when the determination result indicates that execution of the requested communication task cannot be extended, {HEAD ~ the processor} executes {TAIL ~ the requested communication task}, and 
executes
when the determination result indicates that execution of the requested communication task can not be extended , { HEAD ~ the processor } executes { TAIL ~ the requested communication task } , and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH