PUCCH Group Resource Removal in Carrier Aggregation
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Solution Overview
Problem
In carrier aggregation systems, there is a need for an efficient method to remove the last PUCCH resource of a PUCCH group, as existing methods do not effectively manage the deactivation of cells and resource reallocation, leading to suboptimal performance and resource utilization.
Innovation Solution
A method for a UE to configure a PUCCH group, deactivate all cells belonging to the group if the last PUCCH resource is released, and change them to another PUCCH group, while generating and transmitting HARQ feedback by multiplexing feedbacks from all cells, and receiving control signaling to release or change PUCCH resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the last PUCCH resource of a PUCCH group is released, then resource utilization is improved, but cell deactivation and resource reallocation complexity increases
Solution Approach 1:
The patent applies preliminary action by deactivating all cells in the PUCCH group before releasing the last PUCCH resource. This ensures that no cell remains in an inconsistent state during the resource release process, and prepares the system for subsequent resource reallocation. The UE receives indication information identifying the PUCCH group, then deactivates all cells in that group, and only after that releases the PUCCH resource, ensuring proper sequencing of operations.
Solution Approach 2:
The patent implements dynamics by making the PUCCH group configuration flexible and reconfigurable. When the last PUCCH resource is released, the entire PUCCH group can be dynamically reconfigured and reallocated to different cells. This dynamic approach allows the system to adapt to changing network conditions and optimize resource utilization, rather than maintaining static PUCCH group assignments.
2Ease of operation
If all cells in a PUCCH group are deactivated when the last PUCCH resource is released, then resource management is improved, but system operation complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the network into multiple PUCCH groups, where each group contains specific cells with PUCCH resources. When the last PUCCH resource of a particular group is released, only that specific group is deactivated and reconfigured, rather than affecting the entire network. This segmented approach isolates the impact of resource release to specific groups, making resource management more controllable and less complex overall.
Solution Approach 2:
The patent implements feedback mechanisms where the UE receives indication information from the network about which PUCCH group contains the last PUCCH resource. Based on this feedback, the UE performs the appropriate deactivation and reallocation actions. This feedback-driven approach ensures that resource management decisions are based on accurate network state information, improving ease of operation while maintaining controlled complexity.
Data Source
Figure 1~2a
Figure 2b
Figure 3(a)~4
AI summary
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for removing a last PUCCH resource of a PUCCH group in a carrier aggregation system, the method comprising: configuring a first Physical Uplink Control Channel (PUCCH) group, wherein the first PUCCH group is composed of one or more first cells with PUCCH resource and zero or more second cells without PUCCH resource; and deactivating all cells belonging to the first PUCCH group, if a last PUCCH resource of the first PUCCH group is released.