Patents Assigned to AND Communications
  • Method and apparatus for ensuring cell ordering in large capacity switching systems and for synchronizing the arrival time of cells to a switch fabric
    Publication number: 20030227945
    Abstract: Where links between a port module and plural switch fabric slices are of various lengths, a cell is transmitted from the port module to a switch fabric slice in response to a grant. The transmission is delayed by an amount based on a link round trip delay (RTD) value for the corresponding link between the port module and the switch fabric slice, and a predetermined global delay value. As a result of this delay, the cell arrives at the switch fabric slice at a fixed number of cell times (equal to the global delay value) after issuance of the grant, independent of any link lengths.
    Type: Application
    Filed: December 18, 2002
    Publication date: December 11, 2003
    Applicant: Velio Communications, Inc.
    Inventors: Martin Braff, Gopalakrishnan Ramamurthy, William J. Dally
  • Applying session services based on packet flows
    Publication number: 20030227880
    Abstract: Session services are employed in a networked computing environment to apply specific processing to an exchange of data between processes. In a wireless communication network, a single wireless link is typically shared among multiple users through wireless channels, which are allocated and switched among the users on a demand basis. Packets sent over the wireless link need to be signaled and tagged accordingly to initiate and employ the session service for the intended packets which comprise the flow. A method for identifying and applying session services to a wireless link includes identifying a packet flow over the wireless link corresponding to a received message by employing a flow identifier and filter. The packet flow corresponds to a session, and is mapped to at least one session service. The mapped session service is then applied to the received message.
    Type: Application
    Filed: June 10, 2002
    Publication date: December 11, 2003
    Applicant: Tantivy Communications, Inc.
    Inventors: Howard A. Heller, James A. Proctor
  • Fair multiplexing of transport signals across a packet-oriented network
    Publication number: 20030227906
    Abstract: A fair multiplexing of synchronous transport signals facilitates emulation of synchronous transport signals, such as SONET signals, across a packet-oriented network. A system and a process include receiving a data representative of a synchronous transport signal at several channel processors, storing the data in a memory element, creating a number of packets conforming to the protocol of a packet-oriented network using the stored data. The system and the process also include storing the packets in a different set of memory elements associated with each of the packet processors, selecting one of the memory elements based on the amount of information stored by each of the memory elements, and transmitting the packets associated with the selected memory element via the packet-oriented network.
    Type: Application
    Filed: July 26, 2002
    Publication date: December 11, 2003
    Applicant: LITCHFIELD COMMUNICATIONS, INC.
    Inventor: Edward H. Hallman
  • Adaptive timing recovery of synchronous transport signals
    Publication number: 20030227913
    Abstract: One aspect of the present invention provides a process and a system for emulating a synchronous transport signal across a packet-oriented network. The process includes the steps of receiving a data representative of a synchronous transport signal at each of several channel processors, creating a number of packets, each having a header conforming to the protocol of a packet-oriented network, and transmitting the packets via the packet-oriented network. In addition, the process also includes the steps of storing each of these packets in a set of memory elements associated with each of the channel processors and adjusting timing of the synchronous transport signal based on the packet-count telemetry associated with each of the memory elements.
    Type: Application
    Filed: June 5, 2002
    Publication date: December 11, 2003
    Applicant: LITCHFIELD COMMUNICATIONS, INC.
    Inventors: Edward H. Hallman, Leigh David Danenberg, Donald Richard Brown, Thomas K. Johnson
  • Method and system for guaranteeing quality of service in large capacity input output buffered cell switch based on minimum bandwidth guarantees and weighted fair share of unused bandwidth
    Publication number: 20030227926
    Abstract: Data cells of plural classes are transferred from input ports to output ports through a switch by storing the cells at each input port in class-specific virtual output queues (VOQ) within sets of VOQs associated with output ports, and providing credits to VOQs according to class-associated guaranteed bandwidths. When a cell is received at a VOQ having credits, a high-priority request for transfer is generated. If a cell is received at a VOQ that does not have any available credits, a low-priority request for transfer is generated. In response to requests, grants are issued to VOQ sets without regard to class, high-priority requests being favored over low-priority requests. When a grant is received for a particular VOQ set, an arbitrator selects a VOQ from the set, giving priority to VOQs having credits over VOQs without credits, and a cell from the selected VOQ is transferred.
