US 12,756,646 B1Granted

Precision time protocol clock synchronization in a high availability network

AssigneeCalix, Inc.

InventorsYoubin Xiang, Xi Kang, Weining Zhou

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Abstract

The disclosure provides an approach for precision time protocol (PTP) clock synchronization. Embodiments include transmitting, by a time transmitter node to a time receiver node, a synchronization message via one or more intermediate nodes. The one or more intermediate nodes may record path information associated with routing the synchronization message. Embodiments include receiving, by the time transmitter node, a delay request message from the time receiver node via the one or more intermediate nodes. The delay request message may be routed to the time transmitter node based on the path information. Embodiments include transmitting, by the time transmitter node to the time receiver node, a delay response message via the one or more intermediate nodes.

Claims20

Dependent claims

A system for precision time protocol (PTP) clock synchronization, comprising:

a time transmitter node configured to:
transmit, to a time receiver node, a synchronization message via one or more intermediate nodes, wherein the one or more intermediate nodes record path information associated with routing the synchronization message;
receive a delay request message from the time receiver node via the one or more intermediate nodes, wherein the delay request message is routed to the time transmitter node based on the path information;
and
transmit, to the time receiver node, a delay response message via the one or more intermediate nodes;
and
the time receiver node configured to:
receive the synchronization message from the time transmitter node via the one or more intermediate nodes;
transmit, to the time transmitter node, the delay request message via the one or more intermediate nodes;
receive the delay response message from the time transmitter node via the one or more intermediate nodes;
and
compute a delay between the time transmitter node and the time receiver node based on timestamps associated with the delay request message and the delay response message.

9 more elements

A method for precision time protocol (PTP) clock synchronization, comprising:

transmitting, by a time transmitter node to a time receiver node, a synchronization message via one or more intermediate nodes, wherein the one or more intermediate nodes record path information associated with routing the synchronization message;
receiving, by the time transmitter node, a delay request message from the time receiver node via the one or more intermediate nodes, wherein the delay request message is routed to the time transmitter node based on the path information;
and
transmitting, by the time transmitter node to the time receiver node, a delay response message via the one or more intermediate nodes.

1 more element

Dependencies are inferred from the claim text.