Extended Carrier Aggregation via Dual PUCCH Segmentation
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Solution Overview
Problem
LTE Rel. 10/11/12 limits the maximum number of component carriers that can be allocated to each user terminal to five, restricting flexible and high-speed wireless communication, and extended carrier aggregation requires PUCCH extension and MAC system changes.
Innovation Solution
The solution enables extended carrier aggregation by utilizing dual-PUCCHs and bundling ACK/NACK bits, allowing up to 20 component carriers without PUCCH extension or MAC system changes, and includes methods for efficient resource management and power consumption reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of component carriers is increased beyond five, then the peak communication data rate is improved, but the device complexity and system configuration complexity increase due to requiring PUCCH extension and MAC system changes
Solution Approach 1:
The patent segments the component carriers into multiple groups, with each group associated with a separate PUCCH resource. This allows the system to handle more than five component carriers by dividing them into manageable segments, each with its own acknowledgment feedback mechanism, thereby increasing peak data rate without requiring complete PUCCH extension
Solution Approach 2:
The patent introduces a new dimension for managing component carriers by associating multiple PUCCH resources with different component carrier groups. This dimensional approach allows the system to scale beyond the traditional five-carrier limit by adding PUCCH resource dimensions rather than extending the existing single-PUCCH structure
2Adaptability or versatility
If extended carrier aggregation is implemented to allocate at least six component carriers, then wireless communication flexibility and speed are improved, but the ease of operation deteriorates due to requiring PUCCH extension and MAC system changes
Solution Approach 1:
By segmenting component carriers into groups and assigning separate PUCCH resources to each group, the patent maintains operational simplicity for each segment while achieving extended carrier aggregation capabilities. This segmentation allows the system to operate with six or more carriers without requiring complex PUCCH extension or MAC system changes
Solution Approach 2:
The patent creates a universal framework where multiple PUCCH resources can be used for acknowledgment feedback across different component carrier groups. This multi-functional approach allows the same PUCCH mechanism to serve multiple carriers simultaneously, maintaining ease of operation while achieving extended carrier aggregation
3Productivity
If more component carriers are allocated to each user terminal, then the communication throughput is improved, but the power consumption increases due to increased resource allocation and control overhead
Solution Approach 1:
The patent segments component carriers into groups with separate PUCCH resources, allowing the user terminal to manage and activate only the necessary segments. This segmentation enables the terminal to maintain high throughput by using multiple carriers while reducing power consumption by selectively activating only the required carrier groups based on traffic demands
Solution Approach 2:
The patent enables dynamic configuration of PUCCH resources for different component carrier groups. The user terminal can dynamically activate or deactivate specific PUCCH resources and their associated carrier groups based on current communication needs, thereby optimizing the balance between throughput and power consumption in real-time
Data Source
Figure 1A~1C
Figure 2
Figure 3A~3B
AI summary
An object is to enable proper operation of extended carrier aggregation that can allocate at least six component carriers to each user terminal. Provided is a user terminal that communicates with a radio base station that configures a plurality of cell groups each of which including one or more cells. The user terminal includes: a control unit that controls six or more component carriers configured by the radio base station; and a transmitting/receiving unit that receives information on a plurality of component carriers configured by the radio base station and feedbacks ACK/NACK information to one of the component carriers in each cell group.