UE Frequency Domain Region Segmentation for Multi-TRP TCI States
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Solution Overview
Problem
Existing communication systems, such as LTE, LTE-A, and NR, face challenges in efficiently managing and signaling frequency-domain resources for multiple transmission/reception points (TRPs), particularly in configuring and indicating multiple Transmission Configuration Indication (TCI) states.
Innovation Solution
The proposed solution involves a user equipment (UE) that receives downlink control information (DCI) signaling, which includes a Transmission Configuration Indication (TCI) indicator specifying two or more TCI states and a frequency-domain resource assignment. The UE determines regions in the frequency domain for each TCI state, where each region is an integer multiple of a precoding resource block group (PRG), and ensures that regions of different TCI states do not overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple TCI states are configured for multiple TRPs, then the adaptability and resource utilization efficiency are improved, but the device complexity and signaling overhead increase
Solution Approach 1:
The patent segments the frequency-domain resources into multiple non-overlapping regions, with each region associated with a specific TCI state. This segmentation allows the UE to process each TCI state independently for its corresponding frequency region, reducing the overall processing complexity while maintaining support for multiple TRPs. The frequency domain is divided into distinct regions rather than handling all resources uniformly.
Solution Approach 2:
The patent applies local quality by allowing different precoding configurations and TCI states to be applied to different frequency-domain regions. Each region can have its own specific characteristics and parameters optimized for the corresponding TRP, rather than applying a uniform configuration across all frequency resources. This enables tailored optimization for each TRP while managing complexity.
2Productivity
If frequency-domain resources are allocated for multiple TCI states, then the resource utilization efficiency is improved, but the signaling overhead increases
Solution Approach 1:
The patent merges the indication of frequency-domain resources and TCI states by associating TCI states with specific frequency-domain regions within the same resource assignment. Instead of separate signaling for resources and TCI states, the system combines these indications, where the frequency-domain resource assignment implicitly or explicitly indicates which TCI state applies to which region, reducing overall signaling overhead.
Solution Approach 2:
The frequency-domain resource assignment mechanism serves multiple functions: it allocates resources to the UE and simultaneously indicates which TCI states should be applied to which frequency regions. This multi-functionality reduces the need for separate dedicated signaling for TCI state indication, thereby reducing signaling overhead while maintaining efficient resource allocation.
Data Source
AI summary
The present disclosure relates to a user equipment (UE) and a scheduling node, as well as to the corresponding methods. In particular, a downlink control information (DCI) signaling carries a Transmission Configuration Indication (TCI) indicator specifying that two or more TCI states are configured and a frequency-domain resource assignment indicating frequency-domain resources allocated for the two or more TCI states. For each TCI state of the two or more TCI states, one or more regions in frequency domain is/are determined, each region having an integer multiple of a precoding resource block group (PRG), said integer being equal to or larger than 1, wherein regions of different TCI states do not overlap. The data are received or transmitted for each TCI state on the frequency-domain resources in the determined frequency-domain region.