PUCCH Group Segmentation for Carrier Aggregation Load
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Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing physical uplink control channel (PUCCH) resources, particularly as the number of carriers and PUCCH payloads increase, leading to high PUCCH loads on primary cells, which can result in resource bottlenecks and reduced network performance.
Innovation Solution
The implementation of multiple PUCCH groups, where cells are grouped to distribute PUCCH resources across secondary cells, offloading the load from primary cells and enabling simultaneous PUCCH and PUSCH transmissions on both primary and secondary cells, thereby optimizing resource utilization and improving network capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple carriers are aggregated to increase network capacity, then the network capacity is improved, but the PUCCH load on primary cells increases causing resource bottlenecks
Solution Approach 1:
The patent segments the PUCCH resources by introducing multiple PUCCH groups, where PUCCH group 0 and PUCCH group 1 are independently configured. This segmentation distributes the PUCCH load from a single primary cell across multiple secondary cells, preventing resource bottlenecks while maintaining high network capacity through carrier aggregation.
2Device complexity
If PUCCH resources are concentrated on primary cells to simplify control, then the control structure is simplified, but resource bottlenecks and reduced network performance occur
Solution Approach 1:
The control structure is segmented into multiple PUCCH groups with independent configurations. While this increases structural complexity compared to a single PUCCH group, it distributes the control load across multiple secondary cells, thereby improving network performance by eliminating resource bottlenecks on primary cells.
Solution Approach 2:
The patent introduces a new dimension of PUCCH group indexing (group 0 and group 1) to organize PUCCH resources. This dimensional organization allows simultaneous PUCCH transmissions on different secondary cells, transforming the single-point control bottleneck into a distributed multi-point control structure that improves overall network performance.
3Adaptability or versatility
If PUCCH payloads are increased to support more carriers, then carrier aggregation capability is improved, but PUCCH resource bottlenecks on primary cells worsen
Solution Approach 1:
PUCCH resources are segmented into multiple groups that can be independently configured on different secondary cells. This allows the system to support more carriers through carrier aggregation while distributing the PUCCH payload requirements across multiple cells, preventing resource bottlenecks on any single primary cell.
Data Source
AI summary
A base station transmits parameters of cells grouped into control channel groups comprising: a primary control channel group; and a secondary control channel group. The secondary control channel group comprises: a control channel secondary cell with a secondary control channel; and a secondary cell. A radio link issue with the control channel secondary cell of a wireless device is detected. At least one command to deactivate the secondary cell for the wireless device is transmitted in response to the radio link issue.