Patents Examined by Roberta Stevens
  • Patent number: 6526050
    Abstract: The L4 application in the switch is expanded to permit functions previously performed exclusively in the L5 protocol application. Moreover, the L4 application is programmable by the system operator so that the system operator may expand the predefined set of L4 call management operations to accommodate his call processing requirements. Overall supervision of the call-management operations was previously limited to the L5 applications. However, the ability to program the L4 application enables the system operator to decide which call processing operations will be managed by the L5 applications and which operations will be managed by the L4 application. The system operator may thus define, in the L4 application, a proprietary call model that instructs the switching node to manage all incoming calls, or the system operator may specify the call model on a channel by channel basis. The latter arrangement programs the switching node to use different call-processing protocols among the various channels.
    Type: Grant
    Filed: June 8, 1998
    Date of Patent: February 25, 2003
    Assignee: Excel Switching Co.
    Inventors: Mark P. Hebert, Michael Silva
  • Patent number: 6522659
    Abstract: A TDMA voice information reading apparatus is constituted by two shift registers, a synchronous detection circuit, a selector, an AND gate, a TCH data read window generation circuit, and a clock signal generation circuit. The apparatus includes a processing circuit unit for, when reception data based on time division multiple access is received with a pull-out, delaying the reception data with the pull-out and detecting synchronization before the data is read out, and then reading out voice data and outputting the voice data.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: February 18, 2003
    Assignee: NEC Corporation
    Inventor: Takeshi Anzai
  • Patent number: 6516005
    Abstract: The object of this invention is to realize the correct and prompt synchronization of data in decoding and reproducing multiplexed coded data multiplexed with a plurality of media coded data in the unit of packet without regard to the configuration or characteristics of the apparatus. To achieve a data decoder that can synchronize the video and audio data correctly, the timing controller obtains a buffering time indicated by the time difference between the decoding end time and the specified presentation time contained in the data, and data buffering is performed by buffer memory. The video decoding end time is latched from the system time counter according to a timing pulse generated by the video decoder when the first decoded data is output from video decoder after the data decoder is activated.
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: February 4, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shu Murayama, Takeshi Mio, Hiroshi Honma, Susumu Oka
  • Patent number: 6512755
    Abstract: A system for providing wireless telecommunications access is presented. The system includes a wireline assembly that provides access to a telecommunications system for one or more wireline subscribers. The system also includes a wireless assembly that provides access to a telecommunications system for one or more wireless subscribers. A common control and switching system is connected to the wireline assembly, the wireless assembly, and a switched network. The common control and switching assembly establishes telecommunications channels between the wireline assembly, the wireless assembly, and the switched network, and controls the telecommunications channels.
    Type: Grant
    Filed: December 28, 1998
    Date of Patent: January 28, 2003
    Assignee: Alcatel USA Sourcing, L.P.
    Inventors: Stephen A. Deschaine, Mark A. McDonald, Richard J. Briggs, Jr., Marcus C. Mertsching, Michael B. Flohr
  • Patent number: 6501750
    Abstract: A notification method for providing camp-on capability includes utilizing device-to-device signal exchanges via a data network. As a result, the camp-on capability may be enabled at a called communication device by means of a signal sent from a calling communication device. In the preferred embodiment, the data network is the global communications network referred to as the Internet, but this is not critical. As a response to the determination that the called communication device, such as the telephone, is in an unavailable condition, a first notification signal is transmitted from a calling communication device to the unavailable called device. The first notification signal may be an application program that is automatically executed at the called device. Alternatively, the first notification signal may be a special protocol element that triggers execution of a camp-on program stored at the called device. The first notification signal includes the network address of the calling device.
    Type: Grant
    Filed: June 5, 1998
    Date of Patent: December 31, 2002
    Assignee: Siemens Information & Communication Networks, Inc.
    Inventors: Shmuel Shaffer, William Joseph Beyda
  • Patent number: 6487167
    Abstract: A method which can be implemented on a computer program product for use on a network of autonomous systems to provide an ability to exclude the routing of messages to a destination IP address through a specified autonomous system. On a network in which each autonomous system ignores update messages that already include its identification number and adds it own identification number to update messages that it forwards, the method involves adding the identification number of the specified autonomous system to any update message created for the destination IP address.
