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| Section | Objectives |
|---|---|
| Software Management | - Base Station Software Operations
|
| 5G RAN Products and Solutions Management | - Network Connectivity and Access
|
| Configuration Management | - Parameter Administration
|
| Remote Operations of 5G Radio Access Networks | - 5G RAN Operations Center Procedures
|
| Fault and Alarm Management | - Monitoring and Troubleshooting
|
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NEW QUESTION # 23
During PCI planning for a dense cluster of 5G cells, why is it important to avoid assigning PCI values that result in the same PCI modulo group (such as the same PCI mod 3 value) to closely located neighboring cells?
Answer: C
Explanation:
The Physical Cell Identity has mathematical relationships - such as PCI mod 3 and PCI mod 30 - that determine which specific resource elements certain reference signal sequences are mapped to within the radio frame. When two closely located, mutually visible cells share the same PCI mod 3 group, their reference signals for that group occupy the same time-frequency resources, increasing the likelihood of mutual interference on those reference signals. This can degrade channel estimation and measurement accuracy for UEs near the cell edge between the two cells, indirectly impacting handover performance and link quality.
Careful PCI planning therefore considers not just avoiding direct PCI collisions (identical PCI on neighbors) but also distributing PCI mod group assignments across a cluster to minimize this reference signal overlap.
PCI mod values have no bearing on software versioning, bandwidth limits, or Tracking Area grouping, which are configured through entirely separate parameters.
NEW QUESTION # 24
A NOC engineer needs to recover a base station from a state where its parameter settings have been corrupted, but the underlying software load is functioning correctly. Which type of backup would be most directly applicable to resolving this specific issue?
Answer: A
Explanation:
When the issue is specifically that parameter/configuration data has become corrupted while the underlying software load remains functional, the most directly applicable recovery resource is a configuration backup - which contains the parameter settings (cell configuration, neighbor relations, transport settings, and so on) independent of the software image. Restoring from a configuration backup can address the corrupted settings without the additional time and disruption of reinstalling or reactivating software, which would be unnecessary in this scenario since the software itself is not the problem. Configuration data is a distinct dataset from the software image, not embedded within it, which is precisely why configuration-only backups exist as a lighter-weight option for scenarios like this. Alarm history and PM counter exports are records of operational events and measurements respectively - neither contains the parameter configuration data needed to restore an element's settings, making them unsuitable for this recovery scenario.
NEW QUESTION # 25
Why does Nokia recommend configuring automatic session timeout (inactivity logout) for remote management sessions to AirScale base stations?
Answer: A
Explanation:
Automatic session timeout is a fundamental security control for remote management sessions. If an engineer leaves an authenticated session open and unattended - for example, stepping away from a workstation - anyone with physical or logical access to that workstation could potentially view sensitive configuration data or, more seriously, make unauthorized changes to a live base station, which could impact network stability, security, or subscriber service. Automatically terminating idle sessions after a defined inactivity period minimizes this exposure window. This control is unrelated to site power consumption and does not cause the base station itself to restart - only the management session is closed, while the BTS continues normal operation. It also has no effect on a cell's radio coverage area, which is determined entirely by RF design and configuration parameters such as transmit power and antenna settings.
NEW QUESTION # 26
Why do NOC teams typically schedule software activation activities - which require a base station restart - for late-night or off-peak hours rather than during the day?
Answer: A
Explanation:
Activating new software on a base station typically requires the affected unit (or units) to restart, which causes a brief interruption to service for any UEs connected through that cell during the restart. To minimize the impact of this unavoidable interruption, NOC teams schedule such activities during maintenance windows that coincide with periods of lowest network traffic - commonly late at night or in the early morning hours - when the fewest subscribers are likely to be actively using the network. This reduces the number of dropped sessions and the overall visibility of the brief outage to end users. There is no technical restriction preventing restarts during daylight hours, nor does activation duration meaningfully change based on time of day, and NetAct does not impose a blanket restriction on when configuration changes can be submitted - the scheduling decision is an operational best practice driven by minimizing customer impact, not a technical limitation.
NEW QUESTION # 27
What is the function of cell reselection priority parameters configured for idle-mode UEs across different frequency layers (e.g., 5G vs. 4G, or different 5G bands)?
Answer: B
Explanation:
Cell reselection priority parameters are broadcast to idle-mode UEs and inform them how to prioritize different frequency layers (such as a 5G band versus an LTE band, or multiple 5G bands) when more than one suitable cell is available for camping. By assigning higher reselection priority to certain layers, an operator can influence idle-mode UE distribution - for example, encouraging UEs to camp on a 5G layer where available to ensure faster initial access to 5G services, or directing UEs away from a layer that is being prepared for maintenance. These parameters work alongside reselection thresholds and timers that prevent excessive reselection (ping-ponging) between layers. They do not control network registration eligibility (which depends on subscription and PLMN matching), transmit power limits (a separate RF parameter), or encryption key management (a security function handled through different mechanisms), but they play an important role in idle-mode load distribution and user experience from the moment a device wakes up.
NEW QUESTION # 28
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