Patents Examined by Douglas W. Olms
  • Patent number: 6856624
    Abstract: A communication network providing mobile IP services to mobile nodes sharing the same private IP address. A mobile node visits a foreign network from its home network and transmits a registration request including its private IP address to a foreign agent on the foreign network. If the foreign agent determines that another mobile node with a valid registration shares the same private IP address, the foreign agent requests the mobile node to use a temporary address. The temporary address is sent along with the registration request to the registering mobile node's home agent. When the home agent receives a packet addressed to its mobile node, it creates two tunnels. An outer tunnel is created using a care-of address associated with the foreign agent. An inner tunnel is created using the temporary address assigned to mobile node. The packet is then forwarded via the two tunnels.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: February 15, 2005
    Assignee: Alcatel
    Inventor: Vincent Magret
  • Patent number: 6801537
    Abstract: A method of adaptively resolving contentions in a digital communication system is provided. A headend, such as a Base station Transceiver System, transmits a Media Access Control message to Customer Premise Equipment units. The Media Access Control message includes information on the current load on shared transmission resources. The Customer Premise Equipment units implement a truncated binary exponential back-off algorithm for requests. However if the current load on the transmission resources is low enough, the Customer Premise Equipment units reduce the back-off times of backlogged requests to allow them to take advantage of the low load. The headend may also maintain a table of service flows and their levels of activity. If the level of activity at shared transmission resources falls below a threshold, the headend determines from the table which service flows are likely to have backlogged requests.
    Type: Grant
    Filed: September 7, 2000
    Date of Patent: October 5, 2004
    Assignee: Nortel Networks Limited
    Inventor: Osama M. Kubbar
  • Patent number: 6690649
    Abstract: A QoS management apparatus in which the quality of the requested QoS for each path and different values of the state are managed. A QoS monitor, a registered QoS, and an operation determining function are provided for each path, and the QoS is precisely managed.
    Type: Grant
    Filed: May 20, 1999
    Date of Patent: February 10, 2004
    Assignee: NEC Corporation
    Inventor: Naohiro Shimada
  • Patent number: 6654371
    Abstract: A method, apparatus and article of manufacture for forwarding multicast data by relaying IGMP group membership. A router is used to build a database of a plurality of interfaces and corresponding multicast groups, and the database is stored on the router. Information from the database is reported upstream to a multicast router. Multicast data is received from the multicast router and distributed to the plurality of interfaces based upon the database.
    Type: Grant
    Filed: April 15, 1999
    Date of Patent: November 25, 2003
    Assignee: Nortel Networks Limited
    Inventors: Adam Dunstan, Larry DiBurro, Yunhou Li
  • Patent number: 6639906
    Abstract: A system and method for performing the digital receive processing for multiple signals received over the same RF band is described. In a preferred embodiment of the invention, digital RF samples are stored in a queue which is accessed by a searcher and demodulator. The searcher and demodulator are preferably located on the same integrated circuit along with the queue. The demodulator demodulates a set of reverse link signals stored within the queue where each reverse link signal is received with at a particular time offset and processed using a particular channel code. The searcher periodically searches for reverse link signals not being processed by the demodulator, and for access requests transmitted via the access channel. The searcher preferably searches during the worthy power control groups of each reverse link signal, which corresponds to the two of sixteen power control groups transmitted during, an eighth rate frame.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: October 28, 2003
    Inventor: Jeffrey A. Levin
  • Patent number: 6545978
    Abstract: In a network including a plurality of exchanges, an exchange at an order request destination is specified from a maintenance terminal of an exchange at an order request source, and an order for performing maintenance and management is input. The OAM cell including the order is generated and transmitted as an ODR-OAM cell. The exchange specified with the ODR-OAM cell performs the process according to the order, and transmits the result of the process to the order request source by using an ODR-OAM cell. The order request source receives the result of the process, and maintains and manages the network. OAM cells in an ATM network are defined as OAM cells for a file update process. The first cell is an FVC-OAM cell for checking the version number of the system file of an exchange at an opposing exchange. The second cell is an FSP-OAM cell for preparing the start of the file update process. The third cell is an FIS-OAM cell for dividing a new file used for an update and carrying the file.
