CSI Process Configuration for Throughput Improvement

Solution Overview

Problem

In communication systems like LTE, base stations face challenges in determining the channel state with multiple transmit antennas or varied antenna arrangements, leading to limited throughput improvement and coverage enlargement.

Innovation Solution

The implementation of a base station and terminal apparatus communication method that configures multiple CSI processes, allowing for the selection of Precoding Index Matrix Indicators (PMIs) based on associations between different CSI processes, enabling improved channel state information acquisition and transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If many transmit antennas or various antenna arrangements are used, then throughput and coverage can be improved, but the base station cannot know the channel state accurately

Engineering Contradiction:

ImprovethroughputVSAvoidchannel state knowledge

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent segments the channel state information acquisition into multiple independent CSI processes, each associated with different antenna ports or antenna groups. This allows the base station to separately measure and evaluate channel states for different antenna configurations, making it feasible to manage channel state knowledge in systems with many transmit antennas by dividing the measurement task across multiple processes.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a new dimension for channel state measurement by associating PMI from one CSI process with another CSI process. This cross-process PMI association creates an additional dimension for evaluating channel quality, enabling the base station to assess channel states more comprehensively across different antenna arrangements without being limited by single-process measurements.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Area of stationary object

If many transmit antennas or various antenna arrangements are used, then coverage enlargement can be improved, but the base station cannot know the channel state accurately

Engineering Contradiction:

ImprovecoverageVSAvoidchannel state knowledge

Core Design Contradiction:

Area of stationary objectVSMeasurement precision

Solution Approach 1:

The patent segments the channel state information acquisition into multiple independent CSI processes, each associated with different antenna ports or antenna groups. This allows the base station to separately measure and evaluate channel states for different antenna configurations, making it feasible to manage channel state knowledge in systems with many transmit antennas by dividing the measurement task across multiple processes.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a new dimension for channel state measurement by associating PMI from one CSI process with another CSI process. This cross-process PMI association creates an additional dimension for evaluating channel quality, enabling the base station to assess channel states more comprehensively across different antenna arrangements without being limited by single-process measurements.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Measurement precision

If multiple CSI processes are configured with PMI association, then channel state awareness is improved, but system complexity increases

Engineering Contradiction:

Improvechannel state awarenessVSAvoidsystem complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-configuring PMI associations between different CSI processes through higher layer signaling. This allows the terminal to pre-calculate and report PMI based on assumed channel states, reducing the real-time processing complexity at the base station while maintaining accurate channel state awareness through the pre-established PMI relationships.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11368959B2Base station apparatus, terminal apparatus, and communication method

Publication Date: 2022.06.21 SHARP KK

AI summary

The present invention provides a base station apparatus, a terminal apparatus, and a communication method, which are capable of throughput improvement. A base station apparatus that communicates with a terminal apparatus, includes a higher layer processing unit that configures a CSI process that is a configuration relating to reporting of a channel state information (CSI), for the terminal apparatus for which a prescribed transmission mode is configured, in which the CSI process includes a configuration of a CSI reference signal and a configuration relating to two different code books. A terminal apparatus that communicates with a base station apparatus, includes a higher layer processing unit for which a CSI process that is a configuration relating to reporting of channel state information (CSI) is configured by the base station apparatus, and a transmission unit that transmits the CSI based on the CSI process, in which the CSI information includes a configuration of a CSI reference signal and a configuration relating to two different code books.