Dynamic Power Scaling for DMRS and Data Tones in Wireless Uplink

Solution Overview

Problem

In wireless communications, especially in high frequency bands like the unlicensed 60 GHz band, the power limitations restrict the bandwidth available for demodulation reference signal (DMRS) and data transmission, leading to inefficient power expenditure and reduced coverage due to differences in transmission powers between DMRS and data symbols.

Innovation Solution

The user equipment (UE) determines and adjusts transmission powers for DMRS and data tones based on resource block configurations, allowing for different transmission power ratios and allocating DMRS and data tones to the same frequency indices to maintain equal bandwidth and power, thereby optimizing power usage and maintaining phase continuity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If DMRS and data are transmitted with different power levels to meet high frequency band requirements, then power allocation flexibility is improved, but phase continuity is disrupted and transmission efficiency deteriorates

Engineering Contradiction:

Improvepower allocation flexibilityVSAvoidphase continuity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent changes the power parameter from a fixed equal power level to a dynamic scaled power level. The DMRS power is scaled relative to the data power using a scaling factor (e.g., 0.5 or 0.75), allowing the system to adapt power allocation to meet high frequency band requirements while maintaining phase continuity through proper scaling relationships.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces dynamic power scaling where the DMRS transmission power is adjusted based on the data transmission power and a scaling factor. This dynamic adjustment allows the system to respond to varying channel conditions and frequency band requirements while preserving the phase relationship between DMRS and data through controlled power scaling.

Inventive Principle:

Principle #15Dynamics

2Power

If DMRS bandwidth is reduced to accommodate power limitations in high frequency bands, then power compliance is improved, but data throughput and coverage are reduced

Engineering Contradiction:

Improvetransmission power complianceVSAvoiddata throughput

Core Design Contradiction:

PowerVSProductivity

Solution Approach 1:

The patent changes the power parameter from a fixed equal power level to a dynamic scaled power level. The DMRS power is scaled relative to the data power using a scaling factor (e.g., 0.5 or 0.75), allowing the system to adapt power allocation to meet high frequency band requirements while maintaining phase continuity through proper scaling relationships.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces dynamic power scaling where the DMRS transmission power is adjusted based on the data transmission power and a scaling factor. This dynamic adjustment allows the system to respond to varying channel conditions and frequency band requirements while preserving the phase relationship between DMRS and data through controlled power scaling.

Inventive Principle:

Principle #15Dynamics

3Reliability

If data power is reduced to match DMRS power level, then phase continuity is maintained, but transmission efficiency and coverage are reduced

Engineering Contradiction:

Improvephase continuityVSAvoidtransmission efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent changes the power parameter from a fixed equal power level to a dynamic scaled power level. The DMRS power is scaled relative to the data power using a scaling factor (e.g., 0.5 or 0.75), allowing the system to adapt power allocation to meet high frequency band requirements while maintaining phase continuity through proper scaling relationships.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces dynamic power scaling where the DMRS transmission power is adjusted based on the data transmission power and a scaling factor. This dynamic adjustment allows the system to respond to varying channel conditions and frequency band requirements while preserving the phase relationship between DMRS and data through controlled power scaling.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS11653309B2Power scaling for demodulation reference signal and data transmission

Publication Date: 2023.05.16 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive control signaling which indicates a resource block indicating a number of reference signal tones and data tones in an uplink transmission. In some cases, the UE may determine a first transmission power for the reference signal tones, and a second transmission power for the data tones that is different from the first transmission power. In some other cases, the UE may identify a frequency allocation for the resource block which allocates a same frequency bandwidth for the reference signal tones and the data tones, and the UE may determine a same transmission power for the reference signal tones and the data tones based on the frequency allocation. Based on the determination of transmission powers, the UE may transmit the reference signal tones and the data tones to a base station.