Rabin & Berdo, P.C.
Method of transmitting low-latency data during handover in communication system, and apparatus therefor
An operation method of a terminal performing handover in a mobile communication system may comprise transmitting packet data convergence protocol (PDCP) downlink reception status information of the terminal and information on a target base station to a source base station; receiving downlink data from a user plane function (UPF) via the source base station based on a first tunnel configured between the source base station and the UPF; receiving downlink data from the UPF via the target base station based on a second tunnel configured by the UPF between the target base station and the UPF by using the PDCP downlink reception status information and the information on the target base station, which are transferred from the source base station; and discarding duplicated-received protocol data units (PDUs) from the source base station and the target base station, and reordering remaining PDUs.
Electronics and Telecommunications Research Institute
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Yu Ro Sung Cheol Yun Joo Tae Joong Eunkyung Hyun Seo An Seok
Lee Chang Kim Kim Kim Park Lee