Thus high priority services can pre empt {HEAD ~ the usage} of {TAIL ~ wireless resources} by low priority services 
of
Thus high priority services can pre empt { HEAD ~ the usage } of { TAIL ~ wireless resources } by low priority services
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH