Semi-persistent CSI-RS Activation in Secondary Cell

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Solution Overview

Problem

The activation of a secondary cell (SCell) in wireless communication systems introduces latency due to the need for multiple messages to activate the channel state information (CSI) and transmission configuration indicator (TCI) states, which increases higher-layer overhead and processing delays.

Innovation Solution

Implementing a direct SCell activation method that includes a semi-persistent CSI-RS resource set, allowing a single command to activate both the SCell and its associated CSI-RS, thereby eliminating the need for separate messages to activate the TCI state and CSI reporting configuration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate messages are used to activate SCell, CSI reporting configuration, and TCI state, then complete activation functionality is achieved, but latency and higher-layer overhead increase

Engineering Contradiction:

Improveactivation functionalityVSAvoidactivation latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent combines multiple activation functions into a single SCell activation message. This message simultaneously activates the SCell, configures CSI reporting, and activates the TCI state, eliminating the need for separate messages and reducing activation latency while maintaining complete functionality

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The SCell activation message is designed as a multi-functional command that performs multiple operations: activating the secondary cell, configuring channel state information reporting, and activating transmission configuration indicator states. This universal message structure reduces overhead and processing delays

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If multiple messages are transmitted for SCell activation, then complete configuration is achieved, but higher-layer overhead increases

Engineering Contradiction:

Improveconfiguration completenessVSAvoidmessage overhead

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges multiple configuration messages into a single unified SCell activation message. This consolidated message contains all necessary configuration elements (SCell activation, CSI reporting configuration, TCI state activation) thereby reducing higher-layer overhead and simplifying the message structure

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20240056150A1Semi-persistent channel state information reference signal activation in a direct secondary cell activation

Publication Date: 2024.02.15 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a secondary cell activation command that indicates a semi-persistent channel state information (CSI) reference signal (CSI-RS) resource set of a secondary cell. The UE may receive, from the secondary cell, a semi-persistent CSI-RS using the semi-persistent CSI-RS resource set based at least in part on receiving the secondary cell activation command. Numerous other aspects are provided.