Migration Between Permanent and Switched Connections in Optical Networks
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Solution Overview
Problem
Current optical networks face challenges in dynamically reallocating resources between permanent and switched connections, leading to service disruptions and inefficiencies during migration, which is essential for adapting to growing data traffic and evolving network architectures.
Innovation Solution
A method for migrating between permanent and switched connections in a transmission network is implemented using the control plane, where messages are forwarded node by node via the control plane, utilizing signaling protocols like RSVP-TE or CR-LDP, allowing seamless transition without service interruption by converting cross-connections between management and control planes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If permanent connection is used in optical network, then design simplicity and low cost are achieved, but dynamic resource allocation and flexibility are lost
Solution Approach 1:
The patent introduces dynamic switching capability into the optical network by enabling connections to transition between permanent and switched states. The control plane allows real-time establishment and release of optical connections, transforming the static permanent connection model into a dynamic system that can adapt to changing traffic requirements while maintaining infrastructure simplicity.
2Adaptability or versatility
If switched connection is implemented for dynamic resource allocation, then network flexibility is improved, but system complexity increases due to control plane requirements
Solution Approach 1:
The patent segments the optical network into distinct functional planes: management plane for long-term resource allocation and control plane for real-time connection control. This segmentation allows the complex switching functionality to be isolated in the control plane while the data plane remains simple, enabling dynamic resource allocation without overwhelming system complexity.
Solution Approach 2:
The control plane acts as an intermediary between the management plane and the optical switching fabric. It translates high-level resource allocation policies into specific switching operations, mediating between complex management requirements and simple physical switching actions, thereby reducing overall system complexity.
3Adaptability or versatility
If migration between permanent and switched connections is performed traditionally, then resource reallocation is achieved, but service disruption occurs
Solution Approach 1:
The patent establishes a switched connection in advance as a backup path before migrating traffic from a permanent connection. This preliminary setup ensures that if the permanent connection is released, traffic can immediately switch to the pre-established switched connection without disruption, enabling safe resource reallocation.
Solution Approach 2:
The patent creates a protective mechanism by establishing a switched connection as a cushion before releasing the permanent connection. This cushion ensures service continuity during the migration process, allowing the system to reallocate resources from permanent to switched connections without causing service disruption or downtime.
Data Source
AI summary
This invention discloses a method for migration between a permanent connection and a switched connection in a transmission network. The method comprises the steps of: the ingress node of the current connection receiving a message of connection migrating request; forwarding the message of connection migrating request node by node starting from the ingress node in the direction of the traffic signal transmission of the current connection till the egress node of the current connection; making migration between the two connection modes until the ingress node after the message of migrating request has been received. By making migration between modes of connection node by node at each node of a transmission network, this invention ensures a smooth transition between a permanent connection and a switched connection, effectively avoiding service disruption while making the implementation of network services more flexible.