Patents Issued in January 20, 2004
  • Patent number: 6680899
    Abstract: An optical information medium comprising a supporting substrate, an information recording area on the supporting substrate, and a light-transmitting layer covering at least the information recording area, wherein the information recording area is irradiated with the recording/reading laser beam through the light-transmitting layer, and wherein the light-transmitting layer is highly scratch resistant upon contact with the optical pickup is provided. Also provided is an optical information medium which has a scratch-resistant light transmitting layer, and which experiences reduced vibration in high-speed rotation without suffering from problems in focus servo and tracking servo. In such optical information medium, the surface of the medium on the side of the laser beam incidence at least in the part above the information recording area has a dynamic coefficient of friction of up to 0.4.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: January 20, 2004
    Assignee: TDK Corporation
    Inventors: Tsuyoshi Komaki, Hideki Hirata, Naoki Hayashida, Toshifumi Tanaka
  • Patent number: 6680900
    Abstract: An optical-pickup slider is characterized in that a light-transmitting-property substrate is bonded to a surface of a layer having a tapered through hole, on which surface a larger opening of the tapered through hole exists. Thereby, it is possible to prevent the layer having an aperture from being destroyed. A method of manufacturing the optical-pickup slider comprises the steps of a) making a tapered through hole in a layer layered on a first substrate and having a thickness smaller than that of the first substrate; and, after bonding a light-transmitting-property substrate to a surface of the layer, removing the first substrate so as to expose an aperture at a tip of the tapered through hole.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: January 20, 2004
    Assignees: Ricoh Company, Ltd., Kanagawa Academy of Science and Technology
    Inventors: Junichi Takahashi, Motonobu Kourogi, Takashi Yatsui, Motoichi Ohtsu
  • Patent number: 6680901
    Abstract: In order to shorten delay time in a synchronization circuit in an OFDM demodulator, with respect to a preamble for estimating carrier frequency/channel characteristic, the synchronization circuit does not have a delay circuit and a frequency error compensation signal of a carrier frequency estimating circuit is supplied to a channel distortion estimating circuit connected to an output of an FFT. In the channel distortion estimating circuit, a carrier frequency deviation is compensated.
    Type: Grant
    Filed: March 27, 2000
    Date of Patent: January 20, 2004
    Assignee: NEC Corporation
    Inventors: Takeshi Yamamoto, Kazuhiro Okanoue, Tomoki Osawa
  • Patent number: 6680902
    Abstract: The disclosure relates to wireless communications such as cdma systems where variable orthogonal spreading factors are employed. Code words are selected from a representation known as the orthogonal variable spreading factor (OVSF) tree, which allows code words of different length to be mixed yet remain orthogonal. The present invention provides a system whereby a subset of codes are employed whereby the bit rate can be reduced. This is of particular advantage under poor propagation conditions. Mutual interference between users is reduced.
    Type: Grant
    Filed: January 20, 2000
    Date of Patent: January 20, 2004
    Assignee: Nortel Networks Limited
    Inventor: John E Hudson
  • Patent number: 6680903
    Abstract: In a network of a topology of a loop and a bus, occurrence of a failure is detected and a location of the failure is specified. Occurrence of the failure is detected by detecting that a specific signal pattern to be received at regular time intervals within a fixed time period is not received. A node which has detected occurrence of the failure transmits or receives a specifying signal among the nodes, and decide whether or not the failure has occurred adjacently to itself. A packet indicating a decided location of the failure is transmitted or received among nodes, and thereby respective nodes specify the location of the failure. When the failure has occurred at the master node, a node having a smallest node ID after waiting time according to the node ID operates as the alternative master node.
    Type: Grant
    Filed: July 7, 1999
    Date of Patent: January 20, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kenichi Moriguchi, Toshihisa Ikeda, Yuji Mizuguchi, Takahisa Sakai, Toshikazu Hattori
  • Patent number: 6680904
    Abstract: Network access apparatus includes first and second master units, each having a physical interface to a packet-switched network. A plurality of slave units, each slave unit having one or more ports to respective subscriber lines, are linked by a plurality of physical interface lines in one or more daisy chains, in which the slave units are mutually connected in series by the physical interface lines therebetween. Each daisy chain includes at least a first slave unit connected by one of the physical interface lines to the first master unit and a last slave unit connected by another of the physical interface lines to the second master unit.
    Type: Grant
    Filed: December 27, 1999
    Date of Patent: January 20, 2004
    Assignee: Orckit Communications Ltd.
    Inventors: Menachem Kaplan, David Zelig, Roy Kinamon, Eli Aloni, Ron Sdayoor, Eric Paneth, Eli Magal
  • Patent number: 6680905
    Abstract: A transfer path control system has a first transfer device and a second transfer device connected through a first transfer path and a second transfer path to the first transfer device. The first transfer device has an adding unit adding index data to data transmitted to the first and second transfer paths.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: January 20, 2004
    Assignee: Fujitsu Limited
    Inventor: Taichi Ishikawa
  • Patent number: 6680906
    Abstract: Methods and mechanisms for regulating network packet traffic in an integrated services network, by selectively dropping packets of particular traffic, are described. Packets of network traffic arriving at an input port of a router or switch are selectively copied to one of two queues according to the type of transmission (voice, video, data) represented by the packets. A first queue receives traffic requiring guaranteed bandwidth and the second queue receives traffic requiring guaranteed minimum delay. Data in the packets indicates when the packet should be dropped relative to other packets in a packet stream. The process of marking packets with data used to indicate a drop order is referred to herein as marking packets. A network device that receives marked packets, for example, a router, may drop some of packets according to a drop policy based on the values used to mark the packets.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: January 20, 2004
    Assignee: Cisco Technology, Inc.
    Inventor: Khanh Vinh Nguyen
  • Patent number: 6680907
    Abstract: A shaping method for use by a shaper in a communication network for converting an incoming data flow with an incoming data packet rate into an outgoing data flow with an outgoing data packet rate. The shaper includes a buffer which is leaked at the outgoing data packet rate in order to provide the outgoing data flow. The shaping method determines a value of a future incoming data packet rate of the incoming data packet rate, and determines a buffer occupancy value related to the number of data packets of the incoming data flow received by the buffer included in the shaper. The buffer is leaked at the outgoing data packet rate in order to provide the outgoing data flow. The shaping method also determines the value of the outgoing data packet rate as a function of the value of the future incoming data packet rate, the value of the buffer occupancy, the value of a predetermined peak data packet rate and the value of a predetermined minimum data packet rate.
    Type: Grant
    Filed: September 8, 1999
    Date of Patent: January 20, 2004
    Assignee: Alcatel
    Inventor: Olivier Bonaventure
  • Patent number: 6680908
    Abstract: A network switch includes a plurality of receive ports for receiving addressed data packets and a plurality of transmit ports for forwarding the addressed data packets and structure responsive to data in said the packets for directing received packets to the transmit ports. In respect of at least one of the transmit ports the switch includes an output buffer for storing data packets before they are forwarded from the port and an allocation controller. The allocation controller allocates each packet destined for the buffer and each packet leaving the buffer for the port into at least one of a plurality of categories, which may be based on priority or protocol data and may define traffic types such as video or audio.
    Type: Grant
    Filed: October 13, 1999
    Date of Patent: January 20, 2004
    Assignee: 3Com Corporation
    Inventors: Patrick Gibson, Kam Choi, Christopher Hay, Gareth E Allwright
  • Patent number: 6680909
    Abstract: Master-Slave Queue-State-Dependent Packet Scheduling Policies use the information about Master and Slave queues to achieve better system performance. The scheduling methodology is implemented at the Master and therefore has access to information about the Master queues. Different kinds of information about the queues such as backlog, size, delays can be used.
    Type: Grant
    Filed: November 4, 1999
    Date of Patent: January 20, 2004
    Assignee: International Business Machines Corporation
    Inventors: Deepak Bansal, Manish Kalia, Rajeev Shorey
  • Patent number: 6680910
    Abstract: Briefly, in accordance with one embodiment of the invention, a system includes: a network interface unit (NIU). The network interface unit (NIU) is adapted to monitor bandwidth utilization of the network interface unit and adjust the minimum interval for the transmission of a flow control packet, based, at least in part, on the bandwidth utilization determination. Briefly, in accordance with another embodiment of the invention, an apparatus includes at least one integrated circuit. The integrated circuit includes the capability, either alone or in combination with other integrated circuits, to monitor the receive rate utilization of a network interface unit and adjust the minimum interval for the transmission of a flow control frame, based, at least in part, on the receive rate utilization determined.
    Type: Grant
    Filed: June 26, 1998
    Date of Patent: January 20, 2004
    Assignee: Intel Corporation
    Inventor: Jie Ni
  • Patent number: 6680911
    Abstract: An apparatus and method for controlling the data flow of the Ethernet hub in a half-duplex mode, wherein the hub includes a switch to control data packets flowing through a plurality of communication ports. The system includes a destination address (DA) detector for detecting the DA of the data packet received through the input-port of the communication port to determine whether the data packet is to be treated by the switch, a logic gate for generating a selection signal based on the determination of the DA detector and an overload signal supplied by the switch when the hub is overloaded with the data packets, a jamming signal generator for generating a jamming signal in response to the selection signal, a MAC for converting the data packet into a bit stream as set forth in a carrier-sense multiple access with a collision detection (CSMA/CD) protocol, and a selector for selectively transmitting the jamming signal or the packet from the MAC in response to the selection signal.
    Type: Grant
    Filed: December 28, 1999
    Date of Patent: January 20, 2004
    Inventor: In Kim
  • Patent number: 6680912
    Abstract: The disclosed network includes two rings, wherein a first ring transmits data in a clockwise direction, and the other ring transmits data in a counterclockwise direction. The traffic is removed from the ring by the destination node. During normal operations (i.e., all spans operational), data between nodes flows on the ring that would provide the minimum number of hops to the destination node. Thus, both rings are fully utilized during normal operations. The nodes periodically test the bit error rate of the links (or the error rate is constantly calculated) to detect a fault in one of the links. The detection of such a fault sends a broadcast signal to all nodes to reconfigure a routing table within the node so as to identify the optimum routing of source traffic to the destination node after the fault.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: January 20, 2004
    Assignee: Luminous Networks, Inc.
    Inventors: Robert F. Kalman, Jason C. Fan, Charles F. Barry, Prasad P. Jogalekar, Vinay K. Bannai
  • Patent number: 6680913
    Abstract: A mobile station comprises means (301, 302, 303, 304, 326) for receiving downlink data from test equipment and means (331, 310, 311, 312, 313) for sending uplink data to the test equipment. To test data channel operation a test loop (204, 332, 333) is established to loop downlink data received from the test equipment back to the uplink direction to the test equipment. During the test, the reception of downlink data and transmission of uplink data in the mobile station are controlled by a relatively low protocol level.
    Type: Grant
    Filed: June 3, 1999
    Date of Patent: January 20, 2004
    Assignee: Nokia Mobile Phones Ltd.
    Inventors: Kari Malmivirta, Olli Varjus, Tapio Saarinen, Petri Kotilainen
  • Patent number: 6680914
    Abstract: A method for optimizing the performance of the code division multiple access system and the air field environments is disclosed. The invention includes the step of connecting a CDMA mobile station to a PC (Personal Computer), the step of connecting a GPS (Global Positioning System) to the PC, the step of operating a DM (Diagnostic Monitor) under a windows OS (Operating System), the step of requesting desired data to be transmitted to the mobile station by the DM, the step of measuring corresponding items and the present state [OF WHAT?] and transmitting the measured data to the DM, the step of requesting the data of the present position to the GPS by the DM, the step of transmitting the data of the present position to the DM by the GPS, the step of analyzing the data received from the mobile station and the GPS by the DM, and the step of displaying the analyzed results.
    Type: Grant
    Filed: June 1, 1999
    Date of Patent: January 20, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-saeng Jung, Won-il Cho, Jae-ho Jeong
  • Patent number: 6680915
    Abstract: A router, which is basically a point-to-point communication router, is devised for the BUS-like communication between processors. Therefore, it is named as ‘Virtual Bus’. One processor is connected to one router and the router can be connected in one dimensional array or two dimensional arrays. In case of two dimensional arrays, there are row and column router controllers. The method of communication consists of two phases: Firstly, the path between source processor and destination processor by sending set-up message. Secondly, messages are transferred without intervention of the intermediate routers between the source and destination processors. The idea is that the intermediate routers are set up to by-passing mode at the set-up phase. That is the routers in by-passing mode just relay the incoming messages to their output ports without any interruption. Therefore the virtual bus can guarantee high speed communication between processors.
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: January 20, 2004
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Kyu Ho Park, Jong Hyuk Choi, Bong Wan Kim
  • Patent number: 6680916
    Abstract: The invention provides a method for using a balanced tree as a base for a routing table. In one embodiment of the invention the routing table is stored as a binary search tree data structure in which a key value of each node in the tree corresponds with a network address of a network in the routing table. The tree is then rearranged so that any node having a key value which is a supernet of a network corresponding to the key value of any other node in the tree becomes a parent of such other node. In a preferred embodiment, the binary tree data structure is implemented as a red-black tree data structure.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: January 20, 2004
    Assignee: Tut Systems, Inc.
    Inventor: Ian Puleston
  • Patent number: 6680917
    Abstract: Modifications to the spanning tree algorithm allow bad news to propagate quickly by providing that protocol entities on bridges process inferior information sent by the designated bridge for each LAN. In addition, bridges use per port hello timers to stimulate information propagation, setting it to suit local link characteristics. No changes to the format of bridge protocol data units (BPDUs) as specified in the IEEE Standard 802.1D are required, and the algorithm for computing the topology of the network remains unchanged. Techniques have been adopted for expiring information and recomputing the spanning tree upon detection of link failure, upon receipt of a message having a message age greater than its accompanying maximum age, or if the port hello time algorithm detects a loss of link. Rules for propagating information are provided allowing rapid propagation of changes. Finally, techniques for burning out information in a configuration message are adopted.