    Type: Grant
    Filed: March 10, 1999
    Date of Patent: November 26, 2002
    Assignee: Nortel Networks Limited
    Inventor: Jack Shaio
  • Patent number: 6483833
    Abstract: A method for distributing label binding information, e.g., a binding between a label and a network layer route, in a label switching environment using the Open Shortest Path First (OSPF) Opaque Link State Advertisement (LSA) option protocol. The binding information is included in an application specific field following the LSA header. LS type 9 LSA packets are used to limit the flooding scope to the local network segments attached to the label switch. Address prefix information, i.e., network address and subnet mask, are transmitted and associated with a label in the application specific field of the Opaque LSA packet. The Opaque LSA packets are exchanged between a group of interconnected Opaque LSA capable label switches so that the label switches can maintain their label forwarding tables and routing tables as necessary to forward data packets according to a label swapping forwarding paradigm.
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: November 19, 2002
    Assignee: Nortel Networks Limited
    Inventors: Shantigram Jagannath, Jim Luciani, Naganand Doraswamy
  • Patent number: 6469991
    Abstract: In the method for overload control in a wireless communications network employing On-Demand Multiple Access Fair Queuing, if the downlink/uplink buffer occupancy of the network has exceeded a high threshold, the base station determines if this is caused by a specific remote host or by a group of remote hosts. If caused by a specific remote host, the base station normally sends a flow control signal to the remote host to prevent it from sending more data, but may alternatively elect to disconnect other remotes if the remote experiencing bad performance is of a higher priority. The base station may additionally reduce the bandwidth shares allocated to any remote that have indicated tolerance for a variable allocated bandwidth. If the measured frame error rates for many remote hosts are increasing, then the base station may elect to disconnect those remote hosts that permit service interruption in order that more bandwidth may be allocated to the remaining users.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: October 22, 2002
    Assignee: Lucent Technologies Inc.
    Inventor: Mooi Choo Chuah
  • Patent number: 6469992
    Abstract: To achieve an improved utilization of a radio link channel in a wireless packet oriented transmission system data packets are transmitted between a transmission apparatus (10) and a mobile unit (14), respectively. Then it is determined whether a data packet transmission between the transmission apparatus (10) and the mobile unit (14) has been carried out successfully. Here, a transmission channel (16) is reassigned to another mobile unit (14) in a case that it is determined that the transmission of the data packet was not successful and further a retransmission of a data packet is estimated to be not successful.
    Type: Grant
    Filed: October 21, 1998
    Date of Patent: October 22, 2002
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Andreas Schieder
  • Patent number: 6466548
    Abstract: Loopback interfaces are put into routers in a packet switched network. When an end to end Quality of Service (QoS) path is not performing adequately, the delay and jitter characteristics are measured for individual network subsystems. An audio signal is converted into a stream of audio packets and sent hop by hop to the different routers in the network having the loopback interface. QoS is determined by looping back the stream of audio packets from the different routers. If necessary, the network is reconfigured according to loopback delay in the individual network subsystems. Reconfiguration can comprise routing telephone calls through different paths in the network or adding additional equipment to increase capacity.
    Type: Grant
    Filed: October 28, 1998
    Date of Patent: October 15, 2002
    Assignee: Cisco Technology, Inc.
    Inventor: Cary W. Fitzgerald
  • Patent number: 6449272
    Abstract: A virtual dial-up service is provided via multiple Internet Service Provides (ISPs). In particular, a remote user accesses the virtual dial-up service by establishing a connection to a serving ISP. The Serving ISP establishes a first tunnel to an anchor ISP. The latter establishes a tunnel to, e.g., a private intranet. As a result, a virtual private network (VPN) service is provided that enables remote access, via multiple tunnels, to a private network.
    Type: Grant
    Filed: May 8, 1998
    Date of Patent: September 10, 2002
    Assignee: Lucent Technologies Inc.
