Uplink Control Information Mapping in Wireless PUSCH
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Solution Overview
Problem
In wireless mobile communication systems, the conventional method for multiplexing data and control sequences leads to unbalanced control information mapping, resulting in degraded transmission performance due to varying error rates and inability to satisfy the capability conditions of different control information types, especially in high-speed mobile environments.
Innovation Solution
A method is introduced to map control information by a prescribed rule, considering the presence and types of control information, where the first control information is mapped in units of resource elements adjacent to reference signals, and the second control information is mapped adjacent to resource elements allocated for reference signals, ensuring even distribution and avoiding overwrite of reference signal resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control information is mapped using conventional methods, then data transmission is performed, but control information mapping becomes unbalanced leading to varying error rates and degraded transmission performance
Solution Approach 1:
The patent applies local quality by mapping different types of control information to different locations within the resource block. Specifically, first control information is mapped starting from the first row downward, while second control information is mapped adjacent to reference signal resource elements. This localized differentiation ensures that control information is distributed uniformly across the resource block, preventing concentration in specific areas and thereby equalizing error rates across all code blocks, which directly improves transmission reliability.
2Ease of manufacture
If control information is mapped without considering reference signal locations, then mapping is simplified, but reference signal resources may be overwritten leading to loss of information
Solution Approach 1:
The patent segments the resource block into distinct mapping regions based on reference signal locations. The resource elements are divided into those allocated for reference signals and those available for control information mapping. By segmenting the mapping process into separate steps—first mapping control information in units of resource elements, then mapping additional control information adjacent to reference signals while avoiding overwrite—the patent maintains process simplicity while ensuring reference signal integrity is preserved.
3Productivity
If control information is concentrated in specific resource elements, then mapping efficiency increases, but error rates vary across code blocks reducing overall system performance
Solution Approach 1:
The patent transitions from one-dimensional sequential mapping to two-dimensional distributed mapping across the resource block matrix. By mapping control information across both rows and columns in a distributed manner—first control information from the first row downward, second control information adjacent to reference signals—the patent achieves uniform distribution without sacrificing mapping efficiency. This dimensional approach ensures all code blocks experience similar error rates, improving overall system reliability while maintaining productivity.
Data Source
AI summary
A method of transmitting uplink signal through a Physical Uplink Shared Channel (PUSCH) by a mobile device in a wireless communication system. The method includes generating multiplexed information by multiplexing a first type of control information and data information; and transmitting the multiplexed information and a second type of control information through the PUSCH. One or more Resource Blocks (RBs) for the PUSCH include N Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols in a slot. The multiplexed information is mapped on a first set of SC-FDMA symbols, and the first set of SC-FDMA symbols includes SC-FDMA symbols other than an (N−3)th SC-FDMA symbol for a reference signal in the slot. The second type of control information is mapped on (N−4)th and (N−2)th SC-FDMA symbols in the slot, and the second type of control information includes Acknowledgement/Negative Acknowledgement (ACK/NACK) information.