    Type: Grant
    Filed: December 7, 1998
    Date of Patent: April 8, 2003
    Assignee: Fujitsu Limited
    Inventor: Kenichi Sakurai
  • Patent number: 6480664
    Abstract: Tape formatting, tracking and trick mode data generation are disclosed for providing trick modes for compressed video stored on a video tape. The tape is formatted so that trick mode data is recorded at normal speed within certain areas delineated by predetermined boundaries that are within a maintainable range of a predetermined ideal scan path of the heads. These boundaries are oblique to the normal speed tracks and define trick mode data areas in which trick mode data may be recorded. To facilitate tracking, sync words and trick mode identification codes are interleaved within the trick mode data areas. During tracking, the heads reproduce the sync words and identification codes, and the identification codes that match the currently utilized trick mode are counted. The count during a current interval is compared to a count during a previous interval or a threshold to determine if the heads have locked onto the ideal scan path or deviated therefrom.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: November 12, 2002
    Inventors: Hou-Chun Ting, Hsueh-Ming Hang, Jang-Zern Tsai, Chien-Chen Liang
  • Patent number: 6426964
    Abstract: A higher data rate signal such as ATM (Asinchronous Transfer Mode) fixed size data packets and lower data rate signals such as ISDN are transmitted along the same link by accommodating the ISDN in unused time slots in the overall frame structure. The cells also contain a fiel containing incremented numbers of modulo-n and, in the reverse direction along the link, frames are transmitted which acknowledge receipt of those sequence numbers. If the next expected number is not received, the sequence transmitted is restarted at the number.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: July 30, 2002
    Assignee: Marconi Communications Limited
    Inventor: Richard J Proctor
  • Patent number: 6389025
    Abstract: A switching system for integratedly switching voice, data, image information and the like. The switching system comprises a plurality of front-end modules each adapted to perform a switching processing in association with a subscriber line or a trunk line, and a single or a plurality of central modules for interconnecting the plurality of front-end modules in star-type fashion and switching information prevailing between the front-end modules, in unit of block accommodating the information and a header added thereto to contain connection control information and in accordance with the contents of the header. The front-end modules are connected to the central module via inter-module highways each having frames occurring at a predetrmined period and time slots contained in each frame to carry blocks.
    Type: Grant
    Filed: June 5, 2001
    Date of Patent: May 14, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Yoshito Sakurai, Shinobu Gohara, Kenichi Ohtsuki, Takao Kato, Hiroshi Kuwahara, Eiichi Amada
  • Patent number: 6349100
    Abstract: A system and method provide enhanced services for a call that is transported from a communication device through an asynchronous transfer mode system. The call has user communications in asynchronous transfer mode cells and call signaling. A signaling processor receives the call signaling and processes the call signaling to determine a connection to a service platform. The signaling processor transports a processor control message designating the selected connection. An asynchronous transfer mode interworking unit receives the user communications from the communication device and the processor control message from the signaling processor. The asynchronous transfer mode interworking unit converts the user communications from the asynchronous transfer mode cells to a format compatible with the service platform and dynamically transports the user communications to the service platform in real time. The service platform processes the user communications.
    Type: Grant
    Filed: March 18, 1999
    Date of Patent: February 19, 2002
    Assignee: Sprint Communications Company, L. P.