    Inventors: Mooi Choo Chuah, Girish Rai
  • Patent number: 6449288
    Abstract: A bi-level framing structure for DSL phone systems uses 4 KHz physical frames and mux data frames. The mux data frames each start with a sync byte and contain user payload bytes. A group of mux data frames are appended with forward-error-correction FEC bytes to make a codeword. The codeword is then partitioned into physical 4-KHz frames. The physical frames are transformed by an inverse fast-Fourier transform (IFFT) outputting symbols at 4 KHz for transmission. For high line rates, each codeword has S mux data frames and S physical frames. There are also at least S FEC bytes if error correction is enabled. However, for lower line rates, there are S physical frames but only S/M mux data frames in each codeword. The efficiency factor M is 1 for high line rates, but 4 for lower line rates. Reducing the number of mux data frames reduces the number of sync bytes in a codeword, decreasing overhead. The FEC bytes are spread among more physical frames, reducing error-correction overhead.
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: September 10, 2002
    Assignee: Centillium Communications, Inc.
    Inventors: Sriraman Chari, Anthony J. P. O'Toole
  • Patent number: 6438136
    Abstract: A full service channel access protocol that supports the integrated transport of voice, video and data communications is provided by dividing a communication channel into a plurality of frames, dividing each of the frames into a plurality of slots, and dividing some of the plurality of slots into a plurality of mini-slots. The mini-slots are provided for use by the multiple communication sources to request the establishment of a new voice, data, or video transmission connection over the communication channel. Additionally, a second one of the plurality of slots is divided into a plurality of second mini-slots for use by the multiple communication sources to request the establishment of a new voice, data, or video transmission connection over the communication channel and for use by the multiple communication sources to augment an existing video connection over the communication channel.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: August 20, 2002
    Assignee: Microsoft Corporation
    Inventor: Paramvir Bahl
  • Patent number: 6434117
    Abstract: In a communication network where IEEE-1394 nodes are connected to a serial bus, each node functions as a source or a destination for signaling an asynchronous channel setup request containing a multicast address and signaling an asynchronous channel release request. A multicast manager, connected to the bus, includes a channel allocation table having a number of entries each mapping a channel number to a multicast address. The multicast manager responds to the setup request for making a search through the allocation table, setting a node count value to 1, acquiring ownership of a channel number from an isochronous resource manager and mapping the acquired channel number to the multicast address of the request in a corresponding entry of the allocation table if no channel number was mapped to the multicast address or incrementing the node count value by 1 if a channel number is mapped to the multicast address, and then signaling a reply message.
    Type: Grant
    Filed: March 5, 1999
    Date of Patent: August 13, 2002
    Assignee: NEC Corporation
    Inventor: Morihisa Momona
  • Patent number: 6424657
    Abstract: Offering vertical services to subscribers and service providers is an avenue to immediately improve the competitiveness of digital subscriber line access service, for example of the type offered by a local exchange carrier. To deliver high-quality vertical services, however, the underlying ADSL Data Network (ADN) or the like needs to establish Quality of Service (QoS) as a core characteristic and offer an efficient mechanism for insertion of the vertical services. The inventive network architecture introduces QoS into the ADN, in a manner that enables the delivery of sophisticated and demanding IP-based services to subscribers, does not affect existing Internet tiers of service, and is cost-effective in terms of initial costs, build-out, and ongoing operations.
    Type: Grant
    Filed: December 26, 2000
    Date of Patent: July 23, 2002
    Assignee: Verizon Communications Inc.
    Inventors: Eric A. Voit, Robert T. Baum
  • Patent number: 6404774
    Abstract: Asymmetric Digital Subscriber Line (ADSL) data service and Plain Old Telephone Service (POTS) are provided over a subscriber loop by an ADSL transceiver and a control processor located in a local communication center, and a subscriber ADSL modem at the subscriber location. The control processor is responsive to a detection of an origination of a POTS call for generating a first control signal that causes the ADSL transceiver to load ADSL data into tone bins which are only in a frequency band above a predetermined frequency band used for a POTS call for data transmissions over the subscriber loop. The control processor is also responsive to a detection of a termination of a POTS call for generating a second control signal that causes the ADSL transceiver to load ADSL data into tone bins which are in both the predetermined frequency band used for a POTS call and the frequency band thereabove for ADSL data transmissions over the subscriber loop.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: June 11, 2002
    Assignee: Siemens Information and Communication Networks, Inc.
