Method and apparatus for sending and receiving clock synchronization packet
US-2020244383-A1 · Jul 30, 2020 · US
Time transfer systems and methods over a stream of Ethernet blocks
US11316802B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11316802-B2 |
| Application number | US-202016855188-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 22, 2020 |
| Priority date | Sep 29, 2015 |
| Publication date | Apr 26, 2022 |
| Grant date | Apr 26, 2022 |
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- Title
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Abstract
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Time transfer systems and methods implemented in a first node steps of communicating a stream of encoded blocks with a second node; and communicating synchronization messages with the second node via a synchronization message channel in overhead associated with the stream of encoded blocks, wherein the synchronization messages are utilized for synchronization of a clock at the second node. Each block in the stream of encoded blocks can be one of a data block and an overhead block.
First claim
Opening claim text (preview).
What is claimed is: 1. A time transfer method implemented in a first node, the time transfer method comprising: communicating a sequence of encoded blocks with a second node; and communicating synchronization messages that include Precision Time Protocol (PTP) messages with the second node via a synchronization message channel in flexible ethernet overhead associated with the sequence of encoded blocks, wherein the synchronization messages are utilized for synchronization of a clock at the second node. 2. The time transfer method of claim 1 , wherein each block in the sequence of encoded blocks is one of a data block and an overhead block. 3. The time transfer method of claim 2 , wherein each block in the sequence of encoded blocks is distributed based on a calendar. 4. The time transfer method of claim 2 , wherein the synchronization message channel is via reserved fields in the overhead. 5. The time transfer method of claim 2 , wherein the synchronization message channel is via a management channel in the overhead. 6. The time transfer method of claim 1 , wherein a timestamp point of reference for use in the synchronization messages includes a designated boundary between a pair of adjacent blocks, and wherein the designated boundary is based on a frame structure for blocks in the sequence of encoded blocks. 7. The time transfer method of claim 1 , wherein the sequence of encoded blocks are encoded based on 64b/66b encoding. 8. A node comprising: one or more ports including a port configured to communicate with a second node; and circuitry configured to communicate a sequence of encoded blocks with a second node, and communicate synchronization messages that include Precision Time Protocol (PTP) messages with the second node via a synchronization message channel in flexible ethernet overhead associated with the sequence of encoded blocks, wherein the synchronization messages are utilized for synchronization of a clock at the second node. 9. The node of claim 8 , wherein each block in the sequence of encoded blocks is one of a data block and an overhead block. 10. The node of claim 9 , wherein each block in the sequence of encoded blocks is distributed based on a calendar. 11. The node of claim 9 , wherein the synchronization message channel is via reserved fields in the overhead. 12. The node of claim 9 , wherein the synchronization message channel is via a management channel in the overhead. 13. The node of claim 8 , wherein a timestamp point of reference for use in the synchronization messages includes a designated boundary between a pair of adjacent blocks, and wherein the designated boundary is based on a frame structure for blocks in the sequence of encoded blocks. 14. The node of claim 8 , wherein the sequence of encoded blocks are encoded based on 64b/66b encoding. 15. A non-transitory computer-readable storage medium having computer readable code stored thereon for programming a first node to perform steps of: communicating a sequence of encoded blocks with a second node; and communicating synchronization messages that include Precision Time Protocol (PTP) messages with the second node via a synchronization message channel in flexible ethernet overhead associated with the sequence of encoded blocks, wherein the synchronization messages are utilized for synchronization of a clock at the second node. 16. The non-transitory computer-readable storage medium of claim 15 , wherein each block in the sequence of encoded blocks is one of a data block and an overhead block. 17. The non-transitory computer-readable storage medium of claim 15 , wherein a timestamp point of reference for use in the synchronization messages includes a designated boundary between a pair of adjacent blocks, and wherein the designated boundary is based on a frame structure for blocks in the sequence of encoded blocks. 18. The non-transitory computer-readable storage medium of claim 15 , wherein the sequence of encoded blocks are encoded based on 64b/66b encoding.
Assignees
Inventors
Classifications
using time related information in packets, e.g. by adding timestamps · CPC title
Optical Transport Network [OTN] · CPC title
- H04J3/065Primary
using timestamps · CPC title
Round trip delays · CPC title
One way delays · CPC title
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Frequently asked questions
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- What does patent US11316802B2 cover?
- Time transfer systems and methods implemented in a first node steps of communicating a stream of encoded blocks with a second node; and communicating synchronization messages with the second node via a synchronization message channel in overhead associated with the stream of encoded blocks, wherein the synchronization messages are utilized for synchronization of a clock at the second node. Each…
- Who is the assignee on this patent?
- Ciena Corp
- What technology area does this patent fall under?
- Primary CPC classification H04J3/065. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Apr 26 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).