To find where subscribers are experiencing degraded QoS in the RAN, identify the root-causes, and view actionable fix recommendations provided by the Uhana by VMware platform, use the Focus menu and Alerts dashboard. To understand how Uhana uses AI to generate these actionable alerts, see Understanding AI-based RAN alerts.
The following topics describe how to use the Focus page.
This topic describes how to search and filter alerts along various dimensions in the Focus page. Use the following figure to understand the various components on the Alerts dashboard.
|Alerts map||Visualize where subscribers have poor experience|
|Alerts summary||Summary of number of alerts, impacted sessions and cells|
|Alerts breakdown||Pie chart showing breakdown of alerts per root cause|
|Alerts table||List of alerts sorted by number of impacted sessions|
The map in the Focus page has the same functionality as the Explore page. The clusters and cells on the map are colored by number of subscriber sessions that have degraded experience due to RAN root-causes. See Using the map for details.
The Search Alerts panel in the Focus page is used to query alerts along additional dimensions apart from time and geography. Clicking on the Search Alerts panel shows the following drop-down menu.
Make your selections and click Apply for viewing alerts.
This topic describes the different components in the Focus page that are relevant to visualizing alerts.
This section provides a summary of the alerts for the given user selection.
The alerts table provides a list of alerts generated by the system. Each alert indicates a specific subscriber impacting problem in the system that has a unique fix. An alert can impact multiple cells and last over a long period of time. The Uhana by VMware system automatically takes care of aggregating alerts across space and time to minimize the number of alerts generated.
The alerts table is paginated with a default of 25 alerts per page which can be configured using the Alerts per page drop-down menu at the bottom of the Focus page.
Each alert in the table consists of the following fields.
This topic describes how to analyze alerts using their respective visibility and insights pages. These pages are specific to the root cause of the alert and will describe the analysis workflow for each root cause.
These alerts are generated when subscribers experience poor service due to high uplink interference.
The visibility KPIs for uplink interference alerts are the same as the Interference KPIs in the Explore page.
For uplink interference alerts where the root cause is Uplink interference: External, the Uhana by VMware system triangulates the location of the external interference source. The insights page for such alerts displays a map with a set of polygons indicating the search areas where an operator can dispatch a field technician to hunt for the external interference source. The polygons are colored from dark red to yellow. Darker the color, higher the likelihood of the external interference source to be present in that polygon.
For uplink interference alerts caused by an Unknown root causes, the insights page provides a heatmap view of uplink interference per PRB for additional investigation.
The insights page for all uplink interference alerts contains a form for the operator or field technician to provide feedback on observations and actions taken for the alert. This form contains the following fields.
This information is used by the Uhana by VMware system to measure the accuracy of the generated alerts and retrain AI models used for generating alerts.
These alerts are generated when subscribers experience poor service due to an abnormal imbalance in the load among different cells that are within their coverage.
The visibility KPIs for load imbalance alerts are the same as the Sector KPIs in the Explore page.
The insights page for load imbalance alerts shows the Control Channel Utilization chart indicating imbalance in control channel load among different cells in the sector for which the alert is generated. This can be used for additional investigations.
These alerts are generated when subscribers experience poor service due to abnormally low signal strength relative to other users in the network.
The following KPIs are displayed in the visibility page for coverage alerts.
The insights page for coverage alerts indicates the cell where adjusting the antenna tilt or increasing the transmission power could result in resolving the coverage issue.