Leaky Feeder Mesh Backhaul for Underground Communication Gaps
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Solution Overview
Problem
Current communication systems, such as leaky feeder and mesh networks, face challenges in providing reliable wireless communication in underground environments due to poor radio wave propagation and limited data transmission capabilities, especially in underground mines where frequencies above VHF band do not penetrate well, and mesh networks are not well-suited for dynamic topologies.
Innovation Solution
An integrated leaky feeder and mesh network system using radiating coaxial cables to connect mesh nodes, allowing for self-forming and self-healing networks with a hardwired backhaul link, enabling simultaneous wireless and wired connections, higher bandwidth, and fault tolerance, while eliminating the need for amplifiers and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional leaky feeder cables are used for underground communication, then signal propagation in underground environments is improved, but data transmission capabilities remain limited compared to modern packet switched networks
Solution Approach 1:
The patent combines leaky feeder cable technology with modern mesh network protocols to create an integrated system that maintains reliable underground signal propagation while enabling modern packet-switched data transmission capabilities
Solution Approach 2:
The system makes the leaky feeder cable serve multiple functions: traditional voice communication and modern high-capacity data transmission, allowing a single infrastructure to support both legacy and contemporary communication needs
2Productivity
If mesh networks are deployed in underground tunneling environments, then modern data transmission capabilities are achieved, but the topology is not well-suited for dynamic underground conditions
Solution Approach 1:
The system implements dynamic mesh network protocols that automatically adapt to changing underground conditions, allowing nodes to self-organize and reconfigure routes based on real-time environmental factors and node availability
3Reliability
If access points are interconnected using hardwired networks in tunnel environments, then network connectivity is provided, but installation complexity increases and distance limitations require fiber optic conversion
Solution Approach 1:
The patent extracts the backhaul connection requirement from traditional access point architecture by implementing direct peer-to-peer wireless connections between mesh nodes, eliminating the need for physical cabling infrastructure in harsh underground environments
4Length of stationary object
If amplifiers are added to leaky feeder systems to boost signal, then transmission distance is extended, but system complexity and latency increase
Solution Approach 1:
The system divides the underground communication space into multiple overlapping wireless mesh network segments, where each node acts as a signal regeneration point, extending overall transmission distance without requiring traditional amplifiers along the cable
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
The system provides seamless communication coverage in complex enclosed spaces, including underground tunnels and mine shafts, with improved bandwidth, fault tolerance, and compatibility with standard Ethernet networks, enabling efficient data, voice, and video transmission.
Implementation Method 1
leaky feeder cables were implemented. These cables would carry the signal along a central conductor and 'leak' or radiate small amounts of RF along its length
Data Source
AI summary
There is provided an integrated leaky feeder and mesh network system. The system includes a plurality of mesh nodes, each mesh node comprising a radio, at least one of the mesh nodes being powered by a power source. The system also includes a radiating coaxial cable connecting the plurality of mesh nodes to provide a leaky feeder signal between the nodes.