System and method to achieve datapath latency symmetry through an OTN wrapper

A method of enabling transport of symmetric latency-sensitive constant bit rate (CBR) client data streams over an Optical Transport Network (OTN), the method comprising:

• performing, utilizing an OTN wrapping device, an OTN wrapping operation on a received first CBR client data stream to form a first framed OTN data stream, the first framed OTN data stream including the first CBR client data stream;
• determining a static wrapping delay induced on the first CBR client data stream by the OTN wrapping operation;
• performing, utilizing the OTN wrapping device, an OTN unwrapping operation on a received second framed OTN data stream to extract a second CBR client data stream from the second framed OTN data stream, the second framed OTN data stream including the second CBR client data stream;
• determining a static unwrapping delay induced on the second CBR client data stream by the OTN unwrapping operation, the determining a static unwrapping delay comprising:
• (a) measuring a total unwrapping delay induced on the second CBR client data stream by the OTN unwrapping operation;
• (b) determining an intrinsic dynamic unwrapping delay induced on the second CBR client data stream by the OTN unwrapping operation;
• and
• (c) obtaining the static unwrapping delay by subtracting the determined intrinsic dynamic unwrapping delay from the measured total unwrapping delay;
• and
• equalizing the determined static wrapping and unwrapping delays by adiusting, at the OTN wrapping device, at least one of the static wrapping delay and the static unwrapping delay.

A system for enabling transport of symmetric latency-sensitive constant bit rate (CBR) client data streams over an Optical Transport Network (OTN), the system comprising:

• an OTN wrapping device configured to:
• perform an OTN wrapping operation on a first CBR client data stream received from a network to form a first framed OTN data stream, the first framed OTN data stream including the first CBR client data stream;
• and
• perform an OTN unwrapping operation on a second framed OTN data stream received from the network to extract a second CBR client data stream from the second framed OTN data stream, the second framed OTN data stream including the second CBR client data stream;
• a processor operably coupled to the OTN wrapping device and configured to:
• determine a static wrapping delay induced on the first CBR client data stream by the OTN wrapping operation, the determining a static wrapping delay comprising:
• (a) measuring a total wrapping delay induced on the first CBR client data stream by the OTN wrapping operation;
• (b) determining an intrinsic dynamic wrapping delay associated with the OTN wrapping operation;
• and
• (c) obtaining the static wrapping delay by subtracting the determined intrinsic dynamic wrapping delay from the measured total wrapping delay;
• determine a static unwrapping delay induced on the second CBR client data stream by the OTN unwrapping operation;
• and
• equalize the determined static wrapping and unwrapping delays by adjusting at least one of the determined static wrapping delay and the static unwrapping delay.

A system for enabling transport of symmetric latency-sensitive constant bit rate (CBR) client data streams over an Optical Transport Network (OTN), the system comprising:

• an OTN wrapping device configured to:
• perform an OTN wrapping operation on a first CBR client data stream received from a network to form a first framed OTN data stream, the first framed OTN data stream including the first CBR client data stream;
• and
• perform an OTN unwrapping operation on a second framed OTN data stream received from the network to extract a second CBR client data stream from the second framed OTN data stream, the second framed OTN data stream including the second CBR client data stream;
• a processor operably coupled to the OTN wrapping device and configured to:
• determine a static wrapping delay induced on the first CBR client data stream by the OTN wrapping operation;
• determine a static unwrapping delay induced on the second CBR client data stream by the OTN unwrapping operation, the determining a static unwrapping delay comprising:
• (a) measuring a total unwrapping delay induced on the second CBR client data stream by the OTN unwrapping operation;
• (b) determining an intrinsic dynamic unwrapping delay induced on the second CBR client data stream by the OTN unwrapping operation;
• and
• (c) obtaining the static unwrapping delay by subtracting the determined intrinsic dynamic unwrapping delay from the measured total unwrapping delay;
• and
• equalize the determined static wrapping and unwrapping delays by adiustinq at least one of the determined static wrapping delay and the static unwrapping delay.