TCI State to DMRS Ports Group Mapping for Multi-TRP Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In multi-TRP wireless networks, existing technologies face challenges in efficiently indicating the Transmission Configuration Indication (TCI) and corresponding demodulation reference signal (DMRS) ports for multi-TRP operation, especially when different quasi-co-location (QCL) assumptions apply to different DMRS ports.
Innovation Solution
The proposed solution involves an apparatus and method for determining and signaling the TCI state to DMRS ports group mapping in a multi-TRP wireless network. This includes processor circuitry that configures multiple TCI state groups and maps them to DMRS ports groups, with the ability to select a TCI state group and provide corresponding DMRS ports group information to user equipment (UE) via radio front end circuitry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple TCI states are indicated for multi-TRP operation, then the system supports multiple QCL assumptions for different DMRS ports, but the signaling complexity and device complexity increase
Solution Approach 1:
The patent segments TCI states into multiple groups where each group is associated with specific DMRS port groups. This segmentation allows the system to indicate multiple TCI states for multi-TRP operation while reducing signaling complexity by organizing states into manageable groups rather than indicating all states individually.
Solution Approach 2:
The patent performs preliminary configuration of TCI state groups and their associations with DMRS port groups before actual data transmission. This preliminary action allows the UE to have pre-configured knowledge of which TCI states apply to which DMRS ports, reducing the need for complex dynamic signaling during operation.
2Measurement precision
If TCI states are dynamically indicated for each DMRS port, then accurate QCL assumptions are applied, but the signaling overhead increases
Solution Approach 1:
The patent merges the indication of TCI states with DMRS port group indications. By combining these two pieces of information into a single signaling mechanism, the system maintains accurate QCL assumptions for each DMRS port while reducing the total signaling overhead that would result from separate indications.
Solution Approach 2:
The patent creates a universal TCI state group structure that can serve multiple DMRS port groups. This multi-functional approach allows a single TCI state group indication to provide accurate QCL assumptions for multiple ports, reducing the need for separate indications for each port.
3Reliability
If separate TCI states are configured for different DMRS ports, then proper QCL assumptions are maintained, but the configuration complexity increases
Solution Approach 1:
The patent segments the configuration process into TCI state group definitions and DMRS port group associations. This segmentation maintains the reliability of QCL assumptions by ensuring each DMRS port group is correctly associated with appropriate TCI states, while reducing configuration complexity through the structured grouping approach.
Solution Approach 2:
The patent performs preliminary configuration of TCI state groups and their associations with DMRS port groups before actual operation. This preliminary configuration establishes correct QCL assumptions in advance, simplifying the operational phase and reducing the complexity of real-time configuration management.
Data Source
AI summary
The present disclosure provides systems and methods for mapping transmission configuration indication (TCI) states to demodulation reference signal (DMRS) ports groups in a wireless network. For instance, a TCI state to DMRS ports group mapping of a user equipment (UE) can be determined. Each DMRS port in a DMRS ports group shares a quasi-co-location (QCL) assumption. The TCI state to DMRS ports group mapping comprises multiple TCI state groups. The TCI state to DMRS ports group mapping corresponds each TCI state group to one or more DMRS ports groups. A TCI state group from the DMRS ports group mapping can be selected for the UE. Data indicative of the selected TCI state group and the corresponding one or more DMRS ports groups can be provided to the UE based at least in part on the TCI state group from the DMRS ports group mapping.