Patents Assigned to Tellabs Operation, Inc.
  • Patent number: 8934457
    Abstract: A method and apparatus for interference suppression in wireless communication systems, especially Orthogonal Frequency Division Multiplexed (OFDM) systems, is presented. The array apparatus includes a two-tier adaptive array system, which provides for both spatial diversity and beamforming at the uplink and includes sub-arrays spaced at a distance sufficient to provide spatial diversity and support beamforming or scanning. A Direction of Arrival (DOA) of signals impinging upon the array can be calculated by comparing signals from sub-array elements. Each sub-array can be filtered or beamformed to provide high gain to desired signals received from the DOA (which may be a multipath signal) while simultaneously dampening-out undesired signals, such as co-channel interference (CCI) in the frequency band of operation. The DOA is also used for allocating frequency bins for data signals, such as in an OFDM system, to provide weighted guidelines for bin allocation to maximize received signal power.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: January 13, 2015
    Assignee: Tellabs Operations, Inc.
    Inventors: Samir Kapoor, Daniel J. Marchok
  • Patent number: 8918088
    Abstract: A network configuration and method of delivering targeted advertisement during an audio broadcasting using a targeted radio advertisement manager (“TRAM”) are disclosed. A TRAM process for delivering targeted advertisement (“AD”) is able to receive a packet carrying identification (“ID”) identifying a radio and a time stamp associated with a tune-in broadcast station via a cellular communication network. After identifying at least one user associated with the radio, a user preference is determined in accordance with the user. After generating a set of targeted ads based on user preference, the set of targeted ads is forwarded to the radio. The targeted ads are selectively disseminated during commercial intervals between radio broadcasting in accordance with a predefined broadcasting schedule.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: December 23, 2014
    Assignee: Tellabs Operations, Inc.
    Inventors: Santhosh Kumar Thodupunoori, Sridharan Muthuswamy, Tony Johansson
  • Patent number: 8897145
    Abstract: Network service providers have largely addressed the growth in demand for communications networks in two ways: employing faster and more robust communications protocols through equipment upgrades and increasing use of Operations, Administrations, and Management (OAM) procedures for improved network performance. Typically, OAM operations procedures used by a network protocol are unique to that protocol and are not compatible with other network protocols. Service providers with networks that use multiple communications protocols, such as networks using legacy and newly installed equipment, can have difficulty ensuring optimal performance due to non-compatible OAM operations. A method, and corresponding apparatus, for supporting OAM interworking between first and second communications protocols used in an interworking circuit of a communications network is disclosed.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: November 25, 2014
    Assignee: Tellabs Operations, Inc.
    Inventors: William A. Kaufmann, Douglas J. Hawn, Chirayu A. Shah, Bruce M. Lasley, Ian P. Butler, Jason T. Ledgerwood Jesseph
  • Patent number: 8873956
    Abstract: Optical regenerators and amplifiers are expensive to implement and maintain. A method or corresponding apparatus in an example embodiment of the present invention relates to an optical planning tool that plans an optical network configuration by determining a plurality of costs for maintaining signal strength in corresponding network configurations including (i) a configuration of regenerators, (ii) a configuration of pre-or post-amplifiers, and (iii) a configuration of pre- and post-amplifiers in candidate locations and regenerator modules. The candidate locations for placing pre-or post-amplifiers are determined based on loss in each span, expected traffic patterns, and proposed regeneration locations along paths of expected traffic. The regeneration modules are located in locations determined based on the candidate locations. The example embodiment selects a configuration from among the network configurations as a function of the plurality of costs, helping reduce the cost of network deployment.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: October 28, 2014
    Assignee: Tellabs Operations, Inc.
    Inventor: Dion Kwun Kit Leung
  • Patent number: 8874437
    Abstract: Adaptive Gain Control (AGC) is performed directly in a coded domain. A Coded Domain Adaptive Gain Control (CD-AGC) system modifies at least one parameter of a first encoded signal, resulting in corresponding modified parameter(s). The CD-VQE system replaces the parameter(s) of the first encoded signal with the modified parameter(s), resulting in a second encoded signal. In a decoded state, the second encoded signal approximates a target signal that is a function of two signals, including the first encoded signal and a third encoded signal, in at least a partially decoded states. Thus, the first encoded signal does not have to go through intermediate decode/re-encode processes, which can degrade overall speech quality. Computational resources required for a complete re-encoding are not needed. Overall delay of the system is minimized. The CD-AGC system can be used in any network in which signals are communicated in a coded domain, such as a Third Generation (3G) wireless network.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: October 28, 2014
    Assignee: Tellabs Operations, Inc.
