RSVP-OSRP Interworking via Encapsulation Mapping
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Solution Overview
Problem
Current standards do not effectively address the interoperability between Resource Reservation Protocol (RSVP)-based external control plane protocols and internal control plane protocols like Optical Signaling and Routing Protocol (OSRP), leading to close linkage issues, costly enhancements, and potential control plane failures due to message-by-message and parameter-by-parameter mapping, as well as increased processing overhead from RSVP refresh messages.
Innovation Solution
Implement a high-level mapping method that encapsulates external control plane protocol messages within internal control plane messages, allowing them to be processed only at border nodes without intermediate processing, reducing coupling and overhead, and enabling efficient handling of RSVP refreshes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If message-by-message and parameter-by-parameter mapping is implemented from external control plane protocol to internal control plane protocol, then interoperability between RSVP-based external protocols and internal protocols is achieved, but device complexity and processing overhead increase significantly
Solution Approach 1:
The patent introduces an intermediary mapping layer that translates RSVP protocol messages to internal control plane protocol messages. This intermediary layer acts as a mediator between the external RSVP-based protocols and internal protocols, enabling interoperability without requiring direct complex mapping between all protocol elements. The intermediary handles protocol translation, allowing the internal protocol to remain relatively simple while still achieving external protocol compatibility.
Solution Approach 2:
The patent segments the protocol mapping function into distinct components: external protocol interface, mapping layer, and internal protocol interface. This segmentation allows each component to be developed and maintained independently, reducing overall system complexity. The mapping layer is further segmented to handle different message types and parameters separately, making the translation process more manageable and less error-prone.
2Adaptability or versatility
If detailed mapping of all protocol messages and elements is performed, then complete interoperability is achieved, but development and testing costs increase due to required protocol changes
Solution Approach 1:
The patent creates a universal mapping framework that can handle multiple RSVP message types and internal protocol variations through a common translation mechanism. This universal approach allows the same mapping infrastructure to serve different protocol combinations, reducing the need for separate development and testing for each protocol pair. The mapping layer is designed to be configurable and adaptable, enabling it to handle various message formats without requiring fundamental redesign.
3Reliability
If RSVP refresh messages are processed at intermediate nodes, then session management is maintained, but processing overhead and control processor usage increase
Solution Approach 1:
The patent extracts the RSVP refresh message processing function from intermediate nodes and concentrates it at the ingress and egress border nodes. This extraction removes the processing burden from intermediate nodes, allowing them to simply forward refresh messages without inspection or state maintenance. The border nodes, which have higher processing capability and session management responsibility, handle the actual refresh message processing, thereby maintaining session reliability while improving overall network processing efficiency.
4Adaptability or versatility
If internal control plane protocol is changed to accommodate new external protocol features, then protocol compatibility is maintained, but development time and potential for control plane failures increase
Solution Approach 1:
The patent creates a copy of the external protocol interface and mapping logic in the form of a standardized translation layer. Instead of modifying the internal protocol to match each new external feature, the system copies the external protocol's message structures and semantics into the mapping layer, where they can be translated to the internal protocol's existing structures. This copying approach allows the internal protocol to remain stable while still supporting new external protocol features through the translation layer.
Data Source
AI summary
The present invention provides improved methods and systems for interworking Resource Reservation Protocol (RSVP)-based external control plane protocols with internal control plane protocols, such as Optical Signaling and Routing Protocol (OSRP). The present invention utilizes only a high-level mapping in which a trigger is created in the internal control plane protocol to initiate the desired internal control plane action or vice versa. The external control plane protocol messages and fields are encapsulated as data in the internal control plane messages and fields and are processed only at the remote end of the internal domain. By encapsulating the entirety or parts of the external control plane protocol messages and fields ensures that necessary information is carried from an ingress border node to an egress border node. At the egress border node, the encapsulated external control plane protocol messages and fields are mapped back to the external control plane protocol, without having to make changes to the internal control plane protocol or perform processing at intermediate nodes.