If the message type information indicates {HEAD ~ an LTE connection request message} including SIP data, NAS control information of {TAIL ~ the NAS control message} is processed, an SIP data indicator and SIP data packet length information for the SIP data are extracted from the NAS control message, and the extracted information is analyzed 
If the message type information indicates { HEAD ~ an LTE connection request message } including SIP data , NAS control information of { TAIL ~ the NAS control message } is processed , an SIP data indicator and SIP data packet length information for the SIP data are extracted from the NAS control message , and the extracted information is analyzed
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