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