Fujitsu Corporation

Calvin Wan

Kumaravel Senthivel

Stephen John Unger

Nimer Yaseen

Bijendra Singh

Albert Vinson Smith, Jr

Ronald Paul Folkes

Chenjiang Hu

Chandra Ganesh

Max Simmons

Jacky Kuo

Vamseedhar Reddyvariraja

Xi Liu

Muhammad Sakhi Sarwar

Virgil Vladescu

Catherine Yuan

Sanjay Gera

David Joseph Haas

Swati Mittal

Abirami Sathyamoorthy

Vijay Khopade

Arindam Paul

Jian-Lin Mu

Badrinath Natarajan

Jeffrey Holt

Chandrasekaran Ganesh

Basavaraj Menasinahal

Kentaro Nakamura

Malleswaraprasad Sunkara

Dave Howell

According to an aspect of an embodiment, operations may include receiving a first Ethernet signal having a first data rate less than a second data rate, the second data rate being a ZR data rate. The operations may also include dividing the first Ethernet signal into a plurality of first-signal sub-signals that each have a third data rate that is less than the first data rate. Moreover, the operations may include generating a second Ethernet signal having the second data rate, the generating of the second Ethernet signal being based on the plurality of first-signal sub-signals such that the second Ethernet signal includes the plurality of first-signal sub-signals. Further, the operations may include providing the second Ethernet signal to a ZR network such that the second Ethernet signal is a ZR signal.

Channelized transmission over openZR-extended optical network

A computational method and system for estimating port delays in a network may use a data-driven estimation with quadratic programming based on available network path data that is already collected. In this manner, port delays for each individual port in the network may be estimated without having to measure each individual port using sensors.

Data-driven estimation of network port delay

A computational method and system for identifying bad ports in a network may use a neural network learning function based on available network path data that is already collected. In this manner, bad ports in the network may be identified without having to measure each individual port using sensors.

Neural network learning methods to identify network ports responsible for packet loss or delay

A method and system for performing synthetic loss measurements (SLM) includes methods for single-ended and dual-ended synthetic loss measurements. The methods include maintaining a session number indicative of a physical network component at each maintenance point used to perform synthetic loss measurements. The session numbers are maintained according to a novel protocol and are used to detect a change in the network component, such as resulting from a protection switch event. The session numbers enable the synthetic loss measurements to continue irrespective of changes in the values for the session numbers and to remove errors when computing frame loss that may arise when physical network components change. The disclosed methods and systems may be used when a link aggregation group exists between a local maintenance point and a remote maintenance point.

Synthetic loss measurements using session numbers

A method may include receiving, at a network interface of a first network element, an Internet Group Management Protocol (IGMP) message from a second network element. The method may also include updating first multicast group data associated with the network interface based on the received IGMP message, the first multicast group data including one or more entries setting forth a multicast group and one or more other network elements which are members of the multicast group. The method may additionally include determining whether the second network element is the sole member of its multicast group based on the IGMP message and the first multicast group data. The method may further include forwarding the IGMP message to a switching element of the first network element in response to determining that the second network element is the sole member of its multicast group, the switching element communicatively coupled to the network interface.

System and method for distributed internet group management protocol processing

A method may include determining a first number of events occurring during a first threshold detection duration. The method may further include causing processing of events to cease for a particular throttling duration in response to determining that the first number of events occurring during the threshold detection duration is greater than a predetermined threshold. The method may also include determining a second number of events occurring during a second threshold detection duration. Additionally, the method may include, in response to determining that the first number of events occurring during the first threshold detection duration is greater than the predetermined threshold and that the second number of events occurring during the second threshold detection duration is greater than the predetermined threshold: increasing the time of the particular throttling duration; and causing processing of events to cease for the increased particular throttling duration.