    Type: Application
    Filed: December 18, 2002
    Publication date: December 11, 2003
    Applicant: Velio Communications, Inc.
    Inventors: Gopalakrishnan Ramamurthy, Gopalakrishnan Meempat, William J. Dally
  • Congestion management
    Patent number: 6661802
    Abstract: Congestion management is provided using one or more receive queues organized into a queue list. Each queue is associated with a high water mark and a low water mark. The high water mark indicates a length at which the queue is considered congested. The low water mark is a length at which a congested queue is considered no longer congested. When a queue reaches or exceeds its high water mark, newly arriving frames destined for that queue which are eligible for discard are dropped. Frames arriving not marked as eligible for discard are enqueued at the queue's tail. Queues in the queue list are organized by relative priority. When a single queue above a predetermined priority is determined to be congested, all queues in the queue list are treated as congested. Congestion in lower priority queues results in only the individual congested queue being treated as congested.
    Type: Grant
    Filed: October 26, 1999
    Date of Patent: December 9, 2003
    Assignee: Fujitsu Network Communications, Inc.
    Inventors: Michael J. Homberg, Steve N. Barbas
  • System and method for recording telephonic communications
    Patent number: 6661879
    Abstract: A system and method are disclosed for recording a wireless telephone call upon demand comprising the steps of initiating a telephone call from a telephone device with at least one receiving party, and establishing a third-party connection with a central archive to facilitate recordation of the content of the telephone call by the central archive by performing at least one of the steps of depressing a dedicated function key on the telephone device, selecting an appropriate option from a menu displayed on the telephone device, entering a code on the telephone device represented by a sequence of keystrokes, and uttering a recognized voice command.
    Type: Grant
    Filed: November 10, 2000
    Date of Patent: December 9, 2003
    Assignee: Xtend Communications Corp.
    Inventors: William I. Schwartz, Robert M. Charland
  • Synchronisation method and device for a communication receiver
    Patent number: 6662000
    Abstract: The method determines a deviation between a modulation frequency, combined with a first baseband signal to form a transmitted signal and a frequency used by the receiver to form a second baseband signal from a received signal, in order to adjust the frequency used by the receiver. Knowing a time segment of the first signal and the time position of a corresponding segment of the second signal, whereby the segments comprise N samples at a sample frequency Fe, a frequency transform Y(f), of size N, of the product of the complex conjugate of said segment of the first signal by the corresponding segment of the second signal is calculated, and the frequency deviation &Dgr;f which makes the frequency transform Y(f) as close as possible to C.
    Type: Grant
    Filed: September 5, 2000
    Date of Patent: December 9, 2003
    Assignee: Matra Nortel Communications
    Inventors: Fabrice Jean-André Belveze, Florence Madeleine Chancel
  • Method for monitoring the length of constant-wire-length bonds and apparatus therefor
    Patent number: 6661525
    Abstract: On a circuit-board intended for constant-wire-length (CWL) bonding, one or more special “test” pairs of bonding pads are provided along with, in each case, a series of markings adjacent the pads. In use, the board is populated with CWL bonds (this includes the normal circuit-related RF bond-pads as well as the test bond-pads) and the test bonds are distorted so that the bond-wires in question lie aligned against the markings. The alignment position relative to the markings indicates whether the bond-wires for the whole board are of correct or incorrect length. Measurement may be either absolute, in which case the markings are associated with a scale indication, or relative, in which case one of the markings will usually be visibly distinguished from the rest in some way. Depending on the length determination, the bond-forming device (e.g.
    Type: Grant
    Filed: September 11, 2001
    Date of Patent: December 9, 2003
    Assignee: Marconi Communications GmbH
    Inventors: Klaus Junger, Willibald Konrath, Stefan Kern
  • Apparatus for processing data packet of ethernet switch system and method thereof
    Patent number: 6661792
    Abstract: A method and apparatus for processing a data packet of an Ethernet switch system in which packet information is transferred from a first device to a second device on the basis of field information of a packet inputted through an Ethernet, including the steps of: detecting a first address from a packet inputted to a predetermined input port of a MAC through the Ethernet; determining an output port of a packet to be detected from the MAC on the basis of the first address provided from the MAC on a real time basis and a MAC address stored in a search memory; and detecting whether the determined output port is ready to use or not and transferring a packet detected from the MAC to the Ethernet through the output port.
