Dynamic Additional DMRS Positions for 5G Throughput

Solution Overview

Problem

Existing 5G cellular communication systems face inefficiencies due to static DMRS configurations that lead to resource wastage, poor data throughput, and frequent UE release or RRC reestablishment procedures, particularly in scenarios with varying channel conditions, high-speed mobility, and UE location at cell edges.

Innovation Solution

Implementing dynamic additional DMRS configuration through new fields in DCI formats and UE capability IEs to adapt DMRS positions based on channel quality and BLER, allowing real-time adjustments to improve throughput and resource utilization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If static DMRS configurations are used, then device complexity is reduced and ease of operation is improved, but resource wastage increases and data throughput deteriorates

Engineering Contradiction:

Improvedata throughputVSAvoidresource wastage

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The patent implements dynamic DMRS configuration where the number of additional DMRS positions is no longer fixed but can be adjusted in real-time based on channel conditions, UE mobility, and BLER requirements. The gNB determines the appropriate number of additional DMRS positions dynamically and signals this configuration to the UE through RRC reconfiguration or DCI, allowing the system to adapt to varying channel conditions and optimize both throughput and resource utilization.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of DMRS configuration from static to dynamic by introducing mechanisms to adjust the number of additional DMRS positions based on channel quality indicators, BLER thresholds, and UE mobility states. This parameter change enables the system to optimize performance metrics such as throughput and resource efficiency by adapting DMRS density to actual channel conditions rather than using a fixed configuration.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If static DMRS configurations are used, then configuration complexity is reduced, but connection stability deteriorates due to frequent UE release and RRC reestablishment

Engineering Contradiction:

Improveconnection stabilityVSAvoidconfiguration complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements dynamic DMRS configuration where the number of additional DMRS positions is no longer fixed but can be adjusted in real-time based on channel conditions, UE mobility, and BLER requirements. The gNB determines the appropriate number of additional DMRS positions dynamically and signals this configuration to the UE through RRC reconfiguration or DCI, allowing the system to adapt to varying channel conditions and optimize both throughput and resource utilization.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent incorporates feedback mechanisms where the gNB monitors channel conditions, BLER, and UE mobility status, then uses this feedback to dynamically adjust the number of additional DMRS positions. This closed-loop approach allows the system to respond to changing conditions and maintain connection stability by adapting DMRS configuration to actual channel quality and mobility requirements.

Inventive Principle:

Principle #23Feedback

3Productivity

If dynamic DMRS configuration is implemented, then data throughput is improved and resource utilization is optimized, but device complexity and signaling overhead increase

Engineering Contradiction:

Improvedata throughputVSAvoidconfiguration complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent implements dynamic DMRS configuration where the number of additional DMRS positions is no longer fixed but can be adjusted in real-time based on channel conditions, UE mobility, and BLER requirements. The gNB determines the appropriate number of additional DMRS positions dynamically and signals this configuration to the UE through RRC reconfiguration or DCI, allowing the system to adapt to varying channel conditions and optimize both throughput and resource utilization.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12438665B2Dynamic additional demodulation reference signal configuration

Publication Date: 2025.10.07 DELL PROD LP

AI summary

A system can facilitate first broadband cellular communications between a user equipment and core network equipment according to a first number of additional demodulation reference signal (DMRS) positions. The system can determine to modify the first number of additional DMRS positions. The system can, based on determining to modify the first number of additional DMRS positions, send, to the user equipment, physical downlink control channel downlink control information that indicates a second number of additional DMRS positions that are configured in the downlink control information. The system can facilitate second broadband cellular communications between the user equipment and the core network equipment according to the second number of additional DMRS positions, wherein a throughput of the second broadband cellular communications is determined as a function of a size of a transport block set based on the second number of additional DMRS positions.