Dynamic DMRS Positioning for 5G Throughput and BLER Control
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Solution Overview
Problem
Existing 5G cellular communication systems face inefficiencies in data throughput and resource wastage due to static DMRS configurations, which are not dynamically adjusted based on channel conditions, leading to issues like high BLER, frequent UE release, and resource block wastage.
Innovation Solution
Implementing dynamic additional DMRS configuration through MAC-CE messages to adjust DMRS positions based on channel quality indicators (CQI and BLER) to optimize data throughput and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If static DMRS configurations are used, then device complexity is reduced, but data throughput deteriorates and resource wastage increases
Solution Approach 1:
The patent implements dynamic DMRS configuration where the number of DMRS positions is adjusted based on channel conditions. The MAC-CE message enables real-time modification of DMRS configuration from static to dynamic, allowing the system to adapt DMRS positions according to channel quality indicators (CQI) and block error rates (BLER), thereby resolving the contradiction between maintaining simple configuration and achieving high throughput.
Solution Approach 2:
The patent changes the parameter of DMRS position count dynamically. By modifying the number of DMRS positions based on channel conditions (CQI thresholds and BLER values), the system optimizes data throughput without requiring complete reconfiguration of the communication protocol, thus improving productivity while controlling complexity through parameter adjustment.
2Productivity
If dynamic DMRS configuration is implemented, then data throughput is improved, but message processing overhead increases
Solution Approach 1:
The patent establishes predetermined CQI thresholds and BLER criteria before dynamic configuration begins. These pre-defined parameters allow the system to quickly determine whether to adjust DMRS positions without extensive real-time calculations, reducing message processing overhead while maintaining the ability to improve throughput through dynamic adaptation.
Solution Approach 2:
The patent implements a feedback mechanism where the system monitors CQI and BLER values, compares them against predetermined thresholds, and automatically adjusts DMRS configuration accordingly. This closed-loop feedback system enables efficient throughput optimization by only triggering configuration changes when channel conditions warrant them, minimizing unnecessary message processing overhead.
3Reliability
If additional DMRS positions are added, then reliability is improved, but resource block utilization deteriorates
Solution Approach 1:
The patent dynamically adjusts the number of DMRS positions based on channel conditions. When CQI falls below predetermined thresholds or BLER exceeds acceptable levels, additional DMRS positions are added to improve reliability. When conditions are good, the system reduces DMRS positions to minimize resource block wastage, thus resolving the contradiction between maintaining stable connections and efficient resource utilization.
Solution Approach 2:
The patent applies partial action by adding DMRS positions only when and where needed based on channel conditions. Rather than uniformly increasing DMRS across all resource blocks, the system selectively adds positions only in scenarios where reliability is compromised (low CQI, high BLER), thereby improving connection stability without causing excessive resource block wastage in good channel conditions.
Data Source
AI summary
A system can configure a first number of demodulation reference signal positions in radio resource control information as part of a connection setup with a user equipment that is configured to facilitate first broadband cellular communications. The system can, after attaching the user equipment, send, to the user equipment, a medium access control control element message indicative of modifying the first number of demodulation reference signal positions to a second number of demodulation reference signal positions. The system can conduct second broadband cellular communications with the user equipment according to the second number of demodulation reference signal 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 demodulation reference signal positions.