PDCCH Detection Method for Multi-Carrier Scheduling
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Solution Overview
Problem
In wireless communication systems, user equipment (UE) faces challenges in identifying its specific downlink control information (DCI) within a bandwidth region of a physical downlink control channel (PDCCH) that carries multiple DCIs, necessitating an effective detection method.
Innovation Solution
A method for PDCCH detection is introduced, where a terminal device performs blind detection based on a PDCCH configuration sent by a network device, utilizing a target carrier combination group that includes multiple carrier combinations, to obtain the target DCI for scheduling resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If blind detection is performed on PDCCH to identify target DCI among multiple DCIs, then the terminal device can accurately identify its specific DCI, but the detection complexity and processing time increase
Solution Approach 1:
The patent segments the PDCCH detection process by dividing the search space into multiple candidate sets organized in a hierarchical structure. The first candidate set contains PDCCH candidates for the first carrier, and the second candidate set contains PDCCH candidates for the second carrier, with each carrier having multiple aggregation levels. This segmentation allows the terminal to systematically search through organized groups rather than all possibilities at once, reducing detection complexity while maintaining accuracy.
Solution Approach 2:
The patent applies preliminary action by pre-configuring the search space structure and candidate set organization before actual detection occurs. The network device configures the search space with multiple candidate sets arranged in a specific hierarchy, and the terminal device uses this pre-established structure to guide its detection process, avoiding the need to search all possibilities from scratch.
2Adaptability or versatility
If multiple DCIs are included in a bandwidth region of PDCCH to increase scheduling flexibility, then resource allocation efficiency improves, but the difficulty of detecting and measuring the target DCI increases
Solution Approach 1:
The patent segments the multiple DCIs into distinct candidate sets organized by carrier and aggregation level. Each candidate set is separated into specific groups (first candidate set for first carrier, second candidate set for second carrier), making it easier to locate and identify the target DCI among multiple possibilities while maintaining the flexibility to schedule multiple carriers.
Solution Approach 2:
The patent introduces an additional organizational dimension by arranging candidate sets in a hierarchical structure with multiple aggregation levels (first aggregation level, second aggregation level, etc.). This dimensional organization adds structure to the search space, enabling the terminal to efficiently navigate and identify target DCIs among multiple scheduled carriers without increased detection difficulty.
Data Source
AI summary
Provided are a PDCCH detection method, a terminal device, a network device, and a storage medium, which are related to the technical field of wireless communication. The PDCCH detection method includes: a terminal device performing blind detection on the basis of a PDCCH configuration issued by a network device, and obtaining target downlink control information (DCI) (S200), wherein the PDCCH configuration corresponds to a target carrier combination set, the target carrier combination set comprises one or more carrier combinations, one carrier combination comprises one or more carriers, and the target DCI is used for scheduling one carrier combination in the target carrier combination set. The PDCCH detection method enables identification and acquisition of DCI corresponding to a terminal device.