Trigger State Identification via CORESET Pool Index for Multi-TRP Signaling
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Solution Overview
Problem
In wireless communications systems, efficiently identifying a trigger state for aperiodic reference signal measurements across multiple transmission and reception points (TRPs) is challenging due to high overhead in signaling trigger states in downlink control information (DCI), especially when multiple TRPs are involved, leading to underutilization of DCI resources.
Innovation Solution
A user equipment (UE) receives different lists of trigger states associated with various TRPs and identifies the appropriate trigger state based on the control resource set (CORESET) pool index, allowing it to differentiate between DCI from different TRPs and reduce the overhead in signaling trigger states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple TRPs are supported with separate trigger state lists, then the UE can accurately identify trigger states for each TRP, but the DCI overhead increases and resources are underutilized
Solution Approach 1:
The patent segments the trigger state identification process by associating different trigger state lists with different CORESET pool indices. Each TRP is linked to a specific CORESET pool index, and the UE uses this index to select the appropriate trigger state list from multiple lists. This segmentation allows accurate TRP-specific trigger state identification without requiring separate signaling for each TRP, thereby reducing DCI overhead while maintaining measurement precision.
2Device complexity
If a single trigger state list is used for all TRPs, then DCI overhead is reduced, but the UE cannot differentiate between TRPs
Solution Approach 1:
The patent introduces a new dimension for trigger state selection by utilizing the CORESET pool index as an additional identifier. Instead of using a single flat trigger state list, the system organizes trigger states into multiple lists indexed by CORESET pool index. The UE determines which list to use based on the CORESET pool index of the receiving TRP, enabling TRP differentiation while maintaining compact DCI signaling. This dimensional approach allows the system to distinguish between TRPs without increasing DCI overhead.
3Adaptability or versatility
If trigger states are signaled for each TRP separately, then TRP-specific measurements are enabled, but DCI resource utilization becomes inefficient
Solution Approach 1:
The patent implements universality by creating a multi-functional trigger state identification mechanism. The CORESET pool index serves multiple purposes: it identifies the TRP, selects the appropriate trigger state list, and enables the UE to differentiate between multiple TRPs. This universal approach allows the system to support TRP-specific measurements while efficiently utilizing DCI resources, as the same index structure serves both identification and selection functions simultaneously.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Generally, the described techniques allow a user equipment (UE) to efficiently identify a trigger state that is linked to a configuration for receiving and measuring reference signals from a transmission and reception point (TRPs). The UE may receive an indication of different lists of trigger states associated with different TRPs, and, when the UE receives downlink control information (DCI) indicating a trigger state index, the UE may reference an appropriate list to identify the trigger state corresponding to the trigger state index. In particular, the UE may determine a control resource set (CORESET) pool index of a CORESET in which the DCI is received, and the UE may identify the trigger state corresponding to the trigger state index from a list of trigger states associated with the CORESET pool index.