Virtual Home Agent Multi-Link Routing Optimization
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Solution Overview
Problem
Current Mobile IP technologies face inefficiencies in routing data packets as a Mobile Node roams further from its home network, leading to increased inefficiency in maintaining internet connectivity.
Innovation Solution
Implementing a Service Provider network with a virtual Home Agent for each enterprise network, allowing for efficient packet routing by designating a primary and secondary Home Agent role based on registration requests and maintaining mobility binding tables to manage packet forwarding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a Mobile Node roams further from its home network, then mobility coverage is expanded, but packet routing efficiency deteriorates
Solution Approach 1:
The patent segments the Home Agent function into multiple instances distributed across different networks. Each Home Agent instance serves a specific region or network segment, allowing Mobile Nodes to be served by a Home Agent physically closer to them, thereby reducing routing distance and improving packet routing efficiency while maintaining broad mobility coverage.
Solution Approach 2:
The patent introduces intermediate Home Agents that act as mediators between the Mobile Node and the original home network. These intermediate Home Agents forward packets through optimized paths, reducing the inefficiency of direct long-distance routing while maintaining connectivity to the home network, thus resolving the contradiction between roaming distance and routing efficiency.
2Device complexity
If a single Home Agent is used for all enterprise networks, then device complexity is reduced, but routing optimization capability deteriorates
Solution Approach 1:
The patent implements a universal Home Agent framework that can serve multiple enterprise networks through a standardized interface. The Home Agent maintains a binding table that can store information about multiple enterprise networks and Mobile Nodes, enabling it to perform optimized routing for different networks without requiring separate complex configurations for each network, thus achieving both simplicity and optimization capability.
3Reliability
If packets are routed through the home network for external communication, then connectivity is maintained, but latency increases
Solution Approach 1:
The patent implements preliminary action by having the Mobile Node register its current location with the Home Agent before data transmission occurs. The Home Agent pre-establishes the optimal routing path and updates its binding table with the Mobile Node's current care-of address. This preliminary location registration and path establishment allows packets to be forwarded directly to the Mobile Node's current location without requiring them to traverse the entire home network path, thus maintaining connectivity while reducing latency.
Data Source
AI summary
The disclosed embodiments support mobility internal and external to enterprise networks. Service providers provide mobility by providing Home Agent functionality corresponding to each Enterprise network. In this manner, mobility may be provided to Mobile Nodes both internal and external to their enterprise networks. Moreover, data packets may be transmitted by Mobile Nodes to Correspondent Nodes, whether they are within their enterprise network, the Service Provider network, or the Internet.