Optical Connection Hitless Bandwidth Resizing
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Solution Overview
Problem
Current optical transport networks face inefficiencies in dynamically resizing connection bandwidth to meet varying data traffic demands, leading to wasted network capacity and service disruptions.
Innovation Solution
The implementation of a signaling message protocol within the GMPLS framework that allows for dynamic resizing of optical connections by transmitting information about spectral portions and unreserved slices, enabling the adjustment of available optical signals without disrupting ongoing data traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic bandwidth resizing is implemented in optical transport networks, then network capacity utilization is improved, but service disruption and degradation of spectral slices occur
Solution Approach 1:
The optical connection is segmented into multiple spectral slices that can be independently managed. The resizing operation selectively targets only the unselected spectral slices for bandwidth adjustment, while the selected spectral slices continue to carry data traffic without disruption. This segmentation allows partial modification of the connection without affecting the entire service flow.
Solution Approach 2:
The patent implements dynamic bandwidth resizing by allowing the optical connection to adapt its spectral allocation in real-time based on traffic demands. The system transitions from static bandwidth allocation to dynamic adjustment, enabling the network to respond to changing conditions while maintaining service continuity through coordinated resizing of selected and unselected spectral slices.
2Adaptability or versatility
If bandwidth resizing is performed on optical connections, then adaptability to traffic demands is improved, but harmful effects are generated on non-selected spectral slices
Solution Approach 1:
The resizing operation applies local quality changes only to the unselected spectral slices that require bandwidth adjustment, while maintaining the original characteristics of the selected spectral slices. This localized modification ensures that only the necessary portions of the connection are altered, preventing harmful effects from propagating to the entire optical connection including the spectral slices carrying active data traffic.
Solution Approach 2:
The system performs preliminary identification and selection of spectral slices before executing the resizing operation. By pre-selecting which spectral slices should be resized and which should remain unchanged, the system prepares the connection for selective modification, ensuring that data-carrying spectral slices are protected from degradation before the actual resizing takes place.
Data Source
AI summary
A method and system are disclosed in which a signaling message conforming to a GMPLS signaling protocol and associated with an optical connection is generated and transmitted by a transmit node to a receive node to change the size of a connection bandwidth in a network. The message may include information indicative of a number of spectral portions which correspond to frequencies of selected ones of the plurality of optical signals, selected ones of the plurality of optical signals being available to carry data from the transmit node to the receive node; and information indicative of a change in the number of selected ones of the plurality of optical signals. The transmit node may resize the connection while data traffic continues to be transmitted over the connection in the Optical Transport Network without service disruption to the client attached to the connection being resized.