NRN-522専門知識内容 & NRN-522技術試験

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Nokia NRN-522 Exam Syllabus Topics:

SectionObjectives
5G RAN Systems and Fault Management- Software and configuration management
  • 1. Base station software management
    • 2. Configuration parameter updates in live networks
      - Alarm and fault handling
      • 1. Fault detection and diagnosis in RAN nodes
        • 2. Troubleshooting operational issues
          Network Operations in 5G RAN- Remote operation of 5G Radio Access Network
          • 1. Apply standard parameter configuration changes
            • 2. Manage base station software lifecycle
              • 3. Connect to Nokia 5G RAN products and solutions
                • 4. Retrieve faults and alarms
                  - Operations Center procedures
                  • 1. Coordinate with technical support teams for issue resolution
                    • 2. Support network operation center workflows

                      >> NRN-522専門知識内容 <<

                      NRN-522技術試験、NRN-522学習資料

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                      Nokia 5G RAN Network Operations Expert 認定 NRN-522 試験問題 (Q60-Q65):

                      質問 # 60
                      A NOC team is investigating a degradation in E-RAB / QoS flow setup success rate for a specific gNB.
                      Which approach is MOST effective for identifying the root cause?

                      正解：A

                      解説：
                      Investigating a degradation in E-RAB or 5G QoS flow setup success rate for a specific gNB is most effectively approached by correlating multiple data sources covering the affected time period: checking active alarms on that gNB (hardware, transport, or signaling faults), reviewing the configuration management audit trail for any recent parameter change that coincided with the degradation, and examining relevant performance counters such as resource availability/congestion indicators, transport interface statistics, and signaling success/failure counts. This multi-source correlation identifies whether the degradation stems from a hardware fault, a configuration error, a capacity constraint, or a transport issue, enabling targeted remediation. Reviewing only high-level summary reports lacks the technical granularity required. Restarting NetAct is a drastic, unfocused action unrelated to a single gNB's issue and risks disrupting network-wide monitoring. Assuming the cause is always subscriber devices, without first checking network-side data, skips the most relevant and controllable areas of investigation.


                      質問 # 61
                      A NOC engineer observes an 'alarm storm' - dozens of alarms appearing within seconds across multiple cells served by the same site. What is the MOST likely explanation?

                      正解：C

                      解説：
                      An 'alarm storm' - many alarms appearing across multiple cells at a single site within a short window - is a classic indicator that a shared resource serving all of those cells has failed. Multiple cells at a site commonly depend on the same System Module (baseband), the same transport connection back to the aggregation/core network, the same power supply, or the same synchronization source; a failure in any one of these shared elements can simultaneously impact every dependent cell, producing a burst of correlated alarms.
                      Recognizing this pattern allows the NOC engineer to search for a single common-cause fault - for example, a transport outage or System Module failure - rather than treating each cell's alarms as independent issues requiring separate investigation. It is extremely unlikely that multiple independent hardware faults occur simultaneously by coincidence, and such patterns should never be dismissed as a routine NetAct bug or simply ignored.


                      質問 # 62
                      A cell repeatedly raises and clears 'Cell Unavailable' alarms. Performance data shows PRB utilization dropping to zero during exactly the same periods. Which area should be investigated FIRST as the likely root cause?

                      正解：B

                      解説：
                      When a cell repeatedly raises and clears 'Cell Unavailable' alarms, and PRB utilization simultaneously drops to zero during exactly those same intervals, this pattern strongly indicates the cell is genuinely going out of service intermittently, rather than a display or reporting artifact. The investigation should focus on causes capable of producing repeated, short-duration outages: transport link instability (brief link flaps causing loss of the cell's connectivity), loss of synchronization reference (particularly significant for TDD 5G, where sync loss can force a cell to stop transmitting to avoid interference), or unexpected hardware resets/restarts of the baseband or radio unit, potentially linked to environmental issues such as overheating or power fluctuations.
                      NetAct UI theme settings, subscriber handset models, and the billing system are entirely unrelated to RAN service availability and would not explain this correlated alarm and KPI pattern. Correlating alarm timing with PM data and environmental/transport alarms is a key NOC diagnostic technique.


                      質問 # 63
                      What is the function of the p-Max parameter broadcast by a 5G cell?

                      正解：D

                      解説：
                      The p-Max parameter is broadcast as part of the cell's system information and specifies the maximum transmit power a UE is allowed to use when transmitting on the uplink within that cell. This is a key input to the UE's uplink power control algorithm and serves several purposes: it helps manage uplink interference toward neighboring cells (particularly important in dense deployments or where uplink interference from high-power UEs could degrade performance for users in adjacent cells), and it can also be used to comply with regulatory power limits for a given frequency band or deployment scenario. This parameter governs UE behavior on the uplink and is distinct from configuredMaxTxPower, which governs the gNB's own downlink transmit power. It also has no relationship to the maximum number of connected UEs (a capacity/licensing consideration) or to the cell's configured bandwidth, which are controlled by separate parameters entirely.


                      質問 # 64
                      In NetAct Performance Management, what is a 'measurement job'?

                      正解：C

                      解説：
                      In NetAct Performance Management, a 'measurement job' is a configured task that specifies which performance counters or KPIs should be collected, from which network elements (such as specific base stations or cells), and at what collection interval - for example, every 15 minutes or hourly. These jobs are the mechanism by which raw counter data is gathered from the RAN and made available for KPI calculation, reporting dashboards, and threshold-based alerting. Without properly configured measurement jobs covering the relevant counters and elements, the performance data needed to assess network health and detect KPI degradation would simply not be collected. This is distinct from a field technician's scheduled maintenance task, a software upgrade package (a Software Management concept), or a user account (an access control concept) - a measurement job specifically governs the automated, ongoing collection of performance statistics within the PM functional area.


                      質問 # 65
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