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