Uplink Control Information Distribution Across Component Carriers
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Solution Overview
Problem
In wireless communication systems, extending bandwidth through carrier aggregation leads to performance degradation of control information due to puncturing and uneven distribution of control data, causing decoding errors and reduced communication capacity.
Innovation Solution
A method for transmitting uplink control information by distributing Channel Quality Information, Precoding Matrix Index, ACK/NACK, and Rank Indication across multiple uplink component carriers, ensuring equal or unequal distribution, and encoding control information separately or jointly, while interlacing or mapping data blocks diagonally to maintain coding rate uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bandwidth is extended through carrier aggregation, then communication capacity is improved, but control information performance degrades due to puncturing and uneven distribution
Solution Approach 1:
The patent segments the control information transmission across multiple uplink component carriers instead of concentrating it on a single carrier. Each uplink component carrier transmits control information corresponding to specific downlink component carriers, distributing the control data to avoid puncturing effects and maintain decoding reliability while supporting extended bandwidth.
Solution Approach 2:
The patent applies different mapping strategies for different types of control information (CQI, ACK/NACK, RI) on different uplink component carriers. CQI information is mapped to specific resource elements, while ACK/NACK and RI are mapped to other resource elements, ensuring each control information type receives optimal transmission conditions tailored to its specific requirements.
2Productivity
If control information is multiplexed with data, then spectral efficiency is improved, but control information decoding accuracy deteriorates due to puncturing
Solution Approach 1:
The patent segments the uplink resource into different component carriers, with each carrier dedicated to transmitting control information for specific downlink carriers. This segmentation allows control information to be transmitted without puncturing by separate data streams, as each uplink carrier handles only its designated control information portion.
Solution Approach 2:
The patent introduces uplink component carriers as intermediary transmission channels between the base station and mobile station. These intermediary carriers provide dedicated pathways for control information, isolating it from data transmission interference and ensuring accurate decoding while still enabling efficient spectral utilization across the aggregated carrier system.
3Ease of operation
If control information is concentrated on specific carriers, then transmission simplicity is improved, but communication capacity is reduced due to uneven distribution
Solution Approach 1:
The patent segments the control information transmission across multiple uplink component carriers in a systematic manner. Each uplink carrier is assigned to transmit control information for specific downlink carriers, creating an organized distribution pattern that maintains simplicity through rule-based allocation while maximizing communication capacity through parallel transmission across multiple carriers.
Solution Approach 2:
The patent transitions from concentrating control information on a single carrier (one-dimensional approach) to distributing it across multiple uplink component carriers (multi-dimensional approach). This dimensional expansion allows simultaneous transmission of control information for multiple downlink carriers, increasing communication capacity while maintaining operational simplicity through structured carrier mapping.
Data Source
AI summary
A method for transmitting uplink control information in a wireless communication system is disclosed. The method includes receiving one or more downlink component carriers among N downlink component carriers created by dividing a multi-carrier by an integer N, and transmitting control information about the received one or more downlink component carriers in one or more uplink component carriers among N uplink component carriers created by dividing a multi-carrier by the integer N, wherein the control information about the received one or more downlink component carriers is distributed equally or unequally to the one or more uplink component carriers and the control information includes at least one of a Channel Quality Information/Precoding Matrix Index (CQI/PMI), an ACKnowledgment/Negative ACKnowledgment (ACK/NACK), and a Rank Indication (RI).