Method for discovering handover function of mobile communication network, system for discovering handover function of mobile communication network, user apparatus, program and computer program product

摘要

The present invention relates to a method for discovering a handover function of a mobile communication network, wherein the mobile communication network comprises a core network and a radio access network, wherein a user equipment joins the mobile communication network using a first radio access technology. Connectable and the user equipment can connect to the mobile communication network using a second radio access technology, the method comprising the following steps:-the user equipment obtains handover capability information from the mobile communication network Receiving and using the first or second radio access technology for the user equipment to communicate with the core network--if using the first radio access technology, the user equipment The handover function information received from the first Initiating a handover from the first radio access technology to the second radio access technology only when indicating a function of the mobile communication network that supports handover from the line access technology to the second radio access technology; and / or Or--if the second radio access technology is used, the user equipment is mobile whose handover capability information received from the mobile communication network supports a handover from the second radio access technology to the first radio access technology. Initiating a handover from the second radio access technology to the first radio access technology only when indicating a function of the communication network.