    Type: Grant
    Filed: January 28, 2003
    Date of Patent: January 20, 2004
    Assignee: 3Com Corporation
    Inventor: Michael John Seaman
  • Patent number: 6680918
    Abstract: An intra-train communication network comprising a plurality of transceiver units on individual vehicles of the train. A master unit initially transmits queries, including a first ID from a first group of ID's, to the slave units using a second ID from a second group of ID's, and subsequently transmits queries using the first ID from the first group. The slave units initially listens for queries using the second ID from the second group, responds using the second ID and subsequently listens for and responds using the first ID.
    Type: Grant
    Filed: September 7, 1999
    Date of Patent: January 20, 2004
    Assignee: New York Air Brake Corporation
    Inventor: John E. Haley
  • Patent number: 6680919
    Abstract: A method operates a mobile communication terminal or MCT (10) by the steps of: (A) determining, at the MCT 10, a location of the MCT in accordance with Global Positioning System (GPS) inputs, (B) transmitting a signal that indicates the GPS-determined location, the signal being transmitted from the MCT to a network service provider or NSP (30), and (C) downloading data to the MCT 10 from the network service provider 34 or from a server (40, 42) that is coupled to the network service provider through a data communications network (38). The downloaded data is selected in accordance with the GPS-determined location of the MCT. The step of determining may employ a GPS capability of the MCT or a GPS capability of a GPS accessory (28) that is coupled to the MCT. In one embodiment the downloaded data is comprised of map data, while in another embodiment the downloaded data is comprised of at least one of operating software or an operating protocol. The data may be downloaded as a background task.
    Type: Grant
    Filed: February 4, 2000
    Date of Patent: January 20, 2004
    Assignee: Nokia Corporation
    Inventor: Kristian Rauhala
  • Patent number: 6680920
    Abstract: A power management system for a mobile station reduces standby mode processing by receiving and processing single time slots of a short paging channel. Each single time slot of a short paging channel includes a mobile station identifier which alerts a receiving mobile station that a pending telephone call or paging message may be directed to the mobile station. Once so alerted, the mobile station receives and processes full paging channels comprising four time slots to determine whether the mobile station is the intended recipient of the telephone call or paging message. If the mobile station determines that it is not the intended recipient, then the mobile station resumes receiving and processing single time slots of the short page channel. Processing fewer time slots of data for purposes of call detection conserves mobile station battery power.
    Type: Grant
    Filed: February 8, 2000
    Date of Patent: January 20, 2004
    Assignee: Skyworks Solutions, Inc.
    Inventor: Yongbing Wan
  • Patent number: 6680921
    Abstract: Techniques are provided for efficiently compressing and reconstructing the time stamp value of a real time communications packet whose time stamp value does not fall within a normally expected sequence of time stamp values. A first part of the time stamp value is selected by the header compressor and transmitted. A second part of the time stamp value is estimated by the header decompressor based on elapsed time between receipt of consecutive packets. The header decompressor combines the second part with the first part received from the header compressor to produce a reconstructed time stamp value.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: January 20, 2004
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Krister Svanbro, Lars-Erik Jonsson
  • Patent number: 6680922
    Abstract: A packet-centric wireless point to multi-point telecommunications system includes a wireless base station coupled to a first data network; one or more host workstations coupled to the first data network; one or more subscriber customer premise equipment (CPE) stations in wireless communication with the wireless base station over a shared wireless bandwidth using a packet-centric protocol; and one or more subscriber workstations coupled to each of the subscriber CPE stations over a second network; resource allocator optimizing end-user quality of service (QoS) and allocating shared bandwidth among the subscriber CPE stations; a scheduler to schedule an internet protocol (IP) flow over the shared wireless bandwidth. The scheduler includes a prioritizer for prioritizing the IP flow based on priorities of a virtual private network (VPN). The system can include an analyzer for analyzing the virtual private network (VPN) priorities for the IP flow, or for prioritizing all VPN IP flows.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: January 20, 2004
    Assignee: Malibu Networks, Inc.
    Inventor: Jacob W. Jorgensen
  • Patent number: 6680923
    Abstract: A system and method for establishing communication with any one of a variety of different wireless communication devices including through the provision of a short range transceiver assembly so as to provide data communication from a sender to the wireless communication device either over the Internet, utilizing an Internet access facility, such as a computer, or alternatively using an over-the-air network, compatible with the communication device. The wireless communication device is structured to operate on either of at least two independent frequencies for communication with the computer or with the over-the-air network, dependent on predetermined parameters including the acceptance of a unique identifier or code and/or the positioning of the wireless communication device, within a predetermined vicinity range relative to the computer.
    Type: Grant
    Filed: May 23, 2000
    Date of Patent: January 20, 2004
    Assignee: Calypso Wireless, Inc.
