Relay Node Signal Relaying for Full-Duplex Throughput
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Solution Overview
Problem
Current wireless communication systems are predominantly half-duplex, which limits network throughput and efficiency, as they cannot transmit and receive data simultaneously, and there is a lack of feasible hardware solutions for full-duplex wireless communication systems.
Innovation Solution
A method for signal relaying using a relay system that employs both diversity and multiplexing modes, where the relay node receives signals with power allocation, demodulates, re-modulates, and transmits them to a destination with a specific delay, enabling simultaneous transmission and reception and improving network throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If half-duplex communication is used, then hardware complexity is reduced, but network throughput and transmission efficiency deteriorate due to inability to transmit and receive simultaneously
Solution Approach 1:
The patent introduces a relay node as an intermediary between source and destination. The relay receives signals from the source, processes them through demodulation and re-modulation, and forwards to the destination. This intermediary enables full-duplex operation where the relay can simultaneously receive from source and transmit to destination, resolving the contradiction between hardware complexity and network throughput by distributing the full-duplex capability across multiple nodes rather than requiring complex full-duplex hardware at each endpoint.
Solution Approach 2:
The communication system is segmented into multiple functional nodes (source, relay, destination) with distinct roles. The relay node specifically handles signal reception, demodulation, re-modulation, and transmission functions. This segmentation allows the system to achieve full-duplex throughput by dividing the communication task across nodes that can operate simultaneously in different directions, avoiding the need for complex full-duplex hardware at each node while maintaining high network throughput.
2Productivity
If full-duplex communication is implemented, then network throughput and transmission efficiency improve, but self-interference and signal quality deteriorate
Solution Approach 1:
The patent extracts the full-duplex operation from individual nodes and relocates it to the relay node. The relay node performs simultaneous reception from source and transmission to destination, effectively taking out the self-interference problem from the source-destination link. By positioning the relay as the full-duplex node and using power allocation to separate the received and transmitted signals, the system achieves high throughput while managing self-interference at the relay rather than at the source or destination.
Solution Approach 2:
The patent employs power allocation as a parameter change strategy. Different power levels are assigned to signals received from the source and signals transmitted to the destination at the relay node. This power differentiation allows the relay to manage self-interference by adjusting the relative power of simultaneous transmit and receive operations, enabling full-duplex communication with controlled interference levels and maintained signal quality.
3Reliability
If half-duplex operation is used, then signal quality is maintained, but transmission time and resource utilization worsen due to sequential transmission requirements
Solution Approach 1:
The patent implements continuous useful action through full-duplex operation at the relay node. The relay continuously receives signals from the source while simultaneously transmitting processed signals to the destination, eliminating the idle periods inherent in half-duplex systems. This continuity of operation reduces transmission time and improves resource utilization while maintaining signal quality through proper power allocation and signal processing at the relay.
Data Source
AI summary
A method for relaying signal and a relay using the same are proposed. The method is applicable to a relay. The method includes: receiving a signal with power allocation from a source; demodulating the signal to extract a symbol; re-modulating the symbol to a re-modulated symbol; and transmitting the re-modulated symbol to a destination according to a specific delay.