Gateway functionality for mobile relay system

An apparatus comprising

• at least one processor and at least one non-transitory memory including computer program code, the at least one non-transitory memory and computer program code configured to with the at least one processor cause the apparatus at least to:
• control one or more radio access connections for at least one station associated with a mobile relay system, the mobile relay system providing a plurality of access technologies and being served by one or more donor cellular systems;
• and
• control, by the mobile gateway communicating at least with the mobile relay system, address information of communication on the one or more radio access connections between the at least one station and one or more core network elements associated with the one or more donor cellular systems.