Patents Examined by Roberta Stevens
  • Patent number: 7050438
    Abstract: A multiplexing equipment included in an ATM network to transmit control line signals for interfacing data communication terminals. The transmission of the control line signals is realized by reserving a field in a payload in a cell format for the control line signal transmission between the data communication terminals, mapping RS/CD, CS, ER/DR, CI of the control line signals at intervals based on a terminal speed, multiplexing the mapped control line signals at the transmission side, and separating the multiplexed control line signals at reception side.
    Type: Grant
    Filed: March 8, 2000
    Date of Patent: May 23, 2006
    Assignee: Hitachi Telecom Technologies, Ltd.
    Inventors: Eisuke Atsuumi, Kimitoshi Takeuchi, Hiroaki Hashimoto, Tatsuya Suzuki
  • Patent number: 7039047
    Abstract: A method and apparatus for implementing virtual wire signaling is described. It includes an apparatus including a first component, a bus coupled to the first component, the bus to transmit packets of data, and a second component coupled to the bus, messages passed between the first component and the second component through packets transmitted on the bus.
    Type: Grant
    Filed: November 3, 1999
    Date of Patent: May 2, 2006
    Assignee: Intel Corporation
    Inventors: Jasmin Ajanovic, David Harriman
  • Patent number: 6959008
    Abstract: A method and apparatus for alignment of TDM-based signals for packet transmission using framed and unframed operations are described. In an embodiment, a line card in a network element includes a deframer unit that receives a Time Division Multiplexing (TDM) signal. The TDM signal includes a payload and overhead data. The deframer generates frame alignment data based on the overhead data. The line card also includes a packet engine unit coupled to the deframer unit. The packet engine unit receives the payload, the overhead data and the frame alignment data and generates a number of packet engine packets. The packet engine packets represent a frame within the TDM signal such that the packet engine packets include the payload, the overhead data and the frame alignment data. Additionally, the line card includes packet processor coupled to the deframer unit. The packet processor receives the packet engine packets and generates network packets based on the packet engine packets.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: October 25, 2005
    Assignee: Redback Networks Inc.
    Inventors: Michael McClary, Sharath Narahari, David R. Stiles
  • Patent number: 6952417
    Abstract: A system and method selectively establishes data communications, such as XDSL services, between data devices and a network switch. Status of the data devices are monitored and active data devices are connected to a data branch for data communications. Data devices which are inactive may remain connected to the data branch, if available, or may be switched to a pilot branch. While disconnected from the pilot branch, the system may detect a signal from the data device indicating that the device is going active. If pilot signals are being used, the pilot signals between a data device and the network switch are monitored to determine when the data device is going active. Once detected, the data device is connected to the data branch. Alternately, if pilot signals are not being used, the system monitors the connection with the data device for any signals, such as a wake-up signal, which indicates that the data device is going active.
    Type: Grant
    Filed: March 13, 2000
    Date of Patent: October 4, 2005
    Assignee: Lucent Technologies Inc.
    Inventor: Carl Robert Posthuma
  • Patent number: 6928060
    Abstract: A communication device which comprises transfer rate estimation means for estimating transfer rate of media data other than digital audio data before transmission, data amount controlling means for controlling data amount of the digital audio data to be transmitted in accordance with the transfer rate estimated by said transfer rate estimation means, and transmission means for transmitting the audio data whose data amount is controlled by said data amount controlling means and the media data other than the audio data.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: August 9, 2005
    Assignee: Yamaha Corporation
    Inventor: Takeshi Kikuchi
  • Patent number: 6922391
    Abstract: A method for decreasing routing latency of a switching platform comprises identifying ports which have changed their operational state and modifying the port polling code associated with the respective ports so that operational ports are polled for frames to be routed, while non-operational ports are not polled. In one embodiment, the method is implemented in a fibre channel switch. Non-operational ports are identified as having operational states below a pre-determined threshold level of functionality. The polling code for the ports is modified while polling operations are carried out in the switch. The code for a newly operational port is modified by copying into the code one or more instructions that poll the port for a frame and routes the frame. The code for a newly non-operational port is modified by copying into the code a branch instruction that bypasses the remainder of the polling code for the port.
    Type: Grant
    Filed: November 7, 2000
    Date of Patent: July 26, 2005
    Assignee: Crossroads Systems Inc.
