PDSCH Rate Matching Around CRS Patterns in NC-JT Spectrum Sharing
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Solution Overview
Problem
Existing wireless communication technologies face challenges in efficiently managing rate matching and dynamic spectrum sharing in Non-coherent Joint-Transmission (NC-JT) scenarios, particularly when multiple transmission points or panels are involved, leading to inefficiencies in data transmission and interference management.
Innovation Solution
Implementing a method for rate matching that considers cell-specific reference signal (CRS) patterns and transmission configuration indication (TCI) states to optimize PDSCH resource mapping and interference handling in NC-JT with dynamic spectrum sharing, allowing for coherent or non-coherent joint transmission across different radio access technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If rate matching is performed around CRS patterns in NC-JT scenarios, then interference management is improved, but device complexity increases due to multiple TCI states and CRS pattern configurations
Solution Approach 1:
The patent applies preliminary action by pre-configuring TCI states and CRS patterns before actual data transmission. The network node configures multiple TCI states with associated CRS patterns in advance, allowing the UE to prepare rate matching parameters beforehand. This reduces real-time processing complexity while maintaining effective interference management through pre-planned resource allocation around reference signals.
Solution Approach 2:
The patent segments the rate matching process by applying different CRS patterns to different sets of layers through distinct TCI states. Each TCI state is associated with specific CRS patterns, allowing independent configuration and management of rate matching parameters for different layer groups. This segmentation simplifies the overall complexity by breaking down the monolithic rate matching into manageable, independently configurable segments.
2Adaptability or versatility
If multiple TCI states are configured for different layer sets, then adaptability is improved, but manufacturing precision requirements increase for consistent rate matching performance
Solution Approach 1:
The patent applies local quality by assigning different CRS patterns and rate matching parameters to different sets of layers based on their specific requirements. Each TCI state can be optimized for its associated layers with locally appropriate rate matching configurations. This allows high adaptability across different layer sets while maintaining precision within each local configuration, as each segment can be independently optimized without affecting others.
3Productivity
If dynamic spectrum sharing is implemented between NR and LTE, then productivity is improved, but loss of information increases due to overlapping resource allocation
Solution Approach 1:
The patent uses TCI states as an intermediary mechanism to coordinate resource allocation between NR and LTE systems. The TCI states carry information about associated CRS patterns that act as mediators for rate matching decisions. This intermediary layer enables dynamic spectrum sharing by providing a structured way to indicate which resources are occupied by reference signals, preventing data transmission on overlapping resources and thus maintaining data integrity while improving overall spectrum utilization productivity.
Data Source
AI summary
A method and apparatus are disclosed for rate matching. In one embodiment, a user equipment is configured to receive at least two physical downlink shared channels, PDSCHs; a first PDSCH of the at least two PDSCHs being associated with a first set of cell-specific reference signal, CRS, patterns and a second PDSCH of the at least two PDSCHs being associated with a second set of CRS patterns; and the at least two PDSCHs being rate matched around at least one of the first set of CRS patterns and the second set of CRS patterns. In another embodiment, a network node is configured to transmit the at least one PDSCH of at the least two PDSCHs; and the at least two PDSCHs being rate matched around at least one of the first set of CRS patterns and the second set of CRS patterns.