Carrier Offloading in 5G Mobile Communication Systems
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Solution Overview
Problem
In mobile communication systems supporting carrier aggregation, existing methods fail to effectively manage overload situations, leading to suboptimal user perceived performance due to inefficient carrier resource utilization.
Innovation Solution
A method and apparatus for a base station to select candidate terminals for offloading, obtain neighbor cell information, and determine a target cell for improved throughput, allowing terminals on overloaded carriers to switch to less loaded carriers, thereby optimizing user perceived performance and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is used to increase data transmission capacity, then system throughput is improved, but carrier overload occurs leading to performance degradation
Solution Approach 1:
The patent implements dynamic carrier selection where the base station continuously monitors load conditions on aggregated carriers and adaptively switches terminals between carriers based on real-time throughput measurements. This dynamic adjustment allows the system to maintain high data transmission capacity while avoiding overload conditions that degrade user perceived performance.
Solution Approach 2:
The patent changes the operational parameters of carrier aggregation by introducing load-based carrier switching. When a carrier becomes overloaded, the system changes the active carrier configuration for affected terminals, selecting alternative carriers with better load conditions. This parameter change resolves the contradiction by maintaining productivity through carrier aggregation while preventing reliability degradation through adaptive load management.
2Ease of operation
If terminals remain on overloaded carriers, then carrier resource utilization is simple to manage, but user perceived performance deteriorates
Solution Approach 1:
The patent implements a self-service mechanism where the base station autonomously monitors carrier load conditions and automatically performs carrier switching for terminals without requiring manual intervention. The system self-adjusts by measuring throughput on different carriers and independently deciding which terminals to switch, maintaining ease of operation while improving user perceived performance through automatic overload management.
3Reliability
If terminals are switched to different carriers to resolve overload, then user perceived performance is improved, but system complexity increases
Solution Approach 1:
The patent employs feedback mechanisms where the base station measures throughput performance on aggregated carriers and uses this feedback to make informed carrier switching decisions. The system continuously monitors load conditions and performance metrics, then adjusts carrier allocation accordingly. This feedback-driven approach improves user perceived performance while managing complexity through systematic, data-driven decision-making rather than arbitrary switching.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method for controlling a terminal in a base station of a mobile communication system, according to an embodiment of the present application, comprises the steps of: selecting at least one candidate terminal for offloading; obtaining information on a neighbor cell of at least one of the candidate terminals; obtaining throughput improvement information according to offloading on the basis of information on the candidate terminal and load information of the neighbor cell of the candidate terminal; obtaining information on a target cell corresponding to the candidate terminal on the basis of the throughput improvement information; selecting a target terminal to be offloaded from the candidate terminals on the basis of the throughput improvement information corresponding to the target cell; and transmitting, to the target terminal, a message instructing offloading to the target cell corresponding to the target terminal.