NR V2X Sidelink MPR Configuration for Emission Mask Compliance

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

There is no established performance requirement for Maximum Output Power Reduction (MPR) for PSSCH/PSCCH applied to NR V2X terminals supporting power class 2, which is necessary for efficient sidelink communication.

Innovation Solution

Proposing specific MPR values for NR V2X sidelink terminals supporting power class 2, considering various subcarrier spacings and modulation orders, to ensure compliance with spectrum emission and spurious emission masks, thereby determining optimal transmission power for sidelink signals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If maximum output power is increased for NR V2X terminals, then transmission distance and coverage are improved, but compliance with spectrum emission masks and spurious emission masks deteriorates

Engineering Contradiction:

Improvemaximum output powerVSAvoidspectrum emission mask compliance

Core Design Contradiction:

PowerVSObject-affected harmful factors

Solution Approach 1:

The patent applies parameter changes by introducing MPR (Maximum Power Reduction) values that adjust the transmission power based on specific conditions such as subcarrier spacing and modulation order. This allows the system to dynamically change the power parameter to maintain emission mask compliance while maximizing transmission effectiveness within regulatory constraints.

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If transmission power is reduced to comply with emission masks, then spectrum emission compliance is improved, but transmission distance and communication effectiveness deteriorate

Engineering Contradiction:

Improvespectrum emission mask complianceVSAvoidtransmission distance

Core Design Contradiction:

Object-affected harmful factorsVSPower

Solution Approach 1:

The patent implements dynamics by making the MPR value adaptive rather than fixed. The MPR is dynamically adjusted based on operating conditions including subcarrier spacing (15 kHz, 30 kHz, 60 kHz) and modulation order (QPSK, 16QAM, 64QAM, 256QAM), allowing the system to optimize transmission distance while maintaining emission compliance for each specific scenario.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If MPR values are standardized for different subcarrier spacings and modulation orders, then system compatibility and standardization are improved, but device complexity increases

Engineering Contradiction:

Improvestandardization compatibilityVSAvoidMPR configuration complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies local quality by defining specific MPR values for different combinations of subcarrier spacing and modulation order rather than using a single uniform MPR value. This allows each operational mode to have optimized local parameters, improving standardization compatibility while keeping the complexity manageable through structured parameter tables.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12185406B2Maximum power reduction

Publication Date: 2024.12.31 LG ELECTRONICS INC

AI summary

One disclosure of the present disclosure provides a user equipment (UE). The UE comprises: a transceiver unit that transmits and receives a signal; and a processor that controls the transceiver unit, wherein the transceiver unit comprises two transmitters, the UE can perform output at a maximum of 26 dBm, the processor determines transmission power on the basis of maximum power reduction (MPR), the MPR is set based on outer RB allocations and inner RB allocations, the MPR is set based on CP-OFDM, the MPR is set based on QPSK, 16 QAM, 64 QAM, and 256 QAM, and the transceiver transmits a sidelink signal to another UE on the basis of the transmission power.