DCI Resource Indication for Multi-Carrier BWP Scheduling
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Solution Overview
Problem
The current NR system is limited to scheduling only one carrier with one piece of downlink control information (DCI), leading to significant physical downlink control channel (PDCCH) overheads in dynamic spectrum sharing scenarios.
Innovation Solution
A method and device that support scheduling of multiple carriers or bandwidth parts (BWPs) using frequency-domain resource indication information in downlink control information (DCI), allowing for efficient determination and indication of scheduling resources across multiple carriers or BWPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If one piece of DCI schedules only one carrier, then the scheduling is simple and straightforward, but the PDCCH overheads increase significantly in dynamic spectrum sharing scenarios
Solution Approach 1:
The patent merges the scheduling function to handle multiple carriers within a single DCI message. The frequency-domain resource indication information is designed to simultaneously indicate resources across multiple carriers by utilizing the relationship between the indicated carrier and the monitoring occasion, allowing one DCI to replace multiple separate DCIs that would otherwise be needed for each carrier individually.
Solution Approach 2:
The DCI structure is enhanced with multi-functional capability to serve multiple carriers. The frequency-domain resource indication field is designed to universally indicate resources not only for the indicated carrier but also for other carriers based on the monitoring occasion relationship, making the DCI a universal scheduling message that can handle diverse carrier scheduling scenarios.
2Quantity of substance
If multiple carriers are scheduled with one DCI, then the PDCCH overheads are reduced, but the frequency-domain resource indication becomes more complex
Solution Approach 1:
The frequency-domain resource indication is segmented into different functional parts: one part explicitly indicates a specific carrier, while another part indirectly indicates resources for other carriers through the monitoring occasion relationship. This segmentation allows the system to reduce overall PDCCH overhead while maintaining manageable complexity by dividing the indication task into simpler sub-tasks.
Solution Approach 2:
The monitoring occasion serves as an intermediary element that links the frequency-domain resource indication to multiple carriers. Instead of directly indicating resources for multiple carriers in a complex manner, the patent uses the monitoring occasion relationship as a mediator to imply resource allocation for additional carriers, simplifying the indication mechanism while achieving multi-carrier scheduling.
Data Source
AI summary
A resource determining method, a resource indication method, and a device are provided. The resource determining method is applied to a user-side device and includes: obtaining frequency-domain resource indication information of downlink control information DCI, where the frequency domain resource indication information supports scheduling of a plurality of carriers or bandwidth parts BWPs; and determining frequency-domain scheduling resources on the plurality of carriers or BWPs according to the frequency-domain resource indication information.