Inter-Cell Multi-TRP Scheduling for PDSCH and PUSCH Resource Mapping
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Solution Overview
Problem
Existing 5G NR systems face challenges in resource mapping for inter-cell multi-TRP operations, including unavailable resource elements for PDSCH and PUSCH due to reference signals, collisions between uplink and downlink transmissions, and limited simultaneous signal reception capability.
Innovation Solution
The proposed solution involves mapping synchronization signals (SSB) and channel state information reference signals (CSI-RS) to PDSCH and PUSCH, using transmission configuration indicators (TCI) and quasi-co-location (QCL) sources to optimize resource allocation across serving and non-serving cells, ensuring efficient use of resource elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If resource elements are allocated for reference signals in inter-cell multi-TRP operation, then channel estimation and signal quality measurement are improved, but available resource elements for data transmission (PDSCH/PUSCH) are reduced
Solution Approach 1:
The patent segments the resource allocation by introducing separate indication fields in DCI for serving cell and non-serving cell resource allocations. This allows independent control of resource elements for reference signals and data transmission in different cells, resolving the conflict between channel estimation accuracy and data transmission capacity through structured resource division
Solution Approach 2:
The patent extends resource allocation from a single-cell dimension to a multi-cell dimension by introducing non-serving cell resource element indications. This additional dimensional approach allows the system to allocate reference signal resources in non-serving cells without reducing data resources in the serving cell, effectively resolving the resource trade-off
2Productivity
If uplink and downlink transmissions are scheduled simultaneously in inter-cell multi-TRP operation, then spectral efficiency is improved, but signal collisions and interference occur
Solution Approach 1:
The patent implements dynamic resource allocation where the network can flexibly adjust uplink and downlink resource assignments based on current channel conditions and traffic demands. The DCI format allows dynamic indication of resource element allocations for both serving and non-serving cells, enabling real-time optimization to avoid collisions while maintaining high spectral efficiency
Solution Approach 2:
The patent incorporates feedback mechanisms through the DCI structure that carries resource allocation information from the network to the UE. This feedback loop enables the network to monitor and adjust resource allocations to prevent uplink-downlink collisions, maintaining signal reliability while achieving high spectral efficiency through coordinated resource management
3Reliability
If the UE is configured to receive multiple downlink signals from different cells, then inter-cell coordination and transmission diversity are improved, but the UE's simultaneous reception capability is exceeded
Solution Approach 1:
The patent applies local quality by allowing the UE to focus reception resources on the serving cell with high quality requirements, while using non-serving cell signals for complementary purposes like channel estimation or redundancy. The separate resource indication fields enable the UE to prioritize processing of critical serving cell signals while maintaining capability for inter-cell coordination
Data Source
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AI summary
Presented are systems, methods, apparatuses, or computer-readable media for scheduling performance of resource mapping of inter-cell multi transmission/reception points (TRPs) operation. A wireless communication device may receive, from a wireless communication node, an indication that a set of resources is scheduled for a first defined communication and a second defined communication. The first defined communication is associated with a first physical cell identity (PCI) value, and the second defined communication is associated with a second PCI value.