Multi-TRP PDCCH Search Space Configuration for Reliable NR Control
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Solution Overview
Problem
The New Radio (NR) Rel-16 protocol lacks a detailed solution for multi-Transmission/Reception Point (TRP) enhancement of the Physical Downlink Control Channel (PDCCH), which is essential for improving communication reliability and flexibility in high-frequency systems.
Innovation Solution
A method for PDCCH configuration that enables multi-TRP enhancement by reporting terminal capabilities supporting joint use of multiple downlink positioning signals, configuring N search spaces with associated PDCCHs, and utilizing quasi-co-location (QCL) assumptions to optimize beam management and reduce detection complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple TRPs simultaneously transmit downlink data to UE using NR Rel-16 protocol, then communication reliability is improved, but the protocol lacks detailed solution for PDCCH multi-TRP transmission
Solution Approach 1:
The patent segments the PDCCH transmission by configuring multiple search space sets (first search space set and second search space set) corresponding to different TRPs. Each search space set independently monitors PDCCH from a specific TRP, dividing the monolithic PDCCH monitoring function into distributed segments that can operate autonomously, thereby enabling multi-TRP support while maintaining manageable complexity through modular configuration
Solution Approach 2:
The patent introduces a new dimension of search space set identification by configuring search space sets with different search space IDs (first search space ID and second search space ID) for different TRPs. This dimensional separation in the search space configuration space allows the system to distinguish and manage PDCCH transmissions from multiple TRPs without interfering with each other, resolving the protocol gap in a structured manner
2Area of stationary object
If the terminal device monitors PDCCH from multiple TRPs, then coverage is improved, but detection complexity increases
Solution Approach 1:
The patent segments the PDCCH detection process by configuring separate search space sets for different TRPs, each with distinct monitoring parameters. The terminal device can independently monitor each search space set according to its specific configuration (time-domain offset, frequency-domain resources, etc.), dividing the complex multi-TRP detection task into manageable independent sub-tasks that reduce overall detection complexity while extending coverage
Solution Approach 2:
The patent applies local quality by allowing each search space set to have customized monitoring parameters tailored to its corresponding TRP's characteristics. The terminal device can optimize detection strategies for each search space set based on local conditions (signal strength, interference patterns, timing relationships), improving detection efficiency and reducing complexity compared to uniform monitoring across all TRPs
Data Source
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AI summary
Provided in the embodiments of the present invention are a physical downlink control channel (PDCCH) configuration method, a terminal device and a storage medium, which are used for realizing multi-TRP enhancement of a PDCCH. The embodiments of the present invention may comprise: a first terminal device receiving first configuration information sent by a first device, wherein the first configuration information indicates N first search spaces; PDCCHs corresponding to the N first search spaces are associated with each other, and/or the N first search spaces are associated with each other; the N first search spaces correspond to the PDCCHs; and N is an integer greater than or equal to 2.