Uplink Control Information Transmission Using Reed-Muller Coding
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Solution Overview
Problem
In wireless communication systems, particularly in LTE, the transmission of uplink control information such as HARQ-ACK/NACK and RI faces challenges due to the Peak-to-Average Ratio (PAPR) disadvantage and the need for efficient channel coding and resource allocation to maintain performance across varying channel conditions.
Innovation Solution
The method employs Reed-Muller (RM) coding for dividing information data into first and second data sets, allocating resource elements accordingly, and performing rate matching to ensure efficient transmission of concatenated data, specifically configuring resource elements to maintain performance even in multiple carrier environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Reed-Muller coding is applied to uplink control information, then channel coding performance is improved, but device complexity increases
Solution Approach 1:
The patent segments the uplink control information into multiple code blocks, each independently encoded with Reed-Muller coding. This segmentation allows the complex coding operation to be divided into manageable units, improving reliability through redundancy while keeping the complexity of individual encoding operations acceptable.
Solution Approach 2:
The patent dynamically adjusts coding parameters including the number of code blocks, code block size, and resource element allocation based on channel conditions and control information type. This parameter adaptation optimizes the balance between coding performance and processing complexity for different transmission scenarios.
2Productivity
If resource elements are allocated for uplink control information, then transmission efficiency is improved, but PAPR increases
Solution Approach 1:
The patent segments the resource element allocation by separating control information transmission from data transmission in the time-frequency grid. Control information is mapped to dedicated resource elements, allowing efficient utilization while maintaining low PAPR through independent encoding and mapping of control signals.
Solution Approach 2:
The patent introduces channel coding as an intermediary process that transforms the control information before resource element mapping. This intermediate coding step enables efficient use of resource elements while the structured mapping approach maintains low PAPR by avoiding concentrated energy in specific time-frequency slots.
3Productivity
If control information is transmitted in multiple carriers, then system capacity is improved, but performance degradation occurs
Solution Approach 1:
The patent segments the control information transmission across multiple carriers by dividing the control payload into code blocks that can be distributed across different component carriers. This segmentation enables the system to achieve higher capacity through carrier aggregation while maintaining transmission performance through balanced resource allocation across carriers.
Solution Approach 2:
The patent dynamically adjusts the number of code blocks and their distribution across carriers based on the total number of available resource elements and channel conditions. This parameter adaptation ensures optimal performance by preventing any single carrier from becoming a bottleneck while maximizing overall system capacity.
4Productivity
If rate matching is performed on coded data, then resource allocation efficiency is improved, but information loss may occur
Solution Approach 1:
The patent segments the coded data into multiple code blocks with independent rate matching applied to each block. This segmentation allows flexible resource allocation where each block can be independently adjusted to match available resources, improving allocation efficiency while maintaining complete information through systematic puncturing patterns that preserve data integrity.
Solution Approach 2:
The patent performs rate matching by systematically puncturing coded bits in a predetermined pattern before transmission. This preliminary action of structured bit removal optimizes resource utilization by matching the coded data length to available resource elements, while the systematic nature of the puncturing ensures that information loss is minimized and can be reliably recovered at the receiver.
Data Source
AI summary
A method for transmitting information data by using a Reed-Muller coding scheme in a wireless communication system is disclosed. The method includes the steps of dividing the information data to first information data and second information data if a bit size O of the information data is equal to or larger than a predetermined number; applying RM coding on each of the first information data and the second information data; concatenating the coded first information data and the coded second information data, and transmitting the concatenated data.