    Inventor: Robert Leon
  • Patent number: 6680924
    Abstract: A method for estimating signal strengths for a wireless environment. The method includes measuring a strength of a first radio signal at a plurality of locations in the environment, wherein the first radio signal is transmitted from a radio transmitter at a first location, estimating the strength of the first radio signal at each of the plurality of locations, and estimating a strength of a second radio signal at the plurality of locations, wherein the second radio signal corresponds to a signal transmitted from one of the plurality of locations, based on a difference between the measured signal strength and the estimated signal strength for the first radio signal.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: January 20, 2004
    Assignee: Carnegie Mellon University
    Inventors: Alexander H. Hills, Jon P. Schlegel, Benjamin C. Jenkins
  • Patent number: 6680925
    Abstract: In a disclosed embodiment, signal levels of the active sectors of an access terminal are compared with the signal level of the current serving sector of the access terminal. Next, a delta credit is accumulated. If a DRC lock bit is available, then an accumulated total credit is authorized to produce an authorized accumulated total credit. Afterwards, a new serving sector is identified from a pool of candidate sectors based on the signal levels of the active sectors and the authorized accumulated total credits.
    Type: Grant
    Filed: October 16, 2001
    Date of Patent: January 20, 2004
    Assignee: Qualcomm Incorporated
    Inventors: Qiang Wu, Nagabhushana Sindhushayana, Peter J. Black, Rajiv Vijayan, Rashid Attar
  • Patent number: 6680926
    Abstract: Reverse link busy bits are independently generated by each base station and indicate whether a base station has reached a reverse link capacity limit. A remote station combines multipath components of the reverse link busy bits in its Active Set and in response transmits a reverse link signal only when all of the reverse link busy bits indicate that the base stations in the Active Set have reverse link capacity. In one description, the remote station weights the reverse link busy signals in accordance with the signal strength of the transmitting base station and determines whether to transmit based on the weighted sum of the busy signals. In another description, the remote station weights the reverse link busy signals in accordance with the signal strength of the transmitting base station and determines a maximum reverse link data rate based on the weighted sum of the busy signals.
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: January 20, 2004
    Assignee: Qualcomm, Incorporated
    Inventors: Paul E. Bender, Matthew S. Grob, Gadi Karmi, Roberto Padovani
  • Patent number: 6680927
    Abstract: In a compressed mode, a spread spectrum communication device interleaves bit units across multiple frames using an interleaver, reduces the spreading factor using a framing/spreading unit, outputs the compressed mode frames at a predetermined compressed mode frame timing, and increases the average transmission power in the compressed mode at a radio frequency transmitter. Furthermore, a handover between different frequencies is carried out by establishing synchronization to another frequency carrier, based on a first search code and a second search code which have been detected, and moreover, a handover between different communication systems is carried out by establishing synchronization to a GSM, based on an FCCH and a SCH which have been detected.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: January 20, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yasuhiro Yano, Hideshi Murai
  • Patent number: 6680928
    Abstract: In CDMA systems, a message to be transmitted is redundantly coded for transmission using a combination of error-correction coding and a spread-spectrum access code. The coded message is modulated to a first radio frequency channel, or band, and also to at least one other frequency channel, which may be either an adjacent or a non-adjacent channel. Other messages for transmission are generated likewise and the signals for transmission on the first channel are summed using a set of weighting factors, with the weighted sum transmitted on the first channel. The same signals are summed for transmission on the at least one other frequency channel, but using weighting factors that have a progressive relative phase rotation compared to their Values on the first channel. The sequence of weighting factors used for one signal across the different frequency channels is preferably orthogonal to the sequence of weighting factors used for a different signal.
    Type: Grant
    Filed: June 28, 1999
    Date of Patent: January 20, 2004
    Assignee: Ericsson Inc.
    Inventor: Paul W. Dent
  • Patent number: 6680929
    Abstract: Preferred embodiments of this invention provide a base station and a terminal appropriate for a protocol for realizing a high performance and a low delay by relaying in a base station only if a direct transmission is not performed between terminals and omitting a data transmission channel for relaying if the direct transmission is performed. When a receiver terminal receives data directly from a sender terminal, the receiver terminal transmits a report of a direct receipt of the data to the base station. When the base station receives the report of the direct receipt of the data, the base station omits the data transmission channel for relaying.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: January 20, 2004
    Assignees: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Noboru Iida, Noritaka Fukagawa, You Ueno, Takashi Watanabe, Tadanori Mizuno
  • Patent number: 6680930
    Abstract: A radio frequency communications system (100) includes wireless terminals (102) and base sites (104). The wireless terminals communicate with the base sites over a radio frequency channel (106). The base sites are interconnected to each other and other network elements via a packet network. A method and apparatus determine for a particular delay-sensitive application on the wireless terminal, for example, an audio or video transmission, the requirements for bandwidth for transmission over the radio frequency channel (500, 502). After the requirements on the radio frequency channel are determined, the necessary channel bandwidth, if available, is reserved or allocated to guarantee performance to the application (510). The reserved bandwidth is utilized by selectively granting access to the radio frequency channel on the basis of the bandwidth allocated to the device.
