Subscriber Optical Relay With Wavelength Monitoring for Low-Latency Routing
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Solution Overview
Problem
Existing optical access systems face delays due to the conversion of optical signals to electrical signals in optical line terminals (OLTs), leading to reduced quality of service, especially when data volume increases, and there is a need to relay optical signals directly from customer premises equipment (CPE) to their intended destinations without intermediate conversion.
Innovation Solution
A subscriber device with an optical switch and control unit that allocates and manages wavelengths, polarized waves, modes, codes, frequencies, and core wires to relay optical signals to their intended destinations, using filters to block signals that do not meet the allocated conditions, and a monitoring unit to ensure compliance with these settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If optical signals are converted to electrical signals in OLT for processing, then routing and control functions can be performed, but communication delay increases and service quality deteriorates
Solution Approach 1:
The patent replaces the traditional optical-to-electrical conversion and electronic routing system with an all-optical routing system. The optical switch uses optical control signals to directly route optical signals without conversion to electrical domain, substituting electronic control mechanisms with optical control mechanisms, thereby eliminating conversion delays and achieving low-latency optical packet switching
Solution Approach 2:
The patent introduces an optical switch as an intermediary device between the optical line terminal and the optical network unit. This optical switch receives optical control signals from the OLT and uses them to route optical signals from different wavelengths to appropriate output ports, acting as an optical mediator that enables routing functionality without electrical conversion
2Productivity
If multiple services are accommodated in one optical access system, then network efficiency improves, but signal management complexity increases
Solution Approach 1:
The patent implements a universal optical access system that can simultaneously accommodate multiple services including broadband Internet, voice, and video through a single optical network infrastructure. The optical switch is designed to handle multiple wavelengths and service types uniformly, providing multi-functional capability that improves network efficiency while managing complexity through standardized optical processing
Solution Approach 2:
The patent uses wavelength division multiplexing where different services are assigned to different optical wavelengths. The optical switch routes signals based on wavelength parameters, allowing multiple services to be managed simultaneously by changing the wavelength parameter rather than requiring separate physical paths, thereby improving efficiency while maintaining manageable complexity
3Adaptability or versatility
If optical signals from CPE are terminated and converted by ONU, then integration with optical network is achieved, but the original optical signal cannot be used directly
Solution Approach 1:
The patent replaces the traditional termination and conversion process at the ONU with a direct optical relay approach. The optical switch relays optical signals from the CPE through the optical network without converting them to electrical signals, substituting the conversion mechanism with direct optical transmission while maintaining network integration through optical switching control
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 enables direct optical signal relay without conversion, reducing delays and improving service quality by ensuring signals are correctly routed to their destinations, thus enhancing the efficiency and reliability of optical communication systems.
Implementation Method 1
a filter configured to transmit, in an optical signal transmitted from the user device, an optical signal satisfying a condition set in accordance with the information allocated by the control unit. The filter filters and blocks an optical signal transmitted from the user device when the optical signal is different from information allocated from the control unit.
Data Source
AI summary
A subscriber device in an optical communication system including a subscriber device, a user device connected to the subscriber device, an optical switch that relays an optical signal transmitted from the subscriber device to a destination device, a wavelength control unit that allocates a wavelength to the subscriber device, and an optical switch control unit that controls the optical switch such that the optical signal transmitted from the subscriber device is output to another port connected to a transmission line corresponding to a transfer destination on a path to the destination device. The subscriber device includes a wavelength monitoring unit that monitors a wavelength of the optical signal transmitted from the user device and a transceiver that transmits and receives the optical signal to and from another device. The wavelength monitoring unit instructs the user device to use an appropriate wavelength when the wavelength of the optical signal transmitted from the user device is different from the wavelength allocated by the wavelength control unit. When the wavelength of the optical signal transmitted from the user device is identical to the wavelength allocated by the wavelength control unit, the subscriber device transmits the optical signal through the optical switch.