Abstract: A method of performing inter-user equipment (UE) transfer (IUT) by an Internet protocol (IP) multimedia subsystem (IMS) network in an IMS-based network system is provided. The method includes receiving from a first UE a subscription message for requesting notification of state or capability information of another UE, transmitting to the first UE a subscription acceptance message in response to the subscription message, receiving from a second UE a control message comprising an IUT flag for indicating IUT enable or disable for media flows, and transmitting to the first UE a notification message comprising information on the second UE, if the IUT flag indicates IUT enable for the media flows. It is possible to decrease a signaling overhead caused by a failure of IUT of a media flow.

Abstract: Disclosed is a method in which in case where it is inappropriate for a particular Home (e)NodeB providing a service to a particular UE to continue to provide the service on the ground of a changed status, such as overload, temporary drop due to maintenance, expiry of CSG membership for the UE, increase of temporary interference, policy change, or the like, the Home (e)NodeB transmits information on a cause that the UE performs a handover to another base station to an control entity within a network. Furthermore, it is allowed for the entity within the network to store information on the cause. In addition, if the status of the particular Home (e)NodeB is changed, then the entity within the network is allowed to perform a reverse handover for the UE to the particular Home (e)NodeB on the basis of the information on the changed status and the information on the cause.

Abstract: A method for controlling access of a terminal to a Home (e)NodeB by a network entity, the terminal accessed to the Home (e)NodeB operated in a closed access mode or a hybrid access mode by using a specific closed subscriber group (CSG) ID, the method comprises: recognizing by the network entity, that an allowed access timer of the specific CSG ID with respect to the Home (e)NodeB has expired; transmitting an Update Bearer Request message to other network entity in order to change a membership of the expired CSG ID; transmitting a Bearer Modify Request message to the Home (e)NodeB in order to change a membership of the expired CSG ID; and updating a bearer with said other network entity, and a bearer with the Home (e)NodeB.

Abstract: An optimized paging method for a Home (e)NodeB system comprises: receiving, by a network entity, a notification message indicating whether downlink data for a terminal exists or not; determining, by the network entity, one or more Home (e)NodeBs to which a paging message is to be transmitted among one or more base stations included in a base station list for the terminal, based on an access mode of the Home (e)NodeB, and based on whether the terminal is a member of a Closed Subscriber Group (CSG) supported by the Home (e)NodeB; to transmitting, by the network, a paging message to the determined one or more Home (e)NodeBs or (e)NodeBs included in the base station list; and receiving, by the network, a paging response message from a specific (e)NodeB or Home (e)NodeB among the one or more (e)NodeBs or Home (e)NodeBs to which the paging message has been transmitted.