US 12,261,641 B2
Delay measurement for hybrid packet and optical transport networks
Christian Schmutzer, Koenigsbrunn im Weinviertel (AT); and Luca Della Chiesa, Cesenatico (IT)
Assigned to CISCO TECHNOLOGY, INC., San Jose, CA (US)
Filed by Cisco Technology, Inc., San Jose, CA (US)
Filed on Nov. 18, 2022, as Appl. No. 17/989,788.
Prior Publication US 2024/0171271 A1, May 23, 2024
Int. Cl. H04B 10/07 (2013.01); H04B 10/077 (2013.01); H04J 3/16 (2006.01); H04L 43/0852 (2022.01)
CPC H04B 10/0775 (2013.01) [H04J 3/1664 (2013.01); H04L 43/0852 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for measuring end-to-end delay between a first node and a second node in a hybrid network environment that includes a first network domain of a first network type and a second network domain of a second network type, the first node being a part of the first network domain and the second node being a part of the second network domain, the method performed by a gateway node that is at a boundary of the first network domain and the second network domain, the method comprising:
receiving an end-to-end delay measurement request sent by the first node to measure end-to-end delay between the first node and the second node, the end-to-end delay measurement request configured to initiate a first delay measurement process configured for use in the first network domain;
sending to the second node a delay measurement request configured to initiate a second delay measurement process configured for use in the second network domain;
determining a delay measurement in the second network domain between the gateway node and the second node using the second delay measurement process; and
using the delay measurement in the second network domain, sending to the first node an end-to-end delay measurement response that enables the first node to compute the end-to-end delay.