    Inventors: Steve King, Chiayin Mao, Thomas W. Bucht
  • Patent number: 6920122
    Abstract: A control method of assigning a channel so as to cope flexibly with voice and high speed data communication services having different transmission rates in code-division multiple connection communications. A load required for a channel processing is compared with an allowable load, and a channel is assigned within the allowable load. When assignment of a busy channel is changed so as to be processed in another hardware, the synchronization of the processing is established first at the destination, then the channel is switched. It is thus possible to distribute hardware resources and software processings efficiently to users.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: July 19, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Seishi Hanaoka, Yusuke Uchida, Nobukazu Doi
  • Patent number: 6920120
    Abstract: A system and method of scheduling radio resources in a packet-switched wireless communications network. A plurality of data packets from a plurality of users are placed in a First-In-First-Out (FIFO) queue and are sequentially selected and analyzed for transmission. If a selected packet has an instantaneous radio channel quality (C/I) greater than a historical channel quality value, the packet is transmitted. If the instantaneous C/I is not greater than the historical value, it is determined whether the selected packet has been held for longer than a threshold time period. If so, the selected packet is transmitted. If neither condition is met, the selected packet is temporarily held in its position in the queue while analyzing the next packet for transmission. If no packets qualify for transmission, the packet in the first position is transmitted. After each transmission, the analysis starts again at the head of the queue.
    Type: Grant
    Filed: August 22, 2002
    Date of Patent: July 19, 2005
    Assignee: Ericsson Inc.
    Inventors: Dongjie Huang, Jianxu Shi
  • Patent number: 6891847
    Abstract: Transmissions within a communication channel utilized by devices of a computer network that are outside of a device's designated time slot are accommodated through the use of a clear channel assessment time. The clear channel assessment time takes into account the device's designated transmission time slot within the communication channel with respect to those of other network devices. Thus, the clear channel assessment time may be a time period that is the product of a predetermined clear channel waiting time and a numerical representation of the difference between the device's designated transmission time slot within the communication channel and that of another network device that completed a preceding transmission.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: May 10, 2005
    Assignee: Share Wave, Inc.
    Inventor: Rajugopal R. Gubbi
  • Patent number: 6879602
    Abstract: An offset value corresponding to the difference between counter values of cycle time counters in two buses is obtained and stored, so that the buses are connected, the value of a first cycle time counter is compensated for buy an offset value. The counter value of the first cycle time counter is compared with the counter value of a second cycle time counter, and a time stamp of data is changed corresponding to the offset value.
    Type: Grant
    Filed: March 5, 1999
    Date of Patent: April 12, 2005
    Assignee: Sony Corporation
    Inventors: Takehiro Sugita, Yasunori Maeshima
  • Patent number: 6868093
    Abstract: The present invention refers to methods and apparatuses for providing synchronization in a time division multiplexed network, wherein data is transferred on multi-access bitstreams in circuit-switched channels that are defined by respective time slots of regularly recurrent frames of said bitstreams, said frames being defined by regularly recurrent frame synchronization signals transferred on said bitstreams. According to the invention an auxiliary regularly recurrent frame synchronization signal is generated and selected as a basis for defining said frames on a bitstream if the frame synchronization signal that is used as a basis for synchronizing said frames during normal operation is not detected in accordance with an expected frame rate.
    Type: Grant
    Filed: May 12, 1999
    Date of Patent: March 15, 2005
    Assignee: Net Insight AB
    Inventors: Christer Bohm, Magnus Danielson, Per Lindgren
  • Patent number: 6865151
    Abstract: An embodiment includes an admission control program of a router in a transmission system. A router includes a dither signal (a periodic timing signal) at a frequency causing the IP flow to organize into a periodic and deterministic pattern. The frequency is selected to maximize IP flow rate. Multiple, independent input paths may be combined into a single output path using the dither signal to regulate when the paths are alternately combined into the single output path.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: March 8, 2005
    Assignee: Nortel Networks Limited
    Inventor: Ross Alexander Saunders
  • Patent number: 6865168
    Abstract: A communication system includes a first communication station for transmitting first data and second data at a first transmission power level and a second transmission power level, respectively, and a second communication station for receiving the first data and the second data transmitted from the first communication station as a reception signal. The second communication station generates transmission power control information based on the received first and second data, and transmits the generated transmission power control information to the first communication station. The first communication station receives the transmission power control information from the second communication station, and controls the first transmission power level and the second transmission power level independently of each other based on the transmission power control information.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: March 8, 2005
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Kiyoki Sekine
  • Patent number: 6865170
    Abstract: A wide area communication network includes at least two hub sites which are interconnected by a communication backbone Each hub site provides wireless coverage in at least one sector. At least two remote sites reside in each sectors and are coupled to a corresponding hub site via a point to multi point broadband wireless system. The network preferably includes at least one service node which is accessible to the remote sites via the hub sites and backbone.
