Assignee: Tellabs Operations, Inc.

Location: Naperville, IL
No. of patents: 200

Number	Title	Issue Date
8179887	Method and apparatus for improving performance of TDM sequencing for packet processing engines using a delay line A network system, having an array of processing engines (“PEs”) and a delay line, improves packet processing performance for time division multiplexing (“TDM”) sequencing of PEs. The system includes an ingress circuit, a delay line, a demultiplexer, a tag me...	05/15/2012
8179785	Deterministic switching protection over aggregated links An apparatus and method for improving network efficiency during an automatic switchover are disclosed. Upon receipt of a switching request from a first network peer (“NP”) transmitted via a connection containing multiple links, a process capable of providing aut...	05/15/2012
8169915	Method and apparatus for network load balancing using indirection RAM during classification An apparatus and a method for load balancing across multiple routes using an indirection table and hash function during a process of packet classification are disclosed. A network device such as a router includes a memory, a hash component, and a result memory. The ...	05/01/2012
8165468	Methods and apparatus for performing directionless wavelength addition and subtraction within a ROADM based optical node In today's reconfigurable optical add/drop multiplexer (ROADM) based optical node, transponders associated with the ROADMs' add/drop ports are dedicated to a given network node interface. Dedicated transponders reduce the flexibility to route around network failures...	04/24/2012
8139471	Apparatus and method for clock synchronization in a multi-point OFDM/DMT digital communications system A multi-point communications system is set forth herein. The communications system comprises a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a transmission medium. The OFDM/DMT symbols are generated using at least one timin...	03/20/2012
8135002	Method and apparatus for horizontally slicing a multi-stage switch fabric A method and apparatus are provided for horizontally slicing a multi-stage switching fabric having transmission inputs and transmission outputs to and from the switch fabric. The switching fabric includes switch elements arranged in at least first and second stages,...	03/13/2012
8134939	Multichannel ring and star networks with limited channel conversion A ring communication network according to an embodiment of the present invention includes a plurality of nodes in which a single one of the nodes is configured for full channel conversion and the remaining nodes, other than the single node, are configured for no cha...	03/13/2012
8130637	Method and apparatus for detecting MPLS network failures 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 h...	03/06/2012
8125891	Method and system for multi-layer network routing Each node of a telecommunications network determines a connection type attributes available for each signal type supported by the node. Each signal type represents a different connection routing layer within the telecommunications network. Adaptation costs involved ...	02/28/2012
8116629	Reconfigurable optical add drop multiplexer core device, procedure and system using such device, optical light distributor, and coupling-ratio assigning procedure A reconfigurable optical add drop multiplexer core device includes a light distributor, a light combiner, and first and second sets of add and drop ports. The light distributor is configured to receive an optical signal along a primary input of the reconfigurable op...	02/14/2012
8102928	Spectrally constrained impulse shortening filter for a discrete multi-tone receiver A channel in a multiple carrier communication system is equalized by computing a target 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 t...	01/24/2012
8095374	Method and apparatus for improving the quality of speech signals An embodiment of the present invention is a method and apparatus for extending bandwidth of a speech communication beyond a band-limited region to which the speech communication may be otherwise constrained. Such embodiments may be used to provide higher fidelity sp...	01/10/2012
8095007	Optical add/drop multiplexer using integrated optical components An optical add/drop multiplexer incorporates an integrated receiver module and an integrated transmitter which are interfaced to an intervening electrical network to provide an add/drop/pass-through functionality. The receiver module incorporates a wavelength demult...	01/10/2012
8081639	Method and apparatus for supporting client data transport with timing transparency Clock recovery is used in a variety of communications network applications to enable nodes using different clocks to operate in an effectively synchronized manner. Example embodiments of the present invention include an apparatus and corresponding method for support...	12/20/2011
8078435	Method and apparatus for designing any-to-any optical signal-to-noise ratio in optical networks Optical regeneration is expensive to implement and maintain. A method or corresponding apparatus in an example embodiment of the present invention enables a user to plan an optical regeneration in a network with a reduction of optical regeneration compared to unplan...	12/13/2011
8059549	Method and apparatus for supporting network communications using point-to-point and point-to-multipoint protocols Methods and apparatuses are disclosed for interworking a first protocol, e.g., Provider Backbone Bridge Traffic Engineering (PBB-TE), that provides Ethernet carrier-class traffic engineering, with a second protocol, e.g., Virtual Private LAN Service, that emulates l...	11/15/2011
8050288	Method and apparatus for interference suppression in orthogonal frequency division multiplexed (OFDM) wireless communication systems A method and apparatus for interference suppression in wireless communication systems, especially Orthogonal Frequency Division Multiplexed (OFDM) systems. The array apparatus includes a two-tier adaptive array system which provides for both spatial diversity and be...	11/01/2011
8041219	Optical network element with Brillouin effect colorless wavelength shift A method of optical communication includes generating an amplified optical signal from at least a portion of a first optical signal having a first carrier wavelength, λ1. The amplified optical signal is applied to Brillouin media to stimulate generation ...	10/18/2011
8036114	Bi-directional ring network having minimum spare bandwidth allocation and corresponding connection admission control The present invention provides for a method for reserving spare bandwidth for a link in a communication network including a plurality of links. The method provides for monitoring the volume of traffic routed through each link of the communication network. A single l...	10/11/2011
