Statistical Multiplexing ODUflex OTN DWDM Bandwidth Adaptation
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Solution Overview
Problem
Current Optical Transport Network (OTN) and Wave Division Multiplexing (WDM) technologies at Layers 1 and 0 struggle to adapt to demand uncertainties and do not support over-subscription, leading to static allocation of bandwidth and inability to respond to changing communication demands.
Innovation Solution
Implementing statistical multiplexing with Optical channel Data Unit flex (ODUflex) and flexible spectral grids (Flex Grid) to enable dynamic resizing and over-subscription of ODUflex connections, using adaptive prediction algorithms and max-flow routing criteria to manage bandwidth and detect congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If statistical multiplexing is implemented with ODUflex at Layer 1 and Flex Grid at Layer 0, then network adaptability and resource utilization improve, but system complexity and control mechanisms increase
Solution Approach 1:
The patent implements dynamic bandwidth allocation by enabling ODUflex connections to resize their bandwidth dynamically based on actual traffic demands. The system transitions from static TDM-style allocation to dynamic statistical multiplexing, where bandwidth is allocated on-demand rather than pre-assigned. This allows the network to adapt to changing traffic patterns while maintaining manageable complexity through standardized protocols.
Solution Approach 2:
The patent changes the fundamental parameter of bandwidth allocation from fixed to variable. By introducing ODUflex with resizable bandwidth capabilities and Flex Grid at Layer 0, the system allows bandwidth parameters to be adjusted dynamically. This parameter change enables statistical multiplexing where the same physical infrastructure can support varying bandwidth requirements across different connections and time periods.
2Stability of the object's composition
If fixed bandwidth allocation is used in OTN and WDM networks, then network stability and predictability are maintained, but network utilization and responsiveness to demand changes deteriorate
Solution Approach 1:
The patent introduces dynamic bandwidth adjustment capabilities while maintaining network stability through controlled resizing mechanisms. ODUflex connections can dynamically resize their bandwidth allocations based on actual traffic demands, allowing the network to respond to changing conditions. The Flex Grid architecture at Layer 0 provides the underlying flexibility to support these dynamic changes while maintaining overall network stability through standardized protocols and controlled adjustment processes.
Solution Approach 2:
The patent enables the network to self-adjust bandwidth allocations based on actual traffic patterns. Through statistical multiplexing and adaptive bandwidth management, the system automatically allocates and reallocates bandwidth resources without requiring manual intervention. This self-service capability allows the network to optimize its own utilization while maintaining stability through automated control mechanisms.
3Productivity
If over-subscription is enabled through statistical multiplexing, then bandwidth efficiency and resource optimization improve, but congestion management and control complexity increase
Solution Approach 1:
The patent implements feedback mechanisms through adaptive prediction algorithms that continuously monitor traffic patterns and bandwidth utilization. These algorithms analyze historical and real-time data to predict future bandwidth requirements and adjust allocations accordingly. The feedback loop enables the system to manage congestion proactively by anticipating demand changes and reallocating resources before bottlenecks occur, thereby maintaining bandwidth efficiency while controlling management complexity through automated decision-making.
Solution Approach 2:
The patent employs preliminary action through adaptive prediction algorithms that forecast future bandwidth requirements based on historical traffic patterns. By predicting demand changes before they occur, the system can proactively allocate bandwidth resources and prevent congestion rather than reacting to it. This preliminary action allows over-subscription to be maintained efficiently while simplifying congestion management through advance planning and automated resource adjustment.
4Ease of manufacture
If static allocation of bandwidth is used in OTN and WDM, then implementation simplicity and ease of deployment are maintained, but network responsiveness and adaptability to changing demands deteriorate
Solution Approach 1:
The patent transitions the network from static to dynamic bandwidth allocation while maintaining ease of deployment through standardized protocols and automated management. ODUflex connections enable dynamic resizing capabilities, and the Flex Grid architecture provides the underlying flexibility. The system maintains deployment simplicity by using established OTN and WDM frameworks with added dynamic capabilities, avoiding complete system redesign while enabling network responsiveness to changing demands.
Solution Approach 2:
The patent introduces multi-functionality by enabling the same OTN and WDM infrastructure to operate in both static and dynamic modes. The ODUflex and Flex Grid additions provide universal compatibility with existing networks while enabling advanced dynamic bandwidth allocation. This multi-functionality allows the network to maintain ease of deployment through standardized interfaces while simultaneously gaining adaptability and responsiveness to changing traffic patterns.
Data Source
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AI summary
A method includes profiling user-network interface (UNI) ports including Optical channel Data Unit flex (ODUflex) in a network; and adapting, using a max-flow routing criterion, network-network interface (NNI) ports comprising ODUflex based on the profiling. A network includes a plurality of network elements; a plurality of links interconnecting the plurality of network elements, wherein the plurality of links includes Layer 0 Dense Wave Division Multiplexing (DWDM) bandwidth and Layer 1 Optical Transport Network (OTN) bandwidth; and a control plane operating between the plurality of network elements; wherein the Layer 0 DWDM bandwidth and the Layer 1 OTN bandwidth is statistically multiplexed using the control plane and manager based on monitoring bandwidth usage thereon over time.