| Patent Number |
Title Of Patent |
Date Issued |
| 7627245 |
System and method for re-using wavelengths in an optical network |
December 1, 2009 |
| A network design that reduces the number of wavelengths needed to support communications in a Wavelength Division Multiplexing (WDM) network is disclosed. Wavelengths are reused in isolated sub-networks that do not share common network paths, allowing for the reduction in cost of the WDM |
| 7623744 |
Methods and apparatus to make substantially uniform losses in optical cross connects |
November 24, 2009 |
| A method for cross connecting optical signals includes using a common beam steerer to direct a set of optical signals from a set of input ports to a set of output ports. The method further includes adjusting a curvature of the common beam steerer so that paths of the optical signals have |
| 7616558 |
Reduction of the transport capacity of a virtual concatenation group |
November 10, 2009 |
| The transport capacity of a Virtual Concatenation Group (VCG) can be reduced under control of a Link Capacity Adjustment Scheme (LCAS). The VCG comprises link members, in which payload data are transmitted. A first control message comprising a fail message (R.sub.FAIL) for a link mem |
| 7616553 |
Apparatus and method for clock synchronization in a multi-point OFDM/DMT digital communications |
November 10, 2009 |
| 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 timing signal. At least |
| 7613392 |
1:N protection in an optical terminal |
November 3, 2009 |
| A communication network comprising at least one first terminal, at least one second terminal, a plurality of links, and at least first and second nodes. The first node is bidirectionally coupled to the first terminal through at least a first one of the links, and also is bidirectionally |
| 7613102 |
Apparatus and method for clock synchronization in a multi-point OFDM/DMT digital communications |
November 3, 2009 |
| 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 timing signal. At least |
| 7606180 |
Multichannel ring and star networks with limited channel conversion |
October 20, 2009 |
| 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 channel conversion. L |
| 7602698 |
Systems and methods for providing multi-layer protection switching within a sub-networking conne |
October 13, 2009 |
| A sub-network system includes line modules configured to receive bridged traffic signals over individual corresponding channels. The line modules are grouped into sets at a lower protection layer and an upper protection layer. The line modules are activated/deactivated based on different |
| 7585115 |
Bezel for fiber optic components |
September 8, 2009 |
| A bezel for facilitating the connection between an external device positioned on one side of a communication panel and a module located on the other side of the panel where the panel has an opening for receiving the bezel. The bezel includes a housing defining an interior portion of |
| 7564305 |
System and method for self-cancellation of N.sup.th-order intermodulation products |
July 21, 2009 |
| A method for reducing distortion in a nonlinear device whereby n.sup.th-order intermodulation products are canceled. A test signal is applied to the input of the nonlinear device and amplitudes of n.sup.th- and m.sup.th-order intermodulation products are measured. Transfer function c |
| 7558481 |
Method for optimizing enhanced DWDM networks |
July 7, 2009 |
| An enhanced Dense Wave Division Multiplexing (DWDM) network is optimized through bundling subchannel traffic in DWDM channels at network nodes and "hubbing" the DWDM channels at nodes receiving a relatively higher volume of aggregate traffic than other nodes. The optimization can elimina |
| 7539148 |
Circuit integrity in a packet-switched network |
May 26, 2009 |
| Techniques for performing a continuity check operation include sending a pattern of bits over a packet network connection through a first interface on a packet network to a second interface on the packet network. The first interface is monitored for return of the pattern of bits over |
| 7529959 |
System and method for aligning data in a network environment |
May 5, 2009 |
| In a network environment, a first master timing generator generates a first frame reference signal and a second master timing generator generates a second frame reference signal. A first data source generates a first data source signal, a first frame source signal, and a first clock |
| 7529443 |
Beam steering element with built-in detector and system for use thereof |
May 5, 2009 |
| 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 embodiment, a first beam |
| 7502325 |
Method and system for managing networks, network fragments and subnetworks |
March 10, 2009 |
| A method and system are provided for verifying connectivity between monitoring points (MPs) within a network. The method comprises assigning, to each monitoring point, a unique MP ID and a unique sender MP ID and a unique receiver MP ID. Each sender MP ID uniquely identifying a sender MP |
| 7500066 |
Method and apparatus for sharing instruction memory among a plurality of processors |
March 3, 2009 |
| A multiprocessing apparatus includes a memory and a plurality (M) of processors coupled to share the memory. Access to the memory is time-division multiplexed among the plurality of processors. In one embodiment, a selected processor retrieves M words of instruction forming K instruc |
| 7484160 |
Systems and methods for delineating a cell in a communications network |
January 27, 2009 |
