Event Detection in a Data Stream

A method (100) for performing event detection on a data stream is disclosed, the data stream comprising data from a plurality of devices connected by a communications network. The method comprises using an autoencoder to concentrate information in the data stream, wherein the autoencoder is configured according to at least one hyperparameter (110) and detecting an event from the concentrated information (120). The method further comprises generating an evaluation of the detected event on the basis of logical compatibility between the detected event and a knowledge base (130), and using a Reinforcement Learning (RL) algorithm to refine the at least one hyperparameter of the autoencoder, wherein a reward function of the RL algorithm is calculated on the basis of the generated evaluation (140). Also disclosed are a system (900) for performing event detection, and a method (1100) and node (1200) for managing an event detection process.