Dynamic Uplink SCell Deconfig Threshold for Wireless Carrier Aggregation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing uplink carrier aggregation in wireless communication systems faces challenges due to limited UE transmission power, which strains the ability to transmit concurrently on multiple carriers, and the preconfigured UL-SCell-deconfig threshold may not be optimal for varying operational circumstances and spectral efficiency.
Innovation Solution
The access node dynamically varies the UL-SCell-deconfig threshold based on operational circumstances such as the type of communication and UE power class, as well as evaluates and adjusts it based on uplink spectral efficiency to optimize the release of secondary cells, thereby improving power distribution and spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink carrier aggregation is implemented to increase data rate, then uplink throughput is improved, but UE transmission power is insufficient to support concurrent transmission on multiple carriers
Solution Approach 1:
The patent implements dynamic adjustment of the UL-SCell-deconfig threshold based on uplink spectral efficiency measurements. The threshold is not fixed but adapts to current channel conditions and system state, allowing the UE to maintain carrier aggregation under more favorable conditions and release SCell when power becomes constrained, thereby dynamically balancing throughput and power consumption
Solution Approach 2:
The patent introduces a feedback mechanism where the UE measures uplink spectral efficiency and reports it to the network. Based on this feedback, the network dynamically adjusts the UL-SCell-deconfig threshold, creating a closed-loop control system that optimizes the balance between maintaining carrier aggregation for high throughput and releasing SCell when power limitations are reached
2Device complexity
If a fixed UL-SCell-deconfig threshold is used to control SCell release, then system complexity is reduced, but spectral efficiency is not optimized for varying operational circumstances
Solution Approach 1:
The patent transforms the static UL-SCell-deconfig threshold into a dynamic parameter that adapts to changing operational conditions. The threshold is adjusted based on measured uplink spectral efficiency, allowing the system to optimize resource allocation and maintain carrier aggregation when conditions are favorable while reducing complexity of manual configuration
Solution Approach 2:
The system performs self-optimization by automatically measuring uplink spectral efficiency and adjusting the UL-SCell-deconfig threshold without requiring manual intervention. The network autonomously adapts to varying operational circumstances, eliminating the need for complex external configuration while maintaining optimal spectral efficiency
Data Source
AI summary
A method and system for controlling wireless service of a user equipment device (UE) by an access node. The access node serves the UE with uplink carrier-aggregation over a connection encompassing multiple uplink channels including a primary uplink channel (uplink PCell) and a secondary uplink channel (uplink SCell). Further, the access node dynamically sets a channel-quality threshold applicable to control when to deconfigure the uplink SCell from service of the UE, with the dynamically setting of the channel-quality threshold including setting the channel-quality threshold to a value selected based on one or more operational circumstances of the UE, such as whether the UE is engaged in uplink heavy or rather uplink light communication. And the access node applies the dynamically set channel-quality threshold to control when to deconfigure the uplink SCell from service of the UE.