Mobile Communication System Interference Management via UE Mediator
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Solution Overview
Problem
The complexity of configuring X2 interfaces between macro cells and HeNBs, especially when HeNBs are deployed and managed by general users rather than operators, leads to complications in managing interference between macro cells and HeNBs.
Innovation Solution
A mobile communication system where a large-scale base station device notifies, via user equipment present in its coverage, small-scale base station devices of interference-related information, such as High Interference Indication (HII) and Overload Indicator (OI), to avoid interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If X2 interfaces are configured between macro cells and HeNBs for direct interference management, then interference control capability is improved, but system complexity and configuration difficulty increase significantly
Solution Approach 1:
The patent introduces user equipment as an intermediary to transmit interference-related information from macro cells to HeNBs. Instead of direct macro cell to HeNB signaling through complex X2 interfaces, the macro cell sends interference information to user equipment, which then forwards it to HeNBs. This mediator approach simplifies the overall system architecture while maintaining interference management capability.
Solution Approach 2:
User equipment performs the dual function of receiving interference information from macro cells and autonomously forwarding it to relevant HeNBs. This self-service mechanism eliminates the need for complex centralized interference management systems, allowing the network to self-organize and distribute interference information efficiently without requiring sophisticated configuration infrastructure.
2Reliability
If X2 interfaces are deployed for interference notification between base stations, then interference management effectiveness is improved, but ease of operation and deployment difficulty worsen
Solution Approach 1:
User equipment serves as a distributed intermediary that automatically handles interference information transmission. Macro cells send interference notifications to user equipment, which then forwards them to HeNBs without requiring manual configuration of X2 interfaces. This mediator approach maintains effective interference management while dramatically simplifying deployment operations.
3Adaptability or versatility
If general users deploy and manage HeNBs independently, then system flexibility and adaptability are improved, but interference management complexity increases
Solution Approach 1:
The patent enables user equipment to autonomously forward interference information to HeNBs deployed by general users. This self-service mechanism allows independent HeNB deployment while automatically maintaining interference management capabilities. The user equipment handles the complexity of information forwarding, allowing general users to deploy HeNBs without managing complex interference coordination themselves.
Data Source
AI summary
A mobile communication system includes a user equipment and a plurality of base stations that perform radio communication with the user equipment. A first base station among the plurality of base stations notifies the user equipment of an uplink communication parameter. The first base station notifies a second base station of the uplink communication parameter and an identifier of the first base station, the second base station being another base station among the plurality of base stations different from the first base station. The user equipment transmits an uplink signal using the uplink communication parameter. The first base station and the second base station receive the uplink signal transmitted from the user equipment.