This means that, advantageously, the radio network control node is not even made aware of a duplication being performed and it is hence not involved at all in {HEAD ~ any duplication operations} at {TAIL ~ handovers} etc 
This means that , advantageously , the radio network control node is not even made aware of a duplication being performed and it is hence not involved at all in { HEAD ~ any duplication operations } at { TAIL ~ handovers } etc
OTH OTH OTH OTH OTH OTH OTH OTH 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 HEAD REL TAIL TAIL TAIL TAIL TAIL OTH