Sidelink Resource Selection for CSI Reporting in Wireless Systems

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Solution Overview

Problem

In wireless communication systems, there is a challenge in properly allocating sidelink resources for Sidelink Channel Status Information (SL CSI) reporting, which affects the efficiency of sidelink reporting procedures.

Innovation Solution

A method where a wireless device triggers SL CSI reporting and determines the creation of a sidelink grant based on available data, then selects a sidelink resource through a resource selection procedure to ensure efficient allocation for sidelink reporting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a sidelink resource is allocated for SL CSI reporting, then the CSI reporting can be performed properly, but resource allocation complexity increases

Engineering Contradiction:

ImproveCSI reporting reliabilityVSAvoidresource allocation complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The UE autonomously selects sidelink resources for CSI reporting without requiring network scheduling. The device monitors SL CSI reporting occasions, determines available resources based on its own buffer status and channel conditions, and selects appropriate resources independently, eliminating the need for complex network-side resource allocation mechanisms.

Inventive Principle:

Principle #25Self-service

2Productivity

If a resource selection procedure is implemented, then resource allocation efficiency improves, but system complexity increases

Engineering Contradiction:

Improveresource allocation efficiencyVSAvoidsystem complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The system pre-configures SL CSI reporting occasions and resource pools before actual reporting occurs. The UE prepares by monitoring these pre-defined occasions, building knowledge of available resources in advance, so that when CSI reporting is needed, resource selection can occur quickly using pre-established information rather than requiring complex real-time allocation procedures.

Inventive Principle:

Principle #10Preliminary action

3Loss of information

If SL CSI reporting is triggered, then channel status information is obtained, but resource allocation overhead increases

Engineering Contradiction:

Improvechannel status informationVSAvoidresource allocation overhead

Core Design Contradiction:

Loss of informationVSQuantity of substance

Solution Approach 1:

Instead of allocating dedicated resources for every possible SL CSI reporting occasion, the system uses partial action by allocating resources only when actually needed based on UE-triggered reporting requirements. The UE monitors SL CSI reporting occasions and only selects resources when there is actual CSI to report, avoiding waste of resources on unnecessary allocations and reducing overall overhead.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentEP4042825B1Method and apparatus for selecting a sidelink resource for a sidelink CSI reporting in a wireless communication system

Publication Date: 2024.06.19 LG ELECTRONICS INC

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AI summary

A method and apparatus for selecting a sidelink resource for a sidelink CSI reporting in a wireless communication system is provided. A first wireless device triggers the SL CSI reporting for the PC5-RRC connection. A first wireless device determines to create a sidelink grant corresponding to transmission of a single MAC PDU based on the triggered SL CSI reporting or a SL data available for transmission. A first wireless device triggers a resource selection procedure based on the determination. A first wireless device selects a sidelink resource in the resource selection procedure.