SYSTEM AND/OR METHOD OF LOCATING A PORTABLE SERVICE ACCESS TRANSCEIVER

摘要

Described are devices, methods, techniques and systems for locating a portable services access transceiver (PSAT) for use in aiding emergency “911” services. In one implementation, one or more conditions indicative of movement of a PSAT may initiate a process for obtaining a new estimated location of the PSAT. In another implementation, a location of a PSAT may be determined or updated using indoor navigation techniques.

主权项

1. A method comprising, at a portable service access transceiver:
determining an estimated location of the portable service access transceiver; transmitting one or more first messages including said estimated location to a server for use in a positioning service; detecting one or more conditions indicative of movement of the portable service access transceiver relative to a point of reference; and transmitting one or more second messages to said server indicating a reliability of or uncertainty in said estimated location in response to said detection of said one or more conditions.