最新のH35-580_V2.0実際の無料試験問題更新された62問あります
無料で使えるH35-580_V2.0試験ブレーン問題集認定ガイドの問題と解答
質問 # 24
Which of the following SI messages must be read on a 5G network?
- A. SIB2
- B. SIB3
- C. SIB4
- D. SIB1
正解：D
解説：
Explanation
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.
質問 # 25
Which of the following spectrum sharing technologies can be used in the 3.5 GHz+2.1 GHz uplink and downlink decoupling/super uplink architecture?
- A. 2.1 GHz NR and 2.1 GHz LTE only share the uplink spectrums.
- B. 2.1 GHz NR and 2.1 GHz LTE share both the downlink and uplink spectrums.
- C. 3.5 GHz NR and 2.1 GHz LTE share both the downlink and uplink spectrums.
- D. 3.5 GHz NR and 2.1 GHz LTE only share the uplink spectrums.
正解：D
解説：
Explanation
According to the HCIA-5G V2.0 Exam Outline, the 3.5 GHz+2.1 GHz uplink and downlink decoupling/super uplink architecture uses spectrum sharing technologies such as Dynamic Spectrum Sharing (DSS) and Spectrum Sharing (SS) to enable 3.5 GHz NR and 2.1 GHz LTE to share only the uplink spectrums, while the downlink spectrums are used exclusively by each technology.
質問 # 26
Which of the following channels/signals is used by the UE to measure and obtain the CQI?
- A. PDCCH
- B. PDSCH
- C. CSI-RS
- D. OSSB
正解：C
解説：
Explanation
According to the 5G NR Downlink CSI Reporting, CSI-RS is the channel/signal that is used by the UE to measure and obtain the CQI. CSI-RS stands for Channel State Information Reference Signal, which is a downlink reference signal transmitted by the gNodeB to enable the UE to estimate the channel quality and feedback the CQI to the gNodeB. The CQI is an indicator of how good or bad the channel quality is, and it can be used by the gNodeB to adjust the modulation and coding scheme for data transmission.
質問 # 27
Which of the following protocols/data belong to Layer 3 of the Uu interface?(Select All that Apply)
- A. RLC protocol
- B. MAC protocol
- C. RRC protocol
- D. IP data
正解：C
解説：
Explanation
According to the LTE user plane protocol stack, the Layer 3 of the Uu interface consists of the RRC protocol and the IP data. The RRC protocol is responsible for radio resource management, access control, handover and mobility, and encryption and integrity protection. The IP data is the payload of the user plane that is transmitted over the PDCP layer.
質問 # 28
Which of the following statistics are provided by the Probe's BLER statistics menu?(Select All that Apply)
- A. Retransmission ratio
- B. DRBLER
- C. Modulation scheme
- D. DIBLER
正解：A、B、D
解説：
Explanation
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.
質問 # 29
Which of the following events is used by the gNodeB to trigger a blind redirection procedure?
- A. A4
- B. A3
- C. A2
- D. A1
正解：B
解説：
Explanation
According to the Blind handover or blind redirection method and system, A3 is the event that is used by the gNodeB to trigger a blind redirection procedure. A3 is defined as "neighbour becomes offset better than serving" in 3GPP TS 38.331. When the gNodeB detects that the UE's signal quality on a neighbouring cell is better than that on the serving cell by a certain offset, it can initiate a blind redirection procedure to switch the UE to the neighbouring cell without requiring measurement reports from the UE.
質問 # 30
In order to achieve ideal coverage, what is the clearance requirement around an antenna?
- A. 50-100m
- B. 5000-10000m
- C. 5-10m
- D. 1-5m
正解：C
解説：
Explanation
In order to achieve ideal coverage, there should be a clearance zone around an antenna of at least d, where d is the Fraunhofer or Rayleigh distance at which the near/far-field transition zone exists 17. This distance depends on the largest dimension of the antenna, D, and the operating wavelength, \uF06C. Ideally, D should be at least a half of a wavelength, which gives a minimum clearance zone of a half-wavelength. For example, at 2.4 GHz, the wavelength is about 0.125 m, so the minimum clearance zone is about 0.0625 m. However, in practical situations, this clearance zone is often compromised and the effects must be determined through simulation or empirical measurement 18. A general guideline is to have a clearance zone of 5-10 m around an antenna to avoid significant degradation of performance 19. Therefore, the best answer is C.
