Single DCI Multi-Cell Scheduling via Reference Bandwidth Alignment
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Solution Overview
Problem
Current communication systems face significant L1 signaling overhead when scheduling multiple serving cells, particularly in carrier aggregation scenarios, due to the need for multiple downlink scheduling DCIs, which increases latency and inefficiency.
Innovation Solution
A method and device that receive a resource indication in a Layer 1 signaling message to schedule resources across multiple bandwidth parts in serving cells, determining a reference size and resource based on the indication, and aligning these resources to optimize scheduling, allowing a single DCI to manage multiple serving cells with diverse configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple downlink scheduling DCIs are transmitted for multiple serving cells, then each serving cell can be scheduled independently, but L1 signaling overhead increases significantly
Solution Approach 1:
The patent combines multiple downlink scheduling DCIs into a single DCI message that can schedule multiple serving cells simultaneously. This is achieved by merging the scheduling information for multiple bandwidth parts across different serving cells into one unified DCI structure, thereby reducing L1 signaling overhead while maintaining the ability to independently schedule each serving cell.
Solution Approach 2:
The patent creates a universal DCI structure that can function as a multi-cell scheduling message. This single DCI is designed to universally schedule multiple serving cells with diverse configurations by including flexible fields that can represent different bandwidth parts and serving cells, making the DCI multi-functional rather than cell-specific.
2Productivity
If multiple downlink scheduling DCIs are transmitted for multiple serving cells, then comprehensive resource allocation is achieved, but transmission latency increases
Solution Approach 1:
By merging multiple scheduling decisions into a single DCI transmission, the patent reduces the time required for control signal transmission. Instead of waiting for multiple sequential DCI messages, the terminal can receive all necessary scheduling information in one go, thereby reducing transmission latency while maintaining comprehensive resource allocation across multiple serving cells.
3Quantity of substance
If a single DCI schedules multiple serving cells with diverse configurations, then L1 signaling overhead is reduced, but resource allocation complexity increases
Solution Approach 1:
The patent segments the resource allocation information within the single DCI into distinct fields, each corresponding to specific serving cells or bandwidth parts. This segmentation allows the terminal to parse and process the information in an organized manner, reducing the perceived complexity despite the unified structure. Each segment can be independently interpreted according to its associated serving cell's configuration.
Solution Approach 2:
The patent applies local quality by providing cell-specific or BWP-specific parameters within the unified DCI structure. Each serving cell or bandwidth part has its own dedicated fields or interpreted sections within the DCI, allowing tailored resource allocation for each local context while maintaining the overall single-DCI framework. This ensures that diverse configurations are handled appropriately without requiring separate DCIs.
4Manufacturing precision
If reference bandwidth part alignment is performed across multiple serving cells, then resource allocation accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent performs preliminary alignment of reference bandwidth parts across multiple serving cells during the DCI generation or reception phase. By pre-establishing the alignment relationships and reference points before actual resource allocation, the system reduces the complexity of real-time processing. The terminal can use these pre-aligned reference points to accurately determine resource allocations without performing complex calculations during data transmission.
Data Source
AI summary
Example embodiments of the present disclosure relate to a device, method, apparatus and computer readable storage medium for scheduling serving cells with a signaling message. In example embodiments, a terminal device receives, in a Layer 1 (L1) signaling message, a resource indication to schedule resources on a plurality of bandwidth parts in a plurality of serving cells. The terminal device determines a reference size of a reference bandwidth part. The terminal device determines a reference resource based on the received resource indication and the reference size of the reference bandwidth part. The terminal device further determines alignment between the reference bandwidth part and a scheduled bandwidth part of the plurality of bandwidth parts. The terminal device determines, based on the reference resource and the alignment, a scheduled resource on the scheduled bandwidth part.