Distributed Antenna System Using Single Optical Cable
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Solution Overview
Problem
Existing distributed antenna systems face complexity and high costs when adding new infrastructure to existing installations, particularly in areas with weak or no signal, requiring integration of multiple communication signals across various networks.
Innovation Solution
A wireless communication system that integrates various types of communication signals using a single optical cable, employing a Head End connected to base stations and Remote Units through fiber optic cables, with frequency shifters and RF modules to manage and transmit signals efficiently, reducing the need for multiple installations and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations and antenna dispersion devices are installed in shaded areas to improve signal coverage, then signal quality is improved, but device complexity and installation cost increase
Solution Approach 1:
The patent combines multiple communication signals (mobile communication, public safety, Wi-Fi) into a single optical cable infrastructure. The Head End aggregates signals from multiple sources and transmits them through one fiber optic cable to Remote Units, eliminating the need for separate installations for each communication system and reducing overall device complexity while maintaining signal quality in shaded areas
Solution Approach 2:
The optical cable-based DAS system serves multiple functions simultaneously: it provides mobile communication signals, public safety signals, and Wi-Fi signals through a single infrastructure. The Head End and Remote Units are designed to handle multiple signal types, making the system universal and reducing the need for separate specialized installations
2Reliability
If multiple communication signals are transmitted through separate infrastructures to ensure signal quality, then communication reliability is improved, but installation cost and time increase
Solution Approach 1:
The patent merges multiple communication infrastructures into a single optical cable-based DAS. The Head End receives multiple signal inputs and combines them into unified optical signals that travel through one fiber optic cable to Remote Units, which then distribute all signal types locally. This consolidation dramatically reduces installation time compared to deploying separate infrastructures for each communication system
3Productivity
If additional installations are added to existing infrastructure to provide more data capacity, then data transmission capability is improved, but system complexity and cost increase
Solution Approach 1:
The optical cable-based DAS is designed with universal capability to handle multiple signal types and high data capacities. The Head End can aggregate signals from multiple sources including mobile communication, public safety, and Wi-Fi systems, transmitting them all through the same optical infrastructure. This allows existing installations to support increased data transmission requirements without adding complex separate systems
Solution Approach 2:
The system uses optical cable transmission which provides significantly higher bandwidth and data capacity compared to traditional electrical cable systems. By changing the transmission medium parameter from electrical to optical, the system can accommodate increased data transmission requirements and additional installations without proportionally increasing complexity
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 simplifies the integration of communication signals, reduces installation costs, and enables simultaneous transmission of multiple inputs and outputs, effectively addressing the challenge of providing reliable services in shaded areas without damaging existing infrastructure.
Implementation Method 1
A wireless communication system that integrates various types of communication signals using a single optical cable, employing a Head End connected to base stations and Remote Units through fiber optic cables
Data Source
AI summary
An integrated antenna distributed system incorporates various types of communication signals, such as mobile communication signals, public safety signals, Wi-Fi signals, and other types of communication signals. Such a system uses a single reference signal to support MIMO using a single optical cable or a single fiber optic cable, and a signal from a remote location, to support commercial telecommunication services and Wi-Fi services simultaneously. The reference signal is used for frequency stability of remote units (RUs) connected to the head end (HE). For example, a reference signal is selected and sent from the HE to RUs, a bandwidth and frequency conversion of signals to be transmitted is specified and/or performed, a RU receives the converted signals and the reference signal from the HE, where the converted signals may be frequency or band-constrained, and the converted signals are converted at the RUs back to their original frequencies or bands.