MAC Control Element Spatial Relation Update for PUCCH Resources
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently updating the spatial relation configuration for physical uplink control channel (PUCCH) transmissions, particularly in managing multiple PUCCH resources and applying spatial relation information and power control parameters effectively across these resources.
Innovation Solution
The method involves receiving or generating a medium access control (MAC) control element (CE) that indicates updates to the spatial relation configuration for PUCCH transmissions, identifying specific PUCCH resources and associated spatial settings and power control parameters, and applying these updates to individual or grouped PUCCH resources based on included bits or indications, thereby updating the spatial relation configuration and transmitting PUCCH communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If spatial relation configuration is updated for each PUCCH resource individually, then configuration accuracy is improved, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent segments PUCCH resources into groups and applies spatial relation configurations at the group level rather than individually to each resource. This segmentation approach maintains configuration accuracy for each resource while reducing the overall complexity of configuration management through hierarchical structure.
Solution Approach 2:
The patent merges multiple PUCCH resources into groups that share common spatial relation configurations. By combining resources with similar characteristics into single configuration units, the system reduces signaling overhead and simplifies management while preserving the necessary spatial relation accuracy for each underlying resource.
2Loss of energy
If spatial relation configuration is updated for grouped PUCCH resources, then signaling overhead is reduced, but configuration flexibility decreases
Solution Approach 1:
The patent implements dynamic configuration where PUCCH resource groups and their spatial relation configurations can be adjusted based on current transmission needs. The system can dynamically form, modify, or dissolve groups and update configurations in response to changing channel conditions and traffic requirements, maintaining flexibility while reducing overhead.
Solution Approach 2:
The patent applies partial updating mechanisms where only certain groups or certain parameters within groups are updated when changes are needed, rather than forcing updates across all resources. This selective approach reduces signaling overhead while preserving the ability to make targeted configuration changes where needed.
3Reliability
If multiple spatial relation configurations are maintained for different PUCCH resources, then transmission performance is improved, but processing complexity increases
Solution Approach 1:
The patent applies local quality by maintaining detailed spatial relation configurations at the individual PUCCH resource level where they are needed for optimal transmission performance, while using coarser group-level configurations for resources with similar characteristics. This hierarchical approach preserves transmission performance where critical while reducing processing complexity through selective detail.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a medium access control (MAC) control element (CE) that indicates an update to a spatial relation configuration of the UE for physical uplink control channel (PUCCH) transmissions. The update may apply to a first PUCCH resource and may apply to other PUCCH resources in a group of PUCCH resources to which the first PUCCH resource belongs based at least in part on a bit included in the update or an indication of which PUCCH resources are to be in the group of PUCCH resources. The UE may update the spatial relation configuration of the UE for the first PUCCH resource or for all PUCCH resources in the group of PUCCH resources. The UE may transmit a PUCCH communication on at least the first PUCCH resource. Numerous other aspects are described.