    Inventors: Rafid A. Sukkar, Richard C. Younce, Peng Zhang
  • Publication number: 20140307746
    Abstract: A network device such as a router or switch, in one embodiment, includes a timing analyzer which is capable of providing timing analysis over one or more network circuits. The timing analyzer, in one aspect, receives a data packet traveling across a circuit emulation service (“CES”) circuit such as T1 or E1 circuit. Upon obtaining an arrival timestamp associated with the data packet, the arrival timestamp is stored in a timestamp buffer in accordance with a first-in first-out (“FIFO”) storage sequence. After identifying the oldest arrival timestamp in the timestamp buffer, an offset is generated based on the result of comparison between the arrival timestamp and the oldest timestamp. The timing analyzer can also be configured to generate timing reports on-demand based on generated offset(s).
    Type: Application
    Filed: April 11, 2013
    Publication date: October 16, 2014
    Applicant: Tellabs Operations, Inc.
    Inventors: Anthony Leonard Sasak, Christopher V. O'Brien
  • Patent number: 8862869
    Abstract: A network system and method capable of implementing network initiated packet data protocol (“PDP”) context to enhance security of network communications are disclosed. An activation and/or modification request message containing security information element is generated and forwarded from a gateway general packet radio service support node (“GGSN”) to a serving general packet radio service support node (“SGSN”) requesting traffic security for a particular Internet Protocol (“IP”) session. After sending the activation/modification request message from SGSN to user equipment (“UE”), an IP session with PDP context encryption between the UE and a destination is initiated according to the security information element.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: October 14, 2014
    Assignee: Tellabs Operations, Inc.
    Inventor: Yee Ming Soon
  • Publication number: 20140304698
    Abstract: A method and/or network system is able to perform an in-service software upgrade (“ISSU”) using virtualization technology while ongoing network service is maintained. After receipt of an upgrade signal such as a command of software upgrade, a new or second virtual machine (“VM”) is created in response to the upgrade signal. After downloading the new version of program to the second VM while maintaining the first version of program running on the first VM, the process for providing network management begins to migrate from the first version of program to the new version of program. The process simultaneously facilitates ISSU for a data-path module such as a line card to convert from the previous version of software to the new version of the software.
    Type: Application
    Filed: May 29, 2014
    Publication date: October 9, 2014
    Applicant: Tellabs Operations, Inc.
    Inventors: Chakravarthi S. Chigurapati, Pawan Uberoy, Somnath Mani, Praveen Madhav, Duncan Stuart Ritchie, Sebastian Sapa
  • Patent number: 8842537
    Abstract: Disclosed herein are methods and calculators for configuring traffic allocations for service classes with different Quality of Service (QoS) in a router. Example embodiments involve setting allocations at a router based on traffic rate values and/or traffic weight values provided by a user. The router may monitor actual traffic rates to ensure that traffic is not being dropped due to improper rate allocations and to provide historical data for optimizing traffic allocations. In addition, the router may automatically adjust traffic allocations to avoid dropping high(er) priority traffic. The router may also transmit alarms to the user and/or to other network devices to prompt traffic re-routing and/or re-allocation of traffic rates. Example methods and apparatus ensure appropriate traffic allocation to meet certain QoS metrics.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: September 23, 2014
    Assignee: Tellabs Operations, Inc.
    Inventors: Leo S. Lee, Timothy E. Blair, David H. Liu
  • Patent number: 8842516
    Abstract: In a multi-protocol label system (MPLS) carrying data, a working path carries data from a starting point or node to a destination point or node via a working path. The working path includes the switches and physical media linking starting point and the destination point. MPLS system reliability is enhanced by way of a protection path, over which data can be carried from the starting point to the destination point upon a detected failure along the working path. Upstream messages inform one or more MPLS switching systems to make a switchover from a working path to a protection path.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: September 23, 2014
    Assignee: Tellabs Operations, Inc.
