Automated location determination to support VoIP E911 using self-surveying techniques for ad hoc wireless networks
US9596582B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 2015 |
| Grant date | Mar 14, 2017 |
| Priority date | — |
| Expiry date | Aug 31, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/18
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Network devices in an Ad-Hoc wireless network self-survey themselves as necessary for approximate location or precise position information, based on methods employed, particularly useful for a non-open-sky environment. A WiFi Access Point (AP) with or without an internal GPS receiver and location conveyance support may utilize the mesh technique. If an Ad-Hoc network device is unable to contact a suitable location server, or a position request has otherwise failed to deliver a precise position, a WiFi AP is manually configured with appropriate location information, and then offers itself as if it were a location server (thereby becoming an ‘internal’ server’, containing either the determined or provisioned location of itself, for use by other APs or devices). A location server (either internal to the AP needing location, or external), performs a ‘mesh’ location determination by selecting position information from 3 or more location determined APs for subsequent processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.