Terminal Device PUCCH Format Allocation for Carrier Aggregation
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Solution Overview
Problem
Current radio communication systems lack an efficient method for transmitting uplink control information in LTE networks, particularly in scenarios involving multiple serving cells and secondary cells.
Innovation Solution
The implementation of specific PUCCH formats and resource allocation strategies in terminal and base station devices, allowing for efficient transmission of uplink control information by optimizing the use of PUCCH resources and formats across multiple serving cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If carrier aggregation is extended beyond five serving cells to increase network capacity, then the quantity of substance increases, but the device complexity increases and reliability decreases due to lack of standardized UCI transmission methods
Solution Approach 1:
The patent divides uplink control information into different types (ACK/NACK, CSI, SR) and assigns specific PUCCH formats to different information types. This segmentation allows standardized handling of each UCI type regardless of the total number of serving cells, managing complexity through structured classification.
Solution Approach 2:
The patent creates a universal PUCCH transmission framework that handles multiple UCI types (ACK/NACK, CSI, SR) and multiple serving cells using a unified set of rules and formats. This multi-functional approach allows the same PUCCH mechanisms to serve diverse purposes across any number of aggregated cells.
2Adaptability or versatility
If multiple PUCCH formats are used to accommodate different UCI types, then the adaptability increases, but the device complexity increases due to resource allocation management
Solution Approach 1:
The patent assigns specific PUCCH formats to specific UCI types based on their local requirements: PUCCH format 1a/1b for ACK/NACK, format 2 for CSI, and format 3 for multiple UCI types. This localized optimization allows each format to be tailored to its specific function while maintaining overall system simplicity through clear assignment rules.
Solution Approach 2:
The patent changes key parameters such as resource allocation indices, cyclic shifts, and orthogonal cover codes based on the UCI type and serving cell configuration. These parameter adjustments allow the system to adapt to different scenarios without requiring fundamentally different transmission mechanisms, maintaining versatility while controlling complexity.
Data Source
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Figure 3A~3C
AI summary
Aspects of the disclosure relate to a terminal device including a reception unit configured to receive a first set of information used for permitting simultaneous transmission of a CSI and a HARQ-ACK using PUCCH format (3), and receive a second set of information used for permitting simultaneous transmission of a CSI and a HARQ-ACK using PUCCH format (4). The terminal device may also include a transmission unit for transmitting a HARQ-ACK and/or a CSI. Based at least on whether the first set of information, the second set of information, and the HARQ-ACK correspond to a PDSCH transmission on a secondary cell with a cell index less than or equal to a first predetermined value or whether the HARQ-ACK corresponds to a PDSCH transmission on a secondary cell with a cell index greater than the first predetermined value, processing operations related to HARQ-ACK and/or CSI transmission may be executed.