DMRS Configuration Grouping for NR Indication Overhead Reduction
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Solution Overview
Problem
Current communication systems face challenges in efficiently indicating demodulation reference signals (DMRS) in New Radio (NR) systems, particularly due to increased orthogonal-port quantities and diverse scenarios, which leads to high overheads in downlink control information (DCI) based indication methods.
Innovation Solution
The proposed solution involves designing multiple groups of DMRS configuration information to match different scenarios in NR systems, allowing for the determination of appropriate DMRS configuration information based on the current DMRS transmission scheme. This includes generating DMRS indication information to indicate resource units not occupied by DMRS, enabling the receive end to correctly decode data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If DCI based indication method is used to indicate DMRS in NR systems, then the system can support diverse scenarios and increased orthogonal-port quantities, but the indication overheads increase significantly
Solution Approach 1:
The patent segments the DMRS indication process into two parts: (1) pre-configuring multiple groups of DMRS parameters through higher layer signaling, and (2) indicating only the selected group index through DCI. This segmentation reduces the amount of information that needs to be transmitted dynamically while maintaining support for diverse scenarios and multiple orthogonal ports.
Solution Approach 2:
The patent applies preliminary action by pre-configuring multiple groups of DMRS parameters (such as DMRS port indices, scrambling identities, and resource allocation patterns) through higher layer signaling before actual data transmission. This allows the system to prepare multiple DMRS configurations in advance, reducing the indication overhead during dynamic scheduling.
2Adaptability or versatility
If multiple groups of DMRS configuration information are designed, then the system can match different NR scenarios, but the device complexity increases
Solution Approach 1:
The patent segments DMRS configurations into multiple predefined groups, where each group contains a set of related DMRS parameters. This segmentation allows the system to manage complexity by organizing configurations into discrete, manageable units that can be selectively activated through simple indexing rather than individually configuring each parameter.
Solution Approach 2:
The patent creates multiple groups of DMRS configuration information that can universally apply to different NR scenarios (such as different bandwidths, antenna configurations, and transmission modes). Each group serves as a universal template that can be reused across multiple transmission instances, reducing the need for scenario-specific customization and simplifying device complexity.
Data Source
AI summary
This application discloses a DMRS indicating method, a DMRS receiving method, and an apparatus. The method includes: determining, by a transmit end from a plurality of groups of demodulation reference signal DMRS configuration information, DMRS configuration information corresponding to a current DMRS transmission scheme, and obtaining DMRS indication information based on the DMRS configuration information, where each group of DMRS configuration information includes a plurality of pieces of DMRS configuration information; and sending, by the transmit end, the DMRS indication information. The method and the apparatus provided in this application are implemented to match a plurality of scenarios in NR. This can satisfy a requirement for transmitting more layers of data, and can further reduce indication overheads.