Pass the Huawei HCIA-5G H35-580_V2.0 Questions and answers with ExamsMirror

According to the 5G Site Survey Guide (V1.0) (PDF)-EN, the engineering file is not a material that needs to be prepared before site survey. The engineering file is a document that records the site survey results and the design plan for the site. The engineering file is generated after the site survey is completed and approved by the customer. The materials that need to be prepared before site survey are:

Local map: A map of the area where the site is located, showing the roads, buildings, landmarks, and other features. The local map helps the site survey team to plan the route, identify the site location, and evaluate the surrounding environment.

Site survey table: A table that lists the items and parameters that need to be checked and measured during the site survey, such as antenna installation space, equipment room space and load bearing capacity, power supply, grounding, lightning protection, cable routing, etc. The site survey table helps the site survey team to conduct a comprehensive and systematic inspection of the site conditions and record the data.

5G antenna height table: A table that shows the recommended antenna height for different scenarios and frequency bands based on empirical data and theoretical calculations. The 5G antenna height table helps the site survey team to determine the optimal antenna installation height for achieving the best coverage and performance.

Therefore, the correct answer is D.

According to the 5G NR Uplink Power Control Procedure, MCS index of the PUSCH is not a factor that needs to be considered during PUSCH power calculation. The MCS index determines the modulation and coding scheme of the PUSCH, but it does not affect the transmit power. The other factors, such as number of PUSCH RBs, SCS configuration for the PUSCH, and number of PUSCH symbols in the time domain, are all involved in the PUSCH power calculation formula.

According to the 5G NR Physical Layer Specifications, demodulation reference signals (DMRSs) are required for the following channels/signals in the downlink and uplink:

Downlink Physical Broadcast Channel (DPBCH)

Downlink Physical Downlink Control Channel (DPDCCH)

Downlink Physical Shared Channel (DPOSCH)

Uplink Physical Random Access Channel (PRACH)

Uplink Physical Uplink Control Channel (PUCCH)

Uplink Physical Uplink Shared Channel (PUSCH)

According to the 5G SIB Messages, SIB1 is the only mandatory SI message that must be read on a 5G network. SIB1 contains essential information for accessing the network, such as cell identity, cell barring, and scheduling information for other SI messages. SIB2, SIB3, and SIB4 are optional SI messages that provide additional information such as radio resource configuration, intra-frequency cell reselection, and neighboring cell information.

 According to the Hardware Description: Bbu5900 V100r013c10, the slot distribution in BBU5900 is not the same as that in BBU3910. The BBU5900 has 11 slots, while the BBU3910 has 12 slots. The slot distribution in BBU5900 is as follows:

A screenshot of a computer Description automatically generated

 According to the LTE-NR tight-interworking and the first steps to 5G, in a Huawei base station, QCI2 can only be configured as an MCG (Master Cell Group) bearer. QCI2 is a voice bearer that requires low latency and high reliability. Therefore, it cannot be configured as an SCG (Secondary Cell Group) bearer or a split bearer that may introduce additional delay or packet loss. QCI6, QCI9, and QQ1 can be configured as either MCG bearers, SCG bearers, or split bearers depending on the service requirements and network conditions.

According to the Probe User Guide (V100R019C10_01) (PDF)-EN, the Probe’s BLER statistics menu provides the following statistics:

DIBLER: Downlink Initial Block Error Rate, which is the ratio of the number of erroneous downlink transport blocks to the total number of downlink transport blocks received by the UE in the first transmission.

DRBLER: Downlink Residual Block Error Rate, which is the ratio of the number of erroneous downlink transport blocks to the total number of downlink transport blocks received by the UE after all retransmissions.

Retransmission ratio: The ratio of the number of retransmitted downlink transport blocks to the total number of downlink transport blocks received by the UE.

The Probe’s BLER statistics menu does not provide the modulation scheme as a statistic. The modulation scheme is a parameter that determines the modulation and coding scheme (MCS) used for data transmission on the physical downlink shared channel (PDSCH). The modulation scheme can be QPSK, 16QAM, 64QAM, or 256QAM. The modulation scheme can be displayed on the Probe’s PDSCH configuration menu or PDSCH demodulation menu.

Therefore, the correct answer is A, B, and D.

To find the number of RBs in a 5G cell, we need to know the bandwidth and the subcarrier spacing of the cell. The bandwidth is the total frequency range allocated for the cell, while the subcarrier spacing is the frequency separation between adjacent subcarriers in the cell. A RB is a group of 12 consecutive subcarriers in the frequency domain 12. Therefore, the number of RBs in a 5G cell can be calculated by dividing the bandwidth by the product of the subcarrier spacing and 12.

Given that the bandwidth is 100 MHz and the subcarrier spacing is 60 kHz, we can use the following formula to find the number of RBs:

Number of RBs = Bandwidth / (Subcarrier spacing * 12) Number of RBs = 100 MHz / (60 kHz * 12) Number of RBs = 100000 kHz / 720 kHz Number of RBs = 138.888…

However, since the number of RBs must be an integer, we need to round it down to the nearest multiple of 3 3. This is because the NR standard defines different frequency ranges for different subcarrier spacings, and each frequency range has a minimum and maximum number of RBs that are multiples of 3 4. For example, for subcarrier spacing of 60 kHz, the frequency range is from 24250.08 MHz to 52600.08 MHz, and the minimum and maximum number of RBs are 66 and 273, respectively.

Therefore, the closest multiple of 3 to 138.888… is 135. However, this number is not valid because it is lower than the minimum number of RBs for subcarrier spacing of 60 kHz. The next valid multiple of 3 is 273, which is also the maximum number of RBs for subcarrier spacing of 60 kHz. Therefore, the correct answer is C. 273.

According to the 5G Beamforming: An Engineer’s Overview, 32T32R and 64T64R AAUs support vertical beamforming. AAU stands for Active Antenna Unit, which is a type of antenna that integrates RF and antenna functions in one unit. Vertical beamforming is a technique that uses multiple antenna elements in a vertical array to form beams in different elevation angles. 32T32R and 64T64R AAUs have enough antenna elements to support vertical beamforming, while 8T8R and 4T4R AAUs do not have enough antenna elements to support vertical beamforming effectively.

According to the 5G-NR (EN-DC) Bearer Concept, in MR-DC (Multi-Radio Dual Connectivity) architecture, data split on a base station can be affected by the following factors:

PDCP layer buffer: The PDCP layer buffer stores user plane data before sending it to lower layers. The buffer size and occupancy can affect how data is split between LTE and NR bearers.

X2 latency: The X2 latency is the delay between LTE and NR base stations over the X2 interface. The X2 latency can affect how data is split between LTE and NR bearers by causing reordering or duplication of packets.

Air interface latency: The air interface latency is the delay between base stations and user equipment over the air interface. The air interface latency can affect how data is split between LTE and NR bearers by causing reordering or duplication of packets.

The RLC layer buffer does not affect data split on a base station because it is located below the PDCP layer where data split occurs.