Reconfigurable Optical Access Network Architecture for Dynamic Resource Allocation
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Solution Overview
Problem
Current passive optical network (PON) systems face challenges in efficiently utilizing network resources and scaling bandwidth to meet increasing demand, as OLT resources are often confined to a single ODN, limiting their sharing and dynamic allocation across multiple ODNs.
Innovation Solution
Implementing a reconfigurable optical access network architecture that dynamically allocates OLT resources using tunable transmitters and cyclic arrayed waveguide gratings, allowing OLT resources to be shared across multiple ODNs within a sub-network, enabling point-to-point and point-to-multi-point connections, and adjusting bandwidth allocation based on traffic load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If OLT resources are confined to a single ODN, then resource allocation is simple and stable, but network resource utilization efficiency deteriorates and bandwidth scalability is limited
Solution Approach 1:
The patent implements dynamic resource allocation by making OLT resources movable between different ODNs based on traffic load conditions. The OLT can dynamically switch between serving a single ODN or multiple ODNs, transforming the static resource allocation into a dynamic system that adapts to changing network demands, thereby improving resource utilization without permanently increasing complexity.
Solution Approach 2:
The OLT is designed with multi-functionality to serve both single-ODN and multi-ODN configurations. By incorporating wavelength selective switches and tunable filters, the OLT can universally handle different service modes (point-to-point and point-to-multipoint), allowing the same resource to be shared across multiple ODNs when needed, thus improving overall network productivity.
2Adaptability or versatility
If OLT resources are dynamically allocated across multiple ODNs, then bandwidth and scalability are improved, but network architecture complexity increases
Solution Approach 1:
The patent segments the OLT into multiple functional modules including wavelength selective switches, tunable filters, and independent transmitter arrays. Each module can be independently configured and controlled, allowing the complex functionality to be divided into manageable segments. This modular segmentation enables bandwidth scalability while keeping the complexity of individual components manageable.
Solution Approach 2:
The patent introduces wavelength selective switches and tunable filters as intermediary components between the OLT and multiple ODNs. These intermediaries manage the complex wavelength routing and signal distribution, enabling the OLT to serve multiple ODNs dynamically without requiring direct complex connections to each ODN, thus improving adaptability while mediating the architectural complexity.
3Productivity
If fixed wavelength allocation is used, then network configuration is simple and stable, but network resource utilization efficiency deteriorates under varying traffic loads
Solution Approach 1:
The patent employs tunable filters and wavelength selective switches that can dynamically change wavelength parameters based on traffic load conditions. Instead of fixed wavelength allocation, the system can adjust wavelength assignments in real-time, improving resource utilization efficiency by matching wavelength capacity to actual traffic demands while maintaining operational simplicity through automated control.
Solution Approach 2:
The system implements feedback mechanisms that monitor traffic load conditions and automatically adjust wavelength allocation accordingly. This feedback loop allows the network to maintain optimal resource utilization without manual reconfiguration, balancing the need for high productivity with ease of operation by allowing the system to self-adjust based on real-time conditions.
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 flexibility and efficiency by allowing dynamic allocation of OLT resources, increasing bandwidth, and improving scalability, thereby supporting higher data rates and better utilization of network resources.
Implementation Method 1
cyclic arrayed waveguide grating (AWG) wavelength router
Data Source
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AI summary
An apparatus comprising a first tunable transmitter array comprising a first tunable transmitter and a second tunable transmitter and a cyclic array waveguide grating (AWG) wavelength router coupled to the first tunable transmitter array, wherein the cyclic AWG wavelength router comprises a plurality of input ports and a plurality of output ports, wherein the cyclic AWG wavelength router is configured to receive a first optical signal emitted from a first tunable transmitter via a first input port of the plurality of input ports, receive a second optical signal emitted from a second tunable transmitter via the first input port of the plurality of input ports, and route the first optical signal and the second optical signal to the output ports dependent on one or more wavelengths used to encode the first optical signal and the second optical signal.