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Codebook restriction and subsampling for channel state information reporting

A technology of reporting and codebook set, applied in wireless communication, diversity/multi-antenna system, space transmit diversity, etc., can solve the problem of high delay

Active Publication Date: 2022-05-03
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the latency associated with the CSI reporting process may be high, which may be detrimental to wireless communication systems

Method used

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  • Codebook restriction and subsampling for channel state information reporting
  • Codebook restriction and subsampling for channel state information reporting
  • Codebook restriction and subsampling for channel state information reporting

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Embodiment Construction

[0040] Some wireless communication systems can support uplink and downlink communications between a base station and user equipment (UE). In some cases, it may be appropriate for the base station and UE to support techniques for providing feedback to each other in order to improve the quality of communications between the wireless devices. In one example, the UE may be configured to send a channel state information (CSI) report to the base station to allow the base station to identify an appropriate configuration for sending downlink signals to the UE. In some cases, the CSI may include a precoding matrix indicator (PMI) that identifies a preferred precoding matrix selected by the UE for use by the base station to precode downlink transmissions to the UE. The UE may select from a plurality of precoding matrices a preferred precoding matrix that may be used by the base station to precode downlink transmissions to the UE.

[0041] In some wireless communication systems (eg, fif...

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PUM

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Abstract

Methods, systems and devices for wireless communications are described. In some wireless communication systems, a base station may use a precoding matrix to precode downlink signals to be transmitted to user equipment (UE). The UE may select a precoding matrix from multiple precoding matrices (eg, codebooks) and report it to the base station in a Channel State Information (CSI) report. As described herein, a base station may support techniques for limiting the number of precoding matrices that a UE may evaluate to identify a preferred precoding matrix to be indicated to the base station. Additionally, the techniques described herein allow the base station to dynamically indicate the appropriate set of precoding matrices for the UE to evaluate based on the channel conditions at a given time.

Description

[0001] cross reference [0002] This patent application claims the benefit of U.S. Provisional Patent Application No. 62 / 562,091, filed September 22, 2017, by Hosseini et al., entitled "Codebook Restriction and Sub-Sampling for Channel State Information Reporting"; and by U.S. Patent Application No. 16 / 135,488, filed September 19, 2018, by Hosseini et al., entitled "Codebook Restriction and Sub-Sampling for Channel State Information Reporting"; each of which is assigned to the present application the assignee. technical field [0003] The following generally relates to wireless communications, and more specifically, the following relates to codebook restriction and subsampling for channel state information (CSI) reporting. Background technique [0004] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems are capable of supporting communication w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04B7/06
CPCH04B7/0482H04B7/0632H04B7/0643H04B7/0645H04B7/0626H04B7/0639H04W72/23H04B7/0456
Inventor S·侯赛尼A·法拉吉达纳A·萨海
Owner QUALCOMM INC