Multi-Cell DCI Format Alignment for Lower PDCCH Blind Detection Complexity
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Solution Overview
Problem
The challenge of blind detection complexity and reduced detection performance arises when scheduling multiple PDSCHs on multiple cells, as existing methods do not effectively align DCI formats for efficient PDCCH monitoring.
Innovation Solution
Align DCI formats for multi-cell scheduling after size alignments of single-cell scheduling, limiting the total number of DCI sizes through padding bits to reduce blind detection complexity and improve detection performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If DCI formats for multi-cell scheduling are not aligned, then the terminal device can monitor PDCCH candidates for multiple cells, but the blind detection complexity increases and detection performance deteriorates
Solution Approach 1:
The patent applies parameter changes by adjusting the size of DCI formats through padding bits to align them across multiple cells. Specifically, the terminal device determines a target size for DCI formats based on the maximum size among different cells and adjusts the DCI format sizes accordingly, transforming the variable size problem into a unified size structure that reduces blind detection complexity while maintaining multi-cell scheduling capability
Solution Approach 2:
The patent implements equipotentiality by making all DCI formats have the same size through padding, so that the terminal device can treat all cells uniformly during blind detection. This equalization of DCI format sizes across different cells allows the terminal to use a consistent detection procedure for all cells, reducing the complexity that would otherwise arise from handling multiple different DCI sizes
2Device complexity
If DCI format sizes are aligned across multiple cells, then blind detection complexity is reduced, but the number of bits required for scheduling information increases
Solution Approach 1:
The patent applies parameter changes by introducing padding bits to adjust DCI format sizes. The terminal device calculates padding bits based on the difference between the maximum DCI size and the actual DCI size for each cell, and adds these padding bits to the DCI formats. This controlled parameter adjustment achieves size alignment while minimizing the increase in total bits required for scheduling information
3Adaptability or versatility
If the terminal device monitors PDCCH candidates for multiple cells without size alignment, then scheduling flexibility is maintained, but detection performance decreases
Solution Approach 1:
The patent applies parameter changes by standardizing the size parameter of DCI formats across multiple cells through padding. This size standardization improves detection performance by enabling the terminal device to use unified detection procedures for all cells, while the padding mechanism ensures that the original scheduling flexibility is preserved as the padding bits do not affect the meaningful scheduling information
Data Source
AI summary
Example embodiments of the present disclosure relate to methods, devices, and computer storage medium for communication. A terminal device performs a first size alignment of a pair of DCI formats for multi-cell scheduling if a total number of DCI sizes configured to monitor a PDCCH is greater than a predefined number after a plurality of size alignments of a plurality of pairs of DCI formats for single-cell scheduling; and monitors the PDCCH from a network device based on the first size alignment. As such, an order for DCI size alignments may be determined and the total number of DCI sizes may be limited. The DCI formats for multi-cell scheduling may be aligned after size alignments of DCI formats for signal-cell scheduling, thus the blind detection complexity may be reduced and the detection performance may be improved.