Network Switching Preparation via Intermediary Gateway
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Solution Overview
Problem
Existing network switching methods between WLAN and cellular networks, such as LTE, cause wireless interference due to the need to maintain simultaneous connections during the switching process.
Innovation Solution
A method for network switching that completes the necessary preparation processes in the current network before switching, allowing the terminal to disconnect from the first network and reconnect to the second network without interference, by obtaining and transmitting required messages and IP addresses through established connection channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the 'make before break' method is used for network switching, then connection continuity is maintained, but wireless interference occurs due to simultaneous wireless interfaces being opened
Solution Approach 1:
The patent applies preliminary action by completing all switching preparation processes (authentication, IP address allocation, tunnel establishment) through the first network before the terminal actually switches to the second network. This allows the terminal to disconnect from the first network without interruption, as the second network is already ready to accept the connection immediately.
Solution Approach 2:
The patent uses a gateway network element as an intermediary that coordinates the switching process. The gateway establishes tunnels and prepares the second network on behalf of the terminal, acting as a mediator that enables seamless switching without the terminal needing to maintain simultaneous connections to both networks.
2Adaptability or versatility
If wireless interfaces of WLAN and cellular networks are opened simultaneously during switching, then connection handover is enabled, but wireless interference problems arise
Solution Approach 1:
All necessary preparations for joining the second network (authentication, IP address assignment, tunnel setup) are completed in advance through the first network connection. This eliminates the need to open both wireless interfaces simultaneously, as the terminal can directly join the prepared second network after disconnecting from the first.
Solution Approach 2:
The switching process is segmented into distinct phases: preparation phase (completed through first network using protocols like GTP), and execution phase (terminal disconnects and joins second network). This segmentation allows the terminal to use only one wireless interface at a time, avoiding interference while maintaining switching capability.
Data Source
AI summary
The present invention provides a method, a device, a network element and a system for-switching a network. The method may include: obtaining, through a first network that a terminal accesses, a message required by a preparation process before the terminal switches to a second network; alternating with the second network according to the message, after the preparation process before the switching is completed, releasing a first connection so as to make the terminal directly establish a connection to the second network after releasing the first connection channel. According to the solution of the present invention, the problem of interference generated when two networks switch is avoided.