A plurality of data blocks is received over {TAIL ~ a transmission time interval} and the count of {HEAD ~ data blocks} is stored in memory 
A plurality of data blocks is received over { TAIL ~ a transmission time interval } and the count of { HEAD ~ data blocks } is stored in memory
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH