Uplink Control Channel Segmentation for Implementation Burden
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Solution Overview
Problem
Future radio communication systems face increased implementation burdens due to the need to support various uplink control channel formats, including shorter and longer durations than existing LTE systems, which complicates the design of user terminals and radio base stations.
Innovation Solution
A user terminal is designed to transmit uplink control information using a control channel composed of multiple units, where each unit is a shorter duration subchannel, allowing for flexible formatting of both short and long PUCCH channels by combining multiple short PUCCH units, thereby simplifying the implementation and improving the robustness of uplink control channel transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If various UL control channel formats (short PUCCH and long PUCCH) are supported in future radio communication systems, then the adaptability and versatility of the system is improved, but the device complexity and implementation burden increase
Solution Approach 1:
The patent segments the long PUCCH into multiple short PUCCH units in the time domain. Each short PUCCH unit has a standardized format with fixed duration, and multiple units are concatenated to form long PUCCH. This segmentation allows the system to support both short and long PUCCH formats using a unified short PUCCH building block, thereby improving adaptability while reducing implementation complexity through code reusability.
2Adaptability or versatility
If multiple UL control channel formats are implemented, then the system can accommodate diverse communication requirements, but the ease of manufacture and implementation is reduced
Solution Approach 1:
The patent creates a universal short PUCCH format that serves as a building block for both short PUCCH transmission and long PUCCH construction. The same short PUCCH unit structure, processing logic, and resource allocation mechanisms are reused across different PUCCH durations, making the implementation easier while maintaining format flexibility.
3Stability of the object's composition
If existing LTE PUCCH formats are used with one-ms subframe duration, then the system maintains compatibility with legacy systems, but the system cannot support future requirements for shorter or longer control channel durations
Solution Approach 1:
By segmenting long PUCCH into multiple short PUCCH units, the patent enables flexible duration adaptation. The short PUCCH unit can be configured with different durations (shorter than 1ms), and multiple units can be concatenated to achieve various total durations including longer than 1ms. This maintains compatibility with existing LTE one-ms subframe structures while enabling support for future short and long PUCCH requirements.
Solution Approach 2:
The patent introduces dynamic configurability where the number of short PUCCH units, their duration, and concatenation patterns can be adjusted based on communication requirements. This dynamic approach allows the system to adapt between short and long PUCCH formats while maintaining a stable underlying short PUCCH unit structure, bridging legacy compatibility with future flexibility.
Data Source
AI summary
The present invention is designed to support various UL control channels while reducing the burden of implementation. According to the present invention, a user terminal has a transmission section that transmits uplink control information (UCI) using an uplink (UL) control channel having a first duration, and a control section that controls the transmission of the UCI. The UL control channel of the first duration is constituted by a plurality of units, and each of the plurality of units is constituted by a UL control channel having a second duration that is shorter than the first duration.