Access Node Coverage Area Adjustment for Co-Channel Interference
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Solution Overview
Problem
Co-channel interference occurs in wireless networks when adjacent access nodes use the same frequency band, leading to interference in overlapping coverage areas, which affects wireless device communications and service quality.
Innovation Solution
Instructing access nodes to deploy radio air interfaces using specific frequency bands over reduced coverage areas, determined by interference levels, to minimize overlap and enable seamless handovers between frequencies and access nodes, while maintaining default coverage areas for continuous service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If adjacent access nodes deploy radio air interfaces using the same frequency band to maximize resource utilization, then network capacity and resource efficiency are improved, but co-channel interference occurs in overlapping coverage areas degrading service quality
Solution Approach 1:
The patent applies local quality by differentiating coverage area configurations based on location. Default coverage areas use full frequency bands for high-capacity regions, while reduced coverage areas use restricted frequency bands at cell edges to minimize interference. This spatial differentiation allows same-frequency deployment in non-overlapping regions while preventing interference in overlapping regions through frequency restriction.
Solution Approach 2:
The patent implements dynamics by enabling access nodes to dynamically switch between default and reduced coverage area configurations. The network can adaptively adjust which access nodes operate in reduced coverage mode based on interference conditions, traffic patterns, and handover requirements, allowing flexible optimization of the contradiction between capacity and interference.
2Object-affected harmful factors
If access nodes reduce coverage areas to minimize overlap and interference, then co-channel interference is reduced, but coverage continuity and service availability may be compromised
Solution Approach 1:
The patent applies preliminary action by pre-configuring both default and reduced coverage area settings in access nodes before interference occurs. Handover parameters and frequency restrictions are prepared in advance, allowing the network to quickly switch to reduced coverage mode when interference is detected without service interruption, thus maintaining reliability while reducing interference.
Solution Approach 2:
The patent uses handover procedures as an intermediary mechanism to bridge between default and reduced coverage areas. When a wireless device moves into a reduced coverage area, the network mediates a handover to an appropriate frequency or access node, ensuring continuous service availability while the device transitions through interference-prone regions.
3Productivity
If multiple frequency bands are deployed across access nodes to increase network capacity, then resource utilization improves, but the number of overlapping interference regions increases
Solution Approach 1:
The patent applies segmentation by dividing the frequency band deployment into distinct segments: default coverage areas with full frequency access and reduced coverage areas with restricted frequency access. This segmentation allows multiple frequency bands to be deployed across the network while organizing interference management into manageable segments rather than requiring coordinated control of all frequencies simultaneously across all nodes.
Data Source
AI summary
Mitigating co-channel interference includes instructing a first access node to deploy a first radio air interface utilizing a first frequency band over a first default coverage area, instructing the first access node to deploy a second radio air interface utilizing a second frequency band over a first reduced coverage area, instructing a second access node to deploy a third radio air interface utilizing the first frequency band over a second reduced coverage area, and instructing the second access node to deploy a fourth radio air interface utilizing a second frequency band over a second default coverage area.