PUCCH Grouping for Wireless Device Control Channel Load Management
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Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing multiple physical uplink control channel (PUCCH) groups, leading to high PUCCH load on primary cells and potential bottlenecks in resource allocation and transmission.
Innovation Solution
The implementation of multiple PUCCH groups, where cells are grouped to distribute PUCCH resources across both primary and secondary cells, allowing for simultaneous PUCCH and PUSCH transmissions on both types of cells, thereby offloading PUCCH resources from primary cells and enhancing capacity and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If PUCCH resources are concentrated on primary cells, then control signaling is simplified, but PUCCH load on primary cells increases causing resource allocation bottlenecks
Solution Approach 1:
The patent divides PUCCH resources into multiple groups (first PUCCH group and second PUCCH group) that can be distributed across different cells. This segmentation allows control signaling to be split between primary and secondary cells, reducing the load on primary cells while maintaining structured control signaling through defined group configurations and associations with cell groups.
2Productivity
If multiple PUCCH groups are implemented across multiple cells, then resource utilization improves, but device complexity increases
Solution Approach 1:
The patent creates PUCCH groups that can function across multiple cells with different roles. The first PUCCH group is associated with a first cell group and the second PUCCH group with a second cell group, allowing the same PUCCH resource structure to serve multiple purposes and multiple cells, thereby improving resource utilization without proportionally increasing complexity.
Solution Approach 2:
The patent introduces PUCCH group configurations as intermediary structures that mediate between individual cells and PUCCH resources. These group configurations act as intermediaries that simplify management by organizing PUCCH resources at the group level rather than requiring individual management for each cell, thus improving resource utilization while controlling complexity.
3Device complexity
If PUCCH load is concentrated on primary cells, then configuration is simpler, but network capacity is limited
Solution Approach 1:
The patent segments PUCCH resources into multiple groups that can be distributed across different cells, including both primary and secondary cells. This segmentation enables the network to utilize resources across multiple cells simultaneously, increasing overall network capacity while maintaining relatively simple configuration through standardized group structures and associations.
Solution Approach 2:
The patent extends PUCCH resource allocation from a single-cell (primary cell only) dimension to a multi-cell dimension by introducing PUCCH groups associated with different cell groups. This dimensional expansion allows control signaling to be distributed across multiple cells, thereby increasing network capacity while configuration remains manageable through the structured group association approach.
Data Source
AI summary
A plurality of physical uplink control channel (PUCCH) groups comprise a primary PUCCH group comprising a primary cell and a secondary PUCCH group comprising a PUCCH secondary cell. The wireless device deactivates the PUCCH secondary cell after a deactivation condition for the PUCCH secondary cell is met. The wireless device stops transmission of channel state information for a first secondary cell in the secondary PUCCH group after deactivation of the PUCCH secondary cell. The wireless device stops transmission of positive acknowledgement and negative acknowledgement on the PUCCH secondary cell after deactivation of the PUCCH secondary cell.