Dynamic DMRS Configuration for 5G Throughput and Block Error Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing 5G cellular communication systems face inefficiencies in data throughput and resource wastage due to static DMRS configurations, leading to issues like high block error rates, frequent UE releases, and poor channel conditions, especially in scenarios such as high-speed mobility and cell edge locations.
Innovation Solution
Implementing dynamic additional DMRS configuration through a new field in DCI formats and UE capability IEs to adapt DMRS positions based on channel quality and feedback, allowing real-time adjustments to improve throughput and reduce resource wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static DMRS configuration is used, then device complexity is reduced, but reliability deteriorates due to poor channel conditions and high block error rates
Solution Approach 1:
The patent implements dynamic DMRS configuration where the base station can adjust the number of additional DMRS symbols based on channel conditions. The DCI format includes a field that dynamically indicates the additional DMRS symbol configuration, allowing the system to adapt DMRS density to current channel quality rather than using a fixed static configuration. This resolves the contradiction by making the system dynamic rather than static.
Solution Approach 2:
The patent changes the parameter of DMRS symbol positions and quantity based on channel quality indicators and block error rates. When channel conditions deteriorate or block error rates increase, the system increases the number of additional DMRS symbols to improve channel estimation accuracy. This parameter adjustment resolves the contradiction between reliability and complexity by only increasing complexity when necessary for reliability.
2Reliability
If additional DMRS symbols are added to improve channel estimation, then reliability improves, but productivity deteriorates due to resource wastage
Solution Approach 1:
The system dynamically adjusts the number of additional DMRS symbols based on actual channel conditions rather than using a fixed configuration. When channel conditions are good, fewer additional DMRS symbols are used, preserving resources for data transmission. When channel conditions are poor, more additional DMRS symbols are allocated to improve channel estimation. This dynamic adjustment resolves the contradiction between reliability and productivity.
Solution Approach 2:
The patent changes the DMRS configuration parameters (number of additional symbols, their positions) based on channel quality metrics. The base station monitors channel conditions and adjusts the additional DMRS configuration accordingly, increasing DMRS density only when channel estimation accuracy becomes critical for maintaining reliable communication. This resolves the contradiction by making resource allocation adaptive rather than static.
3Adaptability or versatility
If dynamic DMRS adjustment is implemented, then adaptability improves for varying channel conditions, but device complexity increases due to new DCI fields and capability IEs
Solution Approach 1:
The patent segments the DMRS configuration into two parts: a base configuration and an additional dynamic configuration. The base DMRS symbols are configured according to standard procedures, while additional DMRS symbols are configured dynamically through a specific field in the DCI format. This segmentation allows the system to maintain standard operation for normal cases while enabling dynamic adaptation only when needed, reducing the impact on protocol complexity.
Solution Approach 2:
The patent uses existing DCI format structures and extends them with additional fields for DMRS configuration rather than creating entirely new signaling mechanisms. The same DCI format that schedules data transmission also carries the additional DMRS configuration information, making the signaling mechanism multi-functional. This approach reduces protocol complexity by reusing existing structures rather than adding separate dedicated signaling channels.
4Reliability
If more additional DMRS symbols are configured, then reliability improves, but loss of time increases due to reduced transport block size
Solution Approach 1:
The system dynamically adjusts the number of additional DMRS symbols based on real-time channel conditions rather than using a fixed high configuration. When channel conditions are good, fewer additional DMRS symbols are used, maximizing transport block size and throughput. When channel conditions deteriorate or connection stability becomes problematic, the system increases additional DMRS symbols to maintain reliable communication. This dynamic adjustment resolves the contradiction between reliability and time loss.
Solution Approach 2:
The patent changes the additional DMRS configuration parameters based on channel quality indicators and connection stability metrics. The base station monitors channel conditions and adjusts the additional DMRS symbol count accordingly, increasing it only when necessary to maintain connection stability. This parameter adjustment resolves the contradiction by making the system responsive to actual conditions rather than always prioritizing reliability at the cost of throughput.
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 base station that is configured to facilitate first broadband cellular communications. The system can, after attaching to the base station, receive a message from the base station 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 base station 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.