DMRS-Based PTRS Port Mapping for High-Frequency Communications
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Solution Overview
Problem
The challenge in high-frequency wireless communication is determining the frequency domain position occupied by a phase tracking reference signal (PTRS) port, which is crucial for estimating phase noise but lacks a clear method in current technologies.
Innovation Solution
A method to determine the frequency domain position of a PTRS port by using the index of a DMRS port, offset index, and a preset correspondence, considering different DMRS types and capacity expansion manners, ensuring non-overlapping frequency domain positions to avoid interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the quantity of DMRS ports supported on a single symbol increases, then the communication capacity and data rate improve, but the phase noise estimation accuracy deteriorates due to increased frequency domain position determination complexity
Solution Approach 1:
The patent segments the frequency domain positions into distinct sets for different DMRS port configurations. By defining separate frequency domain position determination methods for Type 1 DMRS (ports 0-7) and Type 2 DMRS (ports 0-11), the system can accurately identify PTRS port positions even as the number of supported DMRS ports increases, thereby maintaining phase noise estimation accuracy while supporting higher communication capacity.
Solution Approach 2:
The patent introduces an intermediary mapping mechanism that relates DMRS port indices to PTRS port frequency domain positions through predefined correspondence tables and offset calculations. This intermediary mapping allows the system to determine PTRS port positions indirectly through DMRS port information, resolving the complexity of directly determining frequency domain positions for large numbers of DMRS ports.
2Ease of operation
If the frequency domain position determination method is simplified, then the ease of operation improves, but the reliability of phase noise estimation deteriorates
Solution Approach 1:
The patent performs preliminary action by pre-defining the correspondence relationships between DMRS port indices and PTRS port frequency domain positions in standardized tables and formulas. This preliminary configuration allows terminal devices to quickly and reliably determine frequency domain positions without complex real-time calculations, thereby improving ease of operation while maintaining estimation reliability through predefined accurate mappings.
Solution Approach 2:
The patent utilizes parameter changes by adjusting the frequency domain position offsets based on DMRS port indices and configuration parameters. Through systematic parameter variations in the mapping formulas (such as different offset values for different DMRS port ranges), the system achieves both simple determination procedures and reliable position identification, resolving the contradiction between ease of operation and reliability.
3Productivity
If DMRS ports are added to increase capacity, then the communication rate improves, but the device complexity increases due to additional frequency domain position management requirements
Solution Approach 1:
The patent applies universality by creating a unified frequency domain position determination framework that works for both Type 1 and Type 2 DMRS configurations. The same basic principle of mapping DMRS port indices to PTRS port positions through predefined correspondence and offset calculations applies to all DMRS port configurations, allowing the system to handle increased capacity scenarios without proportionally increasing device complexity.
Solution Approach 2:
The patent resolves the complexity issue by transitioning from a one-to-one mapping approach to a multi-dimensional mapping approach that considers both DMRS port index and configuration type (Type 1 or Type 2) as dimensions. This dimensional expansion allows the system to manage more DMRS ports by organizing the mapping relationships in a structured, multi-parameter framework rather than requiring separate handling for each port configuration.
Data Source
AI summary
Embodiments of this application provide a communication method and apparatus. A DMRS type is a type 1, and a quantity of DMRS ports in a DMRS port set is greater than 4, that is, a quantity of DMRS ports supported on a single symbol is greater than 4. Alternatively, a DMRS type is a type 2, and a quantity of DMRS ports in a DMRS port set is greater than 6, that is, a quantity of DMRS ports supported on a single symbol is greater than 6. In this way, the frequency domain position occupied by the PTRS port is determined when the quantity of DMRS ports supported on the single symbol increases.