PUCCH Spatial Relation Selection for Simultaneous Cross-Carrier Uplinks
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Solution Overview
Problem
User equipment (UE) faces ambiguity in selecting spatial relation information for simultaneous physical uplink control channel (PUCCH) resources across multiple component carriers, leading to potential communication failures due to unclear rules for spatial relation selection during overlapping transmissions.
Innovation Solution
The UE receives a spatial relation configuration that defines rules for selecting spatial relation information for simultaneous PUCCH transmissions across multiple component carriers, allowing for either same or different spatial relation information to be used based on priority, fallback configurations, or antenna panel mapping, ensuring clear communication guidelines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE uses multiple PUCCH resources across multiple component carriers simultaneously, then the system capacity and spectral efficiency are improved, but the ambiguity in spatial relation information selection increases leading to potential communication failures
Solution Approach 1:
The patent applies parameter changes by introducing a priority parameter for different PUCCH resources. When multiple PUCCH resources overlap in time across component carriers, the UE uses the priority parameter to determine which spatial relation information to apply. This resolves the ambiguity by changing the selection criterion from undefined to priority-based, ensuring reliable communication while maintaining high system capacity.
Solution Approach 2:
The patent implements preliminary action by pre-configuring priority information for different PUCCH resources before simultaneous transmissions occur. The network entity provides priority indications in advance, allowing the UE to have clear rules ready for spatial relation information selection when overlapping PUCCH resources need to be transmitted simultaneously, preventing communication failures.
2Reliability
If clear rules for spatial relation information selection are established, then communication reliability is improved, but the device complexity increases due to additional configuration and selection logic
Solution Approach 1:
The patent applies self-service by enabling the UE to autonomously select spatial relation information based on pre-configured priority parameters. The UE's spatial relation information selection component automatically determines the appropriate spatial relation by comparing priorities of overlapping PUCCH resources without requiring real-time network intervention, improving reliability while keeping implementation straightforward.
3Productivity
If the UE selects spatial relation information based on priority configuration, then the spectral efficiency is improved through optimized beam selection, but the difficulty of detecting and measuring spatial relations increases
Solution Approach 1:
The patent introduces priority information as an intermediary that mediates between multiple spatial relation information configurations. Instead of directly comparing multiple spatial relations which would be complex, the priority parameter serves as a simple mediator that guides the selection process, making spatial relation detection and measurement easier while still achieving optimized beam selection for high spectral efficiency.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may receive one or more messages scheduling a first uplink transmission over a first physical uplink control channel (PUCCH) resource on a first component carrier and a second uplink transmission over a second PUCCH resource on a second component carrier and, if the first PUCCH resource and the second PUCCH resource overlap in time, the UE 115 may transmit the first uplink transmission and the second uplink transmission using spatial relation information in accordance with a spatial relation configuration that is dedicated for selecting spatial relation information for simultaneous PUCCH transmissions on different component carriers. A network entity may configure the UE with spatial relation information for the overlapping PUCCH resources and the UE may select spatial relation information to use for the simultaneous uplink transmissions in accordance with the spatial relation configuration.