Sidelink Resource Coordination for Hidden Node and Half-Duplex Limits

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Solution Overview

Problem

The existing NR-V2X Mode 2 resource allocation mechanism in Release 16 faces issues such as half-duplex and hidden node problems, leading to inappropriate resource selection, uncertain coordination information overhead, and poor timeliness in resource allocation.

Innovation Solution

A resource selection method where a coordinated UE transmits sidelink resource coordination request information, receives sidelink resource coordination information from a coordinating UE, and selects resources based on this information, including specific indications to manage overhead and timeliness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the coordinating UE feeds back detailed resource selection information based on sensing results, then the resource selection accuracy is improved, but the coordination information overhead increases significantly

Engineering Contradiction:

Improveresource selection accuracyVSAvoidcoordination information overhead

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent extracts only the essential coordination information (resource availability indicator and timing information) from the complete sensing results, rather than transmitting all detailed measurement data. This selective extraction maintains resource selection accuracy while significantly reducing the coordination information overhead.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of the coordinating UE providing detailed resource recommendations, the patent inverts the approach by having the coordinated UE perform its own sensing and resource selection, with the coordinating UE only providing minimal constraints or availability indicators. This reduces information overhead while maintaining selection quality.

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If the coordination request information includes comprehensive parameters for resource selection, then the resource selection reliability is improved, but the container size and processing complexity increase

Engineering Contradiction:

Improveresource selection reliabilityVSAvoidcontainer size and processing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the resource selection process into independent stages: sensing phase, coordination information exchange phase, and resource selection phase. Each stage uses only the necessary parameters for that specific task, reducing overall container size and processing complexity while maintaining reliability through cumulative information gathering.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent performs preliminary sensing and resource evaluation before the coordination information exchange, so that when coordination information is transmitted, only critical confirmation or constraint data is needed rather than complete resource assessment data. This reduces container size while maintaining selection reliability.

Inventive Principle:

Principle #10Preliminary action

3Loss of time

If the coordination information is transmitted with detailed sensing results, then the timeliness of resource confirmation is improved, but the transmission overhead and processing time increase

Engineering Contradiction:

Improvetimeliness of resource confirmationVSAvoidtransmission overhead

Core Design Contradiction:

Loss of timeVSQuantity of substance

Solution Approach 1:

The patent extracts only the most time-critical coordination information (resource availability status and timing constraints) for immediate transmission, while less time-sensitive detailed sensing results are either omitted or transmitted asynchronously. This maintains timeliness of resource confirmation while reducing transmission overhead.

Inventive Principle:

Principle #2Taking out (Extraction)

4Reliability

If the UE performs extensive sensing and resource evaluation before selection, then the resource selection appropriateness is improved, but the processing time and energy consumption increase

Engineering Contradiction:

Improveresource selection appropriatenessVSAvoidprocessing time

Core Design Contradiction:

ReliabilityVSDuration of action of moving object

Solution Approach 1:

The patent segments the sensing and evaluation process into multiple passes or stages, where initial quick evaluation identifies candidate resources, followed by more detailed evaluation only for the most promising candidates. This maintains resource selection appropriateness while reducing overall processing time through progressive refinement.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent performs partial sensing and evaluation on all potential resources, then focuses extensive evaluation only on a subset of promising candidates identified by the partial assessment. This maintains resource selection appropriateness for the final choice while reducing total processing time by avoiding exhaustive evaluation of all resources.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS12610380B2Resource selection method, resource selection device and terminal device

Publication Date: 2026.04.21 DATANG GOHIGH INTELLIGENT & CONNECTED TECH (CHONGQING) CO LTD

AI summary

A resource selection method, a resource selection device and a terminal device are provided, related to the field of communications technologies. The method includes: transmitting sidelink resource coordination request information; receiving sidelink resource coordination information from a coordinating UE; and performing a resource selection for the sidelink, according to the sidelink resource coordination information.