Multi-TRP QCL Priority Rules for Multi-DCI Scheduling
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE and NR technologies, face challenges in efficiently managing multi-downlink control information (DCI) for multi-transmission/reception points (TRPs), leading to complexities in quasi co-location (QCL) related priority rules and resource allocation, which affect spectral efficiency and user equipment (UE) performance.
Innovation Solution
The implementation of methods for user equipment (UE) to receive and process downlink control information (DCI) on multiple control resource sets (CORESETs), determining fixed higher layer indices to identify CORESET groups, and prioritizing receptions based on QCL properties, allowing for efficient multi-TRP operations and improved resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-DCI based multi-TRP operation is implemented to improve network capacity and spectral efficiency, then the system can support multiple transmission/reception points simultaneously, but the complexity of managing QCL priority rules and CORESET associations increases significantly
Solution Approach 1:
The patent segments the multi-TRP operation by introducing CORESET groups, where each group is associated with a specific TRP through a fixed higher layer index. This segmentation allows the UE to separately manage QCL assumptions for different TRPs, reducing the overall complexity of multi-TRP operation while maintaining support for multiple transmission points simultaneously.
Solution Approach 2:
The patent introduces the fixed higher layer index as an intermediary that associates CORESET groups with specific TRPs. This intermediary simplifies the QCL management by providing a direct mapping relationship, eliminating the need for complex dynamic QCL assumption management and reducing the computational burden on the UE.
2Adaptability or versatility
If the UE monitors PDCCH candidates in overlapping PDCCH monitoring occasions across multiple CORESETs with different QCL type properties, then the UE can receive control information from multiple TRPs, but the processing complexity and resource requirements increase
Solution Approach 1:
The patent applies local quality by assigning different QCL type properties to different CORESET groups, where each group is associated with a specific TRP through a fixed higher layer index. This allows the UE to apply appropriate QCL assumptions locally for each CORESET group, simplifying the processing of overlapping PDCCH monitoring occasions while maintaining the ability to monitor multiple TRPs simultaneously.
3Ease of operation
If fixed higher layer indices are used to identify CORESET groups for multi-TRP operation, then QCL assumption management is simplified, but the flexibility in dynamic resource allocation is reduced
Solution Approach 1:
The patent maintains dynamics by allowing the network to configure multiple CORESET groups with different fixed higher layer indices, enabling flexible resource allocation across multiple TRPs. While each CORESET group has a fixed association with a TRP, the network can dynamically select which CORESET groups to activate and how to allocate resources within each group, preserving operational flexibility while simplifying QCL management.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, on a particular control resource set (CORESET), downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH). The UE may be configured with multi-DCI based multi-transmission/reception point (TRP) operation. The UE may determine, based at least in part on the UE being configured with multi-DCI based multi-TRP operation, a fixed higher layer index that identifies a CORESET group with which the particular CORESET is associated. The UE may perform an operation, associated with receiving the PDSCH or transmitting the PUSCH, based at least in part on the fixed higher layer index identifying the CORESET group with which the particular CORESET is associated. Numerous other aspects are provided.