Method for reducing the time spent for comparing a closed subscriber group identity, CSG ID, with an allowed CSG list

摘要

A method for reducing the time spent for CSG identity comparison for a mobile device in a wireless communication system is disclosed. The method includes the steps of including RAT information in an Allowed CSG list and an Operator CSG List, wherein the Allowed CSG list and the Operator CSG List are stored in an elementary file of the mobile device and the RAT information indicates a plurality of RATs associated with a plurality of CSG identities listed in the allowed CSG list; controlling a non-access stratum (NAS) layer of the mobile device to read the allowed CSG list and the operator CSG List comprising the RAT information from the elementary file and pass the allowed CSG list and the operator CSG list comprising the RAT information to the AS layer; maintaining a plurality of sub-allowed CSG lists in an access stratum (AS) layer of the mobile device according to the plurality of RATs, wherein the number of the sub-allowed CSG lists corresponds to the number of the RATs; and comparing a CSG identity associated with a first RAT with the CSG identities listed in a first sub allowed CSG list corresponding to the first RAT.