receiving {HEAD ~ the transport control protocol acknowledgement} from {TAIL ~ the terminal}, wherein the received TCP acknowledgement includes the sequence number and corresponds to a certain time 
from
receiving { HEAD ~ the transport control protocol acknowledgement } from { TAIL ~ the terminal } , wherein the received TCP acknowledgement includes the sequence number and corresponds to a certain time
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH