The invention relates to a method providing a multicast or broadcast service to (the user of) a mobile terminal via a radio access network of a mobile communication system. The multicast or broadcast service is associated to a plurality of bearers for providing the multicast or broadcast service: Further, the invention relates to a mobile terminal for providing a multicast or broadcast service to a user, and to a network entity for providing a multicast or broadcast service to a mobile terminal via a radio access network of a mobile communication system. To enable the correct reception of the broadcast or multicast service at the mobile terminal, the invention proposes to provide the mobile terminal with information on the individual (layered/alternative/complementary) bearers' relationships. The bearers' relationships are provided in service description information for the multicast or broadcast service which indicates the bearers associated to the multicast or broadcast service and predetermined bearer combinations among the plurality of bearers.