Software-Defined Tunnel Amplifiers for Remote Gain Control

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Solution Overview

Problem

Existing communication systems for railroad trains in tunnels face reliability issues due to shielded environments, requiring on-site technical personnel for setup, maintenance, and adjustments, which can lead to operational downtime.

Innovation Solution

A remotely-controlled distributed antenna system employing software-defined amplifiers (SDAs) that enables digital control and monitoring of amplifier performance parameters, allowing for remote setup and adjustments without physical presence inside the tunnel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If on-site technical personnel are deployed for setup, maintenance, and troubleshooting of tunnel communication systems, then system reliability is improved, but operational downtime increases and labor costs increase

Engineering Contradiction:

Improvesystem reliabilityVSAvoidoperational downtime

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system implements self-service through automated monitoring and diagnostic capabilities. The distributed antenna system includes monitoring equipment that continuously tracks system parameters and automatically detects faults, eliminating the need for manual inspection and reducing reliance on on-site technical personnel while maintaining system reliability

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces manual mechanical intervention with automated electronic monitoring and control systems. The system uses microprocessors, sensors, and communication networks to monitor amplifier performance, detect faults, and control system operations remotely, substituting the need for physical presence of technical personnel in the tunnel

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If on-site manual manipulation of amplifiers is required for parameter adjustments, then system adaptability is improved, but ease of operation deteriorates and safety risks increase

Engineering Contradiction:

Improveparameter adjustment capabilityVSAvoidease of operation

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The system introduces an intermediary control system that includes a control computer, communication network, and user interface. This intermediary layer allows operators to adjust amplifier parameters, switching states, and system configurations remotely without physically entering the tunnel, maintaining full adaptability while dramatically improving ease of operation

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The control system is segmented into multiple independent components: monitoring equipment distributed along the tunnel, centralized control computer, communication network, and user interface. This segmentation allows different functions to be performed independently and enables remote operation while maintaining system adaptability

Inventive Principle:

Principle #1Segmentation

3Ease of repair

If access to equipment inside active railroad tunnels is required, then ease of repair is improved, but productivity deteriorates due to track downtime

Engineering Contradiction:

Improveaccessibility of equipmentVSAvoidtrain operation productivity

Core Design Contradiction:

Ease of repairVSProductivity

Solution Approach 1:

The system performs self-diagnosis and self-monitoring through distributed sensors and monitoring equipment that continuously track amplifier performance, signal levels, and system health. Fault detection and diagnostic information are automatically transmitted to operators, enabling repair planning without interrupting train operations and maintaining productivity

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

A communication network acts as an intermediary, transmitting diagnostic data, control commands, and status information between the tunnel equipment and remote operators. This intermediary system enables full access to and control of equipment without requiring physical entry into the active tunnel, eliminating track downtime while maintaining ease of repair

Inventive Principle:

Principle #24Intermediary (Mediator)

4Reliability

If distributed antenna system with analog amplifiers is used, then radio coverage reliability is improved, but device complexity increases and ease of operation deteriorates

Engineering Contradiction:

Improveradio coverage reliabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system implements multi-functionality by integrating monitoring, control, and communication capabilities into a unified distributed antenna system. The same infrastructure that provides radio coverage also carries monitoring and control signals, eliminating the need for separate systems and reducing overall device complexity while maintaining reliability

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS10966100B2Remotely-controlled distributed antenna system for railroad tunnels employing software defined amplifiers

Publication Date: 2021.03.30 TUNNEL RADIO OF AMERICA INC

AI summary

An amplifier for a radio communications system in a shielded tunnel is disclosed. In one example, the amplifier comprises a processor configured to execute a plurality of modules comprising a gain control module and an attenuation control module. Methods and systems are further provided for controlling and monitoring amplifier characteristics.