    Inventors: Joseph Michael Christie, Tracy Lee Nelson
  • Patent number: 6304570
    Abstract: A switching system for integratedly switching voice, data, image information and the like. The switching system comprises a plurality of front-end modules each adapted to perform a switching processing in association with a subscriber line or a trunk line, and a single or a plurality of central modules for interconnecting the plurality of front-end modules in star-type fashion and switching information prevailing between the front-end modules, in unit of block accommodating the information and a header added thereto to contain connection control information and in accordance with the contents of the header. The front-end modules are connected to the central module via inter-module highways each having frames occurring at a predetrmined period and time slots contained in each frame to carry blocks.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: October 16, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Yoshito Sakurai, Shinobu Gohara, Kenichi Ohtsuki, Takao Kato, Hiroshi Kuwahara, Eiichi Amada
  • Patent number: 6275492
    Abstract: A system for routing data through a network determines whether router identification information is associated with the data. The system then identifies a next hop router from a router table if router identification information is associated with the data. Otherwise, the system identifies a next hop router from a routing table if router identification information is not associated with the data. When identifying a next hop router from the router table, the system determines whether a match exists between entries in the router table and the router identification information. The system may set a switch tag in the data packet, in which the switch tag corresponds to a destination router identification. The router table used by the system contains information regarding how to reach all known routers.
    Type: Grant
    Filed: December 2, 1997
    Date of Patent: August 14, 2001
    Assignee: Nortel Networks Limited
    Inventor: Zhaohui Zhang
  • Patent number: 6266339
    Abstract: A method of multicasting digital data to a user accessing an Internet connection is disclosed. The method includes placing digital data that is to the multicast in IP protocol to generate IP digital data. The IP digital data is transmitted from a transmission site to a remote Internet point of presence through a dedicated transmission channel substantially separate from Internet backbone. The dedicated transmission channel may be, for example, a satellite channel. At the remote Internet point of presence, the IP digital data is multicast for delivery to at least one receiving Internet user's apparatus connected to but distal from the remote Internet point of presence.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: July 24, 2001
    Assignee: Starguide Digital Networks, Inc.
    Inventors: Paul W. Donahue, Jeffrey A. Dankworth, Larry W. Hinderks, Laurence A. Fish, Ian A. Lerner, Thomas C. Ballister, Roswell R. Roberts, III
  • Patent number: 6259700
    Abstract: An electronic commerce distributed network is disclosed that includes a plurality of interconnected processing nodes. Each processing node (50) includes a first sub-node (52) and a second sub-node (54) that are connected to communicate information and are in geographically remote locations. The first sub-node (52) of each processing node (50) has an active state in which the first sub-node (52) communicates with other processing nodes and processes electronic commerce messages communicated with originator/recipient organizations. The second sub-node (54) of each processing node (50) has a mirror state in which the second sub-node (54) mirrors the first sub-node (52) as well as an active state in which the second sub-node (54) communicates with other processing nodes and processes electronic commerce messages communicated with originator/recipient organizations. The first sub-node (52) of each processing node (50) is initially in the active state, and the second sub-node (54) is initially in the mirror state.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: July 10, 2001
    Assignee: Sterling Commerce, Inc.
    Inventors: Francis Hsieh, Brad Manring
  • Patent number: 6243400
    Abstract: Apparatus for switching full rate (e.g., 64 kilobit per second) signals and composite signals comprising a plurality of subrate signals (e.g., 32 kilobit per second subrate signal). The apparatus includes a unit for compressing selected ones of a plurality of full-rate signals into a smaller plurality of full-rate single and composite signals, and apparatus for decompressing composite signals into a plurality of full-rate signals. The main elements of the switching fabric of the switch continue to switch full-rate signals. Advantageously, during periods of heavy load, the switching network fabric of a switching system can carry more calls, and more traffic can be carried between switches equipped for subrate switching.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: June 5, 2001
    Assignee: Lucent Technologies Inc.
