The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 21, 2021
Filed:
Apr. 14, 2020
Electronics and Telecommunications Research Institute, Daejeon, KR;
Hyun Seo Park, Daejeon, KR;
Yun Joo Kim, Seongnam-si, KR;
Eunkyung Kim, Daejeon, KR;
Tae Joong Kim, Daejeon, KR;
An Seok Lee, Daejeon, KR;
Yu Ro Lee, Daejeon, KR;
Sung Cheol Chang, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
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.