Secondary Timing Advance Group PUCCH Resource 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 resource bottlenecks, especially as the number of aggregated carriers and PUCCH payloads increase.
Innovation Solution
The implementation of multiple PUCCH groups, where cells are grouped to distribute PUCCH resources across secondary cells, reducing the load on primary cells and enabling simultaneous PUCCH/PUSCH transmission on both primary and secondary cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PUCCH groups are implemented to distribute PUCCH resources, then the PUCCH load on primary cells is reduced, but the device complexity increases due to multiple timing advance groups and configuration management
Solution Approach 1:
The patent divides the uplink control channel resources into multiple PUCCH groups, where each group is associated with a specific timing advance group (TAG). This segmentation allows the system to handle multiple carriers and cells by distributing PUCCH resources across different groups rather than consolidating them on a single primary cell, thereby increasing overall PUCCH resource capacity while managing complexity through structured organization.
Solution Approach 2:
The patent introduces timing advance groups (TAGs) as intermediary structures that mediate between the multiple carriers/cells and the PUCCH resources. Each TAG acts as a mediator that manages timing alignment and resource allocation for its associated carriers, simplifying the configuration management by providing a hierarchical structure (PUCCH group -> TAG -> carriers) rather than direct flat management.
2Productivity
If the number of aggregated carriers increases to enhance network capacity, then the PUCCH payload size increases, but the resource bottlenecks on primary cells worsen
Solution Approach 1:
The patent segments the PUCCH resources by associating different carriers with different timing advance groups, which are in turn associated with different PUCCH groups. This segmentation allows the system to aggregate multiple carriers for enhanced network capacity while distributing their PUCCH payloads across multiple resources rather than concentrating them on a single primary cell, thereby eliminating the resource bottleneck.
Solution Approach 2:
The patent introduces a new dimensional organization by mapping carriers not just to a single primary cell but to multiple PUCCH groups through timing advance group associations. This dimensional change from one-to-one mapping to one-to-many mapping enables the system to scale network capacity while avoiding the bottleneck by utilizing additional resource dimensions.
Data Source
AI summary
A wireless device receives configuration parameters of cells grouped into physical uplink control channel (PUCCH) groups. The PUCCH groups comprise a secondary PUCCH group. The secondary PUCCH group comprises: a PUCCH secondary cell, with a secondary PUCCH, of a secondary timing advance group (TAG); and a first secondary cell. In response to a time alignment timer of the secondary TAG expiring or stopping the wireless device: stops transmission of acknowledgements for packets of the first secondary cell; stops reception of downlink shared channel packets via the first secondary cell; and continues reception of downlink multicast channel packets via the first secondary cell.