Network Node Connectivity Supervision for IP Telecommunication Failure Handling
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Solution Overview
Problem
Current failure handling mechanisms in IP-based telecommunication networks are inadequate for managing connectivity failures between host nodes and router interfaces, particularly in complex topologies, leading to data loss and incomplete failure resolution.
Innovation Solution
A network node configured to host multiple connectivity supervision sessions, determining the state of overlapping sessions and adapting the communication system to detect and resolve connectivity failures by modifying session paths and associating identification information between network interfaces, thereby ensuring continuous availability and improved data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If VRRP protocol is used for connectivity supervision, then failure handling of router failures is improved, but it does not work well in topologies with redundant Ethernet switches and cannot handle host node failures
Solution Approach 1:
The patent implements a universal connectivity supervision mechanism that works across multiple topologies (including redundant Ethernet switch configurations) and handles both router failures and host node failures, making the system adaptable to various network architectures unlike VRRP which is router-specific
2Measurement precision
If BFD protocol is used for connectivity supervision, then detection of connectivity failures is improved, but no failure resolution is executed
Solution Approach 1:
The patent combines failure detection (from BFD) with failure resolution mechanisms into a single integrated system. When a connectivity failure is detected, the system automatically resolves it by selecting an alternative session path, eliminating the gap between detection and resolution that exists in pure BFD implementations
3Reliability
If SCTP protocol is used for connectivity supervision, then session path diversity is provided, but availability of session path diversity may not be supported in large IP networks
Solution Approach 1:
The patent segments the connectivity supervision into multiple independent sessions, each monitoring a different path. This allows the system to provide session path diversity similar to SCTP while maintaining simpler network operations, as each session can be managed independently without requiring complex network-wide coordination
4Reliability
If multiple connectivity supervision sessions are hosted towards multiple router interfaces, then comprehensive failure detection is achieved, but determining and adapting to overlapping session states becomes complex
Solution Approach 1:
The patent implements a feedback mechanism where the state of each connectivity supervision session is continuously monitored and fed back to the session manager. When a failure state is detected in any session, the system automatically adapts by selecting alternative paths, creating a closed-loop control system that manages multiple sessions without requiring complex manual configuration
Data Source
AI summary
A network node (800) is configured for hosting a plurality of connectivity supervision sessions (810a-e) towards a plurality of router interfaces (808a, b) in a communication system (801). The network node (800) comprises a determining unit configured for determining a state of at least two connectivity supervision sessions (810a-e) of the plurality of connectivity supervision sessions (810a-e), wherein the at least two connectivity supervision sessions (810a-e) are at least partially overlapping, and an adapting unit configured for adapting the communication system (101, 801, 901) based on the determined states of the at least two connectivity supervision sessions (810a-e).