The invention relates to a method for ensuring IP session continuity upon a handover of a mobile node to a non-3GPP network, wherein an ongoing IP session of the mobile node goes via a packet data network gateway. The device can be any type of physical object and includes an address pattern statically printed thereon or generated in the background of a display. The maintaining includes setting the state to a value indicating continuity of the MA if a converged notification is received from the first MEP. The magnetic circuit rotates into alignment with the helical ribbon.