Joint CORESET Resource Mapping for Multi-TRP PDCCH Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems with multiple TRPs face challenges in enhancing the reliability and robustness of Physical Downlink Control Channel (PDCCH) transmission due to limitations in resource mapping and signaling for joint CORESET configurations across multiple TRPs.
Innovation Solution
The implementation of joint CORESET configurations that combine multiple CORESETs for PDCCH transmission, utilizing resource mapping schemes such as separate, concatenated, and joint resource mappings, along with signaling mechanisms like RRC and MAC CE, to enhance PDCCH transmission reliability and robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate CORESETs are used for PDCCH transmission from multiple TRPs, then spatial diversity is achieved, but resource mapping complexity and signaling overhead increase
Solution Approach 1:
The patent combines multiple separate CORESETs into a single joint CORESET that can accommodate PDCCH transmissions from multiple TRPs. This merging approach maintains the spatial diversity benefits of multiple TRPs while simplifying resource mapping by providing a unified resource pool, thereby reducing the complexity associated with managing multiple independent CORESET configurations.
2Reliability
If joint CORESET configuration is implemented across multiple TRPs, then PDCCH transmission robustness is improved, but signaling overhead increases
Solution Approach 1:
The joint CORESET configuration is designed to serve multiple TRPs simultaneously with a single unified configuration structure. This multi-functional approach allows the same CORESET to be used for PDCCH transmissions from different TRPs, reducing the need for separate signaling for each TRP and thereby lowering overall signaling overhead while maintaining transmission robustness.
3Reliability
If resources from multiple CORESETs are mapped into joint CORESET, then spatial and time-frequency diversity are exploited, but resource management complexity increases
Solution Approach 1:
The joint CORESET is divided into multiple resource pools, each corresponding to a specific TRP or transmission occasion. This segmentation allows for organized and systematic resource allocation while maintaining the benefits of a unified joint CORESET structure. The segmented approach simplifies resource management by providing clear boundaries and allocation rules for each segment, reducing the overall complexity of managing resources across multiple TRPs.
Data Source
AI summary
Methods and apparatus of resource mapping and signaling indication for joint CORESET for enhanced PDCCH transmission with multiple TRPs are disclosed. The apparatus includes: a processor that generates a joint Control Resource Set (CORESET) configuration for configuring a joint CORESET based on a plurality of CORESETs for a Physical Downlink Control Channel (PDCCH) transmission, wherein the joint CORESET comprises a plurality of resources from the CORESETs mapped therein based on a resource mapping scheme; and a transmitter that transmits a configuration signaling for the joint CORESET configuration, and transmits the PDCCH on the resources of the joint CORESET.