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: January 20, 2004
    Assignee: Motorola, Inc.
    Inventors: Donald G. Newberg, Tyrone D. Bekiares, Gregory A. Dertz, Bradley M. Hiben, Kevin G. Doberstein
  • Patent number: 6680931
    Abstract: An object of the present invention is to make it easy to recognize a start point and an end point of each music piece, when a plurality of music pieces are broadcasted. A music piece broadcast end information bit, which is reversed in its logic when a broadcast of a music piece ends, is newly added to information to be multiplexed and transmitted.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: January 20, 2004
    Assignee: Denon, Ltd.
    Inventors: Yuichi Aigasa, Yoshio Oomori
  • Patent number: 6680932
    Abstract: A method for synchronizing the time and frequency of an incoming packet of transmitted information with a receiver in a wireless communication system includes a synchronization method which may reduce the adverse effects of delay spread introduced by a bad channel. The method includes assigning a plurality of samples in a received synchronization segment of an incoming packet to corresponding bins, determining a number of phase test failures in each bin, and selecting the bin having the fewest number of phase test failures and the fewest number of small samples for synchronizing the time of the incoming packet with the receiver. Additionally, the method calculates the phase drift for the selected bin so that the frequency of the incoming packet is synchronized with that of the receiver.
    Type: Grant
    Filed: March 10, 2000
    Date of Patent: January 20, 2004
    Assignee: Lucent Technologies Inc.
    Inventors: Yi Hsuan, Peter Thomas Monsen
  • Patent number: 6680933
    Abstract: A telecommunications switch for switching protocol data units across communications links connecting the switch into a communications network and supporting multiple service types concurrently is disclosed. The switch includes an ingress processor for receiving protocol data units from a communications link, an egress processor for transmitting protocol data units onto another communications link, and a switching fabric for routing protocol data units from the ingress processor to the egress processor. The switch includes a structure of queues and schedulers that is arranged to provide concurrent class-based and flow-based queuing and scheduling of the protocol data units. This arrangement allows an amount of switching bandwidth to be guaranteed to protocol data units belonging to a given flow and allows classes of service within the flow to be allocated a relative proportion of that bandwidth.
    Type: Grant
    Filed: September 23, 1999
    Date of Patent: January 20, 2004
    Assignee: Nortel Networks Limited
    Inventors: Julian J. Cheesman, Norman A. Lyon, Stacy S. Nichols
  • Patent number: 6680934
    Abstract: A system, device, and method for expediting control flow in a communication system involves establishing a separate control channel for high priority control messages between two network nodes and exchanging high priority control messages over the control channel. The control channel may be a physical or virtual channel. Within a particular network node, a separate high priority queue is used for transferring high priority control messages between a control plane and a forwarding plane.
    Type: Grant
    Filed: December 2, 1999
    Date of Patent: January 20, 2004
    Assignee: Nortel Networks Limited
    Inventor: Bradley Cain
  • Patent number: 6680935
    Abstract: The present invention provides a method, system and device/phone/computer for anonymous call rejection in an Internet Protocol telephony network. The method includes the steps of: determining whether a caller identification ID is available/identifiable for an incoming call; and rejecting the incoming call where the caller ID is unavailable or unidentifiable. The system includes a Caller Identification Unit, for determining whether a caller identification ID is available/identifiable for an incoming call and a Call Rejection Unit, coupled to the Caller Identification Unit, for rejecting the incoming call where the caller ID is unavailable or unidentifiable. A device/phone/computer of the invention provides a caller identification processing/rejecting unit and a transceiver. The caller identification processing/rejecting unit determines whether a caller identification ID is available or identifiable for an incoming call and rejects the incoming call where the caller ID is unavailable or unidentifiable.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: January 20, 2004
    Assignee: AT&T Corp.
    Inventors: Fen-Chung Kung, Jesse Eugene Russell, Spencer Wang, Hopeton Walker
  • Patent number: 6680936
    Abstract: A digital multiplexer circuit includes an input transmission line structure receiving input signals, multiplexing blocks having input terminals that are successively coupled together by the input transmission line structure, and an output transmission line that successively couples output terminals of the multiplexing blocks and receives output signals from multiplexing blocks.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: January 20, 2004
    Assignee: Intel Corporation
    Inventors: Ulrich Keil, Vagelis Tsakas, George Souliotis
  • Patent number: 6680937
    Abstract: This proposal outlines an approach for interfacing Synchronous Transfer Mode (STM) and Asynchronous Transfer Mode (ATM) networks and for transporting voice, fax and voice-band data calls by the ATM network in an efficient manner. In contrast to the well known ATM Variable Bit Rate (VBR) approach, this proposal allows one to transport 64 kb/s traffic efficiently over ATM by re-using STM network signaling and exploiting the standard AAL-1-type adaptation layer (intended for Constant Bite Rate, CBR, services). We use low bit rate encoding algorithms and achieve additional compression for speech by marking cells that do not contain talk spurts. The invention defines specific rules for STM-to-ATM interfacing, including all routing translation, and identifies necessary Terminal Adapter (TA) and ATM switch capabilities.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: January 20, 2004
    Assignee: AT&T Corp.
