Multi-PUSCH Spatial Relation Switching Across SBFD Symbols
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Solution Overview
Problem
In 5G communication systems, the inconsistent antenna configurations between Subband-Fully-Duplex (SBFD) and non-SBFD symbols cause reception inaccuracies at the base station when UEs transmit multiple physical uplink shared channels (PUSCHs) across different symbol types, and some UEs lack the capability to support uplink transmissions spanning across these symbol types, leading to implementation issues.
Innovation Solution
A method for multiple physical uplink shared channels (multi-PUSCHs) transmission, where a user equipment (UE) receives downlink control information (DCI) to determine separate spatial relations for different symbol types, using distinct antenna settings and spatial domain transmit filters to transmit PUSCHs accordingly, ensuring efficient transmission across SBFD and non-SBFD symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the BS uses different antenna configurations for SBFD and non-SBFD symbols, then transmission and reception can be optimized for each symbol type, but reception inaccuracies occur when UEs transmit multi-PUSCHs across different symbol types
Solution Approach 1:
The patent segments the uplink transmission into two distinct groups: PUSCHs transmitted in non-SBFD symbols use one spatial relation, while PUSCHs transmitted in SBFD symbols use another spatial relation. This segmentation allows the BS to apply appropriate antenna configurations for each symbol type while the UE can reliably determine which spatial relation to use for each PUSCH, resolving the reception accuracy issue.
Solution Approach 2:
The patent applies different spatial relations (local properties) to different PUSCH transmissions based on their symbol type. Non-SBFD PUSCHes use a first spatial relation optimized for non-SBFD conditions, while SBFD PUSCHes use a second spatial relation optimized for SBFD conditions. This local quality approach ensures each transmission uses the most appropriate configuration for its specific context.
2Adaptability or versatility
If UEs are required to support uplink transmissions across different symbol types, then network flexibility is improved, but implementation complexity increases for UEs that lack such capability
Solution Approach 1:
The patent enables UEs to self-determine which spatial relation to use by providing clear rules: if a PUSCH is transmitted in a non-SBFD symbol, the UE uses the first spatial relation; if transmitted in an SBFD symbol, the UE uses the second spatial relation. This self-service mechanism allows UEs with limited capabilities to implement multi-PUSCH transmission without complex configuration management, while still supporting network flexibility.
3Device complexity
If a single spatial relation is used for all PUSCH transmissions, then UE implementation is simplified, but transmission efficiency decreases due to inconsistent antenna configurations
Solution Approach 1:
The patent introduces dynamic spatial relation selection based on the symbol type of each PUSCH transmission. Rather than using a static single spatial relation, the system dynamically switches between the first spatial relation for non-SBFD symbols and the second spatial relation for SBFD symbols. This dynamic approach maintains relatively simple UE implementation while significantly improving transmission efficiency by matching antenna configurations to the appropriate symbol type.
Data Source
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AI summary
A method of multiple physical uplink shared channels (multi-PUSCHs) transmission and a user equipment are provided. The method includes: receiving a downlink control information (DCI) from a network, wherein the DCI indicates a transmission of multi-PUSCHs.