Patents Examined by Man Phan
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Patent number: 6826169Abstract: A code multiplexing transmitting apparatus spread-spectrum modulates transmission data of a plurality of channels by spreading codes that differ from one another, combines the spread-spectrum signals of each of the channels and transmits the resultant spread-spectrum modulated signal. A spread-spectrum modulating unit for each channel includes a phase shifter for shifting, by a predetermined angle channel by channel, the phase of a position vector of the spread-spectrum modulated signal of each channel. As the result of such phase control, the phases of pilot signal portions of the spread-spectrum modulated signals of the respective channels are shifted relative to one another so that the peak values of the code-multiplexed signal can be suppressed.Type: GrantFiled: July 13, 2000Date of Patent: November 30, 2004Assignee: Fujitsu LimitedInventors: Kazuo Nagatani, Yasuyuki Oishi, Hidenobu Fukumasa, Hajime Hamada, Yoshihiko Asano
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Patent number: 6826150Abstract: A method for policing traffic on a computer communications network having a multitude of nodes interconnected by various communications media. An individual policer is established at each node for monitoring and/or policing the traffic incoming to that node. Traffic policy parameters are established for traffic-classes and the policy is implemented at each individual policer. Thresholds may be established and when the thresholds are met or exceeded the individual policer will export the traffic conditions at the respective node. The other individual policers or a master policer will receive the exported information. -The individual policers police the traffic incoming to its associated node depending on the traffic condition information received from all the nodes. Several classes may be handled by each individual policer. Leaky bucket algorithms may be used in some instances.Type: GrantFiled: October 2, 2001Date of Patent: November 30, 2004Inventors: Dipankar Bhattacharya, Yiren Huang, Raymond Kloth, Ketan A. Padwekar
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Patent number: 6822972Abstract: A broadband communication system includes headend equipment for transmitting downstream signals and for processing upstream signals and communication devices coupled to one another in a bi-directional ring, where one of the communication devices functions as a hub that is coupled to the headend equipment for providing the upstream signals to, and receiving the downstream signals from, the headend equipment. A clockwise communication path couples the communication devices to one another for the reception and transmission of clockwise-traveling signals that include the downstream signals and at least a portion of the upstream signals, and a counterclockwise communication path couples the communication devices to one another for the reception and transmission of counterclockwise-traveling signals that include the downstream signals and at least a portion of the upstream signals.Type: GrantFiled: September 12, 2000Date of Patent: November 23, 2004Assignee: Scientific-Atlanta, Inc.Inventor: Forrest M. Farhan
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Patent number: 6816464Abstract: A method, system and computer program product for route checking and management is described herein. In a voice over internet protocol environment, the invention allows for the testing of routes among various gateways. In one embodiment, gateways include routing managers for checking and storing route information. The method of the invention includes checking candidate routes for the level of quality, location and cost levels. Further, users can prioritize routes based on these criteria.Type: GrantFiled: September 13, 2000Date of Patent: November 9, 2004Assignee: Array Telecom CorporationInventors: Mark D. Scott, Anita T. Cheng
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Patent number: 6813258Abstract: A detection method in which a CDMA-coded data signal is transmitted in the form of a data stream of spread data bursts between a transmitter and a receiver, hierarchical CDMA codes being used for the transmission. In a first step, codes having a smaller spreading factor than a maximally to be detected spreading factor are detected. In a second step, codes having a larger spreading factor than in the previous step are detected, the detection results of the first step being taken into account. In a third step, the detection process is broken off if all codes are detected, or otherwise the second step is repeated with the detection results last obtained in each instance, until all codes are detected.Type: GrantFiled: January 4, 2002Date of Patent: November 2, 2004Assignee: Robert Bosch GmbHInventors: Martin Hans, Frank Kowalewski, Josef Laumen, Gunnar Schmidt, Siegfried Baer, Mark Beckmann
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Patent number: 6813242Abstract: A new technique for fast alternate-path automatic rerouting of labeled data packets normally routed over a predetermined primary label switched path upon failure or congestion in the primary path.Type: GrantFiled: May 7, 1999Date of Patent: November 2, 2004Assignee: Lucent Technologies Inc.Inventors: Dimitry Haskin, Krishnan Ramakrishnan
