PUCCH Secondary Cell Power Control in Carrier Aggregation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing physical uplink control channel (PUCCH) resources, particularly in scenarios with multiple carriers and dual connectivity, leading to high PUCCH load on primary cells and limited flexibility in resource allocation.
Innovation Solution
The implementation of multiple PUCCH groups, where cells are grouped to share PUCCH resources across primary and secondary cells, allowing for dynamic allocation and offloading of PUCCH traffic from primary cells to secondary cells, thereby reducing the load and enhancing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PUCCH resources are concentrated on primary cells, then control channel reliability is improved, but device complexity and resource allocation flexibility deteriorate
Solution Approach 1:
The patent divides PUCCH resources into multiple groups (first PUCCH group and second PUCCH group) that can be independently configured and managed. Each group can be associated with different component carriers, allowing the system to segment the control channel resources across multiple cells rather than concentrating them on a single primary cell. This segmentation maintains reliability through distributed resources while improving flexibility in resource allocation.
Solution Approach 2:
The patent introduces a new dimension to PUCCH resource management by enabling PUCCH transmission on secondary cells in addition to primary cells. This dimensional expansion from single-cell to multi-cell PUCCH transmission allows the system to distribute control channel loads across multiple spatial dimensions (different cells), thereby reducing the burden on primary cells while maintaining overall reliability and enhancing allocation flexibility.
2Reliability
If PUCCH resources are concentrated on primary cells, then control channel reliability is improved, but network capacity deteriorates
Solution Approach 1:
By segmenting PUCCH resources across multiple cells through group-based configuration, the patent distributes the control channel load, preventing any single cell from becoming a bottleneck. This segmentation allows more cells to participate in PUCCH transmission, thereby increasing overall network capacity while maintaining reliability through redundant paths.
Solution Approach 2:
The patent merges PUCCH transmission capabilities across multiple cells by allowing secondary cells to carry PUCCH traffic in addition to primary cells. This merging of resources across different cells increases the total available PUCCH capacity in the network, enabling higher network throughput and capacity while maintaining reliability through distributed transmission.
3Adaptability or versatility
If multiple PUCCH groups are implemented, then resource allocation flexibility is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic PUCCH group configuration where the network can flexibly assign cells to different PUCCH groups based on traffic conditions and resource availability. This dynamic allocation allows the system to adapt to changing conditions without requiring complex static configurations, thereby improving flexibility while managing device complexity through algorithmic resource management.
Solution Approach 2:
The patent enables semi-autonomous PUCCH group management where the system can automatically configure and adjust PUCCH resource allocation based on observed traffic patterns and resource utilization. This self-service capability reduces the need for manual configuration complexity while maintaining high flexibility in resource allocation, as the system autonomously optimizes its own resource distribution.
Data Source
AI summary
A wireless device transmits first uplink control information (UCI) on a physical uplink control channel (PUCCH) secondary cell employing an adjustment factor. The adjustment factor is updated when the wireless device receives a transmit power control command for the secondary PUCCH. The wireless device receives a first media access control (MAC) command indicating deactivation of the PUCCH secondary cell. The wireless device stops transmission of uplink signals on the PUCCH secondary cell. The wireless device receives a second MAC command indicating activation of the PUCCH secondary cell. The wireless device transmits a second UCI on the secondary PUCCH.