    Inventors: Kenneth R. Owens, Srinivas V. Makam, Changcheng Huang, Vishal Sharma
  • Publication number: 20140281715
    Abstract: Embodiments disclosed herein enable network simulation including a range of networking technologies to be scaled to include large numbers of devices under test (DUTs) even though computing resources, such as a total number of simulation hosts or IP addresses, may be limited. By enabling a network simulator to scale with limited computing resources, developers may be enabled to reduce the requirements for physical space, power, cost, and maintenance for network simulation. For example, developers may be able to determine capacity, such as a total number of DUTs that a network management system (NMS) is capable of managing, even though few simulation hosts or IP addresses may be available for simulation of the DUTs.
    Type: Application
    Filed: March 12, 2013
    Publication date: September 18, 2014
    Applicant: Tellabs Operations, Inc.
    Inventors: Hammad A. Khan, Li Zou, John Chan
  • Publication number: 20140254576
    Abstract: A mobile network configuration is able to offload packet flows based on identification (“ID”) rules to a wireless network using a deep packet inspection (“DPI”) function. After activating DPI function located in a packet data network gateway (“PDN-GW”), every packet flow passing through the PDN-GW is monitored, detected, and analyzed based on a set of predefined ID rules. Upon identifying a packet flow for a predefined network application, the packet flow is offloaded from a long term evolution (“LTE”) network to a wireless local area network (“WLAN”) or Wi-Fi network. To reduce traffic loading on the LTE network, the PDN-GW sends binding updates containing offloading information associated with the packet flow to user equipment (“UE”) for offloading implementation.
    Type: Application
    Filed: March 8, 2013
    Publication date: September 11, 2014
    Applicant: Tellabs Operations, Inc.
    Inventor: Subir Varma
  • Publication number: 20140254373
    Abstract: A communication network configured to substitute serving gateway (“SGW”), packet data network gateway (“PGW”), and mobility management entity (“MME”) with an OpenFlow network controller (“OFNC”) for packets routing between mobile devices and the Internet is disclosed. The network includes a cellular base station, a packet data network (“PDN”), and OFNC. The cellular base station provides wireless communication for user equipments (“UEs”). The PDN is able to route packet flows to their destination(s). The routing controller or OFNC manages a cluster of routers including at least one edge router via OpenFlow protocol. The OFNC, in one embodiment, establishes a routing path between the cellular base station and the PDN for an authenticated UE via a group of routers based on information obtained from an authenticating server and a charging system.
    Type: Application
    Filed: March 8, 2013
    Publication date: September 11, 2014
    Applicant: Tellabs Operations, Inc.
    Inventor: Subir Varma
  • Patent number: 8804485
    Abstract: In a telecommunications/data network, it is common to have multiple recovery domains each employing its own technique for recovering a fault that may be different from a technique employed by another domain. Permitting multiple recovery domains to recover a fault without coordination among the domains can result in adverse interactions, such as rapid and repeated changes in the actions taken or “flapping,” and repeated hits to traffic. A method and corresponding apparatus for coordinating fault recovery in a network, according to an embodiment of the present invention, notifies a first recovery domain that a second recovery domain is or is not taking action to recover a fault in the network. Coordinating the recovery efforts of the first and second recovery domains reduces fault recovery time and allows concurrent actions to be taken.
    Type: Grant
    Filed: November 3, 2011
    Date of Patent: August 12, 2014
    Assignee: Tellabs Operations, Inc.
    Inventors: Thomas J. Huber, Jonathan B. Sadler, Mark L. Jones
  • Patent number: 8792497
    Abstract: A network node or corresponding method of performing link aggregation reduces a number of Content Addressable Memory (CAM) entries required to make a forwarding decision for a given ingress flow, reducing cost, size, and power consumption of the CAM and accompanying static RAM. In one embodiment, an ingress flow is mapped to an egress flow identifier. Subsequently, the egress flow identifier is mapped to a member of an aggregated group associated with an egress interface based on information available in a given ingress flow. Finally, the given ingress flow is forwarded to the member of the aggregated group associated with the egress interface. A hashing technique or two lookups may be used alone or in combination in mapping the ingress flow to the egress flow identifier to reduce CAM memory usage.
