Dynamic Carrier Aggregation Activation in LTE-Advanced
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Solution Overview
Problem
In LTE-Advanced systems, existing technologies face challenges in dynamically managing carrier aggregation, leading to inefficient resource utilization and increased signaling costs due to the inability to accurately activate and release secondary component carriers based on real-time transmission needs.
Innovation Solution
A dynamic mechanism is introduced that activates or releases secondary component carriers based on buffer state thresholds, allowing for fine-grained radio resource allocation, minimizing unnecessary activation and signaling overhead, and optimizing carrier aggregation by using downlink buffer information and uplink buffer state reports to determine the activation and release of SCCs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is activated to satisfy transmission rate requirements, then transmission capacity is improved, but signaling overhead and channel cost increase
Solution Approach 1:
The patent implements dynamic activation and release of secondary component carriers based on real-time buffer state monitoring. The base station activates SCCs when downlink buffer exceeds a threshold and releases them when buffer falls below a threshold, making the carrier aggregation configuration adaptive to actual transmission needs rather than static, thereby improving transmission capacity only when necessary and reducing signaling overhead during low-traffic periods
Solution Approach 2:
The system employs feedback mechanisms where the base station monitors downlink buffer states and uplink buffer state reports from user equipment, then uses this feedback information to dynamically control SCC activation and release decisions, creating a closed-loop control system that optimizes the balance between transmission capacity and signaling overhead
2Adaptability or versatility
If multiple secondary component carriers are activated simultaneously, then resource allocation flexibility is improved, but device complexity and management overhead increase
Solution Approach 1:
The patent segments the carrier aggregation management into independent activation and release operations, where secondary component carriers are activated or released one at a time based on buffer state thresholds rather than批量 operations. This segmentation simplifies the management complexity while maintaining resource allocation flexibility through incremental carrier addition or removal
Solution Approach 2:
The system dynamically adjusts the number of active SCCs based on real-time buffer conditions, transitioning from static carrier configuration to dynamic adaptation. The base station monitors buffer states and activates/releases SCCs individually as needed, providing flexible resource allocation while keeping management complexity manageable through rule-based automated decisions
Data Source
AI summary
Various embodiments of a scheme of dynamic activation and release of carrier aggregation in an LTE-Advanced system are provided. When transmission need of an LTE-Advanced user is large and the user is within coverage of at least one secondary component carrier, carrier aggregation is activated while a certain amount of resource of each component carrier is preserved to support carrier aggregation. This avoids unnecessary activation and waste due to signaling cost. When the primary component carrier of an LTE-Advanced user has sufficient resource to satisfy transmission need of the user or when the user is not within coverage of at least one secondary component carrier, carrier aggregation is released. This minimizes complex measurement and cost of controlling signals due to multi-carrier scheduling.