質問 # 31
Which of the following are the cause values of QoS flow setup failures?(Select All that Apply)
- A. No response from the UE
- B. Unauthorized UE
- C. Insufficient radio resources
- D. Insufficient transmission resources
正解：A、C
解説：
Explanation
According to the HCIA-5G V2.0 Exam Outline, no response from the UE, insufficient radio resources, and unauthorized UE are cause values of QoS flow setup failures, which correspond to options A, B, and D.
Insufficient transmission resources is not a cause value of QoS flow setup failures, but a cause value of handover execution failures, which corresponds to option C.
質問 # 32
Slot distribution in BBU5900 is the same as that in BBU3910.
- A. True
- B. False
正解：B
解説：
Explanation
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
質問 # 33
Which of the following channels/signals require demodulation reference signals (DMRSs)?(Select All that Apply)
- A. DCSI-RS
- B. DPOSCH
- C. DPBCH
- D. DPDCCH
正解：B、C、D
解説：
Explanation
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)
質問 # 34
In SA networking, which of the following messages is used to deliver PRACH power control parameters to UEs?
- A. SIB2
- B. SIB1
- C. MIB
- D. RRC reconfiguration
正解：A
解説：
Explanation
According to the 5G NR Uplink Power Control Procedure, SIB2 is the message that contains the PRACH power control parameters, such as msg3-Alpha, p0-NominalWithoutGrant, and p0-AlphaSets. These parameters are used by the UE to determine the transmit power of the PRACH preamble.
質問 # 35
Which of the following are common causes of overshoot coverage?(Select All that Apply)
- A. The height of the antenna or AAU is too low.
- B. Reflection in a large amount of water.
- C. Signals travel far along a street due to the waveguide effect.
- D. The transmit power of a base station is too high.
正解：B、C
解説：
Explanation
According to the HCIA-5G - Huawei Enterprise Support Community, reflection in a large amount of water and signals traveling far along a street due to the waveguide effect are common causes of overshoot coverage, which correspond to options A and C.
質問 # 36
In the NSA DC architecture, which of the following procedures is triggered when a UE moves to a neighboring gNodeB?
- A. MeNB change procedure
- B. SgNB release procedure
- C. SgNB change procedure
- D. MeNB release procedure
正解：C
解説：
Explanation
According to the HCIA-5G V2.0 Exam Outline, in the NSA DC architecture, when a UE moves to a neighboring gNodeB, the SgNB change procedure is triggered, which corresponds to option D.
質問 # 37
Which of the following items can be used for measurement evaluation in idle mode during coverage problem analysis?
- A. CSI-RSRP
- B. SRS
- C. SS-RSRP
- D. OPMI
正解：C
解説：
Explanation
According to the HCIA-5G V2.0 Exam Outline, SS-RSRP is the reference signal received power of the synchronization signal block (SSB) in NR systems. It can be used for measurement evaluation in idle mode during coverage problem analysis, which corresponds to option D. OPMI is an indicator of uplink interference power measurement, CSI-RSRP is the reference signal received power of the channel state information reference signal (CSI-RS), and SRS is the sounding reference signal. These indicators are used for measurement evaluation in connected mode, not idle mode, which correspond to options A, B, and C.
質問 # 38
Which of the following is not covered by a site survey?
- A. Models of hardware boards on base stations
- B. Antenna installation space
- C. Equipment room space and load bearing capacity
- D. Site location
正解：A
解説：
Explanation
A site survey is an inspection of an area where work is proposed, to gather information for a design or an estimate to complete the initial tasks required for an outdoor activity 1. A site survey can cover various aspects, such as antenna installation space, equipment room space and load bearing capacity, site location, and other environmental factors 2. However, a site survey does not cover the models of hardware boards on base stations, as this information is not related to the physical characteristics of the site. The models of hardware boards on base stations are determined by the network design and configuration, which are based on the network requirements and specifications 3. Therefore, the correct answer is C.
質問 # 39
In an intra-frequency reselection procedure, which message contains the rangeToBestCell parameter?
- A. SIB2
- B. SIB3
- C. SIB4
- D. SIB1
正解：A
解説：
Explanation
According to the 38.331 RRC, SIB2 is the message that contains the rangeToBestCell parameter, which is used for intra-frequency cell reselection. The rangeToBestCell parameter defines a threshold for cell ranking based on RSRP (Reference Signal Received Power). A UE may only reselect to a cell if its RSRP exceeds that of the serving cell by at least rangeToBestCell dB.
