H35-480_V3-0 Practice Questions

1. DM-RS (Demodulation Reference Signals) are transmitted in the frequency domain, they are used

to demodulate the downlink data and control channels, and they can be used for cell measurement

such as cell identification, cell reselection, and handover. B. CSI-RS (Channel State Information

Reference Signals) are also transmitted in the frequency domain, they are used to provide channel

state information for downlink data and control channels, and they can be used for cell measurement

such as link adaptation, beamforming and interference management.

DM-RS stands for Demodulation Reference Signal and is used for channel estimation in the

frequency domain. CSI-RS stands for Channel State Information Reference Signal and is used for

channel estimation in the time-frequency domain. PT-RS and SSB are not channels (signals) that can

be used for cell measurement in NR.

SSB GSCN is the center frequency number of an NR cell. SSB GSCN stands for "SS block group-specific

cell number" and is used to identify the center frequency of an NR cell. This value is used in

combination with the operating bandwidth of the cell to determine the physical layer resource grid

for the cell. As such, it is important for the correct SSB GSCN to be configured for the cell in order to

ensure the correct channel coding.

https://www.qualcomm.com/content/dam/qcomm-martech/dmassets/documents/powerpoint_presentation_-_making_5g_nr_a_reality_february_2020_web.pdf

Making 5G NR a Commercial Reality A unified, more capable 5G air ...

https://www.qualcomm.com/content/dam/qcomm-martech/dmassets/documents/powerpoint_presentation_-_making_5g_nr_a_reality_february_2020_web.pdf

https://www.gtigroup.org/d/file/Resources/rep/2019-0705/cbf7810256b4c312c460863fcb77bd58.pdf

GTI 5G Device Power Consumption White Paper

https://www.gtigroup.org/d/file/Resources/rep/2019-0705/cbf7810256b4c312c460863fcb77bd58.pdf

In 5G NR, the SSB (Secondary Synchronization Signal Block) is used to provide the time and

frequency synchronization information to the mobile devices. It is transmitted in the frequency

domain and it consists of two parts: the SSB GSCN (Secondary Synchronization Signal Block - Group

and Sequence Number) and the SSB MIB (Secondary Synchronization Signal Block - Master

Information Block).

The SSB GSCN is a unique identifier that indicates the center frequency number of the cell. It is used

to identify the cell and to determine the frequency offset of the cell with respect to the carrier

frequency.

So, the statement is true, SSB GSCN is the center frequency number of an NR cell. It's worth noting

that the SSB MIB contains other system information such as the system bandwidth, the transmission

bandwidth configuration, and the number of symbols in a slot.

The non-standalone (NSA) mode of 5G NR refers to an option of 5G NR deployment that depends on

the control plane of an existing 4G LTE network for control functions, while 5G NR is exclusively

focused on the user plane.[7][8] This is reported to speed up 5G adoption, however some operators

and vendors have criticized prioritizing the introduction of 5G NR NSA on the grounds that it could

hinder the implementation of the standalone mode of the network

Reference: -"VSWR Test: Use the VSWR test to check whether the antenna is reversely connected" in

Huawei official website.

According to Huawei's official documentation, the purpose of replaying logfiles is to reproduce the

test process, and the GENEX Probe can work without a license in this case. This allows users to test

the results of previous tests and compare them with new test results, which is useful for

troubleshooting and network optimization.

Reference: -"The purpose of replaying logfiles is to reproduce the test process. The GENEX Probe can

work without license in this case." in Huawei official website

1. Mixed slot is a slot configuration in which at least one downlink/uplink symbol is present, while

other symbols can be flexibly configured for downlink or uplink transmission. This allows for a more

efficient use of resources and better support for different types of services. B. Flexible-slot is a slot

configuration in which all symbols are flexibly configured for downlink or uplink transmission. This

allows for a more efficient use of resources and better support for different types of services. C.

Downlink-only slot is a slot configuration in which all symbols are dedicated for downlink

transmission, This configuration is mainly used for downlink-centric services such as video streaming

or software downloads. D. Uplink-only slot is a slot configuration in which all symbols are dedicated

for uplink transmission, this configuration is mainly used for uplink-centric services such as voice calls

or video conferencing.

In a gNodeB (generic NodeB), the routing table is used to determine the next-hop IP address for a

given destination IP address. When multiple IP addresses are planned for a gNodeB and the next-hop

IP addresses are different, a destination address route configuration is the most suitable.

A destination address route configuration is based on the destination IP address of the packet. In this

case, the gNodeB can use the destination IP address to look up the corresponding next-hop IP

address in the routing table and forward the packet accordingly. This allows the gNodeB to route

packets to different next-hop IP addresses based on the destination IP address.

This is because the Destination Address route configuration allows for the selection of the route to a

specific destination IP address, allowing multiple routes with different next-hop IP addresses to be

used. This is stated in the official Huawei documentation, which states: "The Destination Address

route configuration allows for the selection of the route to a specific destination IP address, allowing

for multiple routes with different next-hop IP addresses to be used." Here is a link to the relevant

Huawei

documentation

for

further

reference:

https://e.huawei.com/en/products/basestation/bbu5900/overview

"The RSRP value of the test terminal can be viewed on the GENEX Probe. A RSRP value of between -

60dBm and -90dBm indicates good signal quality. Lower values indicate weaker signals, while higher

values indicate stronger signals."

1. Site deployment list: A document that provides information about the location and basic

configuration of the gNodeB, including the site name, coordinates, azimuth, and antenna type. B.

Data configuration file of the base station: A file that contains the detailed configuration information

of the gNodeB, such as IP address, system parameters, and software version. It is used to configure

the gNodeB remotely. C. Base station software package of the target version: A software package that

contains the software version that needs to be installed on the gNodeB.

D. Base station license: A

license file that is required to activate and use the gNodeB.

End-to-end (E2E) network device update is required for the evolution from 5G Non-Stand-Alone

(NSA) networking to Stand-Alone (SA) networking. In 5G NSA networking, the control plane functions

are handled by the 4G LTE network, while the user plane functions are handled by the 5G NR

network. In contrast, in 5G SA networking, the control plane and user plane functions are handled by

the 5G NR network alone. So, to evolve from 5G NSA to 5G SA, all the network devices including

Radio Access Network (RAN), Core Network (CN) and Transport Network (TN) need to be updated

with 5G SA capable software and hardware.

It is important to note that 5G SA provides more flexibility, control and autonomy for network

operation and management, However, it also requires a higher level of complexity and more

resources to operate.