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: July 29, 2014
    Assignee: Tellabs Operations, Inc.
    Inventors: Balaji Rajagopalan, Samer I. Nubani, Charles C. Park, Sirisha Paturi
  • Patent number: 8782632
    Abstract: A method and/or network system is able to perform an in-service software upgrade (“ISSU”) using virtualization technology while ongoing network service is maintained. After receipt of an upgrade signal such as a command of software upgrade, a new or second virtual machine (“VM”) is created in response to the upgrade signal. After downloading the new version of program to the second VM while maintaining the first version of program running on the first VM, the process for providing network management begins to migrate from the first version of program to the new version of program. The process simultaneously facilitates ISSU for a data-path module such as a line card to convert from the previous version of software to the new version of the software.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: July 15, 2014
    Assignee: Tellabs Operations, Inc.
    Inventors: Chakravarthi S. Chigurapati, Pawan Uberoy, Somnath Mani, Praveen Madhav, Duncan Stuart Ritchie, Sebastian Sapa
  • Patent number: 8750096
    Abstract: An apparatus and method for enhancing data integrity during router recovery using dual-homed host configuration are disclosed. A process of routing resumption, in one embodiment, is able to recover or reset a network element (“NE”) such as a primary router from system failure. A first link configured to transmit data packets between the NE and a network device is reestablished. Upon reestablishing a second link configured to transmit data packets between the NE and other NEs, a network discovery process utilizing network reachability protocol is initiated to identify routing paths associated with the NE. A routing table in the NE is updated in accordance with the routing paths. A ready message is issued from the NE to the network device when the routing table is at least partially completed.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: June 10, 2014
    Assignee: Tellabs Operations, Inc.
    Inventor: Sasha Cirkovic
  • Patent number: 8737776
    Abstract: Optical networks are increasingly employing optical network nodes having multiple interfaces to allow a node to direct optical signals received at any interface to any other interface connected to the node. Constructing a larger wavelength selective switching (WSS) module used in such a node can be complex and expensive. A method an apparatus for constructing a large WSS using parallelism is provided. In example embodiments, a larger WSS may include multiple parallel non-cascaded smaller WSSs and an optical coupler configured to optically couple the multiple parallel, non-cascaded smaller WSSs. This technique may be used to construct both N×1 and 1×N WSSs. Because the technique employs multiple parallel, non-cascaded WSSs, all inputs of a larger N×1 WSS and all outputs of a larger 1×N WSS are available receive or transmit external signals rather than being rather than being unavailable due to, for example, cascading smaller WSS devices together.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: May 27, 2014
    Assignee: Tellabs Operations, Inc.
    Inventor: Mark E. Boduch
  • Patent number: 8737203
    Abstract: Recovery time upon the failure of a link or switching system in an asynchronous data network can be minimized if downstream data switches provide upstream messages indicating to upstream switching system that the downstream traffic arrived in tact and was properly handled. Upon this loss or failure of the upstream status message to an upstream switching system, an upstream switching system can reroute data traffic around a failed link or failed switch with a minimal amount of lost data. The upstream status message is conveyed from a downstream switching system to an upstream switching system via a reverse notification tree data pathway. The reverse notification pathway is established by using a messaging protocol between network switches by which the working and protection paths, among other things, are established.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: May 27, 2014
    Assignee: Tellabs Operations, Inc.
    Inventors: Kenneth R. Owens, Srinivas V. Makam, Changcheng Huang, Vishal Sharma
  • Publication number: 20140129907
    Abstract: A multi-mode transmission unit processes data to form an error correction code in accordance with one of a plurality of selectable processes. The data, correction code and a process identifier can be transmitted to a receiving unit which can carry out error correction of the data in accordance with the identified process.
    Type: Application
    Filed: January 13, 2014
    Publication date: May 8, 2014
    Applicant: Tellabs Operations, Inc.
    Inventors: Weiying Cheng, Jeffrey E. Budill