PUCCH Resource Determination for Multi-TRP 5G NR Systems
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Solution Overview
Problem
In the 5G NR system, there is no clear solution for configuring PUCCH resources, especially when multiple transmission reception points (TRPs) are supported, and there is a need for terminals to flexibly obtain PUCCH resources in each sub-slot or for each TRP.
Innovation Solution
A resource determination method and apparatus that allows terminals to flexibly obtain PUCCH resources by configuring PUCCH resource sets shared across all sub-slots or TRPs, using indexes to distinguish resources corresponding to different sub-slots or TRPs within the same resource set, without modifying the existing resource configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If PUCCH resources are configured for each sub-slot or each TRP separately, then resource allocation flexibility is improved, but device complexity and configuration overhead increase
Solution Approach 1:
The PUCCH resource set is divided into multiple groups, where each group corresponds to a specific sub-slot or TRP. The network configures a PUCCH resource set containing multiple PUCCH resources, and through segmentation, different groups of resources can be allocated to different sub-slots or TRPs. This allows flexible resource allocation without configuring separate resource sets for each sub-slot or TRP, thus reducing configuration overhead while maintaining adaptability.
Solution Approach 2:
The patent introduces a new dimension of resource allocation by using group indices to associate PUCCH resource groups with specific sub-slots or TRPs. Instead of allocating resources directly in time or space domains, the patent adds a grouping dimension that enables indirect resource allocation. This dimensional change allows the system to achieve flexible resource allocation across multiple sub-slots and TRPs while maintaining a compact configuration structure.
2Reliability
If multiple PUCCH resources are allocated for different TRPs, then communication reliability is improved, but resource configuration complexity increases
Solution Approach 1:
The PUCCH resource set is segmented into multiple groups, with each group dedicated to a specific TRP or sub-slot. This segmentation enables the terminal to select appropriate PUCCH resources based on the target TRP, ensuring reliable communication through TRP-specific resource allocation. The segmentation approach maintains clear resource-TRP correspondence while avoiding the need for completely separate resource sets for each TRP.
Solution Approach 2:
The PUCCH resource set serves multiple functions by being shared across different TRPs and sub-slots through the grouping mechanism. A single PUCCH resource set can be used for feedback to multiple TRPs, with each group within the set dedicated to a specific TRP or sub-slot. This multi-functionality reduces the overall number of resource sets needed while maintaining TRP-specific resource allocation for reliable communication.
3Productivity
If PUCCH resources are shared across all sub-slots and TRPs, then resource utilization efficiency is improved, but the ability to distinguish specific resources for each sub-slot or TRP deteriorates
Solution Approach 1:
The patent introduces group indices as an intermediary mechanism between the shared PUCCH resource set and the specific sub-slots or TRPs. The group index acts as a mediator that maps PUCCH resources to their corresponding sub-slots or TRPs. This intermediary approach allows resources to be shared across multiple sub-slots and TRPs while maintaining clear identification of which resources belong to which sub-slot or TRP, thus preserving resource identification accuracy.
Solution Approach 2:
The patent adds a grouping dimension to the resource allocation structure. By organizing PUCCH resources into groups with distinct group indices, the system creates an additional layer of organization that enables both resource sharing and precise identification. The group index dimension allows the system to track and identify resources across different sub-slots and TRPs without requiring separate resource sets, thus maintaining both efficiency and identification accuracy.
Data Source
AI summary
Disclosed are a resource determination method and apparatus for flexible acquisition of a PUCCH resource by a terminal at each sub-slot or each TRP. At a terminal side, a resource determination method provided in the present disclosure includes receiving configuration signaling, and acquiring at least one physical uplink control channel (PUCCH) resource set on the basis of the configuration signaling, determining a target PUCCH resource set; and according to a PUCCH resource indication domain and the serial number of a target corresponding to the PUCCH, determining a PUCCH resource from the target PUCCH resource set, and the target includes a sub-slot where PUCCH transmission is located and/or a transmission receiving point (TRP) corresponding to the PUCCH.