Patents Assigned to Tellabs Operation, Inc.
  • Patent number: 9083551
    Abstract: A method or corresponding apparatus is employed for distributing media on a ring network. Multiple nodes and communications links are configured to distribute media in the ring network. Distribution of the media is disabled on a communications link between a selected pair of adjacent nodes in the ring network in a manner maintaining communications between the selected pair of adjacent nodes other than for distribution of the media. This configuration results in a “horseshoe” topology of the ring network with respect to the media, where distribution of the media on the ring network occurs in one or two downstream directions from head-end ingress node(s) on the ring network. Virtual Private LAN Service (VPLS) may be employed to transport the media. In an event of a link or node failure, the disabled link is enabled, allowing for continued distribution of the media with network recovery in a timeframe typically unobservable by an end user.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: July 14, 2015
    Assignee: Tellabs Operations, Inc.
    Inventors: Sanjay Khanna, Ravi Medikonda, Granville D. Dillon
  • Patent number: 9083641
    Abstract: A network processing device having multiple processing engines capable of providing multi-context parallel processing is disclosed. The device includes a receiver and a packet processor, wherein the receiver is capable of receiving packets at a predefined packet flow rate. The packet processor, in one embodiment, includes multiple processing engines, wherein each processing engine is further configured to include multiple context processing components. The context processing components are used to provide multi-context parallel processing to increase throughput.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: July 14, 2015
    Assignee: Tellabs Operations, Inc.
    Inventors: Naveen K. Jain, Venkata Rangavajjhala
  • Publication number: 20150188803
    Abstract: A network element includes a processor that is configured to receive a request for performing an administratively-requested reroute (ARR) on a network. The ARR includes at least a first data plane operation on the network element and a second data plane operation on another network element. The network element is also configured to determine whether it is capable of performing the first data plane operation without interrupting network traffic on that network element. The network element is further configured to determine whether the other network element is capable of performing the second data plane operation without interrupting network traffic on that network element.
    Type: Application
    Filed: December 26, 2013
    Publication date: July 2, 2015
    Applicant: Tellabs Operations, Inc.
    Inventors: Yufeng Li, Eric L. Chan
  • Patent number: 9071460
    Abstract: A network method and apparatus configured to increase bandwidth efficiency using multiple packets cells (“MPC”) is disclosed. MPC, in one embodiment, includes a header, a payload, a first cell packet indicator (“CPI”) and a second CPI. The first CPI includes a first start of packet (“SOP”) field, a first end of packet (“EOP”) field, and a first length field. The first SOP field is used to indicate that the payload contains the first portion of a first packet and the first EOP field indicates that the payload contains the last portion of the first packet. The first length field indicates total number of bytes associated with the first packet that are stored in the payload. Similarly, the second CPI includes a second SOP field, a second EOP field, and a second length field, and it is used to track the second packet.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: June 30, 2015
    Assignee: Tellabs Operations, Inc.
    Inventors: Thayl Zohner, David George Rancich, Adam Goldstein
  • Patent number: 9065759
    Abstract: The embodiments disclosed herein provide a mechanism for sharing protection resources in an arbitrary network topology involving pre-computing the protection resources so that data-plane-based protection can be used to activate the protection resources upon detection of a failure, thus, providing faster switching times than typical control-plane-based solutions. This is accomplished by configuring a mesh network to include, for a working path in the network, one or more protection paths with the same end nodes as the working path, where each protection path includes at least one intermediate node that is not part of the working path. The intermediate node accepts a protection request from one of the end nodes and determines whether a local resource for a protection path is available.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: June 23, 2015
    Assignee: Tellabs Operations, Inc.