| A method of performing cell delineation in a communications network is described. The method includes providing a data cell defined based on a communications protocol. The data cell forms at least a portion of a data stream. The method further includes mapping the data cell into frames |
| 7471696 |
System and associated method for the synchronization and control of multiplexed payloads over a |
December 30, 2008 |
| A system and associated method for the synchronization and control of multiplexed payloads over a telecommunications network wherein the asynchronous timing relationships between multiplexed payloads having varied points of origin are retained subsequent to signal processing of the p |
| 7461003 |
Methods and apparatus for improving the quality of speech signals |
December 2, 2008 |
| Methods and apparatus to extend the bandwidth of a speech communication to yield a perceived higher quality speech communication for an enhanced user experience. In one aspect of the invention, for example, methods and apparatus can be used to extend the bandwidth of a speech communicati |
| 7450795 |
Signal interconnect incorporating multiple modular units |
November 11, 2008 |
| 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 or electrical conducto |
| 7450714 |
Echo canceller having improved non-linear processor |
November 11, 2008 |
| A non-linear processor for use in an echo canceller is set forth. The non-linear processor includes a center clipping digital filter receiving an echo compensated signal. The non-linear processor provides a center clipped output signal having non-linear thresholds at values of +T.sub |
| 7450713 |
Echo canceller employing dual-H architecture having improved non-linear echo path detection |
November 11, 2008 |
| An echo canceller circuit for use in an echo canceller system is set forth that provides sensitive non-linear echo path response detection. The echo canceller circuit comprises a first digital filter having non-adaptive tap coefficients to simulate an echo response occurring during a cal |
| 7440498 |
Time domain equalization for discrete multi-tone systems |
October 21, 2008 |
| 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 converter, outputs an |
| 7437048 |
Equipment bay cable management system |
October 14, 2008 |
| A cable management system is provided that is configured to be located between adjacent equipment racks, while being vertically oriented to extend upward along a narrow space between the adjacent equipment racks. The cable management system comprises a main panel extending along a ve |
| 7433908 |
Selective-partial-update proportionate normalized least-mean-square adaptive filtering for netwo |
October 7, 2008 |
| A reduced-complexity, fast converging adaptive filter may be used for network echo cancellation applications, including applications having sparse echo paths. The new filter, referred to as a selective-partial-update proportionate NLMS filter, may be based on a proportionate NLMS (PN |
| 7430242 |
Spectrally constrained impulse shortening filter for a discrete multi-tone receiver |
September 30, 2008 |
| 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 target length and f |
| 7424424 |
Communication system noise cancellation power signal calculation techniques |
September 9, 2008 |
| 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 corresponding to |
| 7412166 |
Pilot tones for optical signal wavelength identification and power measurement |
August 12, 2008 |
| A method of optical communication includes providing a plurality of optical signals each associated with a distinct channel of a composite optical signal. A unique pilot tone signature is superimposed on each channel. The spectral composition of each signature includes a plurality of |
| 7412125 |
Optical dispersion compensation |
August 12, 2008 |
| A method of providing dispersion compensation includes providing a dispersion signal indicative of an amount of dispersion for at least one channel of a multi-channel optical signal. A dispersion compensator is controlled in accordance with the dispersion signal to optically compensa |
| 7411463 |
Method, system, apparatus, and program for measuring the damping factor of an Nth order phase lo |
August 12, 2008 |
| A method for measuring the damping factor of an N.sup.th-order phase-locked loop, wherein N>1, and a system, apparatus, and program that operate in accordance with the method. The method includes applying a modulation source at an input to the phase-locked loop. The method also in |
| 7403610 |
Echo canceller employing dual-H architecture having split adaptive gain settings |
July 22, 2008 |
| An echo canceller circuit is set forth. The echo canceller circuit includes a digital filter having adaptive tap coefficients to simulate an echo response occurring during a call. The adaptive tap coefficients are updated during the call using a Means Squares process. A tap energy de |
| 7400792 |
Methods and apparatus to make substantially uniform losses in optical cross connects |
July 15, 2008 |
| A method for cross connecting optical signals includes using a common beam steerer to direct a set of optical signals from a set of input ports to a set of output ports. The method further includes adjusting a curvature of the common beam steerer so that paths of the optical signals have |
| 7397827 |
Systems and methods for switching multi-rate communications |
July 8, 2008 |
| A method for switching multi-rate communications is described. The method includes filling a first set of p timeslots with p sets of data from a first data collection of a first type, where the first data collection includes m sets of data and p is less than m. The method also includes |
| 7391972 |
Method and apparatus for maintaining behavior of a network terminal |
