PTRS-DMRS Port Association for Phase Noise Compensation
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Solution Overview
Problem
Current 5G communication systems face challenges in managing phase noise, particularly in high-frequency bands like mmW, which affects signal recovery and requires efficient phase tracking reference signals to compensate for oscillator instability and inter-carrier interference.
Innovation Solution
The method involves generating and transmitting association information between Phase Tracking Reference Signal (PTRS) ports and Demodulation Reference Signal (DMRS) ports to estimate and compensate for phase noise, using quasi-co-location signaling and periodic indication to define relationships between these ports in multi-transmission and reception point environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phase tracking reference signals are used to compensate for phase noise in high-frequency bands, then signal recovery capability is improved, but system complexity and resource overhead increase
Solution Approach 1:
The patent makes PTRS ports shareable across multiple DMRS ports, allowing a single PTRS port to serve multiple demodulation functions. This multi-functionality reduces the total number of PTRS ports needed, thereby降低ing system complexity and resource overhead while maintaining phase noise compensation capability across all DMRS ports
Solution Approach 2:
The patent combines multiple DMRS ports with a single PTRS port through association information, merging the phase tracking function across multiple ports. This consolidation reduces resource overhead and system complexity while preserving signal recovery capability through shared phase noise estimation
2Measurement precision
If multiple PTRS ports are allocated for each DMRS port in multi-TRP environments, then phase noise tracking accuracy is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent introduces dynamic association information that can be configured based on channel conditions and TRP scenarios. The system dynamically determines the optimal mapping between PTRS and DMRS ports, allowing phase noise tracking accuracy to be maintained while adapting resource allocation to actual needs, thereby improving resource utilization efficiency
Solution Approach 2:
The patent changes the parameter of PTRS-DMRS port association from fixed one-to-one mapping to flexible many-to-one or many-to-many mapping. This parameter change allows the system to optimize the balance between phase noise tracking accuracy and resource utilization by adjusting association configurations based on environmental conditions
3Measurement precision
If association information between PTRS ports and DMRS ports is explicitly signaled, then phase noise compensation accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent applies partial signaling by providing association information only when necessary (e.g., in multi-TRP environments or specific channel conditions) rather than always signaling explicitly. This partial action maintains phase noise compensation accuracy where needed while reducing unnecessary signaling overhead in scenarios where default assumptions suffice
Solution Approach 2:
The patent uses implicit copying of association patterns from known configurations or previous transmissions. Instead of always explicitly signaling complete association information, the system copies or reuses association patterns that can be inferred from existing context, reducing signaling overhead while maintaining compensation accuracy
Data Source
AI summary
The present disclosure relates to a communication scheme and system for converging a 5th generation (5G) communication system for supporting a data rate higher than that of a 4th generation (4G) system with an internet of things (IoT) technology. The present disclosure is applicable to intelligent services (e.g., smart homes, smart buildings, smart cities, smart cars, connected cars, health care, digital education, retails, and security and safety-related services) based on the 5G communication technology and the IoT-related technology. The present disclosure relates to a radio network technology for use in a beamforming-based cellular system. A method for compensating phase noise by a user equipment (UE) is provided. The method comprises receiving, from a base station, association information between at least one phase tracking reference signal (PTRS) port and at least one demodulation reference signal (DMRS) port, identifying phase noise between the UE and the base station based on the association information, and compensating for the phase noise based on the result of the identification.