Sidelink Availability Signaling for Collision Reduction

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Solution Overview

Problem

Current wireless communication technologies, such as LTE and NR, face challenges in efficiently managing sidelink communication resources, particularly in determining availability for sidelink communication, leading to potential collisions and reduced performance in scenarios beyond V2X contexts.

Innovation Solution

User equipment (UE) determines and transmits future available information (FAI) indicating time and frequency domain availability for sidelink communication, allowing for autonomous resource selection and scheduling, thereby reducing collisions and improving communication efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If autonomous resource selection is implemented for sidelink communication, then resource allocation flexibility is improved, but resource collision probability increases

Engineering Contradiction:

Improveresource allocation flexibilityVSAvoidresource collision probability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies preliminary action by having UEs indicate their future availability information in advance before actual sidelink communication occurs. This allows other UEs to know beforehand which time-frequency resources will be occupied, enabling them to select alternative resources and avoid collisions before they happen.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback mechanisms where UEs exchange availability information through signaling messages. This feedback loop allows UEs to adjust their resource selection based on received availability information from other UEs, reducing the probability of resource collisions while maintaining autonomous resource allocation flexibility.

Inventive Principle:

Principle #23Feedback

2Measurement precision

If availability indication signaling is transmitted frequently, then resource allocation accuracy is improved, but signaling overhead increases

Engineering Contradiction:

Improveresource allocation accuracyVSAvoidsignaling overhead

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The patent applies partial action by having UEs indicate only the essential future availability information that is most critical for resource allocation decisions. Rather than transmitting complete and continuous availability status, the system transmits sufficient information to enable accurate resource selection while minimizing signaling overhead.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The patent implements periodic action by having UEs transmit availability information at specific intervals or triggers rather than continuously. This periodic transmission approach maintains resource allocation accuracy by providing regular updates while significantly reducing the overall signaling overhead compared to continuous transmission.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS11647486B2Indicating availability for sidelink communication

Publication Date: 2023.05.09 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine that an availability condition is satisfied, wherein the availability condition relates to an availability of the UE for sidelink communication; identify future available information (FAI) that indicates at least one of a time domain availability of the UE for sidelink communication or a frequency domain availability of the UE for sidelink communication; and transmit the FAI based at least in part on determining that the availability condition is satisfied. Numerous other aspects are provided.