The UE transmits {TAIL ~ one combined message} of an AS control message and a NAS control message including {HEAD ~ information} indicating transmission of an SIP message, thereby having an effect on an upper node to reduce a delay due to message processing 
The UE transmits { TAIL ~ one combined message } of an AS control message and a NAS control message including { HEAD ~ information } indicating transmission of an SIP message , thereby having an effect on an upper node to reduce a delay due to message processing
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH