Wireless Fast Roaming with Backup Links for Packet-Loss-Free Handover
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Solution Overview
Problem
Current wireless network technologies experience packet loss during fast roaming due to the time required for standard fast roaming protocols like 802.11r, which is not suitable for scenarios where communication interruptions are not allowed.
Innovation Solution
A wireless fast roaming system with multiple trackside wireless access points and virtual base stations in mobile devices, utilizing signal scanning, screening, and link establishment modules to establish a backup link, enabling seamless switching between data and backup links based on signal-to-noise ratio and unique identity checks, ensuring uninterrupted data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If standard fast roaming protocol 802.11r is used, then roaming speed is improved, but packet loss occurs during the roaming process
Solution Approach 1:
The patent pre-establishes a backup link before the data link becomes abnormal. The fast roaming module proactively creates a backup data link between the wireless mobile device and an alternative trackside wireless access point, so that when the current data link fails, the backup link is already ready for immediate switching without causing packet loss.
Solution Approach 2:
The patent sets up a backup link in advance as a cushion against potential data link failures. This backup link acts as a safety buffer that can be activated immediately when the primary data link becomes abnormal, preventing communication interruptions and packet loss during transitions.
2Reliability
If a backup link is established and maintained, then network reliability is improved, but device complexity increases
Solution Approach 1:
The fast roaming module automatically monitors the data link status and manages the backup link without requiring manual intervention. The system self-services by detecting link abnormalities and performing seamless switching between data links, reducing the need for complex manual configuration and management while maintaining high reliability.
Solution Approach 2:
The fast roaming module continuously monitors the status of the data link and uses this feedback to determine when to switch to the backup link. This feedback mechanism enables automatic, intelligent decision-making for link switching, simplifying the overall system control while ensuring reliable operation.
Data Source
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AI summary
The invention provides a wireless fast roaming system and method, and relates to the technical field of communication, and the system comprises a plurality of trackside wireless access points; at least one wireless mobile device, at least two virtual base stations are configured in each wireless mobile device in advance, and each trackside wireless access point found by scanning is added into the associable basic service set after the wireless mobile device is started; screening the associable basic service set to obtain an optimal trackside wireless access point and a suboptimal trackside wireless access point; respectively establishing a data link between one virtual base station and the optimal trackside wireless access point and a backup link between the other virtual base station and the suboptimal trackside wireless access point; and controlling the virtual base station corresponding to the backup link to roam and switching the current backup link to the data link and switching the original data link to the backup link when the data link is abnormal. The method has the beneficial effects that wireless data transmission is not interrupted, packets are not lost in a roaming process, and the network transmission reliability is improved.