PDCCH Candidate Set Mapping for Lower-Complexity Multi-Cell Scheduling
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in wireless signal transmission and reception procedures, particularly in managing multiple access systems and carrier aggregation scenarios.
Innovation Solution
The method and apparatus involve monitoring and configuring physical downlink control channel (PDCCH) candidate sets within a search space (SS) on a scheduling cell, associating each set with a minimum cell index, and using carrier indicator (CI) values to optimize signal transmission and reception across multiple cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple PDCCH candidate sets are monitored across multiple cells, then scheduling coverage is improved, but blind decoding complexity increases
Solution Approach 1:
The patent segments PDCCH candidate sets by associating each set with a specific cell index. The UE monitors multiple PDCCH candidate sets corresponding to different cells, but processes them in an organized manner where each set is handled separately according to its associated cell index, thereby managing complexity while maintaining comprehensive scheduling coverage
Solution Approach 2:
The patent combines multiple PDCCH candidate sets from different cells into a unified monitoring process on the scheduling cell. By merging the monitoring of multiple cell-specific candidate sets into a single scheduling cell operation, the system achieves broad scheduling coverage without proportionally increasing UE complexity
2Adaptability or versatility
If PDCCH candidates are configured for multiple cells, then multi-cell scheduling capability is improved, but processing overhead increases
Solution Approach 1:
The patent applies local quality by associating each PDCCH candidate set with a specific cell index, creating a localized mapping relationship. This allows the system to handle multiple cells with differentiated processing requirements, where each candidate set is processed according to its specific cell association, improving multi-cell scheduling capability while optimizing processing overhead through targeted rather than uniform processing
3Measurement precision
If blind decoding is performed across all PDCCH candidates, then detection accuracy is improved, but power consumption increases
Solution Approach 1:
The patent performs preliminary organization of PDCCH candidate sets by cell index before the actual blind decoding process. By pre-grouping candidates according to their associated cell indices, the system enables more efficient decoding operations that maintain detection accuracy while reducing unnecessary processing, thereby lowering power consumption during blind decoding operations
Data Source
AI summary
The present disclosure relates to a wireless communication system and, specifically, to a method and a device therefor, the method comprising the steps of: monitoring a plurality of PDCCH candidate sets within an SS set on a scheduling cell, to detect a PDCCH including scheduling information on at least one cell, wherein each PDCCH candidate set is associated with only one corresponding cell index, and if the at least one cell corresponds to a plurality of cells, PDCCH candidates for the PDCCH are configured in a PDCCH candidate set associated with a smallest cell index among cell indexes of the plurality of cells; and performing data communication on the at least one cell on the basis of the PDCCH.