DMRS Port Subset Bundling for Power and Phase Continuity
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Solution Overview
Problem
Existing channel estimation techniques in wireless communications systems are deficient, particularly in maintaining power consistency and phase continuity of demodulation reference signal (DMRS) bundles across multiple transmission occasions, which affects the accuracy of channel estimation.
Innovation Solution
A framework for selecting a subset of DMRS ports to bundle over multiple transmission occasions, ensuring power condition and phase continuity are maintained, allowing for improved channel estimation by user equipment (UE) or network entities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all DMRS ports are bundled across multiple transmission occasions, then channel estimation accuracy is improved, but power consistency and phase continuity conditions become difficult to maintain
Solution Approach 1:
The patent segments the full set of DMRS ports into a subset that satisfies power consistency and phase continuity conditions. By selecting only certain ports for bundling rather than including all ports, the system maintains the reliability conditions while still achieving improved channel estimation accuracy through the bundling of the selected subset.
Solution Approach 2:
The patent applies local quality by ensuring that the selected subset of DMRS ports has specific properties (power consistency and phase continuity) that are not required for all ports. This localized application of quality conditions allows bundling to be applied where beneficial while maintaining system-wide reliability.
2Reliability
If a subset of DMRS ports is selected for bundling, then power consistency and phase continuity are maintained, but the number of ports available for channel estimation is reduced
Solution Approach 1:
The patent changes the parameter of port selection by identifying and selecting a specific subset of DMRS ports that satisfy power consistency and phase continuity conditions. This parameter change optimizes the bundling process by ensuring that only ports meeting the reliability criteria are included, thereby maintaining power and phase stability while still achieving effective channel estimation.
3Reliability
If DMRS bundling is applied across all transmission occasions, then channel estimation robustness is improved, but system complexity increases
Solution Approach 1:
The patent extracts the essential elements for robust channel estimation by selecting a subset of DMRS ports that satisfy power consistency and phase continuity conditions. By taking out only the necessary ports rather than bundling all ports across all transmission occasions, the system achieves robust channel estimation while reducing the complexity of configuration and management.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a control message that indicates a set of demodulation reference signal (DMRS) ports for DMRS communication between the UE and a network entity. The UE may select a subset of DMRS ports from the set of DMRS ports for DMRS bundling across a set of transmission occasions. The subset of DMRS ports may have fewer DMRS ports than the set of DMRS ports. The UE may communicate a set of DMRSs with the network entity over the set of transmission occasions using the set of DMRS ports. A portion of the set of DMRSs may correspond to the subset of DMRS ports, may satisfy a power condition for DMRS bunding, and may satisfy a phase continuity condition for DMRS bundling.