Carrier Aggregation Latency Management for Wireless Networks
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Solution Overview
Problem
Base stations in wireless communication systems face challenges in managing latency and data rate limitations when serving user equipment (UEs), particularly when existing carriers are heavily loaded or experiencing high latency, which can impact the quality of service for latency-sensitive content.
Innovation Solution
The method involves selecting an additional carrier with low latency to be added to the UE's radio-link-layer connection for carrier aggregation, based on latency measurements and service level considerations, to enhance data rate and reduce latency for UEs, using a base station controller to determine and implement the optimal carrier selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is used to increase data rate, then throughput to UE is improved, but latency may increase due to additional carriers
Solution Approach 1:
The system dynamically changes the parameter of carrier selection based on latency measurements. The base station monitors latency on each carrier and adjusts carrier aggregation configuration by adding or removing carriers based on current latency conditions, thereby optimizing the balance between throughput and latency
Solution Approach 2:
The system implements feedback by continuously measuring latency on each carrier and using this information to make dynamic decisions about carrier aggregation. The base station receives latency measurements and adjusts the carrier configuration accordingly, creating a closed-loop control system that adapts to changing network conditions
2Productivity
If multiple carriers are aggregated to serve UE, then bandwidth and data rate are improved, but system complexity increases
Solution Approach 1:
The system enables self-service by allowing the base station to automatically monitor latency, evaluate carrier conditions, and make carrier aggregation decisions without manual intervention. The base station autonomously manages carrier aggregation by selecting carriers based on measured latency, reducing the need for complex external control mechanisms
3Reliability
If carriers with low latency are selected for aggregation, then service quality for latency-sensitive content is improved, but the number of available carriers may be limited
Solution Approach 1:
The system changes the selection criterion parameter from static to dynamic by using real-time latency measurements. Instead of predetermined carrier selections, the base station dynamically evaluates latency on each carrier and adjusts carrier aggregation based on current network conditions, ensuring optimal service quality while maintaining flexibility
Data Source
AI summary
A method and system for managing carriers on which a base station provides service to a user equipment device (UE), based on consideration of latency. A base station that is arranged to operate on a plurality of carriers may, while serving a UE on a set of one or more carriers of the plurality, select, from at least two other carriers of the plurality, an additional carrier to add to the set of one or more carriers on which the base station serves the UE, and may make the selection based a latency on the selected carrier. In response to selecting the additional carrier, the base station may add the selected carrier to the set of one or more carriers on which the base station serves the UE, and may then serve the UE on the set of one or more carriers including the selected carrier.