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| Section | Objectives |
|---|---|
| Radio Network Optimization | - Interference analysis and mitigation - KPI analysis and optimization - Mobility optimization |
| Radio Network Planning | - Capacity planning - Site selection and dimensioning - Coverage planning |
| 5G Radio Network Fundamentals | - 5G NR system architecture and principles - Radio access network basics |
| Troubleshooting and Performance Enhancement | - Performance tuning methods - Fault diagnosis in 5G networks |
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18. Frage
Which of the following PUCCH measurement counters is used for outer-loop power control on PUCCH?
Antwort: D
Begründung:
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.
19. Frage
Which of the following modules assigns QFIs during PDU session establishment?
Antwort: C
Begründung:
The Session Management Function (SMF) is responsible for controlling QoS flows within a PDU session and allocating the associated QoS Flow Identifiers (QFIs).
In the 5G QoS architecture, a QoS flow is the smallest unit of QoS differentiation within a PDU session.
Each QoS flow is identified by a QFI, which is unique within the scope of that PDU session.
The SMF manages the establishment, modification, and release of QoS flows according to subscription information, policy decisions, and service requirements.
During PDU session establishment, the SMF determines the applicable QoS configuration and provides QoS- related information to the User Equipment (UE), access network, and User Plane Function (UPF).
The assigned QFI allows packets belonging to the same QoS flow to receive the appropriate forwarding treatment.
The UPF applies packet detection, forwarding, and QoS enforcement rules supplied through session management procedures, but it does not serve as the principal QFI allocation function.
The AMF manages access and mobility signaling and transports relevant session-management signaling between the UE and SMF.
The UDM supplies subscription and user-related data.
Although QFIs may be dynamically assigned or derived from standardized QoS identifiers in applicable configurations, QoS-flow control remains an SMF responsibility.
Therefore, option B is correct.
Official Reference: 3GPP TS 23.501, Sections 5.7.1.1 and 6.2.2, QoS Flow and Session Management Function .
20. Frage
A UE can report the following CSI types for CSI-RS measurement. Which of the statements below is incorrect?
Antwort: D
Begründung:
Option C is incorrect because the Rank Indicator (RI) identifies the preferred transmission rank, corresponding to the number of spatial layers suitable for MIMO transmission. It does not select an individual optimal layer based on CQI and PMI measurements.
In NR, CSI reporting allows the gNodeB to adapt beamforming, spatial multiplexing, modulation, and coding to the prevailing radio-channel conditions.
The Channel State Information Reference Signal (CSI-RS) provides measurement resources that support these procedures.
CRI (CSI-RS Resource Indicator) identifies the preferred CSI-RS resource. When CSI-RS resources correspond to distinct transmission beams, CRI can indicate the preferred beam.
PMI (Precoding Matrix Indicator) identifies a preferred precoding matrix selected from the configured codebook. This assists the gNodeB in determining suitable spatial transmission weights.
RI (Rank Indicator) specifies the preferred number of MIMO spatial layers, considering the channel's capacity to support simultaneous data streams.
CQI (Channel Quality Indicator) represents the estimated downlink channel quality under the configured reporting assumptions and supports link adaptation.
The distinction is that RI describes transmission rank, not layer identity. In configurations that support a Layer Indicator (LI), LI provides information concerning the strongest layer associated with the reported precoder.
Consequently, option C incorrectly describes the function of RI.
Official Reference: 3GPP TS 38.214, Section 5.2.1, CSI Reporting , including CRI, RI, LI, PMI, and CQI reporting quantities.
21. Frage
Which of the following parameters are included in the measurement target IE of the 5G measurement configuration message?
Select All that Apply
Antwort: B,C,D
Begründung:
In 5G NR, Radio Resource Control (RRC) measurement configuration enables the UE to evaluate serving and neighboring cells for mobility, beam management, and radio-resource optimization.
Option A - Cell frequency: The intended parameter identifies the carrier frequency associated with the target cell or measurement configuration. This information allows the UE to determine the applicable frequency resources.
Option C - SMTC: SSB Measurement Timing Configuration specifies when the UE should perform SSB- based measurements. It defines the measurement-window periodicity, timing offset, and duration.
Option D - SSB frequency: The SSB frequency identifies the frequency location of synchronization signals that the UE must detect and measure.
Option B - Serving cell offset: Serving-cell offsets are used in measurement-event evaluation and reporting criteria. They are not part of the target-identification fields described by the intended question.
The standardized NR MeasObjectNR information element explicitly includes ssbFrequency and smtc1 , but does not define a separate field literally named Cell frequency within that structure.
Therefore, A, C, and D represent the intended Huawei-oriented answer.
Official Reference: 3GPP TS 38.331, Section 6.3.2, MeasObjectNR Information Element ; Section 5.5, Measurements .
Technical warning / qualification: The exact measurement target IE referenced by the question is not identified. While C and D are directly supported by the NR measurement-object specification, option A requires confirmation against the intended Huawei signaling definition. The answer is provisional rather than fully verified.
22. Frage
For a Huawei base station, when the PDCCH rate-matching function is disabled, the PDCCH occupies the full bandwidth in the frequency domain.
Antwort: A
Begründung:
The intended answer is True, based on the behavior described for Huawei's rate-matching-pattern- configuration-based PDCCH resource-management feature.
The Physical Downlink Control Channel (PDCCH) carries Downlink Control Information (DCI), including uplink grants, downlink scheduling assignments, and relevant control indications.
In standardized NR operation, PDCCH transmission resources are organized through Control Resource Sets (CORESETs).
A CORESET defines the applicable frequency-domain resources and time-domain duration for PDCCH monitoring and transmission.
Huawei's feature description distinguishes between operation with the specified PDCCH rate-matching function enabled and disabled.
When the feature is disabled, the documented Huawei implementation allows the PDCCH frequency-domain resource arrangement to extend across the configured cell bandwidth.
When the feature is enabled, the available PDCCH frequency-domain resource range may be restricted according to the corresponding configuration parameters.
This capability can be used to manage control-channel resource allocation and coordinate resource utilization with scheduled data transmissions.
However, the description must not be interpreted as stating that every individual PDCCH transmission occupies every Resource Block in the cell.
Actual PDCCH transmission remains governed by the applicable CORESET configuration, aggregation level, and Control Channel Element (CCE) allocation.
Therefore, option A is the intended Huawei implementation-specific answer.
Official Reference: Huawei, 5G RAN Channel Management Feature Parameter Description , Section 5, PDCCH Channel Management - PDCCH Frequency-Domain Resource Range ; 3GPP TS 38.211, Section
7.3.2, Physical Downlink Control Channel .
Technical warning / qualification: The Huawei-authored feature description supports this expected behavior, but an independently authenticated copy from Huawei's official documentation portal for the precise H35-581 V2.0 software release was not established. The answer must remain vendor-version-qualified rather than universally applicable to all NR base stations.
23. Frage
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