    Type: Grant
    Filed: January 31, 2000
    Date of Patent: December 9, 2003
    Assignee: LG Information & Communications, Ltd.
    Inventor: Sung Joon Park
  • Digital subscriber line alternating current EMI/RFI broadband noise eliminator
    Patent number: 6661634
    Abstract: The present invention provides an apparatus and method for filtering electrical power to and from an electrical appliance to reduce or eliminate electromagnetic interference (EMI) and radio frequency interference (RFI). In one embodiment, an electrical outlet strip apparatus is provided for interconnection between an AC power source and an electrical appliance that provides transient voltage surge suppression for the appliance while substantially reducing or eliminating EMI from the AC power source from reaching the appliance. Additionally, the apparatus reduces or eliminates EMI produced by the appliance from propagating into the AC power system. The apparatus and method utilize a multistage EMI filter to filter the electrical power. In particular, the electrical power is filtered in a broadband range associated with digital subscriber line (DSL) systems to provide for improved DSL system performance.
    Type: Grant
    Filed: January 8, 2002
    Date of Patent: December 9, 2003
    Assignee: Qwest Communications International, Inc.
    Inventors: John A. Roberts, Jr., Bruce A. Phillips, Carlton Francis Scott Schneider
  • Wave guide adapter
    Patent number: 6661305
    Abstract: A waveguide adapter is arranged between a rectangular waveguide with a single cross-section and an elliptical waveguide which allows for the propagation of a fundamental wave type and higher wave types. The adapter includes a longitudinal channel which allows for the propagation of higher types of waves at least on one part of the length thereof and consists of various stages with different cross-sections. The adapter also has waveguide gates which are used to couple higher waves of the elliptical waveguide. The stages of the waveguide adapter in which the higher wave types are propagated have an elliptical cross-section.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: December 9, 2003
    Assignee: Marconi Communications GmbH
    Inventors: Uwe Rosenberg, Martin Schneider
  • OUTPUT APPARATUS, TRANSMITTER, RECEIVER, COMMUNICATIONS SYSTEM FOR OUTPUTTING, TRANSMITTING AND RECEIVING A PSEUDORANDOM NOISE SEQUENCE, AND METHODS FOR OUTPUTTING, TRANSMITTING RECEIVING PSEUDORANDOM NOISE SEQUENCES AND DATA RECORDING MEDIUM
    Patent number: 6661831
    Abstract: A PN sequence output apparatus outputs a PN sequence which is generated by using a Chebyshev polynomial T(a, cos &thgr;)=cos(a &thgr;) for an integer a (2≦a) and which has a length N (1≦N). An accepting section accepts an S (1≦S) number of initial values X1, X2, . . . , Xs each of which is a real number larger than −1 and less than 1, and an S number of degrees p1, p2, . . . , ps each of which is an integral number equal to or larger than 2. A calculation section calculates a Pseudorandom Noise sequence, having a length N, z[1], z[2], . . . , z[N], using the initial values, the degrees, and recurrence formulas xj[1]=Xj, xj[m+1]=T (pj, xj[m]), and z[n]=Πj=1s T(pj, xj[n]), for integers j (1≦j≦S), m (1≦m≦N−1) and n (1≦n≦N). An output section outputs a PN sequence.
    Type: Grant
    Filed: August 18, 2000
    Date of Patent: December 9, 2003
    Assignees: Communications Research Laboratory, Ministry of Posts and Telecommunications
    Inventor: Ken Umeno
  • Process for making a plastic counterflow heat exchanger
    Patent number: 6660198
    Abstract: A process for making inner and outer ducts for a simple but effective plastic heat exchanger by a simple blow molding or thermoforming technique. Seals are formed by providing initially closed inner ducts which are stacked on one another and the end portions of the inner ducts are placed in a mold. A castable adhesive sealant is placed in the mold and around the stacked inner ducts. After curing, the mold and the stacked inner ducts are separated and a portion of the stack and a portion of the seal material are cut and removed. Thereafter, the outer duct is positioned about the stacked inner ducts so that two different flow paths are formed. Instead of molding the seal, a preformed seal may be press fitted to the stack of inner ducts.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: December 9, 2003
    Assignee: Marconi Communications, Inc.
