The method 1, wherein the first power management event is a power down event and the second power management event is {HEAD ~ a power} up {TAIL ~ event} 
up
The method 1 , wherein the first power management event is a power down event and the second power management event is { HEAD ~ a power } up { TAIL ~ event }
OTH OTH OTH OTH OTH 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