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Patent number: 6813267Abstract: One embodiment of the present invention provides a system that facilitates packet communication between a device within a computing system and one or more additional devices of the computing system. The system receives either a point-to-point packet or a broadcast packet from the devices and inspects the header of the packet to determine the type of packet. The system also examines the state of the computing system to determine whether the state of the computer system is broadcast preferred or point-to-point only. If the type of the packet is broadcast and the state of the computing system is broadcast preferred, the system sends the packet to all of the additional devices. If the type of the packet is broadcast and the state of the computing system is point-to-point only, the system delays sending the packet until the state of the computing system changes to broadcast preferred.Type: GrantFiled: September 11, 2000Date of Patent: November 2, 2004Assignee: Sun Microsystems, Inc.Inventors: William A. Clayton, Lee A. Warner, Wayne F. Seltzer
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Patent number: 6804267Abstract: Transceiver training is optimized for xDSL modems operating in TCM-ISDN environments under NEXT and FEXT interference. Current ITU-T draft recommendations provide for dual bitmaps that are switched synchronized with the burst cycle of TCM-ISDN to provide a data stream having dual bit rates. These recommendations also provide for a single bitmap mode where the NEXT bit map is off. Prior to transceiver training, a modem does not know which mode has been selected. Transceiver training is optimized if the mode selection is known prior to transceiver training and the training signals are designed properly for the selected mode. To accomplish this, the mode selection is exchanged early in the modem initialization process, for example, during initial handshaking. By exchanging the mode selection earlier in the modem initialization process, the modem is able to improve transceiver training and configure properly for the type of data communication (e.g., full-duplex, half-duplex).Type: GrantFiled: June 4, 1999Date of Patent: October 12, 2004Assignee: Centillium Communications, Inc.Inventors: Guozhu Long, Yaron Bar-Ness
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Patent number: 6804232Abstract: A network (100) includes a hub device (110) and at least one unattached peripheral device (120). The unattached peripheral device (120) transmits an attach request to the hub device (110) with a selected address, receives a new address from the hub device to identify the unattached peripheral device (120), and communicates with the hub device (110) using the new address.Type: GrantFiled: March 27, 2000Date of Patent: October 12, 2004Assignee: BBNT Solutions LLCInventor: Robert J. Donaghey
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Patent number: 6804268Abstract: A multi-access transmission method for effectively and efficiently utilizing bands of a synchronous digital hierarchy (SDH) path. The method has the steps of extracting a synchronous digital hierarchy path from signals input from a first point, recognizing all packets or cells input from the first point to select and drop a packet or cell to be dropped at a second point, multiplexing packets or cells not dropped and a packet or cell to be inserted at the second point at a packet or cell level, and sending signals created at the multiplexing step to a third point. With this method, packets or cells are multiplexed in a synchronous digital hierarchy path to share one synchronous digital hierarchy path among a plurality of communications.Type: GrantFiled: January 21, 2000Date of Patent: October 12, 2004Assignee: NEC CorporationInventor: Naohiro Shimada
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Patent number: 6801548Abstract: An apparatus and method for a synchronous optical network (SONET) includes ordering a plurality of signals of a first type in one or more line cards for transmit to one or more types of line cards, wherein the ordering of the first type of signals creates a plurality of independent signals of a second type, and transmitting the plurality of the first type of signals to the one or more types of line cards, wherein the independence of the signals of the second type permits the one or more types of signals of the second type to be in an arbitrary order.Type: GrantFiled: June 30, 2000Date of Patent: October 5, 2004Assignee: Cisco Technology, Inc.Inventors: Douglas E. Duschatko, Lane B. Quibodeaux, Robert A. Hall, Andrew J. Thurston
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Patent number: 6798750Abstract: In a method for administration of priorities of routes in a telecommunications network, for converting priority values of various routes from an actual condition into a target condition, a request for defining its priority value is implemented for each route defined in the target condition that has one of the priority modes “EQUAL” or “INSERT” as a parameter. The requests are executed in the sequence of decreasing priority, and the priority mode “insert” is employed for the respectively first request for fixing on a given priority value. The priority mode “EQUAL” is selected for every further request for fixing on the same priority value.Type: GrantFiled: June 30, 2000Date of Patent: September 28, 2004Assignee: Siemens AktiengesellschaftInventor: Bernhard Langgartner
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Patent number: 6795409Abstract: A method, communication device, and machine-readable medium. The method includes sending a first poll from a first base station having a smart antenna system to a first user terminal. The first base station receives a first uplink response signal from the first user terminal as a result of the first user terminal successfully receiving the first poll. The first base station also receives at least one other uplink response signals as a result of at least one other remote user terminal successfully receiving a second poll from a second base station. The first base station transmits downlink data to the first user terminal using a downlink smart antenna processing strategy for transmitting to the first user terminal, including mitigating interference to the first and one or more other remote communication devices from which the first base station received a first or other uplink response signal and that may be receiving during transmission of downlink data to the first user terminal.Type: GrantFiled: September 29, 2000Date of Patent: September 21, 2004Assignee: ArrayComm, Inc.Inventors: Michael Youssefmir, Mitchell D. Trott, Roger Rogard
