Hybrid Route Optimization for Mobile Endpoints
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Solution Overview
Problem
Current hybrid route optimization methods in wireless telecommunications do not effectively address the scenario of two mobile nodes communicating with each other, which is expected to grow due to the increasing popularity of smartphones and high-speed wireless channels, necessitating improved bandwidth management and power optimization for HD multimedia sessions.
Innovation Solution
A method and network architecture that enables hybrid route optimization between two mobile endpoints by using a 'presence' service to redirect data traffic to an optimal path without exchanging mobility signaling messages, involving a mobile node, home agent, destination home agent, and access routers that subscribe for presence notifications to update care-of addresses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional route optimization methods are used where mobile nodes exchange mobility signaling messages, then route optimization can be achieved, but signaling overhead and latency increase
Solution Approach 1:
The patent extracts the mobility signaling exchange from the mobile nodes and relocates it to the network infrastructure (home agents and access routers). The home agents subscribe to presence services and receive mobility updates directly from the network, eliminating the need for mobile nodes to exchange signaling messages with each other, thus reducing latency and signaling overhead.
Solution Approach 2:
The patent introduces home agents as intermediary entities that mediate between mobile nodes and the network infrastructure. Instead of mobile nodes directly exchanging mobility information, the home agents subscribe to presence services and receive updates from access routers, then use this information to optimize routes, acting as intermediaries that reduce direct signaling between mobile nodes.
2Productivity
If hybrid route optimization is implemented with network infrastructure involvement, then bandwidth management and power optimization improve, but system complexity increases
Solution Approach 1:
The patent makes home agents multi-functional entities that perform both traditional mobility management functions and new route optimization functions. By subscribing to presence services and receiving mobility updates, home agents simultaneously manage mobile node registration and optimize data routes, eliminating the need for separate route optimization infrastructure and reducing overall system complexity.
Solution Approach 2:
The patent implements preliminary subscription to presence services by home agents before mobile node communication occurs. By pre-subscribing to presence notifications for potential correspondent nodes, the network infrastructure is prepared to immediately optimize routes when communication begins, eliminating the need for complex real-time route calculation mechanisms during active communication.
3Measurement precision
If presence service subscription is implemented for route optimization, then real-time location updates are achieved, but signaling overhead between network elements increases
Solution Approach 1:
The patent implements partial presence service subscription where home agents only subscribe to presence notifications for specific correspondent nodes that are relevant to their mobile nodes. Instead of subscribing to all presence notifications in the network, home agents selectively subscribe based on communication patterns, reducing the number of presence notification messages while maintaining accurate location tracking for relevant nodes.
Data Source
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AI summary
A network, a method and devices (i.e., mobile node, access router, home agent, destination home agent) are described herein for enabling an efficient hybrid route optimization between two mobile endpoints so they can re-direct their data traffic to an optimal path without exchanging any mobility signaling messages.