PUCCH Resource Grouping for Multi-TRP Coordination
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing physical uplink control channel (PUCCH) resource grouping across multiple transmission and reception points (TRPs), leading to suboptimal resource allocation and performance in multi-TRP operations.
Innovation Solution
The proposed solution involves configuring PUCCH resource groups for multiple TRPs, where specific PUCCH resources are time-division multiplexed or partially overlapping, and using downlink control information messages to schedule PUCCH transmissions, ensuring efficient resource utilization and coordination among TRPs through PUCCH resource group configurations and CORESET associations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If PUCCH resources are allocated for multiple TRPs without resource grouping, then resource allocation is simple, but resource utilization efficiency deteriorates and transmissions collide
Solution Approach 1:
The patent divides PUCCH resources into multiple groups (first group and second group) associated with different TRPs. Each group is independently configured and managed, allowing separate time-division multiplexing strategies for different TRP pairs. This segmentation resolves the contradiction by enabling efficient resource utilization through grouped management while maintaining allocation simplicity within each group.
Solution Approach 2:
The patent introduces a new dimension of resource organization by creating multiple PUCCH resource groups with different time-division multiplexing configurations. Instead of managing all resources in a single flat structure, resources are organized in groups that can be independently configured, adding a hierarchical dimension to resource management that improves overall utilization efficiency.
2Reliability
If PUCCH resources are fully time-division multiplexed across all TRPs, then resource collisions are avoided, but resource flexibility and partial overlap capabilities deteriorate
Solution Approach 1:
The patent applies different time-division multiplexing characteristics to different PUCCH resource groups. The first group has resources that are time-division multiplexed to avoid collisions, while the second group has resources that are not fully time-division multiplexed to allow partial overlap. This local differentiation resolves the contradiction by providing both collision avoidance where needed and flexibility where applicable.
3Productivity
If separate PUCCH resource configurations are used for each TRP, then TRP-specific optimization is achieved, but system complexity and configuration overhead increase
Solution Approach 1:
The patent creates a universal PUCCH resource group structure that can serve multiple TRPs. Each resource group is associated with multiple TRPs and can be used for transmissions to any of them. This multi-functional design allows TRP-specific optimization while reducing overall system complexity, as the same resource group structure serves multiple purposes across different TRP pairs.
Data Source
AI summary
Systems, devices, and techniques for physical uplink control channel (PUCCH) resource grouping in wireless communication systems that include transmission and reception points (TRPs) are described. A described technique performed by a user equipment (UE) includes receiving a PUCCH resource group configuration associated with TRPs, including a first TRP and a second TRP; and performing PUCCH transmissions to the TRPs in accordance with the PUCCH resource group configuration. The PUCCH resource group configuration can include a configuration for a first group of PUCCH resources associated with the first TRP and a second group of PUCCH resources associated with the second TRP.