Patent ID: 8483684

Claim:
A method for processing changes in a closed subscriber group (CSG) subscription in a wireless communication system, the method comprising: receiving, by a non-access stratum (NAS) layer of a mobile terminal, an NAS message from a network, wherein the NAS message indicates an expiration of the CSG subscription for a CSG cell, wherein the NAS message is received during a CSG service provided from the CSG cell; announcing, by the NAS layer of the mobile terminal, the expiration of the CSG subscription to an access stratum (AS) layer of the mobile terminal; transmitting by the AS layer of the mobile terminal, the expiration of the CSG subscription to the CSG cell; receiving, by the NAS layer of the mobile terminal, a radio resource control (RRC) connection release message from the CSG cell after transmitting the expiration of the CSG subscription, wherein the RRC connection release message includes a release cause field indicating the expiration of the CSG subscription; and performing, by the AS layer of the mobile terminal, a cell reselection after receiving the RRC connection release message.