V2X Open-Loop Power Control Resource Segmentation

Solution Overview

Problem

In wireless communication systems supporting V2X, existing technologies face challenges in efficiently and precisely receiving V2X signals due to interference and power control issues, particularly in open-loop power control scenarios, which can degrade the reception performance of fixed nodes.

Innovation Solution

The method involves configuring an open-loop power control (OLPC) resource region periodically and determining the transmit power of V2X signals based on measured pathloss, allowing independent configuration of OLPC periodicity relative to V2X transmission periodicity, and ensuring the fixed node can overhear and relay signals effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If open-loop power control is applied to V2X signal transmission, then transmit power can be determined based on measured pathloss, but in-band emission interference increases and degrades fixed node reception performance

Engineering Contradiction:

Improvefixed node reception performanceVSAvoidin-band emission interference

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The resource region is divided into multiple sub-regions with different power control configurations. Specifically, the uplink resource region is segmented into first sub-regions (for V2V communication) and second sub-regions (for V2X communication with fixed nodes), allowing different power control parameters to be applied to different segments, thereby reducing overall interference while maintaining reliable reception

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different power control parameters are applied to different local regions within the resource pool. The first power control parameter set is applied to first sub-regions for V2V communication, while the second power control parameter set is applied to second sub-regions for V2X communication, optimizing performance locally for each communication type

Inventive Principle:

Principle #3Local quality

2Productivity

If V2X transmission periodicity is aligned with OLPC resource region periodicity, then power control can be efficiently applied, but flexibility in configuring independent periodicities is lost

Engineering Contradiction:

Improvepower control efficiencyVSAvoidperiodicity configuration flexibility

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The system dynamically adapts the OLPC resource region periodicity to match the V2X transmission periodicity through configuration parameters. The network can configure the periodicity of OLPC resource regions independently, and the UE adjusts its power control operations accordingly, allowing the system to be dynamic and adaptable to different transmission scenarios

Inventive Principle:

Principle #15Dynamics

3Reliability

If transmit power is increased to improve fixed node reception, then reception performance improves, but interference to V2V communication increases

Engineering Contradiction:

Improvefixed node signal receptionVSAvoidV2V communication quality degradation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The resource region is divided into multiple sub-regions with different power control configurations. Specifically, the uplink resource region is segmented into first sub-regions (for V2V communication) and second sub-regions (for V2X communication with fixed nodes), allowing different power control parameters to be applied to different segments, thereby reducing overall interference while maintaining reliable reception

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different power control parameters are applied to different local regions within the resource pool. The first power control parameter set is applied to first sub-regions for V2V communication, while the second power control parameter set is applied to second sub-regions for V2X communication, optimizing performance locally for each communication type

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS10244482B2Method for transmitting or receiving V2X signal in wireless communication system and device for performing same

Publication Date: 2019.03.26 LG ELECTRONICS INC

AI summary

A method by which a terminal transmits a signal in a wireless communication system supporting vehicle to everything (V2X), according to one embodiment of the present invention, comprises the steps of: measuring a path loss for a stationary node; and transmitting a V2X signal on the basis of a V2X transmission period or an event trigger, wherein, when the V2X signal is transmitted in a periodically set open loop power control (OLPC) resource region, transmission power of the V2X signal is determined on the basis of the measured path loss, and a period of the OLPC resource region can be set to be independent from the V2X transmission period.