Base Station Carrier Aggregation Management for Congestion
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Solution Overview
Problem
In cellular wireless networks, base stations face limitations in processing power, restricting the number of UEs that can use carrier aggregation, leading to congestion and delayed data transmission when air interface resources are overwhelmed, necessitating a method to dynamically manage carrier aggregation services.
Innovation Solution
A base station method to detect congestion and selectively disable carrier aggregation for UEs served with higher-order modulation schemes, transitioning them to single-carrier service to free up resources for UEs that need carrier aggregation, thereby optimizing air interface resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation service is provided to multiple UEs simultaneously, then data throughput and air interface resource utilization are improved, but base station processing power is overwhelmed causing congestion and service degradation
Solution Approach 1:
The base station dynamically adjusts carrier aggregation service allocation based on real-time processing capacity and congestion conditions. When congestion is detected, the base station selectively discontinues carrier aggregation for specific UEs and transitions them to single-carrier mode, thereby reducing processing load while maintaining service continuity. This dynamic adaptation resolves the contradiction between maximizing throughput and managing processing complexity.
Solution Approach 2:
The system changes the operational parameters of UE service mode by transitioning from carrier aggregation (multi-carrier) to single-carrier mode selectively. This parameter change allows the base station to reduce processing complexity for specific UEs while maintaining overall network productivity by preserving carrier aggregation for other UEs that can still benefit from it.
2Productivity
If carrier aggregation is maintained for all UEs, then air interface resource utilization is maximized, but data transmission delay increases due to congestion
Solution Approach 1:
The base station extracts specific UEs from the carrier aggregation service group when congestion is detected, transitioning them to single-carrier mode. This extraction reduces the processing burden on the base station and decreases data transmission delay for affected UEs, while carrier aggregation continues for other UEs, maintaining overall air interface resource utilization.
3Reliability
If carrier aggregation service is selectively discontinued for some UEs, then base station processing capacity is reduced, but service quality for other UEs is improved
Solution Approach 1:
The base station applies different service qualities to different UEs based on local conditions. Selectively congested UEs are transitioned to single-carrier mode with improved reliability and reduced delay, while other UEs continue to享受 carrier aggregation benefits. This localized quality adjustment resolves the contradiction by optimizing service for specific UEs without significantly impacting overall network productivity.
Data Source
AI summary
Methods and systems for controlling service by a base station when the base station is serving both a first UE without carrier aggregation and a plurality of second UEs with carrier aggregation. As a basis for invoking carrier aggregation service for the first UE, the base station selects one of the second UEs to transition from being served by the base station with carrier aggregation to being served by the base station without carrier aggregation. The base station makes such a selection based at least in part on a modulation and coding scheme that the base station uses to serve the selected one of the second UEs. The base station transitions from serving the selected second UE with carrier aggregation to serving the selected second UE without carrier aggregation. And the base station transitions from serving the first UE without carrier aggregation to serving the first UE with carrier aggregation.