Finnish operator Elisa has been particularly advance in its use of SON (self-optimizing networks), and particularly willing to share its experiences. It has worked closely with Nokia’s Eden Rock business, and is now also trialling technology from new SON vendor Spectrum Effect, which was founded by one of the former Eden Rock leaders. But Elisa is going a step further, and commercializing its own inhouse SON developments. Spectrum Effect has been analyzing Elisa’s network, using its Spectrum-Net tools, which apply machine learning algorithms to mobile network data in order to detect, characterize, and localize RF interference. This process found “numerous instances of external and unintended internal RF interference, including previously undetectable passive intermodulation (PIM) interference,” according to Elisa’s head of…