Invention Grant
- Patent Title: Mobility management for inter-gNB (next generation node-b) handover in new radio (NR) systems
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Application No.: US16419245Application Date: 2019-05-22
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Publication No.: US11190989B2Publication Date: 2021-11-30
- Inventor: Alexander Sirotkin , Xu Zhang , Jaemin Han , Feng Yang , Honglei Miao , Jerome Parron , Markus Dominik Mueck , Jing Zhu , Ellen Liao , Jeongho Jeon , Youn Hyoung Heo , Anthony Lee , Seau S. Lim , Marta Martinez Tarradell , Meghashree Dattatri Kedalagudde , Puneet Jain , Bharat Shrestha
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Kowert, Hood, Munyon, Rankin & Goetzel, P.C.
- Main IPC: H04W36/00
- IPC: H04W36/00 ; H04W36/08 ; H04B17/318 ; H04W80/02 ; H04W76/27 ; H04W80/08

Abstract:
A Next Generation Node-B (gNB) and methods of communication are generally described herein. The gNB is configurable to operate as a source gNB. The gNB is configured with logical nodes including a gNB central unit (gNB-CU) and a gNB distributed unit (gNB-DU). The gNB-CU comprises a gNB-CU control plane (gNB-CU-CP) for control-plane functionality, and a gNB-CU user plane (gNB-CU-UP) for user-plane functionality. When a handover of a User Equipment (UE) from the source gNB to a target gNB is performed, the gNB transfers, from the gNB-DU to the gNB-CU-UP, a downlink data delivery status (DDDS) message to indicate that the gNB-CU-UP is to stop transfer, to the gNB-DU, of downlink data intended for the UE.
Public/Granted literature
- US20190342800A1 MOBILITY MANAGEMENT FOR INTER-GNB (NEXT GENERATION NODE-B) HANDOVER IN NEW RADIO (NR) SYSTEMS Public/Granted day:2019-11-07
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