    Inventors: Weiying Cheng, Jonathan B. Sadler, Thomas J. Huber, Anoop John Mathew
  • Publication number: 20150131993
    Abstract: A communications network, in one embodiment, includes a passive optical network (“PON”) network, user equipment (“UE”), and optical network terminal (“ONT”) plug to facilitate data transfer via an optical network. The PON network containing at least one fiber splitter and one optical line terminal (“OLT”) is capable of transmitting optical data. The UE having a high-speed electrical (“HSE”) port is able to process information based on electrical signals received from the HSE port. The ONT plug, in one embodiment, includes a modular electrical connector, a signal converter, and an optical and power hybrid (“OPH”) interface. The modular electrical connector contains at least eight (8) electrical contacts with eight (8) positions and can be inserted into the HSE port. The signal converter is used to convert optical signals received from the optical interface to electrical signals.
    Type: Application
    Filed: November 12, 2013
    Publication date: May 14, 2015
    Applicant: Tellabs Operations Inc.
    Inventor: Craig Lawrence Lutgen
  • Patent number: 9025615
    Abstract: Service providers can reduce multiple overlay networks by creating multiple logical service networks (LSNs) on the same physical or optical fiber network through use of an embodiment of the invention. The LSNs are established by the service provider and can be characterized by traffic type, bandwidth, delay, hop count, guaranteed information rates, and/or restoration priorities. Once established, the LSNs allow the service provider to deliver a variety of services to customers depending on a variety of factors, for example, a customer's traffic specifications. Different traffic specifications are serviced on different LSNs depending on each LSN's characteristics. Such LSNs, once built within a broadband network, can be customized and have its services sold to multiple customers.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: May 5, 2015
    Assignee: Tellabs Operations, Inc.
    Inventors: Michael Kazban, Mitri Halabi, Ken Koenig, Vinai Sirkay
  • Patent number: 9025465
    Abstract: To perform protection switching between tunnels in a network, Y.1731-based APS messages are often sent from a management system to nodes at the tunnels' end-points. If the management system is located near one node (local node) and far away from the other node (remote node), the APS message, which operates at the Ethernet service layer, travels to the remote node slower than traffic over the tunnels. This slower transmission time may prevent the remote node from performing a switch within a desired timeframe. The disclosed embodiments include a 1:1 bidirectional VLAN-based protection arrangement that accomplishes a 50 millisecond switching time without using Y.1731-based APS messages. The embodiments accomplish this by sending a switching command from the management system to the local node and modifying a message already traveling from the local node to the remote node to include a switching message that causes the remote node to perform the switch.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: May 5, 2015
    Assignee: Tellabs Operations, Inc.
    Inventors: Weiying Cheng, Chris R. Zettinger, Thomas T. Rarick
  • Patent number: 9020365
    Abstract: Current optical networks are engineered to handle amplifier noise and chromatic dispersion. Polarization mode dispersion occurs in optical networks due splitting of the light energy of a pulse propagating in a fiber into two modes. Compensating for polarization mode dispersion is a difficult and expensive task and hence only few commercial systems have been deployed to deal with this issue. A polarization mode dispersion compensation module according to an example embodiment of the present invention compensates for polarization mode dispersion by determining a performance metric related to an error rate of an optical signal in at least one polarization mode in a filtered state. Based on the performance metric, a control vector is determined to control the optical signal in the at least one polarization mode in the filtered state. The control vector is then applied to a polarization effecting device to compensate for polarization mode dispersion.
    Type: Grant
    Filed: April 8, 2008
    Date of Patent: April 28, 2015
    Assignee: Tellabs Operations, Inc.
    Inventors: Richard C. Younce, Julia Y. Larikova
  • Patent number: 9014250
    Abstract: A channel in a multiple carrier communication system is equalized by computing a desired spectral response, shortening the impulse response of the channel so that a significant part of an energy of the impulse response is confined to a region that is shorter than a target length and filtering the signal based on the desired spectral response. A multiple carrier communication system may include a primary impulse shortening filter that receives an output signal of an analog to digital converter and accepts coefficients. A secondary impulse shortening filter may receive the output signal of the analog to digital converter, output an output signal, and pass coefficients to the primary impulse shortening filter. A reference signal generator may output a reference signal. A comparator may compare the output signal and the reference signal and output a resulting error signal. An adaptive processor may compute coefficients for the secondary impulse shortening filter based on the error signal.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: April 21, 2015
    Assignee: Tellabs Operations, Inc.
