Abstract: A method for obtaining an identifier of a new cell in a radio communication system is provided. The method includes receiving information associated with the new cell from a user equipment (UE), obtaining an evolved universal terrestrial radio access (EUTRA) cell global identifier (ECGI) of the new cell, if it is determined based on the information associated with the new cell that the new cell is not set as a neighbor cell, determining whether a public land mobile network (PLMN) identifier (ID) (PLMN ID) in the ECGI is included in a relation table including at least one of PLMN IDs and shared PLMN IDs, and receiving an identifier of the new cell from a server, if the PLMN ID in the ECGI is included in the relation table.

Abstract: A method for obtaining an identifier of a new cell in a radio communication system is provided. The method includes receiving information associated with the new cell from a user equipment (UE), obtaining an evolved universal terrestrial radio access (EUTRA) cell global identifier (ECGI) of the new cell, if it is determined based on the information associated with the new cell that the new cell is not set as a neighbor cell, determining whether a public land mobile network (PLMN) identifier (ID) (PLMN ID) in the ECGI is included in a relation table including at least one of PLMN IDs and shared PLMN IDs, and receiving an identifier of the new cell from a server, if the PLMN ID) in the ECGI is included in the relation table.

Abstract: A method for acquiring a cell identifier by a source cell in a radio communication system is provided. The method includes receiving information about a new cell from a User Equipment (UE) in the source cell, acquiring an Evolved Universal Terrestrial Radio Access (EUTRA) Cell Global Identifier (ECGI) of the new cell from the UE, if it is determined based on the information about the new cell that there is no neighbor relationship with the new cell, determining whether a Public Land Mobile Network (PLMN) Identifier (ID) (PLMN ID) in the ECGI is included in a mapping table between a primary PLMN ID and a shared PLMN ID, and acquiring an X2 Internet Protocol (IP) address of the new cell from an Evolved Packet Core (EPC) according to the determination results.

Abstract: A method for acquiring a cell identifier by a source cell in a radio communication system is provided. The method includes receiving information about a new cell from a User Equipment (UE) in the source cell, acquiring an Evolved Universal Terrestrial Radio Access (EUTRA) Cell Global Identifier (ECGI) of the new cell from the UE, if it is determined based on the information about the new cell that there is no neighbor relationship with the new cell, determining whether a Public Land Mobile Network (PLMN) Identifier (ID) (PLMN ID) in the ECGI is included in a mapping table between a primary PLMN ID and a shared PLMN ID, and acquiring an X2 Internet Protocol (IP) address of the new cell from an Evolved Packet Core (EPC) according to the determination results.

Abstract: A mobility supporting method and a mobility supporting system using the method are provided. The mobility supporting method includes a first access router for allocating a prefix to a mobile terminal, and registering the allocated prefix in an authentication server when the mobile terminal connects to the first access router. There is also the authentication server for verifying the mobile terminal based on the registered prefix, and reporting a result of the verifying of the mobile terminal to a second access router when the mobile terminal moves to connect to the second access router and the second access router for notifying the reported result of the verifying the mobile terminal to the first access router.

Abstract: A vertical handover method and apparatus in a wireless communication system are provided, in which a serving network selects a target network for a vertical handover of a terminal from among at least one candidate target network to which the terminal can perform the vertical handover, transmits information about the selected target network to the terminal, and requests the vertical handover of the terminal to the target network, the target network acquires a profile of the terminal from a policy store, upon receipt of the vertical handover request from the serving network, the terminal requests a connection to the target network, and the target network transmits information about a router to which the terminal will connect to the terminal, upon receipt of the connection request from the terminal and updates a proxy binding for the terminal in the policy store.

Abstract: Provided is a method, apparatus and system for assigning an IP address in a communication system based on a Media Independent Handover (MIH). In the method, information about a neighbor network is obtained through an MIH service. In the event of a handover to a heterogeneous network, one or more New Care of Addresses (NCoAs) are generated using the information about the neighbor network. The generated NCoA is transmitted to a candidate network through the MIH service. A Duplicate Address Detection (DAD) operation is performed on the NCoA.

Abstract: A vertical handover method and apparatus in a wireless communication system are provided, in which a serving network selects a target network for a vertical handover of a terminal from among at least one candidate target network to which the terminal can perform the vertical handover, transmits information about the selected target network to the terminal, and requests the vertical handover of the terminal to the target network, the target network acquires a profile of the terminal from a policy store, upon receipt of the vertical handover request from the serving network, the terminal requests a connection to the target network, and the target network transmits information about a router to which the terminal will connect to the terminal, upon receipt of the connection request from the terminal and updates a proxy binding for the terminal in the policy store.

Abstract: A mobility supporting method and a mobility supporting system using the method are provided. The mobility supporting method includes a first access router for allocating a prefix to a mobile terminal, and registering the allocated prefix in an authentication server when the mobile terminal connects to the first access router. There is also the authentication server for verifying the mobile terminal based on the registered prefix, and reporting a result of the verifying of the mobile terminal to a second access router when the mobile terminal moves to connect to the second access router and the second access router for notifying the reported result of the verifying the mobile terminal to the first access router.