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: March 8, 2005
    Assignee: IDT Corporation
    Inventor: Allan M. Zendle
  • Patent number: 6853640
    Abstract: A data selection apparatus which performs selection processes in parallel is provided. The data selection apparatus includes search units and a unit output control device. Each of the search units includes table search circuits and a data output control circuit which selects the highest priority output data. The unit output control device selects the highest priority output data from outputs of the search units. A table search circuit which succeeds in a search sends a search success signal to the data output control circuit. The search unit including the data output control circuit sends a unit search success signal to the unit output control device before performing a selection process for the highest priority data.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: February 8, 2005
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Tsunemasa Hayashi, Toshiaki Miyazaki
  • Patent number: 6839335
    Abstract: Diversity control section 111 calculates received amplitude levels of all subcarrier signals from all branches, and selects a branch providing the largest amplitude level for each subcarrier signal. Based on the above selection result, selectors 104 are switched to transmit respective subcarrier signals from the selected branch, and selectors 112 are switched to receive respective subcarrier signals from the selected branch.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: January 4, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Hiroaki Sudo
  • Patent number: 6839322
    Abstract: A method and system of routing variable-length packet data across a wave division multiplex (WDM) communications network having a plurality of data communications channels comprises inverse-multiplexing each data packet into a respective frame. Each frame includes a label block containing label information of the frame, and two or more respective payload blocks having a predetermined length. The label block contains encoded routing information, a start time, and, possibly an end time, and is transmitted over a label channel of the communications network. The start time preferably indicates a delay between launching a first bit of the label clock and the first bit of the payload blocks. The end time may be a bit count indicative of the location of the last bit of the data packet within the frame. The data packet is divided into a plurality of data segments, each of which is transported across the network within a respective payload block.
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: January 4, 2005
    Assignee: Nortel Networks Limited
    Inventor: Peter J. Ashwood Smith
  • Patent number: 6822961
    Abstract: A method and apparatus for reduction of call setup rate in an ATM network are described. The method and apparatus are particularly useful in ATM networks used for the transfer of bearer traffic between telephone switching offices. The method involves caching a number of switched virtual circuits (SVCs) between edge interfaces to the ATM network. A cache connection is an emulated circuit between two edge interfaces that is available and idle. The apparatus provides a central policy manager which computes and distributes cache policies to cache managers located in the edge interfaces. The cache managers manage pools of cached SVCs established between two edge interfaces. The method and apparatus reduces the number of connection setup requests sent to the ATM switches. The advantage is the ability to use ATM switches which have slow connection setup rates to provide commercially acceptable telephone services in an efficient manner.
    Type: Grant
    Filed: October 2, 1998
    Date of Patent: November 23, 2004
    Assignee: Nortel Networks Limited
    Inventors: Cristian M. Constantinof, Brian J. N. Vaughan, Vladimir Mikhailov, Mingxing Li
  • Patent number: 6822976
    Abstract: A method and apparatus for high throughput multiplexing of data is described. It includes a circuit including: A first multiplexer having an output, a first input, a second input, and a selector. A second multiplexer having an output, a first input, a second input, and a selector, the output of the second multiplexer coupled to the first input of the first multiplexer. A third multiplexer having an output, a first input, a second input, and a selector, the output of the third multiplexer coupled to the second input of the first multiplexer; and the selector of the first multiplexer to select an input with a stable signal.
    Type: Grant
    Filed: November 3, 1999
    Date of Patent: November 23, 2004
    Assignee: Intel Corporation
    Inventors: Robert Riesenman, Hou-Sheng Lin
  • Patent number: 6819665
    Abstract: A network implemented communication system, comprising a Local Area Network (LAN), a plurality of H.323 endpoints connected to the LAN, each of the endpoints including a communication application for communicating via H.323, at least one H.323 Gatekeeper connected to the LAN for third party control of communications between the H.323 endpoints, and software within each of the H.323 endpoints and the H.323 Gatekeeper for implementing features which do not require direct connection between the H.323 endpoints.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: November 16, 2004
    Assignee: Mitel Knowledge Corporation
    Inventors: Debbie Pinard, Harold Sit, Sonya Fullarton, Eliana Peres