Secondary Cell Activation With Multiple PUCCH Groups
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Solution Overview
Problem
Existing LTE technologies face challenges in efficiently managing multiple PUCCH transmissions across multiple cells, leading to high load on the primary cell and limited flexibility in resource allocation.
Innovation Solution
The implementation of multiple PUCCH groups, including a primary and secondary PUCCH group, allows for distributing PUCCH transmissions across both the primary cell and secondary cells, reducing the load on the primary cell and enhancing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If all PUCCH transmissions are concentrated on the primary cell, then the control signaling is centralized and simple to manage, but the load on the primary cell becomes excessively high and resource allocation flexibility is limited
Solution Approach 1:
The patent divides the PUCCH transmission resources into multiple groups (first PUCCH group and second PUCCH group), with each group associated with different cell groups (first cell group and second cell group). This segmentation distributes the control signaling load across multiple cells rather than concentrating it on the primary cell, thereby improving network efficiency while maintaining manageable complexity through structured organization.
2Productivity
If PUCCH resources are distributed across multiple cells, then the load on the primary cell is reduced and resource allocation flexibility is improved, but the complexity of managing multiple PUCCH groups increases
Solution Approach 1:
The patent establishes that cells within the same cell group share common PUCCH resources and follow unified management rules. This multi-functionality approach allows the same resource management mechanisms to apply across different cell groups, reducing the overall complexity of managing distributed PUCCH resources while maintaining the benefits of load distribution and flexibility.
3Adaptability or versatility
If multiple PUCCH groups are implemented, then resource allocation flexibility is enhanced, but the configuration and management overhead increases
Solution Approach 1:
The patent enables dynamic association between cell groups and PUCCH groups, allowing the network to flexibly configure and reconfigure these relationships based on traffic conditions and resource availability. This dynamic approach enhances resource allocation flexibility while managing configuration overhead through adaptive rather than static assignments.
Data Source
AI summary
A base station transmits, to a wireless device, configuration parameters of cells grouped into physical uplink control channel (PUCCH) groups comprising a primary PUCCH group comprising a primary cell, and a secondary PUCCH group comprising a PUCCH secondary cell with a secondary PUCCH. The base station transmits, during a first time interval, a first indication to activate a secondary cell of the primary PUCCH group and the PUCCH secondary cell. The base station starts reception of channel state information of the secondary cell from a second time interval that is a pre-determined number of time intervals after the first time interval. The base station starts reception of channel state information for the PUCCH secondary cell from a third time interval that is a number of time intervals after the first time interval.