vplmn handover between via handover proxy node

A handover A between VPLMN via handover proxy node The present invention, MN from the source network to a method for performing a handover of the mobile node to the target network (MN), in the method, handover proxy node (HPN) is the one of the cells that are measured before It is used to relay the handover. MN discovers the appropriate HPN, by reporting with ID of HPN measurements as handover destination, to trigger a handover to HPN. HPN is, when receiving the handover start message for handover to the HPN to the MN, HPN does not advance the handover, the handover informs the handover of the MN from HPN to the target base station It is configured. Immediately after receiving the handover start message in the target network, system resources, for data transfer between the source network and the target network, configured for data paths used by the MN to connect to the target base station It is.