Inter-Cell Multi-TRP Resource Mapping for Collision Avoidance

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Solution Overview

Problem

Existing 5G NR systems face challenges in efficiently mapping resources for inter-cell multi-transmission/reception point operations, particularly in managing resource elements for PDSCH and PUSCH, avoiding collisions between uplink and downlink transmissions, and handling simultaneous receptions from multiple cells due to UE capability limitations.

Innovation Solution

The proposed solution involves resource mapping techniques that account for different configuration indices of signals like SSB, CSI-RS, and SRS, using TCI states and QCL sources to optimize resource usage and minimize collisions, allowing simultaneous communications with serving and non-serving cells.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If resource elements are allocated for both PDSCH and PUSCH in inter-cell multi-TRP operation, then communication capacity is improved, but resource collision between uplink and downlink transmissions occurs

Engineering Contradiction:

Improvecommunication capacityVSAvoidresource collision

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent segments the resource elements into different sets based on their usage for PDSCH, PUSCH, or other signals. By dividing the resource space into distinct segments and associating them with different configuration indices, the system prevents collisions between uplink and downlink transmissions while maintaining high communication capacity through efficient resource utilization.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If multiple signals with different configuration indices are mapped to resource elements, then signal flexibility is improved, but resource mapping complexity increases

Engineering Contradiction:

Improvesignal flexibilityVSAvoidresource mapping complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent performs preliminary actions by pre-configuring multiple TCI states with different QCL types before actual resource mapping occurs. This allows the system to efficiently handle multiple signals with different configuration indices during operation, as the mapping rules and configurations are already established in advance, reducing real-time processing complexity.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If UE performs simultaneous reception from multiple cells, then reception diversity is improved, but UE capability limitations cause reception failure

Engineering Contradiction:

Improvereception diversityVSAvoidreception failure

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies local quality by configuring different QCL types (Type A, B, C, or D) for different resource element sets based on the specific reception requirements of each signal. This allows the UE to receive signals with appropriate local characteristics optimized for their specific purposes, improving reception reliability while maintaining diversity benefits.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12432724B2Performing resource mapping of inter-cell multi transmission/reception point operation

Publication Date: 2025.09.30 ZTE CORP

AI summary

Presented are systems, methods, apparatuses, or computer-readable media for resource mapping of inter-cell multi transmission/reception points (TRPs) operation. A wireless communication device may determine at least one resource element that is scheduled for a defined communication associated with a first configuration index, and is assigned for use for at least one signal associated with a second configuration index. The wireless communication device may perform the defined communication using resource elements other than the determined at least one resource element.