Demodulation Reference Signal Configuration for Wireless Channels
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Solution Overview
Problem
Current wireless communication networks face challenges in efficiently configuring demodulation reference signals for physical downlink shared channels, particularly in distinguishing and managing configurations between physical downlink shared channels and control channels, which affects signal processing and channel estimation.
Innovation Solution
The proposed solution involves configuring demodulation reference signals with separate configurations for physical downlink shared channels and control channels, utilizing frequency and time domain configurations, periodicity, offset, and port mapping orders, which can be indicated by radio resource control signaling, to optimize signal presence and placement across subframes and symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate demodulation reference signal configurations are used for physical downlink shared channel and physical downlink control channel, then signal processing efficiency and channel estimation accuracy are improved, but device complexity and configuration overhead increase
Solution Approach 1:
The patent segments the demodulation reference signal configuration into separate configurations for the physical downlink shared channel and physical downlink control channel. This allows independent optimization of each channel's reference signal parameters, improving channel estimation accuracy for each specific channel type while managing complexity through structured separation.
Solution Approach 2:
The patent applies local quality by allowing different demodulation reference signal configurations (such as different periodicities, offsets, or resource element positions) for different channel types. Each channel receives a configuration optimized for its specific requirements, enhancing overall system performance through localized optimization.
2Reliability
If separate demodulation reference signal configurations are used for physical downlink shared channel and physical downlink control channel, then communication reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent implements universality by designing a configurable framework where demodulation reference signal parameters can be universally applied across different channel types through standardized configuration fields. This multi-functional approach allows the same configuration mechanism to serve both shared channel and control channel requirements, improving reliability while controlling signaling overhead through efficient parameter reuse.
3Productivity
If frequency and time domain configurations are applied to demodulation reference signals, then signal processing efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies dynamics by enabling flexible frequency and time domain configurations for demodulation reference signals, where parameters such as resource block allocation, subframe periodicity, and symbol positions can be dynamically adjusted based on traffic conditions and channel characteristics. This dynamic configuration improves signal processing efficiency while the structured parameter set keeps implementation complexity manageable.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for demodulation reference signal configuration. One apparatus (200) includes a receiver (212) configured to receive (502) a demodulation reference signal configuration for a physical downlink shared channel. The apparatus (200) also includes the receiver (212) configured to receive (504) a demodulation reference signal based on the demodulation reference signal configuration.