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Patent number: 6791965Abstract: A code multiplexing transmitting apparatus spread-spectrum modulates transmission data of a plurality of channels by spreading codes that differ from one another, combines the spread-spectrum signals of each of the channels and transmits the resultant spread-spectrum modulated signal. A spread-spectrum modulating unit for each channel includes a phase shifter for shifting, by a predetermined angle channel by channel, the phase of a position vector of the spread-spectrum modulated signal of each channel. As the result of such phase control, the phases of pilot signal portions of the spread-spectrum modulated signals of the respective channels are shifted relative to one another so that the peak values of the code-multiplexed signal can be suppressed.Type: GrantFiled: October 17, 2002Date of Patent: September 14, 2004Assignee: Fujitsu LimitedInventors: Kazuo Nagatani, Yasuyuki Oishi, Hidenobu Fukumasa, Hajime Hamada, Yoshihiko Asano
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Patent number: 6788692Abstract: The present invention is a method and apparatus to balance load in a cluster of switches in a network. The switches include a local switch and one or more remote switches. Messages containing load information of the switches are exchanged among the switches. One of the switches is selected to respond to a connection request to the local switch based on a metric.Type: GrantFiled: June 1, 1999Date of Patent: September 7, 2004Assignee: Nortel Networks LimitedInventors: Daniel Boudreau, J. Martin Borden, James A. Philippou, Shawn Mamros, Kerry M. Hannigan, John T. O'Hara, Bernard Farrell
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Patent number: 6785239Abstract: A method and apparatus are described to reduce delay in a communication network. A fragmentation unit re-assembles a packet received from a first data link. A refragmentation pipeline is coupled to the fragmentation unit to pipeline the re-assembled data for transmission to a second data link.Type: GrantFiled: June 1, 1999Date of Patent: August 31, 2004Assignee: Cisco Technology, Inc.Inventor: Michael Tasker
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Patent number: 6781968Abstract: A system, apparatus and method provide wireless communications to a geographical area. The system includes at least one atmospheric platform serving as a central relay or node using a star network topology for the geographic area. The atmospheric platform carries a payload that comprises communications equipment. The system further includes a plurality of user equipment units located within the geographic area and at least one ground station or gateway for providing an information pathway between the user equipment units. The gateway has network processing and switching equipment for routing the information between the users. A wireless trunkline carries signals between the gateway and the atmospheric platform. The apparatus and method comprise gateway and payload uplink portions and downlink portions. The downlink portions aggregates and de-aggregates user generated information from the platform to the gateway.Type: GrantFiled: January 28, 2000Date of Patent: August 24, 2004Inventors: Nicholas J. Colella, George G. Chadwick
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Patent number: 6768734Abstract: A device and a method for equalizing data delays in a multiplicity of serial input data streams switched by a switching network in a telecommunication switching system, wherein the multiplicity of data word synchronization units are used for synchronizing a multiplicity of input data streams at a data word level into a multiplicity of synchronized parallel input data streams.Type: GrantFiled: June 17, 2002Date of Patent: July 27, 2004Assignee: Siemens AktiengesellschaftInventor: Christian Wenk
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Patent number: 6765876Abstract: A device outputting a plurality of paths to a terminal after rearranging the plurality of paths when the paths are arranged in an order of free choice, the device having a counter which receives a path number of a path in response to first data about the path, and increments a count, starting from the path number, in response to additional data arriving and a storage unit, on a side of a communication line, shared by the plurality of paths, which stores real data of the path at positions indicated by the count, wherein the real data stored in the storage unit is output to the terminal.Type: GrantFiled: December 19, 2001Date of Patent: July 20, 2004Assignee: Fujitsu LimitedInventor: Tadashi Saitoh
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Patent number: 6765927Abstract: RSVP host proxy services for extending RSVP-signaled QoS provisioning to flows involving one or more RSVP-unaware hosts. In an RSVP sender host proxy service, a switch through which an RSVP-unaware source host accesses a network acts as an RSVP sender host proxy for the source host. In an RSVP receiver host proxy service, a switch through which an RSVP-unaware destination host accesses a network acts as an RSVP receiver host proxy for the destination host.Type: GrantFiled: April 12, 2000Date of Patent: July 20, 2004Assignee: AlcatelInventors: Christopher Martin, D. Brian Edginton