Access Point Pre-Authentication for Wi-Fi Roaming Delay Reduction
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Solution Overview
Problem
Current Wi-Fi roaming methods experience significant delays due to the time-consuming key exchange process when a mobile station switches from one access point to another, affecting network accessibility and user experience.
Innovation Solution
A wireless roaming method that determines if a key for the target access point is stored, and if not, performs key exchange on behalf of the mobile station before switching, reducing the need for subsequent key exchange upon connection, thereby minimizing roaming delays and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If key exchange is performed after switching to target access point, then security is maintained, but roaming delay increases
Solution Approach 1:
The patent performs key exchange between access points before the mobile station actually roams. The source access point and target access point complete the security key establishment in advance, so when roaming occurs, the mobile station can immediately connect without waiting for key exchange, thus resolving the contradiction between maintaining security and reducing roaming delay
Solution Approach 2:
The source access point acts as an intermediary that facilitates pre-key exchange with the target access point. Instead of the mobile station directly exchanging keys with the target AP after roaming, the source AP mediates the key establishment process beforehand, enabling faster roaming while maintaining security
2Reliability
If mobile station performs key exchange with target access point, then authentication is ensured, but roaming efficiency decreases
Solution Approach 1:
Authentication through key exchange is performed in advance between access points before the mobile station needs to roam. This preliminary authentication ensures security requirements are met while eliminating the time-consuming key exchange process during actual roaming, thus improving roaming efficiency without compromising authentication
Solution Approach 2:
The authentication process is copied from the traditional mobile station-to-target-AP model to a source-AP-to-target-AP model. By replicating the key exchange function at the access point level rather than at the mobile station level, the system maintains authentication integrity while significantly reducing roaming time
Data Source
AI summary
A wireless roaming method, an access point apparatus and a mobile station are disclosed. The wireless roaming method comprises: determining whether or not a key for a target access point corresponding to a mobile station is stored; if the key is not stored, performing key exchange on behalf of the mobile station with the target access point so as to obtain a key corresponding to the mobile station; and sending the key to the mobile station. In the technical solution of the present disclosure, before the mobile station connects to a target access point, a current access point, on behalf of the mobile station, obtains a key corresponding to the mobile from the target access point. Therefore, the mobile station does not need to perform key exchange with the target access point after accessing to the target access point, which may reduce roaming delays caused by key exchange and improve the efficiency of wireless roaming, and thereby improve user experience.