Optically-Switched Fiber Optic Communication System for Protocol-Independent RoF Links
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Solution Overview
Problem
Traditional wired and wireless peer-to-peer communication systems face limitations in range and coverage, requiring complex amplification and denser antenna deployments, and are restricted by regulatory and proprietary protocol constraints.
Innovation Solution
The implementation of an optically-switched fiber optic communication system that uses a head-end unit with an optical switch bank to dynamically establish Radio-over-Fiber (RoF) links between remote access points, enabling communication across different cellular coverage areas through a network of fiber optic cables, which is nearly protocol transparent and supports high-bandwidth, low-loss transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If traditional wired peer-to-peer communication is used to extend range, then communication distance increases, but system complexity increases due to complicated amplifying and repeating requirements
Solution Approach 1:
The patent introduces an optical fiber network as an intermediary medium to transmit RF signals between remote units and head-end stations. This optical intermediary eliminates the need for complex electrical amplification and repetition, as the optical signals can travel long distances without degradation, thereby extending communication range while reducing system complexity
Solution Approach 2:
The patent replaces traditional electrical signal transmission and amplification mechanisms with optical signal transmission. By converting RF signals to optical signals for transmission over fiber optics, the system eliminates the need for complex electrical amplifying and repeating infrastructure, achieving extended range with simpler architecture
2Area of stationary object
If wireless coverage is extended by denser antenna deployment, then coverage area increases, but infrastructure complexity and cost increase
Solution Approach 1:
The patent divides the wireless coverage area into multiple picocells, each served by a remote unit connected via optical fiber. This segmentation allows coverage to be extended by adding individual picocells rather than densifying the entire antenna network, reducing overall infrastructure complexity while maintaining broad coverage
Solution Approach 2:
The patent transitions from traditional two-dimensional wireless antenna deployment to a three-dimensional architecture by introducing the optical fiber dimension. Remote units are distributed throughout the coverage area and connected via optical fibers to head-end stations, allowing coverage extension without increasing antenna density in any given area
3Length of stationary object
If transmitted power is increased to extend wireless coverage, then coverage range increases, but energy consumption and regulatory constraints are violated
Solution Approach 1:
The patent uses optical fiber as an intermediary transmission medium that enables long-distance signal carrying without requiring high transmitted power. The optical signals can travel through fibers over extended distances with minimal loss, allowing coverage extension while maintaining low power consumption at the wireless transmission level
4Reliability
If proprietary protocols are used in communication systems, then system reliability improves, but adaptability to different applications and devices decreases
Solution Approach 1:
The patent creates a universal optical transmission infrastructure that can carry multiple different RF signals and protocols simultaneously. The optical fiber network and remote units are designed to be protocol-agnostic, allowing different wireless standards and proprietary protocols to coexist on the same physical infrastructure, thereby achieving both reliability through protocol compliance and adaptability through protocol independence
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 solution extends peer-to-peer communication range across entire indoor areas, supports various applications without infrastructure upgrades, and allows for videoconferencing and broadcast capabilities, while being independent of proprietary protocols and regulatory constraints.
Implementation Method 1
The optical switch bank is configured to dynamically establish a RoF-based optical link over at least one of the plurality of fiber optic cables
Implementation Method 2
A plurality of fiber optic cables, each of the plurality of fiber optic cables comprising at least one optical fiber, are configured to carry a Radio-over-Fiber (RoF) signal from the HEU to a plurality of remote access points
Data Source
AI summary
A switched wireless system is used to increase the range of peer-to-peer communications. The optically-switched fiber optic communication system includes a head-end unit (HEU) having a switch bank. Cables couple the HEU to one or more remote access points in different coverage areas. The switch bank in the HEU provides a link between the remote access points in the different coverage areas such that devices in the different cellular coverage areas communicate with each other, such as through videoconferencing. By using the switched communication system, the range and coverage of communication between devices may be extended such that devices in different coverage areas and devices using different communication protocols can communicate.