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| Section | Weight | Objectives |
|---|---|---|
| 5G Network Optimization | 35% | - Performance Analysis
|
| 5G Network Testing and Troubleshooting | 15% | - Fault Analysis
|
| 5G Network Planning and Design | 30% | - Site Engineering
|
| 5G Radio Network Planning Fundamentals | 20% | - 5G Network Architecture and Interfaces
|
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NEW QUESTION # 41
Which of the following cause values can be carried in the SCG failure information message?
Select All that Apply
Answer: A,C
Explanation:
Options A and B are correct because both SCG reconfiguration failure and an RLC maximum-retransmission condition are defined failure causes that can be reported through the Secondary Cell Group (SCG) failure information procedure.
In NR Dual Connectivity, the SCG represents the secondary radio resources provided by the Secondary Node.
When an SCG failure occurs, the UE may report the failure to the Master Node without immediately releasing the entire master connection.
Option A - SCG reconfiguration failure: This condition occurs when the UE cannot successfully apply an applicable RRC reconfiguration affecting the SCG. The standardized failure type is scg-reconfigFailure .
Option B - Maximum RLC retransmissions: When the SCG Radio Link Control (RLC) entity reaches its configured maximum retransmission threshold, the UE can initiate SCG failure reporting. The corresponding standardized failure type is rlc-MaxNumRetx .
Option C - T301 timeout: T301 is associated with RRC connection reestablishment. Its expiration is not defined as one of the listed SCG failure types.
Option D - SRB1 integrity check failure: The SCG failure procedure can report an SRB3 integrity failure, not the SRB1 condition specified in this option.
Therefore, A and B are the correct choices.
Official Reference: 3GPP TS 38.331, Section 5.7.3, SCG Failure Information Procedure , and Section 6.2.2, SCGFailureInformation Message and FailureType .
NEW QUESTION # 42
Which of the following PUCCH measurement counters is used for outer-loop power control on PUCCH?
Answer: D
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 # 43
The NG interface between the 5G gNodeB and the core network is IP-network based. Which of the following protocols is used on the control plane?
Answer: C
Explanation:
Stream Control Transmission Protocol (SCTP) is the correct answer because it provides the transport-layer signaling service used by the NG control-plane interface between the gNodeB and the 5G Core.
In 5G Standalone (SA) architecture, the NG interface consists of two principal components: NG-C and NG-U.
NG-C connects the NG-RAN node to the Access and Mobility Management Function (AMF) and carries Next Generation Application Protocol (NGAP) signaling.
NGAP supports procedures such as initial UE message transfer, UE context management, handover coordination, paging, and PDU session resource management.
According to 3GPP TS 38.412, NGAP messages are transported using SCTP over IP.
SCTP provides reliable message delivery, multiple independent streams, congestion control, and multihoming capabilities.
These characteristics are particularly useful for maintaining signaling reliability and transport-network resilience.
The remaining options have different functions.
UDP provides connectionless transport and is used beneath GTP-U for applicable user-plane traffic.
GTP-U carries user-plane packets between the NG-RAN and UPF over the NG-U interface.
X2-C identifies the LTE X2 control-plane interface rather than the NG control-plane transport protocol.
Therefore, SCTP is the correct choice for the NG-C transport layer.
Official Reference: 3GPP TS 38.412, Sections 4.1 and 7, NG Signalling Bearer Protocol Stack and Transport Layer ; TS 38.410, NG Interface General Aspects .
NEW QUESTION # 44
Which of the following statements correctly compare LTE PCI with NR PCI?
Answer: A
Explanation:
Option B is correct because LTE PCI planning commonly aims to assign different PCI modulo-3 values to adjacent cells where practical, reducing collisions involving the Primary Synchronization Signal (PSS).
LTE defines 504 physical cell identities, calculated using the primary and secondary synchronization identity components.
The primary synchronization identity has three possible values, corresponding to PCI modulo 3.
When adjacent LTE cells use the same PCI modulo-3 value, their PSS sequences are identical. This can complicate synchronization detection and potentially degrade cell-search performance under certain interference conditions.
Option A is incorrect because LTE Cell-specific Reference Signal (CRS) frequency-domain positioning is associated with PCI modulo 6, rather than modulo 3.
Option C is incorrect because neither LTE nor NR universally mandates different PCI modulo-30 values for adjacent cells.
NR physical-layer planning involves additional considerations, including SSB identity configuration, reference-signal mapping, and beam-related interference.
Option D incorrectly describes the LTE PSS.
LTE uses a Zadoff-Chu-based PSS sequence containing 62 elements. By contrast, NR PSS uses a length-127 m-sequence.
Therefore, B is the correct statement, although PCI modulo-3 separation is a radio-planning recommendation rather than an absolute requirement for every pair of adjacent LTE cells.
Official Reference: 3GPP TS 36.211, Sections 6.10.1 and 6.11.1, LTE Reference Signals and PSS ; TS
38.211, Section 7.4.2, NR Synchronization Signals .
NEW QUESTION # 45
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 # 46
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