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| Section | Objectives |
|---|---|
| Topic 1: Configuration Management | - Parameter Administration
|
| Topic 2: 5G RAN Products and Solutions Management | - Network Connectivity and Access
|
| Topic 3: Software Management | - Base Station Software Operations
|
| Topic 4: Remote Operations of 5G Radio Access Networks | - 5G RAN Operations Center Procedures
|
| Topic 5: Fault and Alarm Management | - Monitoring and Troubleshooting
|
我々社はNokia NRN-522問題集をリリースされる以来、たくさんの好評を博しました。試験に合格したお客様は「NRN-522問題集のオンライン版を利用して、模擬試験を繰り返して受けました。無事試験に合格しました。Fast2testから大変助かりました。」と感謝します。あなたの支持こそ我々は最も高品質のNokia NRN-522問題集を開発して努力します。
質問 # 91
A NOC engineer is investigating subscriber complaints of being unable to access data services even though their devices show a strong 5G signal and successfully camp on the cell. Which KPI should the engineer examine first to determine whether the issue lies in establishing the data bearer itself?
正解：B
解説：
If a device successfully camps on a cell and shows strong signal levels but cannot access data services, the issue most likely lies beyond the initial radio connection - specifically in establishing the data bearer (PDU session in 5G, analogous to E-RAB in 4G) required to carry user-plane traffic to the core network. The PDU Session/E-RAB Setup Success Rate KPI directly measures how often these bearer establishment procedures succeed, and a low value points to problems such as core network signaling failures, transport issues toward the user-plane gateway, configuration mismatches, or resource allocation failures at the RAN. Cell Availability simply confirms the cell is operational, Handover Success Rate is only relevant once a session is active and mobility occurs, and strong RSRP only confirms good radio coverage - none of these directly explain a failure to establish the data session itself, making the PDU Session/E-RAB Setup Success Rate the correct first KPI to examine.
質問 # 92
What does the NR-ARFCN (NR Absolute Radio Frequency Channel Number) represent in a 5G cell's configuration?
正解：D
解説：
The NR Absolute Radio Frequency Channel Number (NR-ARFCN) is a standardized numbering scheme defined for 5G NR that maps specific numeric values to corresponding carrier frequencies across the supported frequency range. When configuring a cell, the NR-ARFCN value (rather than specifying the frequency directly in MHz) is used to unambiguously identify the exact carrier frequency the cell will operate on, ensuring consistency across equipment from different vendors and alignment with regulatory frequency allocations. Correct NR-ARFCN configuration is essential for frequency planning, neighbor relation setup (since inter-frequency relations reference the target cell's frequency), and avoiding interference with adjacent operators or bands. This parameter is unrelated to subscriber database identifiers, alarm counts, or PRB utilization, all of which are tracked through entirely separate configuration management, fault management, or performance management mechanisms respectively.
質問 # 93
Which AirScale management tool allows an engineer to connect directly to a single base station for local-level configuration viewing and diagnostics, as opposed to network-wide centralized management?
正解：D
解説：
The BTS Site Manager, also referred to as the local Element Manager, is the tool used to connect directly to an individual AirScale base station to view its local configuration, hardware inventory, logs, and run element- level diagnostics. It is typically used when an engineer needs granular, site-specific information that may not be fully visible through the centralized system, or when NetAct connectivity to the site is impaired. NetAct CM Editor is used for network-wide configuration management of many sites from the central OSS, NetAct PM Reports aggregates performance counters across the network, and the SON Network Optimizer automates parameter tuning across multiple cells. Because the question specifically asks about direct, single-element access for local diagnostics rather than network-wide operations, the BTS Site Manager is the correct answer, complementing NetAct in a complete remote operations toolkit.
質問 # 94
A NOC engineer reviewing UE measurement reports notices that two physically adjacent 5G cells are broadcasting the identical Physical Cell Identity (PCI), causing UEs to receive ambiguous reference signals.
What is this condition called, and what is the appropriate remote corrective action?
正解：D
解説：
A PCI collision occurs when two neighboring (geographically adjacent or mutually visible) cells are configured with the same Physical Cell Identity, causing UEs to be unable to reliably distinguish between them based on their synchronization and reference signals. This leads to degraded reference signal measurements, failed handovers, and potential interference between the two cells' signals. This is distinct from PCI confusion, where two non-adjacent cells that share a PCI are both neighbors of a third common cell, creating ambiguity during handover target selection even though the two same-PCI cells are not directly adjacent. The correct remediation for a PCI collision is a PCI replanning exercise, reassigning one of the conflicting cells to a unique PCI value that avoids both direct reuse with its neighbors and problematic modulo relationships that affect reference signal sequences. This is typically performed remotely via configuration management without requiring a site visit.
質問 # 95
What is the primary purpose of performing a configuration audit that compares a live network element's current parameter settings against an approved configuration baseline or template?
正解：B
解説：
A configuration audit compares the actual, currently applied parameter settings on a live network element against a reference baseline or approved configuration template that represents the intended, standardized configuration for that element type or role. The primary purpose of this comparison is to detect configuration drift - differences that may have arisen from unauthorized manual changes, incomplete rollbacks, errors during bulk updates, or undocumented local modifications. Identifying such deviations is important for maintaining configuration integrity across the network, ensuring consistent behavior across similar cells, supporting troubleshooting (since unexpected parameter values are a common root cause of localized issues), and meeting internal governance or regulatory compliance requirements around change control. This process is distinct from performance monitoring (PRB utilization, handover success rate), which relies on PM counters, and from fault management, which tracks active alarms - configuration audits specifically address the state of configuration parameters themselves.
質問 # 96
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