Invention Grant
- Patent Title: CSI feedback overhead reduction for FD-MIMO
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Application No.: US15544370Application Date: 2015-01-19
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Publication No.: US10735070B2Publication Date: 2020-08-04
- Inventor: Chao Wei , Wanshi Chen , Peter Gaal , Yu Zhang
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Norton Rose Fulbright LLP
- International Application: PCT/CN2015/070985 WO 20150119
- International Announcement: WO2016/115654 WO 20160728
- Main IPC: H04B7/06
- IPC: H04B7/06 ; H04B7/0456 ; H04L5/00 ; H04W72/04 ; H04W88/02

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.
Public/Granted literature
- US20170353222A1 CSI FEEDBACK OVERHEAD REDUCTION FOR FD-MIMO Public/Granted day:2017-12-07
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