Network Standard Switching via Data Caching to Prevent Loss
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Solution Overview
Problem
Current network standard switching methods result in data loss and service interruptions when terminal devices hand over from low-priority to high-priority networks, especially when data is being transmitted, due to the need to disconnect existing network links.
Innovation Solution
A method and apparatus that intercept and cache application-layer data before releasing the network link, allowing for seamless handover to a high-priority network, ensuring that both uplink and downlink data are not lost by re-establishing the connection with the target network after handover, and utilizing a processor to manage the data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal device forcibly disconnects the network link to switch to a high-priority network, then the network standard switching is achieved, but data loss and service interruption occur
Solution Approach 1:
The terminal device performs preliminary actions by intercepting and caching uplink application-layer data before releasing the network link, and the network device preserves downlink data in the buffer. This preliminary data preservation prevents data loss during the subsequent network standard switching process.
Solution Approach 2:
The patent introduces an intermediary mechanism where the terminal device's data cache and the network device's buffer act as mediators to temporarily hold data during the network switching transition, ensuring data continuity despite the link disconnection.
2Speed
If the terminal device releases the network link to access a high-priority network, then network priority is improved, but uplink and downlink data are lost
Solution Approach 1:
Before the terminal device releases the network link to access the high-priority network, it performs preliminary data interception and caching of uplink data. Simultaneously, the network device prepares to preserve downlink data in its buffer, ensuring no data is lost when the link is released.
Solution Approach 2:
The patent ensures continuity of useful action by maintaining data in cache and buffer states during the network switching transition, allowing data transmission to continue uninterrupted even though the network link is temporarily released.
3Adaptability or versatility
If the terminal device disconnects the network link during data transmission, then network handover is completed, but user service is interrupted
Solution Approach 1:
The terminal device and network device perform preliminary data preservation actions before the network link disconnection, caching uplink data and preserving downlink data in buffers, thereby preventing service interruption during the handover process.
Solution Approach 2:
Data caches and buffers serve as intermediaries that maintain the data flow during network handover, allowing the terminal device to switch networks without experiencing service interruption, as the intermediary structures hold the data until the new connection is established.
Data Source
AI summary
A network standard switching method includes obtaining a network standard switching instruction including a target priority. The network standard switching instruction instructs a terminal device to be handed over to a target network whose standard is a target standard, and a priority of the target network is greater than a priority of a network in which the terminal device is currently located. The method further includes releasing a network link between the terminal device and a currently accessed first base station, intercepting and caching to-be-sent application-layer data of the terminal device, discarding a paging message in a packet switched (PS) domain received from a first-priority network to the terminal device, and handing over to the target network.