Coaxial RF Cable Wi-Fi Backhaul to Reduce Mesh Interference
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Solution Overview
Problem
The increasing number of wireless devices in homes and offices leads to interference and reduced performance in mesh network Wi-Fi systems, necessitating multiple re-transmissions due to reception errors, which are exacerbated by intermodulation and harmonic distortions.
Innovation Solution
Transmitting Wi-Fi signals between satellite and central mesh nodes using a co-axial RF cable, downconverting signals to a frequency suitable for the cable and upconverting them back to the original frequency for wireless transmission, thereby reducing interference and maintaining high throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If Wi-Fi signals are transmitted over air between satellite mesh node and central mesh node, then wireless connectivity is provided, but interference from other signals increases causing intermodulation distortion and harmonic distortions
Solution Approach 1:
The patent introduces an RF cable as an intermediary medium to transmit Wi-Fi signals between the satellite mesh node and central mesh node. This physical cable acts as a dedicated communication channel that isolates the mesh network traffic from other wireless signals in the environment, eliminating intermodulation and harmonic distortions caused by air transmission while maintaining wireless connectivity for end devices.
Solution Approach 2:
The patent extracts the backbone communication traffic between mesh nodes from the shared wireless medium and places it on a separate dedicated RF cable connection. This separation removes the harmful interference elements from the critical node-to-node communication path while leaving the wireless environment available for client device connections.
2Adaptability or versatility
If multiple wireless devices connect to the Wi-Fi network, then network coverage is improved, but interference increases requiring multiple re-transmissions
Solution Approach 1:
The patent segments the network communication into two distinct paths: (1) wireless communication between the mesh system and client devices, and (2) wired RF cable communication between mesh nodes. This segmentation allows the wireless portion to support multiple devices while the wired backbone maintains high-speed, interference-free data exchange, eliminating the need for re-transmissions.
Solution Approach 2:
The RF cable serves as an intermediary that handles backbone traffic between nodes, allowing the wireless medium to be dedicated to client device communications. This mediator prevents interference from accumulating in the critical node communication path even as the number of wireless devices increases.
3Ease of manufacture
If MoCA standard is used for RF cable communication, then data transmission over cable is achieved, but market scalability is limited due to single vendor chipset
Solution Approach 1:
The patent makes the RF cable communication system universal by using standard Wi-Fi chipsets that can operate in cable mode, rather than requiring proprietary MoCA chipsets. This allows any Wi-Fi enabled device to function over RF cable infrastructure, making the solution scalable across multiple vendors and compatible with existing Wi-Fi hardware ecosystems.
Solution Approach 2:
The patent effectively creates a cable-based copy of Wi-Fi communication by making Wi-Fi chipsets operate over RF cables instead of wireless medium. This approach leverages the existing Wi-Fi protocol stack and hardware, allowing standard Wi-Fi devices to be replicated and deployed over cable infrastructure without requiring specialized MoCA hardware.
4Ease of manufacture
If DOCSIS standard is used for RF cable communication, then data transmission over cable is achieved, but cost increases by at least three times
Solution Approach 1:
The patent employs inexpensive, widely-available Wi-Fi chipsets for cable-based communication instead of expensive DOCSIS infrastructure. By using off-the-shelf Wi-Fi hardware that can operate in cable mode, the solution achieves cable communication capability at a fraction of the cost of proprietary DOCSIS solutions, making it economically viable for deployment.
Solution Approach 2:
The patent creates a cost-effective copy of cable communication functionality by adapting Wi-Fi chipsets to operate over RF cables. This approach replicates the essential cable transmission capability without requiring expensive DOCSIS-certified hardware, achieving similar functional outcomes at significantly lower cost.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method reduces interference, minimizes signal distortion, and enhances network performance with lower costs and scalability, utilizing existing Wi-Fi chipset technology for compatibility with future standards.
Implementation Method 1
a downconverter, the downconverter downconverting the Wi-Fi signal to a frequency suitable for transmission on the RF cable
Implementation Method 2
an upconverter, the upconverter upconverting the received signal to a frequency of the Wi-Fi signal
Data Source
AI summary
A Wi-Fi mesh network uses a co-axial radio frequency (RF) cable to communicate between a central Wi-Fi mesh network node and one or more satellite Wi-Fi mesh network nodes instead of communicating wirelessly over the air between those nodes. In an example embodiment, the Wi-Fi signals are down-converted to a ˜500 MHz frequency range at the central Wi-Fi mesh network node and then passed through the RF cable. At the receiving end, the down-converted signal is then up-converted back from the ˜500 MHz frequency range to one of the 2.4 GHz, 5 GHz or 6 GHz frequency bands, which may then be wirelessly transmitted via Wi-Fi chipset of the satellite Wi-Fi mesh network node.