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| Section | Weight | Objectives |
|---|---|---|
| Performance Troubleshooting | 20-25% | - Optimization case studies - Troubleshooting tools utilization - Common performance issues diagnosis - Root cause analysis methodologies - Network failure identification and resolution |
| SRAN Architecture and Fundamentals | 15-20% | - Radio access concepts and principles - SRAN network architecture overview - SRAN solution components and functions - Single RAN integration principles |
| Radio Network Performance Monitoring | 20-25% | - Real-time network monitoring techniques - Performance monitoring tools and dashboards - KPI definition and measurement - Threshold configuration and alerting - Performance data collection and analysis |
| Radio Network Optimization Techniques | 25-30% | - Interference analysis and mitigation - Handover optimization - Capacity optimization strategies - Coverage optimization methods - Parameter tuning best practices - Load balancing techniques |
| SRAN Optimization Tools and Reports | 10-15% | - Nokia NetAct and performance tools - Configuration management for optimization - Automated optimization features - Report generation and interpretation |
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NEW QUESTION # 19
When selecting an LTE anchor layer for EN-DC , why is it important to check 3GPP band combinations ?
Answer: C
Explanation:
The correct answer is B .
In 5G NSA EN-DC , the UE connects to LTE as the Master Cell Group , or anchor, and NR as the Secondary Cell Group . Not every LTE band can be paired with every NR band. The supported LTE-NR combinations are defined by 3GPP band-combination rules and must also be supported by the UE chipset and device capability.
For example, an operator may have LTE Band 3, Band 7, or Band 20 and NR n78, but only certain LTE-NR combinations may be valid for EN-DC. If the selected LTE anchor band is not supported in combination with the NR band, the UE will not be able to establish EN-DC even if LTE and NR coverage both exist.
Option C is not correct because dual-uplink support depends on UE capability and specific band-combination support; it cannot be guaranteed for all UE models. Option A and D are unrelated to the main purpose of checking 3GPP band combinations.
So the correct reason is:
To ensure that LTE and NR bands are compatible and allowed as EN-DC pairs.
NEW QUESTION # 20
At which mark are all conditions fulfilled for energy saving , so the cell will be switched off? Refer to the image below.
Answer: C
Explanation:
The correct answer is B , which corresponds to mark C in the diagram.
In the diagram, the energy-saving process follows these stages:
Before mark B , the cell is entering the power-saving period, but the required load condition has not yet been satisfied for the required duration.
At mark B , the measured load has gone below the configured threshold, but the cell is not switched off immediately. The system must confirm that the load remains below the required threshold for the configured time.
At mark C , the load has stayed below the required threshold for the required duration, shown as 5 minutes in the diagram. At this point, all conditions are fulfilled, and the cell can be switched off. The diagram also shows the state becoming:
energySavingState = energySaving
Marks D and E are already inside or near the later part of the power-saving period. Mark E is associated with operator suspension/exit behavior, not the initial moment when all switch-off conditions are first fulfilled.
NEW QUESTION # 21
Identify the missing network components X, Y, and Z in the architecture diagram.
Answer: D
Explanation:
The correct answer is B .
In the 5G Core , component X is connected to:
N2 from NG-RAN
N11 toward SMF
N15 toward PCF
N26 toward the EPC mobility entity
These are typical interfaces of the AMF , or Access and Mobility Management Function . Therefore, X = AMF .
In the EPC , component Z is connected to:
S1-MME from eNB
S11 toward the gateway
N26 toward the 5GC AMF
These are typical interfaces of the MME , or Mobility Management Entity . Therefore, Z = MME .
Component Y is outside the core user-plane path and represents the external service network connected through N6/SGi , commonly shown as IMS in voice-service architecture diagrams. Therefore, Y = IMS .
So the correct mapping is:
X: AMF, Y: IMS, Z: MME.
NEW QUESTION # 22
Which of the following statements about CBRA , or contention-based random access , is correct?
Answer: C
Explanation:
The correct answer is B .
In contention-based random access , the UE chooses a random access preamble by itself from a configured pool of available contention-based preambles. This is typically used when the UE does not yet have a dedicated connection or when the network has not assigned a dedicated preamble.
Because multiple UEs may choose the same preamble at the same time, preamble collision is possible . That is why CBRA requires a contention resolution step.
Option C describes contention-free random access , not CBRA. In contention-free random access, the network assigns a dedicated preamble to the UE, so collision risk is avoided and contention resolution is not required.
Option A is not the correct CBRA principle being tested. RACH false detection can be a receiver/design issue, but it does not define the CBRA procedure.
Option D describes a possible NSA signaling behavior around access failure handling, but it is not the core correct definition of CBRA.
Therefore, the correct CBRA statement is:
The UE autonomously selects a preamble from the configured range and starts the random access procedure.
NEW QUESTION # 23
During an intra-gNB DU handover , what is the role of the RRC Reconfiguration message sent by the gNB- CU to the UE?
Answer: C
Explanation:
The correct answer is A .
During an intra-gNB DU handover , the UE is moved from one cell/DU resource to another under the same gNB-CU control. The gNB-CU coordinates the handover preparation and sends an RRC Reconfiguration message to the UE.
The role of this message is to provide the UE with the required handover command information, such as:
Target PCell configuration
Radio resource configuration
Mobility control information
Random access configuration, when needed
Measurement or reconfiguration-related information
After receiving the RRC Reconfiguration , the UE performs the handover execution procedure toward the target cell and later responds with RRC Reconfiguration Complete .
Option B is incorrect because admission control and source-cell scheduling suspension are internal network- side procedures, not the UE-facing role of the RRC Reconfiguration message.
Option C is not the best answer because user-plane resource transfer is handled between gNB-CU/gNB-DU functions, while dedicated preamble allocation may be part of the configuration but is not the main purpose of the message.
Option D is incorrect because RLC reestablishment and PDCP recovery are lower-layer/user-plane handling actions, not the primary purpose of the RRC Reconfiguration message.
Therefore, the correct role is:
It instructs the UE to perform handover to the target PCell and provides measurement/configuration information.
NEW QUESTION # 24
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