US 2023/0418325 A1 · CLOCK SYNCHRONISATION

Abstract

A method of performing clock synchronisation across multiple devices, the method including: in a first device: emitting timing pulses based on a first clock signal; and, outputting event data including events associated with first event times based on the first clock signal; in a second device: receiving the timing pulses; and, generating reference data including an indication of each timing pulse associated with a reference time based on a second clock signal; and, in one or more processing devices: receiving the event data; recording an approximate local event time for each event based on a time of local receipt determined using a local clock signal; using the local event times and first event times to derive a first function that relates the first clock signal and the local clock signal; using the first function and the reference data to derive a synchronisation function relating the first and second clock signals; and, using the synchronisation function to perform clock synchronisation of the first and second clock signals.

Claims21

Dependent claims

A method of performing clock synchronisation across multiple devices, the method including:

a) in a first device:
i) emitting timing pulses based on a first clock signal;
and,
ii) outputting event data including events associated with first event times based on the first clock signal;
b) in a second device:
i) receiving the timing pulses;
and,
ii) generating reference data including an indication of each timing pulse associated with a reference time indicative of the time receipt by the second device based on a second clock signal;
and,
c) in one or more processing devices:
i) receiving the event data from the first device;
ii) recording an estimated local event time for each event based on a time of local receipt determined using a local clock signal;
iii) using the local event times and first event times to derive a first function that relates the first clock signal and the local clock signal;
iv) using the first function and the reference data received from the second device to derive a synchronisation function relating the first and second clock signals;
and,
v) using the synchronisation function to perform time synchronisation of the first and second clock signals.

13 more elements

Apparatus for performing clock synchronisation across multiple devices including:

a) a first device configured to:
i) emit timing pulses based on a first clock signal;
and,
ii) output event data including events associated with first event times based on the first clock signal;
and,
b) a second device configured to:
i) receive the timing pulses;
and,
ii) generate reference data including an indication of each timing pulse associated with a reference time indicative of the time receipt by the second device based on a second clock signal, the apparatus including in one or more processing devices configured to:
(1) receive the event data from the first device;
(2) record an estimated local event time for each event based on a time of local receipt determined using a local clock signal;
(3) use the local event times and first event times to derive a first function that relates the first clock signal and the local clock signal;
(4) use the first function and the reference data received from the second device to derive a synchronisation function relating the first and second clock signals;
and,
(5) use the synchronisation function to perform time synchronisation of the first and second clock signals.

12 more elements

Dependencies are inferred from the claim text.

Clock synchronisation

Life of this patent

Clock synchronisation

Life of this patent

Abstract

Claims21