DC Carrier Location Reporting for Active BWPs in Carrier Aggregation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the context of Carrier Aggregation (CA) scenarios in 5G New Radio (NR) systems, the reporting of Direct Current (DC) carrier location information is inadequate, particularly when multiple Component Carriers (CCs) are involved, leading to inefficiencies in network demodulation due to unnecessary noise and power consumption issues.
Innovation Solution
A method and device for reporting DC carrier location that considers only active serving cells and their active Bandwidth Parts (BWPs) in CA scenarios, using specific trigger modes and reporting mechanisms via MAC CE or RRC signaling to accurately convey DC carrier information, thereby optimizing power usage and network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If DC carrier location is reported for each BWP on each cell in CA scenario, then complete DC carrier information is provided, but reporting complexity and power consumption increase
Solution Approach 1:
The patent segments the DC carrier location reporting by separating active BWPs from dormant BWPs. Only active BWPs require DC carrier location reporting, while dormant BWPs are excluded from reporting requirements. This segmentation reduces the overall reporting burden while maintaining necessary information for active transmissions.
Solution Approach 2:
The patent implements dynamic reporting based on BWP activation state. The reporting requirement adapts to the current operational state of BWPs - when a BWP is activated, DC carrier location reporting is required; when dormant, reporting is suspended. This dynamic approach optimizes reporting complexity according to actual network conditions.
2Loss of information
If DC carrier location is reported for all cells including dormant ones, then comprehensive network information is available, but power consumption increases
Solution Approach 1:
The patent extracts and excludes dormant BWPs from the DC carrier location reporting process. By taking out the dormant BWP reporting requirement, the system reduces unnecessary power consumption while retaining reporting for active BWPs that actually contribute to current data transmission and reception operations.
Solution Approach 2:
The patent applies partial action by reporting DC carrier location only for active BWPs rather than all configured BWPs. This partial reporting approach provides sufficient information for current operational needs without the excessive power consumption of reporting for all BWPs including dormant ones.
3Measurement precision
If DC carrier location reporting is implemented for multiple CCs in CA scenario, then accurate demodulation is achieved, but network overhead increases
Solution Approach 1:
The patent applies local quality by differentiating reporting requirements based on BWP state. Active BWPs receive full DC carrier location reporting to ensure accurate demodulation, while dormant BWPs are excluded from reporting. This localized quality approach ensures precision where needed while reducing overall overhead.
Data Source
AI summary
A method for reporting a Direct Current (DC) carrier location includes: a terminal device reports at least one piece of DC carrier location information, where each of the at least one piece of DC carrier location information is associated with N cells and N bandwidth parts (BWPs), and N is a positive integer. The N cells are N severing cells in an active state among M severing cells, the N BWPs are N active BWPs of the N cells, and the active BWPs are not dormant BWPs; and M is a positive integer greater than or equal to N.