Distributing timing over metro transport networking
AssigneeCiena Corporation
InventorsSebastien Gareau, Andrew McCarthy
Life of this patent
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Abstract
Systems and methods for timing over a Metro Transport Networking (MTN) path include detecting a specific block in a stream of blocks, wherein each block is encoded based on a line code, and sampling an output of a clock to determine a timestamp reference based on detection of the specific block, and transmitting timing information based on the timestamp reference. The specific block can be a control block. The timing information can be transmitted via a Precision Time Protocol (PTP) message. The timing information can be transmitted via a plurality of subsequent specific blocks.
Claims19
An apparatus comprising:
- circuitry configured to detect a specific block in transmitted blocks, wherein each block of the transmitted blocks is encoded based on a line code, and to sample an output of a clock to determine a timestamp reference based on detection of the specific block that has an operational code (O code) denoting timing transfer;
- and
- circuitry configured to transmit timing information based on the timestamp reference.
A node comprising:
- a clock;
- and
- a circuit configured to
- detect a specific block in transmitted blocks, wherein each block in the transmitted blocks is encoded based on a line code, and sample an output of the clock to determine a timestamp reference based on detection of the specific block that has an operational code (O code) denoting timing transfer, and
- cause transmission of timing information based on the timestamp reference.
A method comprising:
- detecting a specific block in transmitted blocks, wherein each block in the transmitted blocks is encoded based on a line code, and sampling an output of a clock to determine a timestamp reference based on detection of the specific block that has an operational code (O code) denoting timing transfer;
- and
- transmitting timing information based on the timestamp reference.
Dependencies are inferred from the claim text.