H-VPLS Pseudo Wire Redundancy for Seamless Mobile Handover
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Solution Overview
Problem
Current technologies lack an effective solution for seamless handover of communication services in MPLS-TP networks, particularly for mobile platforms like trains moving between stations, which experience disruptions in network connectivity and quality.
Innovation Solution
Implementing a method that uses H-VPLS and Pseudo Wire Redundancy to maintain Layer-2 communication services by establishing and switching between multiple network gateways, ensuring continuous communication through redundant Ethernet radio links, with decision-making based on pre-defined criteria such as connection quality and priority rules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If handover is implemented in MPLS-TP networks for mobile platforms, then communication service continuity is improved, but network complexity and implementation difficulty increase due to lack of standardized protocols
Solution Approach 1:
The patent segments the handover functionality into distinct components: mobile platform identifier management, gateway selection logic, and Layer-2 service routing. This segmentation allows each component to be independently implemented and managed, reducing overall system complexity while maintaining service continuity during handover between gateways
Solution Approach 2:
The patent implements preliminary action by pre-configuring multiple communication links between the mobile platform and multiple network gateways before handover is needed. The mobile platform is pre-assigned identifiers and link configurations are established in advance, enabling seamless switching when the mobile platform moves between service areas without requiring complex real-time decision-making
2Reliability
If multiple communication links are established for handover redundancy, then network resilience is improved, but resource consumption and system complexity increase
Solution Approach 1:
The patent applies partial action by establishing multiple communication links between the mobile platform and multiple network gateways, but only activating the necessary number of links based on actual movement and service requirements. This allows the system to maintain resilience through redundant links while avoiding the resource overhead of maintaining all possible links simultaneously, enabling graceful degradation of redundancy based on network conditions
Data Source
AI summary
A method and apparatus are described for providing communication services to a mobile platform while moving, wherein the mobile platform communicates along two current communication links extending between the mobile platform and two network gateways. The method comprises: setting an H-VPLS service to enable provisioning of L2 services to the moving platform via at least one of the two current communication links; enabling the moving platform to exchange communications along one or both communication links; replacing one of the two current communication links while the mobile platform is moving, with another communication link extending towards a third network gateway, by using Pseudo Wire Redundancy (PWR) to re-route traffic from the communication link being replaced to the other communication link, thereby allowing the moving platform to continue provisioning the L2 services while communicating with two network gateways, being the third network gateway and one of the former two network gateways.