Invention Application
- Patent Title: Type II CSI Port Selection Codebook Enhancement with Partial Reciprocity
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Application No.: US17439179Application Date: 2020-02-12
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Publication No.: US20220166486A1Publication Date: 2022-05-26
- Inventor: Haitong Sun , Weidong Yang , Yushu Zhang , Wei Zeng , Dawei Zhang , Yuchul Kim , Hong He , Chunhai Yao , Chunxuan Ye , Oghenekome Oteri , Ghaith N Hattab , Ismael Gutierrez Gonzalez , Jie Cui , Yang Tang , Yeong-Sun Hwang
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- International Application: PCT/CN2020/074901 WO 20200212
- Main IPC: H04B7/06
- IPC: H04B7/06 ; H04B7/0417

Abstract:
A base station and wireless communication (UE) may perform type II CSI-RS port selection based at least on partial reciprocity between an uplink path and a downlink path between the base station and the UE. The base station may identify dominant signal paths between the base station and the UE, based on measurements performed during uplink transmissions, and may transmit, to the UE, corresponding information indicative of CSI measurement and reporting configuration that may include a single measurement resource or multiple measurement resources. Each measurement resource may include multiple-port CSI-RS ports. The UE may indicate, to the base station, selection of a measurement resource when multiple measurement resources are configured, and may also report layer independent or layer common selection of a subset of CSI-RS ports included in the indicated single measurement resource or multiple measurement resources. Further enhancements include frequency domain compression enhancement and dynamic codebook parameter reconfiguration.
Public/Granted literature
- US12088388B2 Type II CSI port selection codebook enhancement with partial reciprocity Public/Granted day:2024-09-10
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