Multiplexing CSI Reports in Random-Access Messages

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Solution Overview

Problem

Current wireless communication systems face challenges in efficiently providing channel state information (CSI) in random-access messages, which affects link adaptation and device/network performance.

Innovation Solution

A method and system for wireless communication that involve a scheduled entity receiving a downlink reference signal, obtaining CSI, selecting an uplink resource, multiplexing a CSI report with a random-access message, and transmitting the multiplexed information to the scheduling entity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If CSI reporting is delayed until after random-access procedure completion, then random-access message transmission is simplified, but link adaptation efficiency deteriorates

Engineering Contradiction:

Improvelink adaptation efficiencyVSAvoidCSI reporting delay

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by having the scheduled entity obtain and report CSI during the random-access procedure itself, rather than waiting until after completion. The scheduled entity receives downlink reference signals, obtains CSI, and multiplexes the CSI report with the random-access message in advance, enabling the scheduling entity to perform link adaptation earlier in the communication process.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If CSI is multiplexed with random-access message, then CSI reporting efficiency is improved, but message complexity increases

Engineering Contradiction:

ImproveCSI reporting efficiencyVSAvoidmessage processing complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent applies merging by combining the CSI report with the random-access message into a single multiplexed transmission. The scheduled entity multiplexes the CSI report comprising channel state information with the random-access message related to the random-access procedure, allowing both information types to be transmitted together on the selected uplink resource, reducing overall signaling overhead and improving reporting efficiency.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12342386B2Method for providing channel state information in random-access messages

Publication Date: 2025.06.24 QUALCOMM INC

AI summary

Technologies and techniques for wireless communication between a scheduled entity and a scheduling entity in a wireless communication network. A scheduled entity receives a downlink (DL) reference signal (RS) from the scheduling entity on a channel between the scheduling entity and the scheduled entity. The scheduled entity obtains channel state information (CSI) for the channel between the scheduling entity and the scheduled entity using the received DL RS, selects an uplink resource associated with a random-access procedure, and multiplexes a CSI report including the CSI with a random-access message related to the random-access procedure to produce multiplexed information.