Multi-PUSCH Spatial Relation Handling Across SBFD Symbols
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Solution Overview
Problem
In wireless communication systems, particularly in 5G, the inconsistent antenna configurations between Subband-Fully-Duplex (SBFD) and non-SBFD symbols lead to reception inaccuracies and implementation issues when UEs transmit multiple physical uplink shared channels (PUSCHs) across different symbol types, due to varying antenna setups and lack of support for simultaneous transmission and reception.
Innovation Solution
A method for multiple physical uplink shared channels (multi-PUSCHs) transmission, where a 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 manage transmission and reception efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the BS uses different antenna configurations for SBFD and non-SBFD symbols, then transmission and reception can be managed separately for each symbol type, but reception inaccuracies occur when UE transmits multiple PUSCHs across different symbol types
Solution Approach 1:
The patent segments the uplink transmission into two distinct groups based on symbol type: PUSCHs in non-SBFD symbols use spatial relation info from downlink signals, while PUSCHs in SBFD symbols use SRI from DCI. This segmentation resolves the contradiction by providing dedicated spatial relation determination methods for each symbol type, ensuring reliable reception without requiring complex dynamic antenna reconfiguration.
Solution Approach 2:
The patent applies local quality by assigning different spatial relation determination mechanisms to different symbol types. Non-SBFD symbols use one approach (spatial relation from downlink signals) while SBFD symbols use another (SRI from DCI), optimizing each local context for its specific characteristics and resolving the reception accuracy issue without system-wide complexity.
2Ease of operation
If the BS switches between transmission and reception in time-division manner for non-SBFD symbols, then interference control is simplified, but antenna configuration differs significantly from SBFD symbols causing inconsistency
Solution Approach 1:
The patent creates a universal spatial relation determination framework that works across both SBFD and non-SBFD symbols. By defining separate but complementary methods (downlink signal-based for non-SBFD, DCI-based for SBFD), the system achieves multi-functionality that maintains antenna configuration consistency despite different operational modes, resolving the contradiction between operational simplicity and configuration stability.
3Productivity
If UE transmits multiple PUSCHs across SBFD and non-SBFD symbols, then transmission efficiency is improved, but some UEs lack capability to support such transmissions
Solution Approach 1:
The patent uses parameter changes in the DCI format to control multi-PUSCH transmission behavior. The SRI field and other DCI parameters are configured to indicate whether multi-PUSCH transmission across different symbol types is enabled, allowing the system to adapt to different UE capabilities while maintaining high transmission efficiency for capable UEs. This resolves the contradiction by making advanced features optional rather than mandatory.
Data Source
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.