By adding time information to this identification information and by transmitting it to LMA/HA, {HEAD ~ MAG} can identify {TAIL ~ transmission time} of the BU message from this time information 
identify
By adding time information to this identification information and by transmitting it to LMA / HA , { HEAD ~ MAG } can identify { TAIL ~ transmission time } of the BU message from this time information
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH