Relay Node Interference Control via Dynamic Channel Coefficients
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Solution Overview
Problem
In multi-hop networks, existing technologies face challenges in controlling interference between multiple node pairs and relay nodes, leading to inefficiencies in signal transmission due to inter-stream interference.
Innovation Solution
The method involves cooperation between relay nodes and node pairs to adjust channel coefficients, creating an alternating topology that dynamically changes interference channels, allowing for concurrent symbol transmission processes while minimizing interference through linear time-varying amplify-and-forward, quantize-and-forward, or compute-and-forward schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple node pairs transmit signals concurrently in a multi-hop network, then network throughput and capacity are improved, but interference between relay nodes and node pairs increases
Solution Approach 1:
The patent implements dynamic interference control by adjusting channel coefficients in real-time based on network conditions. The relay nodes and destination nodes dynamically modify transmission parameters to adapt to changing interference environments, enabling concurrent transmissions while maintaining signal quality through time-varying channel adjustments
Solution Approach 2:
The patent changes channel coefficients as key parameters to control interference. By adjusting these coefficients dynamically, the system transforms the interference problem into a parameter optimization problem, where specific coefficient values are selected to minimize interference while maximizing throughput for concurrent node pairs
2Object-generated harmful factors
If traditional time division multiplexing is used to control interference, then interference between node pairs is reduced, but network capacity and throughput are limited
Solution Approach 1:
The patent employs periodic action through alternating topology changes where relay nodes and destination nodes take turns being in active transmission states. This periodic switching creates structured interference patterns that can be predicted and managed, allowing multiple node pairs to share the medium more efficiently than traditional TDM while maintaining interference control
Solution Approach 2:
The patent converts interference from a harmful factor into a useful resource by having destination nodes use interference signals as information about other transmissions. Through intelligent signal processing and channel coefficient adjustment, what would normally be pure noise becomes additional information that can be exploited to improve overall network capacity and enable more concurrent transmissions
Data Source
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AI summary
A method and apparatus to control interference in a relay node are provided and include simultaneously receiving a symbol from source nodes, adjusting channel coefficients; and relaying the symbol to destination nodes with adjusted channel coefficients. The simultaneously receiving and the relaying are performed during a symbol transmission process between the source and destination nodes.