Cross-Carrier DCI Scheduling With Shared and Carrier-Specific Fields
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Solution Overview
Problem
Existing wireless communication systems, such as 5G New Radio (NR), lack the capability to simultaneously schedule multiple carriers using a single Physical Downlink Control Channel (PDCCH), leading to inefficiencies and increased hardware complexity.
Innovation Solution
Implement a method where a single Downlink Control Information (DCI) can schedule multiple carriers, reducing payload size and simplifying the implementation process while ensuring schedule flexibility and reducing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single PDCCH schedules multiple carriers simultaneously, then system performance and efficiency are improved, but the DCI payload size and signaling overhead increase
Solution Approach 1:
The patent segments the DCI structure by introducing separate field types: a first DCI field for scheduling parameters common to all carriers, and second DCI fields for carrier-specific parameters. This segmentation allows efficient multi-carrier scheduling while controlling payload size by avoiding redundancy.
Solution Approach 2:
The patent creates a universal DCI format that can schedule multiple carriers simultaneously. The first DCI field serves multiple carriers with common scheduling parameters, while carrier-specific fields provide individualized parameters. This multi-functional DCI structure improves scheduling efficiency without proportionally increasing payload size.
2Device complexity
If a single PDCCH schedules multiple carriers, then implementation complexity is reduced, but the system requires enhanced multi-carrier coordination capabilities
Solution Approach 1:
The patent introduces dynamic parameter fields in the DCI that can be configured based on the number and type of carriers being scheduled. The DCI structure dynamically adapts its content based on scheduling requirements, providing enhanced multi-carrier coordination capabilities while maintaining implementation simplicity through standardized dynamic configuration.
3Productivity
If cross-carrier scheduling is supported on the same PDCCH, then resource utilization is improved, but the signaling overhead and processing requirements increase
Solution Approach 1:
The patent merges scheduling information for multiple carriers into a single DCI message. By combining common scheduling parameters in the first DCI field and carrier-specific parameters in second DCI fields, the patent achieves improved resource utilization through unified scheduling while minimizing signaling overhead through consolidated information transmission.
Data Source
AI summary
A user equipment (UE) is configured for wireless communication. The UE comprises a receiver configured to receive radio resource control (RRC) signaling information. The RRC signaling information comprises configuration information for a target cell of a set of cells. The receiver is further configured to receive a downlink control information (DCI). Whether the DCI comprises target domain information for the target cell is based on a number of cells in the set of cells. The receiver is further configured to receive information from at least one cell included in the set of cells, based on the DCI. The DCI comprises the target domain information on a condition that the number of cells in the set of cells is one and the configuration information of the RRC signaling information indicates that the DCI comprises the target domain information.