Patent · US Active

CSI feedback overhead reduction for FD-MIMO

US10735070B2 · kind B2 · utility

2Cited by

0References

8Claims

0Family size

Assignee

QUALCOMM Incorporated · US

Inventors

Chao WEI · Beijing, CN
Wanshi Chen · San Diego, US
Peter Gaal · San Diego, US
Yu Zhang · Beijing, CN

Key dates

Filing date	Jan 19, 2015
Grant date	Aug 4, 2020
Priority date	—
Expiry date	Mar 4, 2035

Classification

Technology area (CPC H)Electricity
CPC primaryH04W88/02
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

Mechanisms for reduction of channel state information (CSI) feedback overhead are disclosed for full dimensional multiple input, multiple output (FD-MIMO) systems with large dimension antenna ports. In one aspect, rank-dependent CSI antenna port measurements are used in order to limit the number of antenna ports for high rank CSI reporting. Another aspect allows a user equipment (UE) to select subband feedback for aperiodic CSI porting on an uplink shared channel when the UE is to report subband quality and precoding indicators. Another aspect provides for on-demand CSI feedback that dynamically configures CSI feedback parameters. To reduce the signaling overhead, the multiple parameter sets may be pre-configured with different values for dynamic reporting parameters.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.