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