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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: 5G RAN Feature Application | 35% | - Mobility management and handover optimization - Energy saving and coverage enhancement features - Power control and load balancing - Carrier aggregation and dual connectivity |
| Topic 2: 5G Radio Network In-depth Principles | 30% | - 5G spectrum and frame structure - 5G NR protocol stack and signaling procedures - 5G NR air interface fundamentals - Massive MIMO and beamforming principles |
| Topic 3: 5G Radio Network Planning | 10% | - Link budget calculation - Parameter planning and configuration - Interference analysis and mitigation - Coverage and capacity planning |
| Topic 4: 5G Radio Network Optimization | 20% | - Drive test and signaling tracing - Performance indicator analysis - Coverage, capacity, and quality optimization - Fault diagnosis and troubleshooting |
| Topic 5: 5G Industry Applications & Private Network Solutions | 5% | - Vertical industry scenarios and KPI requirements - Private 5G network requirements and design |
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質問 # 56
Which of the following parameters determines the PRACH time-domain position?
正解:D
質問 # 57
A single measurement counter of the gNodeB can be part of multiple measurement subsets.
正解:A
解説:
The intended answer is True because a gNodeB measurement counter may be associated with multiple measurement subsets or groupings within a performance-management implementation.
Performance measurement is essential for evaluating NR radio-network quality, identifying faults, monitoring resource utilization, and supporting optimization decisions.
A measurement counter represents an individual statistical quantity, such as the number of connection attempts, handover failures, successfully transferred data units, or occupied radio resources.
Measurement subsets provide logical groupings through which selected counters are organized and collected for particular operational purposes.
For example, a counter recording handover failures may contribute to a mobility-performance measurement subset and also be included in a broader service-quality measurement grouping.
This arrangement allows the same underlying statistical quantity to support different performance-analysis activities without requiring the network element to maintain entirely unrelated measurements for each report.
The counter's identity and measurement definition remain unchanged, even when it is referenced through several logical groupings.
However, the concepts of measurement counter, measurement subset, measurement job, and performance report must be distinguished. Their exact relationships depend on the performance-management data model and vendor implementation.
The updated question bank explicitly identifies this statement as true.
Official Reference: 3GPP TS 28.552, 5G Performance Measurements ; TS 28.550, Performance Management - Concepts and Requirements .
Technical warning / qualification: These standards establish 5G performance-measurement concepts, but the precise Huawei rule allowing one counter to belong to multiple measurement subsets has not been independently verified against the Huawei counter-configuration documentation.
質問 # 58
Which of the following messages can carry NSSAI information?
Select All that Apply
正解:C、D
解説:
Options C and D are correct because Network Slice Selection Assistance Information (NSSAI) can be conveyed through both the NAS Registration Request and the NR RRCSetupComplete message.
In 5G, NSSAI enables the network to identify the network slices requested or supported for a particular UE.
Individual slices are represented by Single Network Slice Selection Assistance Information (S-NSSAI), comprising a Slice/Service Type (SST) and an optional Slice Differentiator (SD).
Option C - Registration Request: During 5G registration, the UE may include Requested NSSAI in its NAS Registration Request. This enables the Access and Mobility Management Function (AMF) to evaluate the requested slices against subscription information and network availability.
Option D - RRC Setup Complete: The NR RRCSetupComplete message includes an optional s-NSSAI- List information element. When supplied by the upper layers, this element can communicate S-NSSAI information during RRC connection establishment.
Options A and B are incorrect because RRCSetup and RRCSetupRequest do not contain the corresponding NSSAI information element.
The distinction is that the NAS Registration Request communicates slice information for core-network registration, whereas RRCSetupComplete can provide relevant slice assistance information through access- stratum signaling.
Therefore, C and D are the correct selections.
Official Reference: 3GPP TS 38.331, Section 6.2.2, RRCSetupComplete Message ; TS 24.501, Sections
4.6.2.3 and 8.2.6, Registration Request and Requested NSSAI .
質問 # 59
Which NAS security encryption algorithms are supported by an RG?
Select All that Apply
正解:B、C、D
解説:
SNOW 3G, ZUC, and AES are standardized ciphering algorithms supported within the 5G security architecture for Non-Access Stratum (NAS) protection.
NAS security protects signaling exchanged between the UE and the Access and Mobility Management Function (AMF), including registration, authentication-related procedures, mobility management, and applicable NAS transport messages.
3GPP TS 33.501 identifies three principal 128-bit non-null ciphering algorithm families.
128-NEA1 is based on SNOW 3G, a stream-cipher algorithm originally developed for mobile-network security applications.
128-NEA2 uses the Advanced Encryption Standard (AES) in Counter (CTR) mode.
128-NEA3 is based on ZUC, a stream cipher standardized for mobile telecommunications security.
The serving network selects a ciphering algorithm according to the UE security capabilities and the algorithms permitted by the network configuration.
Option A is incorrect because quantum encryption is not one of the standardized NAS ciphering algorithms defined in the referenced 3GPP specification.
An additional standardized option, NEA0, represents null ciphering, but it is not listed among the available answers.
Therefore, B, C, and D identify the applicable standardized non-null algorithm families.
Official Reference: 3GPP TS 33.501, Sections 5.11.1.1 and 5.11.2, Ciphering Algorithm Identifier Values and Requirements for Algorithm Selection .
Technical warning / qualification: The question uses RG without defining the abbreviation. The explanation verifies standardized 5G NAS ciphering algorithms, but whether a particular residential gateway supports all three depends on its implementation and advertised security capabilities. The wording should specify the intended gateway type.
質問 # 60
Which of the following PUCCH measurement counters is used for outer-loop power control on PUCCH?
正解:A
解説:
Block Error Rate (BLER) is the intended answer because outer-loop power-control algorithms use error- performance feedback to adjust the target received signal quality required for reliable control-channel reception.
PUCCH carries essential Uplink Control Information (UCI), including HARQ acknowledgments, scheduling requests, and configured channel-state reports.
Errors in these transmissions can produce unnecessary retransmissions, incorrect scheduling decisions, and reduced radio-network efficiency.
The distinction between inner-loop and outer-loop power control is important.
Inner-loop power control adjusts transmission power according to the difference between measured signal quality, commonly expressed through SINR, and a configured target.
The gNodeB can issue Transmit Power Control (TPC) commands to modify the UE's PUCCH transmit power.
Outer-loop power control adjusts the target signal-quality requirement according to observed error performance. When reception reliability deteriorates, the target SINR can be increased to improve decoding probability. Conversely, consistently satisfactory error performance can permit a reduction in the target.
RSRP measures received reference-signal power, while power spectral density expresses signal or noise power per unit bandwidth. Neither directly represents the error-performance feedback used in the intended outer-loop mechanism.
Therefore, BLER is the expected examination answer, with implementation-specific qualifications.
Official Reference: 3GPP TS 38.213, Section 7.2.1, PUCCH Transmit Power Control .
Technical warning / qualification: 3GPP specifies the PUCCH power-control signaling and calculations but does not mandate one universal BLER-based outer-loop algorithm. Huawei implementations may use BER or another error-performance measure depending on the radio technology and PUCCH configuration.
質問 # 61
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