Uplink Control Information Size Modification for Coding Rate Compliance
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Solution Overview
Problem
In wireless communication systems, transmitting uplink control information (UCI) over physical uplink shared channel (PUSCH) resources introduces complexity due to varying coding rates and resource allocations, making it difficult to determine how to modify UCI messages to satisfy coding rate thresholds.
Innovation Solution
A method where a user equipment (UE) identifies a coding rate threshold and modifies the size of the UCI message by dropping portions based on dropping rules, which can be signaled or calculated using assumptions about PUCCH resources, actual resource allocations, or separate reference resources, to ensure compliance with the coding rate threshold during transmission over PUSCH resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transmits UCI with a large payload over PUSCH resources, then the coding rate requirement may be satisfied, but it introduces complexities associated with determining maximum coding rates, resource element allocation, and message modification
Solution Approach 1:
The UE performs preliminary determination of the coding rate based on the size of uplink control resources and the size of uplink shared resources before actual transmission. This preliminary calculation allows the UE to proactively adjust the UCI message size to satisfy coding rate requirements, avoiding complex real-time adjustments during transmission
Solution Approach 2:
The UE dynamically adjusts the size of the UCI message based on the determined coding rate and resource allocations. By making the message size adaptable rather than fixed, the system can satisfy coding rate requirements while managing transmission complexity through automated size adjustment
2Productivity
If the UE determines the coding rate based on actual PUSCH resource allocation, then transmission efficiency is improved, but the complexity of determining resource element allocation increases
Solution Approach 1:
The UE autonomously determines the coding rate and adjusts the UCI message size based on the allocated PUSCH resources without requiring complex external coordination. The UE uses the size of uplink control resources and size of uplink shared resources as inputs to self-determine the appropriate coding rate and message configuration
Solution Approach 2:
The system changes the coding rate parameter based on the actual resource allocation. By making the coding rate a variable parameter rather than a fixed value, the system can optimize transmission efficiency for different resource allocations while using standardized calculation methods to manage complexity
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may identify a coding rate threshold associated with transmitting an uplink control information (UCI) message during a time period, determine whether to reduce a size of the UCI message based on the coding rate threshold, and transmit at least a portion of the UCI message on uplink shared resources allocated for the time period. The UE may determine to reduce the size of the UCI message by dropping portions of the UCI message based on a size of uplink control resources, a size of uplink shared resources, additional parameters signaled to the UE, or some combination of these factors.