    Inventors: Douglas Anthony Deutsch, David B. Smith
  • Patent number: 6240077
    Abstract: A dynamic, efficient, and full-duplex wireless local network is presented. The local central station equipment is implemented by implementing a Frequency Division Multiple Access (FDMA) technique on local inbound data and a Time Division Multiple Access (TDMA) technique on at least local outbound data. Conversely, each subscriber unit implements the TDMA technique on local outbound data and the FDMA technique on local inbound data. In so doing, wireless two-way communications can be established between the central station, subscriber units, and remote stations wherein the allocated carrier frequency band is fully utilized and the outbound data bandwidth can be dynamically adjusted to accommodate the bandwidth requirements of different communication applications.
    Type: Grant
    Filed: July 9, 1998
    Date of Patent: May 29, 2001
    Assignee: Golden Gate Tele Systems Inc.
    Inventors: Thomas T. Vuong, Hung Nguyen
  • Patent number: 6236655
    Abstract: A system (10) is provided for identifying a processing port (12) and a link (22) at which a cell (24) is received. The system (10) includes a logical link table (14) having a plurality of logical link entries (30). Each logical link entry (30), which corresponds to a particular link (22) of a processing port (12) associated with the logical link table (14), specifies a numerical value. The processing port (12) may receive the cell (24) at one of a plurality of links (22). The processing port (12) can convert the cell (24) by replacing a numerical value of an identification field, such as a virtual channel identification field (28), of the cell (24) with the numerical value specified by the logical link entry (30) corresponding to the link (22) at which the cell (24) is received. A switch control module (18), which is connected to the processing port (12), may receive the converted cell (38).
    Type: Grant
    Filed: July 18, 1996
    Date of Patent: May 22, 2001
    Assignees: Fujitsu Network Communications, Inc., Fujitsu Limited
    Inventors: Stephen A. Caldara, Stephen A. Hauser, Thomas A. Manning
  • Patent number: 6233223
    Abstract: Admission control for a communications link involves maintaining a record at each end of the link of which channels on the link are free and allocating a free channel so that the probability of both ends allocating the same channel to different information flows is controllable. The record of channel identifiers is searched sequentially in different directions by the respective ends of the link to minimise the probability of simultaneous allocation before the records at each end are synchronised. New requests for admission to the link are allowed a different bandwidth threshold than requests for changes to existing connections already admitted to the link.
    Type: Grant
    Filed: August 3, 1999
    Date of Patent: May 15, 2001
    Assignee: Nortel Networks Limited
    Inventors: Martin Sabry, Graeme A Gibbs, Rade Gvozdanovic, Cho Y Tang
  • Patent number: 6233257
    Abstract: A method and system that enables an automatic delay setting within a wireless local loop system. The present invention determines the transmission distance time delay existing between a base station and a personal station by employing the communication interface that is utilized between them. The main reason for determining the transmission time delay caused by large transmission distances (e.g., over 300 meters) existing between base stations and personal stations is to compensate for it. Once the transmission distance time delay is known, the personal station utilizes that value to compensate for it. Specifically, the present invention directs a base station to transmit a control signal to a personal station. The personal station receives the control signal and transmits a signal to the base station. The base station determines if it started to receive the signal from the personal station later than it expected the signal to arrive, assuming close proximity of the two stations.
    Type: Grant
    Filed: October 3, 1997
    Date of Patent: May 15, 2001
    Assignee: VLSI Technology, Inc.
    Inventors: Satoshi Yoshida, Patrick Feyfant, Varenka Martin, Laurent Winckel, Philippe Gaglione, Oliver Weigelt, Denis Archambaud
  • Patent number: RE38457
    Abstract: A method and apparatus is disclosed for data communication between agents, such as those in an electronic conferencing system. In an electronic conferencing a system wherein data is shared between a plurality of participants during an electronic conference users, a method is disclosed for maintaining consistency of the data among the participants during the electronic conference users.
    Type: Grant
    Filed: April 18, 1997
    Date of Patent: March 9, 2004
    Assignee: Intel Corporation
    Inventors: Lewis V. Rothrock, Tyler R. Thessin