Wireless Relay Duplex Control for High-Frequency Dead Zones
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Solution Overview
Problem
Wireless relay devices such as reflecting surfaces or smart repeaters need to adapt their signal relay operations based on the communication scheme used between a base station and a terminal to improve communication quality in high-frequency bands, particularly addressing dead zones caused by rectilinear radio waves.
Innovation Solution
A wireless relay device that includes a receiving unit to receive information about the duplex scheme used in the network and a control unit to relay downlink and uplink radio signals based on this information, allowing it to control its signal relay operations accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wireless relay device reflects or transmits radio waves to relay signals between base station and terminal, then communication coverage is extended, but the device cannot adapt to different communication schemes (duplex modes)
Solution Approach 1:
The wireless relay device dynamically adjusts its relay operation mode (reflection or transmission) based on the duplex scheme received from the base station. The control unit changes the relay device's state from static to dynamic, allowing it to adapt between half-duplex and full-duplex modes as needed by the communication system.
Solution Approach 2:
The device changes its operational parameters (relay mode, signal processing characteristics) based on the duplex scheme information. When half-duplex is detected, the device uses reflection mode; when full-duplex is detected, the device switches to transmission mode with different signal handling, thus adapting to different communication parameters.
2Reliability
If the wireless relay device uses fixed relay operation mode, then device complexity is reduced, but communication quality deteriorates in high-frequency bands with dead zones
Solution Approach 1:
The control unit receives feedback information about the duplex scheme from the base station and uses this feedback to automatically adjust the relay operation mode. This feedback mechanism allows the device to adapt to changing communication conditions and maintain communication quality without manual intervention.
Solution Approach 2:
The relay device transitions from a static fixed-mode operation to a dynamic adaptive operation that responds to network conditions. The control unit continuously monitors the duplex scheme information and adjusts the relay functionality accordingly to maintain optimal communication performance in high-frequency band environments.
3Productivity
If the wireless relay device transmits and receives signals simultaneously in same direction, then full-duplex communication is enabled, but self-interference occurs
Solution Approach 1:
The wireless relay device acts as an intermediary that receives downlink signals and transmits them to the terminal, while separately receiving uplink signals from the terminal. By using separate reception and transmission paths with appropriate timing control based on duplex scheme information, the device enables full-duplex communication while managing self-interference through spatial and temporal separation of signal paths.
Data Source
AI summary
A wireless relay device includes: a receiving unit configured to receive, from a base station, information about a duplex scheme used in a network; and a control unit configured to relay downlink radio signals and uplink radio signals between the base station and a terminal based on the information about the duplex scheme.