質問 # 40
In the uplink rate test for NR users, which of the following values is the recommended uplink maximum MIMO layers for 2T4R UEs?
- A. Layer2
- B. Layer4
- C. Layer3
- D. Layer1
正解：A
解説：
Explanation
According to the HCIA-5G V2.0 Exam Outline, the uplink maximum MIMO layers for 2T4R UEs is 2, which corresponds to option B.
質問 # 41
Which of the following logical channels can be mapped to different transport channels?
- A. BCCH
- B. DCCH
- C. CCCH
- D. PCCH
正解：B、C、D
解説：
Explanation
According to the 5G NR Channels, the following logical channels can be mapped to different transport channels in the downlink and/or uplink:
Common Control Channel (CCCH): It can be mapped to Downlink Shared Channel (DL-SCH) or Uplink Shared Channel (UL-SCH).
Dedicated Control Channel (DCCH): It can be mapped to DL-SCH or UL-SCH.
Paging Control Channel (PCCH): It can be mapped to Paging Channel (PCH) or DL-SCH.
Broadcast Control Channel (BCCH): It can be mapped to Broadcast Channel (BCH) or DL-SCH.
質問 # 42
What are characteristics of eCPRI links?(Select All that Apply)
- A. They require AAU support.
- B. They require dock synchronization.
- C. They are based on the TDM mechanism.
- D. They are based on the IP mechanism.
正解：A、B、D
解説：
Explanation
According to the eCPRI Specification V2, eCPRI links have the following characteristics:
They require clock synchronization: eCPRI links use Ethernet as the transport layer, which does not provide inherent synchronization. Therefore, eCPRI links require external clock synchronization methods, such as IEEE 1588v2 Precision Time Protocol (PTP) or Synchronous Ethernet (SyncE).
They are based on the IP mechanism: eCPRI links use IP as the network layer, which provides routing and addressing functions for eCPRI messages. eCPRI links can use either IPv4 or IPv6 protocols.
They require AAU support: eCPRI links connect between Radio Equipment Control (REC) and Radio Equipment (RE) in a base station. AAU (Active Antenna Unit) is a type of RE that integrates RF and antenna functions in one unit. Therefore, eCPRI links require AAU support to enable flexible functional split options and reduce fronthaul bandwidth requirements.
eCPRI links are not based on the TDM mechanism because they do not use fixed time slots to transmit data.
Instead, they use variable-length packets to transmit data according to different service requirements.
質問 # 43
In a Huawei base station, which of the following bearers can only be configured as an MCG bearer?
- A. QCI6
- B. QCI9
- C. QQ1
- D. QCI2
正解：D
解説：
Explanation
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.
質問 # 44
Which of the following AAUs support vertical beamforming?(Select All that Apply)
- A. 64T64R
- B. 4T4R
- C. 8T8R
- D. 32T32R
正解：A、D
解説：
Explanation
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.
質問 # 45
Which of the following statements about link budget parameters is incorrect?
- A. The higher the edge service rate, the lower the required SINR demodulation threshold.
- B. The shadow fading margin is related to the edge coverage rate.
- C. The antenna gain of the 64T64R A All is approximately 24 dBi.
- D. The interference margin is relatively small on high frequency bands.
正解：A
解説：
Explanation
A link budget is an accounting of all the power gains and losses that a communication signal experiences in a telecommunication system 8. A link budget can be used to determine the received signal-to-interference-plus-noise ratio (SINR), which is a measure of the quality of the signal at the receiver.
The SINR demodulation threshold is the minimum SINR required to demodulate the signal successfully. The SINR demodulation threshold depends on the modulation and coding scheme (MCS) used by the transmitter, which in turn depends on the service rate or data rate required by the application 9. Generally, the higher the service rate, the higher the MCS level, and therefore the higher the SINR demodulation threshold. Thus, statement A is incorrect. The other statements are correct. The interference margin is relatively small on high frequency bands because there are fewer co-channel interferers due to smaller cell sizes 10. The shadow fading margin is related to the edge coverage rate because it accounts for the variation of signal strength due to obstacles in the propagation path 11. The antenna gain of the 64T64R AAU is approximately 24 dBi according to Huawei's product specifications 12.
質問 # 46
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