    Inventors: Behram H. Bharucha, Norman Farber, Thomas S. Giuffrida, Arik Kashper, Steven S. Katz
  • Patent number: 6680938
    Abstract: A method and system enable cross connection of an incoming data stream to one or more outgoing data streams. Each data stream comprises respective incoming and outgoing frames. Each frame includes one or more rows, and each row comprises a respective plurality of data segments. A reserved memory space is provided having a data storage capacity equal to an integer multiple of a data segment and less than one complete row. A data segment of an incoming row of an incoming frame is written to the reserved memory space. Subsequently, the data segment of the incoming row is read to an outgoing row of an outgoing frame from the reserved memory space. The writing and reading steps are timed such that the data segment is read from the reserved memory space before being over-written by another data segment.
    Type: Grant
    Filed: January 31, 2000
    Date of Patent: January 20, 2004
    Assignee: Nortel Networks Limited
    Inventors: Karl H Hammermeister, Richard G. Kusyk
  • Patent number: 6680939
    Abstract: A routing switch includes a first router module having N1 signal input terminals, M1 signal output terminals, an expansion input terminal and an expansion output terminal and including a core for routing a signal received at any one of the N1 signal input terminals selectively to any one or more of the output terminals and for routing a signal received at the expansion input terminal selectively to any one or more of the N1 signal output terminals. The router further includes a second router module having N2 signal input terminals, M2 signal output terminals, an expansion input terminal and an expansion output terminal and including a core for routing a signal received at any one of the N2 signal input terminals selectively to any one or more of the output terminals and for routing a signal received at the expansion input terminal selectively to any one or more of the M2 signal output terminals.
    Type: Grant
    Filed: September 14, 2000
    Date of Patent: January 20, 2004
    Assignee: NVision, INC
    Inventors: Donald S. Lydon, Charles S. Meyer, Kevin J. Shuholm, Jeffrey S. Evans
  • Patent number: 6680940
    Abstract: An apparatus for and method of encapsulating Ethernet frames over a Very high speed Digital Subscriber Line (VDSL) transport facility. The VDSL frames are transmitted over a point to point VDSL link where they are subsequently extracted and forwarded as standard Ethernet frames. The VDSL facility transport system comprises an Ethernet to VDSL Customer Premises Equipment (CPE) coupled to a DSL Access Multiplexor (DSLAM) over a VDSL transport facility. The Ethernet to VDSL CPE functions to receive a 10 BaseT Ethernet signal and encapsulate the Ethernet frame into a VDSL frame for transmission over the VDSL facility. The DSLAM is adapted to receive VDSL frames, extract Ethernet frames therefrom and generate and output a standard Ethernet signal. Ethernet frames are encapsulated within VDSL frames and transmitted on the wire pair without regard to the state of the Tx and Rx SOC signals output by the VDSL transceiver.
    Type: Grant
    Filed: May 19, 1999
    Date of Patent: January 20, 2004
    Assignee: 3Com Corporation
    Inventors: Amit Lewin, Yackov Sfadya, Eytan Mann, Yuri Poddobny
  • Patent number: 6680941
    Abstract: A process for the control of forwarding packets of completed packet sequences of packet-switched networks as well as a software module, an interface, a terminal device, and a server for this purpose. In these packets of packet sequences, information is transported segmentally. First, that the authorization of a packet to be forwarded is tested by using the transported information of the packet by way of comparison with a certain criterion, at least whenever the packet belongs at the start of a packet sequence (C11A, C12A, C13A).
    Type: Grant
    Filed: May 7, 1999
    Date of Patent: January 20, 2004
    Assignee: Alcatel
    Inventor: Bernhard Schmitz
  • Patent number: 6680942
    Abstract: A new directory service is established for a peer router receiving a data packet from an end station on a local area network connected to a port of the peer router, the peer router hereinafter being referred to as the source router. The data packet is addressed to a destination address. The source router determines that the data packet is to be encapsulated as an encapsulated packet, and the encapsulated packet routed by a peer-to-peer protocol to a destination router. The destination router then transmits the packet onto a local area network to the destination address. The source router locates the proper peer destination router by use of a database. The database is maintained on a server, where the database has entries for destination address, and an entry for a particular destination address gives the address of a peer router capable of routing a packet to that particular destination address.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: January 20, 2004
    Assignee: Cisco Technology, Inc.
