As described above, in accordance with the present invention, it is possible to provide a mobile station that can conceal {HEAD ~ the AC} of the mobile station UE from {TAIL ~ the MMTEL/IMS layer function}, and at the same time, perform SSAC barring in the MMTEL/IMS layer function 
As described above , in accordance with the present invention , it is possible to provide a mobile station that can conceal { HEAD ~ the AC } of the mobile station UE from { TAIL ~ the MMTEL / IMS layer function } , and at the same time , perform SSAC barring in the MMTEL / IMS layer function
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