Patent ID: 9019887
Filing Date: 2015-04-28
Classification: H04W

Abstract:
1. A method for an access control by a mobility management entity (MME) in a wireless communication system, the method comprising: receiving a first message including an attach request message of a terminal and a closed subscriber group identifier (CSG ID) from a base station; determining whether CSG subscription information for the terminal is valid based on the CSG ID received from the base station; if there is no valid CSG subscription information for the terminal, requesting the CSG subscription information from a home subscriber server (HSS), and receiving the CSG subscription information from the HSS; checking whether the CSG ID is contained in the CSG subscription information in the MME; transmitting a second message including an attach accept message to the base station if the CSG ID is contained in the CSG subscription information; and transmitting a third message including an attach reject message to the base station if the CSG ID is not contained in the CSG subscription information, wherein the attach request message is a non access stratum (NAS) message and includes an identifier of the terminal.