Captive portal state detection and avoidance for multiple-interface traffic offloading
US9820200B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2011 |
| Grant date | Nov 14, 2017 |
| Priority date | — |
| Expiry date | Mar 2, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a mobile device connecting to a Wi-Fi hotspot first performs a connectivity check to determine whether the wireless connection is trapped in the walled garden of a captive portal by transmitting a connectivity check message to one or more external endpoints in the public IP network. If no response is received, the mobile device determines that it is in the captive portal state, and generates a browser window bound to the Wi-Fi state tracker of the mobile device displaying the portal page for the captive portal. In such a manner, the mobile device does not offload any traffic from its wireless cellular interface to its Wi-Fi interface until it is certain the Wi-Fi interface may access the public IP network, thereby preventing data interruption for mobile applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.