Uplink Control Information Multiplexing with Priority Selection
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Solution Overview
Problem
Existing communication systems face challenges in efficiently transmitting uplink control information (UCI) with different reliability conditions, particularly in higher frequency bands like 6 GHz and above, where issues like the exposed node and hidden node problems arise.
Innovation Solution
The proposed solution involves a method for a terminal in a communication system to select control elements from first UCI based on the size of the uplink resource, generate multiplexed UCIs by combining these selected control elements with second UCI, and transmit them to a base station using the uplink resource. This approach allows for the prioritization and efficient transmission of high-priority (HP) UCI and low-priority (LP) UCI by adjusting the size of the control elements and dropping unnecessary transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all control elements in first UCI are transmitted, then complete control information is provided to base station, but uplink resource size exceeds available capacity
Solution Approach 1:
The patent extracts and transmits only essential control elements from the first UCI based on uplink resource size constraints. When resources are limited, non-essential control elements are excluded from transmission, while essential elements are prioritized to maintain minimum functional requirements for system operation.
Solution Approach 2:
The patent segments control information into multiple priority levels or categories. Control elements are divided into essential and non-essential groups, allowing selective transmission based on available uplink resources. This segmentation enables flexible resource allocation while preserving critical control functions.
2Productivity
If multiplexing method is used to combine HP UCI and LP UCI, then resource utilization is improved, but transmission reliability of high-priority UCI may be compromised
Solution Approach 1:
The patent applies different quality levels or protection mechanisms to different parts of the multiplexed UCI. High-priority control elements receive enhanced protection or higher allocation weights within the multiplexed structure, ensuring their reliability is maintained even when shared with low-priority elements in the same resource block.
3Productivity
If control elements are selected based on uplink resource size, then resource constraints are satisfied, but some control information may be lost
Solution Approach 1:
The patent performs preliminary identification and classification of control elements before transmission. Essential control elements are pre-selected and marked for priority transmission, ensuring that even under resource constraints, the most critical information is preserved and transmitted first, minimizing functional impact of any information loss.
Data Source
AI summary
An operation method of a terminal in a communication system may include: selecting one or more control elements among a plurality of control elements included first UCI in consideration of a size of an uplink resource; generating multiplexed UCIs by multiplexing second UCI with the one or more control elements; and transmitting the multiplexed UCIs to a base station by using the uplink resource.