    Inventors: Gopal Harikumar, Daniel J. Marchok, Kenneth J. Rudofski
  • Patent number: 8972561
    Abstract: An apparatus and method for transferring information in bulk between network devices employing File Transfer Protocol (“FTP”) are disclosed. During a network discovery process, an Element Management System (“EMS”) initiates a file generation command formatted with Simple Network Management Protocol (“SNMP”) to one or more network element (“NE”). After obtaining configuration information from one or more network devices, an NE, in one embodiment, establishes a file containing the configuration information and subsequently stores the file in a storage location. The file formatted in SNMP format is forwarded to EMS suing FTP/SFTP (secure file transfer protocol)/TFTP (trivial file transport protocol).
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: March 3, 2015
    Assignee: Tellabs Operations, Inc.
    Inventors: Gilbert Levesque, Debashis Dey, Prakash Giri, Malyadri Jaladanki, Yi Wang
  • Patent number: 8964525
    Abstract: Embodiments of the present invention illustrate a network configuration having a subscriber node, a multiservice router (“MSR”), and an edge router, wherein the MSR is able to provide end-to-end fault notifications across a multiservice environment. The MSR, for example, provides a process capable of translating a fault notification between two or more protocols. Upon receipt of a first fault notification formatted in a first protocol over a first circuit from a subscriber node, MSR translates the first fault notification to a second fault notification which is formatted in the second protocol. The first protocol and second protocol are different protocols. The second fault notification is subsequently sent from the MSR to an edge router via a second circuit.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: February 24, 2015
    Assignee: Tellabs Operations, Inc.
    Inventors: Gowri Kuthanur, James L. Brede
  • Patent number: 8965220
    Abstract: A reconfigurable optical add drop multiplexer (ROADM) includes local interfaces at which optical signals of different wavelengths are locally input into the ROADM, and a network interface configured to connect the ROADM to a network from which multiplexed optical signals of different wavelengths are transmitted to the network. In a first configuration, the ROADM is configured to transmit from the network interface to the network multiplexed signals of different wavelengths having a first minimum frequency difference. In a second configuration, the ROADM is configured to transmit from the network interface to the network multiplexed signals of different wavelengths having a second minimum frequency difference. The second minimum frequency difference is greater than the first minimum frequency difference. This arrangement reduces the power of four wave mixing cross products produced when optical signals of three wavelengths are multiplexed and transmitted from the ROADM to NZDSF or DSF fiber types.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: February 24, 2015
    Assignee: Tellabs Operations, Inc.
    Inventors: Julia Y. Larikova, Richard C. Younce, Mark E. Boduch
  • Publication number: 20150050022
    Abstract: One embodiment of the present invention illustrates a high-speed PON converter (“HPC”) configured to be a pluggable high-speed PON conversion device used for coupling a user equipment (“UE”) to an optical network. HPC, in embodiment, includes a passive optical network (“PON”) interface, a high-speed electrical (“HSE”) interface, and a conversion component. The PON interface, which is coupled to an optical network via an optical fiber, is able to receive optical information from the optical fiber. The HSE interface is configured to be pluggable to the UE, such as a personal computer (“PC”), laptop, or tablet via a predefined removable connector. The conversion component converts and transmits signals between the HSE and PON interfaces.
    Type: Application
    Filed: August 15, 2013
    Publication date: February 19, 2015
    Applicant: Tellabs Operations Inc.
    Inventors: Vincent P. Loredo, JR., Leslie Robert Murray
  • Patent number: 8944896
    Abstract: An apparatus, system, and method are provided for venting an enclosure, such as a chassis housing electronic equipment. The method includes receiving, at least one air directing surface, airflow moving in a first direction, the at least one air directing surface being disposed externally from the chassis at a predetermined placement relative to the at least one ventilation surface in a path of the airflow. The at least one air directing surface has a configuration to alter the direction of the airflow between the air directing surface and the at least one ventilation surface. The method also includes redirecting the airflow between the at least one air directing surface and the at least one ventilation surface to at least a second direction using the air directing surface.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: February 3, 2015
    Assignee: Tellabs Operations, Inc.
