Wireless Node PDCCH Scheduling Cell Sets
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems, particularly in NR technology, face challenges in efficiently scheduling multiple carriers using a single Physical Downlink Control Channel (PDCCH), which limits their ability to adapt to diverse application scenarios and meet different performance demands.
Innovation Solution
A method for wireless communications that involves receiving an information block to determine W1 cell sets, monitoring multiple PDCCH candidates, and using a DCI format to schedule serving cells simultaneously within a cell set, optimizing the design of the DCI format and reducing header overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single PDCCH schedules multiple carriers simultaneously, then scheduling efficiency and system adaptability are improved, but the DCI format size and control information complexity increase
Solution Approach 1:
The patent segments the scheduling of multiple carriers by introducing cell set grouping, where carriers are organized into sets (first cell set, second cell set, etc.) and each set is scheduled using a dedicated DCI format. This segmentation allows the system to handle multiple carriers without creating a single overly complex DCI format, as each cell set has its own manageable DCI structure.
Solution Approach 2:
The patent creates a universal scheduling mechanism where a single PDCCH can schedule multiple cell sets simultaneously. The gNB can transmit one PDCCH that includes scheduling information for multiple cell sets, making the PDCCH multi-functional and capable of handling diverse scheduling scenarios without requiring separate PDCCHs for each carrier or cell set.
2Adaptability or versatility
If multiple PDCCH candidates are monitored for different DCI formats, then scheduling flexibility is improved, but blind decoding complexity and processing time increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple DCI formats with different sizes before the actual scheduling process. The UE is provided with configuration information that includes multiple DCI formats in advance, allowing the UE to prepare the appropriate decoding parameters beforehand. This reduces the processing time during actual scheduling, as the UE doesn't need to dynamically determine the correct DCI format size from scratch.
Solution Approach 2:
The patent utilizes parameter changes by varying the DCI format size and structure according to the specific cell set being scheduled. Different cell sets can have different numbers of carriers and different scheduling requirements, so the DCI format parameters (such as field sizes and structure) are adjusted accordingly. This allows the system to maintain scheduling flexibility while optimizing the DCI format for each specific scenario.
3Adaptability or versatility
If DCI format size is optimized for the largest cell set, then all cell sets can be scheduled, but smaller cell sets experience unnecessary overhead
Solution Approach 1:
The patent segments the scheduling process by assigning different DCI formats to different cell sets based on their specific requirements. Each cell set can have a DCI format optimized for its particular size and characteristics, rather than all cell sets using a single oversized format. This segmentation allows smaller cell sets to use more compact DCI formats, reducing unnecessary overhead.
Solution Approach 2:
The patent applies partial action by providing DCI formats that are appropriately sized for each cell set rather than using a maximum-size format for all cases. The system provides multiple DCI format options, and the gNB selects the appropriate format for each cell set, avoiding the excessive overhead that would result from using a maximum-size format for smaller cell sets.
Data Source
AI summary
A node receives a first information block, and the first information block is used to determine W1 cell sets; a node monitors multiple PDCCH candidates; a number of serving cell(s) comprised in one of the W1 cell sets is not greater than a first threshold; one of the multiple PDCCH candidates is monitored for a first DCI format, and a first cell set is one of the W1 cell sets, and the first DCI format is used to schedule the first cell set at the same time; one of the multiple PDCCH candidates belongs to a first search space set, and an indicator value associated with the first cell set is used to determine a PDCCH candidate monitored for the first DCI format; a first quantity value is equal to a largest number among numbers of serving cell(s) respectively comprised in the W1 cell sets.