AR Glasses Relay Network for Millimeter-Wave Signal Loss
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Solution Overview
Problem
Millimeter-wave communication systems face challenges in maintaining stable communication quality when multiple augmented reality (AR) terminal devices are concurrently connected, due to high propagation loss and narrow directivity, which can be exacerbated by obstacles such as structures or human bodies, leading to reduced received signal strength and communication disruptions.
Innovation Solution
A communication terminal device with first and second radio-frequency modules and a baseband module that selectively switches between them for reception operations, with the first module performing reception and the second module retransmitting signals, enabling a relay connection among multiple devices to improve communication quality and robustness by building a cooperative relay network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If millimeter-wave communication is used for high-speed and high-capacity communication, then communication speed and capacity are improved, but propagation loss increases and received signal strength decreases
Solution Approach 1:
The communication system is segmented into multiple terminal devices that each perform partial relay functions. Instead of relying on a single direct link, the communication path is divided into multiple hops where each terminal device receives and retransmits signals, thereby distributing the propagation loss across multiple segments rather than concentrating it in a single high-loss millimeter-wave path.
Solution Approach 2:
Terminal devices act as intermediary relay nodes between the base station and other terminals. When a terminal receives a signal via millimeter-wave communication, it retransmits the signal to other terminals, effectively using these intermediaries to bridge communication gaps and mitigate the high propagation loss inherent in millimeter-wave frequencies.
2Quantity of substance
If millimeter-wave communication is used for high-capacity communication, then communication capacity is improved, but received signal strength indicator is reduced due to obstacles
Solution Approach 1:
The communication path is segmented into multiple relay hops through terminal devices. This segmentation allows the system to bypass obstacles that block direct millimeter-wave paths, as signals can be routed through multiple terminal devices rather than requiring a single clear line-of-sight path, thereby maintaining signal strength and reliability.
Solution Approach 2:
The system preemptively establishes relay connections through multiple terminal devices before communication disruptions occur. By having pre-configured relay paths through intermediate terminals, the system cushions against signal strength reductions caused by obstacles, ensuring continuous reliable communication even when direct paths are blocked.
3Area of stationary object
If multiple AR terminals are concurrently connected for broadcast delivery, then service coverage is improved, but communication stability deteriorates due to narrow directivity
Solution Approach 1:
Multiple terminal devices are merged into a cooperative relay network where each terminal contributes to signal transmission and reception. This merging of multiple devices creates a distributed communication infrastructure that maintains stability across a broader coverage area, overcoming the narrow directivity limitation of individual millimeter-wave links.
Solution Approach 2:
The communication architecture transitions from a single-dimension direct link model to a multi-dimensional relay network. Instead of relying on direct line-of-sight paths in one dimension, the system uses multiple relay hops through terminal devices, adding temporal and spatial dimensions to signal transmission, thereby expanding effective coverage while maintaining stability.
Data Source
AI summary
A communication terminal device is a glasses-type communication terminal device having an optically transmissive display mounted thereon. The communication terminal device includes first and second radio-frequency modules that perform radio-frequency signal processing and a baseband module that is connected to the first and second radio-frequency modules via communication lines so as to be communicable and that performs baseband signal processing. The first and second radio-frequency modules are selectively switched by the baseband module to perform a reception operation. When the first radio-frequency module performs the reception operation, a reception signal received by the first radio-frequency module is retransmitted from the second radio-frequency module.