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| Section | Weight | Objectives |
|---|---|---|
| SRAN Architecture and Fundamentals | 15-20% | - SRAN network architecture overview - SRAN solution components and functions - Single RAN integration principles - Radio access concepts and principles |
| Radio Network Performance Monitoring | 20-25% | - Real-time network monitoring techniques - Performance monitoring tools and dashboards - Performance data collection and analysis - Threshold configuration and alerting - KPI definition and measurement |
| SRAN Optimization Tools and Reports | 10-15% | - Report generation and interpretation - Nokia NetAct and performance tools - Configuration management for optimization - Automated optimization features |
| Performance Troubleshooting | 20-25% | - Common performance issues diagnosis - Network failure identification and resolution - Root cause analysis methodologies - Optimization case studies - Troubleshooting tools utilization |
| Radio Network Optimization Techniques | 25-30% | - Interference analysis and mitigation - Parameter tuning best practices - Handover optimization - Load balancing techniques - Capacity optimization strategies - Coverage optimization methods |
>> SRAN-Radio-Network-Performance-Optimizationテスト対策書 <<
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質問 # 13
In the case of 5G SA, which of the following triggers the Radio Link Failure, or RLF, handling mechanism?
正解：C
解説：
The correct answer is C.
In 5G SA, Radio Link Failure handling is mainly UE-driven. The UE monitors the radio link quality using lower-layer indications such as in-sync and out-of-sync indications. If the UE receives enough out-of-sync indications, it starts the relevant RLF timer, commonly associated with T310 behavior. If the link does not recover before the timer expires, the UE declares Radio Link Failure and starts recovery, such as RRC re- establishment.
The gNodeB can detect uplink problems and may release or reconfigure the UE, but the classical RLF handling mechanism is triggered at the UE side.
So the correct answer is:
UE indication timer only.
質問 # 14
A slice supporting sensors and smart meters would be categorized as:
正解：B
解説：
The correct answer is A .
Sensors and smart meters are typical massive IoT use cases. They usually involve a very large number of devices sending small amounts of data, often with low mobility and low power requirements.
This type of traffic fits mMTC , or massive Machine Type Communications .
Why the other options are not correct:
URLLC is used for very low-latency and highly reliable services, such as industrial automation, remote control, or mission-critical applications.
eMBB is used for high-throughput broadband services, such as video, fixed wireless access, or enhanced mobile internet.
DNN is not a slice category. It means Data Network Name and identifies the data network the UE connects to, similar to APN in LTE.
Therefore, a slice supporting sensors and smart meters is categorized as:
mMTC.
質問 # 15
Which parameter defines the PRACH format ?
正解：B
解説：
The correct answer is B .
The prachConfigurationIndex defines the PRACH configuration, including the PRACH time-domain occasions and the associated PRACH format according to the PRACH configuration tables. In 5G NR, PRACH configuration is based on 3GPP-defined PRACH tables, where the configuration index maps to the PRACH format and PRACH occasion structure.
The other options have different meanings:
A). msg1-FrequencyStart defines the frequency-domain starting position of PRACH occasion resources.
C). prachRootSequenceIndex defines the root sequence used for PRACH preamble generation.
D). totalNumberOfRAPreambles defines how many random access preambles are available.
Therefore, the parameter that defines the PRACH format is:
prachConfigurationIndex.
質問 # 16
Which of the following statements does not apply to mmWave radio propagation ?
正解：A
解説：
The correct answer is C .
At mmWave / FR2 frequencies , radio propagation is more challenging than in low-band or mid-band spectrum. Diffraction becomes weaker, blockage is more severe, foliage attenuation is high, and building penetration loss is significant. This is why mmWave networks usually require dense site grids, line-of-sight or near-line-of-sight paths, and strong beamforming. Industry mmWave references consistently describe high path loss, high penetration loss, and the need for directional antenna systems to compensate for these losses.
Option C does not apply because water absorption and atmospheric absorption generally become more relevant at higher frequencies, not lower. Rain, humidity, and oxygen/water-vapor absorption are important considerations for mmWave link budgets.
So the statement that does not apply to mmWave propagation is:
Low water absorption at high frequencies.
質問 # 17
Which port must be opened in NetAct for the connection from TraceSynthesis to NetAct?
正解：A
解説：
The correct answer is B .
The connection from TraceSynthesis to NetAct is typically based on secure web/API communication, which uses HTTPS . The standard HTTPS port is 443 . Therefore, port 443 must be opened in NetAct/firewall rules to allow TraceSynthesis to communicate with NetAct.
The other options are not the best answer:
8443 is often used as an alternative HTTPS/application-server port, but it is not the standard answer here.
22 is used for SSH, mainly for secure shell access or file transfer.
8080 is commonly used for unsecured HTTP or proxy/application access, not the secure NetAct connection expected here.
So the required port is:
443.
質問 # 18
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