Uplink Spatial Relation Configuration for Multi-TRP PUCCH
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Solution Overview
Problem
In 3GPP Release 16, technical specifications for MIMO using multiple TRPs are being developed, but existing specifications from Release 15 assume a single TRP, leading to suboptimal uplink beam configuration for PUCCH transmission when applied to multiple TRP environments.
Innovation Solution
A terminal is equipped with a reception unit to receive uplink transmission resource information, including spatial relation information, and a setting unit to configure the uplink transmission based on this information, allowing for activation or deactivation of spatial relations for each TRP at different sites.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the same PUCCH resource and spatial relation from Release 15 are applied to all TRPs, then device complexity is reduced and ease of operation is improved, but the uplink beam may fail to reach the base station apparatus and transmission reliability deteriorates
Solution Approach 1:
The patent segments the PUCCH resource configuration by TRP, allowing each TRP to have its own dedicated PUCCH resource and spatial relation. This segmentation resolves the contradiction by enabling TRP-specific optimization (improving reliability) while maintaining a standardized configuration framework (preserving ease of operation).
Solution Approach 2:
The patent applies local quality by configuring PUCCH resources and spatial relations specifically for each TRP location. Each TRP receives tailored configuration parameters optimized for its specific spatial and physical characteristics, thereby improving transmission reliability without requiring complete reconfiguration of the entire system.
2Adaptability or versatility
If Release 15 specifications are applied to multiple TRP environments, then adaptability is reduced, but device complexity and implementation difficulty are lowered
Solution Approach 1:
The patent introduces dynamic adaptability by enabling the terminal to select appropriate PUCCH resources and spatial relations based on the specific TRP being communicated with. This dynamic selection mechanism provides multi-TRP adaptability while maintaining manageable complexity through standardized selection criteria.
Solution Approach 2:
The patent changes key parameters (PUCCH resource identifiers and spatial relation information) on a per-TRP basis. By allowing these parameters to vary according to TRP location and characteristics, the system achieves multi-TRP adaptability without requiring fundamental changes to the overall configuration framework.
Data Source
AI summary
A terminal includes a reception unit configured to receive resource information of an uplink transmission, the resource information including spatial relation information, and a setting unit configured to perform configuration related to the uplink transmission, in accordance with the resource information of the uplink transmission, the resource information including the spatial relation information. The spatial relation information of the resource information of the uplink transmission is activated or deactivated.