Abstract: A method for managing a request to activate a packet data session for a user terminal capable of transmitting and receiving data over a communications network organized into network slices. The user terminal includes a subscription identifier for at least one of the slices of the network. The method is implemented by at least one network device and includes: receiving a request to activate a packet data session from the user terminal for a network slice, the activation request including an identifier of the requested slice, which is obtained from a parameter comprising one or more user-subscribed slice identifiers; obtaining, from the subscription identifier, an item of information for determining an authorization for the requested slice; verifying the authorization for the requested slice taking into account the item of information and, if the verification is negative, rejecting the request to activate a packet data session for the requested slice.

Abstract: A database (51) accessible in an IMS network and including at least one record including: an identifier of a terminal (10) in a transport plane; an identifier of said terminal (10) in a signaling plane; and at least one address of a quality of service and charging control entity (40) in said network.

Abstract: A database (51) accessible in an IMS network and including at least one record including: an identifier of a terminal (10) in a transport plane; an identifier of said terminal (10) in a signaling plane; and at least one address of a quality of service and charging control entity (40) in said network.