PDCCH Reception via Multiple CORESETs for DCI Reliability
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Solution Overview
Problem
Current wireless communication systems face challenges in achieving low block error rates for downlink control information (DCI) in next-generation radio access technologies, particularly in high-reliability applications, where existing methods are inefficient in resource management and error reduction.
Innovation Solution
The proposed solution involves a resource mapping method for enhancing DCI detection performance by increasing the aggregation level of control channel elements (CCEs) and configuring physical downlink control channels (PDCCHs) across multiple CORESETs, allowing for efficient allocation of resources and reduced error rates through advanced signaling and bundling of PDCCH candidates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the aggregation level of control channel elements (CCEs) is increased to enhance DCI detection performance, then the reliability of DCI detection is improved, but the resource consumption increases
Solution Approach 1:
The patent divides the control channel resources into multiple CORESETs (control resource sets), each containing multiple CCEs. By segmenting the search space across multiple CORESETs and allowing selective monitoring of PDCCH candidates in different CORESETs, the system achieves high detection reliability without requiring maximum aggregation levels in all cases, thus optimizing resource consumption.
Solution Approach 2:
The patent enables dynamic configuration of multiple CORESETs with different aggregation levels and search spaces. The terminal can adaptively select which CORESETs to monitor based on current channel conditions and reliability requirements, allowing the system to dynamically adjust resource allocation rather than statically assigning high aggregation levels to all PDCCH transmissions.
2Reliability
If multiple CORESETs are configured and PDCCH candidates are bundled across them, then error rates are reduced through diversity gain, but the device complexity increases
Solution Approach 1:
The patent segments the PDCCH monitoring task across multiple CORESETs, each with its own search space and aggregation level configuration. By dividing the monitoring task into manageable segments (different CORESETs) rather than requiring simultaneous processing of all candidates in a single large search space, the terminal complexity is reduced while still achieving diversity gain through cross-CORESET bundling.
Solution Approach 2:
The patent allows the terminal to monitor a subset of PDCCH candidates across multiple CORESETs rather than requiring monitoring of all possible candidates. The network can configure the terminal to focus on specific CORESETs or candidate sets based on current traffic conditions, achieving sufficient error rate reduction without requiring the terminal to process every possible PDCCH candidate, thus managing complexity.
3Reliability
If the aggregation level is increased to meet high reliability requirements, then the block error rate (BLER) for DCI is reduced, but the resource allocation efficiency decreases
Solution Approach 1:
The patent applies different aggregation levels in different CORESETs based on local requirements. Instead of uniformly applying high aggregation levels across all control channel resources, the system can configure CORESETs with aggregation levels appropriate to their specific functions and channel conditions, achieving high BLER performance where needed while maintaining efficiency in other areas.
Solution Approach 2:
The patent enables dynamic adjustment of aggregation levels across different CORESETs based on real-time channel conditions and traffic requirements. The network can reconfigure CORESET parameters including aggregation levels without requiring full system reconfiguration, allowing the system to maintain high resource allocation efficiency while adapting to changing reliability requirements.
Data Source
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AI summary
Provided are a physical downlink control channel (PDCCH) reception method performed by a terminal in a wireless communication system, and a terminal using same. The method comprises receiving, from a base station, allocation information for allocating a plurality of control resource sets (CORESETs), wherein the CORESETs are resources limited to some bands among system bands of the base station in a frequency region, and a single PDCCH is received via the plurality of CORESETs indicated by the allocation information.