Synchronisation system and method
AssigneeTgoma Nz Limited
InventorJohn Robert Howe
Life of this patent
Estimating the term…
Abstract
An aspect of the invention provides a method of synchronising a first clock of a first device and a second clock of a second device comprising. The method includes transmitting 302 a dummy packet from the second device to the first device over a wireless network; determining 304 a time D2 on the second clock associated to a time that the second device initiates transmission of the dummy packet; determining 306 a time D1 on the first clock associated to the time that the first device receives transmission of the dummy packet; transmitting 308 a value of D2 from the second device to the first device; and applying 310 a correction to the first clock based at least partly on a difference between D1 and D2.
Claims24
A method of synchronising a first clock of a first sensor and a second clock of a second sensor, the first sensor and the second sensor configured to detect impact events and/or depart events on at least one of:
- a first surface, a second surface and a third surface, the method comprising:
- transmitting a dummy packet from the second sensor to the first sensor over a wireless network;
- determining a time D2 on the second clock associated to a time that the second sensor initiates transmission of the dummy packet;
- determining a time D1 on the first clock associated to the time that the first sensor receives transmission of the dummy packet;
- transmitting a value of D2 from the second sensor to the first sensor;
- and
- applying a correction to the first clock based at least partly on a difference between D1 and D2.
A clock synchronisation system comprising:
- a wireless network;
- a first sensor connected to the wireless network, the first sensor having a first clock and configured to detect impact events and/or depart events on at least one of:
- a first surface, a second surface and a third surface;
- and
- a second sensor connected to the wireless network, the second sensor having a second clock and configured to detect impact events and/or depart events on at least one of:
- the first surface, the second surface and the third surface, the second sensor further configured to:
- transmit a dummy packet from the second sensor to the first sensor over the wireless network,
- determine a time D2 on the second clock associated to a time that the second sensor initiates transmission of the dummy packet, and
- transmit a value of D2 from the second sensor to the first sensor;
- wherein the first sensor is configured to:
- determine a time D1 on the first clock associated to the time that the first sensor receives transmission of the dummy packet, and
- apply a correction to the first clock based at least partly on a difference between D1 and D2.
A computer-readable medium having stored thereon computer-executable instructions that, when executed by a processing unit of a computing device, cause the computing device to perform a method of synchronising a first clock of a first sensor and a second clock of a second sensor, the first sensor and the second sensor configured to detect impact events and/or depart events on at least one of:
- a first surface, a second surface and a third surface, the method comprising:
- transmitting a dummy packet from the second sensor to the first sensor over a wireless network;
- determining a time D2 on the second clock associated to a time that the second sensor initiates transmission of the dummy packet;
- determining a time D1 on the first clock associated to the time that the first sensor receives transmission of the dummy packet;
- transmitting a value of D2 from the second sensor to the first sensor;
- and
- applying a correction to the first clock based at least partly on a difference between D1 and D2.
Dependencies are inferred from the claim text.