Adaptive Interference Cancellation in Heterogeneous Wireless Networks
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Solution Overview
Problem
Wireless communication networks face interference issues due to transmissions from neighboring base stations and other RF transmitters, which degrade performance in both downlink and uplink communications, especially as demand for mobile broadband access increases and networks become more congested.
Innovation Solution
The method and apparatus for enhancing coverage and throughput in heterogeneous wireless networks involve detecting and canceling interference using adaptive techniques based on colliding Common Reference Signal (CRS) and Dedicated Reference Signal (DRS) tones, such as Demodulation Reference Signal (DMRS) tones, to improve signal quality and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If more UEs access wireless networks to meet growing demand for mobile broadband access, then network capacity and user coverage are improved, but interference between neighboring cells increases and performance degrades
Solution Approach 1:
The patent applies interference cancellation techniques that convert harmful interference signals into useful information. By detecting reference signals from neighboring cells and using them to construct cancellation signals, the system transforms the interference into a beneficial component that improves signal quality and enables higher network capacity while maintaining performance.
2Reliability
If adaptive interference cancellation techniques are applied based on colliding CRS and DRS tones, then signal quality and throughput are improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic interference cancellation by adapting the cancellation strategy based on real-time detection of colliding reference signal tones. The system dynamically determines whether to cancel CRS, DRS, or both, depending on the specific interference conditions detected in each transmission scenario, thereby optimizing signal quality while managing complexity through adaptive rather than fixed approaches.
Data Source
AI summary
A method to enhance coverage and/or throughput in a heterogeneous wireless network includes detecting interference between a neighboring cell and a serving cell. The method also includes cancelling the interference using an adaptive technique based on whether the interference has colliding Common Reference Signal (CRS) tones or whether the interference has colliding Dedicated Reference Signal (DRS) tones.