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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: 5G Radio Network Planning | 10% | - Link budget calculation - Coverage and capacity planning - Parameter planning and configuration - Interference analysis and mitigation |
| Topic 2: 5G RAN Feature Application | 35% | - Carrier aggregation and dual connectivity - Power control and load balancing - Energy saving and coverage enhancement features - Mobility management and handover optimization |
| Topic 3: 5G Radio Network Optimization | 20% | - Coverage, capacity, and quality optimization - Drive test and signaling tracing - Performance indicator analysis - Fault diagnosis and troubleshooting |
| Topic 4: 5G Radio Network In-depth Principles | 30% | - 5G spectrum and frame structure - 5G NR protocol stack and signaling procedures - Massive MIMO and beamforming principles - 5G NR air interface fundamentals |
| Topic 5: 5G Industry Applications & Private Network Solutions | 5% | - Private 5G network requirements and design - Vertical industry scenarios and KPI requirements |
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NEW QUESTION # 21
After a UE has accessed an LTE network, which of the following conditions must be satisfied for the eNodeB to send 5G B1 measurement configuration messages?
Select All that Apply
Answer: A,B,C
Explanation:
Options A, B, and C describe the principal eligibility and configuration requirements for initiating NR inter- RAT measurements in an E-UTRA-NR Dual Connectivity (EN-DC) deployment.
In NSA architecture, the LTE eNodeB operates as the Master Node and controls the initial measurement and secondary-node addition procedures.
Option A: The core network must permit the UE to use the applicable dual-connectivity service. Subscription restrictions and network indications can prevent the eNodeB from enabling NR secondary connectivity.
Option B: The UE must report capabilities compatible with EN-DC operation. The relevant capability framework was introduced in 3GPP Release 15, although the precise supported band combinations and EN- DC capability fields determine actual eligibility.
Option C: The LTE network must have the necessary dual-connectivity functionality enabled, together with appropriate neighboring NR frequency and measurement configurations. Incorrect frequency information can prevent the UE from measuring the intended NR cells.
Option D: The UMPTa is a Huawei hardware-board designation. The standardized B1 measurement configuration procedure does not require this specific board model. Hardware compatibility depends on the actual Huawei product and software release.
Therefore, A, B, and C represent the intended operational conditions, while D incorrectly introduces a specific hardware model as a universal requirement.
Official Reference: 3GPP TS 37.340, E-UTRA and NR Multi-Connectivity , EN-DC Architecture and Secondary Node Addition; TS 36.331, Inter-RAT Measurement Configuration .
Technical warning / qualification: The precise Huawei NSA feature-switch and board-compatibility conditions require the relevant equipment-version documentation; 3GPP establishes the general signaling requirements.
NEW QUESTION # 22
Which of the following parameters determines the PRACH time-domain position?
Answer: A
Explanation:
The PRACH configuration index determines the time-domain opportunities available for Physical Random Access Channel (PRACH) preamble transmission.
PRACH is used during initial network access, applicable mobility procedures, and other operations requiring uplink synchronization or random-access signaling.
In NR, random-access occasions must be configured so that the UE knows when and where it is permitted to transmit a PRACH preamble.
The prach-ConfigurationIndex parameter identifies an entry in the standardized random-access configuration tables.
These tables specify characteristics including the PRACH preamble format, applicable system-frame periodicity, subframe or slot location, starting symbol, and number of time-domain PRACH occasions.
The remaining parameters control different aspects of random access.
Option A - Logic root sequence: The logical root sequence index determines the Zadoff-Chu root sequence used for PRACH preamble generation.
Option B - Frequency offset: The frequency-domain configuration determines the placement of PRACH resources within the available uplink bandwidth.
Option C - Ncs: The cyclic-shift parameter determines the cyclic-shift spacing used to generate different preamble sequences from a common root sequence.
These parameters affect PRACH sequence generation or frequency-domain placement, rather than identifying its scheduling opportunities in time.
Therefore, option D is correct.
Official Reference: 3GPP TS 38.211, Section 6.3.3.2, PRACH Mapping to Physical Resources , Tables
6.3.3.2-2 through 6.3.3.2-4.
NEW QUESTION # 23
Which of the following PUCCH measurement counters is used for outer-loop power control on PUCCH?
Answer: C
Explanation:
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.
NEW QUESTION # 24
In NSA networking, which procedure is initiated by a UE when a 5G cell change fails?
Answer: B
Explanation:
The Secondary Cell Group (SCG) failure information procedure is initiated when a UE detects a qualifying failure associated with its NR secondary connection during Non-Standalone (NSA) operation.
In E-UTRA-NR Dual Connectivity (EN-DC), the LTE eNodeB functions as the Master Node, while the NR gNodeB provides secondary radio connectivity.
The NR Primary Secondary Cell (PSCell) serves as the principal serving cell within the SCG.
When a PSCell change fails, the UE may detect an SCG reconfiguration-with-synchronization failure or another relevant SCG failure condition.
Rather than immediately reestablishing the entire LTE master connection, the UE can report the SCG failure to the Master Node.
For EN-DC, the applicable reporting mechanism involves the SCGFailureInformationNR message transported using LTE RRC signaling.
The failure report can identify the failure type and provide available NR measurement information to assist diagnosis and recovery.
The Master Node may subsequently initiate SCG release, modification, or another appropriate recovery procedure.
Options A and B describe connection-establishment or reestablishment procedures rather than the specific reporting action required for an SCG failure.
Option C, MR, represents measurement reporting and is not the dedicated SCG failure notification mechanism.
Therefore, option D is correct.
Official Reference: 3GPP TS 36.331, Section 5.6.13a, NR SCG Failure Information ; TS 38.331, Section
5.7.3, SCG Failure Information .
Technical warning / qualification: The original options use RPC instead of the standardized abbreviation RRC . The wording has been preserved, but options A and B should be corrected before publication.
NEW QUESTION # 25
Which of the following MCS indices is required for 256QAM scheduling in downlink peak-rate testing?
Answer: C
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 # 26
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