OTN Tag Forwarding for MPLS Layer Removal
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Solution Overview
Problem
The existing bearer network architecture faces challenges with router capacity and power consumption limitations, especially with the increasing demand for service traffic, and the complexity and cost of maintaining dual-layer networks using WDM/OTN and MPLS technologies.
Innovation Solution
Implementing a service transmission method that allows direct dynamic forwarding in the OTN layer, using tag information to query forwarding information and forward OTN signal frames, thereby reducing the need for MPLS plane hardware and simplifying maintenance and administration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If MPLS switches are used to replace routers in core node devices, then processing simplicity and integration level are improved, but device complexity and maintenance complexity increase due to dual-layer network architecture
Solution Approach 1:
The patent extracts and removes the MPLS layer from the network architecture, keeping only the OTN layer for service transmission. This eliminates the need for dual-layer processing (OTN + MPLS) and reduces device complexity while maintaining the processing simplicity benefits of label switching
Solution Approach 2:
The patent makes the OTN layer universally capable of performing both transmission and switching functions that previously required separate MPLS infrastructure. By enabling direct service forwarding in the OTN layer using tag information, the system eliminates the need for dedicated MPLS plane hardware
2Use of energy by stationary object
If MPLS switches are used to replace routers, then power consumption is reduced, but maintenance and administration costs increase due to dual-plane management
Solution Approach 1:
The patent removes the MPLS plane from the network architecture, eliminating the need to maintain and administer dual planes (OTN and MPLS). This reduces maintenance complexity while preserving the power consumption benefits of MPLS-like label switching in the OTN layer
3Productivity
If router capacity is increased to handle growing service traffic, then network capacity is improved, but device size and power consumption increase
Solution Approach 1:
The patent replaces traditional router-based IP forwarding with OTN layer service transmission using tag information. This substitution enables large-capacity service transmission without proportionally increasing power consumption, as the OTN layer operates more efficiently for this purpose
Data Source
AI summary
Embodiments of the present disclosure disclose a service transmission method and a device and a system for implementing the method. The method includes: recognizing a type of a received client service, encapsulating an OTN service, and generating an OTN signal frame or a lower order ODU; querying a tag forwarding base to acquire forwarding information of the OTN signal frame or the lower order ODU; acquiring tag information, and inserting the tag information into an overhead of the OTN signal frame or the lower order ODU; and forwarding the OTN signal frame according to the forwarding information. Therefore, in the embodiments of the present disclosure, the forwarding and the transmission of the service may be performed in an OTN plane only, thereby reducing hardware modules of an MPLS plane.