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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: 5G Network Planning and Design | 30% | - Capacity Planning
|
| Topic 2: 5G Radio Network Planning Fundamentals | 20% | - Radio Propagation and Coverage Principles
|
| Topic 3: 5G Network Optimization | 35% | - Coverage Optimization
|
| Topic 4: 5G Network Testing and Troubleshooting | 15% | - Testing Methods
|
>> H35-581_V2.0 Valid Exam Papers <<
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NEW QUESTION # 18
Which of the following MCS indices is required for 256QAM scheduling in downlink peak-rate testing?
Answer: A
Explanation:
MCS index 27 is the expected answer because it represents the highest non-reserved spectral-efficiency entry in the conventional NR PDSCH MCS table supporting 256QAM.
The Modulation and Coding Scheme (MCS) determines the modulation order and target coding rate used for scheduled data transmission.
For 256QAM, the modulation order is Q_m=8, meaning eight coded bits are mapped to each modulation symbol.
According to 3GPP TS 38.214, Table 5.1.3.1-2, MCS index 27 uses modulation order 8 and a target coding- rate parameter of 948/1024.
Its spectral efficiency is approximately 7.4063 bits per resource element before applicable resource overheads.
This makes index 27 particularly relevant when evaluating maximum downlink throughput under favorable radio conditions.
However, an important distinction exists between enabling 256QAM and achieving maximum spectral efficiency.
MCS index 23 also uses 256QAM, with a target coding-rate parameter of 797/1024 and a lower spectral efficiency of approximately 6.2266.
Therefore, both indices 23 and 27 can represent 256QAM modulation, but index 27 provides the higher nominal spectral efficiency.
MCS index 28 is reserved in the referenced table, while index 32 is outside the five-bit MCS index range.
Consequently, B is correct for maximum peak-rate testing.
Official Reference: 3GPP TS 38.214, Section 5.1.3.1, Table 5.1.3.1-2, MCS Index Table 2 for PDSCH .
Technical warning / qualification: Option D also represents 256QAM. The question is unambiguous only if peak-rate testing means selecting the highest non-reserved spectral-efficiency entry. The wording should explicitly state this condition.
NEW QUESTION # 19
Which of these statements about the downlink scheduling process are correct?
Select All that Apply
Answer: B,C,D
Explanation:
Options A, B, and D represent the intended downlink scheduling principles described in the updated question bank.
Downlink scheduling is controlled by the gNodeB, which assigns radio resources and selects transmission parameters according to channel conditions, traffic demand, interference, and retransmission requirements.
Option A: Interference randomization can be used as an interference-management technique in heavily loaded radio networks. Its purpose is to reduce persistent interference effects by varying the relevant transmission or resource-allocation characteristics. However, enabling a particular Huawei interference- randomization feature at high PRB utilization is an implementation-specific recommendation.
Option B: The gNodeB uses HARQ acknowledgment information reported by the UE to determine whether transmitted downlink data has been successfully decoded or whether retransmission may be required.
Option D: Channel Quality Indicator (CQI) feedback provides information about the radio channel and supports Modulation and Coding Scheme (MCS) selection. Higher-quality conditions generally permit higher- order modulation and more efficient coding.
Option C is incorrect because downlink scheduling does not universally require an explicit scheduling request initiated by the UE.
The gNodeB already manages downlink data queues and can schedule available downlink traffic according to the configured scheduling mechanism.
Therefore, A, B, and D are the intended selections.
Official Reference: 3GPP TS 38.214, Sections 5.1 and 5.2, PDSCH Procedures and CSI Reporting ; TS
38.321, Section 5.3.2, Downlink HARQ Operation .
Technical warning / qualification: Options B and D are supported by standardized mechanisms. Option A is a vendor-specific optimization recommendation and requires confirmation against the Huawei scheduling feature documentation for the relevant release.
NEW QUESTION # 20
Which of the following options cannot be used to address weak coverage issues?
Answer: A
Explanation:
Adjusting neighbor relationships is the intended incorrect coverage-optimization method because neighbor configuration primarily controls mobility procedures rather than the physical radio-signal conditions that determine coverage.
Weak coverage occurs when the received signal level or effective link budget is insufficient to maintain the required radio connection and service quality.
Coverage optimization generally focuses on antenna configuration, transmit power, receiver sensitivity, propagation conditions, and interference management.
A Tower Mounted Amplifier (TMA), where supported by the equipment architecture, can improve uplink receiver performance by reducing the effective receive-system noise figure and compensating for feeder- related losses.
Antenna optimization can improve the geographical distribution of radio energy by adjusting azimuth, electrical or mechanical downtilt, antenna height, and antenna gain.
Increasing gNodeB downlink transmit power may improve received reference-signal strength, provided regulatory limits, interference considerations, and equipment constraints are respected.
Neighbor relationships serve a different function.
They identify neighboring cells that may participate in measurements, handovers, and other mobility procedures.
Changing a neighbor relationship does not directly improve propagation loss, received signal strength, or the physical coverage footprint.
Although neighbor optimization can resolve mobility failures that appear to users as coverage problems, it cannot independently correct an RF link-budget deficiency.
Therefore, option A is correct.
Official Reference: 3GPP TS 38.300, Overall Description of NR and NG-RAN , mobility-management principles; TS 38.133, Requirements for Support of Radio Resource Management . The specific RF- optimization distinction follows radio-planning principles rather than a vendor-mandated procedure.
NEW QUESTION # 21
To achieve the 5G downlink single-user peak rate, what must the number of downlink grants be? (The slot configuration is 4:1 and the subcarrier spacing is 30 kHz.)
Answer: A
Explanation:
The expected answer is 1,600 downlink grants per second, based on the numerical assumptions used in the supplied 5G peak-rate calculation.
In 5G NR, subcarrier spacing determines the slot duration. For a normal cyclic prefix, the number of slots per millisecond is:
N_slots/ms = 2