PDCCH Coverage via CORESET Bundling for RedCap Terminals
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Solution Overview
Problem
RedCap terminals experience performance loss in receiving downlink channels, particularly the Physical Downlink Control Channel (PDCCH), due to reduced bandwidth and the number of antennas, necessitating enhanced coverage solutions.
Innovation Solution
The method involves bundling multiple symbol sets of the CORESET or expanding the number of symbols in the CORESET to achieve higher aggregation levels and enhanced coverage of the PDCCH, allowing for frequency domain diversity gains and improved reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If bandwidth and number of antennas are reduced for RedCap terminals, then device complexity and cost are reduced, but reception performance of downlink channels deteriorates
Solution Approach 1:
The patent merges multiple CORESETs into a single bundled CORESET, combining their resources to achieve higher aggregation levels. This allows RedCap terminals with reduced antennas and bandwidth to achieve better reception performance by aggregating control channel resources across multiple CORESETs, effectively compensating for the hardware reductions while maintaining lower device complexity
2Reliability
If aggregation level of PDCCH is increased, then coverage and reception performance are improved, but resource overhead and system complexity increase
Solution Approach 1:
The patent segments the PDCCH reception process into multiple bundled CORESETs, where each CORESET can be independently configured and managed. This segmentation allows the system to achieve high aggregation levels for improved coverage while maintaining manageable complexity through modular configuration of individual CORESETs that are then bundled together
3Reliability
If multiple CORESETs are bundled, then frequency domain diversity gains are achieved, but configuration complexity and signaling overhead increase
Solution Approach 1:
The patent creates a bundled CORESET that serves multiple functions simultaneously: it provides frequency domain diversity through bundling, maintains independent configurability of constituent CORESETs, and enables flexible adaptation to different RedCap terminal capabilities. This multi-functional design achieves frequency diversity gains while keeping configuration manageable through a unified bundled structure
Data Source
AI summary
The embodiments of the present disclosure provide a wireless communication method, a terminal device, and a network device. The method comprises: obtaining configuration information of a search space of a PDCCH; and bundling, according to the configuration information, multiple symbol sets of at least one CORESET so as to achieve the enhanced coverage of the PDCCH.