    Inventors: Andrew Mead, Arunkumar Thippeswamy, John Lautmann, Mark Denny, Scott Bales
  • Patent number: 6680943
    Abstract: On receipt of a request for a communication session over a communications network, such as an Internet Protocol communications network, a path for the session is established. In a preferred example the communications network is an MPLS network and the method uses a modified version of the SIP messaging protocol. Bandwidth along a chosen path is reserved and a messaging protocol such as CR-LDP used to establish this reserved path for the communication session. Internet protocol and MPLS communications networks typically only support uni-directional flows. Several methods for establishing bi-directional communication sessions over internet protocol communications networks that use MPLS connections are described. This is particularly useful for telephony applications using internet protocol communications networks. In a preferred example, the established connection provides a guaranteed level of quality of service.
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: January 20, 2004
    Assignee: Nortel Networks Limited
    Inventors: Mark Robert Gibson, David Stacey
  • Patent number: 6680944
    Abstract: In order to predictively time stamp isochronous data packets transmitted over an IEEE 1394-1995 serial bus network, an application, which is to send a stream of isochronous data packets to a receiving node, first transmits a number of dummy frames each consisting of a number of packets. Preferably, these isochronous data packets make up frames of video data. From these dummy packets, the application obtains the time stamp values within the common isochronous packet (CIP) header of each packet. Using these obtained time stamp values, the application calculates a presentation time value for each data frame to be transmitted. The obtained time stamp value from a transmitted video frame is used to calculate the presentation time for a video frame which is a number of frames ahead within the transmit queue.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: January 20, 2004
    Assignees: Sony Corporation, Sony Electronics Inc.
    Inventors: Kevin K. Lym, Hisato Shima, Quan Vu
  • Patent number: 6680945
    Abstract: An integrated multiport switch operating in a packet switched network provides the capability via distributed egress logic to alter VLAN tags on a port by port basis. An internal rules checker (IRC) analyzes the header of a data frame to determine the frame type: untagged, VLAN-tagged, or priority-tagged. The IRC searches the untagged set table for the set of ports that are untagged for a particular VLAN. The IRC passes a forwarding descriptor that includes the frame type and a operational code (opcode) to a Port Vector FIFO logic (PVF). The PVF is responsible for creating a new opcode that instructs a dequeuing logic to add, remove, modify the VLAN tag, or send the frame unmodified. The opcodes generated by the PVF are individualized for each output port.
    Type: Grant
    Filed: May 24, 1999
    Date of Patent: January 20, 2004
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Shashank Merchant, Robert A. Williams
  • Patent number: 6680946
    Abstract: A method for transferring a series of layer-3 packets through an ATM network composed of a plurality of ATM switches is disclosed. An ingress gateway determines whether a packet flow has been registered and, when the flow has not been registered, determines a transfer route. A connection setup cell is transmitted to a next-hop ATM switch to ensure a connection dedicated to transfer of tho series of packets. Then, a series of packets is transferred to the next-hop ATM switch through the connection after the connection has been set up.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: January 20, 2004
    Assignee: NEC Corporation
    Inventors: Kazuhiko Isoyama, Toshiya Aramaki, Akira Arutaki
  • Patent number: 6680947
    Abstract: Auto-adaptive method of load balancing in a data transmission system wherein one active station (32) amongst a plurality of stations requests the access to the resources of a host (10), the active station being connected to a connected-oriented network linked to host (10) by means of a plurality of communication controllers (12, 14, 16) identified by the station (32) with the address of host (10), the connected-oriented network implementing a protocol in which route discovery frames are sent from the station (32) to all the communication controllers (12, 14, 16) and response frames are sent back with a predefined delay from each one of the communication controllers to the station (32), whereby the station (32) selects the route defined by the first received response frame, this method being characterized in that the delay to apply to the response frame is at each moment dynamically defined by using a logarithmic function of the current number of active stations.
    Type: Grant
    Filed: April 6, 2000
    Date of Patent: January 20, 2004
    Assignee: International Business Machines Corporation
    Inventors: Lionel Denecheau, Jean Claude Dispensa, Denis Esteve, Pascal Thubert
  • Patent number: 6680948
    Abstract: Packets are received at a first boundary node of a long haul optical communication network which may either interconnect originating and destination communication networks or form an integral part of a single end-to-end network. Packets are reclassified to reflect a higher priority of transmission than non-long haul bound packets, as by marking them with an indication of a modified priority level of transmission. Reclassified packets are transmitted over a long-haul optical link to a second boundary node. So that the modified priority level employed in the long-haul network may be understood by a destination network, packets arriving at the second boundary node may be re-mapped or reclassified to a value recognized as being of at least equal and, preferably, higher priority than that originally established by the originating network and/or first bounary node.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: January 20, 2004
    Assignee: Tyco Telecommunications (US) Inc.
    Inventors: Mohammed Majd, William C. Marra, Richard W. Muise, Peter K. Runge, Patrick R. Trischitta