Mobile Node Bypassing Home Agent for Direct Data Path
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Solution Overview
Problem
In wireless communication systems, mobile nodes experience significant latency and transmission errors due to data packet detours when roaming, which negatively impact the quality of service, especially for real-time data such as audio or video calls, as packets may be delayed or lost during transmission through intermediate networks.
Innovation Solution
A communication system where a mobile node initiates a communication session using a first address for signaling through a home agent, and then uses a second address for direct data path communication with the correspondent node, bypassing the home agent, thereby reducing latency and errors by establishing a shorter data path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mobile nodes use home agent routing for data transmission, then signaling and session management are simplified, but transmission latency increases and packet delivery reliability deteriorates
Solution Approach 1:
The patent segments the communication path into two distinct phases: a signaling phase where the mobile node uses its home agent address for session initiation and management, and a data transmission phase where the mobile node uses its care-of address to establish direct routing. This segmentation allows each phase to optimize for its specific requirements, resolving the contradiction between operational simplicity and transmission efficiency.
Solution Approach 2:
The patent implements dynamic address selection based on the type of traffic. For signaling traffic, the home agent address is used to maintain centralized control. For data traffic, the care-of address is used to enable direct routing. This dynamic adaptation allows the system to optimize performance for each traffic type independently, reducing overall latency without sacrificing management simplicity.
2Extent of automation
If data packets route through intermediate networks via home agent, then centralized control is maintained, but packet loss increases and quality of service deteriorates
Solution Approach 1:
The patent separates control functions from data transmission functions. The home agent maintains centralized control for session management and mobility anchoring, while the mobile node establishes direct data paths through care-of addresses. This segmentation allows centralized control to be maintained for management purposes while eliminating the routing detour that causes packet loss, thereby improving reliability.
Solution Approach 2:
The patent uses the care-of address as an intermediary mechanism that enables direct routing. Instead of all packets going through the home agent, the care-of address acts as an intermediary point that allows data packets to be routed directly to the mobile node's current location, reducing packet loss while the home agent continues to provide centralized control for session management.
3Adaptability or versatility
If mobile nodes roam to foreign networks, then network coverage is extended, but data path length increases causing latency
Solution Approach 1:
The patent dynamically updates the mobile node's address configuration when it roams to a foreign network. The node obtains a care-of address from the foreign network and configures it for direct data routing. This dynamic reconfiguration allows the data path to be shortened to reflect the node's current location, reducing latency while maintaining network coverage through seamless roaming.
Solution Approach 2:
The patent performs preliminary actions during the roaming process by pre-establishing the care-of address and configuring direct routing parameters before data transmission begins. This preliminary setup ensures that when data traffic starts, the optimal direct path is already in place, minimizing latency while the node continues to benefit from extended network coverage.
Data Source
AI summary
In a wireless communications system in which a mobile node seeks a communication session with a correspondent node by first signaling for initialization of the communication session through a first data path via an intermediate node. Thereafter, contents of the communication is established through a second data path in which the mobile node and the correspondent node communicate straightforwardly without going through the intermediate node.