Optical Burst Switched Network Nodes with RF Modulation
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Solution Overview
Problem
Current packet handling networks face inefficiencies due to electronic processing and lack of flexibility in managing bursty packet traffic, which can lead to network congestion and reduced performance.
Innovation Solution
The implementation of optical burst switched networks with optical nodes that use fixed wavelength transmitters with RF modulation to identify destination nodes, allowing for direct optical packet processing, avoiding centralized scheduling, and enabling any-node-to-any-node packet transmission without packet collisions or impacting optical amplifier performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electronic processing is used for packet handling, then device complexity is reduced, but network efficiency and flexibility deteriorate due to inability to process data packets optically
Solution Approach 1:
The patent replaces electronic processing with optical processing by using optical burst switches that directly manipulate optical signals without converting to electrical domain. Optical carriers modulated with packet data are switched and routed entirely in the optical domain, eliminating electronic processing bottlenecks and enabling higher network efficiency while maintaining manageable device complexity through optical switching mechanisms.
Solution Approach 2:
The patent changes the fundamental operating parameter from electronic domain to optical domain. By using optical carriers with specific wavelengths and modulation schemes, the system achieves higher bandwidth and faster processing speeds. The optical signals carry packet information through variations in intensity, frequency, or phase, enabling efficient packet handling without electronic conversion.
2Adaptability or versatility
If centralized scheduling is used for packet transmission, then device complexity is reduced, but network flexibility deteriorates and packet collisions occur
Solution Approach 1:
The patent implements self-service through distributed scheduling where each optical burst switch autonomously makes routing decisions based on local information. Nodes independently select available wavelengths and time slots for packet transmission without centralized coordination, enabling network flexibility and adaptability while avoiding packet collisions through decentralized conflict resolution mechanisms.
Solution Approach 2:
The patent introduces dynamic wavelength allocation and adaptive routing where optical carriers can switch wavelengths and routes based on real-time network conditions. This dynamic behavior allows the network to adapt to varying traffic demands and avoid congestion without requiring complex centralized scheduling, with each node making real-time decisions based on current availability.
3Productivity
If optical processing is implemented for packet handling, then network efficiency is improved, but device complexity increases due to need for optical nodes and modulation components
Solution Approach 1:
The patent achieves universality by designing optical burst switches that can handle multiple packet types, wavelengths, and routing scenarios with a single platform. The optical nodes are designed to perform multiple functions including wavelength conversion, packet switching, routing, and collision avoidance, reducing the need for specialized components for each function and managing overall device complexity while maintaining high packet processing speed.
4Ease of manufacture
If fixed wavelength transmitters with RF modulation are used, then manufacturing cost is reduced, but information capacity is limited
Solution Approach 1:
The patent adds another dimension to data transmission by using RF modulation on top of optical carriers. This creates a hierarchical modulation structure where optical carriers provide the base transmission medium and RF modulation adds an additional layer for encoding packet information and destination identification. This dimensional addition increases data transmission capacity while keeping the fixed wavelength transmitter design simple and cost-effective.
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 approach enhances network efficiency and flexibility by enabling direct optical packet processing, reducing congestion, and maintaining network performance across varying traffic demands through explicit destination node identification and low-cost RF modulation.
Implementation Method 1
each include a fixed wavelength transmitter
Implementation Method 2
modulation is applied to the transmitter output signals based on the destination node to which the output signals are being sent
Implementation Method 3
transmit bursts of packets via optical wavelengths over optical fiber
Data Source
AI summary
An optical node includes a wavelength splitter configured to split optical signals comprising multiple optical wavelengths into separate outputs, with each of the separate outputs having a different wavelength. The optical node further includes a detector configured to detect optical signals associated with packets at each of the separate outputs, and determine a modulation applied to the optical signals at each of the separate outputs. The optical node also includes a processing unit configured to identify destination optical nodes for the packets based on the determined modulation.