Method and system for interrupt throttling and prevention of frequent toggling of protection groups in a communication network

In accordance with embodiments of the present disclosure, a method is provided for communicating multicast traffic. The method may include in response to receipt of multicast control traffic at a network element to be communicated to a protection switching group, communicating the multicast control traffic to each of a working path and a protection path of the protection switching group. The method may also include in response to receipt of multicast control traffic via either of the working path and the protection path, processing the multicast control traffic as if the multicast control traffic was received via both the working path and the protection path.

Method and system for communicating multicast traffic over protected paths

In accordance with embodiments of the present disclosure, a method may include designating one of at least one maintenance point associated with a physical port of a line card as a primary maintenance point, the primary maintenance point comprising either a UP-Maintenance Entity Group End Point (UP-MEP) or one Maintenance Entity Group Intermediate Point (MIP). The method may also include configuring the line card such that the line card stores source addresses of Service Operation, Administration, and Management (SOAM) frames communicated by the primary maintenance point. The method may further include configuring the line card such that the line card does not store source addresses of Service Operation, Administration, and Management frames communicated by maintenance points associated with the physical port other than the primary maintenance point.

Systems and methods for implementing service operation, administration, and management for hairpinned ethernet services

According to one embodiment, a method may include communicating an alarm suppression indication trigger message from a maintenance end point to an alarm indication suppression generator. The method may further include communicating, by the alarm indication suppression generator in response to receiving the alarm indication trigger message, an alarm indication suppression message to at least one flow point that has alarm indication suppression enabled for the maintenance end point such that the alarm indication suppression message is received by at least one other maintenance end point upstream of the maintenance end point.

Systems and methods for transmission of trigger-based alarm indication suppression messages

A method and system for masking defects within a network are disclosed. In accordance with an embodiment of the present invention, a method for masking defects within a network comprises detecting by a service entity defects within a network. The method further comprises determining a number of detected defects associated with a network component included in the network. The method further comprises generating by the network component a summary alarm if the number of detected defects within the network is greater than a first threshold.

Method and system for masking defects within a network

A method and system for reporting defects within a network are disclosed. In accordance with an embodiment of the present invention, a method for reporting defects within a network comprises generating a summary alarm by a network element based on defects detected within a network. The method further comprises receiving at the network element a first request for the detected defects within the network from a network management system in response to generation of the summary alarm. The method further comprises reporting the detected defects by the network element in response to the first request from the network management system.

Method and system for reporting defects within a network

According to one embodiment, a method may include instantiating a first maintenance end point on a first port of a first network element. The first maintenance end point may determine whether a heartbeat message has been received from a second maintenance end point instantiated on a second port of a second network element. In response to determining that the heartbeat message has been received, the maintenance end point may analyze the heartbeat message to determine an identifier for the second network element and an identifier for the second port. Based on the determination of the identifier of the second network element and the identifier of the second port, the network element may store information to an adjacency list, the information indicating at least one of an adjacency of the first port to the second port and an adjacency of the first network element to the second network element.

Systems and methods for discovery of network topology using service OAM

According to one embodiment, a method for processing heartbeat messages includes processing heartbeat messages received at a first network interface integral to a first network element from a second network element to determine a first status parameter associated with the second network element. The method may also include processing heartbeat messages received at a second network interface integral to the first network element from the second network element to determine a second status parameter associated with the second network element. The method may further include determining a status of the second network element based on the first status parameter and the second status parameter.

Systems and methods for processing heartbeat messages

In one embodiment, correlating label switched paths of a pseudowire includes receiving a first message at a second label switching router. The first message is sent from a first label switching router and includes a pseudowire identifier and a first label switched path identifier. The pseudowire identifier identifies a pseudowire, and the first label switched path identifier identifies a first label switched path that implements the pseudowire. A second message is sent from the second label switching router to the first label switching router. The second message comprises the pseudowire identifier and a second label switched path identifier. The second label switched path identifier identifies a second label switched path that implements the pseudowire.

Growing community of inventors

Plano, TX, United States of America

Calvin Wan