    Inventor: Richard L. Fischer
  • Electronic device and process for producing the same
    Patent number: 6660409
    Abstract: Electrically functional electronic device including an organic electroluminescence device is protected with a dense protective film, e.g. a silicon oxynitride film, formed on at least one part of the outer surface of the device at a low temperature by ECR plasma sputtering can prevent permeation of moisture, oxygen etc. into the device from the outside.
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: December 9, 2003
    Assignees: Panasonic Communications Co., Ltd
    Inventors: Takahiro Komatsu, Akira Gyoutoku, Shintaro Hara, Takafumi Hamano, Hiroshi Nakashima, Dawei Gao, Katsunori Muraoka, Katsuhiko Furukawa
  • High-speed optical sub-assembly utilizing ceramic substrate, direct coupling and laser welding
    Patent number: 6659659
    Abstract: An optical subassembly (OSA) includes a ferrule, an optical fiber, a ceramic substrate, and a seal coupled to the ceramic substrate. A weld sleeve is used to fixably couple the ferrule to the seal ring, for which the weld sleeve may be laser welded to the ferrule and/or the seal ring. The OSA may be a transmitter OSA or a receiver OSA, and may be hermetically sealed.
    Type: Grant
    Filed: February 5, 2002
    Date of Patent: December 9, 2003
    Assignee: Optical Communication Products, Inc.
    Inventor: Kevin J. Malone
  • Software-testing automation system
    Patent number: 6662312
    Abstract: A software-testing automation system for tests a plurality of deployed images that are spread across multiple software platforms. Each deployed image includes a test component configured to accept a connection on a known testing port, and the test component for a deployed image is inserted in a development environment and is then integrated into the image upon deployment. The system includes a test engine configured to run a plurality of tests on the plurality of deployed images. The test engine runs a test on an image under test by requesting a connection to the corresponding test component on the known testing port and sending commands over the connection. A user interface connected to the test engine allows a user to control the test engine and to view test results. An alternative embodiment utilizes a well-known test engine interface and a plurality of adaption layers to connect to external test tools.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: December 9, 2003
    Assignee: Qwest Communications International Inc.
    Inventors: Spencer A. Keller, Anne-Marie Scheidegger
  • Fiber-optic modules with housing/shielding
    Patent number: 6659655
    Abstract: A fiber-optic module having a housing/shielding unit and a module chassis frame having optical, electrical and electro-optical components. The housing/shielding unit functions both as a protective outer housing and an electromagnetic shield. The housing/shielding unit includes forward fingers for a flush mounting in one embodiment and backward fingers for an extended mounting in another embodiment. The fingers can contact a bezel, face-plate or wall of host system to ground the housing/shielding unit to a chassis ground. The module chassis frame may be formed of a conductive material and grounded as well through a host system faceplate or otherwise to the chassis ground. A transmit ground for transmitter components and a receive ground for receiver components are isolated from the chassis ground.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: December 9, 2003
    Assignee: E20 Communications, Inc.
    Inventors: Edwin Dair, Wenbin Jiang, Cheng Ping Wei, Yong Peng Sim
  • Method and apparatus for reconstructing media
    Patent number: 6661793
    Abstract: A method and apparatus for reconstructing media at a receiver from a media stream which includes a plurality of data packets wherein each data packet includes at least one media field. The media stream is monitored by a monitoring device and a packet pattern of the media stream is evaluated. An estimating device estimates a media time of at least one lost packet for reconstructing media by a reconstructing device at the receiver.
    Type: Grant
    Filed: January 19, 1999
    Date of Patent: December 9, 2003
    Assignee: Vocaltec Communications Ltd.
    Inventor: Vladimir Pogrebinsky
  • Secure internet documents
    Publication number: 20030226024
    Abstract: Unauthorized alteration of documents is reduced by encrypting secured documents held by an Internet server. A crypt engine encrypts each document when stored in a secured storage and decrypts the document when retrieved from the secure storage for delivery by the server to each requesting client.
    Type: Application
    Filed: June 4, 2002
    Publication date: December 4, 2003
    Applicant: Qwest Communications International Inc.
    Inventor: Anthony Sweets