    Inventors: David J. Womac, Kimon Papakos, Scott A. Blakemore
  • Patent number: 8949165
    Abstract: A method, apparatus, system, and computer program, for operating a network planning tool. The method includes recognizing at least one predetermined criteria being satisfied or triggered, and learning at least one network attribute, to be used in subsequent network planning. Various types of network attributes can be learned, such as, e.g., network element parameters, site parameters, link parameters, demand parameters, optical parameters, general parameters, and networking parameters. Example attributes may specify, e.g., a maximum number of add/drop channels, at least one alarm threshold, a maximum number of sites per network ring, a maximum number of add/drop sites per ring, and a maximum ring circumference. Others can specify a maximum light path distance, a routing tendency, at least one grooming node, or the like.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: February 3, 2015
    Assignee: Tellabs Operations, Inc.
    Inventors: David W. Jenkins, Thomas T. Rarick
  • Patent number: 8947999
    Abstract: Example embodiments of a method and corresponding apparatus for sharing protection resources in a reconfigurable optical add-drop multiplexer (ROADM) based mesh network are presented. The use of dedicated 1+1 methodologies for protection in a mesh network is reliable, but requires a large amount of equipment redundancy, as well as a large associated cost. According to the embodiments of the present method and apparatus, the total number of protection transponders needed to support single failures in a mesh network is reduced by implementing a preconfigured protection cycle (p-cycle) in the mesh network and configuring nodes along the p-cycle to share protection transponders. Accordingly, the embodiments of the present method and apparatus allow for reliable protection against single failures while lessening the amount of equipment redundancy and reducing the associated cost.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: February 3, 2015
    Assignee: Tellabs Operations, Inc.
    Inventor: Dion Kwun Kit Leung
  • Publication number: 20150032834
    Abstract: Multiple physical NEs may be presented to a network carrier as a single logical NE comprising multiple physical NEs. Alarms between the multiple physical NEs may be treated as internal connection alarms of the single logical NE instead of endpoint alarms of the multiple physical NEs. A number of alarms in the network may be reduced as well as alarm processing of the alarms at an Operational Support System (OSS), effectuating scaling of alarms as well as relaxing resource requirements (e.g., compute power, memory, etc.) of the OSS.
    Type: Application
    Filed: July 29, 2013
    Publication date: January 29, 2015
    Applicant: Tellabs Operations, Inc.
    Inventor: Eric L. Chan
  • Patent number: 8942558
    Abstract: Due to demand for more network bandwidth, a need for multi-user optical network topologies has, and will continue to, increase. A method or corresponding apparatus in embodiments of the present invention provide for an availability determination tool for determining and displaying wavelength and subrate availabilities within a network. Benefits of embodiments of a tool include allowing a user to identify the availability and capacity of any wavelength on any network, via an interactive graphical user interface, such as by using three-dimensional representations. In one embodiment, the disclosed availability determination tool allows users to locate and view any combination of available wavelengths between nodes in an optical network topology, and generate graphical and tabular reports of the availability in order to maintain an efficient and organized method or apparatus for determining and controlling wavelengths in a network.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: January 27, 2015
    Assignee: Tellabs Operations, Inc.
    Inventors: David W. Jenkins, Ramasubramanian Anand, Hector Ayala, Dion Kwun Kit Leung, Kenneth M. Fisher
  • Patent number: 8937964
    Abstract: Packets having at least one cell are switched using input queues, output queues, a switch fabric, and a controller. Each input queue stores cells to be switched, and each output queue stores switched cells. The switch fabric couples the input queues to the output queues and has memory. The switch fabric stores cells moved from the input queues to the switch fabric and stores cells based on the output queues. The controller couples to the input queues and the switch fabric and determines input priorities for cells moving from the input queues to the switch fabric and output priorities for cells moving from the switch fabric to the output queues.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: January 20, 2015
    Assignee: Tellabs Operations, Inc.
    Inventors: Robert B. Magill, Kenneth P. Laberteaux