Patent ID: 9510247
Filing Date: 2016-11-29
CPC Classification: H04W

Claim Text:
1. A mobile communication system comprising: at least one terminal; a source base station to which the terminal is connected before movement of the terminal; a target base station to which the terminal is connected after the movement of the terminal; a gateway device that connects the source base station and the target base station to a core network; and a core network node provided in the core network, wherein: the gateway device determines by itself, or makes query to the core network node to determine whether or not to preferentially treat the terminal by the target base station when the terminal moves from the source base station to the target base station the gateway device notifies to the target base station preferential information indicative of whether or not to preferentially treat the terminal by the target base station; the terminal holds an allowed list that is a list of closed subscriber group identification information on a base station to which the terminal is connectable; the gateway device comprises a determination table that prescribes eligibility of making query to the core network node and eligibility of notifying the preferential information to the target base station, in accordance with closed subscriber group identification information on the source base station, closed subscriber group identification information on the target base station, access modes of the source base station and the target base station, identification information on the terminal, and allowed list information indicative of whether or not the allowed list of the terminal includes the closed subscriber group identification information on the source base station; and the gateway device determines based on the determination table the eligibility of making the query to the core network node and the eligibility of notifying the preferential information to the target base station when the terminal moves from the source base station to the target base station.