Wi-Fi Service Type Broadcast for Pre-Association Network Selection
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Solution Overview
Problem
Existing wireless network technologies do not efficiently provide information about available third-party services to mobile devices before association, leading to unnecessary disconnections and delays in network selection.
Innovation Solution
A simplified service discovery mechanism that conveys service type announcements using low-level layer 2 frames, allowing mobile devices in a pre-associated state to determine available services and optimize network selection without full association.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If ANQP protocol is used to provide network information, then mobile devices can request network information prior to association, but third-party service availability information is not provided and devices must disconnect to find suitable networks
Solution Approach 1:
The patent applies preliminary action by enabling mobile devices to discover third-party service availability information before associating with the wireless network. The access point broadcasts service type announcement elements in beacon frames, allowing devices to pre-determine service compatibility and avoid unnecessary associations and disconnections, thus reducing network selection time.
2Loss of information
If full association is performed before service discovery, then complete network information can be obtained, but unnecessary disconnections and delays occur
Solution Approach 1:
The patent extracts the essential service discovery function from the full association process. By broadcasting service type announcement elements in beacon frames before association, the system separates service information availability from the association procedure, allowing devices to make informed network selection decisions without completing full association, thereby improving efficiency.
Solution Approach 2:
The patent enables preliminary service discovery through beacon frame broadcasts before association occurs. Devices can determine third-party service availability in advance, performing the critical information-gathering action beforehand rather than requiring full association, thus eliminating unnecessary disconnections and improving network selection productivity.
3Reliability
If service discovery is performed after association, then all network services are accessible, but devices experience unnecessary disconnections
Solution Approach 1:
The patent applies preliminary action by providing service type announcement elements in beacon frames before association. Mobile devices can determine third-party service availability in advance, ensuring reliable service access planning without requiring post-association discovery, thereby preventing unnecessary disconnections and reconnections.
Data Source
AI summary
A service type announcement element indicates one or more service types offered by an access point (AP) that supports station a wireless network. The service type announcement element is generated by the AP and included in a beacon frame or in a probe response frame. The beacon frame or the probe response frame is transmitted by the AP and received by a mobile device prior to the mobile device being associated with the AP. The mobile device makes a determination whether any of the one or more service types can assist with an operation of an application on the mobile device and implements a network selection algorithm based on the determination.