DMRS Resource Configuration for LTE-Advanced Uplink Orthogonality
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current DMRS resource configuration methods in LTE-Advanced systems are complex and increase interference between codewords, as they involve independent combinational configuration items for CS and OCC sequences corresponding to different rank values, complicating standardization and system implementation.
Innovation Solution
The method simplifies DMRS resource configuration by presetting multiple combinational configuration items for CS and OCC sequences based on the maximum number of transmission layers supported, allowing for a subset configuration that ensures orthogonality and reduces interference, by using a subset of predefined configurations for generating DMRS sequences, and indicating these configurations through control signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If independent combinational configuration items for CS and OCC sequences are used for different rank values, then orthogonality between DMRS sequences can be achieved, but the complexity of standardization and system implementation increases
Solution Approach 1:
The patent combines CS and OCC sequence configurations into unified combinational configuration items. Instead of independently configuring CS and OCC sequences, the patent creates integrated configuration tables where each entry specifies both CS and OCC together, simplifying the standardization process while maintaining orthogonality requirements for different rank values
Solution Approach 2:
The patent creates universal combinational configuration tables that work across different rank values (Rank 1, 2, 3, 4). The same configuration table structure and methodology can be applied universally to support multiple transmission layers, reducing the need for separate independent configurations for each rank scenario
2Adaptability or versatility
If multiple combinational configuration items are preset for maximum transmission layers, then the system can support multiple transmission layers, but the complexity of describing the specification increases
Solution Approach 1:
The patent segments the configuration approach by creating separate configuration tables for different rank values (Rank 1, Rank 2, Rank 3, Rank 4). Each table contains combinational configuration items specific to that rank, making the specification more manageable and easier to describe while still supporting the maximum number of transmission layers through the combination of these segmented tables
Solution Approach 2:
The patent enables dynamic selection of appropriate combinational configuration items based on the actual number of transmission layers being used. The system can adaptively choose from the preset configuration items matching the current rank requirement, providing versatility for multiple transmission layers while keeping the specification description organized and manageable through this dynamic selection approach
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The embodiments of the present invention disclose resource configuration methods and relevant devices of a demodulation reference signal, wherein a resource configuration method of a demodulation reference signal may comprise: determining the number of transmission layers of the UE for transmitting uplink data; selecting combinational configurations of CS and OCC sequence necessary for generating DMRS sequences of respective transmission layers of the UE for transmitting uplink data, from one combinational configuration item of multiple combinational configuration items of CS and OCC sequence that are preset, directed to the maximum number of transmission layers supportable by the system, and usable for generating demodulation reference signal DMRS sequences of respective transmission layers, based on the determined number of transmission layers; generating and delivering to the UE a control signaling containing configuration indication information. The solutions of the embodiments of the present invention can simplify the complexity of a protocol describing the DMRS resource configurations, and is helpful for reducing inter-codeword DMRS interferences.