Dynamic Spatial Filter Switching for Semi-Persistent Grant Coverage
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Solution Overview
Problem
Current wireless communication systems face challenges in effectively managing beams and enhancing coverage for semi-persistent and configured grant transmissions, particularly in 5G/NR mobile communications.
Innovation Solution
The proposed solution involves a method where a user equipment (UE) receives a configuration for spatial filters, determines different spatial filters and their corresponding numbers of repetitions, and transmits signals or channels using these filters for varying numbers of repetitions, with the second number of repetitions transmitted after the first.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single spatial filter is used for all transmissions, then device complexity is reduced, but beam management effectiveness deteriorates
Solution Approach 1:
The patent implements dynamic spatial filter selection where the UE switches between first and second spatial filters based on transmission conditions. The system determines different numbers of repetitions for each spatial filter and dynamically selects which filter to use for each transmission group, making the beam management adaptive rather than static.
Solution Approach 2:
The patent divides the transmission process into multiple groups, where each group can use a different spatial filter. The repetitions are segmented into first group repetitions using the first spatial filter and second group repetitions using the second spatial filter, allowing differentiated beam management for different transmission segments.
2Reliability
If multiple spatial filters with different repetition numbers are used, then coverage enhancement is improved, but device complexity increases
Solution Approach 1:
The patent changes key parameters including the number of repetitions and spatial filter selection based on transmission conditions. The system determines a first number of repetitions for the first spatial filter and a second number of repetitions for the second spatial filter, allowing parameter optimization for different beam configurations.
Solution Approach 2:
The patent applies different spatial filters to different transmission groups based on local conditions. Each spatial filter is optimized for specific transmission scenarios, with the first spatial filter used for certain groups and the second spatial filter used for other groups, providing localized optimization rather than uniform configuration.
3Measurement precision
If repetitions are transmitted with varying spatial filters, then signal quality is improved, but processing complexity increases
Solution Approach 1:
The UE autonomously determines the spatial filters and number of repetitions based on configured parameters and transmission conditions. The system performs self-service by selecting appropriate spatial filters and repetition counts without requiring continuous network control, reducing real-time processing complexity while maintaining signal quality.
Data Source
AI summary
Apparatuses and methods for transmitting or receiving a signal or a channel. A method for operating a user equipment (UE) to receive the signal or the channel includes receiving a configuration for spatial filters, determining first and second spatial filters from the spatial filters, and determining first and second numbers of repetitions. The spatial filters correspond to spatial relations with reference signals (RSs), respectively. The first and second spatial filters are different. The first and second numbers of repetitions are different. The method further includes transmitting the signal or the channel using the first spatial filter for the first number of repetitions and using the second spatial filter for the second number of repetitions. The second number of repetitions is transmitted after the first number of repetitions.