Automated location determination to support VoIP E911 using self-surveying techniques for ad hoc wireless networks

摘要

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.

主权项

1. A method of obtaining iterative location information in an Internet Protocol (IP) network, comprising:
receiving, at a wireless network device, an emergency 9-1-1 call from a cellular device; receiving, by said wireless network device, a first meshed location from a first member wireless device, a second meshed location from a second member wireless device and at least one additional location that is a meshed or measured location from one or more additional wireless devices in response to receiving said emergency 9-1-1 call from said cellular device; and meshing said first meshed location, said second meshed location and said at least one additional location into a single meshed location associated with said wireless network device to provide a coarse location for said cellular device, said single mesh location comprising a meshed latitude from a meshing of a latitude of said first meshed location and a latitude of said second meshed location.