Mobile Node Home Access Router Routing Table Modification
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Solution Overview
Problem
Current mobile networking protocols, such as Mobile IPv6 and Proxy Mobile IPv6, restrict traffic routing and disrupt session continuity when a mobile device switches between 3G and WLAN connections, preventing direct communication with local network devices.
Innovation Solution
A method that allows a mobile node to maintain a consistent network address by identifying the home access router's network address and modifying its routing table to enable data packet exchange with resources on the home sub-network, enabling direct communication with local devices when connected to a WLAN.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Mobile IPv6 or Proxy Mobile IPv6 protocols are used to maintain consistent network address during mobility, then session continuity is improved, but direct communication with local network devices is lost due to traffic being routed through tunnels
Solution Approach 1:
The patent segments traffic routing into two distinct paths: tunnel routing for external internet traffic to maintain session continuity, and direct local routing for home network traffic to enable direct device communication. The home access router identifies and separates these traffic types using routing table modifications, allowing simultaneous tunnel and direct connectivity without interference.
Solution Approach 2:
The home access router acts as an intermediary that receives traffic from the mobile device and intelligently routes it based on destination. For external traffic, it forwards through the tunnel to the LMA; for local home network traffic, it directs directly to the appropriate local interface, eliminating the need for traffic to traverse the tunnel unnecessarily.
2Adaptability or versatility
If tunnel routing is established between LMA and MAG to maintain home IP address, then mobile node mobility is supported, but network traffic routing becomes restrictive and complex
Solution Approach 1:
The patent performs preliminary routing table modification at the home access router before traffic needs to be routed. By pre-configuring the routing table with specific entries that identify the mobile device's home network and its associated tunnel interface, the router is prepared to handle both tunnel and direct traffic efficiently without complex real-time routing decisions.
3Speed
If the mobile device connects to WLAN access point, then faster local connection is achieved, but session continuity is interrupted due to IP address change
Solution Approach 1:
The home access router is configured with multi-functionality to simultaneously support both tunnel-based connectivity for session continuity and direct local connectivity for high-speed WLAN access. The routing table is modified to include multiple valid routes, allowing the router to handle traffic appropriately based on destination, enabling the mobile device to maintain its home IP address while utilizing the fast WLAN connection.
Data Source
AI summary
In a Proxy Mobile IPv6 (PMIP) network, a mobile node can roam between different access networks while maintaining a consistent IP address for session continuity. To provide access to a user's home LAN resources, even when the user's mobile node is not directly attached to the home LAN, a local mobility anchor and mobility access gateway are configured to authenticate the mobile node credentials and if authorized, to provide access to the user's LAN resources by via data tunnels and routing table reconfigurations.