The increase in the size and complexity of the cellular network is progressively complicating the operation and maintenance activities, as well as rising its operation cost. The growing complexity of the networks makes them more prone to failures, which can degrade the quality of experience (QoE) of the network users. In this way, to prevent the degradation of QoE, network operators are focusing on creating networks with self-healing functions, which are capable of automatically troubleshooting problems, making them more reliable and reducing their operation costs. For this matter, unsupervised Machine Learning (ML) algorithms are deployed to detect anomalous network status, however, these frequently lack explanation and network experts are required for this step. For this matter, the proposed paper presents a method to determine the relevant Key-Performance Indicators for any unsupervised clustering to facilitate the explanation of the clusters.
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