V2X Resource Selection via PSCCH Monitoring

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Solution Overview

Problem

In wireless communication systems, vehicle-to-everything (V2X) operations face interference due to overlapping resource selection by different wireless devices, making reliable V2X communication difficult.

Innovation Solution

A method where a wireless device monitors a physical sidelink control channel (PSCCH) for another UE and transmits a V2X message using a resource that does not overlap with the scheduled resource by the PSCCH, selecting from idle resource units to avoid interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If wireless devices arbitrarily select resources from the same resource pool for V2X communication, then resource utilization is improved, but interference occurs due to overlapping resource selection

Engineering Contradiction:

Improveresource utilizationVSAvoidinterference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The wireless device performs sensing in advance by monitoring PSCCH transmissions from other UEs before selecting resources for its own V2X messages. This preliminary detection of occupied resources allows the device to choose non-overlapping resources, thereby avoiding interference while maintaining efficient resource utilization from the pool

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The device uses feedback from monitoring the physical sidelink control channel (PSCCH) to adapt its resource selection. By detecting PSCCH transmissions from other UEs and identifying their scheduled resources, the device adjusts its resource choice to avoid overlap, creating a feedback-driven resource allocation mechanism that reduces interference

Inventive Principle:

Principle #23Feedback

2Object-affected harmful factors

If wireless devices monitor PSCCH for other UEs and avoid overlapping resources, then interference is reduced, but resource selection complexity increases

Engineering Contradiction:

ImproveinterferenceVSAvoidresource selection complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The wireless device autonomously performs sensing and resource selection without requiring complex centralized coordination or sophisticated algorithms. Each device independently monitors PSCCH, identifies occupied resources, and selects its own non-overlapping resources from the pool, simplifying the overall system while reducing interference

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS11832239B2Resource selection method for V2X operation of terminal in wireless communication system, and terminal using method

Publication Date: 2023.11.28 LG ELECTRONICS INC

AI summary

Provided are a resource selection method for a vehicle-to-everything (V2X) operation of a terminal in a wireless communication system, and a terminal using the method. The method comprises: monitoring physical sidelink control channels (PSCCHs) for other terminals in a first subframe; and transmitting, in a second subframe, a V2X message by using a resource which is not overlapped with a resource scheduled by the PSCCH for another terminal.