PTRS Configuration Adaptation for Resource Allocation Types
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Solution Overview
Problem
The existing Phase Tracking Reference Signal (PTRS) configuration in the New Radio (NR) system is associated only with scheduled Modulation and Coding Scheme (MCS)/Band Width (BW), which fails to meet requirements for different scenarios, particularly in resource allocation types such as LTE UL RA Type 0 and Type 2, leading to inadequate PTRS frequency density and presence.
Innovation Solution
The method determines different PTRS configuration parameters based on resource allocation types, using association tables and resource mappings specific to each type, such as RA Type 0 and Type 2, to provide a more suitable PTRS configuration for various resource allocation cases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If PTRS frequency density is associated only with scheduled MCS/BW, then the configuration is simple, but it cannot meet requirements for different resource allocation scenarios
Solution Approach 1:
The patent segments the PTRS configuration into different association tables corresponding to different resource allocation types (RA Type 0, RA Type 2, etc.). Each table provides specific PTRS frequency density settings optimized for its allocation type, allowing the system to adapt to different scenarios by selecting the appropriate table based on the resource allocation type indicated in DCI.
Solution Approach 2:
The patent introduces dynamic selection of PTRS configuration parameters based on the resource allocation type indicated in downlink control information. The system dynamically switches between different association tables (e.g., Table 1 for RA Type 0, Table 2 for RA Type 2) depending on the actual resource allocation type used, enabling adaptive PTRS density adjustment without requiring complex reconfiguration.
2Measurement precision
If a single PTRS association table is used for all resource allocation types, then the device complexity is low, but the measurement precision for different scenarios deteriorates
Solution Approach 1:
The patent applies local quality by providing different PTRS frequency density settings tailored to specific resource allocation types. Each association table (e.g., Table 1 for RA Type 0, Table 2 for RA Type 2) contains locally optimized parameters suitable for its specific allocation characteristics, rather than using a single uniform table for all scenarios.
Solution Approach 2:
The patent changes the PTRS frequency density parameter based on the resource allocation type. Different association tables define different density parameters (e.g., density values of 1/4, 1/8, 1/16 for different RA types and bandwidth parts), allowing the system to adjust this critical parameter to match the specific requirements of each resource allocation scenario for optimal phase noise tracking.
3Reliability
If PTRS density is increased for all scenarios, then phase noise compensation improves, but overhead and resource consumption increase
Solution Approach 1:
The patent applies partial action by providing PTRS density settings that are optimized for each specific resource allocation type rather than uniformly applying high density across all scenarios. The association tables define appropriate density levels (e.g., higher density for certain RA types with larger bandwidth parts, lower density for others) that provide sufficient phase noise compensation only where needed, avoiding excessive resource consumption in scenarios where lower density is adequate.
Data Source
AI summary
Embodiments of the present disclosure relate to methods, terminal device, network device and apparatuses for determining a Phase Tracking Reference Signal (PTRS) configuration parameter. In an embodiment of the present disclosure, the method of interference measurement comprises determining a PTRS transmission resource configuration parameter based on a resource allocation type to be used in data transmission. With embodiments of the present disclosure, it may determine different PTRS configuration parameters for different resource allocation types, and thus provide a more suitable PTRS configuration solution for different resource allocation cases.