V2X Resource Selection Preventing Half-Duplex Collisions

Solution Overview

Problem

In wireless communication systems, especially for Vehicle-to-Everything (V2X) applications, half-duplex communication modes lead to reduced data reception rates due to simultaneous data transmission by multiple terminal devices, which can't receive data during transmission, failing to meet high reliability requirements.

Innovation Solution

A communication device that selects a resource for data transmission without temporal overlap with nearby devices, using a processor to sense and exclude busy resources, ensuring data is transmitted on idle resources, thereby preventing simultaneous transmission and enhancing reception rates.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If terminal devices transmit data simultaneously in half-duplex mode, then transmission speed is improved, but data reception rate deteriorates due to inability to receive during transmission

Engineering Contradiction:

Improvetransmission speedVSAvoiddata reception rate

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The terminal device performs sensing and resource selection in advance before data transmission. By identifying and reserving idle resources beforehand, the device ensures that transmission occurs only when no other device is transmitting, thus maintaining high transmission speed while avoiding reception conflicts that would reduce data reception rate.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The terminal device continuously senses the wireless environment to detect whether other devices are transmitting. This feedback mechanism allows the device to adapt its transmission timing based on real-time channel conditions, ensuring that simultaneous transmissions are avoided while maintaining efficient use of available resources.

Inventive Principle:

Principle #23Feedback

2Loss of time

If terminal devices autonomously select resources without central control, then transmission delay is reduced, but resource allocation efficiency deteriorates due to potential conflicts

Engineering Contradiction:

Improvetransmission delayVSAvoidresource allocation efficiency

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

The terminal device performs sensing and resource selection in advance before data transmission. By identifying and reserving idle resources beforehand, the device ensures that transmission occurs only when no other device is transmitting, thus maintaining high transmission speed while avoiding reception conflicts that would reduce data reception rate.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Each terminal device autonomously performs sensing, resource selection, and transmission without requiring central coordination. This self-service approach enables immediate transmission when resources are available, minimizing transmission delay while the sensing mechanism prevents resource conflicts through decentralized intelligence.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS11968695B2Communication device, wireless communication system, and resource selecting method

Publication Date: 2024.04.23 1FINITY INC

AI summary

A communication device includes a processor that selects a first resource such that the first resource that is used to transmit data by the communication device does not overlap with a second resource that is used to transmit data by another communication device located in vicinity of the communication device and a transmitter that transmits the data by using the first resource selected by the processor.