June 24, 2008 |
| A method of controlling behavior of an element in a passive optical network (PON) is provided. The method includes (i) issuing a message from a first PON element to a second PON element to cause the second PON element to enter or maintain a state of upstream communications, the state |
| 7376350 |
Methods and apparatus for optical network management using pilot tones |
May 20, 2008 |
| Methods and apparatus for managing an optical network using pilot tones are provided. One method includes selecting an optical path having a plurality of nodes from a database defining an expected optical network. A detected list of pilot tones associated with each node of the selected |
| 7369772 |
Optical line terminal arrangement, apparatus and methods |
May 6, 2008 |
| A wavelength division multiplexed optical communication system including a first optical line interface optically coupled to a first transponder and an optical demultiplexer through which the first optical line interface is not optically coupled to the first transponder. The system also |
| 7366294 |
Communication system tonal component maintenance techniques |
April 29, 2008 |
| 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 or silence, a joint |
| 7362811 |
Audio enhancement communication techniques |
April 22, 2008 |
| A communication system (10) receives a communication signal comprising first and second data with different compression levels, such as highly compressed and weakly compressed levels. A mode detector (15) detects the level of compression. One or more signal decoders (20, 22) decode the |
| 7359855 |
LPAS speech coder using vector quantized, multi-codebook, multi-tap pitch predictor |
April 15, 2008 |
| A method and apparatus for reducing the complexity of linear prediction analysis-by synthesis (LPAS) speech coders. The speech coder includes a multi-tap pitch predictor having various parameters and utilizing an adaptive codebook subdivided into at least a first vector codebook and a |
| 7359323 |
Bi-directional ring network having minimum spare bandwidth allocation and corresponding connecti |
April 15, 2008 |
| 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 link failure for each l |
| 7352758 |
Dynamic bandwidth management using signaling protocol and virtual concatenation |
April 1, 2008 |
| A communication system (10) employs switching circuits, such as an add/drop multiplexer (70) and another add/drop multiplexer (110). The bandwidth of a circuit switched connection between the switching circuits is altered without taking down the connection. |
| 7350207 |
Rule-based system and method for downloading computer software over a network |
March 25, 2008 |
| The apparatus, system, and method facilitates the replacement of software components. New versions of software components and files may be transmitted to a computer system for purposes of updating the existing software components and files on that computer system. Automatic updating |
| 7346709 |
Methods for assigning rings in a network |
March 18, 2008 |
| A method for managing nodes in a network includes assigning to a cycle set a cycle having a size of n, the preferred maximum nodes per cycle, or smaller. If this cycle set does not include the all of the nodes in the network, the method includes increasing n by one and assigning to the |
| 7327747 |
System and method for communicating data using a common switch fabric |
February 5, 2008 |
| 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 system cell format. A |
| 7321313 |
Electronic insertion/extraction cycle counter and logger device |
January 22, 2008 |
| A monitoring system monitors wear of a connector by counting insertions or extractions between circuit boards. The monitoring system includes a sensor that senses insertions or extractions through contact or non-contact sensing. The monitoring system also includes a monitor connected |
| 7315510 |
Method and apparatus for detecting MPLS network failures |
January 1, 2008 |
| Recovery time upon the failure of a link or switching system in an asynchronous data network can be minimized if downstream data switches can provide upstream messages to upstream switching systems indicating to upstream switching systems that the downstream traffic arrived in tact a |
| 7308198 |
Method for allocating protection bandwidth in a telecommunications mesh network |
December 11, 2007 |
| A telecommunications mesh network includes a plurality of nodes each interconnected by an edge. A traffic demand is received having a working path with a link of edges interconnecting a source node with a destination node. The telecommunications mesh network has one or more pre-cross |
| 7302182 |
Methods and apparatus for sensing multiple wavelengths simultaneously in a single wavelength sen |
November 27, 2007 |
| A method and system provide for sensing multiple wavelengths simultaneously in a single wavelength sensing device. The system may have a plurality of laser signals and a plurality of identifiable modulation signals. A respective laser signal of the plurality of laser signals is combi |
| 7302178 |
System and method for measuring power of optical signals carried over a fiber optic link |
November 27, 2007 |
| A pilot tone generator receives optical energy from an optical communication medium carrying a plurality of optical signals. Each optical signal carries data modulated at a unique wavelength and further modulated with a unique identification signal. The identification signal has an a |
| 7301911 |
Method and system for multi-layer network routing |
November 27, 2007 |
| 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 in traversing from |