    Inventor: Robert Jenness
  • Patent number: 6404761
    Abstract: Systems for connecting telecommunications infrastructure lines to telephones, handsets, computers, telecopy machines and other end user interfaces or consumer electronics devices in a residence or business. Systems according to the present invention include Network Control Units which form the center of a star topology and which communicate via RF link with Wireless Access Units and handsets. Wireless Access Units feature an interface, such as, for example, a standard telephone jack, for accommodating a telephone, a fax machine, a compute modem or other device. Computers or other devices may also be accommodated by Wireless Access Units having other physical and virtual interfaces, including, for instance, serial ports or network interfaces. The Wireless Access Units may also be digital to accommodate ISDN or any other digital standard.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: June 11, 2002
    Assignee: Home Wireless Networks, Inc.
    Inventors: Richard K. Snelling, P. Stuckey McIntosh, John C. W. Taylor, Mark Tucker
  • Patent number: 6404762
    Abstract: A Universal Messaging system provides e-mail, voice-mail and fax-mail services to subscribers that may utilize the Internet to access their messages. The system integrates an e-mail messaging system with a voice/fax messaging system on a messaging platform computer. E-mail messages are stored in an e-mail message store, and voice and/or fax messages are stored in a separate store controlled, e.g., by a Voice Mail Message Manager (VMMM). Subscribers can access messages from a personal computer via the Internet using a standard Web browser with an applet that present each subscriber with a “universal inbox” that displays all of that subscriber's voice, fax, and e-mail messages. A Web platform controls the Web browser interface to the messaging platform, accepting requests from the Web browser (such as a request to read an e-mail or listen to a voice mail) and passing prescribed types of information back to the Web browser.
    Type: Grant
    Filed: June 9, 1998
    Date of Patent: June 11, 2002
    Assignee: Unisys Corporation
    Inventors: Nicholas M. Luzeski, Daniel P. Meyer, Allie A. Murphy, John L. Homan, Gary Paul Russell
  • Patent number: 6404736
    Abstract: A method and apparatus enables a Network Access Server together with a telecommunications switch to route incoming calls only to devices that have sufficient resources to provide a connection to the Internet. A set of devices, RPs, reformat incoming data from subscribers to a desired Internet Protocol. During operation, each RP performs self-checks to determine whether sufficient resources exist within the RP for providing Internet communication. An example of such a resource is an Internet protocol (IP) address pool. Each RP may have several IP address pools that are associated with individual Internet service providers (ISPs). If, for example, an individual ISP's IP address pool is depleted within a particular RP, then that RP signals as much to call routing logic. The call routing logic will not route calls for that individual ISP to that particular RP until the call routing logic receives another signal indicating that the depleted resource has been replenished.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: June 11, 2002
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Jari Arkko, Seppo Arponen
  • Patent number: 6393009
    Abstract: This present invention relates to a method for managing trunk status of a CDMA mobile communication exchange. A CDMA mobile communication exchange according to the present invention has the logical trunk and physical trunks relation to the trunk status, which respectively are managed in separate subsystems, and handles the physical trunks distributed and implemented in various subsystems as a single route through the use of the logical trunk structure in order to manage it in a single subsystem, such that the easy route management and route data collection are made possible. Further, the duplicate management are made for the trunk status through separate systems, which allows thus program for managing logical trunk status to collect trunk status from subsystem for managing physical trunk status and vice versa. Therefore, an effective management for the trunk status can be accomplished, and the route management and routing functions are further improved.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: May 21, 2002
    Assignees: Electronics and Telecommunications Research Institute, SK Telecom Co., Ltd.
    Inventors: Yeon Seung Shin, Jung Mo Moon, Dae Sik Kim