UCI Bit Scope Allocation for Configured Grant Overhead Reduction
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Solution Overview
Problem
The challenge in wireless communication networks is the inefficiency in reducing uplink control information (UCI) bit overheads, particularly in configured grant (CG) transmission occasions, which are wasteful and not optimally utilized for XR services.
Innovation Solution
A method and apparatus that configure the application scope of first indication information to indicate used and unused CG transmission occasions, using DCI, MAC CE, or RRC signaling, and UCI, with flexible bit allocation based on time offsets and bitmaps to minimize overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UCI indicates all CG transmission occasions in the entire CG period, then complete resource tracking is achieved, but bit overheads increase significantly
Solution Approach 1:
The patent segments the CG transmission occasions into two distinct parts: a first part where the terminal indicates used/unused occasions, and a second part where the network schedules additional occasions. This segmentation allows the terminal to report only on the first part (reducing bit overheads) while the network maintains overall resource tracking by scheduling the second part based on terminal feedback.
Solution Approach 2:
The terminal performs partial indication by reporting only on a portion (first part) of the CG transmission occasions rather than the entire CG period. This partial action reduces the bit overheads significantly while still providing the network with sufficient information to optimize resource allocation through selective scheduling in the second part.
2Productivity
If CG transmission occasions are allocated for the entire CG period, then resource availability is maximized, but resource waste increases when not all occasions are used
Solution Approach 1:
The patent implements a feedback mechanism where the terminal sends UCI indicating which CG transmission occasions in the first part are used or unused. The network uses this feedback information to intelligently schedule CG transmission occasions in the second part, allocating resources dynamically based on actual terminal needs and thereby reducing resource waste from unused pre-allocated occasions.
Solution Approach 2:
The patent transforms the static resource allocation of pre-configured CG occasions into a dynamic system where the network adjusts the second part of CG occasions based on terminal feedback about the first part. This dynamic adjustment allows resource availability to match actual demand, maximizing productivity while minimizing waste from over-provisioning.
3Measurement precision
If the application scope of first indication information covers the entire CG period, then indication accuracy is maximized, but bit overheads increase
Solution Approach 1:
The patent divides the indication scope into two segments: the first part covered by the terminal's first indication information (UCI) and the second part managed by network scheduling. This segmentation maintains indication accuracy for the first part through explicit terminal feedback while avoiding the bit overhead penalty of indicating the entire CG period, as the second part is handled through separate network scheduling messages.
Data Source
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.