Patent ID: 9167486
Filing Date: 2015-10-20
Classification: H04L,H04W

Abstract:
1. A method for performing a seamless handover of a mobile node from a source network to a target network, wherein a handover proxy node is located in a further network, the method comprising the steps of: initiating a handover procedure of the mobile node from the source network to the handover proxy node, using an identifier of the handover proxy node and without using an identifier of the target network, and without completing handover of the mobile node to the handover proxy node, relaying by the handover proxy node to the target network control signaling related to the initiated handover procedure, using the identifier of the target network, previously received by the handover proxy node, in order to perform a seamless handover of the mobile node from the source network to the target network, wherein the step of initiating the handover procedure comprises the following steps: deciding by the mobile node to perform a handover to the target network, transmitting a handover trigger message from the mobile node to a source base station to which the mobile node is connected in the source network, indicating the handover proxy node as the destination of the triggered handover, and transmitting by the source base station a handover initiation message towards the handover proxy node, upon receiving the handover trigger message, and wherein the step of relaying by the handover proxy node the control signaling comprises the steps of: receiving in the handover proxy node a handover initiation message indicating a handover of the mobile node from the source network to the handover proxy node, adapting by the handover proxy node the handover initiation message to indicate a handover of the mobile node from the handover proxy node to the target network, using the identifier of the target network, and transmitting by the handover proxy node the adapted handover initiation message towards a target base station in the target network.