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