Service dependency management for virtualized networks

This invention relates to a management apparatus (SDM) for dynamically adapting the deployment of network elements (NE 1 , NE 2 , NE 3 ) of a network (N) onto a underlying virtual infrastructure, the network providing at least a service made of one or several functions (F 11 , F 12 , F 13 ... F 34 ) linked by a service graph (SC) and provided by said network elements. The management apparatus comprises: - A data collector (CD) for receiving measurements (M) from the underlying virtual infrastructure; - An analysis module (AM) for, from said measurements, detecting a change related to a function among the one or several functions and determining adaptation actions (A) according to dependencies information (DI) related to dependencies between said functions; - An action dispatcher (AD) for transmitting (S 4 ) these adaptation actions toward said underlying virtual infrastructure for adapting the deployment.