Fujitsu Corporation

Catherine Yuan

Vikas Mittal

Sanjay Gera

David Solomon

Fredrick Gruman

Calvin Wan

Abinder S Dhillon

Muhammad Sakhi Sarwar

Biaodong Cai

Albert Vinson Smith, Jr

Maitreya Mukhopadhyay

Serdar Kiykioglu

Raghu Rajan

Albert V Smith, Jr

Daniel P Lyon

Vijay Khopade

Milind Kulkarni

Jeffrey Holt

David Traylor

Cong Deng

Kentaro Nakamura

Jun Chen

Malleswaraprasad Sunkara

Dave Howell

Yanbing Li

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 system and method for of pre-provisioning recovery paths in a mesh network including creating i) a working path between a head end NE and a tail end NE of the mesh network and ii) a recovery path between the head end NE and the tail end NE, wherein the working path and the recovery path include one or more intermediate NEs; provisioning the working path in an activated state, including establishing cross connects of each of the NEs of the working path; provisioning the recovery path in a pending state, including establishing cross connects of each of the NEs of the recovery path; after provisioning the recovery path, detecting a failure along the working path, and in response, allocating and reserving link resources along the recovery path; and activating, by the NEs along the recovery path, cross connects of the recovery path into respective hardware associated with the NEs.

Provisioning recovery paths in a mesh network

Systems and methods for tunneling GCC0 bytes over an OTN transport network are disclosed. The method includes receiving, at a first network element, a first data frame comprising a set of management bytes and a set of data bytes, determining whether the set of management bytes should be tunneled, and, in response to determining that the management bytes should be tunneled, sending, to a second network element, a second data frame comprising the set of management bytes and the set of data bytes.

GCC0 tunneling over an OTN transport network

A network element is disclosed. In accordance with some embodiments of the present disclosure, a network element may comprise a network interface configured to communicatively couple to a network, and a controller communicatively coupled to the network interface. The controller may be configured to determine a delay-measurement interval, and to perform a plurality of delay measurements at a respective plurality of randomly determined times within the delay-measurement interval. Performing a delay measurement may comprise sending an outgoing signal, receiving an incoming signal, and determining a delay time based on the outgoing signal and the incoming signal.

Proactive delay measurement for optical transport network

The present disclosure may include a method to be performed by an electronic device in an optical network. The method may include generating a message associated with a slot and at least one connection identification (ID) corresponding to the slot. The message may include a slot counter region configured to identify the slot, a request region configured to activate a protect path utilizing the slot, a connection ID counter region configured to identify the at least one connection ID, and a status region configured to convey status of the at least one connection ID corresponding to the slot. The method may also include transmitting the message to other electronic devices in the optical network. The disclosure also includes associated systems and apparatuses.

Systems and methods of communicating path status in optical networks

A method of network communications includes determining an access identifier (AID) for an egress signal through a network interface of a network element, an Optical Transport Network (OTN) multiplexing structure identifier (MSI) associated with the egress signal through the network interface, another AID associated with a defined ingress signal through the network interface, another OTN MSI associated with the defined ingress signal through the network interface, and associating the egress signal and the defined ingress signal based on the AIDs and OTN MSIs. The first OTN MSI is not equal to the second OTN MSI.

Asymmetric OTN network traffic support

In accordance with embodiments of the present disclosure, a method for identifying a target signal in an optical transport network frame structure may be provided. The method may include determining an Access Identifier (AID) for the target signal. The method may also include determining at least one attribute for the target signal. The at least one attribute may define at least one of an Optical Transport Network (OTN) multiplexing structure associated with the target signal and one or more attributes associated with one or a higher order or an intermediate higher order optical data unit entity for a supporting entity of a lower order optical data unit associated with the target signal. The method may further include identifying the target signal based on the AID and the at least one attribute.

System and method for identifying a target signal in an optical transport network frame structure

Systems and methods for identifying a fault location in an optical network are disclosed. In accordance with one embodiment of the present disclosure, a method for identifying a fault location in an optical network comprises monitoring, by a network element, an eastward optical path and a westward optical path for faults. The method further comprises transmitting, by the network element, a first data packet along the eastward path and a second data packet along the westward path. The first and second data packets comprise an eastward fault indicator and a westward fault indicator comprising information associated with any eastward or westward faults occurring on the eastward or westward paths. The fault indicators indicate the existence of an eastward or westward fault and the network element that detected the fault.

Identifying fault locations in a network

Determining an active/standby state for an interface unit includes determining an entity active/standby state for each entity of one or more entities of the interface unit. If each entity active/standby state is standby, then an aggregated active/standby state of the interface unit is established to be standby.

Growing community of inventors

Plano, TX, United States of America

Catherine Yuan