Wireless Handoff Pre-Authentication for Seamless Roaming
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Solution Overview
Problem
Conventional wireless network handoffs result in downtime due to the need for re-authentication and re-establishment of encryption keys when a mobile device roams from one access point to another, especially across different vendor equipment or service provider networks.
Innovation Solution
Implementing a system where a first wireless access point pre-authenticates neighboring access points and generates a neighbor list indicating valid handoff candidates, allowing for seamless handoffs by sharing communication settings information, thereby reducing downtime and maintaining continuous internet access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional handoff procedures are used to maintain wireless connectivity during roaming, then network security is ensured through re-authentication, but internet access downtime occurs during the handoff process
Solution Approach 1:
The patent performs pre-authentication of neighboring access points before actual handoff occurs. The source access point authenticates with target access points in advance, obtaining authentication credentials and encryption keys beforehand. This preliminary action ensures that when handoff is needed, the mobile device can immediately connect to the target access point without experiencing authentication delays, thus resolving the contradiction between maintaining security and avoiding downtime.
Solution Approach 2:
The source access point acts as an intermediary by pre-establishing authentication relationships with target access points on behalf of the mobile device. Instead of the mobile device performing authentication with each target access point during handoff (which causes downtime), the source access point mediates this process in advance, storing authentication credentials that enable seamless handoff while maintaining network security protocols.
2Reliability
If re-authentication is performed during handoff to ensure secure network access, then network security is maintained, but handoff speed and continuity are reduced
Solution Approach 1:
Authentication credentials and encryption keys are obtained in advance through pre-authentication procedures executed by the source access point before handoff is triggered. This preliminary establishment of security credentials eliminates the need for time-consuming authentication exchanges during actual handoff, thereby maintaining network security while significantly improving handoff speed.
Solution Approach 2:
The patent maintains continuous network connectivity by ensuring authentication credentials are already in place before handoff begins. The useful action of secure communication continues uninterrupted during handoff because the mobile device already possesses valid authentication credentials for the target access point, eliminating gaps in network access while preserving security.
3Reliability
If encryption keys are re-established during handoff to secure wireless communication, then communication security is ensured, but downtime and disruption occur
Solution Approach 1:
Encryption keys are pre-established between the source access point and target access points before handoff occurs. The source access point obtains the necessary encryption credentials in advance, allowing the mobile device to seamlessly switch to the target access point with immediately valid encryption keys. This preliminary key establishment reduces handoff duration while maintaining communication security.
4Adaptability or versatility
If conventional handoff procedures are implemented when roaming between different vendor equipment or service provider networks, then network compatibility is achieved, but extended downtime occurs due to re-authentication requirements
Solution Approach 1:
The source access point performs pre-authentication with target access points from different vendors or service provider networks before handoff is needed. This advance authentication establishes compatibility credentials across different network infrastructures, ensuring that when roaming occurs, the mobile device can quickly connect to heterogeneous networks without extended authentication delays, thus achieving both compatibility and minimal downtime.
Data Source
AI summary
A first wireless access point notifies a handoff management resource that a second wireless access point is a potential handoff candidate. Subsequent to authentication of the second wireless access point as being a valid handoff candidate, the handoff management resource notifies a mobile communication device that the second wireless access point is a valid handoff option to receive a communication session from the first wireless access point. To perform a handoff, the mobile communication device initiates termination of a wireless communication link with the first wireless access point and communicates with the second wireless access point to establish a new wireless communication link. In furtherance of providing uninterrupted network access, the handoff management resource conveys communication settings information associated with the handed off communication session to the second wireless access point for use over the new wireless communication link.