Adapter that converts precision time protocol (PTP) to global positioning system (GPS)

摘要

A method and apparatus are provided for converting a precision time protocol (PTP) to a GPS signal. Enterprise versions of Femtocells are located within buildings and do not have access to a GPS signal directly from a GPS satellite. An adapter is provided that takes an available PTP and power over Ethernet (PoE) flow and converts the signal into a pseudo-GPS signal that acts as a timing input into the Femtocell. The pseudo-GPS signal is a GPS signal modulated at the L1 band frequency or 1575.42 megahertz, but does not have location data nor subframes 1, 2, or 3, as found in an ordinary GPS signal.

主权项

1. A method for relaying a global positioning system (GPS) signal using an Ethernet cable, comprising:
receiving a power over Ethernet (PoE) flow and a precision time protocol (PTP) at an adapter; converting at least one of the PoE flow or the PTP to the GPS signal in the adapter; and sending the GPS signal to a type of base station, wherein the GPS signal includes a L1 band frequency but does not include location data and subframes 1, 2, or 3.