Sidelink Resource Reservation via SCI in V2X Communication

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Solution Overview

Problem

Existing communication systems face challenges in efficiently reserving and managing sidelink resources for V2X communications, leading to potential communication disruptions when resources are busy.

Innovation Solution

A method for reserving sidelink resources involves generating and transmitting sidelink control information (SCI) to indicate resource allocation for physical sidelink shared channels (PSSCH), allowing terminals to perform communication using reserved resources and release them when not in use.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a terminal performs sensing operation on sidelink resources, then the terminal can determine resource status (idle or busy), but the terminal cannot communicate when resources are determined to be busy

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidcommunication efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The transmitting terminal performs sensing operations in advance to identify idle sidelink resources before actual data transmission. Based on the sensing results, the terminal reserves resources for future transmissions, ensuring that when data needs to be sent, pre-validated idle resources are available, thus avoiding communication failures due to busy resources.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If sidelink resources are reserved for future transmissions, then resource availability is ensured, but resource management complexity increases

Engineering Contradiction:

Improveresource availabilityVSAvoidresource management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The transmitting terminal monitors the status of reserved sidelink resources through continuous sensing operations. When a reserved resource transitions from idle to busy state, the terminal receives feedback from the sensing operation and adjusts its resource reservation strategy accordingly, releasing or reselecting resources to maintain efficient utilization while ensuring availability when needed.

Inventive Principle:

Principle #23Feedback

3Reliability

If resource allocation information is included in SCI for future slots, then resource reservation is achieved, but control information size increases

Engineering Contradiction:

Improveresource reservationVSAvoidcontrol information overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent extracts and separates the resource allocation information for future transmissions from the current SCI message. Instead of including complete resource allocation details in every SCI, the terminal reserves resources and indicates only essential reservation information in current SCI, with full resource allocation details to be provided later when actual transmission occurs, thereby reducing current control information overhead.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20250125911A1Method and device for reservation of sidelink resource in communication system

Publication Date: 2025.04.17 HYUNDAI MOTOR CO LTD

AI summary

A method and a device for reservation of a sidelink resource in a communication system are disclosed. An operation method of a transmission terminal comprises the steps of: generating an SCI #n including resource allocation information about a PSSCH #n and resource allocation information about a PSSCH #n+k; transmitting the SCI #n to a reception terminal in the PSCCH #n; transmitting data #n to the reception terminal in the PSSCH #n indicated by the SCI #n; and receiving, from the reception terminal, a HARQ response to the data #n.