Ring-Shaped Optical Transmission Path for Bandwidth Utilization
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Solution Overview
Problem
Optical telecommunications networks in wavelength division multiplex mode face inefficiencies in data transmission bandwidth utilization due to disjoint routing requirements, leading to underutilization of available bandwidth and increased recovery times in the event of fiber breaks.
Innovation Solution
Implementing a ring-shaped closed optical transmission path with overlapping and disjunctive signal paths to enable parallel data routing in normal operation, allowing for higher bandwidth utilization and rapid switching to backup paths in case of errors, using flexible transponders and reconfigurable optical add/drop nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If disjoint routing is used for data transmission between network elements and higher-level network nodes, then network reliability is improved through backup paths, but bandwidth utilization deteriorates due to underutilization of available bandwidth
Solution Approach 1:
The patent implements dynamic path selection where the routing configuration changes based on operational status. In normal operation, overlapping signal paths are used for both connections to maximize bandwidth utilization. Upon detecting a fiber break or path failure, the system dynamically switches to using disjoint backup paths, thus maintaining reliability while optimizing bandwidth under different conditions.
Solution Approach 2:
The system changes the routing parameter (path selection) based on operational conditions. During normal operation, the routing configuration allows overlapping paths to be used, maximizing bandwidth utilization. When a fault is detected, the routing parameter is changed to use disjoint backup paths, ensuring network reliability while adapting to the changed conditions.
2Reliability
If disjoint routing with separate backup paths is used for each connection, then fault isolation is improved, but recovery time deteriorates due to extensive recalculations required at the Internet protocol layer
Solution Approach 1:
The patent pre-configures overlapping signal paths and backup routes during the network design phase. The routing information and path selections are prepared in advance, stored in the network elements. When a fault occurs, the system can immediately switch to pre-determined backup paths without requiring extensive real-time recalculations, thus reducing recovery time while maintaining fault isolation.
Solution Approach 2:
The system skips the time-consuming Internet protocol layer recalculations by implementing optical layer protection switching. The pre-configured backup paths allow the system to bypass the need for extensive routing protocol convergence and recalculations, rushing through the recovery process by directly switching to backup paths at the optical layer.
Data Source
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AI summary
A method for more efficient data transmission in an optical telecommunications network using wavelength division multiplexing (WDM) of different optical wavelengths is described, wherein the optical telecommunications network comprises a first higher-level network node, a second higher-level network node, and further, a plurality of network elements, wherein the plurality of network elements comprises at least a first network element and a second network element, wherein the telecommunications network comprises an optical transmission link, wherein the optical transmission link directly or indirectly connects the first higher-level network node and the first network element, as well as the first network element and the second network element, and further, the second network element and the second higher-level network node.wherein the optical transmission path also connects the first higher-level network node and the second higher-level network node, so that the optical transmission path is topologically closed in a ring, wherein the closed-loop optical transmission path connects the first network element to the first higher-level network node at least indirectly, either via a first signal path or via a second signal path, and wherein the closed-loop optical transmission path connects the first network element to the second higher-level network node at least indirectly, either via a further first signal path or via a further second signal path, wherein the first signal path and the further first signal path overlap at least in a first sub-area of the optical transmission path.wherein the second signal path and the further second signal path overlap at least in a second sub-section of the optical transmission link, wherein both the first and second signal paths and the further first and further second signal paths are disjoint from each other and complement each other to form the optical transmission link, wherein in a normal operating mode of the optical telecommunications network, data transmission is carried out on the first signal path of the optical transmission link between the first network element on the one hand and the first higher-level network node on the other, and on the further first signal path of the optical transmission link between the first network element and the second higher-level network node (dual homing). (Figure 1)