METHODS AND NETWORK NODES FOR ENHANCED MOBILITY BETWEEN MOBILE COMMUNICATIONS NETWORKS

摘要

The disclosure relates to methods, a wireless device, a radio access node and computer programs for improving wireless device mobility between a first radio access network arranged to operate according to a first radio access technology and a second radio access network arranged to operate according to a second radio access technology. In particular, the disclosure relates to handover preparation procedure to improve handover of a wireless device (20) connected to a first radio access network (11) arranged to operate according to a first radio access technology to a second radio access network (12) arranged to operate according to a second radio access technology. The handover preparation procedure includes the sending of a handover prepare message (S47) from an access node (30) of a first radio access network to a connected wireless device (20). The wireless device prepares for handover by means of preparation signaling (S48) to access points of one or more second radio access networks indicated in the handover prepare message. The wireless device (20) informs the access node (30) upon concluding the handover preparation. Actual handover is ordered by means of a handover message (S52).