PDCCH Channel Monitoring for Multi-Cell CCE Index Determination
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Solution Overview
Problem
The existing methods for determining control channel element (CCE) indexes based on carrier indicator fields (CIF) are inapplicable in cross-carrier scheduling scenarios where a single DCI format schedules uplink and/or downlink channels for multiple cells.
Innovation Solution
A method and apparatus for channel monitoring that determines CCE indexes based on a carrier indication value configured by the network device for a cell combination scheduled by the first DCI, allowing simultaneous scheduling of uplink and/or downlink channels for at least two cells, using three configuration schemes to optimize resource utilization and reduce computational complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single DCI format schedules uplink and/or downlink channels for multiple cells (cross-carrier scheduling), then spectrum utilization is improved, but the existing method for determining CCE indexes using CIF becomes inapplicable
Solution Approach 1:
The patent changes the parameter used for CCE index determination from CIF (Carrier Indication Field) to a new parameter structure that includes a first carrier indication value and a first cell combination indicator. This parameter transformation enables the system to support multiple cells scheduled by a single DCI format while maintaining unique CCE index determination for each cell combination.
Solution Approach 2:
The patent segments the carrier indication mechanism into two distinct components: a first carrier indication value that identifies the primary carrier, and a first cell combination indicator that identifies the specific combination of cells. This segmentation allows the system to uniquely identify and manage CCE resources for each cell combination scheduled by cross-carrier DCI formats.
2Adaptability or versatility
If multiple cell combinations are scheduled by a single DCI, then scheduling flexibility is improved, but CCE resource overlap and confusion increases
Solution Approach 1:
The patent introduces a first cell combination indicator as an intermediary parameter that mediates between the DCI format and the CCE resource allocation. This intermediary explicitly indicates which cell combination is being scheduled, allowing the terminal to reliably determine the correct CCE indexes even when multiple cell combinations are supported by a single DCI format.
Solution Approach 2:
The patent adds an additional dimension to the carrier indication by introducing the cell combination indicator alongside the carrier indication value. This dimensional expansion creates a two-dimensional identification space (carrier × cell combination) that uniquely identifies CCE resources for each scheduled cell combination, eliminating overlap and confusion.
Data Source
AI summary
A channel monitoring method and apparatus, and a terminal, a network device and a storage medium are provided. The method includes: a terminal determining, on the basis of a first carrier indication value, a CCE index occupied by a PDCCH candidate corresponding to first DCI, wherein the first DCI represents DCI capable of simultaneously scheduling uplink and/or downlink channels of at least two cells; and the first carrier indication value represents a carrier indication value configured by a network side for a first cell combination, the first cell combination being a cell combination scheduled by the first DCI.