Sidelink Power Control Using Distance Assistant Information

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Solution Overview

Problem

In the P2V scenario, the existing power control methods for sidelink communication in V2X communication systems fail to accurately determine appropriate transmission power for P2V information due to unknown distances between the transmitter and receiver ends, leading to inefficient information transmission.

Innovation Solution

A power control method and apparatus that acquire and utilize transmission power assistant information to determine or adjust the transmission power for sidelink information, allowing the terminal or base station to set appropriate power levels based on learned distances between the receiver and transmitter ends using positioning systems or maps.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the transmitter end uses a fixed transmission power configuration from base station, then the power control is simple to implement, but the transmission power is not appropriate for different receiver distances leading to inefficient information transmission

Engineering Contradiction:

Improvepower control implementation simplicityVSAvoidinformation transmission efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The patent introduces feedback mechanisms where receiver ends send power feedback information to transmitter ends, enabling dynamic adjustment of transmission power based on actual channel conditions and distance, thus resolving the contradiction between simple implementation and transmission efficiency

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent implements preliminary power configuration where base stations pre-configure multiple power parameters before sidelink communication begins, allowing transmitter ends to select appropriate power levels based on measured distances or received signal strengths, achieving both ease of operation and transmission efficiency

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If the transmitter end adjusts power based on unknown distance information, then the communication can adapt to different scenarios, but the distance information is unavailable making appropriate power configuration impossible

Engineering Contradiction:

Improvecommunication scenario adaptabilityVSAvoiddistance information availability

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent introduces intermediary mechanisms such as base stations that provide distance information or signal strength measurements to transmitter ends, or intermediary messages exchanged between transmitter and receiver that convey distance-related information, thus enabling power adaptation without direct distance measurement capability

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces direct distance measurement (mechanical/geometric approach) with signal-based inference methods, where transmitter ends determine appropriate power levels by measuring received signal strengths or using base station-provided path loss information, achieving scenario adaptability without physical distance data

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If higher transmission power is used to ensure coverage for distant receivers, then communication reliability improves, but energy consumption increases and near receivers experience interference

Engineering Contradiction:

Improvecommunication coverage reliabilityVSAvoidtransmission energy consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent applies local quality principles by enabling transmitter ends to adjust transmission power locally based on specific receiver conditions and distances, so that distant receivers receive sufficient power while near receivers are not subjected to excessive interference, optimizing both reliability and energy efficiency

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements dynamic power adjustment where transmission power is not fixed but continuously adapted based on real-time channel conditions, receiver distances, and traffic requirements, allowing the system to maintain reliability while minimizing energy consumption by using only the necessary power level

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS11330532B2Power control method and apparatus and communication system

Publication Date: 2022.05.10 1FINITY INC

AI summary

A power control method and apparatus and a communication system. The method includes: a terminal acquires transmission power assistant information when transmission of sidelink information is triggered; and the terminal determines transmission power of the sidelink information according to the transmission power assistant information. With the embodiments of this disclosure, by using a characteristic that an application stratum of the terminal is able to learn a distance between a receiver end and a transmitter end according to a positioning system and/or a map, information related on power setting is provided to an access stratum of the terminal, so as to instruct the terminal or an eNB to set appropriate transmission power.