US 2024/0210899 A1 · SYNCHRONIZATION WITH MULTIPLE TIME SOURCES

Abstract

A satellite-synchronized network clock may include an oscillator, a global navigation satellite system (GNSS) time receiver module, and a control subsystem. The GNSS time receiver module may include a time receiver, a multiplexer, and a plurality of source inputs. The control subsystem may configure the multiplexer and time receiver of the GNSS time receiver module to sequentially receive time signals from a plurality of GNSS satellite constellations. Methods of synchronizing multiple time sources may include sequentially receiving a first time signal from a first GNSS constellation, a second time signal from a second GNSS constellation, and a third time signal from a third GNSS constellation with a GNSS receiver. The methods may further include measuring a phase and frequency offset of each respective received time signal relative to an oscillator and comparing the measured offsets to determine the accuracy of each of the received time signals.

Claims21

Dependent claims

A time synchronization system, comprising:

a global navigation satellite system (GNSS) subsystem comprising:
a source input to connect to a plurality of GNSS constellations and receive GNSS time signals from each of the plurality of GNSS constellations;
and
a time receiver subsystem to receive the GNSS time signals using the source input,
a local oscillator to generate a local time signal;
and
a control subsystem to:
sequentially connect to each of the plurality of GNSS constellations and receive GNSS time signals from each of the plurality of GNSS constellations;
track at least one of a drift rate and an offset between the GNSS time signals from each of the plurality of GNSS constellations and the local time signal;
evaluate the GNSS time signals from each of the plurality of GNSS constellations against the local oscillator and local time signal based on at least one of the drift rate and the offset;
and
generate an output based on at least one GNSS time signal from at least one of the plurality of GNSS constellations.

9 more elements

Dependencies are inferred from the claim text.

Synchronization with multiple time sources

Life of this patent

Synchronization with multiple time sources

Life of this patent

Abstract

Claims21