公开(公告)号：US20190200273A1

公开(公告)日：2019-06-27

申请号：US15851935

申请日：2017-12-22

Applicant: Nokia Technologies Oy

Inventor： Klaus I. Pedersen ,  Daniela Laselva ,  Nurul Mahmood

IPC: H04W40/12 ,  H04L12/823 ,  H04L29/06

CPC classification number: H04W40/12 ,  H04L1/189 ,  H04L47/32 ,  H04L69/22 ,  H04L69/321 ,  H04W76/15 ,  H04W88/02

Abstract: An anchor node receives a packet, duplicates the packet to form two copies, flags each of two data units, each comprising one of the copies, with a duplication flag indicating the corresponding data unit comprises a copy. The anchor node sends one of the two data units through protocol layers towards transmission to a UE, and sends another of the two data units over a network interface and towards one or more duplicating nodes. A duplicating node receives in the data unit a copy of the packet. The duplicating node forwards the data unit with the packet to a first of multiple protocol layers toward transmission via an air interface toward the UE. The duplicating node discards, in the first protocol layer or in a layer lower than the first, the packet in response to receiving an ACK that a copy of the packet was successfully received by the UE.