SCI-Based Sidelink Resource Determination for Lower V2X Overhead

Solution Overview

Problem

There is no clear method for determining sidelink resources for data transmission and reception in wireless communications systems, particularly for advanced V2X services with strict Quality of Service requirements in NR sidelinks.

Innovation Solution

A method for determining sidelink resources is provided, involving the use of Sidelink Control Information (SCI) to indicate both frequency and time domain resources, allowing terminals to implicitly determine these resources without explicit overhead, by leveraging predefined or pre-configured relationships and indicators.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If explicit resource indication is used in SCI, then resource determination clarity is improved, but signaling overhead increases

Engineering Contradiction:

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent uses time-frequency resource indication information as an intermediary to indirectly indicate target resources. Instead of directly specifying resource locations, the SCI carries indication information that serves as a mediator between the transmitting terminal and the resource allocation, allowing receivers to determine resources through predefined relationships without explicit overhead

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent establishes predefined relationships between time-frequency resources of SCI and target resources in advance. These preliminary configurations allow terminals to automatically determine resource locations based on the indication information and predefined rules, eliminating the need for real-time explicit resource specification while maintaining determination clarity

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If more SCI fields are added for resource indication, then resource indication accuracy is improved, but SCI message length increases

Engineering Contradiction:

Core Design Contradiction:

Measurement precisionVSLength of moving object

Solution Approach 1:

The patent extracts the essential resource indication function from detailed resource specification fields. By using compact time-frequency resource indication information that leverages predefined relationships, the solution removes the need for extensive explicit resource description fields while maintaining accurate resource indication capability

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of directly indicating resource locations through explicit fields, the patent inverts the approach by using indication information combined with predefined relationships to derive resource locations. This indirect indication method achieves the same accuracy with significantly reduced message length

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS12446004B2Method for determining sidelink resource and terminal

Publication Date: 2025.10.14

AI summary

Embodiments of the present disclosure provide methods and terminals for determining a sidelink resource. An exemplary method includes determining, according to at least one of a frequency domain resource of SCI and frequency domain resource indication information carried by the SCI, a frequency domain resource of a target resource indicated by the SCI. The method also includes determining, according to at least one of a time domain resource of the SCI and time domain resource indication information carried by the SCI, a time domain resource of a target resource indicated by the SCI.