Distributed Antenna System with Cascaded Band Processing
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Solution Overview
Problem
Distributed antenna systems face challenges in managing complexity, flexibility, and cost efficiency, particularly in extending coverage and adapting to changes in operational environments, due to increased design complexity and rising installation and operation costs.
Innovation Solution
A distributed antenna system architecture that includes a headend device for combining and converting downlink RF signals into optical signals, main remote devices with cascaded band processing units for amplification, and sub-remote devices for further signal amplification, enabling easy management of service abnormalities and environmental changes while minimizing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the number of remote devices is increased to extend coverage, then coverage area is improved, but installation and operation costs are increased
Solution Approach 1:
The patent combines multiple band processing units into a single main remote device, eliminating the need for separate remote devices for each band. This merging approach extends coverage across multiple frequency bands while reducing the total number of devices, installation points, and associated costs.
Solution Approach 2:
The main remote device is designed with multi-functional band processing units that can handle multiple frequency bands simultaneously. This universal design allows a single device to perform the functions of multiple specialized devices, reducing system complexity and cost while maintaining broad coverage.
2Adaptability or versatility
If the design complexity of headend device and remote device is increased to support neutral host architecture, then service versatility is improved, but ease of operation is deteriorated
Solution Approach 1:
The patent segments the complex neutral host functionality into independent, modular band processing units. Each unit handles a specific frequency band, making the system easier to manage and operate while maintaining the versatility to support multiple providers and services through the headend device.
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 architecture enhances operational convenience, flexibility, and scalability, allowing for broad coverage extension while reducing installation and operation costs by simplifying the management of service changes and minimizing equipment additions.
Implementation Method 1
a headend device configured to generate a downlink transmission signal by combining a plurality of downlink RF signals in different frequency bands, received from a plurality of base stations, and convert the downlink transmission signal into a downlink optical signal
Implementation Method 2
a main remote device configured to receive the downlink optical signal from the headend device, convert the downlink optical signal into the downlink transmission signal, and amplify the plurality of downlink RF signals included in the downlink transmission signal
Implementation Method 3
the plurality of main-side band processing units each amplifying a downlink RF signal in a corresponding frequency band among the plurality of downlink RF signals included in the downlink transmission signal
Data Source
AI summary
A distributed antenna system includes a headend device for generating a downlink transmission signal by combining a plurality of downlink RF signals in different frequency bands, received from a plurality of base stations, and converting the downlink transmission signal into a downlink optical signal, a main remote device for receiving the downlink optical signal from the headend device, converting the downlink optical signal into the downlink transmission signal, and amplifying the plurality of downlink RF signals included in the downlink transmission signal, and a sub-remote device for receiving the downlink transmission signal distributed from the main remote device, and amplifying the plurality of downlink RF signals included in the received downlink transmission signal.