8032366	Method and apparatus for low bit rate speech coding detection To increase channel capacity, mobile phone carriers have deployed speech coders, such as Advanced MultiBand Excitation coding (AMBE), in networks to reduce the bit rate of each call. One undesired consequence of employing such speech coders is that the voice quality...	10/04/2011
8032365	Method and apparatus for controlling echo in the coded domain A method and corresponding apparatus for coded-domain acoustic echo control is presented. An echo control problem is considered as that of perceptually matching an echo signal to a reference signal. A perceptual similarity function that is based on the coded spectra...	10/04/2011
8031861	Communication system tonal component maintenance techniques An apparatus and method for suppressing noise is presented. The apparatus may utilize a filter bank of bandpass filters to split the input noisy speech-containing signal into separate frequency bands. To determine whether the input signal contains speech, DTMF tones...	10/04/2011
8018838	Apparatus and method for protection switching in a network A system supports 50 ms protection switching times independent of network architecture. The system includes multiple protection switch fabrics to perform facility protection switching for the signals and a central switch fabric to switch a subset of the signals in a...	09/13/2011
8010964	Methods for monitoring and managing processes Systems and methods are provided for managing process execution within an operating system. The systems and method store a process initialization file, preparing a process list of processes that can be controlled by an individual user, and monitoring execution of th...	08/30/2011
7983182	Methods and apparatus for exchanging network connectivity and capability information A method for managing transport node capability information includes discovering a link end of a local transport node, modelling the local transport node's capability information as a first set of information structures, discovering a neighbor transport node, establ...	07/19/2011
7957965	Communication system noise cancellation power signal calculation techniques In order to enhance the quality of a communication signal derived from speech and noise, a filter divides the communication signal into a plurality of frequency band signals. A calculator generates a plurality of power band signals each having a power band value and...	06/07/2011
7953306	Beam steering element with built-in detector and system for use thereof An all-optical cross-connect switching system provides optical switching that may reduce processing requirements by three orders of magnitude over conventional techniques by associating at least one optical detector with an optical beam steering element. In one embo...	05/31/2011
7945158	Transponder-less verification of the configuration of an optical network node A method, apparatus, and program, for evaluating an optical network node. The method comprises providing at least one communication path of the node with a capability by which lasing can occur in the communication path, and detecting whether lasing has been establis...	05/17/2011
7940786	System and method for communicating data using a common switch fabric A communication system includes a first ingress content processor that receives information associated with a first traffic type. The first ingress content processor places the information associated with the first traffic type into a system cell having a common sys...	05/10/2011
7940747	Method and apparatus for replacing lost PSTN data in a packet network An apparatus for replacing lost PSTN data in a packet network and for generating variable power white noise, includes a lost packet detection unit (402) for detecting lost data packets, a data processing unit (404) for producing in response a lost data...	05/10/2011
7916801	Time-domain equalization for discrete multi-tone systems A multiple carrier communication system includes a primary impulse shortening filter that receives an output signal of an analog to digital converter and accepts coefficients. A secondary impulse shortening filter receives the output signal of the analog to digital ...	03/29/2011
7916502	Stackable cable tray A cable tray is provided comprising a housing defining an interior portion, the housing having at least one positioned opening formed therein and also having plural, open ends in communication with the interior portion and the at least one positioned opening for pas...	03/29/2011
7898935	OFDM/DMT/digital communications system including partial sequence symbol processing A method of managing a signal over a symbol period includes supplying samples of the signal at beginning and end portions of the symbol period. The method further includes suppressing the supply of samples of the signal at a middle portion of the symbol period. ...	03/01/2011
7889675	Method and system for multi-layer network routing Each node of a telecommunications network determines interface point connection type attributes available for each signal type supported by the node. Each signal type represents a different connection routing layer within the telecommunications network. Adaptation c...	02/15/2011
7881568	Signal interconnect incorporating multiple modular units An interconnect element incorporates a plurality of smaller, substantially identical, interconnect modules. Multiple identical elements can in turn be combined to form larger interconnect networks. Signal paths in the elements can be implemented with optical fibers ...	02/01/2011
7881184	Reverse notification tree for data networks 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 h...	02/01/2011
7865078	Processing of optical performance data in an optical wavelength division multiplexed communication system Optical performance measurements are taken in an optical network and displayed in a form that allows an operator to enter fault information related to the measurements, or to automatically generate fault alarms to the operator, based on processing of the measurement...	01/04/2011
7859994	Method and apparatus to switch data flows using parallel switch fabrics A low-cost, high-speed data switching system and method uses several parallel switching systems or fabrics. In one of various embodiments, for example, the constituent data flows in a data stream can be selectively routed to a switching fabric that has the lowest in...	12/28/2010
7821946	Method and system for multi-layer network routing Each node of a telecommunications network determines a connection type attributes available for each signal type supported by the node. Each signal type represents a different connection routing layer within the telecommunications network. Adaptation costs involved ...	10/26/2010
7804767	Protection/restoration of MPLS networks 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 p...	09/28/2010

«First «Previous1 2 3 4 5 Next»Last»

PatentStorm

Bizarre Patents

PatentStorm News

Assignee: Tellabs Operations, Inc.