Access Router Handover Tunneling and Data Buffering
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Solution Overview
Problem
In mobile communication networks, data loss occurs during handovers due to the lack of immediate knowledge of the new access router by correspondent nodes, leading to delayed or missed data transmission when a mobile station moves between different network environments.
Innovation Solution
An access router establishes tunnels with adjacent routers based on the predicted movement of mobile stations, buffers data, and transmits it to the new access router after a handover, ensuring continuous data delivery without loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the access router waits for the mobile station to complete handover before transmitting data, then data transmission accuracy is improved, but data transmission latency increases
Solution Approach 1:
The access router performs preliminary actions by establishing tunnels with adjacent access routers and buffering data before the mobile station completes handover. This allows data to be prepared and transmitted to the target access router in advance, reducing latency while ensuring accurate delivery once handover is complete.
Solution Approach 2:
The patent introduces an intermediate buffering mechanism and tunnel establishment process between the source and target access routers. Data is temporarily stored in the source access router and forwarded through established tunnels to the target access router, acting as an intermediary to bridge the handover gap without causing data loss or excessive delay.
2Reliability
If the access router establishes tunnels with all adjacent access routers, then data delivery reliability is improved, but device complexity increases
Solution Approach 1:
Tunnels are established preliminarily with adjacent access routers before handover occurs. This preliminary tunnel establishment ensures that data delivery paths are pre-configured, improving reliability without requiring complex real-time routing decisions during handover.
Solution Approach 2:
The patent applies local quality by establishing tunnels specifically with adjacent access routers that are geographically or topologically close to the mobile station's current location. This localized approach ensures data delivery reliability for relevant handovers while avoiding the complexity of establishing tunnels with all possible access routers in the network.
Data Source
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AI summary
An access router including a module buffering first data to be transmitted to a first mobile station, and transmitting the first data to a second access router when the first mobile station moves to the second access router.