Patent ID: 9664795
Date: 2017-05-30
CPC Classifications: G01S,G16H,H04B,H04L,H04N,H04W,Y02D

Claim:
1. A method of determining a global position of a worn biometric monitoring device with a memory configured to store ephemeris data, the method comprising: (a) determining that the worn biometric monitoring device does not have stored updated ephemeris data in the memory; (b) determining that an ephemeris update condition has been met, wherein the update condition is selected from the group consisting of the worn biometric monitoring device having a battery charge level exceeding a battery charge threshold, Wi-Fi or cell tower multilateration data indicating that the worn biometric monitoring device is outdoors, and any combination thereof; and (c) responsive to (a) and (b), obtaining updated ephemeris data via a wireless short-range, low-power communication protocol from a secondary device associated with the worn biometric monitoring device and storing the updated ephemeris data in the memory, wherein the updated ephemeris data originated from a server configured to serve ephemeris data.