Optical Fiber Distribution Unit for RF and Digital Data Services
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Solution Overview
Problem
Current optical fiber-based distributed communications systems face challenges in efficiently providing both digital data services and radio frequency (RF) communications services, particularly in distributing power to remote antenna units while maintaining high-bandwidth connectivity.
Innovation Solution
The system integrates interconnect units (ICUs) that distribute RF communication services, digital data services, and power over optical fibers, allowing for separate or combined transmission of digital data services with RF communication services, using head-end equipment and remote antenna units equipped with converters to manage electrical and optical signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If optical fiber is used to distribute communication signals, then bandwidth is increased, but power distribution capability is reduced
Solution Approach 1:
The patent combines optical fiber communication signals with power distribution by co-locating power sources at head-end units and using the same optical fiber infrastructure to deliver both data and power to remote antenna units, resolving the contradiction between high bandwidth and power distribution capability
Solution Approach 2:
The optical fiber system is designed to perform multiple functions simultaneously: distributing RF communication signals, distributing digital data services, and distributing electrical power to remote units, making the infrastructure universal and eliminating the need for separate power distribution systems
2Reliability
If digital data services and RF communication services are transmitted separately, then service reliability is improved, but system complexity increases
Solution Approach 1:
The patent segments services into distinct functional modules (RF communication services, digital data services, power distribution) that can be independently managed and transmitted through the same optical fiber infrastructure, maintaining reliability while reducing overall system complexity through modular design
Solution Approach 2:
The system uses a universal optical fiber transmission medium that can carry multiple service types simultaneously through wavelength division multiplexing and other techniques, eliminating the need for separate dedicated infrastructure for each service type
3Adaptability or versatility
If power is distributed to remote antenna units, then operational flexibility is improved, but energy loss increases
Solution Approach 1:
The patent replaces traditional electrical power distribution through copper wiring with optical fiber-based power transmission, using optical carriers that experience minimal signal loss over distance, thereby reducing energy loss while maintaining the ability to distribute power flexibly to remote units
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 configuration enables reliable and efficient delivery of both digital data and RF communications services to client devices, supporting high-bandwidth applications and flexible power distribution within optical fiber-based distributed communications systems.
Implementation Method 1
The remote antenna units convert incoming optical RF signals from an optical fiber downlink to electrical RF signals via optical-to-electrical (O/E) converters
Implementation Method 2
The remote antenna units then convert the electrical RF signals to optical RF signals via electrical-to-optical (E/O) converters
Data Source
AI summary
Methods and systems for distribution of digital data services, radio frequency (RF) communications services, and power are provided for use in optical fiber-based distributed communications systems. Electrical digital data signals are received at a distribution unit. Downlink digital data signals representing the electrical digital data signals are distributed from the distribution unit over a downlink digital data services line to a remote antenna unit (RAU). Uplink digital data signals are received from the RAU over an uplink digital data services line and are distributed to head-end equipment. The distribution unit also receives optical RF communications signals and distributes the optical RF communications signals over at least one RF communications services optical fiber to the RAU. Power is also distributed, from at least one power output of the distribution unit, over at least one power line to the RAU.