Adaptive DMRS Configuration for Accurate Channel Estimation
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Solution Overview
Problem
Existing reference signal configurations in wireless communication are not dynamically adaptable, leading to inaccurate channel estimation when channel quality is poor and wasteful resource usage when quality is good, due to fixed preconfiguration.
Innovation Solution
Adaptive demodulation reference signal (DMRS) configuration is implemented, where a terminal device receives dynamic configuration information from a network device, allowing it to adjust DMRS transmission based on channel conditions, thereby improving estimation accuracy and optimizing resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fixed preconfiguration of reference signals is used, then device complexity is reduced and ease of operation is improved, but channel estimation accuracy deteriorates when channel quality is poor
Solution Approach 1:
The patent applies dynamics by transitioning from fixed preconfiguration to dynamic adaptive configuration of reference signals. The network device determines DMRS configurations based on real-time channel conditions, allowing the system to adapt reference signal parameters (such as density, position, or type) according to varying channel quality, thereby improving channel estimation accuracy without requiring overly complex manual configuration mechanisms.
Solution Approach 2:
The patent implements parameter changes by modifying reference signal configuration parameters dynamically. The network device adjusts parameters such as DMRS type, additional DMRS positions, and mapping patterns based on channel quality indicators, enabling the system to optimize channel estimation performance under different channel conditions while maintaining manageable configuration complexity through automated parameter adjustment.
2Productivity
If fixed preconfiguration of reference signals is used, then configuration simplicity is maintained, but resource utilization deteriorates when channel quality is good
Solution Approach 1:
The patent applies dynamics by enabling the network device to adjust reference signal configurations dynamically based on channel quality. When channel quality is good, the system can reduce reference signal density or use more efficient configurations, thereby improving resource utilization. This dynamic adaptation is achieved through automated network-side control rather than complex manual reconfiguration, maintaining operational simplicity while enhancing efficiency.
Solution Approach 2:
The patent implements parameter changes by allowing the network device to modify reference signal parameters such as DMRS density, position, and type according to channel conditions. When channel quality is good, parameters are adjusted to reduce resource consumption while maintaining adequate estimation accuracy, thereby improving overall resource utilization efficiency without requiring complex user-side configuration changes.
3Measurement precision
If adaptive DMRS configuration is implemented, then channel estimation accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by implementing adaptive DMRS configuration only when necessary based on channel conditions. The network device selectively adjusts DMRS parameters rather than continuously reconfiguring, and only applies adaptive configurations when channel quality warrants improved estimation accuracy. This selective approach reduces unnecessary signaling overhead while maintaining the benefits of adaptivity when needed.
Solution Approach 2:
The patent implements feedback mechanisms where the network device monitors channel quality indicators and uses this feedback to determine appropriate DMRS configurations. The adaptive configuration decisions are based on feedback from channel state information, allowing the system to optimize channel estimation accuracy only when channel conditions require it, thereby minimizing unnecessary signaling overhead associated with constant reconfiguration.
4Productivity
If adaptive DMRS configuration is implemented, then resource utilization is optimized, but processing complexity increases
Solution Approach 1:
The patent applies self-service by enabling the network device to autonomously determine and configure adaptive DMRS parameters based on channel conditions. The network side performs the processing and decision-making for adaptive configuration without requiring complex user equipment involvement or manual intervention. This self-service approach at the network side optimizes resource utilization while keeping user device complexity manageable.
Solution Approach 2:
The patent implements feedback loops where the network device monitors channel quality and automatically adjusts DMRS configurations accordingly. This feedback-driven automated processing optimizes resource utilization by adapting reference signal parameters to actual channel conditions, while the processing complexity is centralized at the network device rather than distributed to user equipment, maintaining reasonable complexity levels.
Data Source
AI summary
Embodiments of the present disclosure relate to methods, devices and computer readable media for communication. According to embodiments of the present disclosure, a terminal device receives configuration information from a network device. The configuration information at least indicates a set of configurations for transmitting a demodulation reference signal (DMRS). The terminal device receives downlink information from the network device which indicates an adaptive DMRS configuration. The terminal device transmits the DMRS to the network device based on the adaptive DMRS configuration. In this way, the configuration of reference signals can be changed dynamically.