Relay Node Simulator for Signal Delay and Attenuation
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Solution Overview
Problem
In relay node systems, ensuring sufficient isolation between wireless backhaul and access lines operating at the same frequency is challenging, leading to signal interference, and existing solutions fail to effectively simulate and set delays and attenuations caused by positional relationships between base stations, relay nodes, and mobile communication terminals.
Innovation Solution
A relay node simulator that displays and allows setting of positional relationships between base stations, relay nodes, and mobile communication terminals, calculating and visualizing delays and attenuations, and generating test signals accordingly to simulate real-world signal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If wireless backhaul line and wireless access line are operated at the same frequency, then frequency utilization is improved, but signal interference occurs due to insufficient isolation between transmission and reception units
Solution Approach 1:
The patent applies time division multiplexing to operate the wireless backhaul line and wireless access line at the same frequency by alternating their operation in different time periods. The transmission and reception are controlled not to be carried out simultaneously, with time division multiplexing parameters configured to ensure that when one line transmits, the other receives, thereby avoiding interference while maintaining high frequency utilization.
2Device complexity
If signal levels and delays are not adjusted according to positional relationships, then system complexity is reduced, but signal interference occurs and terminal operation verification becomes difficult
Solution Approach 1:
The patent calculates the signal levels and delays based on the positional relationships between the base station, relay node, and terminal before conducting terminal operation verification. By preliminarily adjusting the signal parameters according to the configured positions, the system creates realistic test conditions without requiring complex real-time adjustments during actual testing.
Solution Approach 2:
The patent uses a simulator to create a virtual model that copies the physical positional relationships and signal characteristics. The simulator generates test signals that replicate the attenuation and delay effects that would occur in actual deployment, allowing verification of terminal operations under realistic conditions without needing the actual physical infrastructure in place.
3Measurement precision
If manual setting of delay and attenuation parameters is required, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent implements automatic calculation of delay and attenuation parameters based on the positional relationships configured in the simulator. The system self-determines the appropriate test signal parameters by calculating the distances between nodes and applying the corresponding propagation characteristics, eliminating the need for manual parameter setting while maintaining high precision.
Data Source
AI summary
A relay node simulator includes a marker display control unit that correlates a base station marker, a relay node marker, and a terminal marker to a predetermined coordinate system and allows the makers to be displayed on an operation screen, and that allows at least one of the markers to be displayed on the operation screen in a movable manner in accordance with an operation input, a position specifying unit that specifies respective positions of the respective markers in the coordinate system, and a pattern display control unit that allows a magnitude of a characteristic value relating to a first RF signal or a second RF signal to be displayed on the operation screen as a discriminable pattern, wherein, a test signal to which the characteristic value corresponding to the specified position is applied is output.