UCI Bitmap Scope for Lower CG Transmission Bit Overhead
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of reducing uplink control information (UCI) bit overheads in configured grant (CG) transmission occasions is significant, particularly in extended reality (XR) services, leading to resource wastage and inefficiency.
Innovation Solution
A method and apparatus that configure the application scope of first indication information to indicate used and unused CG transmission occasions, utilizing DCI, MAC CE, or RRC signaling, and UCI to optimize bit usage, employing bitmaps to efficiently signal CG transmission status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If indication information covers all CG transmission occasions in the CG period, then resource utilization is improved, but bit overhead increases
Solution Approach 1:
The patent divides the CG period into multiple indication information fields, each covering a specific subset of CG transmission occasions. Instead of using one comprehensive indication field for all occasions, the indication is segmented into multiple smaller fields (e.g., first indication information for first period, second indication information for second period), reducing the bit overhead while maintaining complete coverage of all transmission occasions.
Solution Approach 2:
The patent introduces a time dimension by organizing indication information across multiple periods within the CG period. By structuring indication information in temporal segments (first period, second period, etc.), the system achieves comprehensive resource tracking without requiring a single large-bit indication field, thus reducing overall bit overhead.
2Quantity of substance
If indication information covers only a part of CG transmission occasions, then bit overhead is reduced, but resource waste increases
Solution Approach 1:
The patent segments the CG period into multiple indication information fields, where each field covers a specific subset of transmission occasions. This segmentation ensures that all occasions are covered (avoiding resource waste) while each individual indication field remains compact (reducing bit overhead).
Solution Approach 2:
The patent creates a universal indication mechanism that can adaptively cover different subsets of CG transmission occasions through multiple indication fields. Each field serves a specific time period but collectively they provide comprehensive coverage, making the system both efficient in bit usage and complete in resource tracking.
3Device complexity
If the application scope of indication information is fixed, then system complexity is reduced, but adaptability to different service requirements deteriorates
Solution Approach 1:
The patent implements dynamic indication information fields where the application scope (time period coverage) can be flexibly configured based on service requirements. The network can dynamically adjust which CG transmission occasions are covered by each indication field, enabling adaptation to different service patterns while maintaining manageable system complexity through standardized field structures.
Solution Approach 2:
The patent allows configuration parameters (such as time offset, period duration) to be adjusted to change the application scope of indication information. By modifying these parameters, the system can adapt to different service requirements (e.g., XR services with specific periodicity) without changing the fundamental indication mechanism, thus maintaining low complexity while achieving high adaptability.
Data Source
Figure 1~3
Figure 4~8
Figure 9
AI summary
A UCI bit design method is provided. An application scope of a UCI bit is configured to be a part of CG transmission occasions in a CG period by using configuration information, and the UCI bit indicates a used CG transmission occasion and/or an unused CG transmission occasion in the part of CG transmission occasions, thereby reducing bit overheads of UCI.