Invention Grant
- Patent Title: Channel state information feedback for semi-open-loop and open-loop schemes
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Application No.: US17887958Application Date: 2022-08-15
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Publication No.: US11863272B2Publication Date: 2024-01-02
- Inventor: Chenxi Hao , Juan Montojo , Yu Zhang , Chao Wei , Wanshi Chen
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Holland & Hart
- Priority: WO TCN2017088607 2017.06.16
- Main IPC: H04B7/06
- IPC: H04B7/06 ; H04W76/27 ; H04W72/23

Abstract:
The described techniques relate to improved methods, systems, devices, or apparatuses that support channel state information feedback for semi-open-loop and open-loop schemes. The described techniques provide for a user equipment (UE) to determine an open-loop, semi-open-loop, or closed-loop transmission scheme for deriving channel quality information (CQI). In the case of determined open-loop transmission scheme, the UE may select a transmission scheme corresponding to a time offset value and a precoder cycling granularity value. The UE may determine one or more of a time offset value, a precoder cycling granularity value, and a precoding matrix indicator (PMI) for a channel state information (CSI) report, and generate CQI accordingly. Additionally, the UE may include the determined values in the CSI report to indicate the transmission scheme used for the CQI derivation. Based on the CQI, the base station can then determine the transmission scheme and perform link adaption accordingly.
Public/Granted literature
- US20220399924A1 CHANNEL STATE INFORMATION FEEDBACK FOR SEMI-OPEN-LOOP AND OPEN-LOOP SCHEMES Public/Granted day:2022-12-15
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