Non-regenerative relay communication system
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Solution Overview
Problem
Existing non-regenerative relay communication systems face challenges in performing full-duplex communication due to self-interference and the need for channel estimations with different antennas, which hinder efficient expansion of ultra-low latency communication coverage.
Innovation Solution
A non-regenerative relay communication system that calculates signal-to-noise ratios and propagation delays using delay calculation and matrix calculation means, selects optimal relay stations and communication stations based on these values, and suppresses self-interference through process delay calculation, allowing efficient full-duplex communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex communication is used in non-regenerative relay, then communication efficiency is improved, but self-interference occurs making communication difficult
Solution Approach 1:
The patent converts the harmful self-interference signal into a useful channel estimation signal. By treating the transmitted signal that leaks into the reception path as a known reference signal, the system can estimate the channel characteristics and use this information to improve communication performance rather than simply trying to eliminate the interference.
Solution Approach 2:
The patent introduces an intermediary processing step where the self-interference signal is first measured and used to calculate channel estimates before the actual communication signal processing. This intermediary calculation of propagation delay and channel characteristics acts as a mediator that transforms the harmful interference into useful information for enabling full-duplex operation.
2Object-affected harmful factors
If different antennas are used for transmission and reception to reduce self-interference, then self-interference is suppressed, but channel estimations become more complex
Solution Approach 1:
The patent makes the transmission antenna serve multiple functions: it is used both for transmitting communication signals and for providing reference signals for channel estimation. By utilizing the transmitted signal itself as the reference signal for estimation, the system eliminates the need for separate dedicated reference signal antennas, thereby simplifying the overall system while maintaining accurate channel knowledge.
3Area of stationary object
If regenerative relay is used to expand coverage, then coverage is improved, but delay of a millisecond or more occurs preventing ultra-low latency communication
Solution Approach 1:
The patent extracts only the essential amplification function from the relay operation, removing the demodulation and decoding steps that cause delay. By taking out the complex signal processing operations and retaining only the signal amplification and forwarding capability, the system achieves both coverage extension and ultra-low latency performance.
Solution Approach 2:
The patent employs a simple amplifier-based relay station that does not perform complex processing, effectively using a low-cost, simple device for the relay function. This approach sacrifices the intelligence and adaptability of regenerative relays but gains speed and simplicity, enabling ultra-low latency communication while still expanding coverage.
4Device complexity
If non-regenerative relay with half-duplex communication is used, then implementation is simplified, but communication efficiency is reduced
Solution Approach 1:
The patent enables continuous simultaneous transmission and reception at the relay station through full-duplex operation. Instead of alternating between transmit and receive modes as in half-duplex systems, the relay can continuously perform both operations simultaneously, thereby doubling the effective communication efficiency while maintaining relatively simple amplifier-based hardware.
Data Source
AI summary
A non-regenerative relay communication system performs non-regenerative relay communication between a first communication station and a second communication station via a relay station. The system includes first delay calculation means that calculates a first signal-to-noise ratio in communication between the first communication station and the relay station and a first propagation delay that indicates a delay in the communication between the first communication station and the relay station based on a signal, second delay calculation means that calculates a second signal-to-noise ratio in communication between the second communication station and the relay station and a second propagation delay that indicates a delay in the communication between the second communication station and the relay station based on a signal, and communication determination means that performs the non-regenerative relay communication based on the first signal-to-noise ratio and the first propagation delay, and the second signal-to-noise ratio and the second propagation delay.