Signal Relay System Optimizing Throughput via Adaptive Mode Selection
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Solution Overview
Problem
Current communication systems face challenges in maximizing throughput due to varying signal-to-noise ratios between source and relay nodes, leading to inefficient signal transmission in both direct and multi-hop modes.
Innovation Solution
A signal relay system and method that calculates optimal data rates for each link using Adaptive Modulation and Coding (AMC) modes, selects the appropriate mode for each link, and determines the use of superposition mode based on available SNR to maximize data rates between source, relay, and destination nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-hop mode is used for signal transmission, then reliability is improved when direct link quality is poor, but throughput is reduced due to additional transmission hops
Solution Approach 1:
The system dynamically switches between direct transmission mode and multi-hop relay mode based on real-time channel conditions. The source node selects the optimal transmission mode by comparing the direct link SNR with a threshold, allowing the system to adapt to varying channel states and maximize throughput while maintaining reliability.
Solution Approach 2:
The system changes the transmission parameter (transmission mode) based on channel conditions. When the direct link SNR is below a threshold, the system transitions from direct mode to multi-hop mode, effectively changing the transmission path parameters to maintain reliable communication under poor channel conditions.
2Reliability
If relay node is introduced to improve coverage, then system complexity increases, but signal transmission reliability improves
Solution Approach 1:
A relay node is introduced as an intermediary to assist signal transmission when the direct link quality is poor. The relay node receives signals from the source node and forwards them to the destination node, enabling reliable communication in scenarios where direct transmission is insufficient, thereby improving coverage and reliability with controlled complexity.
3Productivity
If higher data rate is selected for direct transmission, then throughput is improved, but transmission reliability deteriorates due to lower SNR margin
Solution Approach 1:
The system dynamically adjusts the data rate based on the measured direct link SNR. When the SNR is high, the system selects higher data rates to maximize throughput. When the SNR is low, the system switches to multi-hop mode with more robust modulation and coding schemes, thereby maintaining reliability while adapting throughput to channel conditions.
Data Source
AI summary
A source node of a communication system selects one of a direct mode, a multi-hop mode, and a superposition mode as a transmission mode to be used for signal transmission from the source node to a destination node, taking into account data rates for a link between the source node and the destination node, a link between the source node and a delay node, and a link between the relay node and the destination node, thereby increasing the data rate, i.e., the throughput, of the entire communication system.