Type II CSI port selection codebook enhancement with partial reciprocity

US12088388B2 · kind B2 · utility

Assignee

• Apple Inc. · US

Inventors

• Haitong Sun · Cupertino, US
• Weidong Yang · San Diego, US
• Yushu Zhang · Beijing, CN
• Wei Zeng · Saratoga, US
• Dawei Zhang · Saratoga, US
• Yuchul Kim · San Jose, US
• Hong He · Sunnyvale, US
• Chunhai Yao · Beijing, CN
• Chunxuan Ye · King of Prussia, US
• Oghenekome Oteri · San Diego, US
• Ghaith N. Hattab · Santa Clara, US
• Ismael Gutierrez Gonzalez · San Jose, US
• Jie Cui · San Jose, US
• Yang Tang · Pleasanton, US
• Yeong-Sun Hwang · Germering, DE

Key dates

• Filing date: Feb 12, 2020
• Grant date: Sep 10, 2024
• Expiry date: Nov 15, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L25/0224
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

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.