PTRS Allocation Coordination for Phase Tracking Precision
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Solution Overview
Problem
In next-generation communication systems, there is a need for efficient allocation of phase tracking reference signals (PTRS) to ensure smooth communication between adjacent base stations, particularly in scenarios where PTRS collisions with other reference signals occur, affecting phase tracking and data transmission.
Innovation Solution
The proposed solution involves a method where a base station allocates and transmits PTRS on specific resource elements (REs) while avoiding collisions by exchanging parameters for PTRS allocation with adjacent base stations, allowing for zero power (ZP)-PTRS/data puncturing and rate matching to match various PTRS patterns, and includes a terminal configured to receive and perform phase tracking using PTRS transmitted on different REs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PTRS is transmitted on multiple resource elements to improve phase tracking accuracy, then phase tracking precision is improved, but collision with other reference signals increases
Solution Approach 1:
The base station performs preliminary actions by exchanging PTRS allocation parameters with adjacent base stations before actual PTRS transmission. This allows the system to pre-identify and avoid resource element collisions, ensuring that PTRS can be transmitted on multiple REs for improved phase tracking without causing or suffering from collisions with other reference signals.
Solution Approach 2:
The system dynamically adjusts PTRS allocation by exchanging parameters such as PTRS periodicity, subcarrier spacing, and resource element positions with adjacent base stations. This dynamic coordination allows the PTRS transmission pattern to adapt to avoid collisions while maintaining sufficient density for accurate phase tracking.
2Reliability
If PTRS allocation is coordinated with adjacent base stations to avoid collisions, then signal reliability is improved, but system complexity increases
Solution Approach 1:
The system manages coordination complexity by focusing exchanges on specific PTRS allocation parameters (periodicity, subcarrier spacing, resource element positions, port indices) rather than complete signal configurations. This parameter-based coordination approach maintains communication reliability through collision avoidance while limiting system complexity to essential allocation details.
3Reliability
If PTRS is punctured or rate-matched to avoid collisions, then orthogonality with data signals is maintained, but phase tracking performance degrades
Solution Approach 1:
By performing preliminary coordination with adjacent base stations to determine collision-free PTRS resource elements, the system eliminates the need for puncturing or rate-matching operations. This ensures that PTRS signals are transmitted on dedicated REs without being removed or adjusted, maintaining both signal orthogonality and optimal phase tracking performance.
4Measurement precision
If PTRS transmission density is increased to improve phase tracking in high mobility scenarios, then phase tracking accuracy is improved, but resource element collision probability increases
Solution Approach 1:
The base station performs preliminary coordination with adjacent base stations to identify suitable resource elements for high-density PTRS transmission before actual transmission. This allows the system to increase PTRS density in time-frequency resources while pre-avoiding collisions with other reference signals, maintaining both high phase tracking accuracy and low collision probability.
Solution Approach 2:
The system dynamically adjusts PTRS allocation density by exchanging parameters with adjacent base stations, allowing higher density in regions or time periods where collision risk is lower. This dynamic coordination enables the system to optimize phase tracking accuracy for high mobility scenarios while managing collision probability through adaptive resource allocation.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services.The present disclosure discloses a method and an apparatus for allocating a PTRS in a next-generation communication system.