Carrier Coordination Device for Interference Reduction in Heterogeneous Networks
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Solution Overview
Problem
In LTE-Advanced systems, edge users experience significant interference due to the dense deployment of small cells and poor performance, especially in heterogeneous networks, where traditional interference coordination schemes are inadequate, leading to service disruptions and degraded performance.
Innovation Solution
A carrier coordination device and method that receive interference information and carrier state information to determine interference source base stations, coordinating carrier use to reduce interference by reallocating carriers or switching between them, thereby improving edge user performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If small cells are densely deployed to increase network capacity and coverage, then network coverage and capacity are improved, but interference to edge users increases significantly
Solution Approach 1:
The patent applies local quality by differentiating treatment for different user locations. Edge users experiencing interference are identified through measurement reports, and specific carrier coordination actions are taken only for these affected users rather than uniformly affecting all users. The system determines interference source base stations and applies carrier switching or coordination specifically to edge users in the coverage of interfering small cells, thereby maintaining high network capacity while protecting edge user performance.
2Reliability
If Component Carrier Select scheme is applied to coordinate interference in heterogeneous networks, then edge user performance is improved, but system complexity increases
Solution Approach 1:
The patent implements self-service by enabling user equipment to autonomously measure interference levels and generate measurement reports containing interference information. The UE independently identifies interference source base stations and carries out carrier switching or carrier use coordination without requiring complex centralized control. This self-service approach reduces the complexity of the coordination system while maintaining effective interference management for edge users.
3Reliability
If carrier coordination is performed to reduce interference for edge users, then edge user performance is improved, but carrier allocation flexibility is reduced
Solution Approach 1:
The patent applies dynamics by implementing flexible and adaptive carrier allocation. The system dynamically determines which carriers to coordinate based on real-time interference measurements and user location. When interference is detected, the system dynamically switches carriers for affected edge users or dynamically coordinates carrier usage between base stations. This dynamic approach maintains carrier allocation flexibility for the majority of users while providing targeted interference protection for edge users, thus balancing performance improvement with allocation flexibility.
Data Source
AI summary
A carrier coordination device and system, a communications device and method, and a measurement device and method. The carrier coordination device includes: a receiving unit, used to receive interference information for describing interference suffered by a user equipment; and a coordination unit, used to determine an interfering source base station of the user equipment according to the interference information, and coordinate carrier use of the user equipment and/or the interfering source base station at least based on the interference information and carrier state information of the interfering source base station, to reduce the interference suffered by the user equipment. The technology can be applied in a wireless communications field.