwidth, and the downlink carrier frequency.

The PBCH DMRSs are transmitted in the frequency domain, and their position is determined by the

Physical Cell Identity (PCI). The PCI is a unique identifier assigned to each cell in the network, and it's

used to identify the cell and its system information.

So, the correct answer is

B. PCI. It's worth noting that the other parameters you mentioned are also

related to the 5G system information and the cell configuration. Cell ID is a unique identifier assigned

to each cell, SI-RNTI (System Information RNTI) is a unique identifier assigned to the system

information, and Bandwidth is the amount of frequency resources allocated to the cell.

On an NSA network, the eNodeB immediately triggers the SgNB addition procedure after a UE

attaches to the LTE network. If the SgNB addition fails, the eNodeB attempts to add the SgNB again

until it is successful. The eNodeB may also trigger an SgNB addition procedure if it detects a change

in its coverage area or if it detects a new SgNB or an SgNB that has been moved.