PUSCH Repetition Beam Mapping for Multi-TRP Latency
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Solution Overview
Problem
Current 5G NR networks lack a method for implementing PUSCH repetition transmission in multi-transmission/reception points (TRP) and multi-panel scenarios, particularly for PUSCH Repetition Type B, which does not consider beam switching latency aspects.
Innovation Solution
A method and apparatus that obtain and utilize multiple beam mapping patterns associated with time domain resource assignments to efficiently map beams for PUSCH repetitions, selecting the appropriate pattern based on predefined criteria to minimize beam switching latency and optimize TRP interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If PUSCH repetition Type B is used to reduce latency, then transmission speed is improved, but beam switching latency is not considered and reliability deteriorates in multi-TRP scenarios
Solution Approach 1:
The patent applies dynamics by making the beam mapping pattern selectable and adaptable based on transmission conditions. The system dynamically chooses between different beam mapping patterns (sequential, cyclical, half-to-half) depending on the number of beams and TRP configurations, allowing the system to optimize between speed and reliability in real-time multi-TRP scenarios
Solution Approach 2:
The patent changes the parameter of beam mapping pattern selection based on transmission conditions. By configuring different mapping patterns (sequential for single beam, cyclical for multiple beams across TRPs, half-to-half for balanced distribution), the system adjusts the beam assignment parameters to account for beam switching latency while maintaining low-latency transmission
2Adaptability or versatility
If multiple beam mapping patterns are configured for different time domain resource assignments, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent segments the beam mapping configuration into multiple distinct patterns (sequential, cyclical, half-to-half), each optimized for specific scenarios. The network configures appropriate patterns based on time domain resource assignment types, allowing the system to adapt to different multi-TRP configurations without requiring a single complex universal solution
Solution Approach 2:
The patent applies preliminary action by pre-configuring multiple beam mapping patterns through network signaling before actual PUSCH transmission. The UE receives and stores these patterns in advance, so when transmission occurs, the appropriate pattern is already available for immediate application, reducing real-time decision complexity
Data Source
AI summary
An apparatus including: circuitry for obtaining a first configuration from a network element, the first configuration including multiple beam mapping patterns for mapping at least two beams to at least two Physical Uplink Shared Channel (PUSCH) repetitions, wherein the beam mapping patterns are associated with at least one time domain resource assignment option; circuitry for obtaining an indication of a time domain resource assignment for PUSCH repetition operation from the network element; circuitry for checking whether beam mapping patterns are associated with the indicated time domain resource assignment; circuitry responsive to only one beam mapping pattern associated with the indicated time domain resource assignment, for using said one beam mapping pattern for mapping at least two PUSCH repetitions; and circuitry responsive to multiple beam mapping patterns associated with the indicated time domain resource assignment, for selecting one beam mapping pattern according to predefined criteria.